linux-kernel - Re: gcc-10: kernel stack is corrupted and fails to boot

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Message-ID: <CAK8P3a3XPCyNM7s3vbn8JYK6swA3ZpPtTWB+uhmAE3YEX-nmig@mail.gmail.com>
Date:   Wed, 13 May 2020 23:49:49 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Borislav Petkov <bp@...e.de>
Cc:     Arvind Sankar <nivedita@...m.mit.edu>,
        Kalle Valo <kvalo@...eaurora.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: gcc-10: kernel stack is corrupted and fails to boot

On Wed, May 13, 2020 at 11:41 PM Borislav Petkov <bp@...e.de> wrote:
>
> On Wed, May 13, 2020 at 11:28:09PM +0200, Arnd Bergmann wrote:
> > I see the patch in linux-next but not in mainline. I suppose we want
> > it in v5.7 and backported to stable kernels so they can boot when
> > built with gcc-10?
>
> It is queued for 5.8. For a good reason, if you read the whole thread
> Arvind pointed you to.
>
> Lemme guess: gcc10 got released in the meantime (hohumm, website says
> so) and so we probably should expedite this and send it to Linus now...?

Right, in particular since Linus started building with gcc-10 already and
would likely soon run into that problem if he hasn't already ;-)

      Arnd