From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754001Ab2GWOzM (ORCPT ); Mon, 23 Jul 2012 10:55:12 -0400 Received: from mail-lb0-f174.google.com ([209.85.217.174]:56418 "EHLO mail-lb0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753660Ab2GWOzG (ORCPT ); Mon, 23 Jul 2012 10:55:06 -0400 Message-ID: <500D659E.5090207@gmail.com> Date: Mon, 23 Jul 2012 16:54:22 +0200 From: Daniel Mack User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 MIME-Version: 1.0 To: Alan Stern CC: Sarbojit Ganguly , gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Takashi Iwai Subject: Re: Kernel Oops while disconnecting USB peripheral (always) References: In-Reply-To: X-Enigmail-Version: 1.4.3 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 23.07.2012 16:47, Alan Stern wrote: > On Mon, 23 Jul 2012, Sarbojit Ganguly wrote: >> That is why I provided two stacks, >> >> 1st one is when I tried to remove the USB hub (which connects a webcam >> + microphone) >> 2nd one is when I tried to remove an USB powered external HDD. >> >> Just to make sure whether the problem is with USB sound or the USB subsystem. > > Do you stop all the programs that are using the USB devices before > unplugging the hub? Do you unmount the USB HDD first? > > The first crash shows a problem in the snd-usb-audio driver. > > The second crash shows a problem in the VFS layer or in ext3, not in > the USB stack. I dare to doubt there are two severe bugs of that kind that are 100% reproducible. I haven't had a hotplug crash in any of the two drivers for a long time, and I use both of them extensively. I rather assume there's something else failing, probably some host controller issue that corrupts mempory? Can anyone else reproduce this maybe? Daniel