From 7022ef8b2a673db3d12a348331181f579afe9b22 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Mon, 16 Dec 2013 10:45:05 +0800
Subject: [PATCH] xen-netback: fix fragments error handling in
 checksum_setup_ip()

Fix to return -EPROTO error if fragments detected in checksum_setup_ip().

Fixes: 1431fb31ecba ('xen-netback: fix fragment detection in checksum setup')
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/xen-netback/netback.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index e884ee1..27bbe58 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1197,6 +1197,9 @@ static int checksum_setup_ip(struct xenvif *vif, struct sk_buff *skb,
 
 	err = -EPROTO;
 
+	if (fragment)
+		goto out;
+
 	switch (ip_hdr(skb)->protocol) {
 	case IPPROTO_TCP:
 		err = maybe_pull_tail(skb,
-- 
2.7.4