From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750809AbWDDTGj (ORCPT ); Tue, 4 Apr 2006 15:06:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750811AbWDDTGj (ORCPT ); Tue, 4 Apr 2006 15:06:39 -0400 Received: from mail.gondor.com ([212.117.64.182]:9989 "EHLO moria.gondor.com") by vger.kernel.org with ESMTP id S1750809AbWDDTGi (ORCPT ); Tue, 4 Apr 2006 15:06:38 -0400 Date: Tue, 4 Apr 2006 21:06:31 +0200 From: Jan Niehusmann To: Takashi Iwai Cc: Ken Moffat , linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org Subject: Re: [Alsa-devel] Slab corruptions & Re: 2.6.17-rc1: Oops in sound applications Message-ID: <20060404190631.GA4895@knautsch.gondor.com> References: <20060404133814.GA11741@knautsch.gondor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 04, 2006 at 05:56:36PM +0200, Takashi Iwai wrote: > Could you try the patch below by OGAWA Hirofumi > ? Sorry, no success with that patch applied: Apr 4 20:18:00 knautsch kernel: [17179569.184000] Linux version 2.6.17-rc1-g231a1569-dirty (root@knautsch) (gcc version 4.0.3 (Debian 4.0.3-1)) #1 Tue Apr 4 19:37:29 CEST 2006 (This is 2.6.17-rc1 with the patch you sent applied) Apr 4 20:25:51 knautsch kernel: [17180076.984000] BUG: unable to handle kernel paging request at virtual address 6b6b6b6b Apr 4 20:25:51 knautsch kernel: [17180076.984000] printing eip: Apr 4 20:25:51 knautsch kernel: [17180076.984000] e04a2eb6 Apr 4 20:25:51 knautsch kernel: [17180076.984000] *pde = 00000000 Apr 4 20:25:51 knautsch kernel: [17180076.984000] Oops: 0000 [#1] Apr 4 20:25:51 knautsch kernel: [17180076.984000] Modules linked in: tun ipv6 lp i915 drm rfcomm l2cap bluetooth thermal processor fan button battery asus_acpi ac usb_storage usbmouse sbp2 usbkbd autofs4 af_packet nls_iso8859_1 nls_cp437 usbhid cm4000_cs 8250_pci 8250 serial_core eth1394 pcmcia snd_intel8x0 snd_pcm_oss snd_mixer_oss snd_intel8x0m snd_ac97_codec snd_ac97_bus ipw2200 ieee80211 ieee80211_crypt 8139too mii nsc_ircc irda snd_pcm snd_timer ohci1394 ieee1394 evdev joydev crc_ccitt parport_pc parport pcspkr firmware_class yenta_socket rsrc_nonstatic pcmcia_core rtc snd soundcore snd_page_alloc ehci_hcd uhci_hcd usbcore intel_agp agpgart Apr 4 20:25:51 knautsch kernel: [17180076.984000] CPU: 0 Apr 4 20:25:51 knautsch kernel: [17180076.984000] EIP: 0060:[pg0+537210550/1069212672] Not tainted VLI Apr 4 20:25:51 knautsch kernel: [17180076.984000] EFLAGS: 00210002 (2.6.17-rc1-g231a1569-dirty #1) Apr 4 20:25:51 knautsch kernel: [17180076.984000] EIP is at snd_pcm_lib_write1+0x196/0x4a0 [snd_pcm] Apr 4 20:25:51 knautsch kernel: [17180076.984000] eax: 000009c4 ebx: cc785a84 ecx: de505e54 edx: 6b6b6b6b Apr 4 20:25:51 knautsch kernel: [17180076.984000] esi: 0000062c edi: 00000000 ebp: dede51a4 esp: de505e78 Apr 4 20:25:51 knautsch kernel: [17180076.984000] ds: 007b es: 007b ss: 0068 Apr 4 20:25:51 knautsch kernel: [17180076.984000] Process twinkle (pid: 4936, threadinfo=de505000 task=cae0f550) Apr 4 20:25:51 knautsch kernel: [17180076.984000] Stack: <0>dede51a4 000015cd e07a5000 00000b42 0000003c 00000001 cc785b28 c84ef000 Apr 4 20:25:51 knautsch kernel: [17180076.984000] e07a5000 00000b7e 00000b7e 00000000 00000000 0001c639 00000000 cae0f550 Apr 4 20:25:51 knautsch kernel: [17180076.984000] c0114d60 cc785b28 cc785b28 c0000000 de505000 dede51a4 cc785a84 e0547727 Apr 4 20:25:51 knautsch kernel: [17180076.984000] Call Trace: Apr 4 20:25:51 knautsch kernel: [17180076.984000] default_wake_function+0x0/0x20 snd_pcm_oss_write3+0x67/0xe0 [snd_pcm_oss] Apr 4 20:25:51 knautsch kernel: [17180076.984000] snd_pcm_lib_write_transfer+0x0/0xc0 [snd_pcm] snd_pcm_plug_write_transfer+0x8f/0xe0 [snd_pcm_oss] Apr 4 20:25:51 knautsch kernel: [17180076.984000] snd_pcm_oss_write2+0x7a/0x110 [snd_pcm_oss] snd_pcm_oss_write+0x10e/0x1f0 [snd_pcm_oss] Apr 4 20:25:51 knautsch kernel: [17180076.984000] vfs_write+0xb5/0x190 sys_write+0x4b/0x80 Apr 4 20:25:51 knautsch kernel: [17180076.984000] syscall_call+0x7/0xb Apr 4 20:25:51 knautsch kernel: [17180076.984000] Code: b8 c4 09 00 00 e8 db fb e5 df fa 85 c0 0f 85 05 02 00 00 8b 93 98 00 00 00 8b 02 83 f8 02 74 0b 8b 02 83 f8 06 0f 85 da 02 00 00 <8b> 02 83 f8 05 0f 8f ed 01 00 00 83 f8 04 0f 8d 1e 02 00 00 48 This oops is different from the others in that it contains the 6b6b6b6b magic from slab poisoning. But, again, this is clearly sound related: EIP points to snd_pcm_lib_write, and the trigger procedure was the following: 1) Use twinke to make a VoIP-Call. Sound was a little bit choppy, so there is already something wrong here. No oops or other error message yet, though. 2) From a second xterm, call "yes >/dev/dsp" This lead to a beeping sound (as expected), so opening the device and sending sound was successful - and to the oops quoted above. Jan