In get_initial_state, it calls notify_initial_state_done(skb,..) if
cb->args[5]==1. If genlmsg_put() failed in notify_initial_state_done(),
the skb will be freed by nlmsg_free(skb).
Then get_initial_state will goto out and the freed skb will be used by
return value skb->len, which is a uaf bug.
What's worse, the same problem goes even further: skb can also be
freed in the notify_*_state_change -> notify_*_state calls below.
Thus 4 additional uaf bugs happened.
My patch lets the problem callee functions: notify_initial_state_done
and notify_*_state_change return an error code if errors happen.
So that the error codes could be propagated and the uaf bugs can be avoid.
v1 contains a compilation error. This v2 fixed this error and built
successfully in my local environment.
Fixes: a29728463b254 ("drbd: Backport the "events2" command")
Signed-off-by: Lv Yunlong <[email protected]>
---
drivers/block/drbd/drbd_int.h | 8 ++---
drivers/block/drbd/drbd_nl.c | 41 ++++++++++++++++----------
drivers/block/drbd/drbd_state.c | 16 +++++-----
drivers/block/drbd/drbd_state_change.h | 8 ++---
4 files changed, 41 insertions(+), 32 deletions(-)
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 5d9181382ce1..0a5766a2f161 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1642,22 +1642,22 @@ struct sib_info {
};
void drbd_bcast_event(struct drbd_device *device, const struct sib_info *sib);
-extern void notify_resource_state(struct sk_buff *,
+extern int notify_resource_state(struct sk_buff *,
unsigned int,
struct drbd_resource *,
struct resource_info *,
enum drbd_notification_type);
-extern void notify_device_state(struct sk_buff *,
+extern int notify_device_state(struct sk_buff *,
unsigned int,
struct drbd_device *,
struct device_info *,
enum drbd_notification_type);
-extern void notify_connection_state(struct sk_buff *,
+extern int notify_connection_state(struct sk_buff *,
unsigned int,
struct drbd_connection *,
struct connection_info *,
enum drbd_notification_type);
-extern void notify_peer_device_state(struct sk_buff *,
+extern int notify_peer_device_state(struct sk_buff *,
unsigned int,
struct drbd_peer_device *,
struct peer_device_info *,
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index e7d0e637e632..18c4fea028e1 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -4617,7 +4617,7 @@ static int nla_put_notification_header(struct sk_buff *msg,
return drbd_notification_header_to_skb(msg, &nh, true);
}
-void notify_resource_state(struct sk_buff *skb,
+int notify_resource_state(struct sk_buff *skb,
unsigned int seq,
struct drbd_resource *resource,
struct resource_info *resource_info,
@@ -4659,16 +4659,17 @@ void notify_resource_state(struct sk_buff *skb,
if (err && err != -ESRCH)
goto failed;
}
- return;
+ return 0;
nla_put_failure:
nlmsg_free(skb);
failed:
drbd_err(resource, "Error %d while broadcasting event. Event seq:%u\n",
err, seq);
+ return err;
}
-void notify_device_state(struct sk_buff *skb,
+int notify_device_state(struct sk_buff *skb,
unsigned int seq,
struct drbd_device *device,
struct device_info *device_info,
@@ -4708,16 +4709,17 @@ void notify_device_state(struct sk_buff *skb,
if (err && err != -ESRCH)
goto failed;
}
- return;
+ return 0;
nla_put_failure:
nlmsg_free(skb);
failed:
drbd_err(device, "Error %d while broadcasting event. Event seq:%u\n",
err, seq);
+ return err;
}
-void notify_connection_state(struct sk_buff *skb,
+int notify_connection_state(struct sk_buff *skb,
unsigned int seq,
struct drbd_connection *connection,
struct connection_info *connection_info,
