Hi,
I'm seeing this on every boot.
Version: Latest mainline (commit ea45ea70b)
Regards,
Srivatsa S. Bhat
---------------------------------------------------------------
BUG: unable to handle kernel paging request at ffff882018552020
IP: [<ffffffffa0366b02>] ip6mr_sk_done+0x32/0xb0 [ipv6]
PGD 290a067 PUD 207ffe0067 PMD 207ff1d067 PTE 8000002018552060
Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
Modules linked in: ebtable_nat ebtables nfs fscache nf_conntrack_ipv4 nf_defrag_ipv4 ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables nfsd lockd nfs_acl exportfs auth_rpcgss autofs4 sunrpc 8021q garp bridge stp llc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 vfat fat vhost_net macvtap macvlan vhost tun kvm_intel kvm uinput iTCO_wdt iTCO_vendor_support cdc_ether usbnet mii microcode i2c_i801 i2c_core lpc_ich mfd_core shpchp ioatdma dca mlx4_core be2net wmi acpi_cpufreq mperf ext4 jbd2 mbcache dm_mirror dm_region_hash dm_log dm_mod
CPU: 0 PID: 7 Comm: kworker/u33:0 Not tainted 3.11.0-rc1-ea45e-a #4
Hardware name: IBM -[8737R2A]-/00Y2738, BIOS -[B2E120RUS-1.20]- 11/30/2012
Workqueue: netns cleanup_net
task: ffff8810393641c0 ti: ffff881039366000 task.ti: ffff881039366000
RIP: 0010:[<ffffffffa0366b02>] [<ffffffffa0366b02>] ip6mr_sk_done+0x32/0xb0 [ipv6]
RSP: 0018:ffff881039367bd8 EFLAGS: 00010286
RAX: ffff881039367fd8 RBX: ffff882018552000 RCX: dead000000200200
RDX: 0000000000000000 RSI: ffff881039367b68 RDI: ffff881039367b68
RBP: ffff881039367bf8 R08: ffff881039367b68 R09: 2222222222222222
R10: 2222222222222222 R11: 2222222222222222 R12: ffff882015a7a040
R13: ffff882014eb89c0 R14: ffff8820289e2800 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88103fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff882018552020 CR3: 0000000001c0b000 CR4: 00000000000407f0
Stack:
ffff881039367c18 ffff882014eb89c0 ffff882015e28c00 0000000000000000
ffff881039367c18 ffffffffa034d9d1 ffff8820289e2800 ffff882014eb89c0
ffff881039367c58 ffffffff815bdecb ffffffff815bddf2 ffff882014eb89c0
Call Trace:
[<ffffffffa034d9d1>] rawv6_close+0x21/0x40 [ipv6]
[<ffffffff815bdecb>] inet_release+0xfb/0x220
[<ffffffff815bddf2>] ? inet_release+0x22/0x220
[<ffffffffa032686f>] inet6_release+0x3f/0x50 [ipv6]
[<ffffffff8151c1d9>] sock_release+0x29/0xa0
[<ffffffff81525520>] sk_release_kernel+0x30/0x70
[<ffffffffa034f14b>] icmpv6_sk_exit+0x3b/0x80 [ipv6]
[<ffffffff8152fff9>] ops_exit_list+0x39/0x60
[<ffffffff815306fb>] cleanup_net+0xfb/0x1a0
[<ffffffff81075e3a>] process_one_work+0x1da/0x610
[<ffffffff81075dc9>] ? process_one_work+0x169/0x610
[<ffffffff81076390>] worker_thread+0x120/0x3a0
[<ffffffff81076270>] ? process_one_work+0x610/0x610
[<ffffffff8107da2e>] kthread+0xee/0x100
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
[<ffffffff8162a99c>] ret_from_fork+0x7c/0xb0
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
Code: 20 48 89 5d e8 4c 89 65 f0 4c 89 6d f8 66 66 66 66 90 4c 8b 67 30 49 89 fd e8 db 3c 1e e1 49 8b 9c 24 90 08 00 00 48 85 db 74 06 <4c> 39 6b 20 74 20 bb f3 ff ff ff e8 8e 3c 1e e1 89 d8 4c 8b 65
RIP [<ffffffffa0366b02>] ip6mr_sk_done+0x32/0xb0 [ipv6]
RSP <ffff881039367bd8>
CR2: ffff882018552020
---[ end trace e8367f5addd58b5f ]---
BUG: sleeping function called from invalid context at kernel/rwsem.c:20
in_atomic(): 0, irqs_disabled(): 1, pid: 7, name: kworker/u33:0
INFO: lockdep is turned off.
