[RFC PATCH v1 05/10] selftests/landlock: Create 'rule_with_unknown_access' test

[Ivanov Mikhail <ivanov.mikhail1@huawei-partners.com>]

Add test that validates behavior of landlock after rule with
unknown access is added.

Signed-off-by: Ivanov Mikhail <ivanov.mikhail1@huawei-partners.com>
Reviewed-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
---
 .../testing/selftests/landlock/socket_test.c  | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/tools/testing/selftests/landlock/socket_test.c b/tools/testing/selftests/landlock/socket_test.c
index 7f31594bf..5577b08d5 100644
--- a/tools/testing/selftests/landlock/socket_test.c
+++ b/tools/testing/selftests/landlock/socket_test.c
@@ -223,4 +223,30 @@ TEST_F(protocol, socket_access_rights)
 	EXPECT_EQ(0, close(ruleset_fd));
 }
 
+TEST_F(protocol, rule_with_unknown_access)
+{
+	const struct landlock_ruleset_attr ruleset_attr = {
+		.handled_access_net = ACCESS_ALL,
+	};
+	struct landlock_socket_attr protocol = {
+		.domain = self->srv0.protocol.domain,
+		.type = self->srv0.protocol.type,
+	};
+	int ruleset_fd;
+	__u64 access;
+
+	ruleset_fd =
+		landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0);
+	ASSERT_LE(0, ruleset_fd);
+
+	for (access = 1ULL << 63; access != ACCESS_LAST; access >>= 1) {
+		protocol.allowed_access = access;
+		EXPECT_EQ(-1,
+			  landlock_add_rule(ruleset_fd, LANDLOCK_RULE_SOCKET,
+					    &protocol, 0));
+		EXPECT_EQ(EINVAL, errno);
+	}
+	EXPECT_EQ(0, close(ruleset_fd));
+}
+
 TEST_HARNESS_MAIN
-- 
2.34.1