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

[Greg Kroah-Hartman]

From: Mickaël Salaün <mic@xxxxxxxxxxx>

commit c56b3bf566da5a0dd3b58ad97a614b0928b06ebf upstream.

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

Cc: Shuah Khan <shuah@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220506160820.524344-5-mic@xxxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mickaël Salaün <mic@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 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)