linux-kernel - Re: fs: gpf in simple

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Date:	Sun, 02 Mar 2014 21:01:47 -0500
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Al Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: fs: gpf in simple_setattr

On 03/01/2014 10:35 PM, Linus Torvalds wrote:
> On Sat, Mar 1, 2014 at 2:05 PM, Sasha Levin <sasha.levin@...cle.com> wrote:
>> ping again?
>>
>> I've been working on it, but don't see an obvious issue.
>>
>> It does look like an access to invalid memory easily doable from userspace,
>> so it should probably get fixed soon...
>
> It doesn't happen in mainline? Any possibility that you could try to bisect it?

It might be in mainline, it just happens once in a couple of days and since I'm not usually fuzzing 
mainline I can't say for sure.

I've tried bisecting but since I don't have a reliable way to reproduce it the bisection goes wrong 
pretty fast.

I've tried adding some debug code in, which clearly suggests that the object is gone, but I can't 
pinpoint to where it disappears.


Thanks,
Sasha

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