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| author | Wu Bo <wubo40@huawei.com> | 2020-04-30 14:12:49 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-27 16:40:24 +0200 |
| commit | f12bf0d048c281e9a2c2e69f1e41fbff4337dcea (patch) | |
| tree | 1216a1f749867f7ded8a4717b6c06947201e0b90 /fs/ceph | |
| parent | 2614ff6557d5d3170cb58644754b839302d67e69 (diff) | |
| download | linux-stable-f12bf0d048c281e9a2c2e69f1e41fbff4337dcea.tar.gz linux-stable-f12bf0d048c281e9a2c2e69f1e41fbff4337dcea.tar.bz2 linux-stable-f12bf0d048c281e9a2c2e69f1e41fbff4337dcea.zip | |
ceph: fix double unlock in handle_cap_export()
[ 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>
Diffstat (limited to 'fs/ceph')
| -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 efdf81ea3b5f..3d0497421e62 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -3293,6 +3293,7 @@ retry: WARN_ON(1); tsession = NULL; target = -1; + mutex_lock(&session->s_mutex); } goto retry; |