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xen-netfront: be more drop monitor friendly

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xennet_start_xmit() might copy skb with inappropriate layout
into a fresh one.

Old skb is freed, and at this point it is not a drop, but
a consume. New skb will then be either consumed or dropped.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-08-30 10:32:58 -07:00 committed by David S. Miller
parent 90774a93ef
commit 62f3250f3d
1 changed files with 1 additions and 1 deletions
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2
drivers/net/xen-netfront.c
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@ -611,7 +611,7 @@ static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
nskb = skb_copy(skb, GFP_ATOMIC);
if (!nskb)
goto drop;
dev_kfree_skb_any(skb);
dev_consume_skb_any(skb);
skb = nskb;
page = virt_to_page(skb->data);
offset = offset_in_page(skb->data);