linux-kernel - Re: [PATCH 3/3] objtool: Add relocation check for alternative sections

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Message-ID: <CAHk-=wgN0RtGNnYHjnaxtjO3BxL=t-nTUnEEwZu5J--BDhb95A@mail.gmail.com>
Date:   Mon, 10 Feb 2020 17:51:44 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     "the arch/x86 maintainers" <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Borislav Petkov <bp@...e.de>,
        Julien Thierry <jthierry@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH 3/3] objtool: Add relocation check for alternative sections

On Mon, Feb 10, 2020 at 10:33 AM Josh Poimboeuf <jpoimboe@...hat.com> wrote:
>
> So disallow relocations in alternative code, except where the x86 arch
> code allows it.

LGTM. Did this actually find anything? And if not, did you verify that
it would by intentionally creating a bad alternative (perhaps the
broken one from my patch?)

                Linus