linux-kernel - [PATCH 1/4] libceph: allow ceph_buffer_put() to receive a NULL ceph

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Message-Id: <20190719143222.16058-2-lhenriques@suse.com>
Date:   Fri, 19 Jul 2019 15:32:19 +0100
From:   Luis Henriques <lhenriques@...e.com>
To:     Ilya Dryomov <idryomov@...il.com>,
        Jeff Layton <jlayton@...nel.org>, Sage Weil <sage@...hat.com>
Cc:     ceph-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luis Henriques <lhenriques@...e.com>
Subject: [PATCH 1/4] libceph: allow ceph_buffer_put() to receive a NULL ceph_buffer

Signed-off-by: Luis Henriques <lhenriques@...e.com>
---
 include/linux/ceph/buffer.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/ceph/buffer.h b/include/linux/ceph/buffer.h
index 5e58bb29b1a3..11cdc7c60480 100644
--- a/include/linux/ceph/buffer.h
+++ b/include/linux/ceph/buffer.h
@@ -30,7 +30,8 @@ static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b)
 
 static inline void ceph_buffer_put(struct ceph_buffer *b)
 {
-	kref_put(&b->kref, ceph_buffer_release);
+	if (b)
+		kref_put(&b->kref, ceph_buffer_release);
 }
 
 extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end);