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: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 2 deletions

diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index a65e43a17fb..9a1cd757ec4 100644
--- a/net/bridge/br_netfilter.c
+++ b/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) {