linux-kernel - [PATCH 1/2] selftests: landlock: allow other ABI versions

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Date:   Wed,  9 Aug 2023 18:04:34 +0100
From:   Andre Przywara <andre.przywara@....com>
To:     Mickaël Salaün <mic@...ikod.net>,
        Shuah Khan <shuah@...nel.org>
Cc:     linux-security-module@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] selftests: landlock: allow other ABI versions

At the moment the abi_version subtest of the landlock selftest expects
exactly version 3 of the landlock syscall ABI. However older kernels
returned a smaller number (or even -1, for the initial code), and the
kselftest documentation states that older kernels should still be
supported.

Relax the test for the return value, to just not accept 0, which was
never a value returned by this syscall (the initial ABI version was 1).

This fixes kselftests runs on older kernels like on my Ubuntu 20.04
system.

Signed-off-by: Andre Przywara <andre.przywara@....com>
---
 tools/testing/selftests/landlock/base_test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
index 792c3f0a59b4f..1e3b6de57e80e 100644
--- a/tools/testing/selftests/landlock/base_test.c
+++ b/tools/testing/selftests/landlock/base_test.c
@@ -75,7 +75,7 @@ TEST(abi_version)
 	const struct landlock_ruleset_attr ruleset_attr = {
 		.handled_access_fs = LANDLOCK_ACCESS_FS_READ_FILE,
 	};
-	ASSERT_EQ(3, landlock_create_ruleset(NULL, 0,
+	ASSERT_NE(0, landlock_create_ruleset(NULL, 0,
 					     LANDLOCK_CREATE_RULESET_VERSION));

 	ASSERT_EQ(-1, landlock_create_ruleset(&ruleset_attr, 0,
-- 
2.25.1