static void stellaris_enet_unrealize(DeviceState *dev, Error **errp)
{
    stellaris_enet_state *s = STELLARIS_ENET(dev);

    unregister_savevm(DEVICE(s), "stellaris_enet", s);

    memory_region_destroy(&s->mmio);
}
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.