diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2019-04-25 12:07:54 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-25 18:22:19 +0200 |
| commit | 862a78341ade4fa52da2803e48e8c271b7fbf6e8 (patch) | |
| tree | db92088cb929d53951f0be44970a09005472bbfa | |
| parent | fab2e96c6be0078059ce77f2ee0fb2b8d7c22124 (diff) | |
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>
| -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); |