From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422734AbWGNTpl (ORCPT ); Fri, 14 Jul 2006 15:45:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422733AbWGNTpl (ORCPT ); Fri, 14 Jul 2006 15:45:41 -0400 Received: from server.mrvanes.com ([81.17.40.76]:6373 "EHLO mail.mrvanes.com") by vger.kernel.org with ESMTP id S1422732AbWGNTpl (ORCPT ); Fri, 14 Jul 2006 15:45:41 -0400 From: Martin van Es To: Takashi Iwai Subject: Re: Kernel 2.6.17.1 bug/oops in snd_usb_audio subsystem Date: Fri, 14 Jul 2006 21:45:32 +0200 User-Agent: KMail/1.9.3 Cc: Alexey Dobriyan , linux-kernel@vger.kernel.org References: <200607141154.36939.martin@mrvanes.com> <200607141328.40680.martin@mrvanes.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200607142145.33081.martin@mrvanes.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Friday 14 July 2006 20:31, Takashi Iwai wrote: > At Fri, 14 Jul 2006 13:28:40 +0200, > > Martin van Es wrote: > > On Friday 14 July 2006 12:54, Alexey Dobriyan wrote: > > > On Fri, Jul 14, 2006 at 11:54:36AM +0200, Martin van Es wrote: > > > > I already sent this mail to perex@suse.cz a couple of days ago since > > > > I thought that was the closest match in the MAINTAINERS list for this > > > > oops. Since I didn't receive any reply > > > > > > Your kernel is tainted. Please complain to kqemu developers. Don't > > > waste Jaroslav's time. > > > > Thank you Alexey for pointing out I reported this oops while running a > > tainted kernel (kqemu was indeed tainting it). I interpreted the reply as > > a request for reproducing the oops on a untainted version of the Kernel > > of which I'll post the dmesg output below. > > > > Hope this helps. > > Is there anything else I can do to contribute? > > Try to compile with CONFIG_SND_DEBUG=y. Also, you can try to build > modules from alsa-driver-1.0.12rc1 whether the bug still exists in the > latest version. Thx! This is dmesg output with CONFIG_SND_DEBUG=y: BUG: unable to handle kernel NULL pointer dereference at virtual address 000001b8 printing eip: dea9a514 *pde = 00000000 Oops: 0002 [#1] Modules linked in: snd_usb_audio snd_usb_lib pwc snd_rawmidi snd_hwdep videodev v4l2_common capability commoncap ipw2200 CPU: 0 EIP: 0060:[] Not tainted VLI EFLAGS: 00210202 (2.6.17.1 #5) EIP is at snd_usb_pcm_open+0x34/0x4d0 [snd_usb_audio] eax: d6f115c0 ebx: 00000000 ecx: 0000000e edx: 000001a8 esi: deaa8d20 edi: c8ed7e50 ebp: d5631ee0 esp: c8ed7d9c ds: 007b es: 007b ss: 0068 Process ffmpeg (pid: 4950, threadinfo=c8ed6000 task=ca731a30) Stack: 00000020 c8ed7dd8 00000000 c8ec7000 00000010 d5631ee0 c030f7f4 c8ec7000 00000000 00000010 c8ec7000 000001a8 00000011 0000000b ffffffff cd1a0400 00000000 0000000d c8ed7e50 d5631ee0 c030fb17 d6f115c0 00000001 c921c900 Call Trace: snd_pcm_hw_constraints_init+0x704/0x790 snd_pcm_open_substream+0x57/0xb0 snd_pcm_oss_open+0x221/0x4a0 generic_permission+0x110/0x120 kobject_get+0x17/0x20 default_wake_function+0x0/0x20 soundcore_open+0x8d/0x1c0 chrdev_open+0x76/0x160 chrdev_open+0x0/0x160 __dentry_open+0xbb/0x200 do_filp_open+0x5c/0x70 get_unused_fd+0x5b/0xc0 do_sys_open+0x53/0x100 sys_open+0x27/0x30 syscall_call+0x7/0xb Code: 8b 48 5c 8d 14 52 fc 89 4c 24 28 89 d1 c1 e1 04 01 ca b9 0e 00 00 00 8d 14 d5 10 00 00 00 89 54 24 2c 8b 58 08 01 da 89 54 24 2c 42 10 ff ff ff ff c7 42 24 00 00 00 00 8b 7c 24 28 81 c7 d0 EIP: [] snd_usb_pcm_open+0x34/0x4d0 [snd_usb_audio] SS:ESP 0068:c8ed7d9c Regards, Martin