linux-kernel - Re: [PATCH v3 2/2] pidfd: add pidfd

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Date:   Mon, 29 Jul 2019 09:31:23 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Christian Brauner <christian@...uner.io>
Cc:     linux-kernel@...r.kernel.org, oleg@...hat.com,
        torvalds@...ux-foundation.org, arnd@...db.de,
        ebiederm@...ssion.com, joel@...lfernandes.org, tglx@...utronix.de,
        tj@...nel.org, dhowells@...hat.com, jannh@...gle.com,
        luto@...nel.org, akpm@...ux-foundation.org, cyphar@...har.com,
        viro@...iv.linux.org.uk, kernel-team@...roid.com
Subject: Re: [PATCH v3 2/2] pidfd: add pidfd_wait tests

On Sun, Jul 28, 2019 at 12:22:30AM +0200, Christian Brauner wrote:
> Add tests for pidfd_wait() and CLONE_WAIT_PID:
> - test that waitid(P_PIDFD) can wait on a pidfd
> - test that waitid(P_PIDFD) can wait on a pidfd and return siginfo_t
> - test that waitid(P_PIDFD) works with WEXITED
> - test that waitid(P_PIDFD) works with WSTOPPED
> - test that waitid(P_PIDFD) works with WUNTRACED
> - test that waitid(P_PIDFD) works with WCONTINUED
> - test that waitid(P_PIDFD) works with WNOWAIT
> - test that waitid(P_PIDFD)works with WNOHANG

Reviewed-by: Kees Cook <keescook@...omium.org>

This all looks good to me! :) One note that doesn't apply to this patch
in particular, but might be nice to add (as I didn't see in the existing
tests) was testing for pathological conditions: passing in /dev/zero for
the pidfd, etc. (Maybe I missed those?)

-- 
Kees Cook