From: Madalin Bucur <madalin.bucur@freescale.com>
Date: Mon, 26 Sep 2011 07:04:56 +0000 (+0000)
Subject: ipv6: check return value for dst_alloc
X-Git-Tag: firefly_0821_release~7613^2~108
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a0e6c2f9f297c760797980d9ccfe2eb00fc5b46d;p=firefly-linux-kernel-4.4.55.git

ipv6: check return value for dst_alloc

return value of dst_alloc must be checked before use

Signed-off-by: Madalin Bucur <madalin.bucur@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 8e600f827fe7..7ef5d0820185 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -233,7 +233,9 @@ static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops,
 {
 	struct rt6_info *rt = dst_alloc(ops, dev, 0, 0, flags);
 
-	memset(&rt->rt6i_table, 0, sizeof(*rt) - sizeof(struct dst_entry));
+	if (rt != NULL)
+		memset(&rt->rt6i_table, 0,
+			sizeof(*rt) - sizeof(struct dst_entry));
 
 	return rt;
 }