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Date:   Sun, 20 Feb 2022 23:42:13 -0800
From:   Kees Cook <keescook@chromium.org>
To:     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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On February 20, 2022 9:19:46 AM PST, Thorsten Leemhuis <regressions@leemhu=
is=2Einfo> wrote:
>[reply to get Anthony on board, I screwed up when copy and pasting his
>email address when sending below mail; sorry for the noise!]
>
>On 20=2E02=2E22 18:12, Thorsten Leemhuis wrote:
>> Hi, this is your Linux kernel regression tracker=2E
>>=20
>> I noticed a regression report in bugzilla=2Ekernel=2Eorg that afaics no=
body
>> acted upon since it was reported about a week ago, that's why I'm hereb=
y
>> forwarding it to the lists and the relevant people=2E To quote
>> https://bugzilla=2Ekernel=2Eorg/show_bug=2Ecgi?id=3D215601 :
>>=20
>>> On ia64, after 5f501d555653f8968011a1e65ebb121c8b43c144, the gcc
>>> binary crashes with SIGSEGV at startup (i=2Ee=2E, during ELF loading)=
=2E
>>> Only gcc exhibits the crash (including g++, etc), other toolchain
>>> components (such as ld, ldd, etc) do not, and neither does any other
>>> binary from what I can tell=2E  I also haven't observed the issue on
>>> any other architecture=2E
>>>
>>> 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
>>=20
>> Could somebody take a look into this? Or was this discussed somewhere
>> else already? Or even fixed?
>>=20
>> Anyway, to get this tracked:
>>=20
>> #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=3D2156=
01

Does this fix it?

https://www=2Eozlabs=2Eorg/~akpm/mmotm/broken-out/elf-fix-overflow-in-tota=
l-mapping-size-calculation=2Epatch

-Kees


>>=20
>> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat=
)
>>=20
>> P=2ES=2E: As the Linux kernel's regression tracker I'm getting a lot of
>> reports on my table=2E I can only look briefly into most of them and la=
ck
>> knowledge about most of the areas they concern=2E I thus unfortunately
>> will sometimes get things wrong or miss something important=2E I hope
>> that's not the case here; if you think it is, don't hesitate to tell me
>> in a public reply, it's in everyone's interest to set the public record
>> straight=2E
>>=20

--=20
Kees Cook