Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[cascardo/linux.git] / net / ipv6 / ip6_input.c

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index f77a601..34e5a96 100644 (file)
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -100,6 +100,15 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
        if (hdr->version != 6)
                goto err;
 
+       /*
+        * RFC4291 2.5.3
+        * A packet received on an interface with a destination address
+        * of loopback must be dropped.
+        */
+       if (!(dev->flags & IFF_LOOPBACK) &&
+           ipv6_addr_loopback(&hdr->daddr))
+               goto err;
+
        skb->transport_header = skb->network_header + sizeof(*hdr);
        IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);