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| author | Luo Meng <luomeng12@huawei.com> | 2022-11-29 10:48:48 +0800 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2022-11-30 13:29:34 -0500 |
| commit | e4b5957c6f749a501c464f92792f1c8e26b61a94 (patch) | |
| tree | 48b75f315964f6cbf01328cf991dcd4579a35bbf /drivers/md/dm-clone-target.c | |
| parent | 88430ebcbc0ec637b710b947738839848c20feff (diff) | |
| download | linux-e4b5957c6f749a501c464f92792f1c8e26b61a94.tar.bz2 | |
dm clone: Fix UAF in clone_dtr()
Dm_clone also has the same UAF problem when dm_resume()
and dm_destroy() are concurrent.
Therefore, cancelling timer again in clone_dtr().
Cc: stable@vger.kernel.org
Fixes: 7431b7835f554 ("dm: add clone target")
Signed-off-by: Luo Meng <luomeng12@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers/md/dm-clone-target.c')
| -rw-r--r-- | drivers/md/dm-clone-target.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-clone-target.c b/drivers/md/dm-clone-target.c index 2f1cc66d2641..29e0b85eeaf0 100644 --- a/drivers/md/dm-clone-target.c +++ b/drivers/md/dm-clone-target.c @@ -1958,6 +1958,7 @@ static void clone_dtr(struct dm_target *ti) mempool_exit(&clone->hydration_pool); dm_kcopyd_client_destroy(clone->kcopyd_client); + cancel_delayed_work_sync(&clone->waker); destroy_workqueue(clone->wq); hash_table_exit(clone); dm_clone_metadata_close(clone->cmd); |