linux-kernel - Re: [PATCH] kernel/livepatch/core: Fixed the issue of parsing failure caused by symbols carrying '-' generated by the kpatch software

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

Message-ID: <fab6d382-fad4-4d91-90e0-2d0e9dfae216@redhat.com>
Date: Mon, 28 Jul 2025 18:16:13 -0400
From: Joe Lawrence <joe.lawrence@...hat.com>
To: Li kunyu <likunyu10@....com>, jpoimboe@...nel.org, jikos@...nel.org,
 mbenes@...e.cz, pmladek@...e.com
Cc: live-patching@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernel/livepatch/core: Fixed the issue of parsing failure
 caused by symbols carrying '-' generated by the kpatch software

On 7/20/25 4:50 PM, Li kunyu wrote:
> A possible issue with the kpatch software was discovered during testing
> in the 6.6 and above kernel:
> livepatch: symbol .klp.sym.vmlinux-bringup_idt_table,5438511 has an
> incorrectly formatted name.
> 

Hmm, how did the dash get in the symbol name?  If I build a defconfig
x86_64 kernel from today, I see the "bringup_idt_table" symbol in
vmlinux, but as per Documentation/livepatch/module-elf-format.rst
shouldn't it be:

  .klp.sym.vmlinux.bringup_idt_table,<sympos>

(which btw, sympos of 5438511 seems a little bit large?)

Can you reference which kpatch-build project you are using (there are
several forks floating around, plus downstream versions) and then how to
reproduce this.

Thanks!

-- 
Joe