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

On Fri, Mar 8, 2019 at 6:05 PM Greg KH <gregkh@linuxfoundation.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@linux-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@linux-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