From 023d50db40912e4f7ee333543e05995a9c730bae Mon Sep 17 00:00:00 2001
From: fujiwarat <takao.fujiwara1@gmail.com>
Date: Fri, 15 May 2020 21:44:16 +0900
Subject: [PATCH] Fix SEGV in bus_panel_proxy_focus_in()
rhbz#1350291 SEGV in BUS_IS_CONNECTION(skip_connection) in
bus_dbus_impl_dispatch_message_by_rule()
check if dbus_connection is closed in bus_dbus_impl_connection_filter_cb().
rhbz#1767976 SEGV in assert(connection != NULL) in
bus_dbus_impl_connection_filter_cb()
call bus_connection_set_filter() in bus_dbus_impl_destroy().
rhbz#1601577 rhbz#1797726 SEGV in ibus_engine_desc_get_layout() in
bus_engine_proxy_new_internal()
WIP: Added a GError to get the error message to check why the SEGV happened.
rhbz#1663528 SEGV in g_mutex_clear() in bus_dbus_impl_destroy()
If the mutex is not unlocked, g_mutex_clear() causes assert.
rhbz#1767691 SEGV in client/x11/main.c:_sighandler().
Do not call atexit functions in _sighandler().
rhbz#1795499 SEGV in ibus_bus_get_bus_address() because of no _bus->priv.
_changed_cb() should not be called after ibus_bus_destroy() is called.
rhbz#1771238 SEGV in assert(m_loop == null) in switcher.vala.
Grabbing keyboard could be failed and switcher received the keyboard
events and m_loop was not released.
rhbz#1797120 SEGV in assert(bus.is_connected()) in panel_binding_construct()
Check m_ibus in extension.vala:bus_name_acquired_cb()
BUG=rhbz#1350291
BUG=rhbz#1601577
BUG=rhbz#1663528
BUG=rhbz#1767691
BUG=rhbz#1795499
BUG=rhbz#1771238
BUG=rhbz#1767976
BUG=rhbz#1797120
---
bus/dbusimpl.c | 47 ++++++++++++++++++++++++---
bus/engineproxy.c | 51 ++++++++++++++++++++++-------
client/x11/main.c | 8 ++++-
src/ibusbus.c | 5 +++
ui/gtk3/extension.vala | 4 +++
ui/gtk3/switcher.vala | 73 +++++++++++++++++++++++++-----------------
6 files changed, 141 insertions(+), 47 deletions(-)
diff --git a/bus/dbusimpl.c b/bus/dbusimpl.c
index 59787a80..af2fbde2 100644
--- a/bus/dbusimpl.c
+++ b/bus/dbusimpl.c
@@ -610,6 +610,7 @@ static void
bus_dbus_impl_destroy (BusDBusImpl *dbus)
{
GList *p;
+ int i;
for (p = dbus->objects; p != NULL; p = p->next) {
IBusService *object = (IBusService *) p->data;
@@ -633,6 +634,10 @@ bus_dbus_impl_destroy (BusDBusImpl *dbus)
for (p = dbus->connections; p != NULL; p = p->next) {
BusConnection *connection = BUS_CONNECTION (p->data);
+ /* rhbz#1767976 Fix connection == NULL in
+ * bus_dbus_impl_connection_filter_cb()
+ */
+ bus_connection_set_filter (connection, NULL, NULL, NULL);
g_signal_handlers_disconnect_by_func (connection,
bus_dbus_impl_connection_destroy_cb, dbus);
ibus_object_destroy (IBUS_OBJECT (connection));
@@ -647,12 +652,39 @@ bus_dbus_impl_destroy (BusDBusImpl *dbus)
dbus->unique_names = NULL;
dbus->names = NULL;
+ for (i = 0; g_idle_remove_by_data (dbus); i++) {
+ if (i > 1000) {
+ g_warning ("Too many idle threads were generated by " \
+ "bus_dbus_impl_forward_message_idle_cb and " \
+ "bus_dbus_impl_dispatch_message_by_rule_idle_cb");
+ break;
+ }
+ }
g_list_free_full (dbus->start_service_calls,
(GDestroyNotify) bus_method_call_free);
dbus->start_service_calls = NULL;
- g_mutex_clear (&dbus->dispatch_lock);
- g_mutex_clear (&dbus->forward_lock);
+ /* rhbz#1663528 Call g_mutex_trylock() before g_mutex_clear()
+ * because if the mutex is not unlocked, g_mutex_clear() causes assert.
