This is the start of the stable review cycle for the 4.4.217 release.
There are 93 patches in this series, all will be posted as a response
to this one. If anyone has any issues with these being applied, please
let me know.
Responses should be made by Sat, 21 Mar 2020 12:37:04 +0000.
Anything received after that time might be too late.
The whole patch series can be found in one patch at:
https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.217-rc1.gz
or in the git tree and branch at:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
and the diffstat can be found below.
thanks,
greg k-h
-------------
Pseudo-Shortlog of commits:
Greg Kroah-Hartman <[email protected]>
Linux 4.4.217-rc1
Matteo Croce <[email protected]>
ipv4: ensure rcu_read_lock() in cipso_v4_error()
Jann Horn <[email protected]>
mm: slub: add missing TID bump in kmem_cache_alloc_bulk()
Kees Cook <[email protected]>
ARM: 8958/1: rename missed uaccess .fixup section
Florian Fainelli <[email protected]>
ARM: 8957/1: VDSO: Match ARMv8 timer in cntvct_functional()
Qian Cai <[email protected]>
jbd2: fix data races at struct journal_head
Linus Torvalds <[email protected]>
signal: avoid double atomic counter increments for user accounting
Marek Vasut <[email protected]>
net: ks8851-ml: Fix IRQ handling and locking
Kim Phillips <[email protected]>
perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT flag
Sven Eckelmann <[email protected]>
batman-adv: Don't schedule OGM for disabled interface
Sven Eckelmann <[email protected]>
batman-adv: Avoid free/alloc race when handling OGM buffer
Sven Eckelmann <[email protected]>
batman-adv: Only read OGM tvlv_len after buffer len check
Sven Eckelmann <[email protected]>
batman-adv: Reduce tt_global hash refcnt only for removed entry
Sven Eckelmann <[email protected]>
batman-adv: Reduce tt_local hash refcnt only for removed entry
Sven Eckelmann <[email protected]>
batman-adv: Reduce claim hash refcnt only for removed entry
Sven Eckelmann <[email protected]>
batman-adv: Prevent duplicated tvlv handler
Sven Eckelmann <[email protected]>
batman-adv: Prevent duplicated global TT entry
Sven Eckelmann <[email protected]>
batman-adv: Prevent duplicated nc_node entry
Sven Eckelmann <[email protected]>
batman-adv: Prevent duplicated gateway_node entry
Linus Lüssing <[email protected]>
batman-adv: Avoid storing non-TT-sync flags on singular entries too
Sven Eckelmann <[email protected]>
batman-adv: Fix debugfs path for renamed softif
Sven Eckelmann <[email protected]>
batman-adv: Fix debugfs path for renamed hardif
Marek Lindner <[email protected]>
batman-adv: prevent TT request storms by not sending inconsistent TT TLVLs
Linus Lüssing <[email protected]>
batman-adv: Fix TT sync flags for intermediate TT responses
Sven Eckelmann <[email protected]>
batman-adv: Avoid race in TT TVLV allocator helper
Sven Eckelmann <[email protected]>
batman-adv: Fix skbuff rcsum on packet reroute
Matthias Schiffer <[email protected]>
batman-adv: update data pointers after skb_cow()
Sven Eckelmann <[email protected]>
batman-adv: Fix internal interface indices types
Sven Eckelmann <[email protected]>
batman-adv: Fix lock for ogm cnt access in batadv_iv_ogm_calc_tq
Linus Lüssing <[email protected]>
batman-adv: fix TT sync flag inconsistencies
Sven Eckelmann <[email protected]>
batman-adv: Fix rx packet/bytes stats on local ARP reply
Linus Lüssing <[email protected]>
batman-adv: Fix transmission of final, 16th fragment
Sven Eckelmann <[email protected]>
batman-adv: Fix double free during fragment merge error
Sven Eckelmann <[email protected]>
batman-adv: Add missing refcnt for last_candidate
Sven Eckelmann <[email protected]>
batman-adv: Fix speedy join in gateway client mode
Sven Eckelmann <[email protected]>
batman-adv: Free last_bonding_candidate on release of orig_node
Sven Eckelmann <[email protected]>
batman-adv: Fix reference leak in batadv_find_router
Sven Eckelmann <[email protected]>
batman-adv: Fix non-atomic bla_claim::backbone_gw access
Simon Wunderlich <[email protected]>
batman-adv: lock crc access in bridge loop avoidance
Sven Eckelmann <[email protected]>
batman-adv: Fix orig_node_vlan leak on orig_node_release
Sven Eckelmann <[email protected]>
batman-adv: Avoid nullptr dereference in dat after vlan_insert_tag
Sven Eckelmann <[email protected]>
batman-adv: Avoid nullptr dereference in bla after vlan_insert_tag
Sven Eckelmann <[email protected]>
batman-adv: Clean up untagged vlan when destroying via rtnl-link
Sven Eckelmann <[email protected]>
batman-adv: Fix ICMP RR ethernet access after skb_linearize
Sven Eckelmann <[email protected]>
batman-adv: Fix use-after-free/double-free of tt_req_node
Florian Westphal <[email protected]>
batman-adv: fix skb deref after free
Linus Lüssing <[email protected]>
batman-adv: Avoid duplicate neigh_node additions
Sven Eckelmann <[email protected]>
batman-adv: Fix reference counting of vlan object for tt_local_entry
Sven Eckelmann <[email protected]>
batman-adv: Drop reference to netdevice on last reference
Sven Eckelmann <[email protected]>
batman-adv: Deactivate TO_BE_ACTIVATED hardif on shutdown
Marek Lindner <[email protected]>
batman-adv: init neigh node last seen field
Sven Eckelmann <[email protected]>
batman-adv: Fix integer overflow in batadv_iv_ogm_calc_tq
Sven Eckelmann <[email protected]>
batman-adv: Fix unexpected free of bcast_own on add_if error
Andrew Lunn <[email protected]>
batman-adv: Avoid endless loop in bat-on-bat netdevice check
Sven Eckelmann <[email protected]>
batman-adv: Only put orig_node_vlan list reference when removed
Sven Eckelmann <[email protected]>
batman-adv: Only put gw_node list reference when removed
Sven Eckelmann <[email protected]>
batman-adv: Fix invalid read while copying bat_iv.bcast_own
Vladis Dronov <[email protected]>
efi: Add a sanity check to efivar_store_raw()
Eric Dumazet <[email protected]>
ipv6: restrict IPV6_ADDRFORM operation
qize wang <[email protected]>
mwifiex: Fix heap overflow in mmwifiex_process_tdls_action_frame()
Daniel Drake <[email protected]>
iommu/vt-d: Ignore devices with out-of-spec domain number
Zhenzhong Duan <[email protected]>
iommu/vt-d: Fix the wrong printing in RHSA parsing
Jakub Kicinski <[email protected]>
netfilter: cthelper: add missing attribute validation for cthelper
Jakub Kicinski <[email protected]>
nl80211: add missing attribute validation for channel switch
Jakub Kicinski <[email protected]>
nl80211: add missing attribute validation for critical protocol indication
Yonghyun Hwang <[email protected]>
iommu/vt-d: Fix a bug in intel_iommu_iova_to_phys() for huge page
Hans de Goede <[email protected]>
iommu/vt-d: dmar: replace WARN_TAINT with pr_warn + add_taint
Vladis Dronov <[email protected]>
efi: Fix a race and a buffer overflow while reading efivars via sysfs
Eugeniy Paltsev <[email protected]>
ARC: define __ALIGN_STR and __ALIGN symbols for ARC
Vitaly Kuznetsov <[email protected]>
KVM: x86: clear stale x86_emulate_ctxt->intercept value
Al Viro <[email protected]>
gfs2_atomic_open(): fix O_EXCL|O_CREAT handling on cold dcache
Colin Ian King <[email protected]>
drm/amd/display: remove duplicated assignment to grph_obj_type
Hans de Goede <[email protected]>
iommu/vt-d: quirk_ioat_snb_local_iommu: replace WARN_TAINT with pr_warn + add_taint
Jakub Kicinski <[email protected]>
net: fq: add missing attribute validation for orphan mask
Eric Dumazet <[email protected]>
bonding/alb: make sure arp header is pulled before accessing it
Eric Dumazet <[email protected]>
slip: make slhc_compress() more robust against malicious packets
Jakub Kicinski <[email protected]>
net: fec: validate the new settings in fec_enet_set_coalesce()
Mahesh Bandewar <[email protected]>
macvlan: add cond_resched() during multicast processing
Mahesh Bandewar <[email protected]>
ipvlan: don't deref eth hdr before checking it's set
Eric Dumazet <[email protected]>
ipvlan: do not use cond_resched_rcu() in ipvlan_process_multicast()
Paolo Abeni <[email protected]>
ipvlan: egress mcast packets are not exceptional
Jiri Wiesner <[email protected]>
ipvlan: do not add hardware address of master to its unicast filter list
Mahesh Bandewar <[email protected]>
ipvlan: add cond_resched_rcu() while processing muticast backlog
Jakub Kicinski <[email protected]>
nfc: add missing attribute validation for vendor subcommand
Jakub Kicinski <[email protected]>
nfc: add missing attribute validation for SE API
Jakub Kicinski <[email protected]>
team: add missing attribute validation for array index
Jakub Kicinski <[email protected]>
team: add missing attribute validation for port ifindex
Jakub Kicinski <[email protected]>
nl802154: add missing attribute validation for dev_type
Jakub Kicinski <[email protected]>
nl802154: add missing attribute validation
Jakub Kicinski <[email protected]>
fib: add missing attribute validation for tun_id
Vasundhara Volam <[email protected]>
bnxt_en: reinitialize IRQs when MTU is modified
Dan Carpenter <[email protected]>
net: nfc: fix bounds checking bugs on "pipe"
You-Sheng Yang <[email protected]>
r8152: check disconnect status after long sleep
Petr Malat <[email protected]>
NFS: Remove superfluous kmap in nfs_readdir_xdr_to_array
-------------
Diffstat:
Makefile | 4 +-
arch/arc/include/asm/linkage.h | 2 +
arch/arm/kernel/vdso.c | 2 +
arch/arm/lib/copy_from_user.S | 2 +-
arch/x86/kernel/cpu/perf_event_amd_uncore.c | 16 +-
arch/x86/kvm/emulate.c | 1 +
drivers/firmware/efi/efivars.c | 32 +++-
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 3 +-
drivers/iommu/dmar.c | 21 ++-
drivers/iommu/intel-iommu.c | 13 +-
drivers/net/bonding/bond_alb.c | 20 +--
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 4 +-
drivers/net/ethernet/freescale/fec_main.c | 6 +-
drivers/net/ethernet/micrel/ks8851_mll.c | 14 +-
drivers/net/ipvlan/ipvlan_core.c | 19 +-
drivers/net/ipvlan/ipvlan_main.c | 5 +-
drivers/net/macvlan.c | 2 +
drivers/net/slip/slhc.c | 14 +-
drivers/net/team/team.c | 2 +
drivers/net/usb/r8152.c | 6 +
drivers/net/wireless/mwifiex/tdls.c | 70 +++++++-
fs/gfs2/inode.c | 2 +-
fs/jbd2/transaction.c | 8 +-
fs/nfs/dir.c | 2 -
include/net/fib_rules.h | 1 +
kernel/signal.c | 23 ++-
mm/slub.c | 9 +
net/batman-adv/bat_iv_ogm.c | 115 +++++++++----
net/batman-adv/bridge_loop_avoidance.c | 152 +++++++++++++---
net/batman-adv/debugfs.c | 40 +++++
net/batman-adv/debugfs.h | 11 ++
net/batman-adv/distributed-arp-table.c | 15 +-
net/batman-adv/fragmentation.c | 14 +-
net/batman-adv/gateway_client.c | 18 +-
net/batman-adv/hard-interface.c | 89 ++++++++--
net/batman-adv/hard-interface.h | 6 +-
net/batman-adv/main.c | 8 +-
net/batman-adv/network-coding.c | 33 ++--
net/batman-adv/originator.c | 26 ++-
net/batman-adv/originator.h | 4 +-
net/batman-adv/routing.c | 111 +++++++++---
net/batman-adv/send.c | 4 +-
net/batman-adv/soft-interface.c | 9 +
net/batman-adv/translation-table.c | 249 ++++++++++++++++++---------
net/batman-adv/types.h | 23 ++-
net/ieee802154/nl_policy.c | 6 +
net/ipv4/cipso_ipv4.c | 7 +-
net/ipv6/ipv6_sockglue.c | 10 +-
net/netfilter/nfnetlink_cthelper.c | 2 +
net/nfc/hci/core.c | 19 +-
net/nfc/netlink.c | 3 +
net/sched/sch_fq.c | 1 +
net/wireless/nl80211.c | 3 +
53 files changed, 963 insertions(+), 318 deletions(-)
From: Vasundhara Volam <[email protected]>
[ Upstream commit a9b952d267e59a3b405e644930f46d252cea7122 ]
MTU changes may affect the number of IRQs so we must call
bnxt_close_nic()/bnxt_open_nic() with the irq_re_init parameter
set to true. The reason is that a larger MTU may require
aggregation rings not needed with smaller MTU. We may not be
able to allocate the required number of aggregation rings and
so we reduce the number of channels which will change the number
of IRQs. Without this patch, it may crash eventually in
pci_disable_msix() when the IRQs are not properly unwound.
Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Vasundhara Volam <[email protected]>
Signed-off-by: Michael Chan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5310,13 +5310,13 @@ static int bnxt_change_mtu(struct net_de
return -EINVAL;
if (netif_running(dev))
- bnxt_close_nic(bp, false, false);
+ bnxt_close_nic(bp, true, false);
dev->mtu = new_mtu;
bnxt_set_ring_params(bp);
if (netif_running(dev))
- return bnxt_open_nic(bp, false, false);
+ return bnxt_open_nic(bp, true, false);
return 0;
}
From: Eric Dumazet <[email protected]>
[ Upstream commit afe207d80a61e4d6e7cfa0611a4af46d0ba95628 ]
Commit e18b353f102e ("ipvlan: add cond_resched_rcu() while
processing muticast backlog") added a cond_resched_rcu() in a loop
using rcu protection to iterate over slaves.
This is breaking rcu rules, so lets instead use cond_resched()
at a point we can reschedule
Fixes: e18b353f102e ("ipvlan: add cond_resched_rcu() while processing muticast backlog")
Signed-off-by: Eric Dumazet <[email protected]>
Cc: Mahesh Bandewar <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/ipvlan/ipvlan_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -240,7 +240,6 @@ void ipvlan_process_multicast(struct wor
ret = netif_rx(nskb);
acct:
ipvlan_count_rx(ipvlan, len, ret == NET_RX_SUCCESS, true);
- cond_resched_rcu();
}
rcu_read_unlock();
@@ -252,6 +251,7 @@ acct:
} else {
kfree_skb(skb);
}
+ cond_resched();
}
}
From: Jakub Kicinski <[email protected]>
[ Upstream commit dd25cb272ccce4db67dc8509278229099e4f5e99 ]
Add missing attribute validation for TEAM_ATTR_OPTION_PORT_IFINDEX
to the netlink policy.
Fixes: 80f7c6683fe0 ("team: add support for per-port options")
Signed-off-by: Jakub Kicinski <[email protected]>
Reviewed-by: Jiri Pirko <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/team/team.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -2169,6 +2169,7 @@ team_nl_option_policy[TEAM_ATTR_OPTION_M
[TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
[TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
[TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
+ [TEAM_ATTR_OPTION_PORT_IFINDEX] = { .type = NLA_U32 },
};
static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
From: Sven Eckelmann <[email protected]>
commit f7dcdf5fdbe8fec7670d8f65a5db595c98e0ecab upstream.
The function batadv_iv_ogm_orig_add_if allocates new buffers for bcast_own
and bcast_own_sum. It is expected that these buffers are unchanged in case
either bcast_own or bcast_own_sum couldn't be resized.
But the error handling of this function frees the already resized buffer
for bcast_own when the allocation of the new bcast_own_sum buffer failed.
This will lead to an invalid memory access when some code will try to
access bcast_own.
Instead the resized new bcast_own buffer has to be kept. This will not lead
to problems because the size of the buffer was only increased and therefore
no user of the buffer will try to access bytes outside of the new buffer.
Fixes: d0015fdd3d2c ("batman-adv: provide orig_node routing API")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bat_iv_ogm.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -155,10 +155,8 @@ static int batadv_iv_ogm_orig_add_if(str
orig_node->bat_iv.bcast_own = data_ptr;
data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC);
- if (!data_ptr) {
- kfree(orig_node->bat_iv.bcast_own);
+ if (!data_ptr)
goto unlock;
- }
memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum,
(max_if_num - 1) * sizeof(u8));
From: Jakub Kicinski <[email protected]>
commit c049b3450072b8e3998053490e025839fecfef31 upstream.
Add missing attribute validation for cthelper
to the netlink policy.
Fixes: 12f7a505331e ("netfilter: add user-space connection tracking helper infrastructure")
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Pablo Neira Ayuso <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/netfilter/nfnetlink_cthelper.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -711,6 +711,8 @@ static const struct nla_policy nfnl_cthe
[NFCTH_NAME] = { .type = NLA_NUL_STRING,
.len = NF_CT_HELPER_NAME_LEN-1 },
[NFCTH_QUEUE_NUM] = { .type = NLA_U32, },
+ [NFCTH_PRIV_DATA_LEN] = { .type = NLA_U32, },
+ [NFCTH_STATUS] = { .type = NLA_U32, },
};
static const struct nfnl_callback nfnl_cthelper_cb[NFNL_MSG_CTHELPER_MAX] = {
From: Sven Eckelmann <[email protected]>
commit 8ba0f9bd3bdea1058c2b2676bec7905724418e40 upstream.
The functions batadv_tt_prepare_tvlv_local_data and
batadv_tt_prepare_tvlv_global_data are responsible for preparing a buffer
which can be used to store the TVLV container for TT and add the VLAN
information to it.
This will be done in three phases:
1. count the number of VLANs and their entries
2. allocate the buffer using the counters from the previous step and limits
from the caller (parameter tt_len)
3. insert the VLAN information to the buffer
The step 1 and 3 operate on a list which contains the VLANs. The access to
these lists must be protected with an appropriate lock or otherwise they
might operate on on different entries. This could for example happen when
another context is adding VLAN entries to this list.
This could lead to a buffer overflow in these functions when enough entries
were added between step 1 and 3 to the VLAN lists that the buffer room for
the entries (*tt_change) is smaller then the now required extra buffer for
new VLAN entries.
Fixes: 7ea7b4a14275 ("batman-adv: make the TT CRC logic VLAN specific")
Signed-off-by: Sven Eckelmann <[email protected]>
Acked-by: Antonio Quartulli <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -744,7 +744,7 @@ batadv_tt_prepare_tvlv_global_data(struc
struct batadv_orig_node_vlan *vlan;
u8 *tt_change_ptr;
- rcu_read_lock();
+ spin_lock_bh(&orig_node->vlan_list_lock);
hlist_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) {
num_vlan++;
num_entries += atomic_read(&vlan->tt.num_entries);
@@ -782,7 +782,7 @@ batadv_tt_prepare_tvlv_global_data(struc
*tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
out:
- rcu_read_unlock();
+ spin_unlock_bh(&orig_node->vlan_list_lock);
return tvlv_len;
}
@@ -818,7 +818,7 @@ batadv_tt_prepare_tvlv_local_data(struct
u8 *tt_change_ptr;
int change_offset;
- rcu_read_lock();
+ spin_lock_bh(&bat_priv->softif_vlan_list_lock);
hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
num_vlan++;
num_entries += atomic_read(&vlan->tt.num_entries);
@@ -856,7 +856,7 @@ batadv_tt_prepare_tvlv_local_data(struct
*tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr;
out:
- rcu_read_unlock();
+ spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
return tvlv_len;
}
From: Jakub Kicinski <[email protected]>
[ Upstream commit ab14961d10d02d20767612c78ce148f6eb85bd58 ]
fec_enet_set_coalesce() validates the previously set params
and if they are within range proceeds to apply the new ones.
The new ones, however, are not validated. This seems backwards,
probably a copy-paste error?
Compile tested only.
Fixes: d851b47b22fc ("net: fec: add interrupt coalescence feature support")
Signed-off-by: Jakub Kicinski <[email protected]>
Acked-by: Fugang Duan <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/ethernet/freescale/fec_main.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2510,15 +2510,15 @@ fec_enet_set_coalesce(struct net_device
return -EINVAL;
}
- cycle = fec_enet_us_to_itr_clock(ndev, fep->rx_time_itr);
+ cycle = fec_enet_us_to_itr_clock(ndev, ec->rx_coalesce_usecs);
if (cycle > 0xFFFF) {
pr_err("Rx coalesed usec exceeed hardware limiation");
return -EINVAL;
}
- cycle = fec_enet_us_to_itr_clock(ndev, fep->tx_time_itr);
+ cycle = fec_enet_us_to_itr_clock(ndev, ec->tx_coalesce_usecs);
if (cycle > 0xFFFF) {
- pr_err("Rx coalesed usec exceeed hardware limiation");
+ pr_err("Tx coalesed usec exceeed hardware limiation");
return -EINVAL;
}
From: Sven Eckelmann <[email protected]>
commit 140ed8e87ca8f4875c2b146cdb2cdbf0c9ac6080 upstream.
The references to the network device should be dropped inside the release
function for batadv_hard_iface similar to what is done with the batman-adv
internal datastructures.
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/hard-interface.c | 13 ++++++++-----
net/batman-adv/hard-interface.h | 6 +++---
2 files changed, 11 insertions(+), 8 deletions(-)
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -45,13 +45,16 @@
#include "sysfs.h"
#include "translation-table.h"
-void batadv_hardif_free_rcu(struct rcu_head *rcu)
+/**
+ * batadv_hardif_release - release hard interface from lists and queue for
+ * free after rcu grace period
+ * @hard_iface: the hard interface to free
+ */
+void batadv_hardif_release(struct batadv_hard_iface *hard_iface)
{
- struct batadv_hard_iface *hard_iface;
-
- hard_iface = container_of(rcu, struct batadv_hard_iface, rcu);
dev_put(hard_iface->net_dev);
- kfree(hard_iface);
+
+ kfree_rcu(hard_iface, rcu);
}
struct batadv_hard_iface *
--- a/net/batman-adv/hard-interface.h
+++ b/net/batman-adv/hard-interface.h
@@ -61,18 +61,18 @@ void batadv_hardif_disable_interface(str
void batadv_hardif_remove_interfaces(void);
int batadv_hardif_min_mtu(struct net_device *soft_iface);
void batadv_update_min_mtu(struct net_device *soft_iface);
-void batadv_hardif_free_rcu(struct rcu_head *rcu);
+void batadv_hardif_release(struct batadv_hard_iface *hard_iface);
/**
* batadv_hardif_free_ref - decrement the hard interface refcounter and
- * possibly free it
+ * possibly release it
* @hard_iface: the hard interface to free
*/
static inline void
batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
{
if (atomic_dec_and_test(&hard_iface->refcount))
- call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
+ batadv_hardif_release(hard_iface);
}
static inline struct batadv_hard_iface *
From: Sven Eckelmann <[email protected]>
commit 5ba7dcfe77037b67016263ea597a8b431692ecab upstream.
The originator node object orig_neigh_node is used to when accessing the
bcast_own(_sum) and real_packet_count information. The access to them has
to be protected with the spinlock in orig_neigh_node.
But the function uses the lock in orig_node instead. This is incorrect
because they could be two different originator node objects.
Fixes: 0ede9f41b217 ("batman-adv: protect bit operations to count OGMs with spinlock")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bat_iv_ogm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -1180,7 +1180,7 @@ static int batadv_iv_ogm_calc_tq(struct
orig_node->last_seen = jiffies;
/* find packet count of corresponding one hop neighbor */
- spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock);
+ spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock);
if_num = if_incoming->if_num;
orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num];
neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing);
@@ -1190,7 +1190,7 @@ static int batadv_iv_ogm_calc_tq(struct
} else {
neigh_rq_count = 0;
}
- spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock);
+ spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock);
/* pay attention to not get a value bigger than 100 % */
if (orig_eq_count > neigh_rq_count)
From: qize wang <[email protected]>
commit 1e58252e334dc3f3756f424a157d1b7484464c40 upstream.
mwifiex_process_tdls_action_frame() without checking
the incoming tdls infomation element's vality before use it,
this may cause multi heap buffer overflows.
Fix them by putting vality check before use it.
IE is TLV struct, but ht_cap and ht_oper aren’t TLV struct.
the origin marvell driver code is wrong:
memcpy(&sta_ptr->tdls_cap.ht_oper, pos,....
memcpy((u8 *)&sta_ptr->tdls_cap.ht_capb, pos,...
Fix the bug by changing pos(the address of IE) to
pos+2 ( the address of IE value ).
Signed-off-by: qize wang <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Signed-off-by: Matthias Maennich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/wireless/mwifiex/tdls.c | 70 ++++++++++++++++++++++++++++++++----
1 file changed, 64 insertions(+), 6 deletions(-)
--- a/drivers/net/wireless/mwifiex/tdls.c
+++ b/drivers/net/wireless/mwifiex/tdls.c
@@ -910,59 +910,117 @@ void mwifiex_process_tdls_action_frame(s
switch (*pos) {
case WLAN_EID_SUPP_RATES:
+ if (pos[1] > 32)
+ return;
sta_ptr->tdls_cap.rates_len = pos[1];
for (i = 0; i < pos[1]; i++)
sta_ptr->tdls_cap.rates[i] = pos[i + 2];
break;
case WLAN_EID_EXT_SUPP_RATES:
+ if (pos[1] > 32)
+ return;
basic = sta_ptr->tdls_cap.rates_len;
+ if (pos[1] > 32 - basic)
+ return;
for (i = 0; i < pos[1]; i++)
sta_ptr->tdls_cap.rates[basic + i] = pos[i + 2];
sta_ptr->tdls_cap.rates_len += pos[1];
break;
case WLAN_EID_HT_CAPABILITY:
- memcpy((u8 *)&sta_ptr->tdls_cap.ht_capb, pos,
+ if (pos > end - sizeof(struct ieee80211_ht_cap) - 2)
+ return;
+ if (pos[1] != sizeof(struct ieee80211_ht_cap))
+ return;
+ /* copy the ie's value into ht_capb*/
+ memcpy((u8 *)&sta_ptr->tdls_cap.ht_capb, pos + 2,
sizeof(struct ieee80211_ht_cap));
sta_ptr->is_11n_enabled = 1;
break;
case WLAN_EID_HT_OPERATION:
- memcpy(&sta_ptr->tdls_cap.ht_oper, pos,
+ if (pos > end -
+ sizeof(struct ieee80211_ht_operation) - 2)
+ return;
+ if (pos[1] != sizeof(struct ieee80211_ht_operation))
+ return;
+ /* copy the ie's value into ht_oper*/
+ memcpy(&sta_ptr->tdls_cap.ht_oper, pos + 2,
sizeof(struct ieee80211_ht_operation));
break;
case WLAN_EID_BSS_COEX_2040:
+ if (pos > end - 3)
+ return;
+ if (pos[1] != 1)
+ return;
sta_ptr->tdls_cap.coex_2040 = pos[2];
break;
case WLAN_EID_EXT_CAPABILITY:
+ if (pos > end - sizeof(struct ieee_types_header))
+ return;
+ if (pos[1] < sizeof(struct ieee_types_header))
+ return;
+ if (pos[1] > 8)
+ return;
memcpy((u8 *)&sta_ptr->tdls_cap.extcap, pos,
sizeof(struct ieee_types_header) +
min_t(u8, pos[1], 8));
break;
case WLAN_EID_RSN:
+ if (pos > end - sizeof(struct ieee_types_header))
+ return;
+ if (pos[1] < sizeof(struct ieee_types_header))
+ return;
+ if (pos[1] > IEEE_MAX_IE_SIZE -
+ sizeof(struct ieee_types_header))
+ return;
memcpy((u8 *)&sta_ptr->tdls_cap.rsn_ie, pos,
sizeof(struct ieee_types_header) +
min_t(u8, pos[1], IEEE_MAX_IE_SIZE -
sizeof(struct ieee_types_header)));
break;
case WLAN_EID_QOS_CAPA:
+ if (pos > end - 3)
+ return;
+ if (pos[1] != 1)
+ return;
sta_ptr->tdls_cap.qos_info = pos[2];
break;
case WLAN_EID_VHT_OPERATION:
- if (priv->adapter->is_hw_11ac_capable)
- memcpy(&sta_ptr->tdls_cap.vhtoper, pos,
+ if (priv->adapter->is_hw_11ac_capable) {
+ if (pos > end -
+ sizeof(struct ieee80211_vht_operation) - 2)
+ return;
+ if (pos[1] !=
+ sizeof(struct ieee80211_vht_operation))
+ return;
+ /* copy the ie's value into vhtoper*/
+ memcpy(&sta_ptr->tdls_cap.vhtoper, pos + 2,
sizeof(struct ieee80211_vht_operation));
+ }
break;
case WLAN_EID_VHT_CAPABILITY:
if (priv->adapter->is_hw_11ac_capable) {
- memcpy((u8 *)&sta_ptr->tdls_cap.vhtcap, pos,
+ if (pos > end -
+ sizeof(struct ieee80211_vht_cap) - 2)
+ return;
+ if (pos[1] != sizeof(struct ieee80211_vht_cap))
+ return;
+ /* copy the ie's value into vhtcap*/
+ memcpy((u8 *)&sta_ptr->tdls_cap.vhtcap, pos + 2,
sizeof(struct ieee80211_vht_cap));
sta_ptr->is_11ac_enabled = 1;
}
break;
case WLAN_EID_AID:
- if (priv->adapter->is_hw_11ac_capable)
+ if (priv->adapter->is_hw_11ac_capable) {
+ if (pos > end - 4)
+ return;
+ if (pos[1] != 2)
+ return;
sta_ptr->tdls_cap.aid =
le16_to_cpu(*(__le16 *)(pos + 2));
+ }
+ break;
default:
break;
}
From: Sven Eckelmann <[email protected]>
commit 3db0decf1185357d6ab2256d0dede1ca9efda03d upstream.
The pointer batadv_bla_claim::backbone_gw can be changed at any time.
Therefore, access to it must be protected to ensure that two function
accessing the same backbone_gw are actually accessing the same. This is
especially important when the crc_lock is used or when the backbone_gw of a
claim is exchanged.
Not doing so leads to invalid memory access and/or reference leaks.
Fixes: 23721387c409 ("batman-adv: add basic bridge loop avoidance code")
Fixes: 5a1dd8a4773d ("batman-adv: lock crc access in bridge loop avoidance")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bridge_loop_avoidance.c | 112 ++++++++++++++++++++++++++-------
net/batman-adv/types.h | 1
2 files changed, 90 insertions(+), 23 deletions(-)
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -129,7 +129,19 @@ batadv_backbone_gw_free_ref(struct batad
/* finally deinitialize the claim */
static void batadv_claim_release(struct batadv_bla_claim *claim)
{
- batadv_backbone_gw_free_ref(claim->backbone_gw);
+ struct batadv_bla_backbone_gw *old_backbone_gw;
+
+ spin_lock_bh(&claim->backbone_lock);
+ old_backbone_gw = claim->backbone_gw;
+ claim->backbone_gw = NULL;
+ spin_unlock_bh(&claim->backbone_lock);
+
+ spin_lock_bh(&old_backbone_gw->crc_lock);
+ old_backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
+ spin_unlock_bh(&old_backbone_gw->crc_lock);
+
+ batadv_backbone_gw_free_ref(old_backbone_gw);
+
kfree_rcu(claim, rcu);
}
@@ -579,8 +591,10 @@ static void batadv_bla_add_claim(struct
const u8 *mac, const unsigned short vid,
struct batadv_bla_backbone_gw *backbone_gw)
{
+ struct batadv_bla_backbone_gw *old_backbone_gw;
struct batadv_bla_claim *claim;
struct batadv_bla_claim search_claim;
+ bool remove_crc = false;
int hash_added;
ether_addr_copy(search_claim.addr, mac);
@@ -594,8 +608,10 @@ static void batadv_bla_add_claim(struct
return;
ether_addr_copy(claim->addr, mac);
+ spin_lock_init(&claim->backbone_lock);
claim->vid = vid;
claim->lasttime = jiffies;
+ atomic_inc(&backbone_gw->refcount);
claim->backbone_gw = backbone_gw;
atomic_set(&claim->refcount, 2);
@@ -622,15 +638,26 @@ static void batadv_bla_add_claim(struct
"bla_add_claim(): changing ownership for %pM, vid %d\n",
mac, BATADV_PRINT_VID(vid));
- spin_lock_bh(&claim->backbone_gw->crc_lock);
- claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
- spin_unlock_bh(&claim->backbone_gw->crc_lock);
- batadv_backbone_gw_free_ref(claim->backbone_gw);
+ remove_crc = true;
}
- /* set (new) backbone gw */
+
+ /* replace backbone_gw atomically and adjust reference counters */
+ spin_lock_bh(&claim->backbone_lock);
+ old_backbone_gw = claim->backbone_gw;
atomic_inc(&backbone_gw->refcount);
claim->backbone_gw = backbone_gw;
+ spin_unlock_bh(&claim->backbone_lock);
+ if (remove_crc) {
+ /* remove claim address from old backbone_gw */
+ spin_lock_bh(&old_backbone_gw->crc_lock);
+ old_backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
+ spin_unlock_bh(&old_backbone_gw->crc_lock);
+ }
+
+ batadv_backbone_gw_free_ref(old_backbone_gw);
+
+ /* add claim address to new backbone_gw */
spin_lock_bh(&backbone_gw->crc_lock);
backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
spin_unlock_bh(&backbone_gw->crc_lock);
@@ -640,6 +667,26 @@ claim_free_ref:
batadv_claim_free_ref(claim);
}
+/**
+ * batadv_bla_claim_get_backbone_gw - Get valid reference for backbone_gw of
+ * claim
+ * @claim: claim whose backbone_gw should be returned
+ *
+ * Return: valid reference to claim::backbone_gw
+ */
+static struct batadv_bla_backbone_gw *
+batadv_bla_claim_get_backbone_gw(struct batadv_bla_claim *claim)
+{
+ struct batadv_bla_backbone_gw *backbone_gw;
+
+ spin_lock_bh(&claim->backbone_lock);
+ backbone_gw = claim->backbone_gw;
+ atomic_inc(&backbone_gw->refcount);
+ spin_unlock_bh(&claim->backbone_lock);
+
+ return backbone_gw;
+}
+
/* Delete a claim from the claim hash which has the
* given mac address and vid.
*/
@@ -661,10 +708,6 @@ static void batadv_bla_del_claim(struct
batadv_choose_claim, claim);
batadv_claim_free_ref(claim); /* reference from the hash is gone */
- spin_lock_bh(&claim->backbone_gw->crc_lock);
- claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
- spin_unlock_bh(&claim->backbone_gw->crc_lock);
-
/* don't need the reference from hash_find() anymore */
batadv_claim_free_ref(claim);
}
@@ -1074,6 +1117,7 @@ static void batadv_bla_purge_claims(stru
struct batadv_hard_iface *primary_if,
int now)
{
+ struct batadv_bla_backbone_gw *backbone_gw;
struct batadv_bla_claim *claim;
struct hlist_head *head;
struct batadv_hashtable *hash;
@@ -1088,14 +1132,17 @@ static void batadv_bla_purge_claims(stru
rcu_read_lock();
hlist_for_each_entry_rcu(claim, head, hash_entry) {
+ backbone_gw = batadv_bla_claim_get_backbone_gw(claim);
if (now)
goto purge_now;
- if (!batadv_compare_eth(claim->backbone_gw->orig,
+
+ if (!batadv_compare_eth(backbone_gw->orig,
primary_if->net_dev->dev_addr))
- continue;
+ goto skip;
+
if (!batadv_has_timed_out(claim->lasttime,
BATADV_BLA_CLAIM_TIMEOUT))
- continue;
+ goto skip;
batadv_dbg(BATADV_DBG_BLA, bat_priv,
"bla_purge_claims(): %pM, vid %d, time out\n",
@@ -1103,8 +1150,10 @@ static void batadv_bla_purge_claims(stru
purge_now:
batadv_handle_unclaim(bat_priv, primary_if,
- claim->backbone_gw->orig,
+ backbone_gw->orig,
claim->addr, claim->vid);
+skip:
+ batadv_backbone_gw_free_ref(backbone_gw);
}
rcu_read_unlock();
}
@@ -1488,9 +1537,11 @@ void batadv_bla_free(struct batadv_priv
int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
unsigned short vid, bool is_bcast)
{
+ struct batadv_bla_backbone_gw *backbone_gw;
struct ethhdr *ethhdr;
struct batadv_bla_claim search_claim, *claim = NULL;
struct batadv_hard_iface *primary_if;
+ bool own_claim;
int ret;
ethhdr = eth_hdr(skb);
@@ -1522,8 +1573,12 @@ int batadv_bla_rx(struct batadv_priv *ba
}
/* if it is our own claim ... */
- if (batadv_compare_eth(claim->backbone_gw->orig,
- primary_if->net_dev->dev_addr)) {
+ backbone_gw = batadv_bla_claim_get_backbone_gw(claim);
+ own_claim = batadv_compare_eth(backbone_gw->orig,
+ primary_if->net_dev->dev_addr);
+ batadv_backbone_gw_free_ref(backbone_gw);
+
+ if (own_claim) {
/* ... allow it in any case */
claim->lasttime = jiffies;
goto allow;
@@ -1586,7 +1641,9 @@ int batadv_bla_tx(struct batadv_priv *ba
{
struct ethhdr *ethhdr;
struct batadv_bla_claim search_claim, *claim = NULL;
+ struct batadv_bla_backbone_gw *backbone_gw;
struct batadv_hard_iface *primary_if;
+ bool client_roamed;
int ret = 0;
primary_if = batadv_primary_if_get_selected(bat_priv);
@@ -1616,8 +1673,12 @@ int batadv_bla_tx(struct batadv_priv *ba
goto allow;
/* check if we are responsible. */
- if (batadv_compare_eth(claim->backbone_gw->orig,
- primary_if->net_dev->dev_addr)) {
+ backbone_gw = batadv_bla_claim_get_backbone_gw(claim);
+ client_roamed = batadv_compare_eth(backbone_gw->orig,
+ primary_if->net_dev->dev_addr);
+ batadv_backbone_gw_free_ref(backbone_gw);
+
+ if (client_roamed) {
/* if yes, the client has roamed and we have
* to unclaim it.
*/
@@ -1670,6 +1731,7 @@ int batadv_bla_claim_table_seq_print_tex
struct net_device *net_dev = (struct net_device *)seq->private;
struct batadv_priv *bat_priv = netdev_priv(net_dev);
struct batadv_hashtable *hash = bat_priv->bla.claim_hash;
+ struct batadv_bla_backbone_gw *backbone_gw;
struct batadv_bla_claim *claim;
struct batadv_hard_iface *primary_if;
struct hlist_head *head;
@@ -1694,17 +1756,21 @@ int batadv_bla_claim_table_seq_print_tex
rcu_read_lock();
hlist_for_each_entry_rcu(claim, head, hash_entry) {
- is_own = batadv_compare_eth(claim->backbone_gw->orig,
+ backbone_gw = batadv_bla_claim_get_backbone_gw(claim);
+
+ is_own = batadv_compare_eth(backbone_gw->orig,
primary_addr);
- spin_lock_bh(&claim->backbone_gw->crc_lock);
- backbone_crc = claim->backbone_gw->crc;
- spin_unlock_bh(&claim->backbone_gw->crc_lock);
+ spin_lock_bh(&backbone_gw->crc_lock);
+ backbone_crc = backbone_gw->crc;
+ spin_unlock_bh(&backbone_gw->crc_lock);
seq_printf(seq, " * %pM on %5d by %pM [%c] (%#.4x)\n",
claim->addr, BATADV_PRINT_VID(claim->vid),
- claim->backbone_gw->orig,
+ backbone_gw->orig,
(is_own ? 'x' : ' '),
backbone_crc);
+
+ batadv_backbone_gw_free_ref(backbone_gw);
}
rcu_read_unlock();
}
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -917,6 +917,7 @@ struct batadv_bla_claim {
u8 addr[ETH_ALEN];
unsigned short vid;
struct batadv_bla_backbone_gw *backbone_gw;
+ spinlock_t backbone_lock; /* protects backbone_gw */
unsigned long lasttime;
struct hlist_node hash_entry;
struct rcu_head rcu;
From: Sven Eckelmann <[email protected]>
commit 15c2ed753cd9e3e746472deab8151337a5b6da56 upstream.
The replacement of last_bonding_candidate in batadv_orig_node has to be an
atomic operation. Otherwise it is possible that the reference counter of a
batadv_orig_ifinfo is reduced which was no longer the
last_bonding_candidate when the new candidate is added. This can either
lead to an invalid memory access or to reference leaks which make it
impossible to an interface which was added to batman-adv.
Fixes: f3b3d9018975 ("batman-adv: add bonding again")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/routing.c | 52 +++++++++++++++++++++++++++++++++++------------
net/batman-adv/types.h | 4 ++-
2 files changed, 42 insertions(+), 14 deletions(-)
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -440,6 +440,29 @@ static int batadv_check_unicast_packet(s
}
/**
+ * batadv_last_bonding_replace - Replace last_bonding_candidate of orig_node
+ * @orig_node: originator node whose bonding candidates should be replaced
+ * @new_candidate: new bonding candidate or NULL
+ */
+static void
+batadv_last_bonding_replace(struct batadv_orig_node *orig_node,
+ struct batadv_orig_ifinfo *new_candidate)
+{
+ struct batadv_orig_ifinfo *old_candidate;
+
+ spin_lock_bh(&orig_node->neigh_list_lock);
+ old_candidate = orig_node->last_bonding_candidate;
+
+ if (new_candidate)
+ atomic_inc(&new_candidate->refcount);
+ orig_node->last_bonding_candidate = new_candidate;
+ spin_unlock_bh(&orig_node->neigh_list_lock);
+
+ if (old_candidate)
+ batadv_orig_ifinfo_free_ref(old_candidate);
+}
+
+/**
* batadv_find_router - find a suitable router for this originator
* @bat_priv: the bat priv with all the soft interface information
* @orig_node: the destination node
@@ -546,10 +569,6 @@ next:
}
rcu_read_unlock();
- /* last_bonding_candidate is reset below, remove the old reference. */
- if (orig_node->last_bonding_candidate)
- batadv_orig_ifinfo_free_ref(orig_node->last_bonding_candidate);
-
/* After finding candidates, handle the three cases:
* 1) there is a next candidate, use that
* 2) there is no next candidate, use the first of the list
@@ -558,21 +577,28 @@ next:
if (next_candidate) {
batadv_neigh_node_free_ref(router);
- /* remove references to first candidate, we don't need it. */
- if (first_candidate) {
- batadv_neigh_node_free_ref(first_candidate_router);
- batadv_orig_ifinfo_free_ref(first_candidate);
- }
+ atomic_inc(&next_candidate_router->refcount);
router = next_candidate_router;
- orig_node->last_bonding_candidate = next_candidate;
+ batadv_last_bonding_replace(orig_node, next_candidate);
} else if (first_candidate) {
batadv_neigh_node_free_ref(router);
- /* refcounting has already been done in the loop above. */
+ atomic_inc(&first_candidate_router->refcount);
router = first_candidate_router;
- orig_node->last_bonding_candidate = first_candidate;
+ batadv_last_bonding_replace(orig_node, first_candidate);
} else {
- orig_node->last_bonding_candidate = NULL;
+ batadv_last_bonding_replace(orig_node, NULL);
+ }
+
+ /* cleanup of candidates */
+ if (first_candidate) {
+ batadv_neigh_node_free_ref(first_candidate_router);
+ batadv_orig_ifinfo_free_ref(first_candidate);
+ }
+
+ if (next_candidate) {
+ batadv_neigh_node_free_ref(next_candidate_router);
+ batadv_orig_ifinfo_free_ref(next_candidate);
}
return router;
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -287,7 +287,9 @@ struct batadv_orig_node {
DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
u32 last_bcast_seqno;
struct hlist_head neigh_list;
- /* neigh_list_lock protects: neigh_list and router */
+ /* neigh_list_lock protects: neigh_list, ifinfo_list,
+ * last_bonding_candidate and router
+ */
spinlock_t neigh_list_lock;
struct hlist_node hash_entry;
struct batadv_priv *bat_priv;
From: Sven Eckelmann <[email protected]>
commit 60154a1e0495ffb8343a95cefe1e874634572fa8 upstream.
vlan_insert_tag can return NULL on errors. The distributed arp table code
therefore has to check the return value of vlan_insert_tag for NULL before
it can safely operate on this pointer.
Fixes: be1db4f6615b ("batman-adv: make the Distributed ARP Table vlan aware")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/distributed-arp-table.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -993,9 +993,12 @@ bool batadv_dat_snoop_outgoing_arp_reque
if (!skb_new)
goto out;
- if (vid & BATADV_VLAN_HAS_TAG)
+ if (vid & BATADV_VLAN_HAS_TAG) {
skb_new = vlan_insert_tag(skb_new, htons(ETH_P_8021Q),
vid & VLAN_VID_MASK);
+ if (!skb_new)
+ goto out;
+ }
skb_reset_mac_header(skb_new);
skb_new->protocol = eth_type_trans(skb_new,
@@ -1073,9 +1076,12 @@ bool batadv_dat_snoop_incoming_arp_reque
*/
skb_reset_mac_header(skb_new);
- if (vid & BATADV_VLAN_HAS_TAG)
+ if (vid & BATADV_VLAN_HAS_TAG) {
skb_new = vlan_insert_tag(skb_new, htons(ETH_P_8021Q),
vid & VLAN_VID_MASK);
+ if (!skb_new)
+ goto out;
+ }
/* To preserve backwards compatibility, the node has choose the outgoing
* format based on the incoming request packet type. The assumption is
From: Sven Eckelmann <[email protected]>
commit d1fe176ca51fa3cb35f70c1d876d9a090e9befce upstream.
Speedy join only works when the received packet is either broadcast or an
4addr unicast packet. Thus packets converted from broadcast to unicast via
the gateway handling code have to be converted to 4addr packets to allow
the receiving gateway server to add the sender address as temporary entry
to the translation table.
Not doing it will make the batman-adv gateway server drop the DHCP response
in many situations because it doesn't yet have the TT entry for the
destination of the DHCP response.
Fixes: 371351731e9c ("batman-adv: change interface_rx to get orig node")
Signed-off-by: Sven Eckelmann <[email protected]>
Acked-by: Antonio Quartulli <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/send.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -381,8 +381,8 @@ int batadv_send_skb_via_gw(struct batadv
struct batadv_orig_node *orig_node;
orig_node = batadv_gw_get_selected_orig(bat_priv);
- return batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST, 0,
- orig_node, vid);
+ return batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST_4ADDR,
+ BATADV_P_DATA, orig_node, vid);
}
void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface)
From: Daniel Drake <[email protected]>
commit da72a379b2ec0bad3eb265787f7008bead0b040c upstream.
VMD subdevices are created with a PCI domain ID of 0x10000 or
higher.
These subdevices are also handled like all other PCI devices by
dmar_pci_bus_notifier().
However, when dmar_alloc_pci_notify_info() take records of such devices,
it will truncate the domain ID to a u16 value (in info->seg).
The device at (e.g.) 10000:00:02.0 is then treated by the DMAR code as if
it is 0000:00:02.0.
In the unlucky event that a real device also exists at 0000:00:02.0 and
also has a device-specific entry in the DMAR table,
dmar_insert_dev_scope() will crash on:
BUG_ON(i >= devices_cnt);
That's basically a sanity check that only one PCI device matches a
single DMAR entry; in this case we seem to have two matching devices.
Fix this by ignoring devices that have a domain number higher than
what can be looked up in the DMAR table.
This problem was carefully diagnosed by Jian-Hong Pan.
Signed-off-by: Lu Baolu <[email protected]>
Signed-off-by: Daniel Drake <[email protected]>
Fixes: 59ce0515cdaf3 ("iommu/vt-d: Update DRHD/RMRR/ATSR device scope caches when PCI hotplug happens")
Signed-off-by: Joerg Roedel <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/iommu/dmar.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -39,6 +39,7 @@
#include <linux/dmi.h>
#include <linux/slab.h>
#include <linux/iommu.h>
+#include <linux/limits.h>
#include <asm/irq_remapping.h>
#include <asm/iommu_table.h>
@@ -138,6 +139,13 @@ dmar_alloc_pci_notify_info(struct pci_de
BUG_ON(dev->is_virtfn);
+ /*
+ * Ignore devices that have a domain number higher than what can
+ * be looked up in DMAR, e.g. VMD subdevices with domain 0x10000
+ */
+ if (pci_domain_nr(dev->bus) > U16_MAX)
+ return NULL;
+
/* Only generate path[] for device addition event */
if (event == BUS_NOTIFY_ADD_DEVICE)
for (tmp = dev; tmp; tmp = tmp->bus->self)
From: Sven Eckelmann <[email protected]>
commit d285f52cc0f23564fd61976d43fd5b991b4828f6 upstream.
The undefined behavior sanatizer detected an signed integer overflow in a
setup with near perfect link quality
UBSAN: Undefined behaviour in net/batman-adv/bat_iv_ogm.c:1246:25
signed integer overflow:
8713350 * 255 cannot be represented in type 'int'
The problems happens because the calculation of mixed unsigned and signed
integers resulted in an integer multiplication.
batadv_ogm_packet::tq (u8 255)
* tq_own (u8 255)
* tq_asym_penalty (int 134; max 255)
* tq_iface_penalty (int 255; max 255)
The tq_iface_penalty, tq_asym_penalty and inv_asym_penalty can just be
changed to unsigned int because they are not expected to become negative.
Fixes: c039876892e3 ("batman-adv: add WiFi penalty")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bat_iv_ogm.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -1140,9 +1140,10 @@ static int batadv_iv_ogm_calc_tq(struct
u8 total_count;
u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own;
unsigned int neigh_rq_inv_cube, neigh_rq_max_cube;
- int tq_asym_penalty, inv_asym_penalty, if_num, ret = 0;
+ int if_num, ret = 0;
+ unsigned int tq_asym_penalty, inv_asym_penalty;
unsigned int combined_tq;
- int tq_iface_penalty;
+ unsigned int tq_iface_penalty;
/* find corresponding one hop neighbor */
rcu_read_lock();
From: Sven Eckelmann <[email protected]>
commit f131a56880d10932931e74773fb8702894a94a75 upstream.
