linux-kernel - Re: [platform/x86] 84c2f235ad BUG: KASAN: null-ptr-deref on address 0000000000000008

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Message-ID: <20170227052356.GJ3807@marvin.atrad.com.au>
Date:   Mon, 27 Feb 2017 15:53:56 +1030
From:   Jonathan Woithe <jwoithe@...t42.net>
To:     Fengguang Wu <fengguang.wu@...el.com>
Cc:     Alan Jenkins <alan-jenkins@...fmail.co.uk>,
        kernel test robot <xiaolong.ye@...el.com>,
        Darren Hart <dvhart@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org,
        Micha?? K??pie?? <kernel@...pniu.pl>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, lkp@...org
Subject: Re: [platform/x86] 84c2f235ad BUG: KASAN: null-ptr-deref on address
 0000000000000008

On Mon, Feb 27, 2017 at 12:58:40PM +0800, Fengguang Wu wrote:
> Here is another bisect result. The attached reproduce-* script may
> help debug the issue.

Thanks for this.  FYI the cause of this issue is already understood (refer
to previous linux-platform-driver ML discussions).  The relevant part of the
patch series (08/10) has been (or will be) reverted by Andy to resolve the
problem for the moment (as per my earlier email).  The issue that part 08/10
was aiming to fix will be addressed in a more complete way in a follow up
patch series from Michael in due course as explained in my Reviewed-by
comment.

Regards
  jonathan