From: Kees Cook <keescook@chromium.org>
To: YiFei Zhu <zhuyifei1999@gmail.com>
Cc: Jann Horn <jannh@google.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Giuseppe Scrivano <gscrivan@redhat.com>,
Will Drewry <wad@chromium.org>, bpf <bpf@vger.kernel.org>,
YiFei Zhu <yifeifz2@illinois.edu>,
Linux API <linux-api@vger.kernel.org>,
Linux Containers <containers@lists.linux-foundation.org>,
Tobin Feldman-Fitzthum <tobin@ibm.com>,
Hubertus Franke <frankeh@us.ibm.com>,
Andy Lutomirski <luto@amacapital.net>,
Valentin Rothberg <vrothber@redhat.com>,
Dimitrios Skarlatos <dskarlat@cs.cmu.edu>,
Jack Chen <jianyan2@illinois.edu>,
Josep Torrellas <torrella@illinois.edu>,
Tianyin Xu <tyxu@illinois.edu>,
kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/6] seccomp: Implement constant action bitmaps
Date: Thu, 24 Sep 2020 01:15:24 -0700 [thread overview]
Message-ID: <202009240112.C48EF38EC2@keescook> (raw)
In-Reply-To: <CABqSeARV4prXOWf9qOBnm5Mm_aAdjwquqFFLQSuL0EegqeWEkA@mail.gmail.com>
On Thu, Sep 24, 2020 at 03:07:23AM -0500, YiFei Zhu wrote:
> On Thu, Sep 24, 2020 at 2:37 AM Kees Cook <keescook@chromium.org> wrote:
> > >
> > > This belongs over into patch 1.
> >
> > Thanks! I was rushing to get this posted so YiFei Zhu wouldn't spend
> > time fighting with arch and Kconfig stuff. :) I'll clean this (and the
> > other random cruft) up.
>
> Wait, what? I'm sorry. We have already begun fixing the mentioned
> issues (mostly the split bitmaps for different arches). Although yes
> it's nice to have another implementation to refer to so we get the
> best of both worlds (and yes I'm already copying some of the code I
> think are better here over there), don't you think it's not nice to
> say "Hey I've worked on this in June, it needed rework but I didn't
> send the newer version. Now you sent yours so I'll rush mine so your
> work is redundant."?
I was trying to be helpful: you hadn't seen the RFC, and it was missing
the emulator piece, which I wanted to be small, so I put got it out the
door today. I didn't want you to think you needed to port the larger
emulator over, for example.
> That said, I do think this should be configurable. Users would be free
> to experiment with the bitmap on or off, just like users may turn
> seccomp off entirely. A choice also allows users to select different
> implementations, a few whom I work with have ideas on how to
> accelerate / cache argument dependent syscalls, for example.
I'm open to ideas, but I want to have a non-optional performance
improvement as the first step. :) "seccomp is magically faster" was my
driving goal.
--
Kees Cook
next prev parent reply other threads:[~2020-09-24 8:15 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-23 23:29 [PATCH v1 0/6] seccomp: Implement constant action bitmaps Kees Cook
2020-09-23 23:29 ` [PATCH 1/6] seccomp: Introduce SECCOMP_PIN_ARCHITECTURE Kees Cook
2020-09-24 0:41 ` Jann Horn
2020-09-24 7:11 ` Kees Cook
2020-09-23 23:29 ` [PATCH 2/6] x86: Enable seccomp architecture tracking Kees Cook
2020-09-24 0:45 ` Jann Horn
2020-09-24 7:12 ` Kees Cook
2020-09-23 23:29 ` [PATCH 3/6] seccomp: Implement constant action bitmaps Kees Cook
2020-09-24 0:25 ` Jann Horn
2020-09-24 7:36 ` Kees Cook
2020-09-24 8:07 ` YiFei Zhu
2020-09-24 8:15 ` Kees Cook [this message]
2020-09-24 8:22 ` YiFei Zhu
2020-09-24 12:28 ` Jann Horn
2020-09-24 12:37 ` David Laight
2020-09-24 12:56 ` Jann Horn
[not found] ` <DM6PR11MB271492D0565E91475D949F5DEF390@DM6PR11MB2714.namprd11.prod.outlook.com>
2020-09-24 0:36 ` YiFei Zhu
2020-09-24 7:38 ` Kees Cook
2020-09-24 7:51 ` YiFei Zhu
2020-09-23 23:29 ` [PATCH 4/6] seccomp: Emulate basic filters for constant action results Kees Cook
2020-09-23 23:47 ` Jann Horn
2020-09-24 7:46 ` Kees Cook
2020-09-24 15:28 ` Paul Moore
2020-09-24 19:52 ` Kees Cook
2020-09-24 20:46 ` Paul Moore
2020-09-24 21:35 ` Kees Cook
2020-09-23 23:29 ` [PATCH 5/6] selftests/seccomp: Compare bitmap vs filter overhead Kees Cook
2020-09-23 23:29 ` [PATCH 6/6] [DEBUG] seccomp: Report bitmap coverage ranges Kees Cook
2020-09-24 13:40 ` [PATCH v1 0/6] seccomp: Implement constant action bitmaps Rasmus Villemoes
2020-09-24 13:58 ` YiFei Zhu
2020-09-25 5:56 ` Rasmus Villemoes
2020-09-25 7:07 ` YiFei Zhu
2020-09-26 18:11 ` YiFei Zhu
2020-09-28 20:04 ` Kees Cook
2020-09-28 20:16 ` YiFei Zhu
2020-09-24 14:05 ` Jann Horn
2020-09-24 18:57 ` Andrea Arcangeli
2020-09-24 19:18 ` Jann Horn
[not found] ` <9dbe8e3bbdad43a1872202ff38c34ca2@DM5PR11MB1692.namprd11.prod.outlook.com>
2020-09-24 19:48 ` Tianyin Xu
2020-09-24 20:00 ` Kees Cook
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