RE: KCSAN Support on ARM64 Kernel

[sgrover]

Hi Marco,

When can we expect upstream of KCSAN on kernel mainline. Any timeline?

Regards,
Sachin Grover

-----Original Message-----
From: Marco Elver <elver@xxxxxxxxxx> 
Sent: Monday, 14 October, 2019 2:40 PM
To: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: sgrover@xxxxxxxxxxxxxx; kasan-dev <kasan-dev@xxxxxxxxxxxxxxxx>; LKML <linux-kernel@xxxxxxxxxxxxxxx>; Paul E. McKenney <paulmck@xxxxxxxxxxxxx>; Will Deacon <willdeacon@xxxxxxxxxx>; Andrea Parri <parri.andrea@xxxxxxxxx>; Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>; Mark Rutland <mark.rutland@xxxxxxx>
Subject: Re: KCSAN Support on ARM64 Kernel

On Mon, 14 Oct 2019 at 10:40, Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:
>
> On Mon, Oct 14, 2019 at 7:11 AM <sgrover@xxxxxxxxxxxxxx> 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 letâs 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