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| author | Luo Meng <luomeng12@huawei.com> | 2022-11-29 10:48:49 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-07 12:07:36 +0100 |
| commit | 034cbc8d3b47a56acd89453c29632a9c117de09d (patch) | |
| tree | 975994c7846507865f07fe5912687f04af5bc1cf | |
| parent | 7ee059d06a5d3c15465959e0472993e80fbe4e81 (diff) | |
| download | linux-stable-034cbc8d3b47a56acd89453c29632a9c117de09d.tar.gz linux-stable-034cbc8d3b47a56acd89453c29632a9c117de09d.tar.bz2 linux-stable-034cbc8d3b47a56acd89453c29632a9c117de09d.zip | |
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 1b7d77080d6b..03dcb4ec4225 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -2321,6 +2321,7 @@ static void destroy(struct cache *cache) if (cache->prison) dm_bio_prison_destroy(cache->prison); + cancel_delayed_work_sync(&cache->waker); if (cache->wq) destroy_workqueue(cache->wq); |