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Message-ID: <94c3be49-0262-c613-e5f5-49b536985dde@physik.fu-berlin.de>
Date:   Mon, 21 Feb 2022 20:49:20 +0100
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Subject: Re: regression: Bug 215601 - gcc segv at startup on ia64
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To:     Kees Cook <keescook@chromium.org>,
        Thorsten Leemhuis <regressions@leemhuis.info>,
        Anthony Yznaga <anthony.yznaga@oracle.com>
Cc:     matoro_bugzilla_kernel@matoro.tk,
        Andrew Morton <akpm@linux-foundation.org>,
        "regressions@lists.linux.dev" <regressions@lists.linux.dev>,
        linux-ia64@vger.kernel.org,
        Linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>
References: <a3edd529-c42d-3b09-135c-7e98a15b150f@leemhuis.info>
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 <03497313-A472-4152-BD28-41C35E4E824E@chromium.org>
From:   John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
In-Reply-To: <03497313-A472-4152-BD28-41C35E4E824E@chromium.org>
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Hi Kees!

On 2/21/22 08:42, Kees Cook wrote:
>>>> Reverting this commit resolves the issue up to and including git tip,
>>>> with no (visible) issues.
>>>>
>>>> Hardware:  HP Integrity rx2800 i2 Kernel config attached.
>>>
>>> Could somebody take a look into this? Or was this discussed somewhere
>>> else already? Or even fixed?
>>>
>>> Anyway, to get this tracked:
>>>
>>> #regzbot introduced: 5f501d555653f8968011a1e65ebb121c8b43c144
>>> #regzbot from: matoro <matoro_bugzilla_kernel@matoro.tk>
>>> #regzbot title: gcc segv at startup on ia64
>>> #regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215601
> 
> Does this fix it?
> 
> https://www.ozlabs.org/~akpm/mmotm/broken-out/elf-fix-overflow-in-total-mapping-size-calculation.patch

I have applied this patch on top of 038101e6b2cd5c55f888f85db42ea2ad3aecb4b6 and it doesn't
fix the problem for me. Reverting 5f501d555653f8968011a1e65ebb121c8b43c144, however, fixes
the problem.

FWIW, this problem doesn't just affect GCC but systemd keeps segfaulting with this change as well.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
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