Re: [RFC PATCH 3/3] selftests: memfd: error out test process when child test fails

[Jeff Xu <jeffxu@google.com>]

On Thu, Jul 13, 2023 at 7:34 AM Aleksa Sarai <cyphar@cyphar.com> wrote:
>
> Before this change, a test runner using this self test would see a
> return code of 0 when the tests using a child process (namely the
> MFD_NOEXEC_SEAL and MFD_EXEC tests) failed, masking test failures.
>
> Fixes: 11f75a01448f ("selftests/memfd: add tests for MFD_NOEXEC_SEAL MFD_EXEC")
> Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
> ---
>  tools/testing/selftests/memfd/memfd_test.c | 19 ++++++++++++++++++-
>  1 file changed, 18 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/memfd/memfd_test.c b/tools/testing/selftests/memfd/memfd_test.c
> index d8342989c547..8b7390ad81d1 100644
> --- a/tools/testing/selftests/memfd/memfd_test.c
> +++ b/tools/testing/selftests/memfd/memfd_test.c
> @@ -1219,7 +1219,24 @@ static pid_t spawn_newpid_thread(unsigned int flags, int (*fn)(void *))
>
>  static void join_newpid_thread(pid_t pid)
>  {
> -       waitpid(pid, NULL, 0);
> +       int wstatus;
> +
> +       if (waitpid(pid, &wstatus, 0) < 0) {
> +               printf("newpid thread: waitpid() failed: %m\n");
> +               abort();
> +       }
> +
> +       if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) != 0) {
> +               printf("newpid thread: exited with non-zero error code %d\n",
> +                      WEXITSTATUS(wstatus));
> +               abort();
> +       }
> +
> +       if (WIFSIGNALED(wstatus)) {
> +               printf("newpid thread: killed by signal %d\n",
> +                      WTERMSIG(wstatus));
> +               abort();
> +       }
>  }
>
Signed-off-by: Jeff Xu <jeffxu@google.com>

-Jeff Xu

>  /*
> --
> 2.41.0
>