Check return value from reading name_assign_type attr

This file won't exist on kernels earlier than 3.17.

diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index bbc6475df059f272dba9be765366b681e17c75b4..75cc7d2f7b38059edcbcc95c05ead3744f4c2c64 100644 (file)
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -231,7 +231,8 @@ int network_get(Manager *manager, struct udev_device *device,
 
                         if (network->match_name) {
                                 attr = udev_device_get_sysattr_value(device, "name_assign_type");
-                                (void)safe_atou8(attr, &name_assign_type);
+                                if (attr)
+                                        (void)safe_atou8(attr, &name_assign_type);
 
                                 if (name_assign_type == NET_NAME_ENUM)
                                         log_warning("%-*s: found matching network '%s', based on potentially unstable ifname",