From 7377324e5bb2ed4c89e9d60691462a7272ee08a5 Mon Sep 17 00:00:00 2001
From: Chengguang Xu <cgxu519@icloud.com>
Date: Sun, 11 Feb 2018 09:33:28 +0800
Subject: [PATCH] libceph: fix misjudgement of maximum monitor number

num_mon should allow up to CEPH_MAX_MON in ceph_monmap_decode().

Signed-off-by: Chengguang Xu <cgxu519@icloud.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
 net/ceph/mon_client.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
index 1547107f4854..b3dac24412d3 100644
--- a/net/ceph/mon_client.c
+++ b/net/ceph/mon_client.c
@@ -60,7 +60,7 @@ struct ceph_monmap *ceph_monmap_decode(void *p, void *end)
 	num_mon = ceph_decode_32(&p);
 	ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad);
 
-	if (num_mon >= CEPH_MAX_MON)
+	if (num_mon > CEPH_MAX_MON)
 		goto bad;
 	m = kmalloc(sizeof(*m) + sizeof(m->mon_inst[0])*num_mon, GFP_NOFS);
 	if (m == NULL)
-- 
2.30.9