static void set_reg_mkey_seg(struct mlx5_mkey_seg *seg,
			     struct mlx5_ib_mr *mr,
			     u32 key, int access)
{
	int ndescs = ALIGN(mr->ndescs, 8) >> 1;

	memset(seg, 0, sizeof(*seg));

	if (mr->access_mode == MLX5_MKC_ACCESS_MODE_MTT)
		seg->log2_page_size = ilog2(mr->ibmr.page_size);
	else if (mr->access_mode == MLX5_MKC_ACCESS_MODE_KLMS)
		/* KLMs take twice the size of MTTs */
		ndescs *= 2;

	seg->flags = get_umr_flags(access) | mr->access_mode;
	seg->qpn_mkey7_0 = cpu_to_be32((key & 0xff) | 0xffffff00);
	seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL);
	seg->start_addr = cpu_to_be64(mr->ibmr.iova);
	seg->len = cpu_to_be64(mr->ibmr.length);
	seg->xlt_oct_size = cpu_to_be32(ndescs);
}

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.