+ */
+#define BUS_DBUS_MUTEX_SAFE_CLEAR(mtex) { \
+ int count = 0; \
+ while (!g_mutex_trylock ((mtex))) { \
+ g_usleep (1); \
+ if (count > 60) { \
+ g_warning (#mtex " is dead lock"); \
+ break; \
+ } \
+ ++count; \
+ } \
+ g_mutex_unlock ((mtex)); \
+ g_mutex_clear ((mtex)); \
+}
+
+ BUS_DBUS_MUTEX_SAFE_CLEAR (&dbus->dispatch_lock);
+ BUS_DBUS_MUTEX_SAFE_CLEAR (&dbus->forward_lock);
+
+#undef BUS_DBUS_MUTEX_SAFE_CLEAR
/* FIXME destruct _lock and _queue members. */
IBUS_OBJECT_CLASS(bus_dbus_impl_parent_class)->destroy ((IBusObject *) dbus);
@@ -1483,13 +1515,20 @@ bus_dbus_impl_connection_filter_cb (GDBusConnection *dbus_connection,
gboolean incoming,
gpointer user_data)
{
+ BusDBusImpl *dbus;
+ BusConnection *connection;
+
g_assert (G_IS_DBUS_CONNECTION (dbus_connection));
g_assert (G_IS_DBUS_MESSAGE (message));
g_assert (BUS_IS_DBUS_IMPL (user_data));
- BusDBusImpl *dbus = (BusDBusImpl *) user_data;
- BusConnection *connection = bus_connection_lookup (dbus_connection);
+ if (g_dbus_connection_is_closed (dbus_connection))
+ return NULL;
+
+ dbus = (BusDBusImpl *) user_data;
+ connection = bus_connection_lookup (dbus_connection);
g_assert (connection != NULL);
+ g_assert (BUS_IS_CONNECTION (connection));
if (incoming) {
/* is incoming message */
diff --git a/bus/engineproxy.c b/bus/engineproxy.c
index 2d98995c..bbbe5532 100644
--- a/bus/engineproxy.c
+++ b/bus/engineproxy.c
@@ -660,20 +660,33 @@ bus_engine_proxy_g_signal (GDBusProxy *proxy,
g_return_if_reached ();
}
+#pragma GCC optimize ("O0")
static BusEngineProxy *
bus_engine_proxy_new_internal (const gchar *path,
IBusEngineDesc *desc,
- GDBusConnection *connection)
+ GDBusConnection *connection,
+ GError **error)
{
+ GDBusProxyFlags flags;
+ BusEngineProxy *engine;
+
g_assert (path);
g_assert (IBUS_IS_ENGINE_DESC (desc));
g_assert (G_IS_DBUS_CONNECTION (connection));
+ g_assert (error && *error == NULL);
- GDBusProxyFlags flags = G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START;
- BusEngineProxy *engine =
+ /* rhbz#1601577 engine == NULL if connection is closed. */
+ if (g_dbus_connection_is_closed (connection)) {
+ *error = g_error_new (G_DBUS_ERROR,
+ G_DBUS_ERROR_FAILED,
+ "Connection is closed.");
+ return NULL;
+ }
+ flags = G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START;
+ engine =
(BusEngineProxy *) g_initable_new (BUS_TYPE_ENGINE_PROXY,
NULL,
- NULL,
+ error,
"desc", desc,
"g-connection", connection,