irq event stamp: 7804
hardirqs last enabled at (7803): [<ffffffff81620ad0>] _raw_spin_unlock_irq+0x30/0x50
hardirqs last disabled at (7804): [<ffffffff81620287>] _raw_spin_lock_irq+0x17/0x60
softirqs last enabled at (7122): [<ffffffff81058ea6>] __do_softirq+0x1e6/0x400
softirqs last disabled at (7113): [<ffffffff8105921d>] irq_exit+0xed/0x100
CPU: 0 PID: 7 Comm: kworker/u33:0 Tainted: G D 3.11.0-rc1-ea45e-a #4
Hardware name: IBM -[8737R2A]-/00Y2738, BIOS -[B2E120RUS-1.20]- 11/30/2012
Workqueue: netns cleanup_net
ffffffff819f4a61 ffff881039367828 ffffffff8161ab9c ffff881039367828
ffff8810393641c0 ffff881039367858 ffffffff8108cbee ffff881039367898
ffff881039357ec8 0000000000000009 0000000000000009 ffff881039367888
Call Trace:
[<ffffffff8161ab9c>] dump_stack+0x59/0x7d
[<ffffffff8108cbee>] __might_sleep+0x17e/0x230
[<ffffffff8161d7b4>] down_read+0x24/0x70
[<ffffffff81068404>] exit_signals+0x24/0x140
[<ffffffff81084b36>] ? blocking_notifier_call_chain+0x16/0x20
[<ffffffff81055ee2>] do_exit+0xb2/0x4c0
[<ffffffff81621f49>] oops_end+0xa9/0xf0
[<ffffffff81042e0e>] no_context+0x11e/0x1f0
[<ffffffff8104300d>] __bad_area_nosemaphore+0x12d/0x230
[<ffffffff81043123>] bad_area_nosemaphore+0x13/0x20
[<ffffffff81624f13>] __do_page_fault+0x133/0x4e0
[<ffffffff8104467b>] ? __change_page_attr+0x6b/0x2b0
[<ffffffff8104490d>] ? __change_page_attr_set_clr+0x4d/0xb0
[<ffffffff816252f7>] do_page_fault+0x37/0x70
[<ffffffff8162108c>] ? restore_args+0x30/0x30
[<ffffffff81621262>] page_fault+0x22/0x30
[<ffffffffa0366b02>] ? ip6mr_sk_done+0x32/0xb0 [ipv6]
[<ffffffffa0366af5>] ? ip6mr_sk_done+0x25/0xb0 [ipv6]
[<ffffffffa034d9d1>] rawv6_close+0x21/0x40 [ipv6]
[<ffffffff815bdecb>] inet_release+0xfb/0x220
[<ffffffff815bddf2>] ? inet_release+0x22/0x220
[<ffffffffa032686f>] inet6_release+0x3f/0x50 [ipv6]
[<ffffffff8151c1d9>] sock_release+0x29/0xa0
[<ffffffff81525520>] sk_release_kernel+0x30/0x70
[<ffffffffa034f14b>] icmpv6_sk_exit+0x3b/0x80 [ipv6]
[<ffffffff8152fff9>] ops_exit_list+0x39/0x60
[<ffffffff815306fb>] cleanup_net+0xfb/0x1a0
[<ffffffff81075e3a>] process_one_work+0x1da/0x610
[<ffffffff81075dc9>] ? process_one_work+0x169/0x610
[<ffffffff81076390>] worker_thread+0x120/0x3a0
[<ffffffff81076270>] ? process_one_work+0x610/0x610
[<ffffffff8107da2e>] kthread+0xee/0x100
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
[<ffffffff8162a99c>] ret_from_fork+0x7c/0xb0
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
BUG: unable to handle kernel paging request at ffffffffffffffa8
IP: [<ffffffff8107d020>] kthread_data+0x10/0x20
PGD 1c0c067 PUD 1c0e067 PMD 0
Oops: 0000 [#2] SMP DEBUG_PAGEALLOC
Modules linked in: ebtable_nat ebtables nfs fscache nf_conntrack_ipv4 nf_defrag_ipv4 ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables nfsd lockd nfs_acl exportfs auth_rpcgss autofs4 sunrpc 8021q garp bridge stp llc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 vfat fat vhost_net macvtap macvlan vhost tun kvm_intel kvm uinput iTCO_wdt iTCO_vendor_support cdc_ether usbnet mii microcode i2c_i801 i2c_core lpc_ich mfd_core shpchp ioatdma dca mlx4_core be2net wmi acpi_cpufreq mperf ext4 jbd2 mbcache dm_mirror dm_region_hash dm_log dm_mod
CPU: 6 PID: 7 Comm: kworker/u33:0 Tainted: G D 3.11.0-rc1-ea45e-a #4
Hardware name: IBM -[8737R2A]-/00Y2738, BIOS -[B2E120RUS-1.20]- 11/30/2012
task: ffff8810393641c0 ti: ffff881039366000 task.ti: ffff881039366000
RIP: 0010:[<ffffffff8107d020>] [<ffffffff8107d020>] kthread_data+0x10/0x20
RSP: 0018:ffff8810393677f8 EFLAGS: 00010092
RAX: 0000000000000000 RBX: 0000000000000006 RCX: ffffffff81ff6ea0
RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8810393641c0
RBP: ffff8810393677f8 R08: ffff881039364230 R09: 000000000000bdde
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000006
R13: ffff8810393647d8 R14: 0000000000000001 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88103fd80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000028 CR3: 0000000001c0b000 CR4: 00000000000407e0
Stack:
ffff881039367818 ffffffff81070d85 ffff881039367818 ffff88103fd93c00
ffff8810393678a8 ffffffff8161e40b ffff881039367858 ffff881039366000
ffff881039367fd8 ffff881039366000 ffff881039366010 ffff881039366000
