_dbus_close (int        fd,
             DBusError *error)
{
  _DBUS_ASSERT_ERROR_IS_CLEAR (error);

 again:
  if (close (fd) < 0)
    {
      if (errno == EINTR)
        goto again;

      dbus_set_error (error, _dbus_error_from_errno (errno),
                      "Could not close fd %d", fd);
      return FALSE;
    }

  return TRUE;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.