linux-kernel - Re: [PATCH v4 seccomp 5/5] seccomp/cache: Report cache data through /proc/pid/seccomp

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Message-ID: <202010121556.1110776B83@keescook>
Date:   Mon, 12 Oct 2020 15:57:36 -0700
From:   Kees Cook <keescook@...omium.org>
To:     YiFei Zhu <zhuyifei1999@...il.com>
Cc:     Linux Containers <containers@...ts.linux-foundation.org>,
        YiFei Zhu <yifeifz2@...inois.edu>, bpf <bpf@...r.kernel.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        Aleksa Sarai <cyphar@...har.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Andy Lutomirski <luto@...capital.net>,
        David Laight <David.Laight@...lab.com>,
        Dimitrios Skarlatos <dskarlat@...cmu.edu>,
        Giuseppe Scrivano <gscrivan@...hat.com>,
        Hubertus Franke <frankeh@...ibm.com>,
        Jack Chen <jianyan2@...inois.edu>,
        Jann Horn <jannh@...gle.com>,
        Josep Torrellas <torrella@...inois.edu>,
        Tianyin Xu <tyxu@...inois.edu>,
        Tobin Feldman-Fitzthum <tobin@....com>,
        Tycho Andersen <tycho@...ho.pizza>,
        Valentin Rothberg <vrothber@...hat.com>,
        Will Drewry <wad@...omium.org>
Subject: Re: [PATCH v4 seccomp 5/5] seccomp/cache: Report cache data through
 /proc/pid/seccomp_cache

On Sat, Oct 10, 2020 at 08:26:16AM -0500, YiFei Zhu wrote:
> On Fri, Oct 9, 2020 at 6:14 PM Kees Cook <keescook@...omium.org> wrote:
> > HAVE_ARCH_SECCOMP_CACHE isn't used any more. I think this was left over
> > from before.
> 
> Oh, I was meant to add this to the dependencies of
> SECCOMP_CACHE_DEBUG. Is this something that would make sense?

I think it's fine to just have this "dangle" with a help text update of
"if seccomp action caching is supported by the architecture, provide the
/proc/$pid ..."

-- 
Kees Cook