"g-interface-name", IBUS_INTERFACE_ENGINE,
@@ -681,12 +694,19 @@ bus_engine_proxy_new_internal (const gchar *path,
"g-default-timeout", g_gdbus_timeout,
"g-flags", flags,
NULL);
+ /* FIXME: rhbz#1601577 */
+ if (!engine) {
+ /* show abrt local variable */
+ gchar *message = g_strdup ((*error)->message);
+ g_error ("%s", message);
+ }
const gchar *layout = ibus_engine_desc_get_layout (desc);
if (layout != NULL && layout[0] != '\0') {
engine->keymap = ibus_keymap_get (layout);
}
return engine;
}
+#pragma GCC reset_options
typedef struct {
GTask *task;
@@ -748,23 +768,30 @@ create_engine_ready_cb (BusFactoryProxy *factory,
GAsyncResult *res,
EngineProxyNewData *data)
{
+ GError *error = NULL;
+ gchar *path;
+ BusEngineProxy *engine;
+
g_return_if_fail (data->task != NULL);
- GError *error = NULL;
- gchar *path = bus_factory_proxy_create_engine_finish (factory,
- res,
- &error);
+ path = bus_factory_proxy_create_engine_finish (factory, res, &error);
if (path == NULL) {
g_task_return_error (data->task, error);
engine_proxy_new_data_free (data);
return;
}
- BusEngineProxy *engine =
- bus_engine_proxy_new_internal (path,
- data->desc,
- g_dbus_proxy_get_connection ((GDBusProxy *)data->factory));
+ engine = bus_engine_proxy_new_internal (
+ path,
+ data->desc,
+ g_dbus_proxy_get_connection ((GDBusProxy *)data->factory),
+ &error);
g_free (path);
+ if (!engine) {
+ g_task_return_error (data->task, error);
+ engine_proxy_new_data_free (data);
+ return;
+ }
/* FIXME: set destroy callback ? */
g_task_return_pointer (data->task, engine, NULL);
diff --git a/client/x11/main.c b/client/x11/main.c
index c9ee174d..768b91f0 100644
--- a/client/x11/main.c
+++ b/client/x11/main.c
@@ -40,6 +40,7 @@
#include <iconv.h>
#include <signal.h>
#include <stdlib.h>
+#include <unistd.h>
#include <getopt.h>
@@ -1104,7 +1105,12 @@ _atexit_cb ()
static void
_sighandler (int sig)
{
- exit(EXIT_FAILURE);
+ /* rhbz#1767691 _sighandler() is called with SIGTERM
+ * and exit() causes SEGV during calling atexit functions.
+ * _atexit_cb() might be broken. _exit() does not call
+ * atexit functions.
+ */
+ _exit(EXIT_FAILURE);
}
static void
diff --git a/src/ibusbus.c b/src/ibusbus.c
index b7ffbb47..668c8a26 100644
--- a/src/ibusbus.c
+++ b/src/ibusbus.c
@@ -689,6 +689,11 @@ ibus_bus_destroy (IBusObject *object)
_bus = NULL;
if (bus->priv->monitor) {
+ /* rhbz#1795499 _changed_cb() causes SEGV because of no bus->priv
+ * after ibus_bus_destroy() is called.
