ipv6: ip6_forward: perform skb->pkt_type check at the beginning

Packets which have L2 address different from ours should be
already filtered before entering into ip6_forward().

Perform that check at the beginning to avoid processing such packets.

Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 2bc10701182b..90dd551fdd3c 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -367,6 +367,9 @@ int ip6_forward(struct sk_buff *skb)
         if (net->ipv6.devconf_all->forwarding == 0)
                 goto error;
 
+        if (skb->pkt_type != PACKET_HOST)
+                goto drop;
+
         if (skb_warn_if_lro(skb))
                 goto drop;
 
@@ -376,9 +379,6 @@ int ip6_forward(struct sk_buff *skb)
                 goto drop;
         }
 
-        if (skb->pkt_type != PACKET_HOST)
-                goto drop;
-
         skb_forward_csum(skb);
 
         /*