Merge pull request #84872 from alesliehughes/res_import_scene

Fix Resource Importer use after free

editor/import/resource_importer_scene.cpp

@@ -2004,7 +2004,7 @@ Array ResourceImporterScene::_get_skinned_pose_transforms(ImporterMeshInstance3D
 	return skin_pose_transform_array;
 }
 
-void ResourceImporterScene::_generate_meshes(Node *p_node, const Dictionary &p_mesh_data, bool p_generate_lods, bool p_create_shadow_meshes, LightBakeMode p_light_bake_mode, float p_lightmap_texel_size, const Vector<uint8_t> &p_src_lightmap_cache, Vector<Vector<uint8_t>> &r_lightmap_caches) {
+Node *ResourceImporterScene::_generate_meshes(Node *p_node, const Dictionary &p_mesh_data, bool p_generate_lods, bool p_create_shadow_meshes, LightBakeMode p_light_bake_mode, float p_lightmap_texel_size, const Vector<uint8_t> &p_src_lightmap_cache, Vector<Vector<uint8_t>> &r_lightmap_caches) {
 	ImporterMeshInstance3D *src_mesh_node = Object::cast_to<ImporterMeshInstance3D>(p_node);
 	if (src_mesh_node) {
 		//is mesh
@@ -2185,6 +2185,8 @@ void ResourceImporterScene::_generate_meshes(Node *p_node, const Dictionary &p_m
 	for (int i = 0; i < p_node->get_child_count(); i++) {
 		_generate_meshes(p_node->get_child(i), p_mesh_data, p_generate_lods, p_create_shadow_meshes, p_light_bake_mode, p_lightmap_texel_size, p_src_lightmap_cache, r_lightmap_caches);
 	}
+
+	return p_node;
 }
 
 void ResourceImporterScene::_add_shapes(Node *p_node, const Vector<Ref<Shape3D>> &p_shapes) {
@@ -2564,7 +2566,7 @@ Error ResourceImporterScene::import(const String &p_source_file, const String &p
 	if (subresources.has("meshes")) {
 		mesh_data = subresources["meshes"];
 	}
-	_generate_meshes(scene, mesh_data, gen_lods, create_shadow_meshes, LightBakeMode(light_bake_mode), lightmap_texel_size, src_lightmap_cache, mesh_lightmap_caches);
+	scene = _generate_meshes(scene, mesh_data, gen_lods, create_shadow_meshes, LightBakeMode(light_bake_mode), lightmap_texel_size, src_lightmap_cache, mesh_lightmap_caches);
 
 	if (mesh_lightmap_caches.size()) {
 		Ref<FileAccess> f = FileAccess::open(p_source_file + ".unwrap_cache", FileAccess::WRITE);

editor/import/resource_importer_scene.h

@@ -216,7 +216,7 @@ class ResourceImporterScene : public ResourceImporter {
 
 	Array _get_skinned_pose_transforms(ImporterMeshInstance3D *p_src_mesh_node);
 	void _replace_owner(Node *p_node, Node *p_scene, Node *p_new_owner);
-	void _generate_meshes(Node *p_node, const Dictionary &p_mesh_data, bool p_generate_lods, bool p_create_shadow_meshes, LightBakeMode p_light_bake_mode, float p_lightmap_texel_size, const Vector<uint8_t> &p_src_lightmap_cache, Vector<Vector<uint8_t>> &r_lightmap_caches);
+	Node *_generate_meshes(Node *p_node, const Dictionary &p_mesh_data, bool p_generate_lods, bool p_create_shadow_meshes, LightBakeMode p_light_bake_mode, float p_lightmap_texel_size, const Vector<uint8_t> &p_src_lightmap_cache, Vector<Vector<uint8_t>> &r_lightmap_caches);
 	void _add_shapes(Node *p_node, const Vector<Ref<Shape3D>> &p_shapes);
 
 	enum AnimationImportTracks {