static void iscsi_ioctl_handle_emulated(IscsiAIOCB *acb, int req, void *buf)
{
    BlockDriverState *bs = acb->common.bs;
    IscsiLun *iscsilun = bs->opaque;
    int ret = 0;

    switch (req) {
    case SG_GET_VERSION_NUM:
        *(int *)buf = 30000;
        break;
    case SG_GET_SCSI_ID:
        ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
        break;
    default:
        ret = -EINVAL;
    }
    assert(!acb->bh);
    acb->bh = aio_bh_new(bdrv_get_aio_context(bs),
                         iscsi_ioctl_bh_completion, acb);
    acb->ret = ret;
    qemu_bh_schedule(acb->bh);
}

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.