+ */
+ g_signal_handlers_disconnect_by_func (bus->priv->monitor,
+ (GCallback) _changed_cb, bus);
g_object_unref (bus->priv->monitor);
bus->priv->monitor = NULL;
}
diff --git a/ui/gtk3/extension.vala b/ui/gtk3/extension.vala
index ea3cd464..57ed1357 100644
--- a/ui/gtk3/extension.vala
+++ b/ui/gtk3/extension.vala
@@ -73,6 +73,10 @@ class ExtensionGtk : Gtk.Application {
string signal_name,
Variant parameters) {
debug("signal_name = %s", signal_name);
+ /* rhbz#1797120 Fix assert(bus.is_connected()) in
+ * panel_binding_construct()
+ */
+ return_if_fail(m_bus.is_connected());
m_panel = new PanelBinding(m_bus, this);
m_panel.load_settings();
}
diff --git a/ui/gtk3/switcher.vala b/ui/gtk3/switcher.vala
index a4529c88..29a70dd5 100644
--- a/ui/gtk3/switcher.vala
+++ b/ui/gtk3/switcher.vala
@@ -140,8 +140,8 @@ class Switcher : Gtk.Window {
IBus.EngineDesc[] engines,
int index,
string input_context_path) {
- assert (m_loop == null);
- assert (index < engines.length);
+ assert(m_loop == null);
+ assert(index < engines.length);
m_is_running = true;
m_keyval = keyval;
@@ -198,16 +198,18 @@ class Switcher : Gtk.Window {
null,
event,
null);
- if (status != Gdk.GrabStatus.SUCCESS)
+ if (status != Gdk.GrabStatus.SUCCESS) {
warning("Grab keyboard failed! status = %d", status);
- status = seat.grab(get_window(),
- Gdk.SeatCapabilities.POINTER,
- true,
- null,
- event,
- null);
- if (status != Gdk.GrabStatus.SUCCESS)
- warning("Grab pointer failed! status = %d", status);
+ } else {
+ status = seat.grab(get_window(),
+ Gdk.SeatCapabilities.POINTER,
+ true,
+ null,
+ event,
+ null);
+ if (status != Gdk.GrabStatus.SUCCESS)
+ warning("Grab pointer failed! status = %d", status);
+ }
#else
Gdk.Device device = event.get_device();
if (device == null) {
@@ -243,30 +245,41 @@ class Switcher : Gtk.Window {
Gdk.EventMask.KEY_RELEASE_MASK,
null,
Gdk.CURRENT_TIME);
- if (status != Gdk.GrabStatus.SUCCESS)
+ if (status != Gdk.GrabStatus.SUCCESS) {
warning("Grab keyboard failed! status = %d", status);
- // Grab all pointer events
- status = pointer.grab(get_window(),
- Gdk.GrabOwnership.NONE,
- true,
- Gdk.EventMask.BUTTON_PRESS_MASK |
- Gdk.EventMask.BUTTON_RELEASE_MASK,
- null,
- Gdk.CURRENT_TIME);
- if (status != Gdk.GrabStatus.SUCCESS)
- warning("Grab pointer failed! status = %d", status);
+ } else {
+ // Grab all pointer events
+ status = pointer.grab(get_window(),
+ Gdk.GrabOwnership.NONE,
+ true,
+ Gdk.EventMask.BUTTON_PRESS_MASK |
+ Gdk.EventMask.BUTTON_RELEASE_MASK,
+ null,
+ Gdk.CURRENT_TIME);
+ if (status != Gdk.GrabStatus.SUCCESS)
+ warning("Grab pointer failed! status = %d", status);
+ }
#endif
- // Probably we can delete m_popup_delay_time in 1.6
- pointer.get_position_double(null,
- out m_mouse_init_x,
- out m_mouse_init_y);
- m_mouse_moved = false;
+ /* Fix RHBZ #1771238 assert(m_loop == null)
+ * Grabbing keyboard can be failed when the second Super-e is typed
+ * before Switcher dialog is focused. And m_loop could not be released
+ * if the failed Super-e would call m_loop.run() below and could not
+ * call key_release_event(). And m_loop == null would be false in the
+ * third Super-e.
+ */
+ if (status == Gdk.GrabStatus.SUCCESS) {
+ // Probably we can delete m_popup_delay_time in 1.6
+ pointer.get_position_double(null,
+ out m_mouse_init_x,
+ out m_mouse_init_y);
+ m_mouse_moved = false;
- m_loop = new GLib.MainLoop();
- m_loop.run();
- m_loop = null;
+ m_loop = new GLib.MainLoop();
+ m_loop.run();
+ m_loop = null;
+ }
#if VALA_0_34
seat.ungrab();
--
2.24.1