From 6575d9820f777c9ef357c25dc13fec54ded1d49c Mon Sep 17 00:00:00 2001 From: Luo Meng Date: Tue, 29 Nov 2022 10:48:49 +0800 Subject: [PATCH] dm cache: Fix UAF in destroy() commit c02c7bd825d9bccd5a6650a36662e7e99f115b57 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: 7dc177ed83882 ("dm: add cache target") Signed-off-by: Luo Meng Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-cache-target.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index f595e9867cbec..5abce95ab22a7 100644 --- 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); -- 2.39.5