tree bcdcd5863599b6ae04263774cc7689ceb81fed8f
parent d4c0e42f14fbe410ed24f166f691d74e7ad4b073
author Wu Bo <wubo40@huawei.com> 1588227169 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1590593854 +0200

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>