net/core: dev_forward_skb() should clear skb_iif
authorBenjamin LaHaise <bcrl@kvack.org>
Tue, 27 Mar 2012 15:55:44 +0000 (15:55 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 28 Mar 2012 08:45:37 +0000 (04:45 -0400)
commit3b9785c6b0ff37ac4ef5085b38756283da84dceb
tree08592027bcbba8ccc9074011868228a9b0f0ab7d
parent4e7b2f1454382b220f792a7fbcbebd0985187161
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>
net/core/dev.c