From: Yan, Zheng <zyan@redhat.com>
Date: Mon, 28 Aug 2017 07:02:42 +0000 (+0800)
Subject: ceph: fix NULL pointer dereference in ceph_flush_snaps()
X-Git-Tag: v4.14-rc1~47^2~13
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c858a0709f991171256db74f4329a1cb8e823764;p=platform%2Fkernel%2Flinux-rpi.git

ceph: fix NULL pointer dereference in ceph_flush_snaps()

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 662ada4..5daf866 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1469,7 +1469,7 @@ out:
 
 	if (psession) {
 		*psession = session;
-	} else {
+	} else if (session) {
 		mutex_unlock(&session->s_mutex);
 		ceph_put_mds_session(session);
 	}