linux-kernel - Re: fs: gpf in simple

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Message-ID: <53166920.709@oracle.com>
Date:	Tue, 04 Mar 2014 19:00:32 -0500
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Jan Kara <jack@...e.cz>
CC:	Al Viro <viro@...IV.linux.org.uk>, linux-fsdevel@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: fs: gpf in simple_setattr

On 03/03/2014 04:40 PM, Jan Kara wrote:
> On Sat 01-03-14 15:05:21, Sasha Levin 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...
>    Hum, can you maybe dump the name in dentry passed to simple_setattr()? Or
> maybe even the whole path using dentry_path() (but not sure if that will
> be workable on half-torn-down fs)? Maybe it will give us a hint at which
> filesystem to look...

It's just garbage, this is why I'm having a hard time making any progress with
this bug.


Thanks,
Sasha
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