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>
diff --git a/net/core/dev.c b/net/core/dev.c
index 660dd41..8e07109 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1485,7 +1485,7 @@
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;
}