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net/core: dev_forward_skb() should clear skb_iif
While investigating another bug, I found that the code on the incoming path in __netif_receive_skb will only set skb->skb_iif if it is already 0. When dev_forward_skb() is used in the case of interfaces like veth, skb_iif may already have been set. Making dev_forward_skb() cause the packet to look like a newly received packet would seem to the the correct behaviour here, as otherwise the wrong incoming interface can be reported for such a packet. Signed-off-by: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1597,6 +1597,7 @@ int dev_forward_skb(struct net_device *dev, struct sk_buff *skb)
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kfree_skb(skb);
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return NET_RX_DROP;
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}
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skb->skb_iif = 0;
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skb_set_dev(skb, dev);
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skb->tstamp.tv64 = 0;
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skb->pkt_type = PACKET_HOST;
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