Call Trace:
[<ffffffff81070d85>] wq_worker_sleeping+0x15/0xa0
[<ffffffff8161e40b>] __schedule+0x6cb/0x860
[<ffffffff8161e799>] schedule+0x29/0x70
[<ffffffff81056105>] do_exit+0x2d5/0x4c0
[<ffffffff81621f49>] oops_end+0xa9/0xf0
[<ffffffff81042e0e>] no_context+0x11e/0x1f0
[<ffffffff8104300d>] __bad_area_nosemaphore+0x12d/0x230
[<ffffffff81043123>] bad_area_nosemaphore+0x13/0x20
[<ffffffff81624f13>] __do_page_fault+0x133/0x4e0
[<ffffffff8104467b>] ? __change_page_attr+0x6b/0x2b0
[<ffffffff8104490d>] ? __change_page_attr_set_clr+0x4d/0xb0
[<ffffffff816252f7>] do_page_fault+0x37/0x70
[<ffffffff8162108c>] ? restore_args+0x30/0x30
[<ffffffff81621262>] page_fault+0x22/0x30
[<ffffffffa0366b02>] ? ip6mr_sk_done+0x32/0xb0 [ipv6]
[<ffffffffa0366af5>] ? ip6mr_sk_done+0x25/0xb0 [ipv6]
[<ffffffffa034d9d1>] rawv6_close+0x21/0x40 [ipv6]
[<ffffffff815bdecb>] inet_release+0xfb/0x220
[<ffffffff815bddf2>] ? inet_release+0x22/0x220
[<ffffffffa032686f>] inet6_release+0x3f/0x50 [ipv6]
[<ffffffff8151c1d9>] sock_release+0x29/0xa0
[<ffffffff81525520>] sk_release_kernel+0x30/0x70
[<ffffffffa034f14b>] icmpv6_sk_exit+0x3b/0x80 [ipv6]
[<ffffffff8152fff9>] ops_exit_list+0x39/0x60
[<ffffffff815306fb>] cleanup_net+0xfb/0x1a0
[<ffffffff81075e3a>] process_one_work+0x1da/0x610
[<ffffffff81075dc9>] ? process_one_work+0x169/0x610
[<ffffffff81076390>] worker_thread+0x120/0x3a0
[<ffffffff81076270>] ? process_one_work+0x610/0x610
[<ffffffff8107da2e>] kthread+0xee/0x100
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
[<ffffffff8162a99c>] ret_from_fork+0x7c/0xb0
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
Code: 70 05 00 00 48 8b 40 98 c9 48 c1 e8 02 83 e0 01 c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 66 66 66 66 90 48 8b 87 70 05 00 00 <48> 8b 40 a8 c9 c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 66
RIP [<ffffffff8107d020>] kthread_data+0x10/0x20
RSP <ffff8810393677f8>
CR2: ffffffffffffffa8
---[ end trace e8367f5addd58b60 ]---
Fixing recursive fault but reboot is needed!
On Sun, Jul 21, 2013 at 11:58:13PM +0530, Srivatsa S. Bhat wrote:
> I'm seeing this on every boot.
>
> Version: Latest mainline (commit ea45ea70b)
Thanks for the report! Could you try the following patch?
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 583e8d4..373906c 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1601,9 +1601,9 @@ int ip6mr_sk_done(struct sock *sk)
struct mr6_table *mrt;
rtnl_lock();
+ write_lock_bh(&mrt_lock);
ip6mr_for_each_table(mrt, net) {
if (sk == mrt->mroute6_sk) {
- write_lock_bh(&mrt_lock);
mrt->mroute6_sk = NULL;
net->ipv6.devconf_all->mc_forwarding--;
inet6_netconf_notify_devconf(net,
@@ -1611,14 +1611,14 @@ int ip6mr_sk_done(struct sock *sk)
NETCONFA_IFINDEX_ALL,
net->ipv6.devconf_all);
write_unlock_bh(&mrt_lock);
-
mroute_clean_tables(mrt);
err = 0;
- break;
+ goto out;
}
}
+ write_unlock_bh(&mrt_lock);
+out:
rtnl_unlock();
-
return err;
}
On 07/22/2013 02:23 AM, Hannes Frederic Sowa wrote:
> On Sun, Jul 21, 2013 at 11:58:13PM +0530, Srivatsa S. Bhat wrote:
>> I'm seeing this on every boot.
>>
>> Version: Latest mainline (commit ea45ea70b)
>
> Thanks for the report! Could you try the following patch?
>
That didn't seem to help :-(
Below is the new trace (not much different than the old one).
Regards,
Srivatsa S. Bhat
-----------------------------------------------------------------------
BUG: unable to handle kernel paging request at ffff881029d8b020
IP: [<ffffffffa0366b0e>] ip6mr_sk_done+0x3e/0xc0 [ipv6]
PGD 290a067 PUD 207fbff067 PMD 207fab0067 PTE 8000001029d8b060
Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
Modules linked in: ebtable_nat ebtables nfs fscache nf_conntrack_ipv4 nf_defrag_ipv4 ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables nfsd lockd nfs_acl exportfs auth_rpcgss autofs4 sunrpc 8021q garp bridge stp llc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 vfat fat vhost_net macvtap macvlan vhost tun kvm_intel kvm uinput iTCO_wdt iTCO_vendor_support cdc_ether usbnet mii microcode i2c_i801 i2c_core lpc_ich mfd_core shpchp mlx4_core ioatdma dca be2net wmi acpi_cpufreq mperf ext4 jbd2 mbcache dm_mirror dm_region_hash dm_log dm_mod
