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

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Submitter Patrick McHardy
Date Jan. 12, 2009, 10:06 a.m.
Message ID <20090112100602.9280.31548.sendpatchset@x2.localnet>
Download mbox | patch
Permalink /patch/17903/
State Accepted
Delegated to: David Miller
Headers show

Comments

Patrick McHardy - Jan. 12, 2009, 10:06 a.m.
commit 9fa76a65a6b84254d31a8f8f5274c130737b4233
Author: Herbert Xu <herbert@gondor.apana.org.au>
Date:   Mon Jan 12 06:25:50 2009 +0100

    netfilter: 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>

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Patch

diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index a65e43a..9a1cd75 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) {