Bug#993162: libc6: i386 (Geode LX): latest push to Bookwork produces multiple sig ILL

To: Aurelien Jarno <aurelien@aurel32.net>
Cc: 993162@bugs.debian.org, libgcc-s1@packages.debian.org, Martin-Éric Racine <martin-eric.racine@iki.fi>
Subject: Bug#993162: libc6: i386 (Geode LX): latest push to Bookwork produces multiple sig ILL
From: Florian Weimer <fweimer@redhat.com>
Date: Sun, 29 Aug 2021 14:32:04 +0200
Message-id: <[🔎] 875yvov3cr.fsf@oldenburg.str.redhat.com>
Reply-to: Florian Weimer <fweimer@redhat.com>, 993162@bugs.debian.org
In-reply-to: <[🔎] YSoP1914E9gPBLt1@aurel32.net> (Aurelien Jarno's message of "Sat, 28 Aug 2021 12:28:39 +0200")
References: <163013867694.56935.2447983531754678180.reportbug@voima.lan> <163013867694.56935.2447983531754678180.reportbug@voima.lan> <YSoIu2+E4WGRreTL@aurel32.net> <163013867694.56935.2447983531754678180.reportbug@voima.lan> <[🔎] YSoP1914E9gPBLt1@aurel32.net> <163013867694.56935.2447983531754678180.reportbug@voima.lan>

* Aurelien Jarno:

> I have been looking at the corresponding instruction, this is:
>
> 00002ed0 <__cpu_indicator_init@GCC_4.8.0>:
>     2ed0:       f3 0f 1e fb             endbr32
>
> This is an Intel CET instruction, and it seems your CPU doesn't support
> executing it. Anyway this shows that the problem is in libgcc-s1, I am
> therefore reassigning the bug.

Correct, CET uses long NOPs, which are not supported by some x86 CPUs
and trap on them.

Thanks,
Florian

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References:
- Re: Bug#993162: libc6: i386 (Geode LX): latest push to Bookwork produces multiple sig ILL
  - From: Aurelien Jarno <aurelien@aurel32.net>

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