@@ -4757,16 +4759,17 @@ void notify_connection_state(struct sk_buff *skb,
if (err && err != -ESRCH)
goto failed;
}
- return;
+ return 0;
nla_put_failure:
nlmsg_free(skb);
failed:
drbd_err(connection, "Error %d while broadcasting event. Event seq:%u\n",
err, seq);
+ return err;
}
-void notify_peer_device_state(struct sk_buff *skb,
+int notify_peer_device_state(struct sk_buff *skb,
unsigned int seq,
struct drbd_peer_device *peer_device,
struct peer_device_info *peer_device_info,
@@ -4807,13 +4810,14 @@ void notify_peer_device_state(struct sk_buff *skb,
if (err && err != -ESRCH)
goto failed;
}
- return;
+ return 0;
nla_put_failure:
nlmsg_free(skb);
failed:
drbd_err(peer_device, "Error %d while broadcasting event. Event seq:%u\n",
err, seq);
+ return err;
}
void notify_helper(enum drbd_notification_type type,
@@ -4864,7 +4868,7 @@ void notify_helper(enum drbd_notification_type type,
err, seq);
}
-static void notify_initial_state_done(struct sk_buff *skb, unsigned int seq)
+static int notify_initial_state_done(struct sk_buff *skb, unsigned int seq)
{
struct drbd_genlmsghdr *dh;
int err;
@@ -4878,11 +4882,12 @@ static void notify_initial_state_done(struct sk_buff *skb, unsigned int seq)
if (nla_put_notification_header(skb, NOTIFY_EXISTS))
goto nla_put_failure;
genlmsg_end(skb, dh);
- return;
+ return 0;
nla_put_failure:
nlmsg_free(skb);
pr_err("Error %d sending event. Event seq:%u\n", err, seq);
+ return err;
}
static void free_state_changes(struct list_head *list)
@@ -4909,6 +4914,7 @@ static int get_initial_state(struct sk_buff *skb, struct netlink_callback *cb)
unsigned int seq = cb->args[2];
unsigned int n;
enum drbd_notification_type flags = 0;
+ int err = 0;
/* There is no need for taking notification_mutex here: it doesn't
matter if the initial state events mix with later state chage
@@ -4917,32 +4923,32 @@ static int get_initial_state(struct sk_buff *skb, struct netlink_callback *cb)
cb->args[5]--;
if (cb->args[5] == 1) {
- notify_initial_state_done(skb, seq);
+ err = notify_initial_state_done(skb, seq);
goto out;
}
n = cb->args[4]++;
if (cb->args[4] < cb->args[3])
flags |= NOTIFY_CONTINUES;
if (n < 1) {
- notify_resource_state_change(skb, seq, state_change->resource,
+ err = notify_resource_state_change(skb, seq, state_change->resource,
NOTIFY_EXISTS | flags);
goto next;
}
n--;
if (n < state_change->n_connections) {
- notify_connection_state_change(skb, seq, &state_change->connections[n],
+ err = notify_connection_state_change(skb, seq, &state_change->connections[n],
NOTIFY_EXISTS | flags);
goto next;
}
n -= state_change->n_connections;
if (n < state_change->n_devices) {
- notify_device_state_change(skb, seq, &state_change->devices[n],
+ err = notify_device_state_change(skb, seq, &state_change->devices[n],
NOTIFY_EXISTS | flags);
goto next;
}
n -= state_change->n_devices;
if (n < state_change->n_devices * state_change->n_connections) {
- notify_peer_device_state_change(skb, seq, &state_change->peer_devices[n],
+ err = notify_peer_device_state_change(skb, seq, &state_change->peer_devices[n],
NOTIFY_EXISTS | flags);
goto next;
}
@@ -4957,7 +4963,10 @@ static int get_initial_state(struct sk_buff *skb, struct netlink_callback *cb)
cb->args[4] = 0;
}
out:
- return skb->len;
+ if (err)
+ return err;
+ else
+ return skb->len;
}
int drbd_adm_get_initial_state(struct sk_buff *skb, struct netlink_callback *cb)
diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index b8a27818ab3f..a650f91f2246 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -1537,7 +1537,7 @@ int drbd_bitmap_io_from_worker(struct drbd_device *device,
