Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752508AbaFDRFJ (ORCPT ); Wed, 4 Jun 2014 13:05:09 -0400 Received: from mail-qg0-f45.google.com ([209.85.192.45]:49808 "EHLO mail-qg0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752016AbaFDRFG (ORCPT ); Wed, 4 Jun 2014 13:05:06 -0400 Message-ID: <538F51BF.2030901@mutualink.net> Date: Wed, 04 Jun 2014 13:05:03 -0400 From: Mike Remski User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 MIME-Version: 1.0 To: Johan Hovold CC: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Subject: Re: ftdi_sio BUG: NULL pointer dereference References: <20140602164957.GC13790@localhost> <538CB049.9020805@mutualink.net> <20140602174630.GD13790@localhost> <538DA0BD.5080208@mutualink.net> <20140604141937.GA11160@localhost> <538F2D51.2010508@mutualink.net> <20140604145200.GB11160@localhost> <538F3360.40407@mutualink.net> <20140604150938.GD11160@localhost> <538F3E3B.5080906@mutualink.net> <20140604160000.GF11160@localhost> In-Reply-To: <20140604160000.GF11160@localhost> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/04/2014 12:00 PM, Johan Hovold wrote: > On Wed, Jun 04, 2014 at 11:41:47AM -0400, Mike Remski wrote: >> Ok, had a chance to try the cdc-acm; yes it's the ancient one that is >> in the base install of CentOS 6.4 (2.6.32-71.29.1 centos patched). I'm >> hitting something similar; I noticed there where a few commits for NULL >> pointer dereferences in cdc-acm.c. >> >> I'll poke into this a bit (yes, I know try a newer kernel, etc) and let >> you know what I find (or perhaps this looks similar to something already >> seen?). This device is the same as the original ftdi crash, 1.2 is the >> same interface with bNumEndpoints == 0. >> >> Jun 4 11:35:20 nicA91A84 kernel: cdc_acm 5-2:1.2: This device cannot do >> calls on its own. It is not a modem. >> Jun 4 11:35:20 nicA91A84 kernel: BUG: unable to handle kernel NULL >> pointer dereference at 00000004 >> Jun 4 11:35:20 nicA91A84 kernel: IP: [] >> acm_probe+0x44e/0x127c [cdc_acm] >> Jun 4 11:35:20 nicA91A84 kernel: *pdpt = 00000000354eb001 *pde = >> 000000007f003067 >> Jun 4 11:35:20 nicA91A84 kernel: Oops: 0000 [#1] SMP >> Jun 4 11:35:20 nicA91A84 kernel: last sysfs file: >> /sys/devices/pci0000:00/0000:00:1d.0/usb5/5-2/product > Yeah, you really need to update your kernel. You'll definitely need at > least commit 99f347caa456 ("USB: CDC ACM: Fix NULL pointer > dereference"). > > No more reports until you've tried a recent kernel, ok? ;) > > Johan Device in question does not cause kernel crash when using the cdc-acm driver on a Fedora 19 system running Fedora kernel 3.9.5-301. Thanks for all the help, I'll take care of my ancient kernels. -- Office: (978)401-4032 (x123 internally) Cell: (603) 759-6953 -- 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/