linux-kernel - [PATCH v1 5/7] selftest/landlock: Add tests for unknown access rights

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Date:   Mon, 21 Feb 2022 16:53:09 +0100
From:   Mickaël Salaün <mic@...ikod.net>
To:     James Morris <jmorris@...ei.org>,
        "Serge E . Hallyn" <serge@...lyn.com>
Cc:     Mickaël Salaün <mic@...ikod.net>,
        Jann Horn <jannh@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Konstantin Meskhidze <konstantin.meskhidze@...wei.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Paul Moore <paul@...l-moore.com>,
        Shuah Khan <shuah@...nel.org>, linux-api@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        Mickaël Salaün <mic@...ux.microsoft.com>
Subject: [PATCH v1 5/7] selftest/landlock: Add tests for unknown access rights

From: Mickaël Salaün <mic@...ux.microsoft.com>

Make sure that trying to use unknown access rights returns an error.

Cc: Shuah Khan <shuah@...nel.org>
Signed-off-by: Mickaël Salaün <mic@...ux.microsoft.com>
Link: https://lore.kernel.org/r/20220221155311.166278-6-mic@digikod.net
---
 tools/testing/selftests/landlock/fs_test.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
index 699cda25a12a..5506472a46ce 100644
--- a/tools/testing/selftests/landlock/fs_test.c
+++ b/tools/testing/selftests/landlock/fs_test.c
@@ -439,6 +439,22 @@ TEST_F_FORK(layout1, file_access_rights)
 	ASSERT_EQ(0, close(path_beneath.parent_fd));
 }
 
+TEST_F_FORK(layout1, unknown_access_rights)
+{
+	__u64 access_mask;
+
+	for (access_mask = 1ULL << 63; access_mask != ACCESS_LAST;
+			access_mask >>= 1) {
+		struct landlock_ruleset_attr ruleset_attr = {
+			.handled_access_fs = access_mask,
+		};
+
+		ASSERT_EQ(-1, landlock_create_ruleset(&ruleset_attr,
+					sizeof(ruleset_attr), 0));
+		ASSERT_EQ(EINVAL, errno);
+	}
+}
+
 static void add_path_beneath(struct __test_metadata *const _metadata,
 		const int ruleset_fd, const __u64 allowed_access,
 		const char *const path)
-- 
2.35.1