return rv;
}
-void notify_resource_state_change(struct sk_buff *skb,
+int notify_resource_state_change(struct sk_buff *skb,
unsigned int seq,
struct drbd_resource_state_change *resource_state_change,
enum drbd_notification_type type)
@@ -1550,10 +1550,10 @@ void notify_resource_state_change(struct sk_buff *skb,
.res_susp_fen = resource_state_change->susp_fen[NEW],
};
- notify_resource_state(skb, seq, resource, &resource_info, type);
+ return notify_resource_state(skb, seq, resource, &resource_info, type);
}
-void notify_connection_state_change(struct sk_buff *skb,
+int notify_connection_state_change(struct sk_buff *skb,
unsigned int seq,
struct drbd_connection_state_change *connection_state_change,
enum drbd_notification_type type)
@@ -1564,10 +1564,10 @@ void notify_connection_state_change(struct sk_buff *skb,
.conn_role = connection_state_change->peer_role[NEW],
};
- notify_connection_state(skb, seq, connection, &connection_info, type);
+ return notify_connection_state(skb, seq, connection, &connection_info, type);
}
-void notify_device_state_change(struct sk_buff *skb,
+int notify_device_state_change(struct sk_buff *skb,
unsigned int seq,
struct drbd_device_state_change *device_state_change,
enum drbd_notification_type type)
@@ -1577,10 +1577,10 @@ void notify_device_state_change(struct sk_buff *skb,
.dev_disk_state = device_state_change->disk_state[NEW],
};
- notify_device_state(skb, seq, device, &device_info, type);
+ return notify_device_state(skb, seq, device, &device_info, type);
}
-void notify_peer_device_state_change(struct sk_buff *skb,
+int notify_peer_device_state_change(struct sk_buff *skb,
unsigned int seq,
struct drbd_peer_device_state_change *p,
enum drbd_notification_type type)
@@ -1594,7 +1594,7 @@ void notify_peer_device_state_change(struct sk_buff *skb,
.peer_resync_susp_dependency = p->resync_susp_dependency[NEW],
};
- notify_peer_device_state(skb, seq, peer_device, &peer_device_info, type);
+ return notify_peer_device_state(skb, seq, peer_device, &peer_device_info, type);
}
static void broadcast_state_change(struct drbd_state_change *state_change)
diff --git a/drivers/block/drbd/drbd_state_change.h b/drivers/block/drbd/drbd_state_change.h
index ba80f612d6ab..d5b0479bc9a6 100644
--- a/drivers/block/drbd/drbd_state_change.h
+++ b/drivers/block/drbd/drbd_state_change.h
@@ -44,19 +44,19 @@ extern struct drbd_state_change *remember_old_state(struct drbd_resource *, gfp_
extern void copy_old_to_new_state_change(struct drbd_state_change *);
extern void forget_state_change(struct drbd_state_change *);
-extern void notify_resource_state_change(struct sk_buff *,
+extern int notify_resource_state_change(struct sk_buff *,
unsigned int,
struct drbd_resource_state_change *,
enum drbd_notification_type type);
-extern void notify_connection_state_change(struct sk_buff *,
+extern int notify_connection_state_change(struct sk_buff *,
unsigned int,
struct drbd_connection_state_change *,
enum drbd_notification_type type);
-extern void notify_device_state_change(struct sk_buff *,
+extern int notify_device_state_change(struct sk_buff *,
unsigned int,
struct drbd_device_state_change *,
enum drbd_notification_type type);
-extern void notify_peer_device_state_change(struct sk_buff *,
+extern int notify_peer_device_state_change(struct sk_buff *,
unsigned int,
struct drbd_peer_device_state_change *,
enum drbd_notification_type type);
--
2.25.1
Hi Lv,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on block/for-next]
