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author | Wu Bo <wubo40@huawei.com> | 2020-04-30 09:12:49 +0300 |
---|---|---|
committer | Ilya Dryomov <idryomov@gmail.com> | 2020-05-04 20:14:23 +0300 |
commit | 4d8e28ff3106b093d98bfd2eceb9b430c70a8758 (patch) | |
tree | e892c8e0b5ec7a78997cf977451f56f22527dbce /fs | |
parent | 7d8976afad18d4548ee472e526b126ab74012807 (diff) | |
download | linux-4d8e28ff3106b093d98bfd2eceb9b430c70a8758.tar.xz |
ceph: fix double unlock in handle_cap_export()
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>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/ceph/caps.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 1a8e20ef35bf..5f3aa4d607de 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -3746,6 +3746,7 @@ retry: WARN_ON(1); tsession = NULL; target = -1; + mutex_lock(&session->s_mutex); } goto retry; |