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libweston: Make weston_seat release safe

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Ensure the server can safely handle client requests for wl_seat resource
that have become inert due to weston_seat object release and subsequent
destruction.

The clean-up involves, among other things, unsetting the destroyed
weston_seat object from the user data of wl_seat resources, and handling
this NULL user data case where required.

The list of sites extracting and using weston_seat object from wl_seat
resources which were audited for this patch are:

Legend:
N/A = Not Applicable (not implemented by weston)
FIXED = Fixed in the commit
OK = Already works correctly

== keyboard_shortcuts_inhibit_unstable_v1 ==
[N/A] zwp_keyboard_shortcuts_inhibit_manager_v1.inhibit_shortcuts
== tablet_input_unstable_v{1,2} ==
[N/A] zwp_tablet_manager_v{1,2}.get_tablet_seat
== text_input_unstable_v1 ==
[FIXED] zwp_text_input_v1.activate
[FIXED] zwp_text_input_v1.deactivate
== wl_data_device ==
[FIXED] wl_data_device_manager.get_data_device
[OK] wl_data_device.start_drag
[FIXED] wl_data_device.set_selection
[OK] wl_data_device.release
== wl_shell ==
[FIXED] wl_shell_surface.move
[FIXED] wl_shell_surface.resize
[FIXED] wl_shell_surface.set_popup
== xdg_shell and xdg_shell_unstable_v6 ==
[FIXED] xdg_toplevel.show_window_menu
[FIXED] xdg_toplevel.move
[FIXED] xdg_toplevel.resize
[FIXED] xdg_popup.grab
== xdg_shell_unstable_v5 ==
[FIXED] xdg_shell.get_xdg_popup
[FIXED] xdg_surface.show_window_menu
[FIXED] xdg_surface.move
[FIXED] xdg_surface.resize

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
This commit is contained in:
Alexandros Frantzis
2018-02-15 13:07:09 +02:00
committed by Pekka Paalanen
parent 1c3a40edcd
commit 8480d13f6d
6 changed files with 102 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files
compositor/text-backend.c
+6 -2
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@@ -193,10 +193,14 @@ text_input_activate(struct wl_client *client,
{
struct text_input *text_input = wl_resource_get_user_data(resource);
struct weston_seat *weston_seat = wl_resource_get_user_data(seat);
struct input_method *input_method = weston_seat->input_method;
struct input_method *input_method;
struct weston_compositor *ec = text_input->ec;
struct text_input *current;
if (!weston_seat)
return;
input_method = weston_seat->input_method;
if (input_method->input == text_input)
return;
@@ -237,7 +241,7 @@ text_input_deactivate(struct wl_client *client,
{
struct weston_seat *weston_seat = wl_resource_get_user_data(seat);
if (weston_seat->input_method->input)
if (weston_seat && weston_seat->input_method->input)
deactivate_input_method(weston_seat->input_method);
}