[also build test WARNING on linux/master linus/master v5.13-rc3 next-20210524]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Lv-Yunlong/drbd-Fix-five-use-after-free-bugs-in-get_initial_state/20210524-233429
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: um-allmodconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://github.com/0day-ci/linux/commit/869bb8c1a492179ef95ae5785302d1df14bd24d3
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Lv-Yunlong/drbd-Fix-five-use-after-free-bugs-in-get_initial_state/20210524-233429
git checkout 869bb8c1a492179ef95ae5785302d1df14bd24d3
# save the attached .config to linux build tree
make W=1 ARCH=um
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>
All warnings (new ones prefixed by >>):
drivers/block/drbd/drbd_state.c: In function 'broadcast_state_change':
drivers/block/drbd/drbd_state.c:1616:17: warning: cast between incompatible function types from 'int (*)(struct sk_buff *, unsigned int, struct drbd_resource_state_change *, enum drbd_notification_type)' to 'void (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)' [-Wcast-function-type]
1616 | last_func = (typeof(last_func))func; \
| ^
drivers/block/drbd/drbd_state.c:1629:3: note: in expansion of macro 'REMEMBER_STATE_CHANGE'
1629 | REMEMBER_STATE_CHANGE(notify_resource_state_change,
| ^~~~~~~~~~~~~~~~~~~~~
drivers/block/drbd/drbd_state.c:1616:17: warning: cast between incompatible function types from 'int (*)(struct sk_buff *, unsigned int, struct drbd_connection_state_change *, enum drbd_notification_type)' to 'void (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)' [-Wcast-function-type]
1616 | last_func = (typeof(last_func))func; \
| ^
drivers/block/drbd/drbd_state.c:1638:4: note: in expansion of macro 'REMEMBER_STATE_CHANGE'
1638 | REMEMBER_STATE_CHANGE(notify_connection_state_change,
| ^~~~~~~~~~~~~~~~~~~~~
>> drivers/block/drbd/drbd_state.c:1616:17: warning: cast between incompatible function types from 'int (*)(struct sk_buff *, unsigned int, struct drbd_device_state_change *, enum drbd_notification_type)' to 'void (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)' [-Wcast-function-type]
1616 | last_func = (typeof(last_func))func; \
| ^
drivers/block/drbd/drbd_state.c:1647:4: note: in expansion of macro 'REMEMBER_STATE_CHANGE'
1647 | REMEMBER_STATE_CHANGE(notify_device_state_change,
| ^~~~~~~~~~~~~~~~~~~~~
drivers/block/drbd/drbd_state.c:1616:17: warning: cast between incompatible function types from 'int (*)(struct sk_buff *, unsigned int, struct drbd_peer_device_state_change *, enum drbd_notification_type)' to 'void (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)' [-Wcast-function-type]
1616 | last_func = (typeof(last_func))func; \
| ^
drivers/block/drbd/drbd_state.c:1661:4: note: in expansion of macro 'REMEMBER_STATE_CHANGE'
1661 | REMEMBER_STATE_CHANGE(notify_peer_device_state_change,
| ^~~~~~~~~~~~~~~~~~~~~
vim +1616 drivers/block/drbd/drbd_state.c
a29728463b254c Andreas Gruenbacher 2014-07-31 1599
a29728463b254c Andreas Gruenbacher 2014-07-31 1600 static void broadcast_state_change(struct drbd_state_change *state_change)
a29728463b254c Andreas Gruenbacher 2014-07-31 1601 {
a29728463b254c Andreas Gruenbacher 2014-07-31 1602 struct drbd_resource_state_change *resource_state_change = &state_change->resource[0];
a29728463b254c Andreas Gruenbacher 2014-07-31 1603 bool resource_state_has_changed;
a29728463b254c Andreas Gruenbacher 2014-07-31 1604 unsigned int n_device, n_connection, n_peer_device, n_peer_devices;
