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xwayland/xwm: dissociate even if surface is NULL
If a window is unmapped too quickly, we might receive UnmapNotify before we get the corresponding wl_surface, which will later lead to associating the same window twice. To fix this, move the NULL surface check to xwayland_surface_dissociate(), which makes resetting the unpaired link and the wl_surface object ID unconditional. Fixes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3552
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1 changed files with 9 additions and 10 deletions
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@ -393,22 +393,23 @@ static void xwayland_surface_set_mapped(struct wlr_xwayland_surface *xsurface, b
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static void xwayland_surface_dissociate(struct wlr_xwayland_surface *xsurface) {
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xwayland_surface_set_mapped(xsurface, false);
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if (xsurface->surface != NULL) {
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wl_list_remove(&xsurface->surface_commit.link);
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wl_list_remove(&xsurface->surface_precommit.link);
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wlr_addon_finish(&xsurface->surface_addon);
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xsurface->surface = NULL;
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}
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// Make sure we're not on the unpaired surface list or we
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// could be assigned a surface during surface creation that
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// was mapped before this unmap request.
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wl_list_remove(&xsurface->unpaired_link);
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wl_list_init(&xsurface->unpaired_link);
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wl_list_remove(&xsurface->surface_commit.link);
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wl_list_remove(&xsurface->surface_precommit.link);
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wlr_addon_finish(&xsurface->surface_addon);
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xsurface->surface_id = 0;
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xsurface->surface = NULL;
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}
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static void xwayland_surface_destroy(struct wlr_xwayland_surface *xsurface) {
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if (xsurface->surface != NULL) {
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xwayland_surface_dissociate(xsurface);
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}
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xwayland_surface_dissociate(xsurface);
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wl_signal_emit_mutable(&xsurface->events.destroy, xsurface);
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@ -1087,9 +1088,7 @@ static void xwm_handle_unmap_notify(struct wlr_xwm *xwm,
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return;
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}
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if (xsurface->surface != NULL) {
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xwayland_surface_dissociate(xsurface);
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}
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xwayland_surface_dissociate(xsurface);
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xsurface_set_wm_state(xsurface, XCB_ICCCM_WM_STATE_WITHDRAWN);
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}
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