Function try_relabel

freebsd/security/mac_lomac/mac_lomac.c:587–595

* Relabel "to" to "from" only if "from" is a valid label (contains at least * a single), as for a relabel operation which may or may not involve a * relevant label. */

 * relevant label.
 */
static void
try_relabel(struct mac_lomac *from, struct mac_lomac *to)
{

	if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
		bzero(to, sizeof(*to));
		lomac_copy(from, to);
	}
}

/*
 * Policy module operations.