static bool ldm_parse_dsk4 (const u8 *buffer, int buflen, struct vblk *vb)
{
	int r_objid, r_name, len;
	struct vblk_disk *disk;

	BUG_ON (!buffer || !vb);

	r_objid = ldm_relative (buffer, buflen, 0x18, 0);
	r_name  = ldm_relative (buffer, buflen, 0x18, r_objid);
	len     = r_name;
	if (len < 0)
		return false;

	len += VBLK_SIZE_DSK4;
	if (len != get_unaligned_be32(buffer + 0x14))
		return false;

	disk = &vb->vblk.disk;
	memcpy (disk->disk_id, buffer + 0x18 + r_name, GUID_SIZE);
	return true;
}

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.