From c259649f35faee8cbda3e8ddd3f96c5b71661d62 Mon Sep 17 00:00:00 2001
From: msaitoh <msaitoh@NetBSD.org>
Date: Thu, 23 May 2013 16:49:46 +0000
Subject: [PATCH] Clear mbuf's csum_flags in ip6flow_fastforward(). Fixes
 PR#47849.

---
 sys/netinet6/ip6_flow.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/sys/netinet6/ip6_flow.c b/sys/netinet6/ip6_flow.c
index c659cc2f90bd..c818e862cb89 100644
--- a/sys/netinet6/ip6_flow.c
+++ b/sys/netinet6/ip6_flow.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ip6_flow.c,v 1.20 2012/10/11 20:05:50 christos Exp $	*/
+/*	$NetBSD: ip6_flow.c,v 1.21 2013/05/23 16:49:46 msaitoh Exp $	*/
 
 /*-
  * Copyright (c) 2007 The NetBSD Foundation, Inc.
@@ -38,7 +38,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ip6_flow.c,v 1.20 2012/10/11 20:05:50 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ip6_flow.c,v 1.21 2013/05/23 16:49:46 msaitoh Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -288,6 +288,11 @@ ip6flow_fastforward(struct mbuf **mp)
 		return 0;
 	}
 
+	/*
+	 * Clear any in-bound checksum flags for this packet.
+	 */
+	m->m_pkthdr.csum_flags = 0;
+
 	if (ip6->ip6_hlim <= IPV6_HLIMDEC)
 		return 0;