Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753535AbYJ2JlF (ORCPT ); Wed, 29 Oct 2008 05:41:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752880AbYJ2Jky (ORCPT ); Wed, 29 Oct 2008 05:40:54 -0400 Received: from smtp-vbr15.xs4all.nl ([194.109.24.35]:4765 "EHLO smtp-vbr15.xs4all.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752788AbYJ2Jkx (ORCPT ); Wed, 29 Oct 2008 05:40:53 -0400 Date: Wed, 29 Oct 2008 10:40:49 +0100 From: Folkert van Heusden To: Kay Sievers Cc: linux-kernel@vger.kernel.org Subject: Re: [2.6.26] kobject_add_internal failed for 2:0 with -EEXIST / unable to handle kernel NULL pointer dereference in sysfs_create_link Message-ID: <20081029094041.GO11214@vanheusden.com> References: <20081028151157.GI11214@vanheusden.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: www.unixexpert.nl X-Chameleon-Return-To: folkert@vanheusden.com X-Xfmail-Return-To: folkert@vanheusden.com X-Phonenumber: +31-6-41278122 X-URL: http://www.vanheusden.com/ X-PGP-KeyID: 1F28D8AE X-GPG-fingerprint: AC89 09CE 41F2 00B4 FCF2 B174 3019 0E8C 1F28 D8AE X-Key: http://pgp.surfnet.nl:11371/pks/lookup?op=get&search=0x1F28D8AE Read-Receipt-To: Reply-By: Wed Oct 29 12:57:18 CET 2008 X-Message-Flag: Want to extend your PGP web-of-trust? Coordinate a key-signing at www.biglumber.com User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3776 Lines: 82 > > While running my http://vanheusden.com/pyk/ script (which randomly > > inserts and removes modules) I triggered the folllowing oops in a 2.6.26 > > kernel on an IBM xSeries 260. This oops (in fact no oops at all) did not > > get triggered in a 2.6.18 kernel on that system. > > > > [ 42.507375] FDC 0 is a National Semiconductor PC87306 > > [ 42.509057] kobject_add_internal failed for 2:0 with -EEXIST, don't try to register things with the same name in the same directory. > > [ 42.509291] Pid: 5301, comm: modprobe Not tainted 2.6.26-1-amd64 #1 > > [ 42.509431] > > [ 42.509433] Call Trace: > > [ 42.509685] [] kobject_add_internal+0x13f/0x17e > > [ 42.509823] [] kobject_add+0x74/0x7c > > [ 42.509969] [] sysfs_addrm_finish+0x19/0x1ea > > [ 42.510141] [] sysfs_find_dirent+0x1b/0x2f > > [ 42.510331] [] create_dir+0x5a/0x87 > > [ 42.510466] [] kobject_get+0x12/0x17 > > [ 42.510614] [] get_device+0x17/0x20 > > [ 42.510754] [] device_add+0x9b/0x53f > > [ 42.510915] [] kobject_init+0x41/0x69 > > [ 42.511374] [] device_create_vargs+0x9a/0xc6 > > [ 42.511519] [] bdi_register+0x57/0xb4 > > Looks like bdi sees two devices with the same devnum, or didn't > cleanup an old entry. > What does: ls -l "/sys/class/bdi/" print? The following: folkert@debiantesthw:~$ ls -l /sys/class/bdi/ total 0 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:0 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:1 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:10 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:11 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:12 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:13 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:14 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:15 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:2 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:3 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:4 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:5 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:6 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:7 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:8 drwxr-xr-x 3 root root 0 2008-10-28 18:32 1:9 drwxr-xr-x 3 root root 0 2008-10-28 18:32 2:0 drwxr-xr-x 3 root root 0 2008-10-28 18:32 2:1 drwxr-xr-x 3 root root 0 2008-10-28 18:32 254:0 drwxr-xr-x 3 root root 0 2008-10-28 18:32 254:1 drwxr-xr-x 3 root root 0 2008-10-28 18:32 254:2 drwxr-xr-x 3 root root 0 2008-10-28 18:32 254:3 drwxr-xr-x 3 root root 0 2008-10-28 18:32 254:4 drwxr-xr-x 3 root root 0 2008-10-28 18:32 254:5 drwxr-xr-x 3 root root 0 2008-10-28 18:32 3:0 drwxr-xr-x 3 root root 0 2008-10-29 11:39 7:0 drwxr-xr-x 3 root root 0 2008-10-29 11:39 7:1 drwxr-xr-x 3 root root 0 2008-10-29 11:39 7:2 drwxr-xr-x 3 root root 0 2008-10-29 11:39 7:3 drwxr-xr-x 3 root root 0 2008-10-29 11:39 7:4 drwxr-xr-x 3 root root 0 2008-10-29 11:39 7:5 drwxr-xr-x 3 root root 0 2008-10-29 11:39 7:6 drwxr-xr-x 3 root root 0 2008-10-29 11:39 7:7 drwxr-xr-x 3 root root 0 2008-10-28 18:32 8:0 drwxr-xr-x 3 root root 0 2008-10-28 18:32 default > How many floppies (or emulated floppies) does this system have? 1 physical. Folkert van Heusden -- Ever wonder what is out there? Any alien races? Then please support the seti@home project: setiathome.ssl.berkeley.edu ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com -- 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/