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net/core: Allow tagged VLAN packets to flow through VETH devices. 

When there are VLANs on a VETH device, the packets being transmitted
through the VETH device may be 4 bytes bigger than MTU.  A check
in dev_forward_skb did not take this into account and so dropped
these packets.

This patch is needed at least as far back as 2.6.34.7 and should
be considered for -stable.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Greear 2010-10-21 04:06:29 -07:00 committed by David S. Miller
parent d836b31e16
commit d2ed817766
1 changed files with 1 additions and 1 deletions
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2
net/core/dev.c
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@ -1485,7 +1485,7 @@ int dev_forward_skb(struct net_device *dev, struct sk_buff *skb)
nf_reset(skb);
if (!(dev->flags & IFF_UP) ||
(skb->len > (dev->mtu + dev->hard_header_len))) {
(skb->len > (dev->mtu + dev->hard_header_len + VLAN_HLEN))) {
kfree_skb(skb);
return NET_RX_DROP;
}