The batadv_hash_remove is a function which searches the hashtable for an
entry using a needle, a hashtable bucket selection function and a compare
function. It will lock the bucket list and delete an entry when the compare
function matches it with the needle. It returns the pointer to the
hlist_node which matches or NULL when no entry matches the needle.
The batadv_tt_global_free is not itself protected in anyway to avoid that
any other function is modifying the hashtable between the search for the
entry and the call to batadv_hash_remove. It can therefore happen that the
entry either doesn't exist anymore or an entry was deleted which is not the
same object as the needle. In such an situation, the reference counter (for
the reference stored in the hashtable) must not be reduced for the needle.
Instead the reference counter of the actually removed entry has to be
reduced.
Otherwise the reference counter will underflow and the object might be
freed before all its references were dropped. The kref helpers reported
this problem as:
refcount_t: underflow; use-after-free.
Fixes: 7683fdc1e886 ("batman-adv: protect the local and the global trans-tables with rcu")
Reported-by: Martin Weinelt <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Acked-by: Antonio Quartulli <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -508,14 +508,26 @@ static void batadv_tt_global_free(struct
struct batadv_tt_global_entry *tt_global,
const char *message)
{
+ struct batadv_tt_global_entry *tt_removed_entry;
+ struct hlist_node *tt_removed_node;
+
batadv_dbg(BATADV_DBG_TT, bat_priv,
"Deleting global tt entry %pM (vid: %d): %s\n",
tt_global->common.addr,
BATADV_PRINT_VID(tt_global->common.vid), message);
- batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt,
- batadv_choose_tt, &tt_global->common);
- batadv_tt_global_entry_free_ref(tt_global);
+ tt_removed_node = batadv_hash_remove(bat_priv->tt.global_hash,
+ batadv_compare_tt,
+ batadv_choose_tt,
+ &tt_global->common);
+ if (!tt_removed_node)
+ return;
+
+ /* drop reference of remove hash entry */
+ tt_removed_entry = hlist_entry(tt_removed_node,
+ struct batadv_tt_global_entry,
+ common.hash_entry);
+ batadv_tt_global_entry_free_ref(tt_removed_entry);
}
/**
From: Sven Eckelmann <[email protected]>
commit 36d4d68cd658d914ef73ac845705c4a89e7d9e2f upstream.
The stats are generated by batadv_interface_stats and must not be stored
directly in the net_device stats member variable. The batadv_priv
bat_counters information is assembled when ndo_get_stats is called. The
stats previously stored in net_device::stats is then overwritten.
The batman-adv counters must therefore be increased when an ARP packet is
answered locally via the distributed arp table.
Fixes: c384ea3ec930 ("batman-adv: Distributed ARP Table - add snooping functions for ARP messages")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/distributed-arp-table.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -1003,8 +1003,9 @@ bool batadv_dat_snoop_outgoing_arp_reque
skb_reset_mac_header(skb_new);
skb_new->protocol = eth_type_trans(skb_new,
bat_priv->soft_iface);
- bat_priv->stats.rx_packets++;
- bat_priv->stats.rx_bytes += skb->len + ETH_HLEN + hdr_size;
+ batadv_inc_counter(bat_priv, BATADV_CNT_RX);
+ batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
+ skb->len + ETH_HLEN + hdr_size);
bat_priv->soft_iface->last_rx = jiffies;
netif_rx(skb_new);
From: Paolo Abeni <[email protected]>
commit cccc200fcaf04cff4342036a72e51d6adf6c98c1 upstream.
Currently, if IPv6 is enabled on top of an ipvlan device in l3
mode, the following warning message:
Dropped {multi|broad}cast of type= [86dd]
is emitted every time that a RS is generated and dmseg is soon
filled with irrelevant messages. Replace pr_warn with pr_debug,
to preserve debuggability, without scaring the sysadmin.
Signed-off-by: Paolo Abeni <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/ipvlan/ipvlan_core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -432,8 +432,8 @@ static int ipvlan_process_outbound(struc
/* In this mode we dont care about multicast and broadcast traffic */
if (is_multicast_ether_addr(ethh->h_dest)) {
- pr_warn_ratelimited("Dropped {multi|broad}cast of type= [%x]\n",
- ntohs(skb->protocol));
+ pr_debug_ratelimited("Dropped {multi|broad}cast of type=[%x]\n",
+ ntohs(skb->protocol));
kfree_skb(skb);
goto out;
}
From: Sven Eckelmann <[email protected]>
commit 40e220b4218bb3d278e5e8cc04ccdfd1c7ff8307 upstream.
Each slave interface of an B.A.T.M.A.N. IV virtual interface has an OGM
packet buffer which is initialized using data from netdevice notifier and
other rtnetlink related hooks. It is sent regularly via various slave
interfaces of the batadv virtual interface and in this process also
modified (realloced) to integrate additional state information via TVLV
containers.
It must be avoided that the worker item is executed without a common lock
with the netdevice notifier/rtnetlink helpers. Otherwise it can either
happen that half modified/freed data is sent out or functions modifying the
OGM buffer try to access already freed memory regions.
Reported-by: [email protected]
Fixes: c6c8fea29769 ("net: Add batman-adv meshing protocol")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bat_iv_ogm.c | 57 +++++++++++++++++++++++++++++++++++-----
net/batman-adv/hard-interface.c | 2 +
net/batman-adv/types.h | 2 +
3 files changed, 55 insertions(+), 6 deletions(-)
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -316,14 +316,18 @@ static int batadv_iv_ogm_iface_enable(st
unsigned char *ogm_buff;
u32 random_seqno;
+ mutex_lock(&hard_iface->bat_iv.ogm_buff_mutex);
+
/* randomize initial seqno to avoid collision */
get_random_bytes(&random_seqno, sizeof(random_seqno));
atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno);
hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN;
ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC);
- if (!ogm_buff)
+ if (!ogm_buff) {
+ mutex_unlock(&hard_iface->bat_iv.ogm_buff_mutex);
return -ENOMEM;
+ }
hard_iface->bat_iv.ogm_buff = ogm_buff;
@@ -335,36 +339,60 @@ static int batadv_iv_ogm_iface_enable(st
batadv_ogm_packet->reserved = 0;
batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE;
+ mutex_unlock(&hard_iface->bat_iv.ogm_buff_mutex);
+
return 0;
}
static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface)
{
+ mutex_lock(&hard_iface->bat_iv.ogm_buff_mutex);
+
kfree(hard_iface->bat_iv.ogm_buff);
hard_iface->bat_iv.ogm_buff = NULL;
+
+ mutex_unlock(&hard_iface->bat_iv.ogm_buff_mutex);
}
static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface)
{
struct batadv_ogm_packet *batadv_ogm_packet;
- unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff;
+ void *ogm_buff;
- batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff;
+ mutex_lock(&hard_iface->bat_iv.ogm_buff_mutex);
+
+ ogm_buff = hard_iface->bat_iv.ogm_buff;
+ if (!ogm_buff)
+ goto unlock;
+
+ batadv_ogm_packet = ogm_buff;
ether_addr_copy(batadv_ogm_packet->orig,
hard_iface->net_dev->dev_addr);
ether_addr_copy(batadv_ogm_packet->prev_sender,
hard_iface->net_dev->dev_addr);
+
+unlock:
+ mutex_unlock(&hard_iface->bat_iv.ogm_buff_mutex);
}
static void
batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface)
{
struct batadv_ogm_packet *batadv_ogm_packet;
- unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff;
+ void *ogm_buff;
- batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff;
+ mutex_lock(&hard_iface->bat_iv.ogm_buff_mutex);
+
+ ogm_buff = hard_iface->bat_iv.ogm_buff;
+ if (!ogm_buff)
+ goto unlock;
+
+ batadv_ogm_packet = ogm_buff;
batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP;
batadv_ogm_packet->ttl = BATADV_TTL;
+
+unlock:
+ mutex_unlock(&hard_iface->bat_iv.ogm_buff_mutex);
}
/* when do we schedule our own ogm to be sent */
@@ -899,7 +927,11 @@ batadv_iv_ogm_slide_own_bcast_window(str
}
}
-static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface)
+/**
+ * batadv_iv_ogm_schedule_buff() - schedule submission of hardif ogm buffer
+ * @hard_iface: interface whose ogm buffer should be transmitted
+ */
+static void batadv_iv_ogm_schedule_buff(struct batadv_hard_iface *hard_iface)
{
struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff;
@@ -910,6 +942,8 @@ static void batadv_iv_ogm_schedule(struc
u16 tvlv_len = 0;
unsigned long send_time;
+ lockdep_assert_held(&hard_iface->bat_iv.ogm_buff_mutex);
+
primary_if = batadv_primary_if_get_selected(bat_priv);
if (hard_iface == primary_if) {
@@ -961,6 +995,17 @@ out:
batadv_hardif_free_ref(primary_if);
}
+static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface)
+{
+ if (hard_iface->if_status == BATADV_IF_NOT_IN_USE ||
+ hard_iface->if_status == BATADV_IF_TO_BE_REMOVED)
+ return;
+
+ mutex_lock(&hard_iface->bat_iv.ogm_buff_mutex);
+ batadv_iv_ogm_schedule_buff(hard_iface);
+ mutex_unlock(&hard_iface->bat_iv.ogm_buff_mutex);
+}
+
/**
* batadv_iv_ogm_orig_update - use OGM to update corresponding data in an
* originator
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -26,6 +26,7 @@
#include <linux/if.h>
#include <linux/kernel.h>
#include <linux/list.h>
+#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/printk.h>
#include <linux/rculist.h>
@@ -671,6 +672,7 @@ batadv_hardif_add_interface(struct net_d
goto free_sysfs;
INIT_LIST_HEAD(&hard_iface->list);
+ mutex_init(&hard_iface->bat_iv.ogm_buff_mutex);
INIT_WORK(&hard_iface->cleanup_work,
batadv_hardif_remove_interface_finish);
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -77,11 +77,13 @@ enum batadv_dhcp_recipient {
* @ogm_buff: buffer holding the OGM packet
* @ogm_buff_len: length of the OGM packet buffer
* @ogm_seqno: OGM sequence number - used to identify each OGM
+ * @ogm_buff_mutex: lock protecting ogm_buff and ogm_buff_len
*/
struct batadv_hard_iface_bat_iv {
unsigned char *ogm_buff;
int ogm_buff_len;
atomic_t ogm_seqno;
+ struct mutex ogm_buff_mutex;
};
/**
From: Sven Eckelmann <[email protected]>
commit f2d23861b818d08bcd15cc1612ae94aa33b3931c upstream.
The shutdown of an batman-adv interface can happen with one of its slave
interfaces still being in the BATADV_IF_TO_BE_ACTIVATED state. A possible
reason for it is that the routing algorithm BATMAN_V was selected and
batadv_schedule_bat_ogm was not yet called for this interface. This slave
interface still has to be set to BATADV_IF_INACTIVE or the batman-adv
interface will never reduce its usage counter and thus never gets shutdown.
This problem can be simulated via:
$ modprobe dummy
$ modprobe batman-adv routing_algo=BATMAN_V
$ ip link add bat0 type batadv
$ ip link set dummy0 master bat0
$ ip link set dummy0 up
$ ip link del bat0
unregister_netdevice: waiting for bat0 to become free. Usage count = 3
Reported-by: Matthias Schiffer <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/hard-interface.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -562,8 +562,7 @@ void batadv_hardif_disable_interface(str
struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
struct batadv_hard_iface *primary_if = NULL;
- if (hard_iface->if_status == BATADV_IF_ACTIVE)
- batadv_hardif_deactivate_interface(hard_iface);
+ batadv_hardif_deactivate_interface(hard_iface);
if (hard_iface->if_status != BATADV_IF_INACTIVE)
goto out;
From: Sven Eckelmann <[email protected]>
commit 936523441bb64cdc9a5b263e8fd2782e70313a57 upstream.
batadv_find_router dereferences last_bonding_candidate from
orig_node without making sure that it has a valid reference. This reference
has to be retrieved by increasing the reference counter while holding
neigh_list_lock. The lock is required to avoid that
batadv_last_bonding_replace removes the current last_bonding_candidate,
reduces the reference counter and maybe destroys the object in this
process.
Fixes: f3b3d9018975 ("batman-adv: add bonding again")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/routing.c | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -440,6 +440,29 @@ static int batadv_check_unicast_packet(s
}
/**
+ * batadv_last_bonding_get - Get last_bonding_candidate of orig_node
+ * @orig_node: originator node whose last bonding candidate should be retrieved
+ *
+ * Return: last bonding candidate of router or NULL if not found
+ *
+ * The object is returned with refcounter increased by 1.
+ */
+static struct batadv_orig_ifinfo *
+batadv_last_bonding_get(struct batadv_orig_node *orig_node)
+{
+ struct batadv_orig_ifinfo *last_bonding_candidate;
+
+ spin_lock_bh(&orig_node->neigh_list_lock);
+ last_bonding_candidate = orig_node->last_bonding_candidate;
+
+ if (last_bonding_candidate)
+ atomic_inc(&last_bonding_candidate->refcount);
+ spin_unlock_bh(&orig_node->neigh_list_lock);
+
+ return last_bonding_candidate;
+}
+
+/**
* batadv_last_bonding_replace - Replace last_bonding_candidate of orig_node
* @orig_node: originator node whose bonding candidates should be replaced
* @new_candidate: new bonding candidate or NULL
@@ -509,7 +532,7 @@ batadv_find_router(struct batadv_priv *b
* router - obviously there are no other candidates.
*/
rcu_read_lock();
- last_candidate = orig_node->last_bonding_candidate;
+ last_candidate = batadv_last_bonding_get(orig_node);
if (last_candidate)
last_cand_router = rcu_dereference(last_candidate->router);
@@ -601,6 +624,9 @@ next:
batadv_orig_ifinfo_free_ref(next_candidate);
}
+ if (last_candidate)
+ batadv_orig_ifinfo_free_ref(last_candidate);
+
return router;
}
From: Sven Eckelmann <[email protected]>
A transmission scheduling for an interface which is currently dropped by
batadv_iv_ogm_iface_disable could still be in progress. The B.A.T.M.A.N. V
is simply cancelling the workqueue item in an synchronous way but this is
not possible with B.A.T.M.A.N. IV because the OGM submissions are
intertwined.
Instead it has to stop submitting the OGM when it detect that the buffer
pointer is set to NULL.
Reported-by: [email protected]
Reported-by: [email protected]
Fixes: c6c8fea29769 ("net: Add batman-adv meshing protocol")
Signed-off-by: Sven Eckelmann <[email protected]>
Cc: Hillf Danton <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bat_iv_ogm.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -944,6 +944,10 @@ static void batadv_iv_ogm_schedule_buff(
lockdep_assert_held(&hard_iface->bat_iv.ogm_buff_mutex);
+ /* interface already disabled by batadv_iv_ogm_iface_disable */
+ if (!*ogm_buff)
+ return;
+
primary_if = batadv_primary_if_get_selected(bat_priv);
if (hard_iface == primary_if) {
From: Sven Eckelmann <[email protected]>
commit a33d970d0b54b09746d5540af8271fad4eb10229 upstream.
The batadv_tt_local_entry was specific to a batadv_softif_vlan and held an
implicit reference to it. But this reference was never stored in form of a
pointer in the tt_local_entry itself. Instead batadv_tt_local_remove,
batadv_tt_local_table_free and batadv_tt_local_purge_pending_clients depend
on a consistent state of bat_priv->softif_vlan_list and that
batadv_softif_vlan_get always returns the batadv_softif_vlan object which
it has a reference for. But batadv_softif_vlan_get cannot guarantee that
because it is working only with rcu_read_lock on this list. It can
therefore happen that an vid is in this list twice or that
batadv_softif_vlan_get cannot find the batadv_softif_vlan for an vid due to
some other list operations taking place at the same time.
Instead add a batadv_softif_vlan pointer directly in batadv_tt_local_entry
which will be used for the reference counter decremented on release of
batadv_tt_local_entry.
Fixes: 35df3b298fc8 ("batman-adv: fix TT VLAN inconsistency on VLAN re-add")
Signed-off-by: Sven Eckelmann <[email protected]>
Acked-by: Antonio Quartulli <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 44 ++++---------------------------------
net/batman-adv/types.h | 2 +
2 files changed, 7 insertions(+), 39 deletions(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -197,8 +197,11 @@ batadv_tt_global_hash_find(struct batadv
static void
batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry)
{
- if (atomic_dec_and_test(&tt_local_entry->common.refcount))
+ if (atomic_dec_and_test(&tt_local_entry->common.refcount)) {
+ batadv_softif_vlan_free_ref(tt_local_entry->vlan);
+
kfree_rcu(tt_local_entry, common.rcu);
+ }
}
/**
@@ -638,7 +641,6 @@ bool batadv_tt_local_add(struct net_devi
if (unlikely(hash_added != 0)) {
/* remove the reference for the hash */
batadv_tt_local_entry_free_ref(tt_local);
- batadv_softif_vlan_free_ref(vlan);
goto out;
}
@@ -942,7 +944,6 @@ int batadv_tt_local_seq_print_text(struc
struct batadv_tt_common_entry *tt_common_entry;
struct batadv_tt_local_entry *tt_local;
struct batadv_hard_iface *primary_if;
- struct batadv_softif_vlan *vlan;
struct hlist_head *head;
unsigned short vid;
u32 i;
@@ -979,13 +980,6 @@ int batadv_tt_local_seq_print_text(struc
no_purge = tt_common_entry->flags & np_flag;
- vlan = batadv_softif_vlan_get(bat_priv, vid);
- if (!vlan) {
- seq_printf(seq, "Cannot retrieve VLAN %d\n",
- BATADV_PRINT_VID(vid));
- continue;
- }
-
seq_printf(seq,
" * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n",
tt_common_entry->addr,
@@ -1003,9 +997,7 @@ int batadv_tt_local_seq_print_text(struc
BATADV_TT_CLIENT_ISOLA) ? 'I' : '.'),
no_purge ? 0 : last_seen_secs,
no_purge ? 0 : last_seen_msecs,
- vlan->tt.crc);
-
- batadv_softif_vlan_free_ref(vlan);
+ tt_local->vlan->tt.crc);
}
rcu_read_unlock();
}
@@ -1050,7 +1042,6 @@ u16 batadv_tt_local_remove(struct batadv
{
struct batadv_tt_local_entry *tt_local_entry;
u16 flags, curr_flags = BATADV_NO_FLAGS;
- struct batadv_softif_vlan *vlan;
void *tt_entry_exists;
tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
@@ -1090,14 +1081,6 @@ u16 batadv_tt_local_remove(struct batadv
/* extra call to free the local tt entry */
batadv_tt_local_entry_free_ref(tt_local_entry);
- /* decrease the reference held for this vlan */
- vlan = batadv_softif_vlan_get(bat_priv, vid);
- if (!vlan)
- goto out;
-
- batadv_softif_vlan_free_ref(vlan);
- batadv_softif_vlan_free_ref(vlan);
-
out:
if (tt_local_entry)
batadv_tt_local_entry_free_ref(tt_local_entry);
@@ -1170,7 +1153,6 @@ static void batadv_tt_local_table_free(s
spinlock_t *list_lock; /* protects write access to the hash lists */
struct batadv_tt_common_entry *tt_common_entry;
struct batadv_tt_local_entry *tt_local;
- struct batadv_softif_vlan *vlan;
struct hlist_node *node_tmp;
struct hlist_head *head;
u32 i;
@@ -1192,14 +1174,6 @@ static void batadv_tt_local_table_free(s
struct batadv_tt_local_entry,
common);
- /* decrease the reference held for this vlan */
- vlan = batadv_softif_vlan_get(bat_priv,
- tt_common_entry->vid);
- if (vlan) {
- batadv_softif_vlan_free_ref(vlan);
- batadv_softif_vlan_free_ref(vlan);
- }
-
batadv_tt_local_entry_free_ref(tt_local);
}
spin_unlock_bh(list_lock);
@@ -3229,7 +3203,6 @@ static void batadv_tt_local_purge_pendin
struct batadv_hashtable *hash = bat_priv->tt.local_hash;
struct batadv_tt_common_entry *tt_common;
struct batadv_tt_local_entry *tt_local;
- struct batadv_softif_vlan *vlan;
struct hlist_node *node_tmp;
struct hlist_head *head;
spinlock_t *list_lock; /* protects write access to the hash lists */
@@ -3259,13 +3232,6 @@ static void batadv_tt_local_purge_pendin
struct batadv_tt_local_entry,
common);
- /* decrease the reference held for this vlan */
- vlan = batadv_softif_vlan_get(bat_priv, tt_common->vid);
- if (vlan) {
- batadv_softif_vlan_free_ref(vlan);
- batadv_softif_vlan_free_ref(vlan);
- }
-
batadv_tt_local_entry_free_ref(tt_local);
}
spin_unlock_bh(list_lock);
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -947,10 +947,12 @@ struct batadv_tt_common_entry {
* struct batadv_tt_local_entry - translation table local entry data
* @common: general translation table data
* @last_seen: timestamp used for purging stale tt local entries
+ * @vlan: soft-interface vlan of the entry
*/
struct batadv_tt_local_entry {
struct batadv_tt_common_entry common;
unsigned long last_seen;
+ struct batadv_softif_vlan *vlan;
};
/**
From: Eric Dumazet <[email protected]>
commit b7469e83d2add567e4e0b063963db185f3167cea upstream.
Similar to commit 38f88c454042 ("bonding/alb: properly access headers
in bond_alb_xmit()"), we need to make sure arp header was pulled
in skb->head before blindly accessing it in rlb_arp_xmit().
Remove arp_pkt() private helper, since it is more readable/obvious
to have the following construct back to back :
if (!pskb_network_may_pull(skb, sizeof(*arp)))
return NULL;
arp = (struct arp_pkt *)skb_network_header(skb);
syzbot reported :
BUG: KMSAN: uninit-value in bond_slave_has_mac_rx include/net/bonding.h:704 [inline]
BUG: KMSAN: uninit-value in rlb_arp_xmit drivers/net/bonding/bond_alb.c:662 [inline]
BUG: KMSAN: uninit-value in bond_alb_xmit+0x575/0x25e0 drivers/net/bonding/bond_alb.c:1477
CPU: 0 PID: 12743 Comm: syz-executor.4 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x220 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
bond_slave_has_mac_rx include/net/bonding.h:704 [inline]
rlb_arp_xmit drivers/net/bonding/bond_alb.c:662 [inline]
bond_alb_xmit+0x575/0x25e0 drivers/net/bonding/bond_alb.c:1477
__bond_start_xmit drivers/net/bonding/bond_main.c:4257 [inline]
bond_start_xmit+0x85d/0x2f70 drivers/net/bonding/bond_main.c:4282
__netdev_start_xmit include/linux/netdevice.h:4524 [inline]
netdev_start_xmit include/linux/netdevice.h:4538 [inline]
xmit_one net/core/dev.c:3470 [inline]
dev_hard_start_xmit+0x531/0xab0 net/core/dev.c:3486
__dev_queue_xmit+0x37de/0x4220 net/core/dev.c:4063
dev_queue_xmit+0x4b/0x60 net/core/dev.c:4096
packet_snd net/packet/af_packet.c:2967 [inline]
packet_sendmsg+0x8347/0x93b0 net/packet/af_packet.c:2992
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg net/socket.c:672 [inline]
__sys_sendto+0xc1b/0xc50 net/socket.c:1998
__do_sys_sendto net/socket.c:2010 [inline]
__se_sys_sendto+0x107/0x130 net/socket.c:2006
__x64_sys_sendto+0x6e/0x90 net/socket.c:2006
do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c479
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc77ffbbc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fc77ffbc6d4 RCX: 000000000045c479
RDX: 000000000000000e RSI: 00000000200004c0 RDI: 0000000000000003
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a04 R14: 00000000004cc7b0 R15: 000000000076bf2c
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127
kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:82
slab_alloc_node mm/slub.c:2793 [inline]
__kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4401
__kmalloc_reserve net/core/skbuff.c:142 [inline]
__alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1051 [inline]
alloc_skb_with_frags+0x18c/0xa70 net/core/skbuff.c:5766
sock_alloc_send_pskb+0xada/0xc60 net/core/sock.c:2242
packet_alloc_skb net/packet/af_packet.c:2815 [inline]
packet_snd net/packet/af_packet.c:2910 [inline]
packet_sendmsg+0x66a0/0x93b0 net/packet/af_packet.c:2992
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg net/socket.c:672 [inline]
__sys_sendto+0xc1b/0xc50 net/socket.c:1998
__do_sys_sendto net/socket.c:2010 [inline]
__se_sys_sendto+0x107/0x130 net/socket.c:2006
__x64_sys_sendto+0x6e/0x90 net/socket.c:2006
do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <[email protected]>
Reported-by: syzbot <[email protected]>
Cc: Jay Vosburgh <[email protected]>
Cc: Veaceslav Falico <[email protected]>
Cc: Andy Gospodarek <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/bonding/bond_alb.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -74,11 +74,6 @@ struct arp_pkt {
};
#pragma pack()
-static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb)
-{
- return (struct arp_pkt *)skb_network_header(skb);
-}
-
/* Forward declaration */
static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[],
bool strict_match);
@@ -577,10 +572,11 @@ static void rlb_req_update_subnet_client
spin_unlock(&bond->mode_lock);
}
-static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond)
+static struct slave *rlb_choose_channel(struct sk_buff *skb,
+ struct bonding *bond,
+ const struct arp_pkt *arp)
{
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
- struct arp_pkt *arp = arp_pkt(skb);
struct slave *assigned_slave, *curr_active_slave;
struct rlb_client_info *client_info;
u32 hash_index = 0;
@@ -677,8 +673,12 @@ static struct slave *rlb_choose_channel(
*/
static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond)
{
- struct arp_pkt *arp = arp_pkt(skb);
struct slave *tx_slave = NULL;
+ struct arp_pkt *arp;
+
+ if (!pskb_network_may_pull(skb, sizeof(*arp)))
+ return NULL;
+ arp = (struct arp_pkt *)skb_network_header(skb);
/* Don't modify or load balance ARPs that do not originate locally
* (e.g.,arrive via a bridge).
