blobmsg_add_string(&b, "proto", iface->proto_handler->name);
dev = iface->main_dev.dev;
- if (dev && !dev->hidden &&
+ if (dev && !dev->hidden && iface->proto_handler &&
!(iface->proto_handler->flags & PROTO_FLAG_NODEV))
blobmsg_add_string(&b, "device", dev->ifname);