linux-kernel - Re: GPF in numa_vma

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Message-ID: <CA+1xoqc2DoswwM737QkkdeY0gqoqFor4RSnThTqMiVT8YDK-mQ@mail.gmail.com>
Date:	Sat, 26 May 2012 21:51:56 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	a.p.zijlstra@...llo.nl, mingo@...nel.org
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: GPF in numa_vma_unlink

On Wed, May 23, 2012 at 4:14 PM, Sasha Levin <levinsasha928@...il.com> wrote:
> Hi all,
>
> During fuzzing with trinity inside a KVM tools guest, using latest linux-next, I've stumbled on the following:

So it can be fixed by getting the 'ng_put(ng)' to go under ng lock,
but since the locking (and the locking related comments) in
kernel/sched/numa.c look very confusing, I'm not sure if that's the
right solution.
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