[IPV6]: Fix ipv6 GSO payload length

Fix ipv6 GSO payload length calculation.

The ipv6 payload length excludes the ipv6 base header length and so
must be subtracted.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index ec59344478d2..0c17dec11c8d 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -119,7 +119,8 @@ unlock:
 
         for (skb = segs; skb; skb = skb->next) {
                 ipv6h = skb->nh.ipv6h;
-                ipv6h->payload_len = htons(skb->len - skb->mac_len);
+                ipv6h->payload_len = htons(skb->len - skb->mac_len -
+                                           sizeof(*ipv6h));
         }
 
 out: