Commit 14051f04 authored Oct 30, 2014 by Tom Herbert Committed by David S. Miller Oct 30, 2014

gre: Use inner mac length when computing tunnel length



Currently, skb_inner_network_header is used but this does not account
for Ethernet header for ETH_P_TEB. Use skb_inner_mac_header which
handles TEB and also should work with IP encapsulation in which case
inner mac and inner network headers are the same.

Tested: Ran TCP_STREAM over GRE, worked as expected.

Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 292dd654

net/ipv4/gre_offload.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -47,7 +47,7 @@ static struct sk_buff gre_gso_segment(struct sk_buff skb,

		greh = (struct gre_base_hdr *)skb_transport_header(skb);

		ghl = skb_inner_network_header(skb) - skb_transport_header(skb);
		ghl = skb_inner_mac_header(skb) - skb_transport_header(skb);
		if (unlikely(ghl < sizeof(*greh)))
		goto out;