Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system

To: Aurelien Jarno <aurel32@debian.org>, 1019855@bugs.debian.org
Cc: debian-bug-report@p0358.net
Subject: Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system
From: Samuel Thibault <sthibault@debian.org>
Date: Tue, 4 Oct 2022 19:33:00 +0200
Message-id: <[🔎] 20221004173300.dig7k25u7gvmh2po@begin>
Reply-to: Samuel Thibault <sthibault@debian.org>, 1019855@bugs.debian.org
In-reply-to: <[🔎] YzvYBzYqvmXNVmyW@aurel32.net>
References: <YyOBlbPVVo/QvAAc@aurel32.net> <YyoumqJrDr0/T3cU@aurel32.net> <f5271a8e-fff5-1502-4729-ecdb4b16b27e@p0358.cf> <2ece07fe-1994-3a70-8359-4d4fcee728c2@p0358.cf> <YzAKaOfvXB1HapqV@aurel32.net> <d47bf345-3612-6d29-35c1-17a19b8228bd@p0358.cf> <f5271a8e-fff5-1502-4729-ecdb4b16b27e@p0358.cf> <YzA+8HeR57bI0TXk@aurel32.net> <f5271a8e-fff5-1502-4729-ecdb4b16b27e@p0358.cf> <[🔎] YzvYBzYqvmXNVmyW@aurel32.net> <f5271a8e-fff5-1502-4729-ecdb4b16b27e@p0358.cf>

Hello,

Is there an easy way to unbrick a system affected by the issue? such as
a kernel-line option or a configuration file in /etc? I don't see how I
can set a GLIBC_TUNABLES environment variable for the whole system.

Samuel

Reply to:

Follow-Ups:
- Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system
  - From: debian-bug-report@p0358.net

References:
- Bug#1019855: Fwd: libc6: immediately crashes with SIGILL on 4th gen Intel Core CPUs (seems related to AVX2 instructions), bricking the whole system
  - From: Aurelien Jarno <aurel32@debian.org>