a29728463b254c Andreas Gruenbacher 2014-07-31 1605 void (*last_func)(struct sk_buff *, unsigned int, void *,
a29728463b254c Andreas Gruenbacher 2014-07-31 1606 enum drbd_notification_type) = NULL;
805cdb8bc6da87 Kees Cook 2020-06-03 1607 void *last_arg = NULL;
a29728463b254c Andreas Gruenbacher 2014-07-31 1608
a29728463b254c Andreas Gruenbacher 2014-07-31 1609 #define HAS_CHANGED(state) ((state)[OLD] != (state)[NEW])
a29728463b254c Andreas Gruenbacher 2014-07-31 1610 #define FINAL_STATE_CHANGE(type) \
a29728463b254c Andreas Gruenbacher 2014-07-31 1611 ({ if (last_func) \
a29728463b254c Andreas Gruenbacher 2014-07-31 1612 last_func(NULL, 0, last_arg, type); \
a29728463b254c Andreas Gruenbacher 2014-07-31 1613 })
a29728463b254c Andreas Gruenbacher 2014-07-31 1614 #define REMEMBER_STATE_CHANGE(func, arg, type) \
a29728463b254c Andreas Gruenbacher 2014-07-31 1615 ({ FINAL_STATE_CHANGE(type | NOTIFY_CONTINUES); \
a29728463b254c Andreas Gruenbacher 2014-07-31 @1616 last_func = (typeof(last_func))func; \
a29728463b254c Andreas Gruenbacher 2014-07-31 1617 last_arg = arg; \
a29728463b254c Andreas Gruenbacher 2014-07-31 1618 })
a29728463b254c Andreas Gruenbacher 2014-07-31 1619
a29728463b254c Andreas Gruenbacher 2014-07-31 1620 mutex_lock(¬ification_mutex);
a29728463b254c Andreas Gruenbacher 2014-07-31 1621
a29728463b254c Andreas Gruenbacher 2014-07-31 1622 resource_state_has_changed =
a29728463b254c Andreas Gruenbacher 2014-07-31 1623 HAS_CHANGED(resource_state_change->role) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1624 HAS_CHANGED(resource_state_change->susp) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1625 HAS_CHANGED(resource_state_change->susp_nod) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1626 HAS_CHANGED(resource_state_change->susp_fen);
a29728463b254c Andreas Gruenbacher 2014-07-31 1627
a29728463b254c Andreas Gruenbacher 2014-07-31 1628 if (resource_state_has_changed)
a29728463b254c Andreas Gruenbacher 2014-07-31 1629 REMEMBER_STATE_CHANGE(notify_resource_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1630 resource_state_change, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1631
a29728463b254c Andreas Gruenbacher 2014-07-31 1632 for (n_connection = 0; n_connection < state_change->n_connections; n_connection++) {
a29728463b254c Andreas Gruenbacher 2014-07-31 1633 struct drbd_connection_state_change *connection_state_change =
a29728463b254c Andreas Gruenbacher 2014-07-31 1634 &state_change->connections[n_connection];
a29728463b254c Andreas Gruenbacher 2014-07-31 1635
a29728463b254c Andreas Gruenbacher 2014-07-31 1636 if (HAS_CHANGED(connection_state_change->peer_role) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1637 HAS_CHANGED(connection_state_change->cstate))
a29728463b254c Andreas Gruenbacher 2014-07-31 1638 REMEMBER_STATE_CHANGE(notify_connection_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1639 connection_state_change, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1640 }
a29728463b254c Andreas Gruenbacher 2014-07-31 1641
a29728463b254c Andreas Gruenbacher 2014-07-31 1642 for (n_device = 0; n_device < state_change->n_devices; n_device++) {
a29728463b254c Andreas Gruenbacher 2014-07-31 1643 struct drbd_device_state_change *device_state_change =
a29728463b254c Andreas Gruenbacher 2014-07-31 1644 &state_change->devices[n_device];
a29728463b254c Andreas Gruenbacher 2014-07-31 1645
a29728463b254c Andreas Gruenbacher 2014-07-31 1646 if (HAS_CHANGED(device_state_change->disk_state))
