linux-kernel - Re: WARNING: modpost: EXPORT symbol "…" [vmlinux] version generation failed, symbol will not be versioned./"…" […] has no CRC!

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAFULd4ZkkMjPh++2N-TVOabVcs_HhKb-4Qrgs16vnW2LrhpQzw@mail.gmail.com>
Date: Sun, 6 Apr 2025 08:48:13 +0200
From: Uros Bizjak <ubizjak@...il.com>
To: Paul Menzel <pmenzel@...gen.mpg.de>
Cc: Andrew Morton <akpm@...ux-foundation.org>, regressions@...ts.linux.dev, 
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: WARNING: modpost: EXPORT symbol "…" [vmlinux] version generation failed, symbol will not be versioned./"…" […] has no CRC!

On Sat, Apr 5, 2025 at 11:00 AM Paul Menzel <pmenzel@...gen.mpg.de> wrote:
>
> #regzbot introduced: 6a367577153acd9b432a5340fb10891eeb7e10f1
>
>
> Dear Linux folks,
>
>
> If I didn’t screw up `git bisect`, then commit 6a367577153a (percpu/x86:
> enable strict percpu checks via named AS qualifiers) [1] causes the
> build warnings below:
>
>      $ make olddefconfig && make -j128
>      […]
>      WARNING: modpost: EXPORT symbol "xen_vcpu_id" [vmlinux] version
> generation failed, symbol will not be versioned.
>      Is "xen_vcpu_id" prototyped in <asm/asm-prototypes.h>?
>      WARNING: modpost: EXPORT symbol "irq_stat" [vmlinux] version
> generation failed, symbol will not be versioned.
>      Is "irq_stat" prototyped in <asm/asm-prototypes.h>?
>      […]
>      WARNING: modpost: EXPORT symbol "__irq_regs" [vmlinux] version
> generation failed, symbol will not be versioned.
>      Is "__irq_regs" prototyped in <asm/asm-prototypes.h>?
>      WARNING: modpost: EXPORT symbol "radix_tree_preloads" [vmlinux]
> version generation failed, symbol will not be versioned.
>      Is "radix_tree_preloads" prototyped in <asm/asm-prototypes.h>?
>      WARNING: modpost: "pcpu_hot"
> [arch/x86/events/intel/intel-uncore.ko] has no CRC!
>      WARNING: modpost: "numa_node"
> [arch/x86/events/intel/intel-uncore.ko] has no CRC!
>      […]

The patch at  [1] also fixes this issue. Actually, this warning is the
root cause of your previous report [2] and is due to genksyms not
being prepared for new keywords.

So, either genksyms should be enhanced or a workaround [1] should be used..

[1] https://lore.kernel.org/lkml/20250404102535.705090-1-ubizjak@gmail.com/
[2] https://lore.kernel.org/lkml/81a25a60-de78-43fb-b56a-131151e1c035@molgen.mpg.de/

Uros.