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| author | Mikulas Patocka | 2019-04-25 18:07:54 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2019-05-25 18:23:39 +0200 |
| commit | 3b92ff729cb35d1421bfeacbd3a9ebcab6b3e71d (patch) | |
| tree | 25dd794eb639374947f89726026876983672b4b0 /drivers/md/dm-delay.c | |
| parent | dm zoned: Fix zone report handling (diff) | |
| download | kernel-qcow2-linux-3b92ff729cb35d1421bfeacbd3a9ebcab6b3e71d.tar.gz kernel-qcow2-linux-3b92ff729cb35d1421bfeacbd3a9ebcab6b3e71d.tar.xz kernel-qcow2-linux-3b92ff729cb35d1421bfeacbd3a9ebcab6b3e71d.zip | |
dm delay: fix a crash when invalid device is specified
commit 81bc6d150ace6250503b825d9d0c10f7bbd24095 upstream.
When the target line contains an invalid device, delay_ctr() will call
delay_dtr() with NULL workqueue. Attempting to destroy the NULL
workqueue causes a crash.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md/dm-delay.c')
| -rw-r--r-- | drivers/md/dm-delay.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c index fddffe251bf6..f496213f8b67 100644 --- a/drivers/md/dm-delay.c +++ b/drivers/md/dm-delay.c @@ -121,7 +121,8 @@ static void delay_dtr(struct dm_target *ti) { struct delay_c *dc = ti->private; - destroy_workqueue(dc->kdelayd_wq); + if (dc->kdelayd_wq) + destroy_workqueue(dc->kdelayd_wq); if (dc->read.dev) dm_put_device(ti, dc->read.dev); |