linux-kernel - Re: KCSAN Support on ARM64 Kernel

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Message-ID: <CANpmjNPVK00wsrpcVPFjudpqE-4-AVnZY0Pk-WMXTtqZTMXoOw@mail.gmail.com>
Date:   Mon, 14 Oct 2019 11:31:56 +0200
From:   Marco Elver <elver@...gle.com>
To:     sgrover@...eaurora.org
Cc:     Dmitry Vyukov <dvyukov@...gle.com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "Paul E. McKenney" <paulmck@...ux.ibm.com>,
        Will Deacon <willdeacon@...gle.com>,
        Andrea Parri <parri.andrea@...il.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: KCSAN Support on ARM64 Kernel

Hi Sachin,

My plan was to send patches upstream within the month.

Thanks,
-- Marco

On Mon, 14 Oct 2019 at 11:30, <sgrover@...eaurora.org> wrote:
>
> Hi Marco,
>
> When can we expect upstream of KCSAN on kernel mainline. Any timeline?
>
> Regards,
> Sachin Grover
>
> -----Original Message-----
> From: Marco Elver <elver@...gle.com>
> Sent: Monday, 14 October, 2019 2:40 PM
> To: Dmitry Vyukov <dvyukov@...gle.com>
> Cc: sgrover@...eaurora.org; kasan-dev <kasan-dev@...glegroups.com>; LKML <linux-kernel@...r.kernel.org>; Paul E. McKenney <paulmck@...ux.ibm.com>; Will Deacon <willdeacon@...gle.com>; Andrea Parri <parri.andrea@...il.com>; Alan Stern <stern@...land.harvard.edu>; Mark Rutland <mark.rutland@....com>
> Subject: Re: KCSAN Support on ARM64 Kernel
>
> On Mon, 14 Oct 2019 at 10:40, Dmitry Vyukov <dvyukov@...gle.com> wrote:
> >
> > On Mon, Oct 14, 2019 at 7:11 AM <sgrover@...eaurora.org> wrote:
> > >
> > > Hi Dmitry,
> > >
> > > I am from Qualcomm Linux Security Team, just going through KCSAN and found that there was a thread for arm64 support (https://lkml.org/lkml/2019/9/20/804).
> > >
> > > Can you please tell me if KCSAN is supported on ARM64 now? Can I just rebase the KCSAN branch on top of our let’s say android mainline kernel, enable the config and run syzkaller on that for finding race conditions?
> > >
> > > It would be very helpful if you reply, we want to setup this for finding issues on our proprietary modules that are not part of kernel mainline.
> > >
> > > Regards,
> > >
> > > Sachin Grover
> >
> > +more people re KCSAN on ARM64
>
> KCSAN does not yet have ARM64 support. Once it's upstream, I would expect that Mark's patches (from repo linked in LKML thread) will just cleanly apply to enable ARM64 support.
>
> Thanks,
> -- Marco
>