on reload, check for null ifname before comparing it

diff --git a/interface.c b/interface.c
index d0eec4a7b70d45c89bd9347e5aaf4af21059a0e1..a8f7b8f01267f9e519d9d52fe978b067879cd126 100644 (file)
--- a/interface.c
+++ b/interface.c
@@ -475,8 +475,9 @@ interface_change_config(struct interface *if_old, struct interface *if_new)
        if_old->ifname = if_new->ifname;
        if_old->proto_handler = if_new->proto_handler;
 
-       if (strcmp(old_ifname, if_new->ifname) != 0 ||
-               proto != if_new->proto_handler) {
+       if ((!!old_ifname != !!if_new->ifname) ||
+           (old_ifname && strcmp(old_ifname, if_new->ifname) != 0) ||
+           proto != if_new->proto_handler) {
                D(INTERFACE, "Reload interface '%s' because of ifname/proto change\n",
                  if_old->name);
                goto reload;