CPU: 9 PID: 52 Comm: kworker/u34:0 Not tainted 3.11.0-rc1-ip6fix-a #14
Hardware name: IBM -[8737R2A]-/00Y2738, BIOS -[B2E120RUS-1.20]- 11/30/2012
Workqueue: netns cleanup_net
task: ffff882028482180 ti: ffff882028484000 task.ti: ffff882028484000
RIP: 0010:[<ffffffffa0366b0e>] [<ffffffffa0366b0e>] ip6mr_sk_done+0x3e/0xc0 [ipv6]
RSP: 0018:ffff882028485bd8 EFLAGS: 00010286
RAX: ffff882028482180 RBX: ffff881029d8b000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa03785a4
RBP: ffff882028485bf8 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 2222222222222222 R12: ffff88102492c040
R13: ffff880ff65399c0 R14: ffff882028463800 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88206fc40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff881029d8b020 CR3: 0000000001c0b000 CR4: 00000000000407e0
Stack:
ffff882028485c18 ffff880ff65399c0 ffff88102c867c00 0000000000000000
ffff882028485c18 ffffffffa034d9d1 ffff882028463800 ffff880ff65399c0
ffff882028485c58 ffffffff815bdecb ffffffff815bddf2 ffff880ff65399c0
Call Trace:
[<ffffffffa034d9d1>] rawv6_close+0x21/0x40 [ipv6]
[<ffffffff815bdecb>] inet_release+0xfb/0x220
[<ffffffff815bddf2>] ? inet_release+0x22/0x220
[<ffffffffa032686f>] inet6_release+0x3f/0x50 [ipv6]
[<ffffffff8151c1d9>] sock_release+0x29/0xa0
[<ffffffff81525520>] sk_release_kernel+0x30/0x70
[<ffffffffa034f14b>] icmpv6_sk_exit+0x3b/0x80 [ipv6]
[<ffffffff8152fff9>] ops_exit_list+0x39/0x60
[<ffffffff815306fb>] cleanup_net+0xfb/0x1a0
[<ffffffff81075e3a>] process_one_work+0x1da/0x610
[<ffffffff81075dc9>] ? process_one_work+0x169/0x610
[<ffffffff81076390>] worker_thread+0x120/0x3a0
[<ffffffff81076270>] ? process_one_work+0x610/0x610
[<ffffffff8107da2e>] kthread+0xee/0x100
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
[<ffffffff8162a99c>] ret_from_fork+0x7c/0xb0
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
Code: f8 66 66 66 66 90 4c 8b 67 30 49 89 fd e8 db 3c 1e e1 48 c7 c7 a0 85 37 a0 e8 ef 99 2b e1 49 8b 9c 24 90 08 00 00 48 85 db 74 06 <4c> 39 6b 20 74 2c 48 c7 c7 a0 85 37 a0 bb f3 ff ff ff e8 5b 98
RIP [<ffffffffa0366b0e>] ip6mr_sk_done+0x3e/0xc0 [ipv6]
RSP <ffff882028485bd8>
CR2: ffff881029d8b020
---[ end trace fef188ae87dec56e ]---
Kernel panic - not syncing: Fatal exception in interrupt
------------[ cut here ]------------
WARNING: CPU: 9 PID: 52 at arch/x86/kernel/smp.c:124 native_smp_send_reschedule+0x5c/0x60()
Modules linked in: ebtable_nat ebtables nfs fscache nf_conntrack_ipv4 nf_defrag_ipv4 ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables nfsd lockd nfs_acl exportfs auth_rpcgss autofs4 sunrpc 8021q garp bridge stp llc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 vfat fat vhost_net macvtap macvlan vhost tun kvm_intel kvm uinput iTCO_wdt iTCO_vendor_support cdc_ether usbnet mii microcode i2c_i801 i2c_core lpc_ich mfd_core shpchp mlx4_core ioatdma dca be2net wmi acpi_cpufreq mperf ext4 jbd2 mbcache dm_mirror dm_region_hash dm_log dm_mod
CPU: 9 PID: 52 Comm: kworker/u34:0 Tainted: G D 3.11.0-rc1-ip6fix-a #14
Hardware name: IBM -[8737R2A]-/00Y2738, BIOS -[B2E120RUS-1.20]- 11/30/2012
Workqueue: netns cleanup_net
000000000000007c ffff88206fc43d08 ffffffff8161ab9c ffffffff819dd1d6
0000000000000000 ffff88206fc43d48 ffffffff8104e6ac ffffffff8109e7df
0000000000000008 0000000000000008 00000000fffcef4c 0000000000000009
Call Trace:
<IRQ> [<ffffffff8161ab9c>] dump_stack+0x59/0x7d
[<ffffffff8104e6ac>] warn_slowpath_common+0x8c/0xc0
[<ffffffff8109e7df>] ? trigger_load_balance+0x11f/0x520
[<ffffffff8104e6fa>] warn_slowpath_null+0x1a/0x20
[<ffffffff81030f6c>] native_smp_send_reschedule+0x5c/0x60
[<ffffffff8109ea65>] trigger_load_balance+0x3a5/0x520
[<ffffffff8109e73f>] ? trigger_load_balance+0x7f/0x520
[<ffffffff8108b39f>] scheduler_tick+0xaf/0xf0
[<ffffffff81060a79>] update_process_times+0x69/0x80
[<ffffffff81081ecf>] ? __run_hrtimer+0x6f/0x2e0
[<ffffffff810bb859>] tick_sched_handle+0x39/0x80
[<ffffffff810bba84>] tick_sched_timer+0x54/0x90
[<ffffffff81081ee3>] __run_hrtimer+0x83/0x2e0
[<ffffffff810bba30>] ? tick_nohz_handler+0xc0/0xc0
[<ffffffff81082426>] hrtimer_interrupt+0x116/0x2a0
[<ffffffff8103467b>] local_apic_timer_interrupt+0x3b/0x60
