gdbus: Fix match rule for NameOwnerChanged

When subscribing to the D-Bus signal NameOwnerChanged from the bus driver,
specify the object path and the sender in the match rule. Otherwise, random
connections on the bus could impersonate the bus driver.

diff --git a/gdbus/watch.c b/gdbus/watch.c
index 2f5e865..0d0054c 100644 (file)
--- a/gdbus/watch.c
+++ b/gdbus/watch.c
@@ -703,7 +703,8 @@ guint g_dbus_add_service_watch(DBusConnection *connection, const char *name,
        if (name == NULL)
                return 0;
 
-       data = filter_data_get(connection, service_filter, NULL, NULL,
+       data = filter_data_get(connection, service_filter,
+                               DBUS_SERVICE_DBUS, DBUS_PATH_DBUS,
                                DBUS_INTERFACE_DBUS, "NameOwnerChanged",
                                name);
        if (data == NULL)