netfilter 02/09: bridge: Fix handling of non-IP packets in FORWARD/POST_ROUTING

Currently the bridge FORWARD/POST_ROUTING chains treats all
non-IPv4 packets as IPv6.  This packet fixes that by returning
NF_ACCEPT on non-IP packets instead, just as is done in PRE_ROUTING.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/bridge/br_netfilter.c

@@ -686,8 +686,11 @@ static unsigned int br_nf_forward_ip(unsigned int hook, struct sk_buff *skb,
 	if (skb->protocol == htons(ETH_P_IP) || IS_VLAN_IP(skb) ||
 	    IS_PPPOE_IP(skb))
 		pf = PF_INET;
-	else
+	else if (skb->protocol == htons(ETH_P_IPV6) || IS_VLAN_IPV6(skb) ||
+		 IS_PPPOE_IPV6(skb))
 		pf = PF_INET6;
+	else
+		return NF_ACCEPT;
 
 	nf_bridge_pull_encap_header(skb);
 
@@ -828,8 +831,11 @@ static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff *skb,
 	if (skb->protocol == htons(ETH_P_IP) || IS_VLAN_IP(skb) ||
 	    IS_PPPOE_IP(skb))
 		pf = PF_INET;
-	else
+	else if (skb->protocol == htons(ETH_P_IPV6) || IS_VLAN_IPV6(skb) ||
+		 IS_PPPOE_IPV6(skb))
 		pf = PF_INET6;
+	else
+		return NF_ACCEPT;
 
 #ifdef CONFIG_NETFILTER_DEBUG
 	if (skb->dst == NULL) {