From: Jeff Layton <jlayton@kernel.org>
Date: Fri, 20 Mar 2020 21:07:36 +0000 (-0400)
Subject: ceph: throw a warning if we destroy session with mutex still locked
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=88828190f0073bd8f9aa5e2b1caf753d289c6d49;p=linux.git

ceph: throw a warning if we destroy session with mutex still locked

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 20fab5c72d39a..de6bb88298372 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -659,6 +659,7 @@ void ceph_put_mds_session(struct ceph_mds_session *s)
 	if (refcount_dec_and_test(&s->s_ref)) {
 		if (s->s_auth.authorizer)
 			ceph_auth_destroy_authorizer(s->s_auth.authorizer);
+		WARN_ON(mutex_is_locked(&s->s_mutex));
 		xa_destroy(&s->s_delegated_inos);
 		kfree(s);
 	}