[<ffffffff8162ca45>] smp_apic_timer_interrupt+0x45/0x60
[<ffffffff8162b6af>] apic_timer_interrupt+0x6f/0x80
<EOI> [<ffffffff8161a9d2>] ? panic+0x19c/0x1e2
[<ffffffff8161a9d5>] ? panic+0x19f/0x1e2
[<ffffffff8161a9d2>] ? panic+0x19c/0x1e2
[<ffffffff81052628>] ? kmsg_dump+0x1d8/0x2a0
[<ffffffff81052476>] ? kmsg_dump+0x26/0x2a0
[<ffffffff81052610>] ? kmsg_dump+0x1c0/0x2a0
[<ffffffff81621f8a>] oops_end+0xea/0xf0
[<ffffffff81042e0e>] no_context+0x11e/0x1f0
[<ffffffff8104300d>] __bad_area_nosemaphore+0x12d/0x230
[<ffffffff81043123>] bad_area_nosemaphore+0x13/0x20
[<ffffffff81624f13>] __do_page_fault+0x133/0x4e0
[<ffffffff8104467b>] ? __change_page_attr+0x6b/0x2b0
[<ffffffff8104490d>] ? __change_page_attr_set_clr+0x4d/0xb0
[<ffffffff816252f7>] do_page_fault+0x37/0x70
[<ffffffff8162108c>] ? restore_args+0x30/0x30
[<ffffffff81621262>] page_fault+0x22/0x30
[<ffffffffa0366b0e>] ? ip6mr_sk_done+0x3e/0xc0 [ipv6]
[<ffffffffa0366b01>] ? ip6mr_sk_done+0x31/0xc0 [ipv6]
[<ffffffffa034d9d1>] rawv6_close+0x21/0x40 [ipv6]
[<ffffffff815bdecb>] inet_release+0xfb/0x220
[<ffffffff815bddf2>] ? inet_release+0x22/0x220
[<ffffffffa032686f>] inet6_release+0x3f/0x50 [ipv6]
[<ffffffff8151c1d9>] sock_release+0x29/0xa0
[<ffffffff81525520>] sk_release_kernel+0x30/0x70
[<ffffffffa034f14b>] icmpv6_sk_exit+0x3b/0x80 [ipv6]
[<ffffffff8152fff9>] ops_exit_list+0x39/0x60
[<ffffffff815306fb>] cleanup_net+0xfb/0x1a0
[<ffffffff81075e3a>] process_one_work+0x1da/0x610
[<ffffffff81075dc9>] ? process_one_work+0x169/0x610
[<ffffffff81076390>] worker_thread+0x120/0x3a0
[<ffffffff81076270>] ? process_one_work+0x610/0x610
[<ffffffff8107da2e>] kthread+0xee/0x100
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
[<ffffffff8162a99c>] ret_from_fork+0x7c/0xb0
[<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
---[ end trace fef188ae87dec56f ]---
On Mon, Jul 22, 2013 at 02:40:35AM +0530, Srivatsa S. Bhat wrote:
> On 07/22/2013 02:23 AM, Hannes Frederic Sowa wrote:
> > On Sun, Jul 21, 2013 at 11:58:13PM +0530, Srivatsa S. Bhat wrote:
> >> I'm seeing this on every boot.
> >>
> >> Version: Latest mainline (commit ea45ea70b)
> >
> > Thanks for the report! Could you try the following patch?
> >
>
> That didn't seem to help :-(
>
> Below is the new trace (not much different than the old one).
Ok, thanks. Do you have CONFIG_IPV6_MROUTE_MULTIPLE_TABLES enabled?
On 07/22/2013 02:57 AM, Hannes Frederic Sowa wrote:
> On Mon, Jul 22, 2013 at 02:40:35AM +0530, Srivatsa S. Bhat wrote:
>> On 07/22/2013 02:23 AM, Hannes Frederic Sowa wrote:
>>> On Sun, Jul 21, 2013 at 11:58:13PM +0530, Srivatsa S. Bhat wrote:
>>>> I'm seeing this on every boot.
>>>>
>>>> Version: Latest mainline (commit ea45ea70b)
>>>
>>> Thanks for the report! Could you try the following patch?
>>>
>>
>> That didn't seem to help :-(
>>
>> Below is the new trace (not much different than the old one).
>
> Ok, thanks. Do you have CONFIG_IPV6_MROUTE_MULTIPLE_TABLES enabled?
>
No.
Here are the relevant config options from my .config:
CONFIG_IPV6=m
CONFIG_IPV6_PRIVACY=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
CONFIG_IPV6_OPTIMISTIC_DAD=y
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
# CONFIG_INET6_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET6_XFRM_MODE_TUNNEL is not set
# CONFIG_INET6_XFRM_MODE_BEET is not set
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
# CONFIG_IPV6_SIT is not set
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_IPV6_GRE is not set
CONFIG_IPV6_MULTIPLE_TABLES=y
# CONFIG_IPV6_SUBTREES is not set
CONFIG_IPV6_MROUTE=y
# CONFIG_IPV6_MROUTE_MULTIPLE_TABLES is not set
CONFIG_IPV6_PIMSM_V2=y
CONFIG_NETLABEL=y
CONFIG_NETWORK_SECMARK=y
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
CONFIG_NETFILTER_ADVANCED=y
CONFIG_BRIDGE_NETFILTER=y
Regards,
Srivatsa S. Bhat
Hallo Srivatsa
On 2013年07月22日 02:28, Srivatsa S. Bhat wrote:
> Hi,
>
> I'm seeing this on every boot.
>
> Version: Latest mainline (commit ea45ea70b)
I tested with this commit using your updated IPv6 config, this incident didn't show up after several times of reboot.
Could you please elaborate your testing details if possible?
A wild guess, it dereference mrt->mroute6_sk, indicating mrt is invalid.
