DeliverEvents(WindowPtr pWin, xEvent *xE, int count, WindowPtr otherParent)
{
    DeviceIntRec dummy;
    int deliveries;

#ifdef PANORAMIX
    if (!noPanoramiXExtension && pWin->drawable.pScreen->myNum)
        return count;
#endif

    if (!count)
        return 0;

    dummy.id = XIAllDevices;

    switch (xE->u.u.type) {
    case DestroyNotify:
    case UnmapNotify:
    case MapNotify:
    case MapRequest:
    case ReparentNotify:
    case ConfigureNotify:
    case ConfigureRequest:
    case GravityNotify:
    case CirculateNotify:
    case CirculateRequest:
        xE->u.destroyNotify.event = pWin->drawable.id;
        break;
    }

    switch (xE->u.u.type) {
    case DestroyNotify:
    case UnmapNotify:
    case MapNotify:
    case ReparentNotify:
    case ConfigureNotify:
    case GravityNotify:
    case CirculateNotify:
        break;
    default:
    {
        Mask filter;

        filter = GetEventFilter(&dummy, xE);
        return DeliverEventsToWindow(&dummy, pWin, xE, count, filter, NullGrab);
    }
    }

    deliveries = DeliverEventsToWindow(&dummy, pWin, xE, count,
                                       StructureNotifyMask, NullGrab);
    if (pWin->parent) {
        xE->u.destroyNotify.event = pWin->parent->drawable.id;
        deliveries += DeliverEventsToWindow(&dummy, pWin->parent, xE, count,
                                            SubstructureNotifyMask, NullGrab);
        if (xE->u.u.type == ReparentNotify) {
            xE->u.destroyNotify.event = otherParent->drawable.id;
            deliveries += DeliverEventsToWindow(&dummy,
                                                otherParent, xE, count,
                                                SubstructureNotifyMask,
                                                NullGrab);
        }
    }
    return deliveries;
}

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.