static void stellaris_enet_save(QEMUFile *f, void *opaque)
{
    stellaris_enet_state *s = (stellaris_enet_state *)opaque;
    int i;

    qemu_put_be32(f, s->ris);
    qemu_put_be32(f, s->im);
    qemu_put_be32(f, s->rctl);
    qemu_put_be32(f, s->tctl);
    qemu_put_be32(f, s->thr);
    qemu_put_be32(f, s->mctl);
    qemu_put_be32(f, s->mdv);
    qemu_put_be32(f, s->mtxd);
    qemu_put_be32(f, s->mrxd);
    qemu_put_be32(f, s->np);
    qemu_put_be32(f, s->tx_fifo_len);
    qemu_put_buffer(f, s->tx_fifo, sizeof(s->tx_fifo));
    for (i = 0; i < 31; i++) {
        qemu_put_be32(f, s->rx[i].len);
        qemu_put_buffer(f, s->rx[i].data, sizeof(s->rx[i].data));

    }
    qemu_put_be32(f, s->next_packet);
    qemu_put_be32(f, s->rx_fifo_offset);
}
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.