@@ -688,7 +688,7 @@ static struct slave *rlb_arp_xmit(struct
if (arp->op_code == htons(ARPOP_REPLY)) {
/* the arp must be sent on the selected rx channel */
- tx_slave = rlb_choose_channel(skb, bond);
+ tx_slave = rlb_choose_channel(skb, bond, arp);
if (tx_slave)
ether_addr_copy(arp->mac_src, tx_slave->dev->dev_addr);
netdev_dbg(bond->dev, "Server sent ARP Reply packet\n");
@@ -698,7 +698,7 @@ static struct slave *rlb_arp_xmit(struct
* When the arp reply is received the entry will be updated
* with the correct unicast address of the client.
*/
- rlb_choose_channel(skb, bond);
+ rlb_choose_channel(skb, bond, arp);
/* The ARP reply packets must be delayed so that
* they can cancel out the influence of the ARP request.
From: Andrew Lunn <[email protected]>
commit 1bc4e2b000e7fa9773d6623bc8850561ce10a4fb upstream.
batman-adv checks in different situation if a new device is already on top
of a different batman-adv device. This is done by getting the iflink of a
device and all its parent. It assumes that this iflink is always a parent
device in an acyclic graph. But this assumption is broken by devices like
veth which are actually a pair of two devices linked to each other. The
recursive check would therefore get veth0 when calling dev_get_iflink on
veth1. And it gets veth0 when calling dev_get_iflink with veth1.
Creating a veth pair and loading batman-adv freezes parts of the system
ip link add veth0 type veth peer name veth1
modprobe batman-adv
An RCU stall will be detected on the system which cannot be fixed.
INFO: rcu_sched self-detected stall on CPU
1: (5264 ticks this GP) idle=3e9/140000000000001/0
softirq=144683/144686 fqs=5249
(t=5250 jiffies g=46 c=45 q=43)
Task dump for CPU 1:
insmod R running task 0 247 245 0x00000008
ffffffff8151f140 ffffffff8107888e ffff88000fd141c0 ffffffff8151f140
0000000000000000 ffffffff81552df0 ffffffff8107b420 0000000000000001
ffff88000e3fa700 ffffffff81540b00 ffffffff8107d667 0000000000000001
Call Trace:
<IRQ> [<ffffffff8107888e>] ? rcu_dump_cpu_stacks+0x7e/0xd0
[<ffffffff8107b420>] ? rcu_check_callbacks+0x3f0/0x6b0
[<ffffffff8107d667>] ? hrtimer_run_queues+0x47/0x180
[<ffffffff8107cf9d>] ? update_process_times+0x2d/0x50
[<ffffffff810873fb>] ? tick_handle_periodic+0x1b/0x60
[<ffffffff810290ae>] ? smp_trace_apic_timer_interrupt+0x5e/0x90
[<ffffffff813bbae2>] ? apic_timer_interrupt+0x82/0x90
<EOI> [<ffffffff812c3fd7>] ? __dev_get_by_index+0x37/0x40
[<ffffffffa0031f3e>] ? batadv_hard_if_event+0xee/0x3a0 [batman_adv]
[<ffffffff812c5801>] ? register_netdevice_notifier+0x81/0x1a0
[...]
This can be avoided by checking if two devices are each others parent and
stopping the check in this situation.
Fixes: b7eddd0b3950 ("batman-adv: prevent using any virtual device created on batman-adv as hard-interface")
Signed-off-by: Andrew Lunn <[email protected]>
[[email protected]: rewritten description, extracted fix]
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/hard-interface.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -74,6 +74,28 @@ out:
}
/**
+ * batadv_mutual_parents - check if two devices are each others parent
+ * @dev1: 1st net_device
+ * @dev2: 2nd net_device
+ *
+ * veth devices come in pairs and each is the parent of the other!
+ *
+ * Return: true if the devices are each others parent, otherwise false
+ */
+static bool batadv_mutual_parents(const struct net_device *dev1,
+ const struct net_device *dev2)
+{
+ int dev1_parent_iflink = dev_get_iflink(dev1);
+ int dev2_parent_iflink = dev_get_iflink(dev2);
+
+ if (!dev1_parent_iflink || !dev2_parent_iflink)
+ return false;
+
+ return (dev1_parent_iflink == dev2->ifindex) &&
+ (dev2_parent_iflink == dev1->ifindex);
+}
+
+/**
* batadv_is_on_batman_iface - check if a device is a batman iface descendant
* @net_dev: the device to check
*
@@ -108,6 +130,9 @@ static bool batadv_is_on_batman_iface(co
return false;
}
+ if (batadv_mutual_parents(net_dev, parent_dev))
+ return false;
+
ret = batadv_is_on_batman_iface(parent_dev);
return ret;
From: Sven Eckelmann <[email protected]>
commit 33fbb1f3db87ce53da925b3e034b4dd446d483f8 upstream.
batadv_orig_node_new uses batadv_orig_node_vlan_new to allocate a new
batadv_orig_node_vlan and add it to batadv_orig_node::vlan_list. References
to this list have also to be cleaned when the batadv_orig_node is removed.
Fixes: 7ea7b4a14275 ("batman-adv: make the TT CRC logic VLAN specific")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/originator.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -564,6 +564,7 @@ static void batadv_orig_node_release(str
struct hlist_node *node_tmp;
struct batadv_neigh_node *neigh_node;
struct batadv_orig_ifinfo *orig_ifinfo;
+ struct batadv_orig_node_vlan *vlan;
spin_lock_bh(&orig_node->neigh_list_lock);
@@ -581,6 +582,13 @@ static void batadv_orig_node_release(str
}
spin_unlock_bh(&orig_node->neigh_list_lock);
+ spin_lock_bh(&orig_node->vlan_list_lock);
+ hlist_for_each_entry_safe(vlan, node_tmp, &orig_node->vlan_list, list) {
+ hlist_del_rcu(&vlan->list);
+ batadv_orig_node_vlan_free_ref(vlan);
+ }
+ spin_unlock_bh(&orig_node->vlan_list_lock);
+
/* Free nc_nodes */
batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL);
From: Florian Fainelli <[email protected]>
commit 45939ce292b4b11159719faaf60aba7d58d5fe33 upstream.
It is possible for a system with an ARMv8 timer to run a 32-bit kernel.
When this happens we will unconditionally have the vDSO code remove the
__vdso_gettimeofday and __vdso_clock_gettime symbols because
cntvct_functional() returns false since it does not match that
compatibility string.
Fixes: ecf99a439105 ("ARM: 8331/1: VDSO initialization, mapping, and synchronization")
Signed-off-by: Florian Fainelli <[email protected]>
Signed-off-by: Russell King <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arm/kernel/vdso.c | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/arm/kernel/vdso.c
+++ b/arch/arm/kernel/vdso.c
@@ -85,6 +85,8 @@ static bool __init cntvct_functional(voi
*/
np = of_find_compatible_node(NULL, NULL, "arm,armv7-timer");
if (!np)
+ np = of_find_compatible_node(NULL, NULL, "arm,armv8-timer");
+ if (!np)
goto out_put;
if (of_property_read_bool(np, "arm,cpu-registers-not-fw-configured"))
From: Sven Eckelmann <[email protected]>
commit c18bdd018e8912ca73ad6c12120b7283b5038875 upstream.
The batadv_gw_node reference counter in batadv_gw_node_update can only be
reduced when the list entry was actually removed. Otherwise the reference
counter may reach zero when batadv_gw_node_update is called from two
different contexts for the same gw_node but only one context is actually
removing the entry from the list.
The release function for this gw_node is not called inside the list_lock
spinlock protected region because the function batadv_gw_node_update still
holds a gw_node reference for the object pointer on the stack. Thus the
actual release function (when required) will be called only at the end of
the function.
Fixes: bd3524c14bd0 ("batman-adv: remove obsolete deleted attribute for gateway node")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/gateway_client.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -527,11 +527,12 @@ void batadv_gw_node_update(struct batadv
* gets dereferenced.
*/
spin_lock_bh(&bat_priv->gw.list_lock);
- hlist_del_init_rcu(&gw_node->list);
+ if (!hlist_unhashed(&gw_node->list)) {
+ hlist_del_init_rcu(&gw_node->list);
+ batadv_gw_node_free_ref(gw_node);
+ }
spin_unlock_bh(&bat_priv->gw.list_lock);
- batadv_gw_node_free_ref(gw_node);
-
curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
if (gw_node == curr_gw)
batadv_gw_reselect(bat_priv);
From: Sven Eckelmann <[email protected]>
commit f22e08932c2960f29b5e828e745c9f3fb7c1bb86 upstream.
batman-adv uses internal indices for each enabled and active interface.
It is currently used by the B.A.T.M.A.N. IV algorithm to identifify the
correct position in the ogm_cnt bitmaps.
The type for the number of enabled interfaces (which defines the next
interface index) was set to char. This type can be (depending on the
architecture) either signed (limiting batman-adv to 127 active slave
interfaces) or unsigned (limiting batman-adv to 255 active slave
interfaces).
This limit was not correctly checked when an interface was enabled and thus
an overflow happened. This was only catched on systems with the signed char
type when the B.A.T.M.A.N. IV code tried to resize its counter arrays with
a negative size.
The if_num interface index was only a s16 and therefore significantly
smaller than the ifindex (int) used by the code net code.
Both &batadv_hard_iface->if_num and &batadv_priv->num_ifaces must be
(unsigned) int to support the same number of slave interfaces as the net
core code. And the interface activation code must check the number of
active slave interfaces to avoid integer overflows.
Fixes: c6c8fea29769 ("net: Add batman-adv meshing protocol")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bat_iv_ogm.c | 16 +++++++++-------
net/batman-adv/hard-interface.c | 9 +++++++--
net/batman-adv/originator.c | 4 ++--
net/batman-adv/originator.h | 4 ++--
net/batman-adv/types.h | 8 ++++----
5 files changed, 24 insertions(+), 17 deletions(-)
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -135,7 +135,7 @@ static void batadv_iv_ogm_orig_free(stru
* Returns 0 on success, a negative error code otherwise.
*/
static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node,
- int max_if_num)
+ unsigned int max_if_num)
{
void *data_ptr;
size_t old_size;
@@ -181,7 +181,8 @@ unlock:
* Returns 0 on success, a negative error code otherwise.
*/
static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node,
- int max_if_num, int del_if_num)
+ unsigned int max_if_num,
+ unsigned int del_if_num)
{
int ret = -ENOMEM;
size_t chunk_size, if_offset;
@@ -252,7 +253,8 @@ static struct batadv_orig_node *
batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr)
{
struct batadv_orig_node *orig_node;
- int size, hash_added;
+ int hash_added;
+ size_t size;
orig_node = batadv_orig_hash_find(bat_priv, addr);
if (orig_node)
@@ -871,7 +873,7 @@ batadv_iv_ogm_slide_own_bcast_window(str
u32 i;
size_t word_index;
u8 *w;
- int if_num;
+ unsigned int if_num;
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
@@ -982,7 +984,7 @@ batadv_iv_ogm_orig_update(struct batadv_
struct batadv_neigh_node *tmp_neigh_node = NULL;
struct batadv_neigh_node *router = NULL;
struct batadv_orig_node *orig_node_tmp;
- int if_num;
+ unsigned int if_num;
u8 sum_orig, sum_neigh;
u8 *neigh_addr;
u8 tq_avg;
@@ -1647,9 +1649,9 @@ static void batadv_iv_ogm_process(const
if (is_my_orig) {
unsigned long *word;
- int offset;
+ size_t offset;
s32 bit_pos;
- s16 if_num;
+ unsigned int if_num;
u8 *weight;
orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv,
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -493,6 +493,11 @@ int batadv_hardif_enable_interface(struc
hard_iface->soft_iface = soft_iface;
bat_priv = netdev_priv(hard_iface->soft_iface);
+ if (bat_priv->num_ifaces >= UINT_MAX) {
+ ret = -ENOSPC;
+ goto err_dev;
+ }
+
ret = netdev_master_upper_dev_link(hard_iface->net_dev, soft_iface);
if (ret)
goto err_dev;
@@ -600,7 +605,7 @@ void batadv_hardif_disable_interface(str
batadv_hardif_recalc_extra_skbroom(hard_iface->soft_iface);
/* nobody uses this interface anymore */
- if (!bat_priv->num_ifaces) {
+ if (bat_priv->num_ifaces == 0) {
batadv_gw_check_client_stop(bat_priv);
if (autodel == BATADV_IF_CLEANUP_AUTO)
@@ -656,7 +661,7 @@ batadv_hardif_add_interface(struct net_d
if (ret)
goto free_if;
- hard_iface->if_num = -1;
+ hard_iface->if_num = 0;
hard_iface->net_dev = net_dev;
hard_iface->soft_iface = NULL;
hard_iface->if_status = BATADV_IF_NOT_IN_USE;
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -1103,7 +1103,7 @@ out:
}
int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
- int max_if_num)
+ unsigned int max_if_num)
{
struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
struct batadv_algo_ops *bao = bat_priv->bat_algo_ops;
@@ -1139,7 +1139,7 @@ err:
}
int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
- int max_if_num)
+ unsigned int max_if_num)
{
struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
struct batadv_hashtable *hash = bat_priv->orig_hash;
--- a/net/batman-adv/originator.h
+++ b/net/batman-adv/originator.h
@@ -67,9 +67,9 @@ void batadv_orig_ifinfo_free_ref(struct
int batadv_orig_seq_print_text(struct seq_file *seq, void *offset);
int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset);
int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
- int max_if_num);
+ unsigned int max_if_num);
int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
- int max_if_num);
+ unsigned int max_if_num);
struct batadv_orig_node_vlan *
batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node,
unsigned short vid);
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -103,7 +103,7 @@ struct batadv_hard_iface_bat_iv {
*/
struct batadv_hard_iface {
struct list_head list;
- s16 if_num;
+ unsigned int if_num;
char if_status;
struct net_device *net_dev;
u8 num_bcasts;
@@ -808,7 +808,7 @@ struct batadv_priv {
atomic_t bcast_seqno;
atomic_t bcast_queue_left;
atomic_t batman_queue_left;
- char num_ifaces;
+ unsigned int num_ifaces;
struct kobject *mesh_obj;
struct dentry *debug_dir;
struct hlist_head forw_bat_list;
@@ -1179,9 +1179,9 @@ struct batadv_algo_ops {
struct batadv_hard_iface *hard_iface);
void (*bat_orig_free)(struct batadv_orig_node *orig_node);
int (*bat_orig_add_if)(struct batadv_orig_node *orig_node,
- int max_if_num);
+ unsigned int max_if_num);
int (*bat_orig_del_if)(struct batadv_orig_node *orig_node,
- int max_if_num, int del_if_num);
+ unsigned int max_if_num, unsigned int del_if_num);
};
/**
From: Linus L?ssing <[email protected]>
commit 4a519b83da16927fb98fd32b0f598e639d1f1859 upstream.
Since commit 54e22f265e87 ("batman-adv: fix TT sync flag inconsistencies")
TT sync flags and TT non-sync'd flags are supposed to be stored
separately.
The previous patch missed to apply this separation on a TT entry with
only a single TT orig entry.
This is a minor fix because with only a single TT orig entry the DDoS
issue the former patch solves does not apply.
Fixes: 54e22f265e87 ("batman-adv: fix TT sync flag inconsistencies")
Signed-off-by: Linus L?ssing <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1405,7 +1405,8 @@ static bool batadv_tt_global_add(struct
ether_addr_copy(common->addr, tt_addr);
common->vid = vid;
- common->flags = flags;
+ common->flags = flags & (~BATADV_TT_SYNC_MASK);
+
tt_global_entry->roam_at = 0;
/* node must store current time in case of roaming. This is
* needed to purge this entry out on timeout (if nobody claims
From: Sven Eckelmann <[email protected]>
commit e7136e48ffdfb9f37b0820f619380485eb407361 upstream.
The function batadv_tt_global_orig_entry_add is responsible for adding new
tt_orig_list_entry to the orig_list. It first checks whether the entry
already is in the list or not. If it is, then the creation of a new entry
is aborted.
But the lock for the list is only held when the list is really modified.
This could lead to duplicated entries because another context could create
an entry with the same key between the check and the list manipulation.
The check and the manipulation of the list must therefore be in the same
locked code section.
Fixes: d657e621a0f5 ("batman-adv: add reference counting for type batadv_tt_orig_list_entry")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1315,6 +1315,8 @@ batadv_tt_global_orig_entry_add(struct b
{
struct batadv_tt_orig_list_entry *orig_entry;
+ spin_lock_bh(&tt_global->list_lock);
+
orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node);
if (orig_entry) {
/* refresh the ttvn: the current value could be a bogus one that
@@ -1337,10 +1339,8 @@ batadv_tt_global_orig_entry_add(struct b
orig_entry->flags = flags;
atomic_set(&orig_entry->refcount, 2);
- spin_lock_bh(&tt_global->list_lock);
hlist_add_head_rcu(&orig_entry->list,
&tt_global->orig_list);
- spin_unlock_bh(&tt_global->list_lock);
atomic_inc(&tt_global->orig_list_count);
sync_flags:
@@ -1348,6 +1348,8 @@ sync_flags:
out:
if (orig_entry)
batadv_tt_orig_list_entry_free_ref(orig_entry);
+
+ spin_unlock_bh(&tt_global->list_lock);
}
/**
From: Sven Eckelmann <[email protected]>
commit ae3cdc97dc10c7a3b31f297dab429bfb774c9ccb upstream.
The function batadv_tvlv_handler_register is responsible for adding new
tvlv_handler to the handler_list. It first checks whether the entry
already is in the list or not. If it is, then the creation of a new entry
is aborted.
But the lock for the list is only held when the list is really modified.
This could lead to duplicated entries because another context could create
an entry with the same key between the check and the list manipulation.
The check and the manipulation of the list must therefore be in the same
locked code section.
Fixes: ef26157747d4 ("batman-adv: tvlv - basic infrastructure")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/main.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -1079,15 +1079,20 @@ void batadv_tvlv_handler_register(struct
{
struct batadv_tvlv_handler *tvlv_handler;
+ spin_lock_bh(&bat_priv->tvlv.handler_list_lock);
+
tvlv_handler = batadv_tvlv_handler_get(bat_priv, type, version);
if (tvlv_handler) {
+ spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
batadv_tvlv_handler_free_ref(tvlv_handler);
return;
}
tvlv_handler = kzalloc(sizeof(*tvlv_handler), GFP_ATOMIC);
- if (!tvlv_handler)
+ if (!tvlv_handler) {
+ spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
return;
+ }
tvlv_handler->ogm_handler = optr;
tvlv_handler->unicast_handler = uptr;
@@ -1097,7 +1102,6 @@ void batadv_tvlv_handler_register(struct
atomic_set(&tvlv_handler->refcount, 1);
INIT_HLIST_NODE(&tvlv_handler->list);
- spin_lock_bh(&bat_priv->tvlv.handler_list_lock);
hlist_add_head_rcu(&tvlv_handler->list, &bat_priv->tvlv.handler_list);
spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);
}
From: Matteo Croce <[email protected]>
commit 3e72dfdf8227b052393f71d820ec7599909dddc2 upstream.
Similarly to commit c543cb4a5f07 ("ipv4: ensure rcu_read_lock() in
ipv4_link_failure()"), __ip_options_compile() must be called under rcu
protection.
Fixes: 3da1ed7ac398 ("net: avoid use IPCB in cipso_v4_error")
Suggested-by: Guillaume Nault <[email protected]>
Signed-off-by: Matteo Croce <[email protected]>
Acked-by: Paul Moore <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/ipv4/cipso_ipv4.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -1809,6 +1809,7 @@ void cipso_v4_error(struct sk_buff *skb,
{
unsigned char optbuf[sizeof(struct ip_options) + 40];
struct ip_options *opt = (struct ip_options *)optbuf;
+ int res;
if (ip_hdr(skb)->protocol == IPPROTO_ICMP || error != -EACCES)
return;
@@ -1820,7 +1821,11 @@ void cipso_v4_error(struct sk_buff *skb,
memset(opt, 0, sizeof(struct ip_options));
opt->optlen = ip_hdr(skb)->ihl*4 - sizeof(struct iphdr);
- if (__ip_options_compile(dev_net(skb->dev), opt, skb, NULL))
+ rcu_read_lock();
+ res = __ip_options_compile(dev_net(skb->dev), opt, skb, NULL);
+ rcu_read_unlock();
+
+ if (res)
return;
if (gateway)
From: Jann Horn <[email protected]>
commit fd4d9c7d0c71866ec0c2825189ebd2ce35bd95b8 upstream.
When kmem_cache_alloc_bulk() attempts to allocate N objects from a percpu
freelist of length M, and N > M > 0, it will first remove the M elements
from the percpu freelist, then call ___slab_alloc() to allocate the next
element and repopulate the percpu freelist. ___slab_alloc() can re-enable
IRQs via allocate_slab(), so the TID must be bumped before ___slab_alloc()
to properly commit the freelist head change.
Fix it by unconditionally bumping c->tid when entering the slowpath.
Cc: [email protected]
Fixes: ebe909e0fdb3 ("slub: improve bulk alloc strategy")
Signed-off-by: Jann Horn <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
mm/slub.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2932,6 +2932,15 @@ int kmem_cache_alloc_bulk(struct kmem_ca
if (unlikely(!object)) {
/*
+ * We may have removed an object from c->freelist using
+ * the fastpath in the previous iteration; in that case,
+ * c->tid has not been bumped yet.
+ * Since ___slab_alloc() may reenable interrupts while
+ * allocating memory, we should bump c->tid now.
+ */
+ c->tid = next_tid(c->tid);
+
+ /*
* Invoking slow path likely have side-effect
* of re-populating per CPU c->freelist
*/
From: Matthias Schiffer <[email protected]>
commit bc44b78157f621ff2a2618fe287a827bcb094ac4 upstream.
batadv_check_unicast_ttvn() calls skb_cow(), so pointers into the SKB data
must be (re)set after calling it. The ethhdr variable is dropped
altogether.
Fixes: 78fc6bbe0aca ("batman-adv: add UNICAST_4ADDR packet type")
Signed-off-by: Matthias Schiffer <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/routing.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -904,7 +904,6 @@ int batadv_recv_unicast_packet(struct sk
bool is4addr;
unicast_packet = (struct batadv_unicast_packet *)skb->data;
- unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data;
is4addr = unicast_packet->packet_type == BATADV_UNICAST_4ADDR;
/* the caller function should have already pulled 2 bytes */
@@ -925,9 +924,13 @@ int batadv_recv_unicast_packet(struct sk
if (!batadv_check_unicast_ttvn(bat_priv, skb, hdr_size))
return NET_RX_DROP;
+ unicast_packet = (struct batadv_unicast_packet *)skb->data;
+
/* packet for me */
if (batadv_is_my_mac(bat_priv, unicast_packet->dest)) {
if (is4addr) {
+ unicast_4addr_packet =
+ (struct batadv_unicast_4addr_packet *)skb->data;
subtype = unicast_4addr_packet->subtype;
batadv_dat_inc_counter(bat_priv, subtype);
From: Kim Phillips <[email protected]>
[ Upstream commit f967140dfb7442e2db0868b03b961f9c59418a1b ]
Enable the sampling check in kernel/events/core.c::perf_event_open(),
which returns the more appropriate -EOPNOTSUPP.
BEFORE:
$ sudo perf record -a -e instructions,l3_request_g1.caching_l3_cache_accesses true
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (l3_request_g1.caching_l3_cache_accesses).
/bin/dmesg | grep -i perf may provide additional information.
With nothing relevant in dmesg.
AFTER:
$ sudo perf record -a -e instructions,l3_request_g1.caching_l3_cache_accesses true
Error:
l3_request_g1.caching_l3_cache_accesses: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'
Fixes: c43ca5091a37 ("perf/x86/amd: Add support for AMD NB and L2I "uncore" counters")
Signed-off-by: Kim Phillips <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Sasha Levin <[email protected]>
---
arch/x86/kernel/cpu/perf_event_amd_uncore.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_amd_uncore.c b/arch/x86/kernel/cpu/perf_event_amd_uncore.c
index 49742746a6c96..98e786a779fd0 100644
--- a/arch/x86/kernel/cpu/perf_event_amd_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_amd_uncore.c
@@ -181,21 +181,19 @@ static int amd_uncore_event_init(struct perf_event *event)
return -ENOENT;
/*
- * NB and L2 counters (MSRs) are shared across all cores that share the
- * same NB / L2 cache. Interrupts can be directed to a single target
- * core, however, event counts generated by processes running on other
- * cores cannot be masked out. So we do not support sampling and
- * per-thread events.
