int cipso_v4_doi_add(struct cipso_v4_doi *doi_def,
		     struct netlbl_audit *audit_info)
{
	int ret_val = -EINVAL;
	u32 iter;
	u32 doi;
	u32 doi_type;
	struct audit_buffer *audit_buf;

	doi = doi_def->doi;
	doi_type = doi_def->type;

	if (doi_def->doi == CIPSO_V4_DOI_UNKNOWN)
		goto doi_add_return;
	for (iter = 0; iter < CIPSO_V4_TAG_MAXCNT; iter++) {
		switch (doi_def->tags[iter]) {
		case CIPSO_V4_TAG_RBITMAP:
			break;
		case CIPSO_V4_TAG_RANGE:
		case CIPSO_V4_TAG_ENUM:
			if (doi_def->type != CIPSO_V4_MAP_PASS)
				goto doi_add_return;
			break;
		case CIPSO_V4_TAG_LOCAL:
			if (doi_def->type != CIPSO_V4_MAP_LOCAL)
				goto doi_add_return;
			break;
		case CIPSO_V4_TAG_INVALID:
			if (iter == 0)
				goto doi_add_return;
			break;
		default:
			goto doi_add_return;
		}
	}

	atomic_set(&doi_def->refcount, 1);

	spin_lock(&cipso_v4_doi_list_lock);
	if (cipso_v4_doi_search(doi_def->doi) != NULL) {
		spin_unlock(&cipso_v4_doi_list_lock);
		ret_val = -EEXIST;
		goto doi_add_return;
	}
	list_add_tail_rcu(&doi_def->list, &cipso_v4_doi_list);
	spin_unlock(&cipso_v4_doi_list_lock);
	ret_val = 0;

doi_add_return:
	audit_buf = netlbl_audit_start(AUDIT_MAC_CIPSOV4_ADD, audit_info);
	if (audit_buf != NULL) {
		const char *type_str;
		switch (doi_type) {
		case CIPSO_V4_MAP_TRANS:
			type_str = "trans";
			break;
		case CIPSO_V4_MAP_PASS:
			type_str = "pass";
			break;
		case CIPSO_V4_MAP_LOCAL:
			type_str = "local";
			break;
		default:
			type_str = "(unknown)";
		}
		audit_log_format(audit_buf,
				 " cipso_doi=%u cipso_type=%s res=%u",
				 doi, type_str, ret_val == 0 ? 1 : 0);
		audit_log_end(audit_buf);
	}

	return ret_val;
}

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.