netfilter: ip6table_mangle: Fix set-but-unused variables.

The variable 'flowlabel' is set but unused in ip6t_mangle_out().

The intention here was to compare this key to the header value after
mangling, and trigger a route lookup on mismatch.

Make it so.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv6/netfilter/ip6table_mangle.c b/net/ipv6/netfilter/ip6table_mangle.c
index 679a0a3b7b3c..00d19173db7e 100644
--- a/net/ipv6/netfilter/ip6table_mangle.c
+++ b/net/ipv6/netfilter/ip6table_mangle.c
@@ -64,7 +64,8 @@ ip6t_mangle_out(struct sk_buff *skb, const struct net_device *out)
             (memcmp(&ipv6_hdr(skb)->saddr, &saddr, sizeof(saddr)) ||
              memcmp(&ipv6_hdr(skb)->daddr, &daddr, sizeof(daddr)) ||
              skb->mark != mark ||
-             ipv6_hdr(skb)->hop_limit != hop_limit))
+             ipv6_hdr(skb)->hop_limit != hop_limit ||
+             flowlabel != *((u_int32_t *)ipv6_hdr(skb))))
                 return ip6_route_me_harder(skb) == 0 ? ret : NF_DROP;
 
         return ret;