a29728463b254c Andreas Gruenbacher 2014-07-31 1647 REMEMBER_STATE_CHANGE(notify_device_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1648 device_state_change, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1649 }
a29728463b254c Andreas Gruenbacher 2014-07-31 1650
a29728463b254c Andreas Gruenbacher 2014-07-31 1651 n_peer_devices = state_change->n_devices * state_change->n_connections;
a29728463b254c Andreas Gruenbacher 2014-07-31 1652 for (n_peer_device = 0; n_peer_device < n_peer_devices; n_peer_device++) {
a29728463b254c Andreas Gruenbacher 2014-07-31 1653 struct drbd_peer_device_state_change *p =
a29728463b254c Andreas Gruenbacher 2014-07-31 1654 &state_change->peer_devices[n_peer_device];
a29728463b254c Andreas Gruenbacher 2014-07-31 1655
a29728463b254c Andreas Gruenbacher 2014-07-31 1656 if (HAS_CHANGED(p->disk_state) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1657 HAS_CHANGED(p->repl_state) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1658 HAS_CHANGED(p->resync_susp_user) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1659 HAS_CHANGED(p->resync_susp_peer) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1660 HAS_CHANGED(p->resync_susp_dependency))
a29728463b254c Andreas Gruenbacher 2014-07-31 1661 REMEMBER_STATE_CHANGE(notify_peer_device_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1662 p, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1663 }
a29728463b254c Andreas Gruenbacher 2014-07-31 1664
a29728463b254c Andreas Gruenbacher 2014-07-31 1665 FINAL_STATE_CHANGE(NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1666 mutex_unlock(¬ification_mutex);
a29728463b254c Andreas Gruenbacher 2014-07-31 1667
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]
Hi Lv,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on block/for-next]
[also build test WARNING on linux/master linus/master v5.13-rc3 next-20210524]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Lv-Yunlong/drbd-Fix-five-use-after-free-bugs-in-get_initial_state/20210524-233429
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: arc-randconfig-r025-20210524 (attached as .config)
compiler: arc-elf-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/869bb8c1a492179ef95ae5785302d1df14bd24d3
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Lv-Yunlong/drbd-Fix-five-use-after-free-bugs-in-get_initial_state/20210524-233429
git checkout 869bb8c1a492179ef95ae5785302d1df14bd24d3
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>
All warnings (new ones prefixed by >>):
drivers/block/drbd/drbd_state.c: In function 'broadcast_state_change':
>> drivers/block/drbd/drbd_state.c:1616:17: warning: cast between incompatible function types from 'int (*)(struct sk_buff *, unsigned int, struct drbd_resource_state_change *, enum drbd_notification_type)' to 'void (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)' [-Wcast-function-type]
1616 | last_func = (typeof(last_func))func; \
| ^
drivers/block/drbd/drbd_state.c:1629:3: note: in expansion of macro 'REMEMBER_STATE_CHANGE'
1629 | REMEMBER_STATE_CHANGE(notify_resource_state_change,
| ^~~~~~~~~~~~~~~~~~~~~
>> drivers/block/drbd/drbd_state.c:1616:17: warning: cast between incompatible function types from 'int (*)(struct sk_buff *, unsigned int, struct drbd_connection_state_change *, enum drbd_notification_type)' to 'void (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)' [-Wcast-function-type]
1616 | last_func = (typeof(last_func))func; \
| ^
drivers/block/drbd/drbd_state.c:1638:4: note: in expansion of macro 'REMEMBER_STATE_CHANGE'
