static zend_object_value spl_filesystem_object_clone(zval *zobject TSRMLS_DC)
{
	zend_object_value new_obj_val;
	zend_object *old_object;
	zend_object *new_object;
	zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
	spl_filesystem_object *intern;
	spl_filesystem_object *source;
	int index, skip_dots;

	old_object = zend_objects_get_address(zobject TSRMLS_CC);
	source = (spl_filesystem_object*)old_object;

	new_obj_val = spl_filesystem_object_new_ex(old_object->ce, &intern TSRMLS_CC);
	new_object = &intern->std;

	intern->flags = source->flags;

	switch (source->type) {
	case SPL_FS_INFO:
		intern->_path_len = source->_path_len;
		intern->_path = estrndup(source->_path, source->_path_len);
		intern->file_name_len = source->file_name_len;
		intern->file_name = estrndup(source->file_name, intern->file_name_len);
		break;
	case SPL_FS_DIR:
		spl_filesystem_dir_open(intern, source->_path TSRMLS_CC);
		/* read until we hit the position in which we were before */
		skip_dots = SPL_HAS_FLAG(source->flags, SPL_FILE_DIR_SKIPDOTS);
		for(index = 0; index < source->u.dir.index; ++index) {
			do {
				spl_filesystem_dir_read(intern TSRMLS_CC);
			} while (skip_dots && spl_filesystem_is_dot(intern->u.dir.entry.d_name));
		}
		intern->u.dir.index = index;
		break;
	case SPL_FS_FILE:
		php_error_docref(NULL TSRMLS_CC, E_ERROR, "An object of class %s cannot be cloned", old_object->ce->name);
		break;
	}

	intern->file_class = source->file_class;
	intern->info_class = source->info_class;
	intern->oth = source->oth;
	intern->oth_handler = source->oth_handler;

	zend_objects_clone_members(new_object, new_obj_val, old_object, handle TSRMLS_CC);

	if (intern->oth_handler && intern->oth_handler->clone) {
		intern->oth_handler->clone(source, intern TSRMLS_CC);
	}

	return new_obj_val;
}
The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.