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Message-ID: <CAHk-=wj6t2i1BgmWP1Zb2WVF3zZzkHvsxsALJk7VpfKm6UgLcw@mail.gmail.com>
Date:   Thu, 4 Mar 2021 15:37:14 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-hardening@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kbuild: rebuild GCC plugins when the compiler is upgraded

On Thu, Mar 4, 2021 at 3:20 PM Kees Cook <keescook@...omium.org> wrote:
>
> This seems fine to me, but I want to make sure Josh has somewhere to
> actually go with this. Josh, does this get you any closer? It sounds
> like the plugins need to move to another location for packaged kernels?

Well, it might be worth extending the stuff that gets installed with
/lib/modules/<kernel-version>/ with enough information and
infrastruvcture to then build any external modules.

Yeah, yeah, there's the /boot/config-<kernelversion> thing too, but
honestly, that probably shouldn't have been in /boot to begin with.
That, and the plugins - and possibly any hashes needed for randstruct
etc - might be good to squirrell away in a
/lib/modules/<kernelversion>/build/ subdirectory?

I dunno. I obviously don't build external modules to begin with, much
less with distro kernels...

             Linus

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