linux-kernel - Re: v6.13-rc1: Internal error: Oops - Undefined instruction: 0000000002000000 [#1] SMP

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Message-ID: <86v7vrsvzh.wl-maz@kernel.org>
Date: Tue, 10 Dec 2024 09:55:30 +0000
From: Marc Zyngier <maz@...nel.org>
To: Vitaly Chikunov <vt@...linux.org>
Cc: linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev,
	Oliver Upton <oliver.upton@...ux.dev>,
	Shameerali Kolothum Thodi <shameerali.kolothum.thodi@...wei.com>,
	Will Deacon <will@...nel.org>,
	"james.morse@....com" <james.morse@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Mark Rutland <mark.rutland@....com>,
	"Wangzhou (B)" <wangzhou1@...ilicon.com>,
	Gleb Fotengauer-Malinovskiy <glebfm@...linux.org>
Subject: Re: v6.13-rc1: Internal error: Oops - Undefined instruction: 0000000002000000 [#1] SMP

On Tue, 10 Dec 2024 02:51:27 +0000,
Vitaly Chikunov <vt@...linux.org> wrote:
> 
> On Fri, Dec 06, 2024 at 11:56:02PM +0300, Vitaly Chikunov wrote:
> > On Wed, Dec 04, 2024 at 08:51:26AM +0000, Marc Zyngier wrote:
> > > On Tue, 03 Dec 2024 22:14:53 +0000,
> > > Vitaly Chikunov <vt@...linux.org> wrote:
> > > > On Tue, Dec 03, 2024 at 10:03:11AM +0000, Shameerali Kolothum Thodi wrote:
> > > 
> > > Mark has described what the problem is likely to be. 6.6-stable needs
> > > to have 6685f5d572c22e10 backported, and it probably should have been
> > > Cc: to stable. Can you please apply the following patch to your *host*
> > > machine and retest?
> > 
> > We tested the host with this patch applied over 6.6.63 and 6.13-rc1
> > guest does not Oops anymore.
> > 
> > I'd suggest this is also get backported to 6.12.y branch.
> 
> Please, can someone backport this patch to v6.12 and send to stable? This
> would be really useful to have this fixed and it's noted this is a
> critical bug.

Look: it took you a few good days to simply *report* that the hack I
gave you was helping. Surely you can similarly wait for a few days for
the interested parties to spin proper patches and *test* them?

And if you really cannot wait, feel free to backport this change to
whatever stable release you feel needs to be fixed and post the
result.  I promise that I will review it. After all, you are so far
the only person with both the HW and the problem.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.