bridge: netfilter: fix update_pmtu crash with GRE

[net-next-2.6.git] / net / bridge / br_netfilter.c

diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index fa5cda4e552ab0088901a2820f4267d31b303030..45f61c348e369c7a78d2fd91d8a14fb1ea75b7e5 100644 (file)
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -101,6 +101,18 @@ static inline __be16 pppoe_proto(const struct sk_buff *skb)
         pppoe_proto(skb) == htons(PPP_IPV6) && \
         brnf_filter_pppoe_tagged)
 
+static void fake_update_pmtu(struct dst_entry *dst, u32 mtu)
+{
+}
+
+static struct dst_ops fake_dst_ops = {
+       .family =               AF_INET,
+       .protocol =             __constant_htons(ETH_P_IP),
+       .update_pmtu =          fake_update_pmtu,
+       .entry_size =           sizeof(struct rtable),
+       .entries =              ATOMIC_INIT(0),
+};
+
 /*
  * Initialize bogus route table used to keep netfilter happy.
  * Currently, we fill in the PMTU entry because netfilter
@@ -117,6 +129,7 @@ void br_netfilter_rtable_init(struct net_bridge *br)
        rt->u.dst.path = &rt->u.dst;
        rt->u.dst.metrics[RTAX_MTU - 1] = 1500;
        rt->u.dst.flags = DST_NOXFRM;
+       rt->u.dst.ops = &fake_dst_ops;
 }
 
 static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)