netdev - [PATCH -next] xen-netback: fix fragments error handling in checksum_setup

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Message-ID: <CAPgLHd97T5bVtCEubkNqChBjSoA5V4Cka=ZQUn=JoYjPCuVE6A@mail.gmail.com>
Date:	Mon, 16 Dec 2013 10:45:05 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	ian.campbell@...rix.com, wei.liu2@...rix.com,
	paul.durrant@...rix.com, zoltan.kiss@...rix.com,
	davem@...emloft.net
Cc:	yongjun_wei@...ndmicro.com.cn, xen-devel@...ts.xenproject.org,
	netdev@...r.kernel.org
Subject: [PATCH -next] xen-netback: fix fragments error handling in checksum_setup_ip()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

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@...ndmicro.com.cn>
---
 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 800496b..773b731 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1099,6 +1099,9 @@ 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,

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