diff options
| author | Luo Meng <luomeng12@huawei.com> | 2022-11-29 05:48:49 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-18 13:30:42 +0300 |
| commit | 4d20032dd90664de09f2902a7ea49ae2f7771746 (patch) | |
| tree | e2611881469122cecd7adf09e83df08cbaa3267a | |
| parent | e8b8e0d2bbf7d1172c4f435621418e29ee408d46 (diff) | |
| download | linux-4d20032dd90664de09f2902a7ea49ae2f7771746.tar.xz | |
dm cache: Fix UAF in destroy()
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>
| -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 2ddd575e97f7..9d87057e1b07 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -1987,6 +1987,7 @@ 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); |