1638 | REMEMBER_STATE_CHANGE(notify_connection_state_change,
| ^~~~~~~~~~~~~~~~~~~~~
>> drivers/block/drbd/drbd_state.c:1616:17: warning: cast between incompatible function types from 'int (*)(struct sk_buff *, unsigned int, struct drbd_device_state_change *, enum drbd_notification_type)' to 'void (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)' [-Wcast-function-type]
1616 | last_func = (typeof(last_func))func; \
| ^
drivers/block/drbd/drbd_state.c:1647:4: note: in expansion of macro 'REMEMBER_STATE_CHANGE'
1647 | REMEMBER_STATE_CHANGE(notify_device_state_change,
| ^~~~~~~~~~~~~~~~~~~~~
>> drivers/block/drbd/drbd_state.c:1616:17: warning: cast between incompatible function types from 'int (*)(struct sk_buff *, unsigned int, struct drbd_peer_device_state_change *, enum drbd_notification_type)' to 'void (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)' [-Wcast-function-type]
1616 | last_func = (typeof(last_func))func; \
| ^
drivers/block/drbd/drbd_state.c:1661:4: note: in expansion of macro 'REMEMBER_STATE_CHANGE'
1661 | REMEMBER_STATE_CHANGE(notify_peer_device_state_change,
| ^~~~~~~~~~~~~~~~~~~~~
vim +1616 drivers/block/drbd/drbd_state.c
a29728463b254c Andreas Gruenbacher 2014-07-31 1599
a29728463b254c Andreas Gruenbacher 2014-07-31 1600 static void broadcast_state_change(struct drbd_state_change *state_change)
a29728463b254c Andreas Gruenbacher 2014-07-31 1601 {
a29728463b254c Andreas Gruenbacher 2014-07-31 1602 struct drbd_resource_state_change *resource_state_change = &state_change->resource[0];
a29728463b254c Andreas Gruenbacher 2014-07-31 1603 bool resource_state_has_changed;
a29728463b254c Andreas Gruenbacher 2014-07-31 1604 unsigned int n_device, n_connection, n_peer_device, n_peer_devices;
a29728463b254c Andreas Gruenbacher 2014-07-31 1605 void (*last_func)(struct sk_buff *, unsigned int, void *,
a29728463b254c Andreas Gruenbacher 2014-07-31 1606 enum drbd_notification_type) = NULL;
805cdb8bc6da87 Kees Cook 2020-06-03 1607 void *last_arg = NULL;
a29728463b254c Andreas Gruenbacher 2014-07-31 1608
a29728463b254c Andreas Gruenbacher 2014-07-31 1609 #define HAS_CHANGED(state) ((state)[OLD] != (state)[NEW])
a29728463b254c Andreas Gruenbacher 2014-07-31 1610 #define FINAL_STATE_CHANGE(type) \
a29728463b254c Andreas Gruenbacher 2014-07-31 1611 ({ if (last_func) \
a29728463b254c Andreas Gruenbacher 2014-07-31 1612 last_func(NULL, 0, last_arg, type); \
a29728463b254c Andreas Gruenbacher 2014-07-31 1613 })
a29728463b254c Andreas Gruenbacher 2014-07-31 1614 #define REMEMBER_STATE_CHANGE(func, arg, type) \
a29728463b254c Andreas Gruenbacher 2014-07-31 1615 ({ FINAL_STATE_CHANGE(type | NOTIFY_CONTINUES); \
a29728463b254c Andreas Gruenbacher 2014-07-31 @1616 last_func = (typeof(last_func))func; \
a29728463b254c Andreas Gruenbacher 2014-07-31 1617 last_arg = arg; \
a29728463b254c Andreas Gruenbacher 2014-07-31 1618 })
a29728463b254c Andreas Gruenbacher 2014-07-31 1619
a29728463b254c Andreas Gruenbacher 2014-07-31 1620 mutex_lock(¬ification_mutex);
a29728463b254c Andreas Gruenbacher 2014-07-31 1621
a29728463b254c Andreas Gruenbacher 2014-07-31 1622 resource_state_has_changed =
a29728463b254c Andreas Gruenbacher 2014-07-31 1623 HAS_CHANGED(resource_state_change->role) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1624 HAS_CHANGED(resource_state_change->susp) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1625 HAS_CHANGED(resource_state_change->susp_nod) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1626 HAS_CHANGED(resource_state_change->susp_fen);
