Commit d2ed8177 authored Oct 21, 2010 by Ben Greear Committed by David S. Miller Oct 21, 2010

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>

parent d836b31e

net/core/dev.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}