From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756024AbaCEAAm (ORCPT ); Tue, 4 Mar 2014 19:00:42 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:32971 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755945AbaCEAAk (ORCPT ); Tue, 4 Mar 2014 19:00:40 -0500 Message-ID: <53166920.709@oracle.com> Date: Tue, 04 Mar 2014 19:00:32 -0500 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Jan Kara CC: Al Viro , linux-fsdevel@vger.kernel.org, LKML , Linus Torvalds Subject: Re: fs: gpf in simple_setattr References: <52B23CEA.7090405@oracle.com> <52CD762B.7020600@oracle.com> <53123D81.6080003@oracle.com> <20140303214040.GA15265@quack.suse.cz> In-Reply-To: <20140303214040.GA15265@quack.suse.cz> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@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