wayland: Ensure to unlink destroy listeners after destruction
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2592#note_1537242
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Kalev Lember
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From 51064c1b4e46be180d4aa9b3fcfd57a6ea7ea615 Mon Sep 17 00:00:00 2001
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From: Carlos Garnacho <carlosg@gnome.org>
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Date: Fri, 19 Aug 2022 17:08:42 +0200
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Subject: [PATCH 1/3] wayland: Ensure to unlink destroy listeners after
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destruction
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This is missed in some wl_listeners added
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through wl_resource_add_destroy_listener(). Ensure this is done consistently
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for all notify functions.
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Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2588>
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---
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src/wayland/meta-wayland-data-device.c | 8 ++++++--
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1 file changed, 6 insertions(+), 2 deletions(-)
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diff --git a/src/wayland/meta-wayland-data-device.c b/src/wayland/meta-wayland-data-device.c
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index c8cf8f5c4b..d6c28ff331 100644
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--- a/src/wayland/meta-wayland-data-device.c
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+++ b/src/wayland/meta-wayland-data-device.c
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@@ -173,11 +173,13 @@ unset_selection_source (MetaWaylandDataDevice *data_device,
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}
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static void
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-destroy_drag_focus (struct wl_listener *listener, void *data)
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+destroy_drag_focus (struct wl_listener *listener,
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+ void *data)
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{
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MetaWaylandDragGrab *grab = wl_container_of (listener, grab, drag_focus_listener);
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grab->drag_focus_data_device = NULL;
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+ wl_list_remove (&grab->drag_focus_listener.link);
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g_clear_signal_handler (&grab->drag_focus_destroy_handler_id,
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grab->drag_focus);
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@@ -560,12 +562,14 @@ drag_grab_data_source_destroyed (gpointer data, GObject *where_the_object_was)
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}
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static void
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-destroy_data_device_icon (struct wl_listener *listener, void *data)
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+destroy_data_device_icon (struct wl_listener *listener,
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+ void *data)
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{
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MetaWaylandDragGrab *drag_grab =
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wl_container_of (listener, drag_grab, drag_icon_listener);
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drag_grab->drag_surface = NULL;
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+ wl_list_remove (&drag_grab->drag_icon_listener.link);
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if (drag_grab->feedback_actor)
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clutter_actor_remove_all_children (drag_grab->feedback_actor);
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--
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GitLab
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From f4f39d3a2cd2de35e1f85e32182a34336d52ae3d Mon Sep 17 00:00:00 2001
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From: Carlos Garnacho <carlosg@gnome.org>
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Date: Fri, 19 Aug 2022 17:10:15 +0200
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Subject: [PATCH 2/3] wayland: Ensure to unlink destroy listeners for
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subsurfaces
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There is some surface tracking going on here, and all notify handlers
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are possibly leaving the linked wl_listener behind. Ensure it is unlinked
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in all destroy notification functions.
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Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2588>
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---
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src/wayland/meta-wayland-subsurface.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/src/wayland/meta-wayland-subsurface.c b/src/wayland/meta-wayland-subsurface.c
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index 3e088b04fb..6a23c86100 100644
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--- a/src/wayland/meta-wayland-subsurface.c
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+++ b/src/wayland/meta-wayland-subsurface.c
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@@ -342,6 +342,7 @@ subsurface_handle_pending_subsurface_destroyed (struct wl_listener *listener,
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wl_container_of (listener, op, subsurface_destroy_listener);
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op->surface = NULL;
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+ wl_list_remove (&op->subsurface_destroy_listener.link);
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}
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static void
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@@ -352,6 +353,7 @@ subsurface_handle_pending_sibling_destroyed (struct wl_listener *listener,
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wl_container_of (listener, op, sibling_destroy_listener);
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op->sibling = NULL;
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+ wl_list_remove (&op->sibling_destroy_listener.link);
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}
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void
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@@ -487,6 +489,7 @@ surface_handle_parent_surface_destroyed (struct wl_listener *listener,
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g_node_unlink (surface->subsurface_branch_node);
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surface->sub.parent = NULL;
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+ wl_list_remove (&surface->sub.parent_destroy_listener.link);
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}
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static gboolean
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--
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GitLab
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From 9c402bd091255e8a21f7e3263559dbe63135dec7 Mon Sep 17 00:00:00 2001
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From: Carlos Garnacho <carlosg@gnome.org>
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Date: Fri, 19 Aug 2022 17:13:01 +0200
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Subject: [PATCH 3/3] wayland: Ensure to remove destroy listener for
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MetaWaylandBuffer
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Avoid the chance of invalid memory access by leaving the wl_listener
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behind when handling the destroy notification.
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Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2588>
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---
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src/wayland/meta-wayland-buffer.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/src/wayland/meta-wayland-buffer.c b/src/wayland/meta-wayland-buffer.c
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index 557952b6fe..7a22f824bc 100644
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--- a/src/wayland/meta-wayland-buffer.c
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+++ b/src/wayland/meta-wayland-buffer.c
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@@ -83,12 +83,13 @@ G_DEFINE_TYPE (MetaWaylandBuffer, meta_wayland_buffer, G_TYPE_OBJECT);
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static void
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meta_wayland_buffer_destroy_handler (struct wl_listener *listener,
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- void *data)
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+ void *data)
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{
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MetaWaylandBuffer *buffer =
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wl_container_of (listener, buffer, destroy_listener);
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buffer->resource = NULL;
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+ wl_list_remove (&buffer->destroy_listener.link);
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g_signal_emit (buffer, signals[RESOURCE_DESTROYED], 0);
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g_object_unref (buffer);
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}
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--
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GitLab
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@ -10,7 +10,7 @@
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Name: mutter
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Version: 43~beta
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Release: 2%{?dist}
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Release: 3%{?dist}
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Summary: Window and compositing manager based on Clutter
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License: GPLv2+
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@ -32,6 +32,10 @@ Patch3: 0001-build-Add-missing-include.patch
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# https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2592
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Patch4: 2592.patch
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# Backported from upstream
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# https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2588
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Patch5: 2588.patch
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BuildRequires: pkgconfig(gobject-introspection-1.0) >= 1.41.0
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BuildRequires: pkgconfig(sm)
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BuildRequires: pkgconfig(libwacom)
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@ -175,6 +179,9 @@ desktop-file-validate %{buildroot}/%{_datadir}/applications/%{name}.desktop
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%{_datadir}/mutter-%{mutter_api_version}/tests
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%changelog
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* Thu Aug 25 2022 Kalev Lember <klember@redhat.com> - 43~beta-3
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- wayland: Ensure to unlink destroy listeners after destruction
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* Wed Aug 24 2022 Kalev Lember <klember@redhat.com> - 43~beta-2
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- Backport upstream patch to fix a compositor crash (#2120470)
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