Commit 81bc6d15 authored Apr 25, 2019 by Mikulas Patocka Committed by Mike Snitzer Apr 26, 2019

dm delay: fix a crash when invalid device is specified



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>

parent 514cf4f8

drivers/md/dm-delay.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -121,6 +121,7 @@ static void delay_dtr(struct dm_target *ti)
		{
		struct delay_c *dc = ti->private;

		if (dc->kdelayd_wq)
		destroy_workqueue(dc->kdelayd_wq);

		if (dc->read.dev)