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scene: ensure node cannot be reparented below itself
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@ -138,6 +138,13 @@ void wlr_scene_node_reparent(struct wlr_scene_node *node,
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if (node->parent == new_parent) {
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return;
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}
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/* Ensure that a node cannot become its own ancestor */
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for (struct wlr_scene_node *ancestor = new_parent; ancestor != NULL;
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ancestor = ancestor->parent) {
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if (ancestor == node) {
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return;
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}
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}
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wl_list_remove(&node->state.link);
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