static bool ldm_parse_vol5(const u8 *buffer, int buflen, struct vblk *vb)
{
	int r_objid, r_name, r_vtype, r_disable_drive_letter, r_child, r_size;
	int r_id1, r_id2, r_size2, r_drive, len;
	struct vblk_volu *volu;

	BUG_ON(!buffer || !vb);
	r_objid = ldm_relative(buffer, buflen, 0x18, 0);
	if (r_objid < 0) {
		ldm_error("r_objid %d < 0", r_objid);
		return false;
	}
	r_name = ldm_relative(buffer, buflen, 0x18, r_objid);
	if (r_name < 0) {
		ldm_error("r_name %d < 0", r_name);
		return false;
	}
	r_vtype = ldm_relative(buffer, buflen, 0x18, r_name);
	if (r_vtype < 0) {
		ldm_error("r_vtype %d < 0", r_vtype);
		return false;
	}
	r_disable_drive_letter = ldm_relative(buffer, buflen, 0x18, r_vtype);
	if (r_disable_drive_letter < 0) {
		ldm_error("r_disable_drive_letter %d < 0",
				r_disable_drive_letter);
		return false;
	}
	r_child = ldm_relative(buffer, buflen, 0x2D, r_disable_drive_letter);
	if (r_child < 0) {
		ldm_error("r_child %d < 0", r_child);
		return false;
	}
	r_size = ldm_relative(buffer, buflen, 0x3D, r_child);
	if (r_size < 0) {
		ldm_error("r_size %d < 0", r_size);
		return false;
	}
	if (buffer[0x12] & VBLK_FLAG_VOLU_ID1) {
		r_id1 = ldm_relative(buffer, buflen, 0x52, r_size);
		if (r_id1 < 0) {
			ldm_error("r_id1 %d < 0", r_id1);
			return false;
		}
	} else
		r_id1 = r_size;
	if (buffer[0x12] & VBLK_FLAG_VOLU_ID2) {
		r_id2 = ldm_relative(buffer, buflen, 0x52, r_id1);
		if (r_id2 < 0) {
			ldm_error("r_id2 %d < 0", r_id2);
			return false;
		}
	} else
		r_id2 = r_id1;
	if (buffer[0x12] & VBLK_FLAG_VOLU_SIZE) {
		r_size2 = ldm_relative(buffer, buflen, 0x52, r_id2);
		if (r_size2 < 0) {
			ldm_error("r_size2 %d < 0", r_size2);
			return false;
		}
	} else
		r_size2 = r_id2;
	if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
		r_drive = ldm_relative(buffer, buflen, 0x52, r_size2);
		if (r_drive < 0) {
			ldm_error("r_drive %d < 0", r_drive);
			return false;
		}
	} else
		r_drive = r_size2;
	len = r_drive;
	if (len < 0) {
		ldm_error("len %d < 0", len);
		return false;
	}
	len += VBLK_SIZE_VOL5;
	if (len > get_unaligned_be32(buffer + 0x14)) {
		ldm_error("len %d > BE32(buffer + 0x14) %d", len,
				get_unaligned_be32(buffer + 0x14));
		return false;
	}
	volu = &vb->vblk.volu;
	ldm_get_vstr(buffer + 0x18 + r_name, volu->volume_type,
			sizeof(volu->volume_type));
	memcpy(volu->volume_state, buffer + 0x18 + r_disable_drive_letter,
			sizeof(volu->volume_state));
	volu->size = ldm_get_vnum(buffer + 0x3D + r_child);
	volu->partition_type = buffer[0x41 + r_size];
	memcpy(volu->guid, buffer + 0x42 + r_size, sizeof(volu->guid));
	if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
		ldm_get_vstr(buffer + 0x52 + r_size, volu->drive_hint,
				sizeof(volu->drive_hint));
	}
	return true;
}
static bool ldm_parse_vol5(const u8 *buffer, int buflen, struct vblk *vb)
{
	int r_objid, r_name, r_vtype, r_disable_drive_letter, r_child, r_size;
	int r_id1, r_id2, r_size2, r_drive, len;
	struct vblk_volu *volu;

	BUG_ON(!buffer || !vb);
	r_objid = ldm_relative(buffer, buflen, 0x18, 0);
	if (r_objid < 0) {
		ldm_error("r_objid %d < 0", r_objid);
		return false;
	}
	r_name = ldm_relative(buffer, buflen, 0x18, r_objid);
	if (r_name < 0) {
		ldm_error("r_name %d < 0", r_name);
		return false;
	}
	r_vtype = ldm_relative(buffer, buflen, 0x18, r_name);
	if (r_vtype < 0) {
		ldm_error("r_vtype %d < 0", r_vtype);
		return false;
	}
	r_disable_drive_letter = ldm_relative(buffer, buflen, 0x18, r_vtype);
	if (r_disable_drive_letter < 0) {
		ldm_error("r_disable_drive_letter %d < 0",
				r_disable_drive_letter);
		return false;
	}
	r_child = ldm_relative(buffer, buflen, 0x2D, r_disable_drive_letter);
	if (r_child < 0) {
		ldm_error("r_child %d < 0", r_child);
		return false;
	}
	r_size = ldm_relative(buffer, buflen, 0x3D, r_child);
	if (r_size < 0) {
		ldm_error("r_size %d < 0", r_size);
		return false;
	}
	if (buffer[0x12] & VBLK_FLAG_VOLU_ID1) {
		r_id1 = ldm_relative(buffer, buflen, 0x52, r_size);
		if (r_id1 < 0) {
			ldm_error("r_id1 %d < 0", r_id1);
			return false;
		}
	} else
		r_id1 = r_size;
	if (buffer[0x12] & VBLK_FLAG_VOLU_ID2) {
		r_id2 = ldm_relative(buffer, buflen, 0x52, r_id1);
		if (r_id2 < 0) {
			ldm_error("r_id2 %d < 0", r_id2);
			return false;
		}
	} else
		r_id2 = r_id1;
	if (buffer[0x12] & VBLK_FLAG_VOLU_SIZE) {
		r_size2 = ldm_relative(buffer, buflen, 0x52, r_id2);
		if (r_size2 < 0) {
			ldm_error("r_size2 %d < 0", r_size2);
			return false;
		}
	} else
		r_size2 = r_id2;
	if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
		r_drive = ldm_relative(buffer, buflen, 0x52, r_size2);
		if (r_drive < 0) {
			ldm_error("r_drive %d < 0", r_drive);
			return false;
		}
	} else
		r_drive = r_size2;
	len = r_drive;
	if (len < 0) {
		ldm_error("len %d < 0", len);
		return false;
	}
	len += VBLK_SIZE_VOL5;
	if (len > get_unaligned_be32(buffer + 0x14)) {
		ldm_error("len %d > BE32(buffer + 0x14) %d", len,
				get_unaligned_be32(buffer + 0x14));
		return false;
	}
	volu = &vb->vblk.volu;
	ldm_get_vstr(buffer + 0x18 + r_name, volu->volume_type,
			sizeof(volu->volume_type));
	memcpy(volu->volume_state, buffer + 0x18 + r_disable_drive_letter,
			sizeof(volu->volume_state));
	volu->size = ldm_get_vnum(buffer + 0x3D + r_child);
	volu->partition_type = buffer[0x41 + r_size];
	memcpy(volu->guid, buffer + 0x42 + r_size, sizeof(volu->guid));
	if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
		ldm_get_vstr(buffer + 0x52 + r_size, volu->drive_hint,
				sizeof(volu->drive_hint));
	}
	return true;
}