[PATCH 16/27] selftests/landlock: Check errno for combined VERSION and ERRATA flags

The errata test checks that combining LANDLOCK_CREATE_RULESET_VERSION
and LANDLOCK_CREATE_RULESET_ERRATA fails, but not the resulting errno,
unlike the other checks in this test.

Assisted-by: LLM
Signed-off-by: Günther Noack <redacted>
---
 tools/testing/selftests/landlock/base_test.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c
index e486e557f453..5f10300a60cd 100644
--- a/tools/testing/selftests/landlock/base_test.c
+++ b/tools/testing/selftests/landlock/base_test.c

@@ -136,6 +136,8 @@ TEST(errata)
 			      NULL, 0,
 			      LANDLOCK_CREATE_RULESET_VERSION |
 				      LANDLOCK_CREATE_RULESET_ERRATA));
+	ASSERT_EQ(EINVAL, errno);
+
 	ASSERT_EQ(-1, landlock_create_ruleset(NULL, 0,
 					      LANDLOCK_CREATE_RULESET_ERRATA |
 						      1 << 31));

-- 
2.56.0