From: Luo Meng luomeng12@huawei.com
commit e4b5957c6f749a501c464f92792f1c8e26b61a94 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/dm-clone-target.c | 1 + 1 file changed, 1 insertion(+)
--- 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 *
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);