linux-hardening - Re: [PATCH RFC] gcc-plugins: Handle GCC version mismatch for OOT modules

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Message-ID: <CAHk-=wiT3FGuKuqLniBN2T_PZwD0GH4kf3XNCzq2tfChqn0+SQ@mail.gmail.com>
Date:   Thu, 4 Mar 2021 11:12:42 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-hardening@...r.kernel.org,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Justin Forbes <jforbes@...hat.com>,
        Ondrej Mosnacek <omosnace@...hat.com>,
        Frank Eigler <fche@...hat.com>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH RFC] gcc-plugins: Handle GCC version mismatch for OOT modules

On Thu, Mar 4, 2021 at 7:36 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> All the kernel-space objects are rebuilt
> when the compiler is upgraded.

I very much NAK'ed that one. Why did that go in?

Or maybe I NAK'ed another version of it (I think the one I NAK'ed was
from Josh), and didn't realize that there were multiple ones.

> Linus complaint about GCC plugins not being rebuilt.

Yes, and that was a separate complaint and not at all tied to the other objects.

Gcc plugins aren't kernel object files at all. They are very much like
dynamically loadable libraries to gcc itself.

               Linus