Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932258AbbFDOnt (ORCPT ); Thu, 4 Jun 2015 10:43:49 -0400 Received: from mail-ob0-f171.google.com ([209.85.214.171]:34558 "EHLO mail-ob0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932220AbbFDOno convert rfc822-to-8bit (ORCPT ); Thu, 4 Jun 2015 10:43:44 -0400 MIME-Version: 1.0 In-Reply-To: <55706265.8020609@message-id.googlemail.com> References: <55701655.9000605@message-id.googlemail.com> <55706265.8020609@message-id.googlemail.com> Date: Thu, 4 Jun 2015 22:43:43 +0800 Message-ID: Subject: Re: [REGRESSION] 4.1-rc6 unloading loop OOPS From: Ming Lei To: Stefan Seyfried Cc: LKML Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1614 Lines: 56 On Thu, Jun 4, 2015 at 10:36 PM, Stefan Seyfried wrote: > Hi Ming, > > Am 04.06.2015 um 12:24 schrieb Ming Lei: >> On Thu, Jun 4, 2015 at 5:11 PM, Stefan Seyfried >> wrote: > >>> I can reproduce the backtrace after a reboot once (subsequent modprobe/rmmod loop >>> do not complain anymore), but not the OOPS. >> >> One fix[1] was just merged to linus tree, and could you test that to see if your >> issue can be addressed? >> >> [1] http://marc.info/?t=143201518300001&r=1&w=2 > > I just tried current Linus' master v4.1-rc6-49-g8a7deb3 which contains > this commit and do no longer get the Warning > > Unfortunately, due to this I cannot really test your patch for the OOPS > (but the OOPS was only happening once for me, so it was not reliably > triggered). > > Thanks, things work well for me, again :-) Maybe the freed variable is still usable for you, :-) Actually I can reproduce the issue every time by just runing following command in VM: sudo modprobe loop; sleep 1; sudo rmmod loop Thanks, Ming > > Best regards, > > Stefan > -- > Stefan Seyfried > Linux Consultant & Developer -- GPG Key: 0x731B665B > > B1 Systems GmbH > Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de > GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537 -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/