From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sasha Levin <sasha.levin@oracle.com>
Subject: Re: fs: gpf in simple_setattr
Date: Tue, 04 Mar 2014 19:00:32 -0500
Message-ID: <53166920.709@oracle.com>
References: <52B23CEA.7090405@oracle.com> <52CD762B.7020600@oracle.com> <53123D81.6080003@oracle.com> <20140303214040.GA15265@quack.suse.cz>
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Cc: Al Viro <viro@ZenIV.linux.org.uk>, linux-fsdevel@vger.kernel.org,
	LKML <linux-kernel@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>
To: Jan Kara <jack@suse.cz>
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <20140303214040.GA15265@quack.suse.cz>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: linux-fsdevel.vger.kernel.org

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