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src/view.c: Prevent crash by killing a moving application

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When a view is destroyed labwc calls interactive_end(view) which
may reposition the view which is partly destroyed and doesn't own
any surface anymore. To prevent this scenario from happening don't
call interactive_end() at all and just reset server->grabbed_view
and server->input_mode directly.

Before this patch, the bug could be reproduced by:
- xcalc &
- sleep 5; killall xcalc
- move the xcalc window completely to one of the edges

The change in src/xwayland.c is not required for this bug
to be fixed but may prevent something similar in the future.
This commit is contained in:
Consolatis 2022-07-10 23:24:32 +02:00 • committed by Johan Malm
parent 1f0055a7e0
commit f1ba0a89fc
2 changed files with 21 additions and 6 deletions
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23
src/view.c
View file

@ -759,25 +759,36 @@ view_update_app_id(struct view *view)
void
view_destroy(struct view *view)
{
struct server *server = view->server;
if (view->toplevel_handle) {
wlr_foreign_toplevel_handle_v1_destroy(view->toplevel_handle);
}
interactive_end(view);
struct server *server = view->server;
if (server->grabbed_view == view) {
/* Application got killed while moving around */
server->input_mode = LAB_INPUT_STATE_PASSTHROUGH;
server->grabbed_view = NULL;
}
if (server->seat.pressed.view == view) {
/* Mouse was pressed on surface and is still pressed */
server->seat.pressed.view = NULL;
server->seat.pressed.surface = NULL;
}
if (server->cycle_view == view) {
/* If we are the current OSD selected view, cycle
* to the next because we are dying. */
/*
* If we are the current OSD selected view, cycle
* to the next because we are dying.
*/
server->cycle_view = desktop_cycle_view(server,
server->cycle_view, LAB_CYCLE_DIR_BACKWARD);
/* If we cycled back to ourselves, then we have no windows.
* just remove it and close the OSD for good. */
/*
* If we cycled back to ourselves, then we have no windows.
* just remove it and close the OSD for good.
*/
if (server->cycle_view == view || !server->cycle_view) {
server->cycle_view = NULL;
osd_finish(server);

4
src/xwayland.c
View file

@ -209,6 +209,10 @@ handle_set_class(struct wl_listener *listener, void *data)
static void
configure(struct view *view, struct wlr_box geo)
{
if (!view->xwayland_surface) {
wlr_log(WLR_ERROR, "Not configuring view without xwayland_surface");
return;
}
view->pending_move_resize.update_x = geo.x != view->x;
view->pending_move_resize.update_y = geo.y != view->y;
view->pending_move_resize.x = geo.x;