DeliverFocusedEvent(DeviceIntPtr keybd, InternalEvent *event, WindowPtr window)
{
    DeviceIntPtr ptr;
    WindowPtr focus = keybd->focus->win;
    BOOL sendCore = (IsMaster(keybd) && keybd->coreEvents);
    xEvent *core = NULL, *xE = NULL, *xi2 = NULL;
    int count, rc;
    int deliveries = 0;

    if (focus == FollowKeyboardWin)
        focus = inputInfo.keyboard->focus->win;
    if (!focus)
        return;
    if (focus == PointerRootWin) {
        DeliverDeviceEvents(window, event, NullGrab, NullWindow, keybd);
        return;
    }
    if ((focus == window) || IsParent(focus, window)) {
        if (DeliverDeviceEvents(window, event, NullGrab, focus, keybd))
            return;
    }

    /* just deliver it to the focus window */
    ptr = GetMaster(keybd, POINTER_OR_FLOAT);

    rc = EventToXI2(event, &xi2);
    if (rc == Success) {
        /* XXX: XACE */
        int filter = GetEventFilter(keybd, xi2);

        FixUpEventFromWindow(ptr->spriteInfo->sprite, xi2, focus, None, FALSE);
        deliveries = DeliverEventsToWindow(keybd, focus, xi2, 1,
                                           filter, NullGrab);
        if (deliveries > 0)
            goto unwind;
    }
    else if (rc != BadMatch)
        ErrorF
            ("[dix] %s: XI2 conversion failed in DFE (%d, %d). Skipping delivery.\n",
             keybd->name, event->any.type, rc);

    rc = EventToXI(event, &xE, &count);
    if (rc == Success &&
        XaceHook(XACE_SEND_ACCESS, NULL, keybd, focus, xE, count) == Success) {
        FixUpEventFromWindow(ptr->spriteInfo->sprite, xE, focus, None, FALSE);
        deliveries = DeliverEventsToWindow(keybd, focus, xE, count,
                                           GetEventFilter(keybd, xE), NullGrab);

        if (deliveries > 0)
            goto unwind;
    }
    else if (rc != BadMatch)
        ErrorF
            ("[dix] %s: XI conversion failed in DFE (%d, %d). Skipping delivery.\n",
             keybd->name, event->any.type, rc);

    if (sendCore) {
        rc = EventToCore(event, &core, &count);
        if (rc == Success) {
            if (XaceHook(XACE_SEND_ACCESS, NULL, keybd, focus, core, count) ==
                Success) {
                FixUpEventFromWindow(keybd->spriteInfo->sprite, core, focus,
                                     None, FALSE);
                deliveries =
                    DeliverEventsToWindow(keybd, focus, core, count,
                                          GetEventFilter(keybd, core),
                                          NullGrab);
            }
        }
        else if (rc != BadMatch)
            ErrorF
                ("[dix] %s: core conversion failed DFE (%d, %d). Skipping delivery.\n",
                 keybd->name, event->any.type, rc);
    }

 unwind:
    free(core);
    free(xE);
    free(xi2);
    return;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.