From owner-freebsd-bugs@FreeBSD.ORG Sat Sep 4 21:40:24 2004 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6CCCD16A4F5 for ; Sat, 4 Sep 2004 21:40:24 +0000 (GMT) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 41F0243D1D for ; Sat, 4 Sep 2004 21:40:24 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.12.11/8.12.11) with ESMTP id i84LeO1D061413 for ; Sat, 4 Sep 2004 21:40:24 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.12.11/8.12.11/Submit) id i84LeOt8061412; Sat, 4 Sep 2004 21:40:24 GMT (envelope-from gnats) Resent-Date: Sat, 4 Sep 2004 21:40:24 GMT Resent-Message-Id: <200409042140.i84LeOt8061412@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Christian Weisgerber Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C2DEF16A4CE for ; Sat, 4 Sep 2004 21:32:20 +0000 (GMT) Received: from mail-in-01.arcor-online.net (mail-in-01.arcor-online.net [151.189.21.41]) by mx1.FreeBSD.org (Postfix) with ESMTP id 03A9443D1F for ; Sat, 4 Sep 2004 21:32:20 +0000 (GMT) (envelope-from naddy@mips.inka.de) Received: from kemoauc.mips.inka.de (dsl-082-083-167-191.arcor-ip.net [82.83.167.191]) by mail-in-01.arcor-online.net (Postfix) with ESMTP id 7ECC72E58A for ; Sat, 4 Sep 2004 23:32:18 +0200 (CEST) Received: from kemoauc.mips.inka.de (localhost [127.0.0.1]) by kemoauc.mips.inka.de (8.13.1/8.12.10) with ESMTP id i84LWHZB001119 for ; Sat, 4 Sep 2004 23:32:17 +0200 (CEST) (envelope-from naddy@kemoauc.mips.inka.de) Received: (from naddy@localhost) by kemoauc.mips.inka.de (8.13.1/8.12.11/Submit) id i84LWHI7001118; Sat, 4 Sep 2004 23:32:17 +0200 (CEST) (envelope-from naddy) Message-Id: <200409042132.i84LWHI7001118@kemoauc.mips.inka.de> Date: Sat, 4 Sep 2004 23:32:17 +0200 (CEST) From: Christian Weisgerber To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Subject: kern/71382: Recursive mutex panic in sbc(4) X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Christian Weisgerber List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 04 Sep 2004 21:40:25 -0000 >Number: 71382 >Category: kern >Synopsis: Recursive mutex panic in sbc(4) >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Sep 04 21:40:23 GMT 2004 >Closed-Date: >Last-Modified: >Originator: Christian Weisgerber >Release: FreeBSD 5.3-BETA2 alpha >Organization: >Environment: System: FreeBSD kemoauc.mips.inka.de 5.3-BETA2 FreeBSD 5.3-BETA2 #0: Sat Sep 4 11:25:17 CEST 2004 naddy@kemoauc.mips.inka.de:/usr/obj/usr/src/sys/GENERIC alpha >Description: System: 5.3-BETA2/alpha. With a Soundblaster Vibra16C soundcard (modules: sound, snd_sbc, snd_sb16), any attempt to output sound immediately causes a kernel panic. The same setup used to work fine in 5.x/alpha; the problem appeared in 5.x a few weeks ago. panic: _mtx_lock_sleep: recursed on non-recursive mutex sbc0 @ /usr/src/sys/modules/sound/driver/sbc/../../../../dev/sound/isa/sbc.c:131 panic() at panic+0x210 _mtx_lock_sleep() at _mtx_lock_sleep+0x64 _mtx_lock_flags() at _mtx_lock_flags+0x9c sbc_lock() at sbc_lock+0x28 sb_lock() at sb_lock+0x30 sb_cmd2() at sb_cmd2+0x30 sb_setup() at sb_setup+0x3e0 sb16chan_trigger() at sb16chan_trigger+0x34 chn_trigger() at chn_trigger+0xd0 chn_start() at chn_start+0x19c chn_write() at chn_write+0x350 dsp_write() at dsp_write+0xd0 spec_write() at spec_write+0x204 spec_vnoperate() at spec_vnoperate+0x2c vn_write() at vn_write+0x2c0 dofilewrite() at dofilewrite+0x110 write() at write+0x60 syscall() at syscall+0x38c >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted: