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Date: Tue, 22 May 2018 14:07:35 -0700
From: Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH v2 2/2] kasan: fix memory hotplug during boot
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To: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: David Hildenbrand <david@redhat.com>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Alexander Potapenko <glider@google.com>, Dmitry Vyukov <dvyukov@google.com>, "open list:KASAN" <kasan-dev@googlegroups.com>

On Tue, 22 May 2018 22:50:12 +0300 Andrey Ryabinin <aryabinin@virtuozzo.com> wrote:

> 
> 
> On 05/22/2018 07:36 PM, David Hildenbrand wrote:
> > On 22.05.2018 18:26, Andrey Ryabinin wrote:
> >>
> >>
> >> On 05/22/2018 01:07 PM, David Hildenbrand wrote:
> >>> Using module_init() is wrong. E.g. ACPI adds and onlines memory before
> >>> our memory notifier gets registered.
> >>>
> >>> This makes sure that ACPI memory detected during boot up will not
> >>> result in a kernel crash.
> >>>
> >>> Easily reproducable with QEMU, just specify a DIMM when starting up.
> >>
> >>          reproducible
> >>>
> >>> Signed-off-by: David Hildenbrand <david@redhat.com>
> >>> ---
> >>
> >> Fixes: fa69b5989bb0 ("mm/kasan: add support for memory hotplug")
> >> Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
> >> Cc: <stable@vger.kernel.org>
> > 
> > Think this even dates back to:
> > 
> > 786a8959912e ("kasan: disable memory hotplug")
> > 
> 
> Indeed.

Is a backport to -stable justified for either of these patches?