a29728463b254c Andreas Gruenbacher 2014-07-31 1627
a29728463b254c Andreas Gruenbacher 2014-07-31 1628 if (resource_state_has_changed)
a29728463b254c Andreas Gruenbacher 2014-07-31 1629 REMEMBER_STATE_CHANGE(notify_resource_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1630 resource_state_change, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1631
a29728463b254c Andreas Gruenbacher 2014-07-31 1632 for (n_connection = 0; n_connection < state_change->n_connections; n_connection++) {
a29728463b254c Andreas Gruenbacher 2014-07-31 1633 struct drbd_connection_state_change *connection_state_change =
a29728463b254c Andreas Gruenbacher 2014-07-31 1634 &state_change->connections[n_connection];
a29728463b254c Andreas Gruenbacher 2014-07-31 1635
a29728463b254c Andreas Gruenbacher 2014-07-31 1636 if (HAS_CHANGED(connection_state_change->peer_role) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1637 HAS_CHANGED(connection_state_change->cstate))
a29728463b254c Andreas Gruenbacher 2014-07-31 1638 REMEMBER_STATE_CHANGE(notify_connection_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1639 connection_state_change, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1640 }
a29728463b254c Andreas Gruenbacher 2014-07-31 1641
a29728463b254c Andreas Gruenbacher 2014-07-31 1642 for (n_device = 0; n_device < state_change->n_devices; n_device++) {
a29728463b254c Andreas Gruenbacher 2014-07-31 1643 struct drbd_device_state_change *device_state_change =
a29728463b254c Andreas Gruenbacher 2014-07-31 1644 &state_change->devices[n_device];
a29728463b254c Andreas Gruenbacher 2014-07-31 1645
a29728463b254c Andreas Gruenbacher 2014-07-31 1646 if (HAS_CHANGED(device_state_change->disk_state))
a29728463b254c Andreas Gruenbacher 2014-07-31 1647 REMEMBER_STATE_CHANGE(notify_device_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1648 device_state_change, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1649 }
a29728463b254c Andreas Gruenbacher 2014-07-31 1650
a29728463b254c Andreas Gruenbacher 2014-07-31 1651 n_peer_devices = state_change->n_devices * state_change->n_connections;
a29728463b254c Andreas Gruenbacher 2014-07-31 1652 for (n_peer_device = 0; n_peer_device < n_peer_devices; n_peer_device++) {
a29728463b254c Andreas Gruenbacher 2014-07-31 1653 struct drbd_peer_device_state_change *p =
a29728463b254c Andreas Gruenbacher 2014-07-31 1654 &state_change->peer_devices[n_peer_device];
a29728463b254c Andreas Gruenbacher 2014-07-31 1655
a29728463b254c Andreas Gruenbacher 2014-07-31 1656 if (HAS_CHANGED(p->disk_state) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1657 HAS_CHANGED(p->repl_state) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1658 HAS_CHANGED(p->resync_susp_user) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1659 HAS_CHANGED(p->resync_susp_peer) ||
a29728463b254c Andreas Gruenbacher 2014-07-31 1660 HAS_CHANGED(p->resync_susp_dependency))
a29728463b254c Andreas Gruenbacher 2014-07-31 1661 REMEMBER_STATE_CHANGE(notify_peer_device_state_change,
a29728463b254c Andreas Gruenbacher 2014-07-31 1662 p, NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1663 }
a29728463b254c Andreas Gruenbacher 2014-07-31 1664
a29728463b254c Andreas Gruenbacher 2014-07-31 1665 FINAL_STATE_CHANGE(NOTIFY_CHANGE);
a29728463b254c Andreas Gruenbacher 2014-07-31 1666 mutex_unlock(¬ification_mutex);
a29728463b254c Andreas Gruenbacher 2014-07-31 1667
---
0-DAY CI Kernel Test Service, Intel Corporation
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