diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2019-04-25 19:07:54 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-25 19:25:33 +0300 |
| commit | 9da66c87fdb6b0dd46840e2bbf49fa627a5d2953 (patch) | |
| tree | 0376b40524b5941b55860e9ac8e6b9a07f288b4e /drivers/md | |
| parent | fc6d84abd81ead643d5e9361879502a3ace55da4 (diff) | |
| download | linux-9da66c87fdb6b0dd46840e2bbf49fa627a5d2953.tar.xz | |
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')
| -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 2209a9700acd..cb733a5afdc8 100644 --- a/drivers/md/dm-delay.c +++ b/drivers/md/dm-delay.c @@ -222,7 +222,8 @@ 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); dm_put_device(ti, dc->dev_read); |