Re: [PATCH v3 2/2] net/core: dev_forward_skb() should clear skb_iif

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From: Benjamin LaHaise <bcrl@xxxxxxxxx>
Date: Tue, 27 Mar 2012 21:55:44 -0400

> 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@xxxxxxxxx>

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