linux-kernel - Re: BUG: kernel NULL pointer dereference, address: 0000000000000000

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Message-ID: <CADVatmNzTyUAr8UBvm6pHFsKz8xZpqUXh5NQR641JXsCWaPg8g@mail.gmail.com>
Date: Mon, 26 Jan 2026 18:56:52 +0000
From: Sudip Mukherjee <sudipm.mukherjee@...il.com>
To: Salvatore Bonaccorso <carnil@...ian.org>
Cc: Paul Menzel <pmenzel@...gen.mpg.de>, 
	Sudip Mukherjee <sudip.mukherjee@...ethink.co.uk>, linux-kernel@...r.kernel.org, 
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, regressions@...ts.linux.dev, 
	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, 
	Hans de Goede <hansg@...nel.org>, Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
	Giuseppe Sacco <eppesuig@...ian.org>
Subject: Re: BUG: kernel NULL pointer dereference, address: 0000000000000000

Hi Salvatore,

On Thu, 22 Jan 2026 at 09:59, Salvatore Bonaccorso <carnil@...ian.org> wrote:
>
> Hi Sudip,
>
> On Sat, Jan 03, 2026 at 11:33:47AM +0000, Sudip Mukherjee wrote:
> > On Sat, Jan 03, 2026 at 12:01:19PM +0600, Paul Menzel wrote:
> > > Dear Salvatore,
> > >
> > >
> > > Thank you for the follow-up.
> > >
<snip>
>
> We had another report (https://bugs.debian.org/1126128_ but the
> problem remains here as well the reproducibilty. Uppon several reboots
> only the first one so far showed the problem and was not reproducible
> afterwards.

I was going to post the patch today but since you have asked the
reporter of the last bug to test it so lets wait for few more days.

About the problem showing on the first boot, does that mean that its
only seen on a cold boot ? and not seen on reboots (reboots without
power cycle) ?
Can it be reproduced if the system is powered-off and then powering it on ?


-- 
Regards
Sudip