+ * NB and Last level cache counters (MSRs) are shared across all cores
+ * that share the same NB / Last level cache. On family 16h and below,
+ * Interrupts can be directed to a single target core, however, event
+ * counts generated by processes running on other cores cannot be masked
+ * out. So we do not support sampling and per-thread events via
+ * CAP_NO_INTERRUPT, and we do not enable counter overflow interrupts:
*/
- if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
- return -EINVAL;
/* NB and L2 counters do not have usr/os/guest/host bits */
if (event->attr.exclude_user || event->attr.exclude_kernel ||
event->attr.exclude_host || event->attr.exclude_guest)
return -EINVAL;
- /* and we do not enable counter overflow interrupts */
hwc->config = event->attr.config & AMD64_RAW_EVENT_MASK_NB;
hwc->idx = -1;
@@ -271,6 +269,7 @@ static struct pmu amd_nb_pmu = {
.start = amd_uncore_start,
.stop = amd_uncore_stop,
.read = amd_uncore_read,
+ .capabilities = PERF_PMU_CAP_NO_INTERRUPT,
};
static struct pmu amd_l2_pmu = {
@@ -282,6 +281,7 @@ static struct pmu amd_l2_pmu = {
.start = amd_uncore_start,
.stop = amd_uncore_stop,
.read = amd_uncore_read,
+ .capabilities = PERF_PMU_CAP_NO_INTERRUPT,
};
static struct amd_uncore *amd_uncore_alloc(unsigned int cpu)
--
2.20.1
From: Sven Eckelmann <[email protected]>
commit 36dc621ceca1be3ec885aeade5fdafbbcc452a6d upstream.
batman-adv is creating special debugfs directories in the init
net_namespace for each valid hard-interface (net_device). But it is
possible to rename a net_device to a completely different name then the
original one.
It can therefore happen that a user registers a new net_device which gets
the name "wlan0" assigned by default. batman-adv is also adding a new
directory under $debugfs/batman-adv/ with the name "wlan0".
The user then decides to rename this device to "wl_pri" and registers a
different device. The kernel may now decide to use the name "wlan0" again
for this new device. batman-adv will detect it as a valid net_device and
tries to create a directory with the name "wlan0" under
$debugfs/batman-adv/. But there already exists one with this name under
this path and thus this fails. batman-adv will detect a problem and
rollback the registering of this device.
batman-adv must therefore take care of renaming the debugfs directories
for hard-interfaces whenever it detects such a net_device rename.
Fixes: 5bc7c1eb44f2 ("batman-adv: add debugfs structure for information per interface")
Reported-by: John Soros <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/debugfs.c | 20 ++++++++++++++++++++
net/batman-adv/debugfs.h | 6 ++++++
net/batman-adv/hard-interface.c | 3 +++
3 files changed, 29 insertions(+)
--- a/net/batman-adv/debugfs.c
+++ b/net/batman-adv/debugfs.c
@@ -19,6 +19,7 @@
#include "main.h"
#include <linux/compiler.h>
+#include <linux/dcache.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/errno.h>
@@ -507,6 +508,25 @@ out:
}
/**
+ * batadv_debugfs_rename_hardif() - Fix debugfs path for renamed hardif
+ * @hard_iface: hard interface which was renamed
+ */
+void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
+{
+ const char *name = hard_iface->net_dev->name;
+ struct dentry *dir;
+ struct dentry *d;
+
+ dir = hard_iface->debug_dir;
+ if (!dir)
+ return;
+
+ d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
+ if (!d)
+ pr_err("Can't rename debugfs dir to %s\n", name);
+}
+
+/**
* batadv_debugfs_del_hardif - delete the base directory for a hard interface
* in debugfs.
* @hard_iface: hard interface which is deleted.
--- a/net/batman-adv/debugfs.h
+++ b/net/batman-adv/debugfs.h
@@ -33,6 +33,7 @@ void batadv_debugfs_destroy(void);
int batadv_debugfs_add_meshif(struct net_device *dev);
void batadv_debugfs_del_meshif(struct net_device *dev);
int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface);
+void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface);
void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface);
#else
@@ -61,6 +62,11 @@ int batadv_debugfs_add_hardif(struct bat
}
static inline
+void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
+{
+}
+
+static inline
void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
{
}
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -780,6 +780,9 @@ static int batadv_hard_if_event(struct n
if (hard_iface == primary_if)
batadv_primary_if_update_addr(bat_priv, NULL);
break;
+ case NETDEV_CHANGENAME:
+ batadv_debugfs_rename_hardif(hard_iface);
+ break;
default:
break;
}
From: Marek Vasut <[email protected]>
[ Upstream commit 44343418d0f2f623cb9da6f5000df793131cbe3b ]
The KS8851 requires that packet RX and TX are mutually exclusive.
Currently, the driver hopes to achieve this by disabling interrupt
from the card by writing the card registers and by disabling the
interrupt on the interrupt controller. This however is racy on SMP.
Replace this approach by expanding the spinlock used around the
ks_start_xmit() TX path to ks_irq() RX path to assure true mutual
exclusion and remove the interrupt enabling/disabling, which is
now not needed anymore. Furthermore, disable interrupts also in
ks_net_stop(), which was missing before.
Note that a massive improvement here would be to re-use the KS8851
driver approach, which is to move the TX path into a worker thread,
interrupt handling to threaded interrupt, and synchronize everything
with mutexes, but that would be a much bigger rework, for a separate
patch.
Signed-off-by: Marek Vasut <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Lukas Wunner <[email protected]>
Cc: Petr Stetiar <[email protected]>
Cc: YueHaibing <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
drivers/net/ethernet/micrel/ks8851_mll.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/micrel/ks8851_mll.c b/drivers/net/ethernet/micrel/ks8851_mll.c
index d94e151cff12b..d4747caf1e7cc 100644
--- a/drivers/net/ethernet/micrel/ks8851_mll.c
+++ b/drivers/net/ethernet/micrel/ks8851_mll.c
@@ -831,14 +831,17 @@ static irqreturn_t ks_irq(int irq, void *pw)
{
struct net_device *netdev = pw;
struct ks_net *ks = netdev_priv(netdev);
+ unsigned long flags;
u16 status;
+ spin_lock_irqsave(&ks->statelock, flags);
/*this should be the first in IRQ handler */
ks_save_cmd_reg(ks);
status = ks_rdreg16(ks, KS_ISR);
if (unlikely(!status)) {
ks_restore_cmd_reg(ks);
+ spin_unlock_irqrestore(&ks->statelock, flags);
return IRQ_NONE;
}
@@ -864,6 +867,7 @@ static irqreturn_t ks_irq(int irq, void *pw)
ks->netdev->stats.rx_over_errors++;
/* this should be the last in IRQ handler*/
ks_restore_cmd_reg(ks);
+ spin_unlock_irqrestore(&ks->statelock, flags);
return IRQ_HANDLED;
}
@@ -933,6 +937,7 @@ static int ks_net_stop(struct net_device *netdev)
/* shutdown RX/TX QMU */
ks_disable_qmu(ks);
+ ks_disable_int(ks);
/* set powermode to soft power down to save power */
ks_set_powermode(ks, PMECR_PM_SOFTDOWN);
@@ -989,10 +994,9 @@ static netdev_tx_t ks_start_xmit(struct sk_buff *skb, struct net_device *netdev)
{
netdev_tx_t retv = NETDEV_TX_OK;
struct ks_net *ks = netdev_priv(netdev);
+ unsigned long flags;
- disable_irq(netdev->irq);
- ks_disable_int(ks);
- spin_lock(&ks->statelock);
+ spin_lock_irqsave(&ks->statelock, flags);
/* Extra space are required:
* 4 byte for alignment, 4 for status/length, 4 for CRC
@@ -1006,9 +1010,7 @@ static netdev_tx_t ks_start_xmit(struct sk_buff *skb, struct net_device *netdev)
dev_kfree_skb(skb);
} else
retv = NETDEV_TX_BUSY;
- spin_unlock(&ks->statelock);
- ks_enable_int(ks);
- enable_irq(netdev->irq);
+ spin_unlock_irqrestore(&ks->statelock, flags);
return retv;
}
--
2.20.1
From: Marek Lindner <[email protected]>
commit 16116dac23396e73c01eeee97b102e4833a4b205 upstream.
A translation table TVLV changset sent with an OGM consists
of a number of headers (one per VLAN) plus the changeset
itself (addition and/or deletion of entries).
The per-VLAN headers are used by OGM recipients for consistency
checks. Said consistency check might determine that a full
translation table request is needed to restore consistency. If
the TT sender adds per-VLAN headers of empty VLANs into the OGM,
recipients are led to believe to have reached an inconsistent
state and thus request a full table update. The full table does
not contain empty VLANs (due to missing entries) the cycle
restarts when the next OGM is issued.
Consequently, when the translation table TVLV headers are
composed, empty VLANs are to be excluded.
Fixes: 21a57f6e7a3b ("batman-adv: make the TT CRC logic VLAN specific")
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -813,15 +813,20 @@ batadv_tt_prepare_tvlv_local_data(struct
struct batadv_tvlv_tt_vlan_data *tt_vlan;
struct batadv_softif_vlan *vlan;
u16 num_vlan = 0;
- u16 num_entries = 0;
+ u16 vlan_entries = 0;
+ u16 total_entries = 0;
u16 tvlv_len;
u8 *tt_change_ptr;
int change_offset;
spin_lock_bh(&bat_priv->softif_vlan_list_lock);
hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
+ vlan_entries = atomic_read(&vlan->tt.num_entries);
+ if (vlan_entries < 1)
+ continue;
+
num_vlan++;
- num_entries += atomic_read(&vlan->tt.num_entries);
+ total_entries += vlan_entries;
}
change_offset = sizeof(**tt_data);
@@ -829,7 +834,7 @@ batadv_tt_prepare_tvlv_local_data(struct
/* if tt_len is negative, allocate the space needed by the full table */
if (*tt_len < 0)
- *tt_len = batadv_tt_len(num_entries);
+ *tt_len = batadv_tt_len(total_entries);
tvlv_len = *tt_len;
tvlv_len += change_offset;
@@ -846,6 +851,10 @@ batadv_tt_prepare_tvlv_local_data(struct
tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1);
hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
+ vlan_entries = atomic_read(&vlan->tt.num_entries);
+ if (vlan_entries < 1)
+ continue;
+
tt_vlan->vid = htons(vlan->vid);
tt_vlan->crc = htonl(vlan->tt.crc);
From: Sven Eckelmann <[email protected]>
commit fa122fec8640eb7186ce5a41b83a4c1744ceef8f upstream.
The function batadv_nc_get_nc_node is responsible for adding new nc_nodes
to the in_coding_list and out_coding_list. It first checks whether the
entry already is in the list or not. If it is, then the creation of a new
entry is aborted.
But the lock for the list is only held when the list is really modified.
This could lead to duplicated entries because another context could create
an entry with the same key between the check and the list manipulation.
The check and the manipulation of the list must therefore be in the same
locked code section.
Fixes: d56b1705e28c ("batman-adv: network coding - detect coding nodes and remove these after timeout")
Signed-off-by: Sven Eckelmann <[email protected]>
Acked-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/network-coding.c | 33 +++++++++++++++------------------
1 file changed, 15 insertions(+), 18 deletions(-)
--- a/net/batman-adv/network-coding.c
+++ b/net/batman-adv/network-coding.c
@@ -828,19 +828,29 @@ static struct batadv_nc_node
spinlock_t *lock; /* Used to lock list selected by "int in_coding" */
struct list_head *list;
+ /* Select ingoing or outgoing coding node */
+ if (in_coding) {
+ lock = &orig_neigh_node->in_coding_list_lock;
+ list = &orig_neigh_node->in_coding_list;
+ } else {
+ lock = &orig_neigh_node->out_coding_list_lock;
+ list = &orig_neigh_node->out_coding_list;
+ }
+
+ spin_lock_bh(lock);
+
/* Check if nc_node is already added */
nc_node = batadv_nc_find_nc_node(orig_node, orig_neigh_node, in_coding);
/* Node found */
if (nc_node)
- return nc_node;
+ goto unlock;
nc_node = kzalloc(sizeof(*nc_node), GFP_ATOMIC);
if (!nc_node)
- return NULL;
+ goto unlock;
- if (!atomic_inc_not_zero(&orig_neigh_node->refcount))
- goto free;
+ atomic_inc(&orig_neigh_node->refcount);
/* Initialize nc_node */
INIT_LIST_HEAD(&nc_node->list);
@@ -848,28 +858,15 @@ static struct batadv_nc_node
nc_node->orig_node = orig_neigh_node;
atomic_set(&nc_node->refcount, 2);
- /* Select ingoing or outgoing coding node */
- if (in_coding) {
- lock = &orig_neigh_node->in_coding_list_lock;
- list = &orig_neigh_node->in_coding_list;
- } else {
- lock = &orig_neigh_node->out_coding_list_lock;
- list = &orig_neigh_node->out_coding_list;
- }
-
batadv_dbg(BATADV_DBG_NC, bat_priv, "Adding nc_node %pM -> %pM\n",
nc_node->addr, nc_node->orig_node->orig);
/* Add nc_node to orig_node */
- spin_lock_bh(lock);
list_add_tail_rcu(&nc_node->list, list);
+unlock:
spin_unlock_bh(lock);
return nc_node;
-
-free:
- kfree(nc_node);
- return NULL;
}
/**
From: Sven Eckelmann <[email protected]>
commit 4ba104f468bbfc27362c393815d03aa18fb7a20f upstream.
The batadv_hash_remove is a function which searches the hashtable for an
entry using a needle, a hashtable bucket selection function and a compare
function. It will lock the bucket list and delete an entry when the compare
function matches it with the needle. It returns the pointer to the
hlist_node which matches or NULL when no entry matches the needle.
The batadv_bla_del_claim is not itself protected in anyway to avoid that
any other function is modifying the hashtable between the search for the
entry and the call to batadv_hash_remove. It can therefore happen that the
entry either doesn't exist anymore or an entry was deleted which is not the
same object as the needle. In such an situation, the reference counter (for
the reference stored in the hashtable) must not be reduced for the needle.
Instead the reference counter of the actually removed entry has to be
reduced.
Otherwise the reference counter will underflow and the object might be
freed before all its references were dropped. The kref helpers reported
this problem as:
refcount_t: underflow; use-after-free.
Fixes: 23721387c409 ("batman-adv: add basic bridge loop avoidance code")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bridge_loop_avoidance.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -694,6 +694,8 @@ static void batadv_bla_del_claim(struct
const u8 *mac, const unsigned short vid)
{
struct batadv_bla_claim search_claim, *claim;
+ struct batadv_bla_claim *claim_removed_entry;
+ struct hlist_node *claim_removed_node;
ether_addr_copy(search_claim.addr, mac);
search_claim.vid = vid;
@@ -704,10 +706,18 @@ static void batadv_bla_del_claim(struct
batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_del_claim(): %pM, vid %d\n",
mac, BATADV_PRINT_VID(vid));
- batadv_hash_remove(bat_priv->bla.claim_hash, batadv_compare_claim,
- batadv_choose_claim, claim);
- batadv_claim_free_ref(claim); /* reference from the hash is gone */
+ claim_removed_node = batadv_hash_remove(bat_priv->bla.claim_hash,
+ batadv_compare_claim,
+ batadv_choose_claim, claim);
+ if (!claim_removed_node)
+ goto free_claim;
+ /* reference from the hash is gone */
+ claim_removed_entry = hlist_entry(claim_removed_node,
+ struct batadv_bla_claim, hash_entry);
+ batadv_claim_free_ref(claim_removed_entry);
+
+free_claim:
/* don't need the reference from hash_find() anymore */
batadv_claim_free_ref(claim);
}
From: Kees Cook <[email protected]>
commit f87b1c49bc675da30d8e1e8f4b60b800312c7b90 upstream.
When the uaccess .fixup section was renamed to .text.fixup, one case was
missed. Under ld.bfd, the orphaned section was moved close to .text
(since they share the "ax" bits), so things would work normally on
uaccess faults. Under ld.lld, the orphaned section was placed outside
the .text section, making it unreachable.
Link: https://github.com/ClangBuiltLinux/linux/issues/282
Link: https://bugs.chromium.org/p/chromium/issues/detail?id=1020633#c44
Link: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/lkml/202002071754.F5F073F1D@keescook/
Fixes: c4a84ae39b4a5 ("ARM: 8322/1: keep .text and .fixup regions closer together")
Cc: [email protected]
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Nick Desaulniers <[email protected]>
Signed-off-by: Russell King <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/arm/lib/copy_from_user.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm/lib/copy_from_user.S
+++ b/arch/arm/lib/copy_from_user.S
@@ -100,7 +100,7 @@ ENTRY(arm_copy_from_user)
ENDPROC(arm_copy_from_user)
- .pushsection .fixup,"ax"
+ .pushsection .text.fixup,"ax"
.align 0
copy_abort_preamble
ldmfd sp!, {r1, r2}
From: Sven Eckelmann <[email protected]>
commit 6da7be7d24b2921f8215473ba7552796dff05fe1 upstream.
batman-adv is creating special debugfs directories in the init
net_namespace for each created soft-interface (batadv net_device). But it
is possible to rename a net_device to a completely different name then the
original one.
It can therefore happen that a user registers a new batadv net_device with
the name "bat0". batman-adv is then also adding a new directory under
$debugfs/batman-adv/ with the name "wlan0".
The user then decides to rename this device to "bat1" and registers a
different batadv device with the name "bat0". batman-adv will then try to
create a directory with the name "bat0" under $debugfs/batman-adv/ again.
But there already exists one with this name under this path and thus this
fails. batman-adv will detect a problem and rollback the registering of
this device.
batman-adv must therefore take care of renaming the debugfs directories for
soft-interfaces whenever it detects such a net_device rename.
Fixes: c6c8fea29769 ("net: Add batman-adv meshing protocol")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/debugfs.c | 20 ++++++++++++++++++++
net/batman-adv/debugfs.h | 5 +++++
net/batman-adv/hard-interface.c | 34 ++++++++++++++++++++++++++++------
3 files changed, 53 insertions(+), 6 deletions(-)
--- a/net/batman-adv/debugfs.c
+++ b/net/batman-adv/debugfs.c
@@ -581,6 +581,26 @@ out:
return -ENOMEM;
}
+/**
+ * batadv_debugfs_rename_meshif() - Fix debugfs path for renamed softif
+ * @dev: net_device which was renamed
+ */
+void batadv_debugfs_rename_meshif(struct net_device *dev)
+{
+ struct batadv_priv *bat_priv = netdev_priv(dev);
+ const char *name = dev->name;
+ struct dentry *dir;
+ struct dentry *d;
+
+ dir = bat_priv->debug_dir;
+ if (!dir)
+ return;
+
+ d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
+ if (!d)
+ pr_err("Can't rename debugfs dir to %s\n", name);
+}
+
void batadv_debugfs_del_meshif(struct net_device *dev)
{
struct batadv_priv *bat_priv = netdev_priv(dev);
--- a/net/batman-adv/debugfs.h
+++ b/net/batman-adv/debugfs.h
@@ -31,6 +31,7 @@ struct net_device;
void batadv_debugfs_init(void);
void batadv_debugfs_destroy(void);
int batadv_debugfs_add_meshif(struct net_device *dev);
+void batadv_debugfs_rename_meshif(struct net_device *dev);
void batadv_debugfs_del_meshif(struct net_device *dev);
int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface);
void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface);
@@ -51,6 +52,10 @@ static inline int batadv_debugfs_add_mes
return 0;
}
+static inline void batadv_debugfs_rename_meshif(struct net_device *dev)
+{
+}
+
static inline void batadv_debugfs_del_meshif(struct net_device *dev)
{
}
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -725,6 +725,32 @@ void batadv_hardif_remove_interfaces(voi
rtnl_unlock();
}
+/**
+ * batadv_hard_if_event_softif() - Handle events for soft interfaces
+ * @event: NETDEV_* event to handle
+ * @net_dev: net_device which generated an event
+ *
+ * Return: NOTIFY_* result
+ */
+static int batadv_hard_if_event_softif(unsigned long event,
+ struct net_device *net_dev)
+{
+ struct batadv_priv *bat_priv;
+
+ switch (event) {
+ case NETDEV_REGISTER:
+ batadv_sysfs_add_meshif(net_dev);
+ bat_priv = netdev_priv(net_dev);
+ batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS);
+ break;
+ case NETDEV_CHANGENAME:
+ batadv_debugfs_rename_meshif(net_dev);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
static int batadv_hard_if_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
@@ -733,12 +759,8 @@ static int batadv_hard_if_event(struct n
struct batadv_hard_iface *primary_if = NULL;
struct batadv_priv *bat_priv;
- if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) {
- batadv_sysfs_add_meshif(net_dev);
- bat_priv = netdev_priv(net_dev);
- batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS);
- return NOTIFY_DONE;
- }
+ if (batadv_softif_is_valid(net_dev))
+ return batadv_hard_if_event_softif(event, net_dev);
hard_iface = batadv_hardif_get_by_netdev(net_dev);
if (!hard_iface && event == NETDEV_REGISTER)
From: Sven Eckelmann <[email protected]>
commit a15d56a60760aa9dbe26343b9a0ac5228f35d445 upstream.
Multiple batadv_ogm_packet can be stored in an skbuff. The functions
batadv_iv_ogm_send_to_if()/batadv_iv_ogm_receive() use
batadv_iv_ogm_aggr_packet() to check if there is another additional
batadv_ogm_packet in the skb or not before they continue processing the
packet.
The length for such an OGM is BATADV_OGM_HLEN +
batadv_ogm_packet->tvlv_len. The check must first check that at least
BATADV_OGM_HLEN bytes are available before it accesses tvlv_len (which is
part of the header. Otherwise it might try read outside of the currently
available skbuff to get the content of tvlv_len.
Fixes: ef26157747d4 ("batman-adv: tvlv - basic infrastructure")
Reported-by: [email protected]
Signed-off-by: Sven Eckelmann <[email protected]>
Acked-by: Antonio Quartulli <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bat_iv_ogm.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -397,14 +397,19 @@ static u8 batadv_hop_penalty(u8 tq, cons
return new_tq;
}
-/* is there another aggregated packet here? */
-static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len,
- __be16 tvlv_len)
+static bool
+batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len,
+ const struct batadv_ogm_packet *ogm_packet)
{
int next_buff_pos = 0;
- next_buff_pos += buff_pos + BATADV_OGM_HLEN;
- next_buff_pos += ntohs(tvlv_len);
+ /* check if there is enough space for the header */
+ next_buff_pos += buff_pos + sizeof(*ogm_packet);
+ if (next_buff_pos > packet_len)
+ return false;
+
+ /* check if there is enough space for the optional TVLV */
+ next_buff_pos += ntohs(ogm_packet->tvlv_len);
return (next_buff_pos <= packet_len) &&
(next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES);
@@ -432,7 +437,7 @@ static void batadv_iv_ogm_send_to_if(str
/* adjust all flags and log packets */
while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len,
- batadv_ogm_packet->tvlv_len)) {
+ batadv_ogm_packet)) {
/* we might have aggregated direct link packets with an
* ordinary base packet
*/
@@ -1751,7 +1756,7 @@ static int batadv_iv_ogm_receive(struct
/* unpack the aggregated packets and process them one by one */
while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb),
- ogm_packet->tvlv_len)) {
+ ogm_packet)) {
batadv_iv_ogm_process(skb, ogm_offset, if_incoming);
ogm_offset += BATADV_OGM_HLEN;
From: Sven Eckelmann <[email protected]>
commit 248e23b50e2da0753f3b5faa068939cbe9f8a75a upstream.
The function batadv_frag_skb_buffer was supposed not to consume the skbuff
on errors. This was followed in the helper function
batadv_frag_insert_packet when the skb would potentially be inserted in the
fragment queue. But it could happen that the next helper function
batadv_frag_merge_packets would try to merge the fragments and fail. This
results in a kfree_skb of all the enqueued fragments (including the just
inserted one). batadv_recv_frag_packet would detect the error in
batadv_frag_skb_buffer and try to free the skb again.
The behavior of batadv_frag_skb_buffer (and its helper
batadv_frag_insert_packet) must therefore be changed to always consume the
skbuff to have a common behavior and avoid the double kfree_skb.
Fixes: 610bfc6bc99b ("batman-adv: Receive fragmented packets and merge")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/fragmentation.c | 6 ++++--
net/batman-adv/routing.c | 6 ++++++
2 files changed, 10 insertions(+), 2 deletions(-)
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -233,8 +233,10 @@ err_unlock:
spin_unlock_bh(&chain->lock);
err:
- if (!ret)
+ if (!ret) {
kfree(frag_entry_new);
+ kfree_skb(skb);
+ }
return ret;
}
@@ -329,9 +331,9 @@ bool batadv_frag_skb_buffer(struct sk_bu
goto out_err;
out:
- *skb = skb_out;
ret = true;
out_err:
+ *skb = skb_out;
return ret;
}
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -1053,6 +1053,12 @@ int batadv_recv_frag_packet(struct sk_bu
batadv_inc_counter(bat_priv, BATADV_CNT_FRAG_RX);
batadv_add_counter(bat_priv, BATADV_CNT_FRAG_RX_BYTES, skb->len);
+ /* batadv_frag_skb_buffer will always consume the skb and
+ * the caller should therefore never try to free the
+ * skb after this point
+ */
+ ret = NET_RX_SUCCESS;
+
/* Add fragment to buffer and merge if possible. */
if (!batadv_frag_skb_buffer(&skb, orig_node_src))
goto out;
From: Sven Eckelmann <[email protected]>
commit dff9bc42ab0b2d38c5e90ddd79b238fed5b4c7ad upstream.
