From baeacdcfd3ce30b3fa89ebdd4e53c60c38c26c31 Mon Sep 17 00:00:00 2001
From: "Ondrej Zajicek (work)" <santiago@crfreenet.org>
Date: Mon, 10 Dec 2018 02:11:42 +0100
Subject: [PATCH] OSPF: Fix reconfiguration of vlinks

Fix crash during reconfiguration of OSPF config with vlinks. When vlink
is reconfigured, a generic iface-reconfiguration code is used, which in
one place supposes that it is running on a regular iface.

Thanks to Cybertinus for a bugreport.
---
 proto/ospf/iface.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/proto/ospf/iface.c b/proto/ospf/iface.c
index 54a355b6..388c91c8 100644
--- a/proto/ospf/iface.c
+++ b/proto/ospf/iface.c
@@ -531,6 +531,10 @@ add_nbma_node(struct ospf_iface *ifa, struct nbma_node *src, int found)
 static int
 ospf_iface_stubby(struct ospf_iface_patt *ip, struct ifa *addr)
 {
+  /* vlink cannot be stub */
+  if (ip->type == OSPF_IT_VLINK)
+    return 0;
+
   /* a host address */
   if (addr->flags & IA_HOST)
     return 1;