alibaba/ali_kernel — pull request #2 by jesuszhu (2013-05-22 03:24:02+00:00)
Title: veth: Dont kfree_skb() after dev_forward_skb()

In case of congestion, netif_rx() frees the skb, so we must assume
dev_forward_skb() also consume skb.

Bug introduced by commit 445409602c092
(veth: move loopback logic to common location)

We must change dev_forward_skb() to always consume skb, and veth to not
double free it.

Bug report : http://marc.info/?l=linux-netdev&m=127310770900442&w=3

Reported-by: Martín Ferrari
Signed-off-by: Eric Dumazet
Signed-off-by: David S. Miller
Signed-off-by: Zhu Yanhai
Patch-mainline: 6ec82562ffc6f297d0de36d65776cff8e5704867

[Note] This is a mainline patch with a slightly modification to
avoid conflicts.