netfilter: netns: fix {ip,6}_route_me_harder() in netns

Take netns from skb->dst->dev. It should be safe because, they are called
from LOCAL_OUT hook where dst is valid (though, I'm not exactly sure about
IPVS and queueing packets to userspace).

[Patrick: its safe everywhere since they already expect skb->dst to be set]

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 8c6c5e71f210..4cb4844a3220 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -23,7 +23,7 @@ int ip6_route_me_harder(struct sk_buff *skb)
                     .saddr = iph->saddr, } },
         };
 
-        dst = ip6_route_output(&init_net, skb->sk, &fl);
+        dst = ip6_route_output(dev_net(skb->dst->dev), skb->sk, &fl);
 
 #ifdef CONFIG_XFRM
         if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&