linux-kernel - Re: Regression with patch "kbuild: rpm-pkg: Generate debuginfo package manually"

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Message-ID: <20260209222550.GA1844976@ax162>
Date: Mon, 9 Feb 2026 15:25:50 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Steve French <smfrench@...il.com>
Cc: Nicolas Schier <nsc@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	Holger Kiehl <Holger.Kiehl@....de>
Subject: Re: Regression with patch "kbuild: rpm-pkg: Generate debuginfo
 package manually"

On Thu, Feb 05, 2026 at 05:24:16PM -0700, Nathan Chancellor wrote:
> Hi Steve,
> 
> On Thu, Feb 05, 2026 at 05:56:20PM -0600, Steve French wrote:
> > I noticed with the recent patch below:
> > 
> >     commit 62089b804895e845f82e132ea9d46a1fc53ed5a7
> >     Author: Nathan Chancellor <nathan@...nel.org>
> >     Date:   Wed Jan 21 15:29:15 2026 -0700
> > 
> >        kbuild: rpm-pkg: Generate debuginfo package manually
> > 
> > that all of our test builds were failing to build kernel RPMs for
> > 6.19-rc8 and later (see e.g.
> > http://osmb311-linux-testing.southcentralus.cloudapp.azure.com/#/builders/1/builds/99/steps/9/logs/stdio).
> 
> Sorry for the breakage :(
> 
> Can you provide me with the .config? I want to see if I can reproduce
> this locally.
...
> I wonder if we are relying on something in a newer rpm version that is
> not available on an older version that is present in RHEL.

Ooookay, after much gnashing of teeth investigating different
environments and such, it looks like my change implicitly relies on some
improvements to debuginfo package generation that are in rpm 4.20 or
newer (Fedora 41 or newer), which is why I have not seen any issues up
until this point. I am not entirely sure why yet though but I wanted to
provide a small update that I am still looking into this. I plan to send
the main 7.0 Kbuild pull request then I should be able to focus more
intently on this.

Cheers,
Nathan