linux-hardening - Re: [PATCH] selftests: proc: Make sure wchan works when it exists

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Date:   Thu, 21 Oct 2021 13:10:19 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Mark Rutland <mark.rutland@....com>, Shuah Khan <shuah@...nel.org>,
        Alexey Dobriyan <adobriyan@...il.com>,
        linux-kselftest@...r.kernel.org,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexey Gladkov <gladkov.alexey@...il.com>, jannh@...gle.com,
        vcaputo@...garu.com, mingo@...hat.com, juri.lelli@...hat.com,
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Subject: Re: [PATCH] selftests: proc: Make sure wchan works when it exists

On Thu, Oct 21, 2021 at 09:30:33PM +0200, Peter Zijlstra wrote:
> On Thu, Oct 21, 2021 at 10:09:33AM -0700, Kees Cook wrote:
> 
> > > Hi Peter,
> > > 
> > > Can you add this to the wchan series, please? This should help wchan from
> > > regressing in the future, and allow us to notice if the depth accidentally
> > > changes, like Mark saw.
> > > ---
> > 
> > I'd like to make sure we have a regression test for this. Will you add
> > this to the wchan series please?
> 
> I have it there, but it's in the part that didn't make it in yet. I'm
> currently in the progress of reworking that.
> 
> Do you want it it ahead of all that?

Nah, that's fine. I'm not in any rush; I just wanted to make sure it
didn't get lost. I didn't realize it was already there (I had only seen
the -tip emails). Sorry for the noise; thanks!

-Kees

-- 
Kees Cook