From: Luo Meng luomeng12@huawei.com
commit 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa upstream.
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: c6b4fcbad044e ("dm: add cache target") Signed-off-by: Luo Meng luomeng12@huawei.com Signed-off-by: Mike Snitzer snitzer@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/dm-cache-target.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -1992,6 +1992,7 @@ 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);