commit 8ed508fd4b84a38db63ddeee8ab6905f06cfa589
author Hangbin Liu <liuhangbin@gmail.com> Mon May 08 17:57:13 2017 +0800
committer David S. Miller <davem@davemloft.net> Mon May 08 15:10:31 2017 -0400
tree 847d7a2f96b86ba37fb51d44ef8b7d79b8de27a6
parent 0d0e57697f162da4aa218b5feafe614fb666db07

vti: check nla_put_* return value

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/ip_vti.c

diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index 4097741..4ec9aff 100644
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -546,12 +546,13 @@
 	struct ip_tunnel *t = netdev_priv(dev);
 	struct ip_tunnel_parm *p = &t->parms;
 
-	nla_put_u32(skb, IFLA_VTI_LINK, p->link);
-	nla_put_be32(skb, IFLA_VTI_IKEY, p->i_key);
-	nla_put_be32(skb, IFLA_VTI_OKEY, p->o_key);
-	nla_put_in_addr(skb, IFLA_VTI_LOCAL, p->iph.saddr);
-	nla_put_in_addr(skb, IFLA_VTI_REMOTE, p->iph.daddr);
-	nla_put_u32(skb, IFLA_VTI_FWMARK, t->fwmark);
+	if (nla_put_u32(skb, IFLA_VTI_LINK, p->link) ||
+	    nla_put_be32(skb, IFLA_VTI_IKEY, p->i_key) ||
+	    nla_put_be32(skb, IFLA_VTI_OKEY, p->o_key) ||
+	    nla_put_in_addr(skb, IFLA_VTI_LOCAL, p->iph.saddr) ||
+	    nla_put_in_addr(skb, IFLA_VTI_REMOTE, p->iph.daddr) ||
+	    nla_put_u32(skb, IFLA_VTI_FWMARK, t->fwmark))
+		return -EMSGSIZE;
 
 	return 0;
 }