Date: Sat, 4 Sep 2004 23:32:17 +0200 (CEST) From: Christian Weisgerber <naddy@FreeBSD.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/71382: Recursive mutex panic in sbc(4) Message-ID: <200409042132.i84LWHI7001118@kemoauc.mips.inka.de> Resent-Message-ID: <200409042140.i84LeOt8061412@freefall.freebsd.org>
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>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:
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