The function batadv_gw_node_add is responsible for adding new gw_node to
the gateway_list. It is expecting that the caller already checked that
there is not already an entry with the same key or not.
But the lock for the list is only held when the list is really modified.
This could lead to duplicated entries because another context could create
an entry with the same key between the check and the list manipulation.
The check and the manipulation of the list must therefore be in the same
locked code section.
Fixes: c6c8fea29769 ("net: Add batman-adv meshing protocol")
Signed-off-by: Sven Eckelmann <[email protected]>
Acked-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/gateway_client.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -29,6 +29,7 @@
#include <linux/ipv6.h>
#include <linux/kernel.h>
#include <linux/list.h>
+#include <linux/lockdep.h>
#include <linux/netdevice.h>
#include <linux/rculist.h>
#include <linux/rcupdate.h>
@@ -413,6 +414,9 @@ out:
* @bat_priv: the bat priv with all the soft interface information
* @orig_node: originator announcing gateway capabilities
* @gateway: announced bandwidth information
+ *
+ * Has to be called with the appropriate locks being acquired
+ * (gw.list_lock).
*/
static void batadv_gw_node_add(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
@@ -420,6 +424,8 @@ static void batadv_gw_node_add(struct ba
{
struct batadv_gw_node *gw_node;
+ lockdep_assert_held(&bat_priv->gw.list_lock);
+
if (gateway->bandwidth_down == 0)
return;
@@ -438,9 +444,7 @@ static void batadv_gw_node_add(struct ba
gw_node->bandwidth_up = ntohl(gateway->bandwidth_up);
atomic_set(&gw_node->refcount, 1);
- spin_lock_bh(&bat_priv->gw.list_lock);
hlist_add_head_rcu(&gw_node->list, &bat_priv->gw.list);
- spin_unlock_bh(&bat_priv->gw.list_lock);
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Found new gateway %pM -> gw bandwidth: %u.%u/%u.%u MBit\n",
@@ -493,11 +497,14 @@ void batadv_gw_node_update(struct batadv
{
struct batadv_gw_node *gw_node, *curr_gw = NULL;
+ spin_lock_bh(&bat_priv->gw.list_lock);
gw_node = batadv_gw_node_get(bat_priv, orig_node);
if (!gw_node) {
batadv_gw_node_add(bat_priv, orig_node, gateway);
+ spin_unlock_bh(&bat_priv->gw.list_lock);
goto out;
}
+ spin_unlock_bh(&bat_priv->gw.list_lock);
if ((gw_node->bandwidth_down == ntohl(gateway->bandwidth_down)) &&
(gw_node->bandwidth_up == ntohl(gateway->bandwidth_up)))
From: Sven Eckelmann <[email protected]>
commit cbef1e102003edb236c6b2319ab269ccef963731 upstream.
The orig_ifinfo reference counter for last_bonding_candidate in
batadv_orig_node has to be reduced when an originator node is released.
Otherwise the orig_ifinfo is leaked and the reference counter the netdevice
is not reduced correctly.
Fixes: f3b3d9018975 ("batman-adv: add bonding again")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/originator.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -565,6 +565,7 @@ static void batadv_orig_node_release(str
struct batadv_neigh_node *neigh_node;
struct batadv_orig_ifinfo *orig_ifinfo;
struct batadv_orig_node_vlan *vlan;
+ struct batadv_orig_ifinfo *last_candidate;
spin_lock_bh(&orig_node->neigh_list_lock);
@@ -580,8 +581,14 @@ static void batadv_orig_node_release(str
hlist_del_rcu(&orig_ifinfo->list);
batadv_orig_ifinfo_free_ref(orig_ifinfo);
}
+
+ last_candidate = orig_node->last_bonding_candidate;
+ orig_node->last_bonding_candidate = NULL;
spin_unlock_bh(&orig_node->neigh_list_lock);
+ if (last_candidate)
+ batadv_orig_ifinfo_free_ref(last_candidate);
+
spin_lock_bh(&orig_node->vlan_list_lock);
hlist_for_each_entry_safe(vlan, node_tmp, &orig_node->vlan_list, list) {
hlist_del_rcu(&vlan->list);
From: Linus L?ssing <[email protected]>
commit 7072337e52b3e9d5460500d8dc9cbc1ba2db084c upstream.
The previous TT sync fix so far only fixed TT responses issued by the
target node directly. So far, TT responses issued by intermediate nodes
still lead to the wrong flags being added, leading to CRC mismatches.
This behaviour was observed at Freifunk Hannover in a 800 nodes setup
where a considerable amount of nodes were still infected with 'WI'
TT flags even with (most) nodes having the previous TT sync fix applied.
I was able to reproduce the issue with intermediate TT responses in a
four node test setup and this patch fixes this issue by ensuring to
use the per originator instead of the summarized, OR'd ones.
Fixes: e9c00136a475 ("batman-adv: fix tt_global_entries flags update")
Reported-by: Leonardo M?rlein <[email protected]>
Signed-off-by: Linus L?ssing <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 37 +++++++++++++++++++++++++++++--------
1 file changed, 29 insertions(+), 8 deletions(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1249,7 +1249,8 @@ batadv_tt_global_orig_entry_find(const s
*/
static bool
batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry,
- const struct batadv_orig_node *orig_node)
+ const struct batadv_orig_node *orig_node,
+ u8 *flags)
{
struct batadv_tt_orig_list_entry *orig_entry;
bool found = false;
@@ -1257,6 +1258,10 @@ batadv_tt_global_entry_has_orig(const st
orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node);
if (orig_entry) {
found = true;
+
+ if (flags)
+ *flags = orig_entry->flags;
+
batadv_tt_orig_list_entry_free_ref(orig_entry);
}
@@ -1432,7 +1437,7 @@ static bool batadv_tt_global_add(struct
if (!(common->flags & BATADV_TT_CLIENT_TEMP))
goto out;
if (batadv_tt_global_entry_has_orig(tt_global_entry,
- orig_node))
+ orig_node, NULL))
goto out_remove;
batadv_tt_global_del_orig_list(tt_global_entry);
goto add_orig_entry;
@@ -2366,17 +2371,24 @@ unlock:
*
* Returns 1 if the entry is a valid, 0 otherwise.
*/
-static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr)
+static int batadv_tt_local_valid(const void *entry_ptr,
+ const void *data_ptr,
+ u8 *flags)
{
const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW)
return 0;
+
+ if (flags)
+ *flags = tt_common_entry->flags;
+
return 1;
}
static int batadv_tt_global_valid(const void *entry_ptr,
- const void *data_ptr)
+ const void *data_ptr,
+ u8 *flags)
{
const struct batadv_tt_common_entry *tt_common_entry = entry_ptr;
const struct batadv_tt_global_entry *tt_global_entry;
@@ -2390,7 +2402,8 @@ static int batadv_tt_global_valid(const
struct batadv_tt_global_entry,
common);
- return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node);
+ return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node,
+ flags);
}
/**
@@ -2406,18 +2419,25 @@ static int batadv_tt_global_valid(const
static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv,
struct batadv_hashtable *hash,
void *tvlv_buff, u16 tt_len,
- int (*valid_cb)(const void *, const void *),
+ int (*valid_cb)(const void *,
+ const void *,
+ u8 *flags),
void *cb_data)
{
struct batadv_tt_common_entry *tt_common_entry;
struct batadv_tvlv_tt_change *tt_change;
struct hlist_head *head;
u16 tt_tot, tt_num_entries = 0;
+ u8 flags;
+ bool ret;
u32 i;
tt_tot = batadv_tt_entries(tt_len);
tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff;
+ if (!valid_cb)
+ return;
+
rcu_read_lock();
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
@@ -2427,11 +2447,12 @@ static void batadv_tt_tvlv_generate(stru
if (tt_tot == tt_num_entries)
break;
- if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data)))
+ ret = valid_cb(tt_common_entry, cb_data, &flags);
+ if (!ret)
continue;
ether_addr_copy(tt_change->addr, tt_common_entry->addr);
- tt_change->flags = tt_common_entry->flags;
+ tt_change->flags = flags;
tt_change->vid = htons(tt_common_entry->vid);
memset(tt_change->reserved, 0,
sizeof(tt_change->reserved));
From: Sven Eckelmann <[email protected]>
commit fc04fdb2c8a894283259f5621d31d75610701091 upstream.
batadv_check_unicast_ttvn may redirect a packet to itself or another
originator. This involves rewriting the ttvn and the destination address in
the batadv unicast header. These field were not yet pulled (with skb rcsum
update) and thus any change to them also requires a change in the receive
checksum.
Reported-by: Matthias Schiffer <[email protected]>
Fixes: a73105b8d4c7 ("batman-adv: improved client announcement mechanism")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/routing.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -704,6 +704,7 @@ out:
/**
* batadv_reroute_unicast_packet - update the unicast header for re-routing
* @bat_priv: the bat priv with all the soft interface information
+ * @skb: unicast packet to process
* @unicast_packet: the unicast header to be updated
* @dst_addr: the payload destination
* @vid: VLAN identifier
@@ -715,7 +716,7 @@ out:
* Returns true if the packet header has been updated, false otherwise
*/
static bool
-batadv_reroute_unicast_packet(struct batadv_priv *bat_priv,
+batadv_reroute_unicast_packet(struct batadv_priv *bat_priv, struct sk_buff *skb,
struct batadv_unicast_packet *unicast_packet,
u8 *dst_addr, unsigned short vid)
{
@@ -744,8 +745,10 @@ batadv_reroute_unicast_packet(struct bat
}
/* update the packet header */
+ skb_postpull_rcsum(skb, unicast_packet, sizeof(*unicast_packet));
ether_addr_copy(unicast_packet->dest, orig_addr);
unicast_packet->ttvn = orig_ttvn;
+ skb_postpush_rcsum(skb, unicast_packet, sizeof(*unicast_packet));
ret = true;
out:
@@ -785,7 +788,7 @@ static int batadv_check_unicast_ttvn(str
* the packet to
*/
if (batadv_tt_local_client_is_roaming(bat_priv, ethhdr->h_dest, vid)) {
- if (batadv_reroute_unicast_packet(bat_priv, unicast_packet,
+ if (batadv_reroute_unicast_packet(bat_priv, skb, unicast_packet,
ethhdr->h_dest, vid))
batadv_dbg_ratelimited(BATADV_DBG_TT,
bat_priv,
@@ -831,7 +834,7 @@ static int batadv_check_unicast_ttvn(str
* destination can possibly be updated and forwarded towards the new
* target host
*/
- if (batadv_reroute_unicast_packet(bat_priv, unicast_packet,
+ if (batadv_reroute_unicast_packet(bat_priv, skb, unicast_packet,
ethhdr->h_dest, vid)) {
batadv_dbg_ratelimited(BATADV_DBG_TT, bat_priv,
"Rerouting unicast packet to %pM (dst=%pM): TTVN mismatch old_ttvn=%u new_ttvn=%u\n",
@@ -854,12 +857,14 @@ static int batadv_check_unicast_ttvn(str
if (!primary_if)
return 0;
+ /* update the packet header */
+ skb_postpull_rcsum(skb, unicast_packet, sizeof(*unicast_packet));
ether_addr_copy(unicast_packet->dest, primary_if->net_dev->dev_addr);
+ unicast_packet->ttvn = curr_ttvn;
+ skb_postpush_rcsum(skb, unicast_packet, sizeof(*unicast_packet));
batadv_hardif_free_ref(primary_if);
- unicast_packet->ttvn = curr_ttvn;
-
return 1;
}
From: Sven Eckelmann <[email protected]>
commit 3d65b9accab4a7ed5038f6df403fbd5e298398c7 upstream.
The batadv_hash_remove is a function which searches the hashtable for an
entry using a needle, a hashtable bucket selection function and a compare
function. It will lock the bucket list and delete an entry when the compare
function matches it with the needle. It returns the pointer to the
hlist_node which matches or NULL when no entry matches the needle.
The batadv_tt_local_remove is not itself protected in anyway to avoid that
any other function is modifying the hashtable between the search for the
entry and the call to batadv_hash_remove. It can therefore happen that the
entry either doesn't exist anymore or an entry was deleted which is not the
same object as the needle. In such an situation, the reference counter (for
the reference stored in the hashtable) must not be reduced for the needle.
Instead the reference counter of the actually removed entry has to be
reduced.
Otherwise the reference counter will underflow and the object might be
freed before all its references were dropped. The kref helpers reported
this problem as:
refcount_t: underflow; use-after-free.
Fixes: ef72706a0543 ("batman-adv: protect tt_local_entry from concurrent delete events")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1049,9 +1049,10 @@ u16 batadv_tt_local_remove(struct batadv
unsigned short vid, const char *message,
bool roaming)
{
+ struct batadv_tt_local_entry *tt_removed_entry;
struct batadv_tt_local_entry *tt_local_entry;
u16 flags, curr_flags = BATADV_NO_FLAGS;
- void *tt_entry_exists;
+ struct hlist_node *tt_removed_node;
tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid);
if (!tt_local_entry)
@@ -1080,15 +1081,18 @@ u16 batadv_tt_local_remove(struct batadv
*/
batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL);
- tt_entry_exists = batadv_hash_remove(bat_priv->tt.local_hash,
+ tt_removed_node = batadv_hash_remove(bat_priv->tt.local_hash,
batadv_compare_tt,
batadv_choose_tt,
&tt_local_entry->common);
- if (!tt_entry_exists)
+ if (!tt_removed_node)
goto out;
- /* extra call to free the local tt entry */
- batadv_tt_local_entry_free_ref(tt_local_entry);
+ /* drop reference of remove hash entry */
+ tt_removed_entry = hlist_entry(tt_removed_node,
+ struct batadv_tt_local_entry,
+ common.hash_entry);
+ batadv_tt_local_entry_free_ref(tt_removed_entry);
out:
if (tt_local_entry)
From: Simon Wunderlich <[email protected]>
commit 5a1dd8a4773d4c24e925cc6154826d555a85c370 upstream.
We have found some networks in which nodes were constantly requesting
other nodes BLA claim tables to synchronize, just to ask for that again
once completed. The reason was that the crc checksum of the asked nodes
were out of sync due to missing locking and multiple writes to the same
crc checksum when adding/removing entries. Therefore the asked nodes
constantly reported the wrong crc, which caused repeating requests.
To avoid multiple functions changing a backbone gateways crc entry at
the same time, lock it using a spinlock.
Signed-off-by: Simon Wunderlich <[email protected]>
Tested-by: Alfons Name <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bridge_loop_avoidance.c | 35 ++++++++++++++++++++++++++++-----
net/batman-adv/types.h | 2 +
2 files changed, 32 insertions(+), 5 deletions(-)
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -256,7 +256,9 @@ batadv_bla_del_backbone_claims(struct ba
}
/* all claims gone, initialize CRC */
+ spin_lock_bh(&backbone_gw->crc_lock);
backbone_gw->crc = BATADV_BLA_CRC_INIT;
+ spin_unlock_bh(&backbone_gw->crc_lock);
}
/**
@@ -407,6 +409,7 @@ batadv_bla_get_backbone_gw(struct batadv
entry->lasttime = jiffies;
entry->crc = BATADV_BLA_CRC_INIT;
entry->bat_priv = bat_priv;
+ spin_lock_init(&entry->crc_lock);
atomic_set(&entry->request_sent, 0);
atomic_set(&entry->wait_periods, 0);
ether_addr_copy(entry->orig, orig);
@@ -556,7 +559,9 @@ static void batadv_bla_send_announce(str
__be16 crc;
memcpy(mac, batadv_announce_mac, 4);
+ spin_lock_bh(&backbone_gw->crc_lock);
crc = htons(backbone_gw->crc);
+ spin_unlock_bh(&backbone_gw->crc_lock);
memcpy(&mac[4], &crc, 2);
batadv_bla_send_claim(bat_priv, mac, backbone_gw->vid,
@@ -617,14 +622,18 @@ static void batadv_bla_add_claim(struct
"bla_add_claim(): changing ownership for %pM, vid %d\n",
mac, BATADV_PRINT_VID(vid));
+ spin_lock_bh(&claim->backbone_gw->crc_lock);
claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
+ spin_unlock_bh(&claim->backbone_gw->crc_lock);
batadv_backbone_gw_free_ref(claim->backbone_gw);
}
/* set (new) backbone gw */
atomic_inc(&backbone_gw->refcount);
claim->backbone_gw = backbone_gw;
+ spin_lock_bh(&backbone_gw->crc_lock);
backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
+ spin_unlock_bh(&backbone_gw->crc_lock);
backbone_gw->lasttime = jiffies;
claim_free_ref:
@@ -652,7 +661,9 @@ static void batadv_bla_del_claim(struct
batadv_choose_claim, claim);
batadv_claim_free_ref(claim); /* reference from the hash is gone */
+ spin_lock_bh(&claim->backbone_gw->crc_lock);
claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
+ spin_unlock_bh(&claim->backbone_gw->crc_lock);
/* don't need the reference from hash_find() anymore */
batadv_claim_free_ref(claim);
@@ -663,7 +674,7 @@ static int batadv_handle_announce(struct
u8 *backbone_addr, unsigned short vid)
{
struct batadv_bla_backbone_gw *backbone_gw;
- u16 crc;
+ u16 backbone_crc, crc;
if (memcmp(an_addr, batadv_announce_mac, 4) != 0)
return 0;
@@ -682,12 +693,16 @@ static int batadv_handle_announce(struct
"handle_announce(): ANNOUNCE vid %d (sent by %pM)... CRC = %#.4x\n",
BATADV_PRINT_VID(vid), backbone_gw->orig, crc);
- if (backbone_gw->crc != crc) {
+ spin_lock_bh(&backbone_gw->crc_lock);
+ backbone_crc = backbone_gw->crc;
+ spin_unlock_bh(&backbone_gw->crc_lock);
+
+ if (backbone_crc != crc) {
batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv,
"handle_announce(): CRC FAILED for %pM/%d (my = %#.4x, sent = %#.4x)\n",
backbone_gw->orig,
BATADV_PRINT_VID(backbone_gw->vid),
- backbone_gw->crc, crc);
+ backbone_crc, crc);
batadv_bla_send_request(backbone_gw);
} else {
@@ -1658,6 +1673,7 @@ int batadv_bla_claim_table_seq_print_tex
struct batadv_bla_claim *claim;
struct batadv_hard_iface *primary_if;
struct hlist_head *head;
+ u16 backbone_crc;
u32 i;
bool is_own;
u8 *primary_addr;
@@ -1680,11 +1696,15 @@ int batadv_bla_claim_table_seq_print_tex
hlist_for_each_entry_rcu(claim, head, hash_entry) {
is_own = batadv_compare_eth(claim->backbone_gw->orig,
primary_addr);
+
+ spin_lock_bh(&claim->backbone_gw->crc_lock);
+ backbone_crc = claim->backbone_gw->crc;
+ spin_unlock_bh(&claim->backbone_gw->crc_lock);
seq_printf(seq, " * %pM on %5d by %pM [%c] (%#.4x)\n",
claim->addr, BATADV_PRINT_VID(claim->vid),
claim->backbone_gw->orig,
(is_own ? 'x' : ' '),
- claim->backbone_gw->crc);
+ backbone_crc);
}
rcu_read_unlock();
}
@@ -1703,6 +1723,7 @@ int batadv_bla_backbone_table_seq_print_
struct batadv_hard_iface *primary_if;
struct hlist_head *head;
int secs, msecs;
+ u16 backbone_crc;
u32 i;
bool is_own;
u8 *primary_addr;
@@ -1733,10 +1754,14 @@ int batadv_bla_backbone_table_seq_print_
if (is_own)
continue;
+ spin_lock_bh(&backbone_gw->crc_lock);
+ backbone_crc = backbone_gw->crc;
+ spin_unlock_bh(&backbone_gw->crc_lock);
+
seq_printf(seq, " * %pM on %5d %4i.%03is (%#.4x)\n",
backbone_gw->orig,
BATADV_PRINT_VID(backbone_gw->vid), secs,
- msecs, backbone_gw->crc);
+ msecs, backbone_crc);
}
rcu_read_unlock();
}
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -884,6 +884,7 @@ struct batadv_socket_packet {
* backbone gateway - no bcast traffic is formwared until the situation was
* resolved
* @crc: crc16 checksum over all claims
+ * @crc_lock: lock protecting crc
* @refcount: number of contexts the object is used
* @rcu: struct used for freeing in an RCU-safe manner
*/
@@ -897,6 +898,7 @@ struct batadv_bla_backbone_gw {
atomic_t wait_periods;
atomic_t request_sent;
u16 crc;
+ spinlock_t crc_lock; /* protects crc */
atomic_t refcount;
struct rcu_head rcu;
};
From: Linus L?ssing <[email protected]>
commit 51c6b429c0c95e67edd1cb0b548c5cf6a6604763 upstream.
Trying to split and transmit a unicast packet in 16 parts will fail for
the final fragment: After having sent the 15th one with a frag_packet.no
index of 14, we will increase the the index to 15 - and return with an
error code immediately, even though one more fragment is due for
transmission and allowed.
Fixing this issue by moving the check before incrementing the index.
While at it, adding an unlikely(), because the check is actually more of
an assertion.
Fixes: ee75ed88879a ("batman-adv: Fragment and send skbs larger than mtu")
Signed-off-by: Linus L?ssing <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/fragmentation.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -480,6 +480,10 @@ bool batadv_frag_send_packet(struct sk_b
/* Eat and send fragments from the tail of skb */
while (skb->len > max_fragment_size) {
+ /* The initial check in this function should cover this case */
+ if (frag_header.no == BATADV_FRAG_MAX_FRAGMENTS - 1)
+ goto out_err;
+
skb_fragment = batadv_frag_create(skb, &frag_header, mtu);
if (!skb_fragment)
goto out_err;
@@ -490,10 +494,6 @@ bool batadv_frag_send_packet(struct sk_b
batadv_send_skb_packet(skb_fragment, neigh_node->if_incoming,
neigh_node->addr);
frag_header.no++;
-
- /* The initial check in this function should cover this case */
- if (frag_header.no == BATADV_FRAG_MAX_FRAGMENTS - 1)
- goto out_err;
}
/* Make room for the fragment header. */
From: Qian Cai <[email protected]>
[ Upstream commit 6c5d911249290f41f7b50b43344a7520605b1acb ]
journal_head::b_transaction and journal_head::b_next_transaction could
be accessed concurrently as noticed by KCSAN,
LTP: starting fsync04
/dev/zero: Can't open blockdev
EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
EXT4-fs (loop0): mounted filesystem with ordered data mode. Opts: (null)
==================================================================
BUG: KCSAN: data-race in __jbd2_journal_refile_buffer [jbd2] / jbd2_write_access_granted [jbd2]
write to 0xffff99f9b1bd0e30 of 8 bytes by task 25721 on cpu 70:
__jbd2_journal_refile_buffer+0xdd/0x210 [jbd2]
__jbd2_journal_refile_buffer at fs/jbd2/transaction.c:2569
jbd2_journal_commit_transaction+0x2d15/0x3f20 [jbd2]
(inlined by) jbd2_journal_commit_transaction at fs/jbd2/commit.c:1034
kjournald2+0x13b/0x450 [jbd2]
kthread+0x1cd/0x1f0
ret_from_fork+0x27/0x50
read to 0xffff99f9b1bd0e30 of 8 bytes by task 25724 on cpu 68:
jbd2_write_access_granted+0x1b2/0x250 [jbd2]
jbd2_write_access_granted at fs/jbd2/transaction.c:1155
jbd2_journal_get_write_access+0x2c/0x60 [jbd2]
__ext4_journal_get_write_access+0x50/0x90 [ext4]
ext4_mb_mark_diskspace_used+0x158/0x620 [ext4]
ext4_mb_new_blocks+0x54f/0xca0 [ext4]
ext4_ind_map_blocks+0xc79/0x1b40 [ext4]
ext4_map_blocks+0x3b4/0x950 [ext4]
_ext4_get_block+0xfc/0x270 [ext4]
ext4_get_block+0x3b/0x50 [ext4]
__block_write_begin_int+0x22e/0xae0
__block_write_begin+0x39/0x50
ext4_write_begin+0x388/0xb50 [ext4]
generic_perform_write+0x15d/0x290
ext4_buffered_write_iter+0x11f/0x210 [ext4]
ext4_file_write_iter+0xce/0x9e0 [ext4]
new_sync_write+0x29c/0x3b0
__vfs_write+0x92/0xa0
vfs_write+0x103/0x260
ksys_write+0x9d/0x130
__x64_sys_write+0x4c/0x60
do_syscall_64+0x91/0xb05
entry_SYSCALL_64_after_hwframe+0x49/0xbe
5 locks held by fsync04/25724:
#0: ffff99f9911093f8 (sb_writers#13){.+.+}, at: vfs_write+0x21c/0x260
#1: ffff99f9db4c0348 (&sb->s_type->i_mutex_key#15){+.+.}, at: ext4_buffered_write_iter+0x65/0x210 [ext4]
#2: ffff99f5e7dfcf58 (jbd2_handle){++++}, at: start_this_handle+0x1c1/0x9d0 [jbd2]
#3: ffff99f9db4c0168 (&ei->i_data_sem){++++}, at: ext4_map_blocks+0x176/0x950 [ext4]
#4: ffffffff99086b40 (rcu_read_lock){....}, at: jbd2_write_access_granted+0x4e/0x250 [jbd2]
irq event stamp: 1407125
hardirqs last enabled at (1407125): [<ffffffff980da9b7>] __find_get_block+0x107/0x790
hardirqs last disabled at (1407124): [<ffffffff980da8f9>] __find_get_block+0x49/0x790
softirqs last enabled at (1405528): [<ffffffff98a0034c>] __do_softirq+0x34c/0x57c
softirqs last disabled at (1405521): [<ffffffff97cc67a2>] irq_exit+0xa2/0xc0
Reported by Kernel Concurrency Sanitizer on:
CPU: 68 PID: 25724 Comm: fsync04 Tainted: G L 5.6.0-rc2-next-20200221+ #7
Hardware name: HPE ProLiant DL385 Gen10/ProLiant DL385 Gen10, BIOS A40 07/10/2019
The plain reads are outside of jh->b_state_lock critical section which result
in data races. Fix them by adding pairs of READ|WRITE_ONCE().
