[Xen-devel] [PATCH -next] xen-netback: fix fragments error handling in checksum_setup_ip()

[Wei Yongjun <weiyj.lk@xxxxxxxxx>]

From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxxxx>
---
 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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