linux-kernel - Re: New warning `cryptd: no symbol version for this_cpu

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Message-ID: <dfb96de9-b28a-4eac-ac73-88bfb9c44245@molgen.mpg.de>
Date: Thu, 3 Apr 2025 15:20:47 +0200
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Uros Bizjak <ubizjak@...il.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 x86@...nel.org, LKML <linux-kernel@...r.kernel.org>,
 regressions@...ts.linux.dev, Brian Gerst <brgerst@...il.com>,
 Nadav Amit <nadav.amit@...il.com>, Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: New warning `cryptd: no symbol version for this_cpu_off`

Dear Uros,


Am 03.04.25 um 15:14 schrieb Uros Bizjak:
> On Thu, Apr 3, 2025 at 2:30 PM Paul Menzel <pmenzel@...gen.mpg.de> wrote:
>>
>> #regzbot ^introduced: 6a367577153a
>>
>> [To: +Uros, Cc: +Nadav, +Andrew]

>> Am 03.04.25 um 09:35 schrieb Paul Menzel:
>>
>>> On the Intel Kaby Lake laptop Dell XPS 13 9360, updating from
>>> 6.14.0-11270-g08733088b566 to 6.14.0-12456-gacc4d5ff0b61, Linux logs the
>>> new warning below:
>>>
>>>       cryptd: no symbol version for this_cpu_off
>>>
>>> I haven’t bisected it, but could it be commit 06aa03056f90 (x86/smp:
>>> Move this_cpu_off to percpu hot section). It says to have no functional
>>> change though.
>>
>> `git bisect` led to commit 6a367577153a (percpu/x86: enable strict
>> percpu checks via named AS qualifiers).
>>
>>       $ git bisect start
>>       $ git bisect good 08733088b566
>>       $ git bisect bad acc4d5ff0b61
> 
> Can you please post your .config?

Sorry, I didn’t attach it right away. It’s attached now.


Kind regards,

Paul


PS: I am also able to reproduce it in QEMU, and used that for bisecting 
the issue:

     qemu-system-x86_64 -M q35 -enable-kvm -cpu host -kernel 
/boot/vmlinuz-6.14.0-rc6-00021-g6cea5ae714ba -append "console=ttyS0 
root=/dev/sda1" -initrd /boot/initrd.img-6.14.0-rc6-00021-g6cea5ae714ba 
-hda /dev/shm/qemu-debian.img -nographic

The above was a good build without the warning.
View attachment "config-6.14.0-12456-gacc4d5ff0b61" of type "text/plain" (205694 bytes)