Reviewed-by: Jan Kara <[email protected]>
Signed-off-by: Qian Cai <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Theodore Ts'o <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
fs/jbd2/transaction.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 6457023d8fac1..3233e5ac9774f 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -1041,8 +1041,8 @@ static bool jbd2_write_access_granted(handle_t *handle, struct buffer_head *bh,
/* For undo access buffer must have data copied */
if (undo && !jh->b_committed_data)
goto out;
- if (jh->b_transaction != handle->h_transaction &&
- jh->b_next_transaction != handle->h_transaction)
+ if (READ_ONCE(jh->b_transaction) != handle->h_transaction &&
+ READ_ONCE(jh->b_next_transaction) != handle->h_transaction)
goto out;
/*
* There are two reasons for the barrier here:
@@ -2458,8 +2458,8 @@ void __jbd2_journal_refile_buffer(struct journal_head *jh)
* our jh reference and thus __jbd2_journal_file_buffer() must not
* take a new one.
*/
- jh->b_transaction = jh->b_next_transaction;
- jh->b_next_transaction = NULL;
+ WRITE_ONCE(jh->b_transaction, jh->b_next_transaction);
+ WRITE_ONCE(jh->b_next_transaction, NULL);
if (buffer_freed(bh))
jlist = BJ_Forget;
else if (jh->b_modified)
--
2.20.1
From: Linus L?ssing <[email protected]>
commit 54e22f265e872ae140755b3318521d400a094605 upstream.
This patch fixes an issue in the translation table code potentially
leading to a TT Request + Response storm. The issue may occur for nodes
involving BLA and an inconsistent configuration of the batman-adv AP
isolation feature. However, since the new multicast optimizations, a
single, malformed packet may lead to a mesh-wide, persistent
Denial-of-Service, too.
The issue occurs because nodes are currently OR-ing the TT sync flags of
all originators announcing a specific MAC address via the
translation table. When an intermediate node now receives a TT Request
and wants to answer this on behalf of the destination node, then this
intermediate node now responds with an altered flag field and broken
CRC. The next OGM of the real destination will lead to a CRC mismatch
and triggering a TT Request and Response again.
Furthermore, the OR-ing is currently never undone as long as at least
one originator announcing the according MAC address remains, leading to
the potential persistency of this issue.
This patch fixes this issue by storing the flags used in the CRC
calculation on a a per TT orig entry basis to be able to respond with
the correct, original flags in an intermediate TT Response for one
thing. And to be able to correctly unset sync flags once all nodes
announcing a sync flag vanish for another.
Fixes: e9c00136a475 ("batman-adv: fix tt_global_entries flags update")
Signed-off-by: Linus L?ssing <[email protected]>
Acked-by: Antonio Quartulli <[email protected]>
[sw: typo in commit message]
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 55 ++++++++++++++++++++++++++++++++-----
net/batman-adv/types.h | 2 +
2 files changed, 50 insertions(+), 7 deletions(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1263,9 +1263,41 @@ batadv_tt_global_entry_has_orig(const st
return found;
}
+/**
+ * batadv_tt_global_sync_flags - update TT sync flags
+ * @tt_global: the TT global entry to update sync flags in
+ *
+ * Updates the sync flag bits in the tt_global flag attribute with a logical
+ * OR of all sync flags from any of its TT orig entries.
+ */
+static void
+batadv_tt_global_sync_flags(struct batadv_tt_global_entry *tt_global)
+{
+ struct batadv_tt_orig_list_entry *orig_entry;
+ const struct hlist_head *head;
+ u16 flags = BATADV_NO_FLAGS;
+
+ rcu_read_lock();
+ head = &tt_global->orig_list;
+ hlist_for_each_entry_rcu(orig_entry, head, list)
+ flags |= orig_entry->flags;
+ rcu_read_unlock();
+
+ flags |= tt_global->common.flags & (~BATADV_TT_SYNC_MASK);
+ tt_global->common.flags = flags;
+}
+
+/**
+ * batadv_tt_global_orig_entry_add - add or update a TT orig entry
+ * @tt_global: the TT global entry to add an orig entry in
+ * @orig_node: the originator to add an orig entry for
+ * @ttvn: translation table version number of this changeset
+ * @flags: TT sync flags
+ */
static void
batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global,
- struct batadv_orig_node *orig_node, int ttvn)
+ struct batadv_orig_node *orig_node, int ttvn,
+ u8 flags)
{
struct batadv_tt_orig_list_entry *orig_entry;
@@ -1275,7 +1307,8 @@ batadv_tt_global_orig_entry_add(struct b
* was added during a "temporary client detection"
*/
orig_entry->ttvn = ttvn;
- goto out;
+ orig_entry->flags = flags;
+ goto sync_flags;
}
orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC);
@@ -1287,6 +1320,7 @@ batadv_tt_global_orig_entry_add(struct b
batadv_tt_global_size_inc(orig_node, tt_global->common.vid);
orig_entry->orig_node = orig_node;
orig_entry->ttvn = ttvn;
+ orig_entry->flags = flags;
atomic_set(&orig_entry->refcount, 2);
spin_lock_bh(&tt_global->list_lock);
@@ -1295,6 +1329,8 @@ batadv_tt_global_orig_entry_add(struct b
spin_unlock_bh(&tt_global->list_lock);
atomic_inc(&tt_global->orig_list_count);
+sync_flags:
+ batadv_tt_global_sync_flags(tt_global);
out:
if (orig_entry)
batadv_tt_orig_list_entry_free_ref(orig_entry);
@@ -1417,7 +1453,7 @@ static bool batadv_tt_global_add(struct
* TT_CLIENT_WIFI, therefore they have to be copied in the
* client entry
*/
- tt_global_entry->common.flags |= flags;
+ tt_global_entry->common.flags |= flags & (~BATADV_TT_SYNC_MASK);
/* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only
* one originator left in the list and we previously received a
@@ -1434,7 +1470,8 @@ static bool batadv_tt_global_add(struct
}
add_orig_entry:
/* add the new orig_entry (if needed) or update it */
- batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn);
+ batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn,
+ flags & BATADV_TT_SYNC_MASK);
batadv_dbg(BATADV_DBG_TT, bat_priv,
"Creating new global tt entry: %pM (vid: %d, via %pM)\n",
@@ -2087,6 +2124,7 @@ static u32 batadv_tt_global_crc(struct b
unsigned short vid)
{
struct batadv_hashtable *hash = bat_priv->tt.global_hash;
+ struct batadv_tt_orig_list_entry *tt_orig;
struct batadv_tt_common_entry *tt_common;
struct batadv_tt_global_entry *tt_global;
struct hlist_head *head;
@@ -2125,8 +2163,9 @@ static u32 batadv_tt_global_crc(struct b
/* find out if this global entry is announced by this
* originator
*/
- if (!batadv_tt_global_entry_has_orig(tt_global,
- orig_node))
+ tt_orig = batadv_tt_global_orig_entry_find(tt_global,
+ orig_node);
+ if (!tt_orig)
continue;
/* use network order to read the VID: this ensures that
@@ -2138,10 +2177,12 @@ static u32 batadv_tt_global_crc(struct b
/* compute the CRC on flags that have to be kept in sync
* among nodes
*/
- flags = tt_common->flags & BATADV_TT_SYNC_MASK;
+ flags = tt_orig->flags;
crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags));
crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN);
+
+ batadv_tt_orig_list_entry_free_ref(tt_orig);
}
rcu_read_unlock();
}
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -980,6 +980,7 @@ struct batadv_tt_global_entry {
* struct batadv_tt_orig_list_entry - orig node announcing a non-mesh client
* @orig_node: pointer to orig node announcing this non-mesh client
* @ttvn: translation table version number which added the non-mesh client
+ * @flags: per orig entry TT sync flags
* @list: list node for batadv_tt_global_entry::orig_list
* @refcount: number of contexts the object is used
* @rcu: struct used for freeing in an RCU-safe manner
@@ -987,6 +988,7 @@ struct batadv_tt_global_entry {
struct batadv_tt_orig_list_entry {
struct batadv_orig_node *orig_node;
u8 ttvn;
+ u8 flags;
struct hlist_node list;
atomic_t refcount;
struct rcu_head rcu;
From: Sven Eckelmann <[email protected]>
commit 3db152093efb750bc47fd4d69355b90b18113105 upstream.
The batadv_orig_node_vlan reference counter in batadv_tt_global_size_mod
can only be reduced when the list entry was actually removed. Otherwise the
reference counter may reach zero when batadv_tt_global_size_mod is called
from two different contexts for the same orig_node_vlan but only one
context is actually removing the entry from the list.
The release function for this orig_node_vlan is not called inside the
vlan_list_lock spinlock protected region because the function
batadv_tt_global_size_mod still holds a orig_node_vlan reference for the
object pointer on the stack. Thus the actual release function (when
required) will be called only at the end of the function.
Fixes: 7ea7b4a14275 ("batman-adv: make the TT CRC logic VLAN specific")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/translation-table.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -303,9 +303,11 @@ static void batadv_tt_global_size_mod(st
if (atomic_add_return(v, &vlan->tt.num_entries) == 0) {
spin_lock_bh(&orig_node->vlan_list_lock);
- hlist_del_init_rcu(&vlan->list);
+ if (!hlist_unhashed(&vlan->list)) {
+ hlist_del_init_rcu(&vlan->list);
+ batadv_orig_node_vlan_free_ref(vlan);
+ }
spin_unlock_bh(&orig_node->vlan_list_lock);
- batadv_orig_node_vlan_free_ref(vlan);
}
batadv_orig_node_vlan_free_ref(vlan);
From: Eric Dumazet <[email protected]>
commit b6f6118901d1e867ac9177bbff3b00b185bd4fdc upstream.
IPV6_ADDRFORM is able to transform IPv6 socket to IPv4 one.
While this operation sounds illogical, we have to support it.
One of the things it does for TCP socket is to switch sk->sk_prot
to tcp_prot.
We now have other layers playing with sk->sk_prot, so we should make
sure to not interfere with them.
This patch makes sure sk_prot is the default pointer for TCP IPv6 socket.
syzbot reported :
BUG: kernel NULL pointer dereference, address: 0000000000000000
PGD a0113067 P4D a0113067 PUD a8771067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10686 Comm: syz-executor.0 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffffc9000281fce0 EFLAGS: 00010246
RAX: 1ffffffff15f48ac RBX: ffffffff8afa4560 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a69a8f40
RBP: ffffc9000281fd10 R08: ffffffff86ed9b0c R09: ffffed1014d351f5
R10: ffffed1014d351f5 R11: 0000000000000000 R12: ffff8880920d3098
R13: 1ffff1101241a613 R14: ffff8880a69a8f40 R15: 0000000000000000
FS: 00007f2ae75db700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000a3b85000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
inet_release+0x165/0x1c0 net/ipv4/af_inet.c:427
__sock_release net/socket.c:605 [inline]
sock_close+0xe1/0x260 net/socket.c:1283
__fput+0x2e4/0x740 fs/file_table.c:280
____fput+0x15/0x20 fs/file_table.c:313
task_work_run+0x176/0x1b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop arch/x86/entry/common.c:164 [inline]
prepare_exit_to_usermode+0x480/0x5b0 arch/x86/entry/common.c:195
syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278
do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c429
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2ae75dac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: 0000000000000000 RBX: 00007f2ae75db6d4 RCX: 000000000045c429
RDX: 0000000000000001 RSI: 000000000000011a RDI: 0000000000000004
RBP: 000000000076bf20 R08: 0000000000000038 R09: 0000000000000000
R10: 0000000020000180 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a9d R14: 00000000004ccfb4 R15: 000000000076bf2c
Modules linked in:
CR2: 0000000000000000
---[ end trace 82567b5207e87bae ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffffc9000281fce0 EFLAGS: 00010246
RAX: 1ffffffff15f48ac RBX: ffffffff8afa4560 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a69a8f40
RBP: ffffc9000281fd10 R08: ffffffff86ed9b0c R09: ffffed1014d351f5
R10: ffffed1014d351f5 R11: 0000000000000000 R12: ffff8880920d3098
R13: 1ffff1101241a613 R14: ffff8880a69a8f40 R15: 0000000000000000
FS: 00007f2ae75db700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000a3b85000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: Eric Dumazet <[email protected]>
Reported-by: [email protected]
Cc: Daniel Borkmann <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/ipv6/ipv6_sockglue.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -185,9 +185,15 @@ static int do_ipv6_setsockopt(struct soc
retv = -EBUSY;
break;
}
- } else if (sk->sk_protocol != IPPROTO_TCP)
+ } else if (sk->sk_protocol == IPPROTO_TCP) {
+ if (sk->sk_prot != &tcpv6_prot) {
+ retv = -EBUSY;
+ break;
+ }
+ break;
+ } else {
break;
-
+ }
if (sk->sk_state != TCP_ESTABLISHED) {
retv = -ENOTCONN;
break;
From: Zhenzhong Duan <[email protected]>
commit b0bb0c22c4db623f2e7b1a471596fbf1c22c6dc5 upstream.
When base address in RHSA structure doesn't match base address in
each DRHD structure, the base address in last DRHD is printed out.
This doesn't make sense when there are multiple DRHD units, fix it
by printing the buggy RHSA's base address.
Signed-off-by: Lu Baolu <[email protected]>
Signed-off-by: Zhenzhong Duan <[email protected]>
Fixes: fd0c8894893cb ("intel-iommu: Set a more specific taint flag for invalid BIOS DMAR tables")
Signed-off-by: Joerg Roedel <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/iommu/dmar.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -473,7 +473,7 @@ static int dmar_parse_one_rhsa(struct ac
pr_warn(FW_BUG
"Your BIOS is broken; RHSA refers to non-existent DMAR unit at %llx\n"
"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
- drhd->reg_base_addr,
+ rhsa->base_address,
dmi_get_system_info(DMI_BIOS_VENDOR),
dmi_get_system_info(DMI_BIOS_VERSION),
dmi_get_system_info(DMI_PRODUCT_VERSION));
From: Hans de Goede <[email protected]>
commit 81ee85d0462410de8eeeec1b9761941fd6ed8c7b upstream.
Quoting from the comment describing the WARN functions in
include/asm-generic/bug.h:
* WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report
* significant kernel issues that need prompt attention if they should ever
* appear at runtime.
*
* Do not use these macros when checking for invalid external inputs
The (buggy) firmware tables which the dmar code was calling WARN_TAINT
for really are invalid external inputs. They are not under the kernel's
control and the issues in them cannot be fixed by a kernel update.
So logging a backtrace, which invites bug reports to be filed about this,
is not helpful.
Fixes: 556ab45f9a77 ("ioat2: catch and recover from broken vtd configurations v6")
Signed-off-by: Hans de Goede <[email protected]>
Acked-by: Lu Baolu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=701847
Signed-off-by: Joerg Roedel <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/iommu/intel-iommu.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3949,10 +3949,11 @@ static void quirk_ioat_snb_local_iommu(s
/* we know that the this iommu should be at offset 0xa000 from vtbar */
drhd = dmar_find_matched_drhd_unit(pdev);
- if (WARN_TAINT_ONCE(!drhd || drhd->reg_base_addr - vtbar != 0xa000,
- TAINT_FIRMWARE_WORKAROUND,
- "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n"))
+ if (!drhd || drhd->reg_base_addr - vtbar != 0xa000) {
+ pr_warn_once(FW_BUG "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n");
+ add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO;
+ }
}
DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu);
From: Mahesh Bandewar <[email protected]>
[ Upstream commit ce9a4186f9ac475c415ffd20348176a4ea366670 ]
The Rx bound multicast packets are deferred to a workqueue and
macvlan can also suffer from the same attack that was discovered
by Syzbot for IPvlan. This solution is not as effective as in
IPvlan. IPvlan defers all (Tx and Rx) multicast packet processing
to a workqueue while macvlan does this way only for the Rx. This
fix should address the Rx codition to certain extent.
Tx is still suseptible. Tx multicast processing happens when
.ndo_start_xmit is called, hence we cannot add cond_resched().
However, it's not that severe since the user which is generating
/ flooding will be affected the most.
Fixes: 412ca1550cbe ("macvlan: Move broadcasts into a work queue")
Signed-off-by: Mahesh Bandewar <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/macvlan.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -306,6 +306,8 @@ static void macvlan_process_broadcast(st
rcu_read_unlock();
kfree_skb(skb);
+
+ cond_resched();
}
}
From: Sven Eckelmann <[email protected]>
commit 420cb1b764f9169c5d2601b4af90e4a1702345ee upstream.
The untagged vlan object is only destroyed when the interface is removed
via the legacy sysfs interface. But it also has to be destroyed when the
standard rtnl-link interface is used.
Fixes: 5d2c05b21337 ("batman-adv: add per VLAN interface attribute framework")
Signed-off-by: Sven Eckelmann <[email protected]>
Acked-by: Antonio Quartulli <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/soft-interface.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -1000,7 +1000,9 @@ void batadv_softif_destroy_sysfs(struct
static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
struct list_head *head)
{
+ struct batadv_priv *bat_priv = netdev_priv(soft_iface);
struct batadv_hard_iface *hard_iface;
+ struct batadv_softif_vlan *vlan;
list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
if (hard_iface->soft_iface == soft_iface)
@@ -1008,6 +1010,13 @@ static void batadv_softif_destroy_netlin
BATADV_IF_CLEANUP_KEEP);
}
+ /* destroy the "untagged" VLAN */
+ vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
+ if (vlan) {
+ batadv_softif_destroy_vlan(bat_priv, vlan);
+ batadv_softif_vlan_free_ref(vlan);
+ }
+
batadv_sysfs_del_meshif(soft_iface);
unregister_netdevice_queue(soft_iface, head);
}
From: Vladis Dronov <[email protected]>
commit d6c066fda90d578aacdf19771a027ed484a79825 upstream.
Add a sanity check to efivar_store_raw() the same way
efivar_{attr,size,data}_read() and efivar_show_raw() have it.
Signed-off-by: Vladis Dronov <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Cc: <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/firmware/efi/efivars.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -272,6 +272,9 @@ efivar_store_raw(struct efivar_entry *en
u8 *data;
int err;
+ if (!entry || !buf)
+ return -EINVAL;
+
if (is_compat()) {
struct compat_efi_variable *compat;
From: Sven Eckelmann <[email protected]>
commit 10c78f5854d361ded4736c1831948e0a5f67b932 upstream.
vlan_insert_tag can return NULL on errors. The bridge loop avoidance code
therefore has to check the return value of vlan_insert_tag for NULL before
it can safely operate on this pointer.
Fixes: 23721387c409 ("batman-adv: add basic bridge loop avoidance code")
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/batman-adv/bridge_loop_avoidance.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -352,9 +352,12 @@ static void batadv_bla_send_claim(struct
break;
}
- if (vid & BATADV_VLAN_HAS_TAG)
+ if (vid & BATADV_VLAN_HAS_TAG) {
skb = vlan_insert_tag(skb, htons(ETH_P_8021Q),
vid & VLAN_VID_MASK);
+ if (!skb)
+ goto out;
+ }
skb_reset_mac_header(skb);
skb->protocol = eth_type_trans(skb, soft_iface);
From: Colin Ian King <[email protected]>
commit d785476c608c621b345dd9396e8b21e90375cb0e upstream.
Variable grph_obj_type is being assigned twice, one of these is
redundant so remove it.
Addresses-Coverity: ("Evaluation order violation")
Signed-off-by: Colin Ian King <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Cc: <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -346,8 +346,7 @@ bool amdgpu_atombios_get_connector_info_
router.ddc_valid = false;
router.cd_valid = false;
for (j = 0; j < ((le16_to_cpu(path->usSize) - 8) / 2); j++) {
- uint8_t grph_obj_type=
- grph_obj_type =
+ uint8_t grph_obj_type =
(le16_to_cpu(path->usGraphicObjIds[j]) &
OBJECT_TYPE_MASK) >> OBJECT_TYPE_SHIFT;
From: Jakub Kicinski <[email protected]>
[ Upstream commit 7e6dc03eeb023e18427a373522f1d247b916a641 ]
Add missing attribute validation for TCA_FQ_ORPHAN_MASK
to the netlink policy.
Fixes: 06eb395fa985 ("pkt_sched: fq: better control of DDOS traffic")
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/sched/sch_fq.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/sched/sch_fq.c
+++ b/net/sched/sch_fq.c
@@ -668,6 +668,7 @@ static const struct nla_policy fq_policy
[TCA_FQ_FLOW_MAX_RATE] = { .type = NLA_U32 },
[TCA_FQ_BUCKETS_LOG] = { .type = NLA_U32 },
[TCA_FQ_FLOW_REFILL_DELAY] = { .type = NLA_U32 },
+ [TCA_FQ_ORPHAN_MASK] = { .type = NLA_U32 },
};
static int fq_change(struct Qdisc *sch, struct nlattr *opt)
From: Vladis Dronov <[email protected]>
commit 286d3250c9d6437340203fb64938bea344729a0e upstream.
There is a race and a buffer overflow corrupting a kernel memory while
reading an EFI variable with a size more than 1024 bytes via the older
sysfs method. This happens because accessing struct efi_variable in
efivar_{attr,size,data}_read() and friends is not protected from
a concurrent access leading to a kernel memory corruption and, at best,
to a crash. The race scenario is the following:
CPU0: CPU1:
efivar_attr_read()
var->DataSize = 1024;
efivar_entry_get(... &var->DataSize)
down_interruptible(&efivars_lock)
efivar_attr_read() // same EFI var
var->DataSize = 1024;
efivar_entry_get(... &var->DataSize)
down_interruptible(&efivars_lock)
virt_efi_get_variable()
// returns EFI_BUFFER_TOO_SMALL but
// var->DataSize is set to a real
// var size more than 1024 bytes
up(&efivars_lock)
virt_efi_get_variable()
// called with var->DataSize set
// to a real var size, returns
// successfully and overwrites
// a 1024-bytes kernel buffer
up(&efivars_lock)
This can be reproduced by concurrent reading of an EFI variable which size
is more than 1024 bytes:
ts# for cpu in $(seq 0 $(nproc --ignore=1)); do ( taskset -c $cpu \
cat /sys/firmware/efi/vars/KEKDefault*/size & ) ; done
Fix this by using a local variable for a var's data buffer size so it
does not get overwritten.
Fixes: e14ab23dde12b80d ("efivars: efivar_entry API")
Reported-by: Bob Sanders <[email protected]> and the LTP testsuite
Signed-off-by: Vladis Dronov <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Cc: <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/firmware/efi/efivars.c | 29 ++++++++++++++++++++---------
1 file changed, 20 insertions(+), 9 deletions(-)
--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -139,13 +139,16 @@ static ssize_t
efivar_attr_read(struct efivar_entry *entry, char *buf)
{
struct efi_variable *var = &entry->var;
+ unsigned long size = sizeof(var->Data);
char *str = buf;
+ int ret;
if (!entry || !buf)
return -EINVAL;
- var->DataSize = 1024;
- if (efivar_entry_get(entry, &var->Attributes, &var->DataSize, var->Data))
+ ret = efivar_entry_get(entry, &var->Attributes, &size, var->Data);
+ var->DataSize = size;
+ if (ret)
return -EIO;
if (var->Attributes & EFI_VARIABLE_NON_VOLATILE)
@@ -172,13 +175,16 @@ static ssize_t
efivar_size_read(struct efivar_entry *entry, char *buf)
{
struct efi_variable *var = &entry->var;
+ unsigned long size = sizeof(var->Data);
char *str = buf;
+ int ret;
if (!entry || !buf)
return -EINVAL;
- var->DataSize = 1024;
- if (efivar_entry_get(entry, &var->Attributes, &var->DataSize, var->Data))
+ ret = efivar_entry_get(entry, &var->Attributes, &size, var->Data);
+ var->DataSize = size;
+ if (ret)
return -EIO;
str += sprintf(str, "0x%lx\n", var->DataSize);
@@ -189,12 +195,15 @@ static ssize_t
efivar_data_read(struct efivar_entry *entry, char *buf)
{
struct efi_variable *var = &entry->var;
+ unsigned long size = sizeof(var->Data);
+ int ret;
if (!entry || !buf)
return -EINVAL;
- var->DataSize = 1024;
- if (efivar_entry_get(entry, &var->Attributes, &var->DataSize, var->Data))
+ ret = efivar_entry_get(entry, &var->Attributes, &size, var->Data);
+ var->DataSize = size;
+ if (ret)
return -EIO;
memcpy(buf, var->Data, var->DataSize);
@@ -314,14 +323,16 @@ efivar_show_raw(struct efivar_entry *ent
{
struct efi_variable *var = &entry->var;
struct compat_efi_variable *compat;
+ unsigned long datasize = sizeof(var->Data);
size_t size;
+ int ret;
if (!entry || !buf)
return 0;
- var->DataSize = 1024;
- if (efivar_entry_get(entry, &entry->var.Attributes,
- &entry->var.DataSize, entry->var.Data))
+ ret = efivar_entry_get(entry, &var->Attributes, &datasize, var->Data);
+ var->DataSize = datasize;
+ if (ret)
return -EIO;
if (is_compat()) {
From: Jakub Kicinski <[email protected]>
[ Upstream commit 4c16d64ea04056f1b1b324ab6916019f6a064114 ]
Add missing netlink policy entry for FRA_TUN_ID.
