[RFC PATCH v3 05/19] selftests/landlock: Test adding a rule for each unknown access

[Mikhail Ivanov]

Add test that validates behaviour of Landlock after rule with
unknown access is added.

Signed-off-by: Mikhail Ivanov <ivanov.mikhail1 at huawei-partners.com>
---
Changes since v2:
* Replaces EXPECT_EQ with ASSERT_EQ for close().
* Refactors commit title.

Changes since v1:
* Refactors commit messsage.
---
 .../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 cb23efd3ccc9..811bdaa95a7a 100644
--- a/tools/testing/selftests/landlock/socket_test.c
+++ b/tools/testing/selftests/landlock/socket_test.c
@@ -325,4 +325,30 @@ TEST_F(protocol, socket_access_rights)
 	ASSERT_EQ(0, close(ruleset_fd));
 }
 
+TEST_F(protocol, rule_with_unknown_access)
+{
+	const struct landlock_ruleset_attr ruleset_attr = {
+		.handled_access_socket = ACCESS_ALL,
+	};
+	struct landlock_socket_attr protocol = {
+		.family = self->prot.family,
+		.type = self->prot.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);
+	}
+	ASSERT_EQ(0, close(ruleset_fd));
+}
+
 TEST_HARNESS_MAIN
-- 
2.34.1