From cc7c1b956eb56414f43e2490d40f25807abbcfc5 Mon Sep 17 00:00:00 2001
From: dlg <dlg@openbsd.org>
Date: Wed, 21 Feb 2018 05:20:17 +0000
Subject: [PATCH] if egre takes the packet, it's done, don't fall through to l3
 processing.

---
 sys/net/if_gre.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/net/if_gre.c b/sys/net/if_gre.c
index b7841ed93ff..aba9013f53e 100644
--- a/sys/net/if_gre.c
+++ b/sys/net/if_gre.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_gre.c,v 1.108 2018/02/21 05:19:11 dlg Exp $ */
+/*	$OpenBSD: if_gre.c,v 1.109 2018/02/21 05:20:17 dlg Exp $ */
 /*	$NetBSD: if_gre.c,v 1.9 1999/10/25 19:18:11 drochner Exp $ */
 
 /*
@@ -563,6 +563,8 @@ gre_input_key(struct mbuf **mp, int *offp, int type, int af,
 	if (gh->gre_proto == htons(ETHERTYPE_TRANSETHER)) {
 		if (egre_input(key, m, hlen) == -1)
 			goto decline;
+
+		return (IPPROTO_DONE);
 	}
 
 	sc = gre_find(key);
-- 
2.20.1