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wayland/xdg-shell: Add parent window validation in get_popup()

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Like in most similar places we can not assume to get a valid window
when calling `meta_wayland_surface_get_window` as it e.g. might be
unmapped already.

Calling `get_popup` on an unmapped window is a client bug, thus post
a protocol error when this happens.

Closes https://gitlab.gnome.org/GNOME/mutter/-/issues/1174
Closes https://gitlab.gnome.org/GNOME/mutter/-/issues/1293
This commit is contained in:
Robert Mader 2020-08-16 22:54:23 +02:00
parent 59f0aef438
commit 034c6ab9db
1 changed files with 9 additions and 2 deletions
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11
src/wayland/meta-wayland-xdg-shell.c
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@ -1872,6 +1872,15 @@ xdg_surface_constructor_get_popup (struct wl_client *client,
return;
}
parent_window = meta_wayland_surface_get_window (parent_surface);
if (!parent_window)
{
wl_resource_post_error (xdg_wm_base_resource,
XDG_WM_BASE_ERROR_INVALID_POPUP_PARENT,
"Invalid popup parent window");
return;
}
xdg_popup = META_WAYLAND_XDG_POPUP (surface->role);
xdg_popup->resource = wl_resource_create (client,
@ -1886,8 +1895,6 @@ xdg_surface_constructor_get_popup (struct wl_client *client,
xdg_surface = META_WAYLAND_XDG_SURFACE (xdg_popup);
meta_wayland_xdg_surface_constructor_finalize (constructor, xdg_surface);
parent_window = meta_wayland_surface_get_window (parent_surface);
xdg_positioner = wl_resource_get_user_data (positioner_resource);
xdg_popup->setup.placement_rule =
meta_wayland_xdg_positioner_to_placement (xdg_positioner, parent_window);