[BRIDGE-NF]: Fix iptables redirect on bridge interface

Here's a slightly altered patch, originally from Mark Glines who
diagnosed and fixed the problem.

Signed-off-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 3 deletions

diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index 2d52fee63a8c..d8e36b775125 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -214,9 +214,11 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
                                      .tos = RT_TOS(iph->tos)} }, .proto = 0};
 
                         if (!ip_route_output_key(&rt, &fl)) {
-                                /* Bridged-and-DNAT'ed traffic doesn't
-                                 * require ip_forwarding. */
-                                if (((struct dst_entry *)rt)->dev == dev) {
+                                /* - Bridged-and-DNAT'ed traffic doesn't
+                                 *   require ip_forwarding.
+                                 * - Deal with redirected traffic. */
+                                if (((struct dst_entry *)rt)->dev == dev ||
+                                    rt->rt_type == RTN_LOCAL) {
                                         skb->dst = (struct dst_entry *)rt;
                                         goto bridged_dnat;
                                 }