Fix GH-24715: Lazy ghost reset by a destructor while releasing its initializer

Author: lazerg

NEWS

@@ -30,6 +30,9 @@ PHP                                                                        NEWS
     for grouping. (Klaas Skelte van der Werf)
   . Fixed bug GH-24265 (Unwind/GracefulExit discarded in
     zend_fiber_execute()). (David Carlier)
+  . Fixed bug GH-24715 (Assertion failure in zend_lazy_object_get_properties()
+    when releasing the initializer resets the object as lazy).
+    (Lazizbek Ergashev)
 
 - Date:
   . Fixed bug GH-20503 (Assertion failure with ext/date DateInterval property

Zend/tests/lazy_objects/gh24715.phpt

@@ -0,0 +1,44 @@
+--TEST--
+GH-24715: Object reset as lazy by a destructor triggered when releasing the initializer
+--FILE--
+<?php
+
+class C {
+    public $a;
+}
+
+class D {
+    public $self;
+    public function __construct() {
+        $this->self = $this;
+    }
+    public function __destruct() {
+        global $obj, $reflector;
+        try {
+            $reflector->resetAsLazyGhost($obj, function () {});
+        } catch (Error $e) {
+            printf("%s: %s\n", $e::class, $e->getMessage());
+        }
+    }
+}
+
+new D();
+
+$reflector = new ReflectionClass(C::class);
+$obj = $reflector->newLazyGhost(new class {
+    public function __invoke($obj) {
+        $obj->a = 1;
+    }
+    public function __destruct() {
+        gc_collect_cycles();
+    }
+});
+
+var_dump(serialize($obj));
+var_dump($reflector->isUninitializedLazyObject($obj));
+
+?>
+--EXPECT--
+Error: Can not reset an object while it is being initialized
+string(24) "O:1:"C":1:{s:1:"a";i:1;}"
+bool(false)

Zend/zend_lazy_objects.c

@@ -76,7 +76,9 @@ static void zend_lazy_object_info_dtor_func(zval *pElement)
 		zend_object_release(info->u.instance);
 	} else {
 		zval_ptr_dtor(&info->u.initializer.zv);
-		zend_fcc_dtor(&info->u.initializer.fcc);
+		if (ZEND_FCC_INITIALIZED(info->u.initializer.fcc)) {
+			zend_fcc_dtor(&info->u.initializer.fcc);
+		}
 	}
 
 	efree(info);
@@ -670,6 +672,15 @@ ZEND_API zend_object *zend_lazy_object_init(zend_object *obj)
 		zend_release_properties(properties_snapshot);
 	}
 
+	/* Release the initializer while the info is still registered, so that
+	 * destructors triggered by this can not reset the object */
+	zend_lazy_object_info *info = zend_hash_index_find_ptr(&EG(lazy_objects_store).infos, obj->handle);
+	zval initializer_zv;
+	ZVAL_COPY_VALUE(&initializer_zv, &info->u.initializer.zv);
+	ZVAL_UNDEF(&info->u.initializer.zv);
+	zend_fcc_dtor(&info->u.initializer.fcc);
+	zval_ptr_dtor(&initializer_zv);
+
 	/* Must be very last in this function, for the
 	 * zend_lazy_object_has_stale_info() check */
 	zend_lazy_object_del_info(obj);