From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030363AbXAKNVa (ORCPT ); Thu, 11 Jan 2007 08:21:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030364AbXAKNVa (ORCPT ); Thu, 11 Jan 2007 08:21:30 -0500 Received: from smtp-out001.kontent.com ([81.88.40.215]:46716 "EHLO smtp-out.kontent.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030363AbXAKNV3 (ORCPT ); Thu, 11 Jan 2007 08:21:29 -0500 From: Oliver Neukum To: linux-usb-devel@lists.sourceforge.net Subject: Re: [linux-usb-devel] 2.6.20-rc4: null pointer deref in khubd Date: Thu, 11 Jan 2007 14:21:47 +0100 User-Agent: KMail/1.8 Cc: Pavel Machek , Andrew Morton , Greg KH , kernel list References: <20070110104937.GA32112@elf.ucw.cz> <200701101653.57929.oneukum@suse.de> <20070110203809.GA6378@ucw.cz> In-Reply-To: <20070110203809.GA6378@ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200701111421.48125.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Am Mittwoch, 10. Januar 2007 21:38 schrieb Pavel Machek: > Hi! > > > > usb 2-1: new full speed USB device using uhci_hcd and address 68 > > > usb 2-1: USB disconnect, address 68 > > > usb 2-1: unable to read config index 0 descriptor/start > > > usb 2-1: chopping to 0 config(s) > > > > Does anybody know a legitimate reasons a device should have > > 0 configurations? Independent of the reason of this bug, should we disallow > > such devices and error out? > > It is not bad device, btw, but extremely flakey connector. Bug is > random :-(, and machine is smp, so it might even be a race. With that config option, there's a race even on UP. probe() can sleep. Regards Oliver