From: Tom Gundersen <teg@jklm.no>
Date: Thu, 14 Aug 2014 01:35:16 +0200
Subject: udev: link-config - fix crash due to missing hwaddr

Reported by: master.nosferatu@gmail.com
---
 src/udev/net/link-config.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c
index 5a45c53..3cc0471 100644
--- a/src/udev/net/link-config.c
+++ b/src/udev/net/link-config.c
@@ -247,11 +247,12 @@ int link_config_get(link_config_ctx *ctx, struct udev_device *device, link_confi
         link_config *link;
 
         LIST_FOREACH(links, link, ctx->links) {
+                const char* attr_value = udev_device_get_sysattr_value(device, "address");
 
                 if (net_match_config(link->match_mac, link->match_path, link->match_driver,
                                      link->match_type, NULL, link->match_host,
                                      link->match_virt, link->match_kernel, link->match_arch,
-                                     ether_aton(udev_device_get_sysattr_value(device, "address")),
+                                     attr_value ? ether_aton(attr_value) : NULL,
                                      udev_device_get_property_value(device, "ID_PATH"),
                                      udev_device_get_driver(udev_device_get_parent(device)),
                                      udev_device_get_property_value(device, "ID_NET_DRIVER"),
