diff -up wpa_supplicant-0.5.7/wpa_supplicant.c.global-iface-segfault-fix wpa_supplicant-0.5.7/wpa_supplicant.c
--- wpa_supplicant-0.5.7/wpa_supplicant.c.global-iface-segfault-fix	2007-10-09 17:34:25.000000000 -0400
+++ wpa_supplicant-0.5.7/wpa_supplicant.c	2007-10-09 17:35:17.000000000 -0400
@@ -2352,7 +2352,8 @@ static void wpa_supplicant_deinit_iface(
 		wpa_clear_keys(wpa_s, NULL);
 	}
 
-	wpas_dbus_unregister_iface(wpa_s);
+	if (wpa_s->global)
+		wpas_dbus_unregister_iface(wpa_s);
 
 	wpa_supplicant_cleanup(wpa_s);