static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info *a,
				  const struct tomoyo_acl_info *b)
{
	const struct tomoyo_mount_acl *p1 = container_of(a, typeof(*p1), head);
	const struct tomoyo_mount_acl *p2 = container_of(b, typeof(*p2), head);
	return tomoyo_same_acl_head(&p1->head, &p2->head) &&
		tomoyo_same_name_union(&p1->dev_name, &p2->dev_name) &&
		tomoyo_same_name_union(&p1->dir_name, &p2->dir_name) &&
		tomoyo_same_name_union(&p1->fs_type, &p2->fs_type) &&
		tomoyo_same_number_union(&p1->flags, &p2->flags);
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.