linux-kernel - Re: [PATCH v4 00/12] mm/kasan: make kasan=on|off work for all three modes

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Message-ID: <edd6e350-5482-4551-aa94-e1ab8d2f9774@gmail.com>
Date: Wed, 24 Dec 2025 13:25:50 +0100
From: Andrey Ryabinin <ryabinin.a.a@...il.com>
To: Baoquan He <bhe@...hat.com>, Andrey Konovalov <andreyknvl@...il.com>
Cc: linux-mm@...ck.org, glider@...gle.com, dvyukov@...gle.com,
 vincenzo.frascino@....com, akpm@...ux-foundation.org,
 kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
 kexec@...ts.infradead.org, elver@...gle.com, sj@...nel.org,
 lorenzo.stoakes@...cle.com, snovitoll@...il.com, christophe.leroy@...roup.eu
Subject: Re: [PATCH v4 00/12] mm/kasan: make kasan=on|off work for all three
 modes



On 12/24/25 4:28 AM, Baoquan He wrote:
> Hi Andrey,
> 
> On 12/04/25 at 05:38pm, Andrey Konovalov wrote:
>> On Fri, Nov 28, 2025 at 4:33 AM Baoquan He <bhe@...hat.com> wrote:
>>>
> ...snip...
>>> Testing:
>>> ========
>>> - Testing on x86_64 and arm64 for generic mode passed when kasan=on or
>>>   kasan=off.
>>>
>>> - Testing on arm64 with sw_tags mode passed when kasan=off is set. But
>>>   when I tried to test sw_tags on arm64, the system bootup failed. It's
>>>   not introduced by my patchset, the original code has the bug. I have
>>>   reported it to upstream.
>>>   - System is broken in KASAN sw_tags mode during bootup
>>>     - https://lore.kernel.org/all/aSXKqJTkZPNskFop@MiWiFi-R3L-srv/T/#u
>>
>> This will hopefully be fixed soon, so you'll be able to test.
> 
> Do you have the patch link of the fix on sw_tags breakage?

I think this one  should fix it - https://lkml.kernel.org/r/cover.1765978969.git.m.wieczorretman@pm.me

> 
> I am organizing patches and testing them for reposting, but still see
> the sw_tags breakage during boot on arm64 system. If you have the
> pointer about the fix, I can grab the possible unmature code change to
> make sw_tags mode work to finish my testing.
> 
> Thanks
> Baoquan
>