linux-kernel - Re: KMSAN: uninit-value in mpol_rebind

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Date:   Fri, 4 Jan 2019 17:28:02 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     Dmitry Vyukov <dvyukov@...gle.com>,
        syzbot <syzbot+b19c2dc2c990ea657a71@...kaller.appspotmail.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Alexander Potapenko <glider@...gle.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>, linux@...inikbrodowski.net,
        Michal Hocko <mhocko@...e.com>,
        David Rientjes <rientjes@...gle.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        xieyisheng1@...wei.com, zhong jiang <zhongjiang@...wei.com>
Subject: Re: KMSAN: uninit-value in mpol_rebind_mm

On Fri, 4 Jan 2019 09:50:31 +0100 Vlastimil Babka <vbabka@...e.cz> wrote:

> > Yes, it doesn't and it's not trivial to do. The tool reports uses of
> > unint _values_. Values don't necessary reside in memory. It can be a
> > register, that come from another register that was calculated as a sum
> > of two other values, which may come from a function argument, etc.
> 
> I see. BTW, the patch I sent will be picked up for testing, or does it
> have to be in mmotm/linux-next first?

I grabbed it.  To go further we'd need a changelog, a signoff,
description of testing status, reviews, a Fixes: and perhaps a
cc:stable ;)