[PATCH 5.18 780/879] selftests/landlock: Add tests for unknown access rights

Greg Kroah-Hartman
2022-06-08T00:58:27Z

From: Mickaël Salaün <mic@digikod.net>

commit c56b3bf566da5a0dd3b58ad97a614b0928b06ebf upstream.

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

Cc: Shuah Khan <shuah@kernel.org>
Link: https://lore.kernel.org/r/20220506160820.524344-5-mic@digikod.net
Cc: stable@vger.kernel.org
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
tools/testing/selftests/landlock/fs_test.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

--- a/tools/testing/selftests/landlock/fs_test.c
+++ b/tools/testing/selftests/landlock/fs_test.c
@@ -448,6 +448,22 @@ 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)