> Regards,
> Srivatsa S. Bhat
>
> ---------------------------------------------------------------
>
> BUG: unable to handle kernel paging request at ffff882018552020
> IP: [<ffffffffa0366b02>] ip6mr_sk_done+0x32/0xb0 [ipv6]
> PGD 290a067 PUD 207ffe0067 PMD 207ff1d067 PTE 8000002018552060
> Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
> Modules linked in: ebtable_nat ebtables nfs fscache nf_conntrack_ipv4 nf_defrag_ipv4 ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables nfsd lockd nfs_acl exportfs auth_rpcgss autofs4 sunrpc 8021q garp bridge stp llc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 vfat fat vhost_net macvtap macvlan vhost tun kvm_intel kvm uinput iTCO_wdt iTCO_vendor_support cdc_ether usbnet mii microcode i2c_i801 i2c_core lpc_ich mfd_core shpchp ioatdma dca mlx4_core be2net wmi acpi_cpufreq mperf ext4 jbd2 mbcache dm_mirror dm_region_hash dm_log dm_mod
> CPU: 0 PID: 7 Comm: kworker/u33:0 Not tainted 3.11.0-rc1-ea45e-a #4
> Hardware name: IBM -[8737R2A]-/00Y2738, BIOS -[B2E120RUS-1.20]- 11/30/2012
> Workqueue: netns cleanup_net
> task: ffff8810393641c0 ti: ffff881039366000 task.ti: ffff881039366000
> RIP: 0010:[<ffffffffa0366b02>] [<ffffffffa0366b02>] ip6mr_sk_done+0x32/0xb0 [ipv6]
> RSP: 0018:ffff881039367bd8 EFLAGS: 00010286
> RAX: ffff881039367fd8 RBX: ffff882018552000 RCX: dead000000200200
> RDX: 0000000000000000 RSI: ffff881039367b68 RDI: ffff881039367b68
> RBP: ffff881039367bf8 R08: ffff881039367b68 R09: 2222222222222222
> R10: 2222222222222222 R11: 2222222222222222 R12: ffff882015a7a040
> R13: ffff882014eb89c0 R14: ffff8820289e2800 R15: 0000000000000000
> FS: 0000000000000000(0000) GS:ffff88103fc00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffff882018552020 CR3: 0000000001c0b000 CR4: 00000000000407f0
> Stack:
> ffff881039367c18 ffff882014eb89c0 ffff882015e28c00 0000000000000000
> ffff881039367c18 ffffffffa034d9d1 ffff8820289e2800 ffff882014eb89c0
> ffff881039367c58 ffffffff815bdecb ffffffff815bddf2 ffff882014eb89c0
> Call Trace:
> [<ffffffffa034d9d1>] rawv6_close+0x21/0x40 [ipv6]
> [<ffffffff815bdecb>] inet_release+0xfb/0x220
> [<ffffffff815bddf2>] ? inet_release+0x22/0x220
> [<ffffffffa032686f>] inet6_release+0x3f/0x50 [ipv6]
> [<ffffffff8151c1d9>] sock_release+0x29/0xa0
> [<ffffffff81525520>] sk_release_kernel+0x30/0x70
> [<ffffffffa034f14b>] icmpv6_sk_exit+0x3b/0x80 [ipv6]
> [<ffffffff8152fff9>] ops_exit_list+0x39/0x60
> [<ffffffff815306fb>] cleanup_net+0xfb/0x1a0
> [<ffffffff81075e3a>] process_one_work+0x1da/0x610
> [<ffffffff81075dc9>] ? process_one_work+0x169/0x610
> [<ffffffff81076390>] worker_thread+0x120/0x3a0
> [<ffffffff81076270>] ? process_one_work+0x610/0x610
> [<ffffffff8107da2e>] kthread+0xee/0x100
> [<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
> [<ffffffff8162a99c>] ret_from_fork+0x7c/0xb0
> [<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
> Code: 20 48 89 5d e8 4c 89 65 f0 4c 89 6d f8 66 66 66 66 90 4c 8b 67 30 49 89 fd e8 db 3c 1e e1 49 8b 9c 24 90 08 00 00 48 85 db 74 06<4c> 39 6b 20 74 20 bb f3 ff ff ff e8 8e 3c 1e e1 89 d8 4c 8b 65
> RIP [<ffffffffa0366b02>] ip6mr_sk_done+0x32/0xb0 [ipv6]
> RSP<ffff881039367bd8>
> CR2: ffff882018552020
> ---[ end trace e8367f5addd58b5f ]---
> BUG: sleeping function called from invalid context at kernel/rwsem.c:20
> in_atomic(): 0, irqs_disabled(): 1, pid: 7, name: kworker/u33:0
> INFO: lockdep is turned off.
> irq event stamp: 7804
> hardirqs last enabled at (7803): [<ffffffff81620ad0>] _raw_spin_unlock_irq+0x30/0x50
> hardirqs last disabled at (7804): [<ffffffff81620287>] _raw_spin_lock_irq+0x17/0x60
> softirqs last enabled at (7122): [<ffffffff81058ea6>] __do_softirq+0x1e6/0x400
> softirqs last disabled at (7113): [<ffffffff8105921d>] irq_exit+0xed/0x100
> CPU: 0 PID: 7 Comm: kworker/u33:0 Tainted: G D 3.11.0-rc1-ea45e-a #4
> Hardware name: IBM -[8737R2A]-/00Y2738, BIOS -[B2E120RUS-1.20]- 11/30/2012
> Workqueue: netns cleanup_net
> ffffffff819f4a61 ffff881039367828 ffffffff8161ab9c ffff881039367828
> ffff8810393641c0 ffff881039367858 ffffffff8108cbee ffff881039367898
> ffff881039357ec8 0000000000000009 0000000000000009 ffff881039367888
> Call Trace:
> [<ffffffff8161ab9c>] dump_stack+0x59/0x7d
> [<ffffffff8108cbee>] __might_sleep+0x17e/0x230
> [<ffffffff8161d7b4>] down_read+0x24/0x70
> [<ffffffff81068404>] exit_signals+0x24/0x140
> [<ffffffff81084b36>] ? blocking_notifier_call_chain+0x16/0x20
> [<ffffffff81055ee2>] do_exit+0xb2/0x4c0
> [<ffffffff81621f49>] oops_end+0xa9/0xf0
> [<ffffffff81042e0e>] no_context+0x11e/0x1f0
> [<ffffffff8104300d>] __bad_area_nosemaphore+0x12d/0x230
> [<ffffffff81043123>] bad_area_nosemaphore+0x13/0x20
> [<ffffffff81624f13>] __do_page_fault+0x133/0x4e0
> [<ffffffff8104467b>] ? __change_page_attr+0x6b/0x2b0
> [<ffffffff8104490d>] ? __change_page_attr_set_clr+0x4d/0xb0
> [<ffffffff816252f7>] do_page_fault+0x37/0x70
> [<ffffffff8162108c>] ? restore_args+0x30/0x30
