From: Wu Bo wubo40@huawei.com
[ Upstream commit 4d8e28ff3106b093d98bfd2eceb9b430c70a8758 ]
If the ceph_mdsc_open_export_target_session() return fails, it will do a "goto retry", but the session mutex has already been unlocked. Re-lock the mutex in that case to ensure that we don't unlock it twice.
Signed-off-by: Wu Bo wubo40@huawei.com Reviewed-by: "Yan, Zheng" zyan@redhat.com Signed-off-by: Ilya Dryomov idryomov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ceph/caps.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index efdf81ea3b5f8..3d0497421e62b 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -3293,6 +3293,7 @@ static void handle_cap_export(struct inode *inode, struct ceph_mds_caps *ex, WARN_ON(1); tsession = NULL; target = -1; + mutex_lock(&session->s_mutex); } goto retry;