linux-kernel - Re: [PATCH 00/32] kmsan: Enable on s390

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Message-ID: <CAG_fn=U+X=EE9SSb61E=QDReBXn6PGiX4gJnMfNKsTwQ6saKcA@mail.gmail.com>
Date:   Thu, 16 Nov 2023 09:42:18 +0100
From:   Alexander Potapenko <glider@...gle.com>
To:     Ilya Leoshkevich <iii@...ux.ibm.com>
Cc:     Alexander Gordeev <agordeev@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christoph Lameter <cl@...ux.com>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Marco Elver <elver@...gle.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Pekka Enberg <penberg@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>,
        kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linux-s390@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Sven Schnelle <svens@...ux.ibm.com>
Subject: Re: [PATCH 00/32] kmsan: Enable on s390

On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich <iii@...ux.ibm.com> wrote:
>
> Hi,
>
> This series provides the minimal support for Kernel Memory Sanitizer on
> s390. Kernel Memory Sanitizer is clang-only instrumentation for finding
> accesses to uninitialized memory. The clang support for s390 has already
> been merged [1].
>
> With this series, I can successfully boot s390 defconfig and
> debug_defconfig with kmsan.panic=1. The tool found one real
> s390-specific bug (fixed in master).
>
> Best regards,
> Ilya

Hi Ilya,

This is really impressive!
Can you please share some instructions on how to run KMSAN in QEMU?
I've never touched s390, but I'm assuming it should be possible?