> [<ffffffff81621262>] page_fault+0x22/0x30
> [<ffffffffa0366b02>] ? ip6mr_sk_done+0x32/0xb0 [ipv6]
> [<ffffffffa0366af5>] ? ip6mr_sk_done+0x25/0xb0 [ipv6]
> [<ffffffffa034d9d1>] rawv6_close+0x21/0x40 [ipv6]
> [<ffffffff815bdecb>] inet_release+0xfb/0x220
> [<ffffffff815bddf2>] ? inet_release+0x22/0x220
> [<ffffffffa032686f>] inet6_release+0x3f/0x50 [ipv6]
> [<ffffffff8151c1d9>] sock_release+0x29/0xa0
> [<ffffffff81525520>] sk_release_kernel+0x30/0x70
> [<ffffffffa034f14b>] icmpv6_sk_exit+0x3b/0x80 [ipv6]
> [<ffffffff8152fff9>] ops_exit_list+0x39/0x60
> [<ffffffff815306fb>] cleanup_net+0xfb/0x1a0
> [<ffffffff81075e3a>] process_one_work+0x1da/0x610
> [<ffffffff81075dc9>] ? process_one_work+0x169/0x610
> [<ffffffff81076390>] worker_thread+0x120/0x3a0
> [<ffffffff81076270>] ? process_one_work+0x610/0x610
> [<ffffffff8107da2e>] kthread+0xee/0x100
> [<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
> [<ffffffff8162a99c>] ret_from_fork+0x7c/0xb0
> [<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
> BUG: unable to handle kernel paging request at ffffffffffffffa8
> IP: [<ffffffff8107d020>] kthread_data+0x10/0x20
> PGD 1c0c067 PUD 1c0e067 PMD 0
> Oops: 0000 [#2] SMP DEBUG_PAGEALLOC
> Modules linked in: ebtable_nat ebtables nfs fscache nf_conntrack_ipv4 nf_defrag_ipv4 ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables nfsd lockd nfs_acl exportfs auth_rpcgss autofs4 sunrpc 8021q garp bridge stp llc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 vfat fat vhost_net macvtap macvlan vhost tun kvm_intel kvm uinput iTCO_wdt iTCO_vendor_support cdc_ether usbnet mii microcode i2c_i801 i2c_core lpc_ich mfd_core shpchp ioatdma dca mlx4_core be2net wmi acpi_cpufreq mperf ext4 jbd2 mbcache dm_mirror dm_region_hash dm_log dm_mod
> CPU: 6 PID: 7 Comm: kworker/u33:0 Tainted: G D 3.11.0-rc1-ea45e-a #4
> Hardware name: IBM -[8737R2A]-/00Y2738, BIOS -[B2E120RUS-1.20]- 11/30/2012
> task: ffff8810393641c0 ti: ffff881039366000 task.ti: ffff881039366000
> RIP: 0010:[<ffffffff8107d020>] [<ffffffff8107d020>] kthread_data+0x10/0x20
> RSP: 0018:ffff8810393677f8 EFLAGS: 00010092
> RAX: 0000000000000000 RBX: 0000000000000006 RCX: ffffffff81ff6ea0
> RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8810393641c0
> RBP: ffff8810393677f8 R08: ffff881039364230 R09: 000000000000bdde
> R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000006
> R13: ffff8810393647d8 R14: 0000000000000001 R15: 0000000000000000
> FS: 0000000000000000(0000) GS:ffff88103fd80000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 0000000000000028 CR3: 0000000001c0b000 CR4: 00000000000407e0
> Stack:
> ffff881039367818 ffffffff81070d85 ffff881039367818 ffff88103fd93c00
> ffff8810393678a8 ffffffff8161e40b ffff881039367858 ffff881039366000
> ffff881039367fd8 ffff881039366000 ffff881039366010 ffff881039366000
> Call Trace:
> [<ffffffff81070d85>] wq_worker_sleeping+0x15/0xa0
> [<ffffffff8161e40b>] __schedule+0x6cb/0x860
> [<ffffffff8161e799>] schedule+0x29/0x70
> [<ffffffff81056105>] do_exit+0x2d5/0x4c0
> [<ffffffff81621f49>] oops_end+0xa9/0xf0
> [<ffffffff81042e0e>] no_context+0x11e/0x1f0
> [<ffffffff8104300d>] __bad_area_nosemaphore+0x12d/0x230
> [<ffffffff81043123>] bad_area_nosemaphore+0x13/0x20
> [<ffffffff81624f13>] __do_page_fault+0x133/0x4e0
> [<ffffffff8104467b>] ? __change_page_attr+0x6b/0x2b0
> [<ffffffff8104490d>] ? __change_page_attr_set_clr+0x4d/0xb0
> [<ffffffff816252f7>] do_page_fault+0x37/0x70
> [<ffffffff8162108c>] ? restore_args+0x30/0x30
> [<ffffffff81621262>] page_fault+0x22/0x30
> [<ffffffffa0366b02>] ? ip6mr_sk_done+0x32/0xb0 [ipv6]
> [<ffffffffa0366af5>] ? ip6mr_sk_done+0x25/0xb0 [ipv6]
> [<ffffffffa034d9d1>] rawv6_close+0x21/0x40 [ipv6]
> [<ffffffff815bdecb>] inet_release+0xfb/0x220
> [<ffffffff815bddf2>] ? inet_release+0x22/0x220
> [<ffffffffa032686f>] inet6_release+0x3f/0x50 [ipv6]
> [<ffffffff8151c1d9>] sock_release+0x29/0xa0
> [<ffffffff81525520>] sk_release_kernel+0x30/0x70
> [<ffffffffa034f14b>] icmpv6_sk_exit+0x3b/0x80 [ipv6]
> [<ffffffff8152fff9>] ops_exit_list+0x39/0x60
> [<ffffffff815306fb>] cleanup_net+0xfb/0x1a0
> [<ffffffff81075e3a>] process_one_work+0x1da/0x610
> [<ffffffff81075dc9>] ? process_one_work+0x169/0x610
> [<ffffffff81076390>] worker_thread+0x120/0x3a0
> [<ffffffff81076270>] ? process_one_work+0x610/0x610
> [<ffffffff8107da2e>] kthread+0xee/0x100
> [<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
> [<ffffffff8162a99c>] ret_from_fork+0x7c/0xb0
> [<ffffffff8107d940>] ? __init_kthread_worker+0x70/0x70
> Code: 70 05 00 00 48 8b 40 98 c9 48 c1 e8 02 83 e0 01 c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 66 66 66 66 90 48 8b 87 70 05 00 00<48> 8b 40 a8 c9 c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 66
> RIP [<ffffffff8107d020>] kthread_data+0x10/0x20
> RSP<ffff8810393677f8>
> CR2: ffffffffffffffa8
> ---[ end trace e8367f5addd58b60 ]---
> Fixing recursive fault but reboot is needed!
