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

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Message-ID: <CAHk-=wit4EqOntq3Y8-d6spWYQT7r-U3kTLcagGb2vbAhwvrJQ@mail.gmail.com>
Date:   Wed, 13 May 2020 16:07:17 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Borislav Petkov <bp@...e.de>,
        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>,
        "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 2:50 PM Arnd Bergmann <arnd@...db.de> wrote:
>
> Right, in particular since Linus started building with gcc-10 already and
> would likely soon run into that problem if he hasn't already ;-)

I don't happen to have stack canaries on the configs I actually boot,
so I didn't notice.

But yes, we should get this before 5.7 and mark it for stable, since
F32 is now gcc-10, so people will start hitting it if they enable
stack canaries.

         Linus