gre: strip gre-tso offload flags
if the gro enable, ipgre receive a gre-tso package. After pop
the gre-tunnel the encapsulation and GSO_ENCAP flags should be
striped. or the packet encap again and will be dropped in
ovs_iptunnel_handle_offloads
Tested-by: Greg Rose
@@ -140,6 +140,8 @@ static int ipgre_rcv(struct sk_buff *skb, const struct tnl_ptk_info *tpi)
__be64 tun_id;
int err;
+ if (iptunnel_pull_offloads(skb))
+ return PACKET_REJECT;
skb_pop_mac_header(skb);
flags = tpi->flags & (TUNNEL_CSUM | TUNNEL_KEY);