>
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
--
浮沉随浪只记今朝笑
--fan
On 07/22/2013 03:59 PM, Fan Du wrote:
> Hallo Srivatsa
>
>
> On 2013年07月22日 02:28, Srivatsa S. Bhat wrote:
>> Hi,
>>
>> I'm seeing this on every boot.
>>
>> Version: Latest mainline (commit ea45ea70b)
>
> I tested with this commit using your updated IPv6 config, this incident
> didn't show up after several times of reboot.
> Could you please elaborate your testing details if possible?
>
Well, there is nothing special in my tests - I just boot the kernel
with that config, that's all :-)
I'll attach my full .config, perhaps that will help you narrow down
the problem.
Regards,
Srivatsa S. Bhat
On Mon, Jul 22, 2013 at 06:29:58PM +0800, Fan Du wrote:
> Hallo Srivatsa
>
>
> On 2013年07月22日 02:28, Srivatsa S. Bhat wrote:
> >Hi,
> >
> >I'm seeing this on every boot.
> >
> >Version: Latest mainline (commit ea45ea70b)
>
> I tested with this commit using your updated IPv6 config, this incident
> didn't show up after several times of reboot.
> Could you please elaborate your testing details if possible?
>
> A wild guess, it dereference mrt->mroute6_sk, indicating mrt is invalid.
Yes, that seems to be the case.
Could you test the following patch if you have a bit of time?
rtnl_lock is for some functions down lower the call stack in ip6mr_free_table.
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 583e8d4..03986d3 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -259,10 +259,12 @@ static void __net_exit ip6mr_rules_exit(struct net *net)
{
struct mr6_table *mrt, *next;
+ rtnl_lock();
list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) {
list_del(&mrt->list);
ip6mr_free_table(mrt);
}
+ rtnl_unlock();
fib_rules_unregister(net->ipv6.mr6_rules_ops);
}
#else
@@ -289,7 +291,10 @@ static int __net_init ip6mr_rules_init(struct net *net)
static void __net_exit ip6mr_rules_exit(struct net *net)
{
+ rtnl_lock();
ip6mr_free_table(net->ipv6.mrt6);
+ net->ipv6.mrt6 = NULL;
+ rtnl_unlock();
}
#endif
On 07/22/2013 05:49 PM, Hannes Frederic Sowa wrote:
> On Mon, Jul 22, 2013 at 06:29:58PM +0800, Fan Du wrote:
>> Hallo Srivatsa
>>
>>
>> On 2013年07月22日 02:28, Srivatsa S. Bhat wrote:
>>> Hi,
>>>
>>> I'm seeing this on every boot.
>>>
>>> Version: Latest mainline (commit ea45ea70b)
>>
>> I tested with this commit using your updated IPv6 config, this incident
>> didn't show up after several times of reboot.
>> Could you please elaborate your testing details if possible?
>>
>> A wild guess, it dereference mrt->mroute6_sk, indicating mrt is invalid.
>
> Yes, that seems to be the case.
>
> Could you test the following patch if you have a bit of time?
>
> rtnl_lock is for some functions down lower the call stack in ip6mr_free_table.
>
This patch fixed the issue I was facing. Thanks!
Tested-by: Srivatsa S. Bhat <[email protected]>
Regards,
Srivatsa S. Bhat
> diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
> index 583e8d4..03986d3 100644
> --- a/net/ipv6/ip6mr.c
> +++ b/net/ipv6/ip6mr.c
> @@ -259,10 +259,12 @@ static void __net_exit ip6mr_rules_exit(struct net *net)
> {
> struct mr6_table *mrt, *next;
>
> + rtnl_lock();
> list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) {
> list_del(&mrt->list);
> ip6mr_free_table(mrt);
> }
> + rtnl_unlock();
> fib_rules_unregister(net->ipv6.mr6_rules_ops);
> }
> #else
> @@ -289,7 +291,10 @@ static int __net_init ip6mr_rules_init(struct net *net)
>
> static void __net_exit ip6mr_rules_exit(struct net *net)
> {
> + rtnl_lock();
> ip6mr_free_table(net->ipv6.mrt6);
> + net->ipv6.mrt6 = NULL;
> + rtnl_unlock();
> }
> #endif
>
>