Commit 6a459d8e authored by Luo Meng's avatar Luo Meng Committed by Mike Snitzer
Browse files

dm cache: Fix UAF in destroy() 



Dm_cache also has the same UAF problem when dm_resume()
and dm_destroy() are concurrent.

Therefore, cancelling timer again in destroy().

Cc: stable@vger.kernel.org
Fixes: c6b4fcba ("dm: add cache target")
Signed-off-by: default avatarLuo Meng <luomeng12@huawei.com>
Signed-off-by: default avatarMike Snitzer <snitzer@kernel.org>
parent e4b5957c

drivers/md/dm-cache-target.c

+1 −0
Original line number Diff line number Diff line
@@ -1887,6 +1887,7 @@ static void destroy(struct cache *cache) 
	if (cache->prison)

		dm_bio_prison_destroy_v2(cache->prison);



	cancel_delayed_work_sync(&cache->waker);

	if (cache->wq)

		destroy_workqueue(cache->wq);