kern/63630: panic: _mtx_lock_sleep: recursed on non_recursive mutex sbc ....

Chris England cengland at obscurity.org
Mon Mar 1 22:40:19 PST 2004


>Number:         63630
>Category:       kern
>Synopsis:       panic: _mtx_lock_sleep: recursed on non_recursive mutex sbc ....
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Mar 01 22:40:19 PST 2004
>Closed-Date:
>Last-Modified:
>Originator:     Chris England
>Release:        FreeBSD 5.2-CURRENT
>Organization:
>Environment:
FreeBSD eternal.stabs.org 5.2-CURRENT FreeBSD 5.2-CURRENT #0: Mon Mar  1 20:51:26 PST 2004     stab at eternal.stabs.org:/usr/src/sys/i386/compile/GENERIC  i386

>Description:
Using 'device pcm' and 'device sbc' in kernel, or loading snd_pcm/snd_sb16 modules results in kernel panic when sound is played:

panic: _mtx_lock_sleep: recursed on non_recursive mutex sbc @ ../../../dev/sound
/isa/sbc.c:131
at line 436 in file ../../../kern/kern_mutex.c
Stopped at Debugger+0x45: xchgl %ebx, in_Debugger.0

dmesg:
sbc0: <SoundBlaster 16> at port 0x220-0x22f irq 5 drq 1 flags 0x15 on isa0
pcm0: <SB16 DSP 4.13> on sbc0

device.hints:
hint.sbc.0.at="isa"
hint.sbc.0.irq="5"
hint.sbc.0.port="0x220"
hint.sbc.0.drq="1"
hint.sbc.0.flags="0x15"

Last cvsup to -CURRENT was done on March 1st @ 12PM PST.
>How-To-Repeat:
Play a sound with the configuration mentioned.
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted:


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