[NETFILTER]: xt_TCPMSS: remove network triggerable WARN_ON

ipv6_skip_exthdr() returns -1 for invalid packets. don't WARN_ON
that.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 1 insertions, 3 deletions

diff --git a/net/netfilter/xt_TCPMSS.c b/net/netfilter/xt_TCPMSS.c
index 07435a602b11..8e76d1f52fbe 100644
--- a/net/netfilter/xt_TCPMSS.c
+++ b/net/netfilter/xt_TCPMSS.c
@@ -174,10 +174,8 @@ xt_tcpmss_target6(struct sk_buff *skb,
 
         nexthdr = ipv6h->nexthdr;
         tcphoff = ipv6_skip_exthdr(skb, sizeof(*ipv6h), &nexthdr);
-        if (tcphoff < 0) {
-                WARN_ON(1);
+        if (tcphoff < 0)
                 return NF_DROP;
-        }
         ret = tcpmss_mangle_packet(skb, targinfo, tcphoff,
                                    sizeof(*ipv6h) + sizeof(struct tcphdr));
         if (ret < 0)