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| author | Luo Meng <luomeng12@huawei.com> | 2022-11-29 05:48:49 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2022-11-30 21:29:34 +0300 |
| commit | 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa (patch) | |
| tree | c176d285fc80ba28da460c3912fe4fc1fcf952a3 /drivers | |
| parent | e4b5957c6f749a501c464f92792f1c8e26b61a94 (diff) | |
| download | linux-6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa.tar.xz | |
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: c6b4fcbad044e ("dm: add cache target")
Signed-off-by: Luo Meng <luomeng12@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-cache-target.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index 54a8d5c9a44e..624a6335c832 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -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); |