[glib] _g_dbus_worker_new: hold a ref until we have done the initial read

[David Zeuthen <davidz src gnome org>]

commit e34e8a25a04f31e7436af297fced96bbfc4b4f79
Author: Simon McVittie <simon mcvittie collabora co uk>
Date:   Mon Sep 12 18:42:36 2011 +0100

    _g_dbus_worker_new: hold a ref until we have done the initial read
    
    Otherwise, we could use-after-free the GDBusWorker, if its last-unref
    is immediately after _g_dbus_worker_new returns (before the worker thread
    does its initial read).
    
    Bug: https://bugzilla.gnome.org/show_bug.cgi?id=651268
    Bug-NB: NB#271520
    Signed-off-by: Simon McVittie <simon mcvittie collabora co uk>
    Signed-off-by: David Zeuthen <davidz redhat com>

 gio/gdbusprivate.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gio/gdbusprivate.c b/gio/gdbusprivate.c
index 4b2243d..87a3b6b 100644
--- a/gio/gdbusprivate.c
+++ b/gio/gdbusprivate.c
@@ -1590,8 +1590,8 @@ _g_dbus_worker_new (GIOStream                              *stream,
   g_source_set_priority (idle_source, G_PRIORITY_DEFAULT);
   g_source_set_callback (idle_source,
                          _g_dbus_worker_do_initial_read,
-                         worker,
-                         NULL);
+                         _g_dbus_worker_ref (worker),
+                         (GDestroyNotify) _g_dbus_worker_unref);
   g_source_attach (idle_source, worker->shared_thread_data->context);
   g_source_unref (idle_source);