linux-kernel - Re: [PATCH v4 1/2] Provide in-kernel headers for making it easy to extend the kernel

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Message-ID: <CAMuHMdUmnrJtu8bBeUgtiU6y_TLHM27z1WxpPia4dXMpApeijw@mail.gmail.com>
Date:   Fri, 8 Mar 2019 18:59:23 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Joel Fernandes <joel@...lfernandes.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexei Starovoitov <ast@...nel.org>,
        atish patra <atishp04@...il.com>,
        Daniel Colascione <dancol@...gle.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Guenter Roeck <groeck@...omium.org>,
        Jonathan Corbet <corbet@....net>,
        Karim Yaghmour <karim.yaghmour@...rsys.com>,
        Kees Cook <keescook@...omium.org>,
        Android Kernel Team <kernel-team@...roid.com>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        linux-trace-devel@...r.kernel.org,
        Manoj Rao <linux@...ojrajarao.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Qais Yousef <qais.yousef@....com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Shuah Khan <shuah@...nel.org>, Yonghong Song <yhs@...com>
Subject: Re: [PATCH v4 1/2] Provide in-kernel headers for making it easy to
 extend the kernel

Hi Greg,

On Fri, Mar 8, 2019 at 6:05 PM Greg KH <gregkh@...uxfoundation.org> wrote:
> On Fri, Mar 08, 2019 at 05:42:32AM -0800, Joel Fernandes wrote:
> > On Fri, Mar 8, 2019, 3:53 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > > > It is just so much easier to use tar + xz at build time, and leave the
> > > > decompression task to the user. After decompression, the files will live on
> > > > the disk and the page-cache mechanism will free memory when/if the files fall
> > > > off the LRUs.
> > >
> > > I'm also considering how generic and extensible the solution is.
> > > What if people need other build artifacts in the future (e.g. signing key to
> > > load signed modules)?
> >
> > That sounds like it could be useful. I don't see any reason off the
> > top why that would not be possible to add to the list of archived
> > files in the future. The patch allows populating the list of files
> > from Kbuild using ikh_file_list variable.
>
> Um, no, you don't want the signing key in the kernel itself, as that
> totally defeats the purpose of the signing key :)

In a loadable module?
He who has the module, can build and sign more modules.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds