[evolution] Bug #662568 - Use-after-free in Templates plugin signal handlers

[Milan Crha <mcrha src gnome org>]

commit 7bd4880d6c81caa7d785b49e7b05f30e76ead749
Author: Milan Crha <mcrha redhat com>
Date:   Mon Mar 25 14:13:21 2013 +0100

    Bug #662568 - Use-after-free in Templates plugin signal handlers

 plugins/templates/templates.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)
---
diff --git a/plugins/templates/templates.c b/plugins/templates/templates.c
index 7d89ac0..0d3fcdc 100644
--- a/plugins/templates/templates.c
+++ b/plugins/templates/templates.c
@@ -99,6 +99,13 @@ static void templates_folder_msg_changed_cb (CamelFolder *folder,
 static gboolean plugin_enabled;
 
 static void
+disconnect_signals_on_dispose (gpointer object_with_signal,
+                              GObject *signal_data)
+{
+       g_signal_handlers_disconnect_by_data (object_with_signal, signal_data);
+}
+
+static void
 async_context_free (AsyncContext *context)
 {
        if (context->activity != NULL)
@@ -1083,12 +1090,14 @@ build_template_menus_recurse (CamelStore *local_store,
 
                /* Disconnect previous connection to avoid possible multiple calls because
                 * folder is a persistent structure */
-               g_signal_handlers_disconnect_by_func (
-                       folder, G_CALLBACK (templates_folder_msg_changed_cb), shell_window);
+               if (g_signal_handlers_disconnect_by_func (
+                       folder, G_CALLBACK (templates_folder_msg_changed_cb), shell_window))
+                       g_object_weak_unref (G_OBJECT (shell_window), disconnect_signals_on_dispose, folder);
                g_signal_connect (
                        folder, "changed",
                        G_CALLBACK (templates_folder_msg_changed_cb),
                        shell_window);
+               g_object_weak_ref (G_OBJECT (shell_window), disconnect_signals_on_dispose, folder);
 
                path = g_strdup_printf ("%s/%s", menu_path, action_name);
 
@@ -1424,6 +1433,9 @@ mail_shell_view_created_cb (EShellWindow *shell_window,
                local_store, "folder-renamed",
                G_CALLBACK (templates_folder_renamed_cb), shell_window);
 
+       g_object_weak_ref (G_OBJECT (shell_window), disconnect_signals_on_dispose, folder);
+       g_object_weak_ref (G_OBJECT (shell_window), disconnect_signals_on_dispose, local_store);
+
        g_signal_connect (
                shell_view, "update-actions",
                G_CALLBACK (update_actions_cb), action_group);