[PATCH 03/27] selftests/landlock: Check the thread result in audit.thread

[Günther Noack]

thread_audit_test() reports failures through its return value, but
audit.thread joins the thread with a NULL result pointer, so these
failures go unnoticed.

Check the returned value, as the other thread-based audit tests do.

Assisted-by: LLM
Signed-off-by: Günther Noack <gnoack3000@xxxxxxxxx>
---
 tools/testing/selftests/landlock/audit_test.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/landlock/audit_test.c b/tools/testing/selftests/landlock/audit_test.c
index 502a0825d877..81cb31aa32ad 100644
--- a/tools/testing/selftests/landlock/audit_test.c
+++ b/tools/testing/selftests/landlock/audit_test.c
@@ -227,6 +227,7 @@ TEST_F(audit, thread)
 	__u64 allocated_dom = 2;
 	__u64 deallocated_dom = 3;
 	pthread_t thread;
+	void *thread_ret;
 	int pipe_child[2], pipe_parent[2];
 	char buffer;
 	struct thread_data child_data;
@@ -270,7 +271,8 @@ TEST_F(audit, thread)
 	/* Signals the thread to exit, which will generate a domain deallocation. */
 	ASSERT_EQ(1, write(pipe_parent[1], ".", 1));
 	EXPECT_EQ(0, close(pipe_parent[1]));
-	ASSERT_EQ(0, pthread_join(thread, NULL));
+	ASSERT_EQ(0, pthread_join(thread, &thread_ret));
+	EXPECT_EQ(NULL, thread_ret);
 
 	EXPECT_EQ(0, matches_log_domain_deallocated(
 			     self->audit_fd, 1, denial_dom, &deallocated_dom));
-- 
2.56.0