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Message-ID: <5401DFA7.6080201@oracle.com>
Date: Sat, 30 Aug 2014 10:28:55 -0400
From: Sasha Levin <sasha.levin@...cle.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
CC: Andrew Morton <akpm@...ux-foundation.org>,
Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
Joonsoo Kim <iamjoonsoo.kim@....com>,
Hugh Dickins <hughd@...gle.com>,
Johannes Weiner <hannes@...xchg.org>,
Dave Jones <davej@...hat.com>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: mm: kernel BUG at mm/rmap.c:530
On 08/20/2014 10:02 AM, Kirill A. Shutemov wrote:
> Sasha Levin wrote:
>> > Hi all,
>> >
>> > While fuzzing with trinity inside a KVM tools guest running the latest -next
>> > kernel, I've stumbled on the following spew:
>> >
>> > [ 2581.180086] kernel BUG at mm/rmap.c:530!
> Page is mapped where it shouldn't be. Or vma/struct page/pgtable is corrupted.
> Basically, I have no idea what happend :-P
>
> We really should dump page and vma info there. It's strange we don't have
> dump_vma() helper yet.
>
Okay, so the dump_vma() helper shows:
[ 736.842506] vma ffff8808436fdc00 start (null) end (null)
[ 736.842506] next (null) prev (null) mm (null)
[ 736.842506] prot 0 anon_vma (null) vm_ops (null)
[ 736.842506] pgoff 0 file (null) private_data (null)
[ 736.846670] flags: 0x0(
Thanks,
Sasha
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