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 <[email protected]>
Reviewed-by: Paul Durrant <[email protected]>
Acked-by: Ian Campbell <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index e884ee1fe7edf7e3fa41dd9998eb00be8ecc6d08..27bbe58dcbe7bf424fdfd54a461af847836836eb 100644 (file)
--- 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,