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173 lines
6.6 KiB
Diff
173 lines
6.6 KiB
Diff
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Fix CVE-2018-14424:
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https://gitlab.gnome.org/GNOME/gdm/issues/401
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14424
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Patch copied from upstream source repository:
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https://gitlab.gnome.org/GNOME/gdm/commit/1ac1697b3b019f50729a6e992065959586e170da
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From 1ac1697b3b019f50729a6e992065959586e170da Mon Sep 17 00:00:00 2001
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From: Chris Coulson <chris.coulson@canonical.com>
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Date: Thu, 19 Jul 2018 18:26:05 +0100
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Subject: [PATCH] display-store: Pass the display object rather than the id in
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the removed signal
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By the time GdmDisplayStore emits the "display-removed" signal, the display
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is no longer in the store and gdm_display_store_lookup will not work in
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signal handlers.
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Change the "display-removed" parameter from the display id to the GdmDisplay
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object, so that signal handers can perform any cleanup they need to do
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CVE-2018-14424
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Closes: https://gitlab.gnome.org/GNOME/gdm/issues/401
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---
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daemon/gdm-display-store.c | 11 +++--------
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daemon/gdm-display-store.h | 2 +-
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daemon/gdm-local-display-factory.c | 13 +++----------
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daemon/gdm-manager.c | 19 +++++++++----------
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daemon/gdm-manager.h | 3 ++-
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5 files changed, 18 insertions(+), 30 deletions(-)
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diff --git a/daemon/gdm-display-store.c b/daemon/gdm-display-store.c
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index af76f519..fd24334e 100644
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--- a/daemon/gdm-display-store.c
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+++ b/daemon/gdm-display-store.c
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@@ -76,15 +76,10 @@ stored_display_new (GdmDisplayStore *store,
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static void
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stored_display_free (StoredDisplay *stored_display)
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{
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- char *id;
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-
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- gdm_display_get_id (stored_display->display, &id, NULL);
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-
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g_signal_emit (G_OBJECT (stored_display->store),
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signals[DISPLAY_REMOVED],
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0,
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- id);
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- g_free (id);
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+ stored_display->display);
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g_debug ("GdmDisplayStore: Unreffing display: %p",
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stored_display->display);
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@@ -281,9 +276,9 @@ gdm_display_store_class_init (GdmDisplayStoreClass *klass)
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G_STRUCT_OFFSET (GdmDisplayStoreClass, display_removed),
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NULL,
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NULL,
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- g_cclosure_marshal_VOID__STRING,
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+ g_cclosure_marshal_VOID__OBJECT,
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G_TYPE_NONE,
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- 1, G_TYPE_STRING);
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+ 1, G_TYPE_OBJECT);
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g_type_class_add_private (klass, sizeof (GdmDisplayStorePrivate));
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}
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diff --git a/daemon/gdm-display-store.h b/daemon/gdm-display-store.h
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index 28359933..0aff8ee2 100644
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--- a/daemon/gdm-display-store.h
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+++ b/daemon/gdm-display-store.h
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@@ -49,7 +49,7 @@ typedef struct
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void (* display_added) (GdmDisplayStore *display_store,
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const char *id);
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void (* display_removed) (GdmDisplayStore *display_store,
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- const char *id);
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+ GdmDisplay *display);
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} GdmDisplayStoreClass;
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typedef enum
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diff --git a/daemon/gdm-local-display-factory.c b/daemon/gdm-local-display-factory.c
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index 5f1ae89e..39f3e30a 100644
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--- a/daemon/gdm-local-display-factory.c
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+++ b/daemon/gdm-local-display-factory.c
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@@ -805,18 +805,11 @@ on_display_added (GdmDisplayStore *display_store,
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static void
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on_display_removed (GdmDisplayStore *display_store,
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- const char *id,
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+ GdmDisplay *display,
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GdmLocalDisplayFactory *factory)
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{
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- GdmDisplay *display;
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-
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- display = gdm_display_store_lookup (display_store, id);
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-
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- if (display != NULL) {
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- g_signal_handlers_disconnect_by_func (display, G_CALLBACK (on_display_status_changed), factory);
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- g_object_weak_unref (G_OBJECT (display), (GWeakNotify)on_display_disposed, factory);
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-
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- }
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+ g_signal_handlers_disconnect_by_func (display, G_CALLBACK (on_display_status_changed), factory);
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+ g_object_weak_unref (G_OBJECT (display), (GWeakNotify)on_display_disposed, factory);
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}
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static gboolean
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diff --git a/daemon/gdm-manager.c b/daemon/gdm-manager.c
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index f17bd1a5..f6684a8b 100644
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--- a/daemon/gdm-manager.c
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+++ b/daemon/gdm-manager.c
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@@ -1541,19 +1541,18 @@ on_display_status_changed (GdmDisplay *display,
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static void
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on_display_removed (GdmDisplayStore *display_store,
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- const char *id,
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+ GdmDisplay *display,
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GdmManager *manager)
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{
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- GdmDisplay *display;
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+ char *id;
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- display = gdm_display_store_lookup (display_store, id);
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- if (display != NULL) {
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- g_dbus_object_manager_server_unexport (manager->priv->object_manager, id);
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+ gdm_display_get_id (display, &id, NULL);
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+ g_dbus_object_manager_server_unexport (manager->priv->object_manager, id);
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+ g_free (id);
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- g_signal_handlers_disconnect_by_func (display, G_CALLBACK (on_display_status_changed), manager);
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+ g_signal_handlers_disconnect_by_func (display, G_CALLBACK (on_display_status_changed), manager);
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- g_signal_emit (manager, signals[DISPLAY_REMOVED], 0, id);
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- }
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+ g_signal_emit (manager, signals[DISPLAY_REMOVED], 0, display);
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}
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static void
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@@ -2535,9 +2534,9 @@ gdm_manager_class_init (GdmManagerClass *klass)
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G_STRUCT_OFFSET (GdmManagerClass, display_removed),
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NULL,
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NULL,
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- g_cclosure_marshal_VOID__STRING,
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+ g_cclosure_marshal_VOID__OBJECT,
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G_TYPE_NONE,
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- 1, G_TYPE_STRING);
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+ 1, G_TYPE_OBJECT);
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g_object_class_install_property (object_class,
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PROP_XDMCP_ENABLED,
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diff --git a/daemon/gdm-manager.h b/daemon/gdm-manager.h
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index 41c68a7a..c8fb3f22 100644
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--- a/daemon/gdm-manager.h
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+++ b/daemon/gdm-manager.h
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@@ -24,6 +24,7 @@
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#include <glib-object.h>
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+#include "gdm-display.h"
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#include "gdm-manager-glue.h"
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G_BEGIN_DECLS
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@@ -50,7 +51,7 @@ typedef struct
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void (* display_added) (GdmManager *manager,
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const char *id);
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void (* display_removed) (GdmManager *manager,
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- const char *id);
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+ GdmDisplay *display);
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} GdmManagerClass;
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typedef enum
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--
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2.17.1
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