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Bug#1069301: linux-image-6.1.0-20-amd64: bluetooth causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2

Started bySalvatore Bonaccorso <carnil@debian.org>
First post2024-04-19 22:10 +0200
Last post2024-04-21 12:20 +0200
Articles 4 — 3 participants

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  Bug#1069301: linux-image-6.1.0-20-amd64: bluetooth causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2 Salvatore Bonaccorso <carnil@debian.org> - 2024-04-19 22:10 +0200
    Processed: Re: Bug#1069301: linux-image-6.1.0-20-amd64: bluetooth  causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-04-19 22:10 +0200
    Bug#1069301: linux-image-6.1.0-20-amd64: bluetooth causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2 Jeremy Lainé <jeremy.laine@m4x.org> - 2024-04-20 15:10 +0200
      Bug#1069301: linux-image-6.1.0-20-amd64: bluetooth causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2 Jeremy Lainé <jeremy.laine@m4x.org> - 2024-04-21 12:20 +0200

#82273 — Bug#1069301: linux-image-6.1.0-20-amd64: bluetooth causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2

FromSalvatore Bonaccorso <carnil@debian.org>
Date2024-04-19 22:10 +0200
SubjectBug#1069301: linux-image-6.1.0-20-amd64: bluetooth causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2
Message-ID<Iv2Ix-7rUm-1@gated-at.bofh.it>
Control: tags -1 + moreinfo

Hi Jeremy,

On Fri, Apr 19, 2024 at 05:37:41PM +0200, Jeremy Lainé wrote:
> Package: src:linux
> Version: 6.1.85-1
> Severity: important
> X-Debbugs-Cc: jeremy.laine@m4x.org
> 
> Dear Maintainer,
> 
> After upgrading from linux-image-6.1.0-18-amd64 to
> linux-image-6.1.0-20-amd64, bluetooth no longer works and a kernel BUG is
> visible in dmesg hinting at a memory safety issue.
> 
> It is not necessary to attempt to connect to any specific bluetooth
> device to trigger the problem, the problem arises as soon as the system
> boots.
> 
> I cannot reproduce the problem when booting back into the previous kernel
> image.

Would it be possible to do some experiments/debugging:

- Can you reproduce the issue with 6.1.85 upstream itself?

- If so can you try the current 6.1.87 (as of time of writing), does
  the issue reproduce there?

- If it's still happening, can you try to bisect the changes between
  6.1.76 and 6.1.85 to identify the culprit?

Regards,
Salvatore

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#82274 — Processed: Re: Bug#1069301: linux-image-6.1.0-20-amd64: bluetooth causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2

From"Debian Bug Tracking System" <owner@bugs.debian.org>
Date2024-04-19 22:10 +0200
SubjectProcessed: Re: Bug#1069301: linux-image-6.1.0-20-amd64: bluetooth causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2
Message-ID<Iv2Ix-7rUm-3@gated-at.bofh.it>
In reply to#82273
Processing control commands:

> tags -1 + moreinfo
Bug #1069301 [src:linux] linux-image-6.1.0-20-amd64: bluetooth causes kernel BUG - list_del corruption, (address)->prev is LIST_POISON2
Added tag(s) moreinfo.

-- 
1069301: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1069301
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#82278

FromJeremy Lainé <jeremy.laine@m4x.org>
Date2024-04-20 15:10 +0200
Message-ID<IviDE-7DBF-7@gated-at.bofh.it>
In reply to#82273

[Multipart message — attachments visible in raw view] — view raw

Hi Salvatore,

It had been a while (like 10+ years) since I built a kernel from source, so
this guide was very welcome, and the "make bindeb-pkg" target is great:

https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#s-kernel-org-package

It looks like the problem is present in the upstream kernel, I have so far
reproduced it with:

- linux 6.1.85
- linux 6.1.87

I'll start building previous patch releases until I find one that works,
but it's slow going!

Cheers,
Jeremy

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#82283

FromJeremy Lainé <jeremy.laine@m4x.org>
Date2024-04-21 12:20 +0200
Message-ID<IvCsF-7QpF-1@gated-at.bofh.it>
In reply to#82278

[Multipart message — attachments visible in raw view] — view raw

Hi Salvatore,

I've finished bisecting and the version that seems to introduce the
breakage is 6.1.83.

I tested the following upstream kernels:

- linux 6.1.80 => OK
- linux 6.1.82 => OK
- linux 6.1.83 => BUG
- linux 6.1.85 => BUG
- linux 6.1.87 => BUG

I looks like 6.1.83 introduced quite a few bluetooth changes, so I don't
know which one caused the breakage:

https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.83

What else can I do to assist?

Cheers,
Jeremy

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