[PATCH] Fix calculation of AH length during filling ancillary data.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

net/ipv6/datagram.c

@@ -437,7 +437,7 @@ int datagram_recv_ctl(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
 				break;
 			case IPPROTO_AH:
 				nexthdr = ptr[0];
-				len = (ptr[1] + 1) << 2;
+				len = (ptr[1] + 2) << 2;
 				break;
 			default:
 				nexthdr = ptr[0];