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[RFC,4/4] selftest/pidfd: add test for thread-group leader pidfd open for thread

Message ID 20250403-work-pidfd-fixes-v1-4-a123b6ed6716@kernel.org (mailing list archive)
State New
Headers show
Series pidfd: improve uapi when task isn't found | expand

Commit Message

Christian Brauner April 3, 2025, 2:09 p.m. UTC 
Verify that we report ENOENT when userspace tries to create a
thread-group leader pidfd for a thread pidfd that isn't a thread-group
leader.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 tools/testing/selftests/pidfd/pidfd_info_test.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/tools/testing/selftests/pidfd/pidfd_info_test.c b/tools/testing/selftests/pidfd/pidfd_info_test.c
index accfd6bdc539..a0eb6e81eaa2 100644
--- a/tools/testing/selftests/pidfd/pidfd_info_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_info_test.c
@@ -299,6 +299,7 @@  TEST_F(pidfd_info, thread_group)
 	/* Opening a thread as a thread-group leader must fail. */
 	pidfd_thread = sys_pidfd_open(pid_thread, 0);
 	ASSERT_LT(pidfd_thread, 0);
+	ASSERT_EQ(errno, ENOENT);
 
 	/* Opening a thread as a PIDFD_THREAD must succeed. */
 	pidfd_thread = sys_pidfd_open(pid_thread, PIDFD_THREAD);