static int cirrus_bitblt_videotocpu(CirrusVGAState * s)
{
    /* XXX */
#ifdef DEBUG_BITBLT
    printf("cirrus: bitblt (video to cpu) is not implemented yet\n");
#endif
    return 0;
}

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.