struct ib_wq *mlx5_ib_create_wq(struct ib_pd *pd,
				struct ib_wq_init_attr *init_attr,
				struct ib_udata *udata)
{
	struct mlx5_ib_dev *dev;
	struct mlx5_ib_rwq *rwq;
	struct mlx5_ib_create_wq_resp resp = {};
	size_t min_resp_len;
	int err;

	if (!udata)
		return ERR_PTR(-ENOSYS);

	min_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
	if (udata->outlen && udata->outlen < min_resp_len)
		return ERR_PTR(-EINVAL);

	dev = to_mdev(pd->device);
	switch (init_attr->wq_type) {
	case IB_WQT_RQ:
		rwq = kzalloc(sizeof(*rwq), GFP_KERNEL);
		if (!rwq)
			return ERR_PTR(-ENOMEM);
		err = prepare_user_rq(pd, init_attr, udata, rwq);
		if (err)
			goto err;
		err = create_rq(rwq, pd, init_attr);
		if (err)
			goto err_user_rq;
		break;
	default:
		mlx5_ib_dbg(dev, "unsupported wq type %d\n",
			    init_attr->wq_type);
		return ERR_PTR(-EINVAL);
	}

	rwq->ibwq.wq_num = rwq->core_qp.qpn;
	rwq->ibwq.state = IB_WQS_RESET;
	if (udata->outlen) {
		resp.response_length = offsetof(typeof(resp), response_length) +
				sizeof(resp.response_length);
		err = ib_copy_to_udata(udata, &resp, resp.response_length);
		if (err)
			goto err_copy;
	}

	rwq->core_qp.event = mlx5_ib_wq_event;
	rwq->ibwq.event_handler = init_attr->event_handler;
	return &rwq->ibwq;

err_copy:
	mlx5_core_destroy_rq_tracked(dev->mdev, &rwq->core_qp);
err_user_rq:
	destroy_user_rq(dev, pd, rwq);
err:
	kfree(rwq);
	return ERR_PTR(err);
}

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.