Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.2 119/258] netfilter: bridge: fix IPv6 packets not being bridged with CONFIG_IPV6=n | Date | Sat, 17 Oct 2015 18:57:12 -0700 |
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4.2-stable review patch. If anyone has any objections, please let me know.
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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
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