Patch "netfilter: bridge: fix IPv6 packets not being bridged with CONFIG_IPV6=n" has been added to the 4.2-stable tree

Patch "netfilter: bridge: fix IPv6 packets not being bridged with CONFIG_IPV6=n" has been added to the 4.2-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    netfilter: bridge: fix IPv6 packets not being bridged with CONFIG_IPV6=n

to the 4.2-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     netfilter-bridge-fix-ipv6-packets-not-being-bridged-with-config_ipv6-n.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 18e1db67e93ed75d9dc0d34c8d783ccf10547c2b Mon Sep 17 00:00:00 2001
From: Bernhard Thaler <bernhard.thaler@wvnet.at>
Date: Thu, 13 Aug 2015 08:58:15 +0200
Subject: netfilter: bridge: fix IPv6 packets not being bridged with CONFIG_IPV6=n

From: Bernhard Thaler <bernhard.thaler@wvnet.at>

commit 18e1db67e93ed75d9dc0d34c8d783ccf10547c2b upstream.

230ac490f7fba introduced a dependency to CONFIG_IPV6 which breaks bridging
of IPv6 packets on a bridge with CONFIG_IPV6=n.

Sysctl entry /proc/sys/net/bridge/bridge-nf-call-ip6tables defaults to 1,
for this reason packets are handled by br_nf_pre_routing_ipv6(). When compiled
with CONFIG_IPV6=n this function returns NF_DROP but should return NF_ACCEPT
to let packets through.

Change CONFIG_IPV6=n br_nf_pre_routing_ipv6() return value to NF_ACCEPT.

Tested with a simple bridge with two interfaces and IPv6 packets trying
to pass from host on left side to host on right side of the bridge.

Fixes: 230ac490f7fba ("netfilter: bridge: split ipv6 code into separated file")
Signed-off-by: Bernhard Thaler <bernhard.thaler@wvnet.at>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/net/netfilter/br_netfilter.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/net/netfilter/br_netfilter.h
+++ b/include/net/netfilter/br_netfilter.h
@@ -59,7 +59,7 @@ static inline unsigned int
 br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops, struct sk_buff *skb,
 		       const struct nf_hook_state *state)
 {
-	return NF_DROP;
+	return NF_ACCEPT;
 }
 #endif
 


Patches currently in stable-queue which might be from bernhard.thaler@wvnet.at are

queue-4.2/netfilter-bridge-fix-ipv6-packets-not-being-bridged-with-config_ipv6-n.patch