gre: When GRE csum is present count as encap layer wrt csum
In GRE demux if the GRE checksum pop rcv encapsulation so that any
encapsulated checksums are treated as tunnel checksums.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c
index 0485bf7..7c1a8ff 100644
--- a/net/ipv4/gre_demux.c
+++ b/net/ipv4/gre_demux.c
@@ -125,6 +125,7 @@
*csum_err = true;
return -EINVAL;
}
+ skb_pop_rcv_encapsulation(skb);
options++;
}