static int set_sig_umr_wr(const struct ib_send_wr *send_wr,
			  struct mlx5_ib_qp *qp, void **seg, int *size)
{
	const struct ib_sig_handover_wr *wr = sig_handover_wr(send_wr);
	struct mlx5_ib_mr *sig_mr = to_mmr(wr->sig_mr);
	u32 pdn = get_pd(qp)->pdn;
	u32 xlt_size;
	int region_len, ret;

	if (unlikely(wr->wr.num_sge != 1) ||
	    unlikely(wr->access_flags & IB_ACCESS_REMOTE_ATOMIC) ||
	    unlikely(!sig_mr->sig) || unlikely(!qp->signature_en) ||
	    unlikely(!sig_mr->sig->sig_status_checked))
		return -EINVAL;

	/* length of the protected region, data + protection */
	region_len = wr->wr.sg_list->length;
	if (wr->prot &&
	    (wr->prot->lkey != wr->wr.sg_list->lkey  ||
	     wr->prot->addr != wr->wr.sg_list->addr  ||
	     wr->prot->length != wr->wr.sg_list->length))
		region_len += wr->prot->length;

	/**
	 * KLM octoword size - if protection was provided
	 * then we use strided block format (3 octowords),
	 * else we use single KLM (1 octoword)
	 **/
	xlt_size = wr->prot ? 0x30 : sizeof(struct mlx5_klm);

	set_sig_umr_segment(*seg, xlt_size);
	*seg += sizeof(struct mlx5_wqe_umr_ctrl_seg);
	*size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16;
	if (unlikely((*seg == qp->sq.qend)))
		*seg = mlx5_get_send_wqe(qp, 0);

	set_sig_mkey_segment(*seg, wr, xlt_size, region_len, pdn);
	*seg += sizeof(struct mlx5_mkey_seg);
	*size += sizeof(struct mlx5_mkey_seg) / 16;
	if (unlikely((*seg == qp->sq.qend)))
		*seg = mlx5_get_send_wqe(qp, 0);

	ret = set_sig_data_segment(wr, qp, seg, size);
	if (ret)
		return ret;

	sig_mr->sig->sig_status_checked = false;
	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.