 bool PasswordAutofillAgent::TryToShowTouchToFill(
     const WebFormControlElement& control_element) {
   const WebInputElement* element = ToWebInputElement(&control_element);
  WebInputElement username_element;
  WebInputElement password_element;
  PasswordInfo* password_info = nullptr;
  if (!element ||
      !FindPasswordInfoForElement(*element, &username_element,
                                  &password_element, &password_info)) {
     return false;
   }
   if (was_touch_to_fill_ui_shown_)
    return false;
  was_touch_to_fill_ui_shown_ = true;

  GetPasswordManagerDriver()->ShowTouchToFill();
  return true;
}

The product reads data past the end, or before the beginning, of the intended buffer.