linux-kernel - Re: Multiple potential races on vma->vm

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Message-ID: <5604489F.8070506@oracle.com>
Date:	Thu, 24 Sep 2015 15:01:51 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Oleg Nesterov <oleg@...hat.com>
CC:	Hugh Dickins <hughd@...gle.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Andrey Konovalov <andreyknvl@...gle.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Vlastimil Babka <vbabka@...e.cz>
Subject: Re: Multiple potential races on vma->vm_flags

On 09/24/2015 02:52 PM, Andrey Ryabinin wrote:
> Sasha, could you confirm that in your kernel mmu_notifier_mm field has
> 0x4c8 offset?
> I would use gdb for that:
> gdb vmlinux
> (gdb) p/x &(((struct mm_struct*)0)->mmu_notifier_mm)

(gdb) p/x &(((struct mm_struct*)0)->mmu_notifier_mm)
$1 = 0x4c8


Thanks,
Sasha
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