linux-kernel - Re: [RFC PATCH seccomp 0/2] seccomp: Add bitmap cache of arg-independent filter results that allow syscalls

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Date:   Mon, 21 Sep 2020 17:57:43 -0500
From:   YiFei Zhu <zhuyifei1999@...il.com>
To:     Tycho Andersen <tycho@...ho.pizza>
Cc:     Linux Containers <containers@...ts.linux-foundation.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Giuseppe Scrivano <gscrivan@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        YiFei Zhu <yifeifz2@...inois.edu>,
        Tobin Feldman-Fitzthum <tobin@....com>,
        Dimitrios Skarlatos <dskarlat@...cmu.edu>,
        Valentin Rothberg <vrothber@...hat.com>,
        Hubertus Franke <frankeh@...ibm.com>,
        Jack Chen <jianyan2@...inois.edu>,
        Josep Torrellas <torrella@...inois.edu>,
        bpf <bpf@...r.kernel.org>, Tianyin Xu <tyxu@...inois.edu>,
        Andy Lutomirski <luto@...capital.net>,
        Will Drewry <wad@...omium.org>, Jann Horn <jannh@...gle.com>,
        Aleksa Sarai <cyphar@...har.com>,
        kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH seccomp 0/2] seccomp: Add bitmap cache of
 arg-independent filter results that allow syscalls

On Mon, Sep 21, 2020 at 11:39 AM Tycho Andersen <tycho@...ho.pizza> wrote:
> I see, I missed this somehow. So is there a reason to hide this behind
> a config option? Isn't it just always better?
>
> Tycho

You have a good point, though, I think keeping a config would allow
people to "test the differences" in the unlikely case that some issue
occurs. Jann pointed that it should be on by default so I'll do that.

YiFei Zhu