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Date:   Mon, 21 Feb 2022 12:58:22 -0800
From:   Kees Cook <keescook@chromium.org>
To:     John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
        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>
Subject: Re: regression: Bug 215601 - gcc segv at startup on ia64
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In-Reply-To: <94c3be49-0262-c613-e5f5-49b536985dde@physik.fu-berlin.de>
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On February 21, 2022 11:49:20 AM PST, John Paul Adrian Glaubitz <glaubitz@=
physik=2Efu-berlin=2Ede> wrote:
>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=2E
>>>>>
>>>>> Hardware:  HP Integrity rx2800 i2 Kernel config attached=2E
>>>>
>>>> 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=2Etk>
>>>> #regzbot title: gcc segv at startup on ia64
>>>> #regzbot link: https://bugzilla=2Ekernel=2Eorg/show_bug=2Ecgi?id=3D21=
5601
>>=20
>> Does this fix it?
>>=20
>> https://www=2Eozlabs=2Eorg/~akpm/mmotm/broken-out/elf-fix-overflow-in-t=
otal-mapping-size-calculation=2Epatch
>
>I have applied this patch on top of 038101e6b2cd5c55f888f85db42ea2ad3aecb=
4b6 and it doesn't
>fix the problem for me=2E Reverting 5f501d555653f8968011a1e65ebb121c8b43c=
144, however, fixes
>the problem=2E
>
>FWIW, this problem doesn't just affect GCC but systemd keeps segfaulting =
with this change as well=2E

Very weird! Can you attached either of those binaries to bugzilla (or a UR=
L I can fetch it from)? I can try to figure out where it is going weird=2E=
=2E=2E

--=20
Kees Cook