@@ -610,4 +610,56 @@ TEST_F_FORK(socket, ruleset_expanding) {
 	ASSERT_EQ(0, close(sockfd_1));
 }

+TEST_F_FORK(socket, inval) {
+
+	struct landlock_ruleset_attr ruleset_attr = {
+		.handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP
+	};
+	struct landlock_net_service_attr net_service_1 = {
+		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP |
+				  LANDLOCK_ACCESS_NET_CONNECT_TCP,
+		.port = port[0],
+	};
+	struct landlock_net_service_attr net_service_2 = {
+		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP,
+		.port = 0,
+	};
+	struct landlock_net_service_attr net_service_3 = {
+		.allowed_access = 0,
+		.port = port[1],
+	};
+	struct landlock_net_service_attr net_service_4 = {
+		.allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP,
+		.port = port[2],
+	};
+
+	/* Gets ruleset. */
+	const int ruleset_fd = landlock_create_ruleset(&ruleset_attr,
+			sizeof(ruleset_attr), 0);
+	ASSERT_LE(0, ruleset_fd);
+
+	/* Checks unhandled allowed_access. */
+	ASSERT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
+					&net_service_1, 0));
+	ASSERT_EQ(EINVAL, errno);
+
+	/* Checks zero port value. */
+	ASSERT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
+					&net_service_2, 0));
+	ASSERT_EQ(ENOENT, errno);
+
+	/* Checks zero access value. */
+	ASSERT_EQ(-1, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
+					&net_service_3, 0));
+	ASSERT_EQ(ENOMSG, errno);
+
+	/* Adds with legitimate values. */
+	ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE,
+					&net_service_4, 0));
+
+	/* Enforces the ruleset. */
+	enforce_ruleset(_metadata, ruleset_fd);
+	ASSERT_EQ(0, close(ruleset_fd));
+}
+
 TEST_HARNESS_MAIN
--