Bug#1043585: Update on this issue

From	Salvatore Bonaccorso <carnil@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1043585: Update on this issue
Date	2023-08-17 09:50 +0200
Message-ID	<H3FVv-2rSN-1@gated-at.bofh.it> (permalink)
References	<H3FVv-2rSN-3@gated-at.bofh.it> <H3FVv-2rSN-5@gated-at.bofh.it> <H3FVv-2rSN-3@gated-at.bofh.it> <H3FVv-2rSN-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Hi Martin,

On Wed, Aug 16, 2023 at 07:16:58PM +0100, Martin Johnson wrote:
> Package: linux-image-amd64
> 
> Version: 6.1.0-11-amd64
> 
> Update of this recent issue - I might not have specified the package
> correctly, sorry for that - its the first bug I tried to report on Debian -
> hey Debian really is that good :-)
> 
> I found some sort of workaround too, but its far from ideal at present.
> 
> To avoid this issue you can set the kernel boot parameter:
> spec_rstack_overflow=off
> 
> Then the problem no longer exists, obviously with an additional and quite
> serious AMD Zen processor security issue.
> 
> So the cause is also related to the recent AMD Zen security patch.
> 
> The problem seems related to these posts on bugzilla.kernel.org, but is
> manifesting in a different way for me:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=217796
> 
> and this:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=217796

Did you meant to reference here two different bugzilla enties?

> Hope this information is of assistance for anyone who is lucky enough to
> find this information :-)

Thanks for providing that. Would it be possible for you to test a
custom kernel built with the following commit applied on top and see
if this resolved the issue you are seeing?

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=ba5ca5e5e6a1d55923e88b4a83da452166f5560e

See
https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#id-1.6.6.4
for instructions.

Regards,
Salvatore

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Bug#1043585: Update on this issue Salvatore Bonaccorso <carnil@debian.org> - 2023-08-17 09:50 +0200
  Processed: Re: Bug#1043585: Update on this issue "Debian Bug Tracking System" <owner@bugs.debian.org> - 2023-08-17 09:50 +0200
  Bug#1043585: Update on this issue Salvatore Bonaccorso <carnil@debian.org> - 2023-08-17 20:40 +0200

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