linux-kernel - Re: [PATCH 4/4] tests: add pidfd

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Message-ID: <20190327205536.xa47wrwgwfqqnocg@brauner.io>
Date:   Wed, 27 Mar 2019 21:55:38 +0100
From:   Christian Brauner <christian@...uner.io>
To:     Kees Cook <keescook@...omium.org>
Cc:     Jann Horn <jannh@...gle.com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        Andy Lutomirski <luto@...nel.org>,
        David Howells <dhowells@...hat.com>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Linux API <linux-api@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Michael Kerrisk <mtk.manpages@...il.com>, bl0pbl33p@...il.com,
        "Dmitry V. Levin" <ldv@...linux.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Oleg Nesterov <oleg@...hat.com>,
        nagarathnam.muthusamy@...cle.com, Aleksa Sarai <cyphar@...har.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Joel Fernandes <joel@...lfernandes.org>,
        Daniel Colascione <dancol@...gle.com>
Subject: Re: [PATCH 4/4] tests: add pidfd_open() tests

On Wed, Mar 27, 2019 at 12:36:46PM -0700, Kees Cook wrote:
> On Wed, Mar 27, 2019 at 9:22 AM Christian Brauner <christian@...uner.io> wrote:
> >
> > This adds a simple test case for pidfd_open().
> 
> Thank you for the tests. :) It might be nice to see more extensive
> negative testing -- making sure pids aren't reachable from mismatched

There'll be more tests for sure! Once people say that they are happy
with the design I can put in the effort to expand the tests to more
elaborate scenarios. :)

> pid namespaces, etc, but this gets us basic regression testing. Also,
> you might save some copy/paste code using kselftest_harness.h's
> interfaces.
> 
> -- 
> Kees Cook