[IPV6]: Remove redundant length check on input
We don't need to check skb->len when we're just about to call
pskb_may_pull since that checks it for us.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index aceee25..df8f051 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -84,14 +84,9 @@
*/
IP6CB(skb)->iif = skb->dst ? ((struct rt6_info *)skb->dst)->rt6i_idev->dev->ifindex : dev->ifindex;
- if (skb->len < sizeof(struct ipv6hdr))
+ if (unlikely(!pskb_may_pull(skb, sizeof(*hdr))))
goto err;
- if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) {
- IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
- goto drop;
- }
-
hdr = skb->nh.ipv6h;
if (hdr->version != 6)
