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

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Message-ID: <f8ab4b21-0afc-4956-a324-12c0c67bb5de@molgen.mpg.de>
Date: Thu, 3 Apr 2025 14:30:21 +0200
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: 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, Uros Bizjak <ubizjak@...il.com>
Cc: 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`

#regzbot ^introduced: 6a367577153a

[To: +Uros, Cc: +Nadav, +Andrew]


Dear Linux folks,


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

Kind regards,

Paul


$ git bisect log
git bisect start
# status: waiting for both good and bad commits
# good: [08733088b566b58283f0f12fb73f5db6a9a9de30] Merge tag 
'rust-fixes-6.15-merge' of 
git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux
git bisect good 08733088b566b58283f0f12fb73f5db6a9a9de30
# status: waiting for bad commit, 1 good commit known
# bad: [acc4d5ff0b61eb1715c498b6536c38c1feb7f3c1] Merge tag 
'net-6.15-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
git bisect bad acc4d5ff0b61eb1715c498b6536c38c1feb7f3c1
# bad: [2cd5769fb0b78b8ef583ab4c0015c2c48d525dac] Merge tag 
'driver-core-6.15-rc1' of 
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
git bisect bad 2cd5769fb0b78b8ef583ab4c0015c2c48d525dac
# bad: [0e2f80afcfa699ce722c01afc9286a942bd57211] fs/dax: ensure all 
pages are idle prior to filesystem unmount
git bisect bad 0e2f80afcfa699ce722c01afc9286a942bd57211
# bad: [5b47c02967ab770aa7661c8863a21b2fd59e35ff] mm/hugetlb: convert 
cmdline parameters from setup to early
git bisect bad 5b47c02967ab770aa7661c8863a21b2fd59e35ff
# bad: [94ba17adaba0f651fdcf745c8891a88e2e028cfa] mm/damon: avoid 
applying DAMOS action to same entity multiple times
git bisect bad 94ba17adaba0f651fdcf745c8891a88e2e028cfa
# bad: [f495bd7e0d9bd00c9a76c49f792b532bbb0efd0a] mm/rmap: keep mapcount 
untouched for device-exclusive entries
git bisect bad f495bd7e0d9bd00c9a76c49f792b532bbb0efd0a
# bad: [9b2f764933eb5e3ac9ebba26e3341529219c4401] mm/huge_memory: allow 
split shmem large folio to any lower order
git bisect bad 9b2f764933eb5e3ac9ebba26e3341529219c4401
# bad: [1c81f1a699263aeae9aa1ac777058846c546e3c0] memcg: use 
OFP_PEAK_UNSET instead of -1
git bisect bad 1c81f1a699263aeae9aa1ac777058846c546e3c0
# good: [8a3c392388c6a6e0c8937a24712b630ec9ac7016] percpu: use 
TYPEOF_UNQUAL() in variable declarations
git bisect good 8a3c392388c6a6e0c8937a24712b630ec9ac7016
# good: [6cea5ae714ba47ea4807d15903baca9857a450e6] percpu: repurpose 
__percpu tag as a named address space qualifier
git bisect good 6cea5ae714ba47ea4807d15903baca9857a450e6