linux-kernel - Re: btrfs extents related oops.

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Message-ID: <53E0E1AE.3050705@fb.com>
Date:	Tue, 5 Aug 2014 09:52:46 -0400
From:	Chris Mason <clm@...com>
To:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: btrfs extents related oops.

On 08/05/2014 09:47 AM, Chris Mason wrote:
> On 08/04/2014 09:57 PM, Dave Jones wrote:
>> On Mon, Aug 04, 2014 at 09:28:45PM -0400, Dave Jones wrote:
>>  > Possibly related to some changes I've been making to my fuzz tester today
>>  > to operate on the same file from multiple threads.
>>  > This was on v3.16-829-g98959948a7ba, but probably exists on earlier trees too
>>  > given the lack of btrfs specific commits so far this merge window.
>>
>> reproducer:
>>
>> trinity -q -l off -c lseek -c write
>>
>> (Things also go very, very bad if you then try to umount that
>>  partition - endless oopses, too mangled to parse).
> 
> So we're fuzzing lseek and btrfs goes crazy?  Looking.

Ugh, that's wrong in exciting ways.  Thanks Dave, I'll test a patch with
trinity and get it in.

-chris
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