Fixes: e7030878fc84 ("fib: Add fib rule match on tunnel id")
Signed-off-by: Jakub Kicinski <[email protected]>
Reviewed-by: David Ahern <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
include/net/fib_rules.h | 1 +
1 file changed, 1 insertion(+)
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -85,6 +85,7 @@ struct fib_rules_ops {
[FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
[FRA_PRIORITY] = { .type = NLA_U32 }, \
[FRA_FWMARK] = { .type = NLA_U32 }, \
+ [FRA_TUN_ID] = { .type = NLA_U64 }, \
[FRA_FWMASK] = { .type = NLA_U32 }, \
[FRA_TABLE] = { .type = NLA_U32 }, \
[FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
From: Jakub Kicinski <[email protected]>
commit 0e1a1d853ecedc99da9d27f9f5c376935547a0e2 upstream.
Add missing attribute validation for critical protocol fields
to the netlink policy.
Fixes: 5de17984898c ("cfg80211: introduce critical protocol indication from user-space")
Signed-off-by: Jakub Kicinski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/wireless/nl80211.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -404,6 +404,8 @@ static const struct nla_policy nl80211_p
[NL80211_ATTR_MDID] = { .type = NLA_U16 },
[NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_DATA_LEN },
+ [NL80211_ATTR_CRIT_PROT_ID] = { .type = NLA_U16 },
+ [NL80211_ATTR_MAX_CRIT_PROT_DURATION] = { .type = NLA_U16 },
[NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
[NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
[NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
From: Linus Torvalds <[email protected]>
[ Upstream commit fda31c50292a5062332fa0343c084bd9f46604d9 ]
When queueing a signal, we increment both the users count of pending
signals (for RLIMIT_SIGPENDING tracking) and we increment the refcount
of the user struct itself (because we keep a reference to the user in
the signal structure in order to correctly account for it when freeing).
That turns out to be fairly expensive, because both of them are atomic
updates, and particularly under extreme signal handling pressure on big
machines, you can get a lot of cache contention on the user struct.
That can then cause horrid cacheline ping-pong when you do these
multiple accesses.
So change the reference counting to only pin the user for the _first_
pending signal, and to unpin it when the last pending signal is
dequeued. That means that when a user sees a lot of concurrent signal
queuing - which is the only situation when this matters - the only
atomic access needed is generally the 'sigpending' count update.
This was noticed because of a particularly odd timing artifact on a
dual-socket 96C/192T Cascade Lake platform: when you get into bad
contention, on that machine for some reason seems to be much worse when
the contention happens in the upper 32-byte half of the cacheline.
As a result, the kernel test robot will-it-scale 'signal1' benchmark had
an odd performance regression simply due to random alignment of the
'struct user_struct' (and pointed to a completely unrelated and
apparently nonsensical commit for the regression).
Avoiding the double increments (and decrements on the dequeueing side,
of course) makes for much less contention and hugely improved
performance on that will-it-scale microbenchmark.
Quoting Feng Tang:
"It makes a big difference, that the performance score is tripled! bump
from original 17000 to 54000. Also the gap between 5.0-rc6 and
5.0-rc6+Jiri's patch is reduced to around 2%"
[ The "2% gap" is the odd cacheline placement difference on that
platform: under the extreme contention case, the effect of which half
of the cacheline was hot was 5%, so with the reduced contention the
odd timing artifact is reduced too ]
It does help in the non-contended case too, but is not nearly as
noticeable.
Reported-and-tested-by: Feng Tang <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: Huang, Ying <[email protected]>
Cc: Philip Li <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
kernel/signal.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/kernel/signal.c b/kernel/signal.c
index 7e4a4b199a117..90a94e54db092 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -373,27 +373,32 @@ __sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, int override_rlimi
{
struct sigqueue *q = NULL;
struct user_struct *user;
+ int sigpending;
/*
* Protect access to @t credentials. This can go away when all
* callers hold rcu read lock.
+ *
+ * NOTE! A pending signal will hold on to the user refcount,
+ * and we get/put the refcount only when the sigpending count
+ * changes from/to zero.
*/
rcu_read_lock();
- user = get_uid(__task_cred(t)->user);
- atomic_inc(&user->sigpending);
+ user = __task_cred(t)->user;
+ sigpending = atomic_inc_return(&user->sigpending);
+ if (sigpending == 1)
+ get_uid(user);
rcu_read_unlock();
- if (override_rlimit ||
- atomic_read(&user->sigpending) <=
- task_rlimit(t, RLIMIT_SIGPENDING)) {
+ if (override_rlimit || likely(sigpending <= task_rlimit(t, RLIMIT_SIGPENDING))) {
q = kmem_cache_alloc(sigqueue_cachep, flags);
} else {
print_dropped_signal(sig);
}
if (unlikely(q == NULL)) {
- atomic_dec(&user->sigpending);
- free_uid(user);
+ if (atomic_dec_and_test(&user->sigpending))
+ free_uid(user);
} else {
INIT_LIST_HEAD(&q->list);
q->flags = 0;
@@ -407,8 +412,8 @@ static void __sigqueue_free(struct sigqueue *q)
{
if (q->flags & SIGQUEUE_PREALLOC)
return;
- atomic_dec(&q->user->sigpending);
- free_uid(q->user);
+ if (atomic_dec_and_test(&q->user->sigpending))
+ free_uid(q->user);
kmem_cache_free(sigqueue_cachep, q);
}
--
2.20.1
On 3/19/20 5:59 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.4.217 release.
> There are 93 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sat, 21 Mar 2020 12:37:04 +0000.
> Anything received after that time might be too late.
>
Build results:
total: 170 pass: 170 fail: 0
Qemu test results:
total: 335 pass: 335 fail: 0
Guenter
Hello Greg,
> From: [email protected] <[email protected]> On
> Behalf Of Greg Kroah-Hartman
> Sent: 19 March 2020 12:59
>
> This is the start of the stable review cycle for the 4.4.217 release.
> There are 93 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
No build issues seen for CIP configs for Linux 4.4.217-rc1 (2f57fed8dba0).
Build logs: https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/pipelines/127779372
Pipeline: https://gitlab.com/cip-project/cip-testing/linux-cip-pipelines/-/blob/master/trees/linux-4.4.y.yml
Kind regards, Chris
>
> Responses should be made by Sat, 21 Mar 2020 12:37:04 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-
> 4.4.217-rc1.gz
> or in the git tree and branch at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> linux-4.4.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
>
> -------------
> Pseudo-Shortlog of commits:
>
> Greg Kroah-Hartman <[email protected]>
> Linux 4.4.217-rc1
>
> Matteo Croce <[email protected]>
> ipv4: ensure rcu_read_lock() in cipso_v4_error()
>
> Jann Horn <[email protected]>
> mm: slub: add missing TID bump in kmem_cache_alloc_bulk()
>
> Kees Cook <[email protected]>
> ARM: 8958/1: rename missed uaccess .fixup section
>
> Florian Fainelli <[email protected]>
> ARM: 8957/1: VDSO: Match ARMv8 timer in cntvct_functional()
>
> Qian Cai <[email protected]>
> jbd2: fix data races at struct journal_head
>
> Linus Torvalds <[email protected]>
> signal: avoid double atomic counter increments for user accounting
>
> Marek Vasut <[email protected]>
> net: ks8851-ml: Fix IRQ handling and locking
>
> Kim Phillips <[email protected]>
> perf/amd/uncore: Replace manual sampling check with CAP_NO_INTERRUPT
> flag
>
> Sven Eckelmann <[email protected]>
> batman-adv: Don't schedule OGM for disabled interface
>
> Sven Eckelmann <[email protected]>
> batman-adv: Avoid free/alloc race when handling OGM buffer
>
> Sven Eckelmann <[email protected]>
> batman-adv: Only read OGM tvlv_len after buffer len check
>
> Sven Eckelmann <[email protected]>
> batman-adv: Reduce tt_global hash refcnt only for removed entry
>
> Sven Eckelmann <[email protected]>
> batman-adv: Reduce tt_local hash refcnt only for removed entry
>
> Sven Eckelmann <[email protected]>
> batman-adv: Reduce claim hash refcnt only for removed entry
>
> Sven Eckelmann <[email protected]>
> batman-adv: Prevent duplicated tvlv handler
>
> Sven Eckelmann <[email protected]>
> batman-adv: Prevent duplicated global TT entry
>
> Sven Eckelmann <[email protected]>
> batman-adv: Prevent duplicated nc_node entry
>
> Sven Eckelmann <[email protected]>
> batman-adv: Prevent duplicated gateway_node entry
>
> Linus Lüssing <[email protected]>
> batman-adv: Avoid storing non-TT-sync flags on singular entries too
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix debugfs path for renamed softif
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix debugfs path for renamed hardif
>
> Marek Lindner <[email protected]>
> batman-adv: prevent TT request storms by not sending inconsistent TT TLVLs
>
> Linus Lüssing <[email protected]>
> batman-adv: Fix TT sync flags for intermediate TT responses
>
> Sven Eckelmann <[email protected]>
> batman-adv: Avoid race in TT TVLV allocator helper
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix skbuff rcsum on packet reroute
>
> Matthias Schiffer <[email protected]>
> batman-adv: update data pointers after skb_cow()
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix internal interface indices types
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix lock for ogm cnt access in batadv_iv_ogm_calc_tq
>
> Linus Lüssing <[email protected]>
> batman-adv: fix TT sync flag inconsistencies
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix rx packet/bytes stats on local ARP reply
>
> Linus Lüssing <[email protected]>
> batman-adv: Fix transmission of final, 16th fragment
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix double free during fragment merge error
>
> Sven Eckelmann <[email protected]>
> batman-adv: Add missing refcnt for last_candidate
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix speedy join in gateway client mode
>
> Sven Eckelmann <[email protected]>
> batman-adv: Free last_bonding_candidate on release of orig_node
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix reference leak in batadv_find_router
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix non-atomic bla_claim::backbone_gw access
>
> Simon Wunderlich <[email protected]>
> batman-adv: lock crc access in bridge loop avoidance
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix orig_node_vlan leak on orig_node_release
>
> Sven Eckelmann <[email protected]>
> batman-adv: Avoid nullptr dereference in dat after vlan_insert_tag
>
> Sven Eckelmann <[email protected]>
> batman-adv: Avoid nullptr dereference in bla after vlan_insert_tag
>
> Sven Eckelmann <[email protected]>
> batman-adv: Clean up untagged vlan when destroying via rtnl-link
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix ICMP RR ethernet access after skb_linearize
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix use-after-free/double-free of tt_req_node
>
> Florian Westphal <[email protected]>
> batman-adv: fix skb deref after free
>
> Linus Lüssing <[email protected]>
> batman-adv: Avoid duplicate neigh_node additions
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix reference counting of vlan object for tt_local_entry
>
> Sven Eckelmann <[email protected]>
> batman-adv: Drop reference to netdevice on last reference
>
> Sven Eckelmann <[email protected]>
> batman-adv: Deactivate TO_BE_ACTIVATED hardif on shutdown
>
> Marek Lindner <[email protected]>
> batman-adv: init neigh node last seen field
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix integer overflow in batadv_iv_ogm_calc_tq
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix unexpected free of bcast_own on add_if error
>
> Andrew Lunn <[email protected]>
> batman-adv: Avoid endless loop in bat-on-bat netdevice check
>
> Sven Eckelmann <[email protected]>
> batman-adv: Only put orig_node_vlan list reference when removed
>
> Sven Eckelmann <[email protected]>
> batman-adv: Only put gw_node list reference when removed
>
> Sven Eckelmann <[email protected]>
> batman-adv: Fix invalid read while copying bat_iv.bcast_own
>
> Vladis Dronov <[email protected]>
> efi: Add a sanity check to efivar_store_raw()
>
> Eric Dumazet <[email protected]>
> ipv6: restrict IPV6_ADDRFORM operation
>
> qize wang <[email protected]>
> mwifiex: Fix heap overflow in mmwifiex_process_tdls_action_frame()
>
> Daniel Drake <[email protected]>
> iommu/vt-d: Ignore devices with out-of-spec domain number
>
> Zhenzhong Duan <[email protected]>
> iommu/vt-d: Fix the wrong printing in RHSA parsing
>
> Jakub Kicinski <[email protected]>
> netfilter: cthelper: add missing attribute validation for cthelper
>
> Jakub Kicinski <[email protected]>
> nl80211: add missing attribute validation for channel switch
>
> Jakub Kicinski <[email protected]>
> nl80211: add missing attribute validation for critical protocol indication
>
> Yonghyun Hwang <[email protected]>
> iommu/vt-d: Fix a bug in intel_iommu_iova_to_phys() for huge page
>
> Hans de Goede <[email protected]>
> iommu/vt-d: dmar: replace WARN_TAINT with pr_warn + add_taint
>
> Vladis Dronov <[email protected]>
> efi: Fix a race and a buffer overflow while reading efivars via sysfs
>
> Eugeniy Paltsev <[email protected]>
> ARC: define __ALIGN_STR and __ALIGN symbols for ARC
>
> Vitaly Kuznetsov <[email protected]>
> KVM: x86: clear stale x86_emulate_ctxt->intercept value
>
> Al Viro <[email protected]>
> gfs2_atomic_open(): fix O_EXCL|O_CREAT handling on cold dcache
>
> Colin Ian King <[email protected]>
> drm/amd/display: remove duplicated assignment to grph_obj_type
>
> Hans de Goede <[email protected]>
> iommu/vt-d: quirk_ioat_snb_local_iommu: replace WARN_TAINT with
> pr_warn + add_taint
>
> Jakub Kicinski <[email protected]>
> net: fq: add missing attribute validation for orphan mask
>
> Eric Dumazet <[email protected]>
> bonding/alb: make sure arp header is pulled before accessing it
>
> Eric Dumazet <[email protected]>
> slip: make slhc_compress() more robust against malicious packets
>
> Jakub Kicinski <[email protected]>
> net: fec: validate the new settings in fec_enet_set_coalesce()
>
> Mahesh Bandewar <[email protected]>
> macvlan: add cond_resched() during multicast processing
>
> Mahesh Bandewar <[email protected]>
> ipvlan: don't deref eth hdr before checking it's set
>
> Eric Dumazet <[email protected]>
> ipvlan: do not use cond_resched_rcu() in ipvlan_process_multicast()
>
> Paolo Abeni <[email protected]>
> ipvlan: egress mcast packets are not exceptional
>
> Jiri Wiesner <[email protected]>
> ipvlan: do not add hardware address of master to its unicast filter list
>
> Mahesh Bandewar <[email protected]>
> ipvlan: add cond_resched_rcu() while processing muticast backlog
>
> Jakub Kicinski <[email protected]>
> nfc: add missing attribute validation for vendor subcommand
>
> Jakub Kicinski <[email protected]>
> nfc: add missing attribute validation for SE API
>
> Jakub Kicinski <[email protected]>
> team: add missing attribute validation for array index
>
> Jakub Kicinski <[email protected]>
> team: add missing attribute validation for port ifindex
>
> Jakub Kicinski <[email protected]>
> nl802154: add missing attribute validation for dev_type
>
> Jakub Kicinski <[email protected]>
> nl802154: add missing attribute validation
>
> Jakub Kicinski <[email protected]>
> fib: add missing attribute validation for tun_id
>
> Vasundhara Volam <[email protected]>
> bnxt_en: reinitialize IRQs when MTU is modified
>
> Dan Carpenter <[email protected]>
> net: nfc: fix bounds checking bugs on "pipe"
>
> You-Sheng Yang <[email protected]>
> r8152: check disconnect status after long sleep
>
> Petr Malat <[email protected]>
> NFS: Remove superfluous kmap in nfs_readdir_xdr_to_array
>
>
> -------------
>
> Diffstat:
>
> Makefile | 4 +-
> arch/arc/include/asm/linkage.h | 2 +
> arch/arm/kernel/vdso.c | 2 +
> arch/arm/lib/copy_from_user.S | 2 +-
> arch/x86/kernel/cpu/perf_event_amd_uncore.c | 16 +-
> arch/x86/kvm/emulate.c | 1 +
> drivers/firmware/efi/efivars.c | 32 +++-
> drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 3 +-
> drivers/iommu/dmar.c | 21 ++-
> drivers/iommu/intel-iommu.c | 13 +-
> drivers/net/bonding/bond_alb.c | 20 +--
> drivers/net/ethernet/broadcom/bnxt/bnxt.c | 4 +-
> drivers/net/ethernet/freescale/fec_main.c | 6 +-
> drivers/net/ethernet/micrel/ks8851_mll.c | 14 +-
> drivers/net/ipvlan/ipvlan_core.c | 19 +-
> drivers/net/ipvlan/ipvlan_main.c | 5 +-
> drivers/net/macvlan.c | 2 +
> drivers/net/slip/slhc.c | 14 +-
> drivers/net/team/team.c | 2 +
> drivers/net/usb/r8152.c | 6 +
> drivers/net/wireless/mwifiex/tdls.c | 70 +++++++-
> fs/gfs2/inode.c | 2 +-
> fs/jbd2/transaction.c | 8 +-
> fs/nfs/dir.c | 2 -
> include/net/fib_rules.h | 1 +
> kernel/signal.c | 23 ++-
> mm/slub.c | 9 +
> net/batman-adv/bat_iv_ogm.c | 115 +++++++++----
> net/batman-adv/bridge_loop_avoidance.c | 152 +++++++++++++---
> net/batman-adv/debugfs.c | 40 +++++
> net/batman-adv/debugfs.h | 11 ++
> net/batman-adv/distributed-arp-table.c | 15 +-
> net/batman-adv/fragmentation.c | 14 +-
> net/batman-adv/gateway_client.c | 18 +-
> net/batman-adv/hard-interface.c | 89 ++++++++--
> net/batman-adv/hard-interface.h | 6 +-
> net/batman-adv/main.c | 8 +-
> net/batman-adv/network-coding.c | 33 ++--
> net/batman-adv/originator.c | 26 ++-
> net/batman-adv/originator.h | 4 +-
> net/batman-adv/routing.c | 111 +++++++++---
> net/batman-adv/send.c | 4 +-
> net/batman-adv/soft-interface.c | 9 +
> net/batman-adv/translation-table.c | 249 ++++++++++++++++++---------
> net/batman-adv/types.h | 23 ++-
> net/ieee802154/nl_policy.c | 6 +
> net/ipv4/cipso_ipv4.c | 7 +-
> net/ipv6/ipv6_sockglue.c | 10 +-
> net/netfilter/nfnetlink_cthelper.c | 2 +
> net/nfc/hci/core.c | 19 +-
> net/nfc/netlink.c | 3 +
> net/sched/sch_fq.c | 1 +
> net/wireless/nl80211.c | 3 +
> 53 files changed, 963 insertions(+), 318 deletions(-)
>
On 3/19/20 6:59 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.4.217 release.
> There are 93 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sat, 21 Mar 2020 12:37:04 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.217-rc1.gz
> or in the git tree and branch at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
>
Compiled and booted on my test system. No dmesg regressions.
thanks,
-- Shuah
On Thu, 19 Mar 2020 at 18:35, Greg Kroah-Hartman
<[email protected]> wrote:
>
> This is the start of the stable review cycle for the 4.4.217 release.
> There are 93 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Sat, 21 Mar 2020 12:37:04 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.217-rc1.gz
> or in the git tree and branch at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
Results from Linaro’s test farm.
No regressions on arm64, arm, x86_64, and i386.
Summary
------------------------------------------------------------------------
kernel: 4.4.217-rc1
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git branch: linux-4.4.y
git commit: 2f57fed8dba0810ba3a6cc7ee0b8018efd4c81ca
git describe: v4.4.216-94-g2f57fed8dba0
Test details: https://qa-reports.linaro.org/lkft/linux-stable-rc-4.4-oe/build/v4.4.216-94-g2f57fed8dba0
No regressions (compared to build v4.4.216)
No fixes (compared to build v4.4.216)
Ran 18231 total tests in the following environments and test suites.
Environments
--------------
- i386
- juno-r2 - arm64
- juno-r2-compat
- juno-r2-kasan
- qemu_arm
- qemu_arm64
- qemu_i386
- qemu_x86_64
- x15 - arm
- x86_64
- x86-kasan
Test Suites
-----------
* build
* kselftest
* libhugetlbfs
* linux-log-parser
* ltp-cap_bounds-tests
* ltp-commands-tests
* ltp-containers-tests
* ltp-cpuhotplug-tests
* ltp-crypto-tests
* ltp-cve-tests
* ltp-dio-tests
* ltp-fcntl-locktests-tests
* ltp-filecaps-tests
* ltp-fs-tests
* ltp-fs_bind-tests
* ltp-fs_perms_simple-tests
* ltp-fsx-tests
* ltp-hugetlb-tests
* ltp-io-tests
* ltp-ipc-tests
* ltp-math-tests
* ltp-mm-tests
* ltp-nptl-tests
* ltp-pty-tests
* ltp-sched-tests
* ltp-securebits-tests
* ltp-syscalls-tests
* network-basic-tests
* perf
* v4l2-compliance
* kvm-unit-tests
* spectre-meltdown-checker-test
* install-android-platform-tools-r2600
* kselftest-vsyscall-mode-native
* kselftest-vsyscall-mode-none
Summary
------------------------------------------------------------------------
kernel: 4.4.217-rc1
git repo: https://git.linaro.org/lkft/arm64-stable-rc.git
git branch: 4.4.217-rc1-hikey-20200319-669
git commit: 7673c791bfb045d15ddf3833701a4af7980de307
git describe: 4.4.217-rc1-hikey-20200319-669
Test details: https://qa-reports.linaro.org/lkft/linaro-hikey-stable-rc-4.4-oe/build/4.4.217-rc1-hikey-20200319-669
No regressions (compared to build 4.4.217-rc1-hikey-20200317-668)
No fixes (compared to build 4.4.217-rc1-hikey-20200317-668)
Ran 1637 total tests in the following environments and test suites.
Environments
--------------
- hi6220-hikey - arm64
Test Suites
-----------
* build
* install-android-platform-tools-r2600
* kselftest
* libhugetlbfs
* linux-log-parser
* ltp-cap_bounds-tests
* ltp-commands-tests
* ltp-containers-tests
* ltp-cpuhotplug-tests
* ltp-dio-tests
* ltp-fcntl-locktests-tests
* ltp-filecaps-tests
* ltp-fs-tests
* ltp-fs_bind-tests
* ltp-fs_perms_simple-tests
* ltp-fsx-tests
* ltp-hugetlb-tests
* ltp-io-tests
* ltp-ipc-tests
* ltp-math-tests
* ltp-mm-tests
* ltp-nptl-tests
* ltp-pty-tests
* ltp-sched-tests
* ltp-securebits-tests
* ltp-syscalls-tests
* perf
* v4l2-compliance
--
Linaro LKFT
https://lkft.linaro.org
On Sat, Mar 21, 2020 at 09:31:32AM +0530, Naresh Kamboju wrote:
> On Thu, 19 Mar 2020 at 18:35, Greg Kroah-Hartman
> <[email protected]> wrote:
> >
> > This is the start of the stable review cycle for the 4.4.217 release.
> > There are 93 patches in this series, all will be posted as a response
> > to this one. If anyone has any issues with these being applied, please
> > let me know.
> >
> > Responses should be made by Sat, 21 Mar 2020 12:37:04 +0000.
> > Anything received after that time might be too late.
> >
> > The whole patch series can be found in one patch at:
> > https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.217-rc1.gz
> > or in the git tree and branch at:
> > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
>
> Results from Linaro’s test farm.
> No regressions on arm64, arm, x86_64, and i386.
Thanks for testing all of these and letting me kow.
greg k-h
On Fri, Mar 20, 2020 at 06:50:52PM -0600, shuah wrote:
> On 3/19/20 6:59 AM, Greg Kroah-Hartman wrote:
> > This is the start of the stable review cycle for the 4.4.217 release.
> > There are 93 patches in this series, all will be posted as a response
> > to this one. If anyone has any issues with these being applied, please
> > let me know.
> >
> > Responses should be made by Sat, 21 Mar 2020 12:37:04 +0000.
> > Anything received after that time might be too late.
> >
> > The whole patch series can be found in one patch at:
> > https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.217-rc1.gz
> > or in the git tree and branch at:
> > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
> >
>
> Compiled and booted on my test system. No dmesg regressions.
Wonderful, thanks for testing them all and letting me know.
greg k-h