Bug 26430
| Summary: | [sound] -CURRENT panics on cat /dev/dsp or cat /dev/audio | ||
|---|---|---|---|
| Product: | Base System | Reporter: | davidt <davidt> |
| Component: | kern | Assignee: | sound |
| Status: | Closed FIXED | ||
| Severity: | Affects Only Me | ||
| Priority: | Normal | ||
| Version: | 5.0-CURRENT | ||
| Hardware: | Any | ||
| OS: | Any | ||
On Sun, 08 Apr 2001, davidt@yadt.co.uk wrote: > >Description: > > attempting to read from /dev/audio and /dev/dsp causes the > kernel to panic. > Here's a copy of a trace from ddb: panic: mutex pcm0:record:0 not owned at /usr/src/sys/kernl/kern_sync.c:404 Debugger("panic") Stopped at Debugger+0x45: pushl %ebx db> trace Debugger(c02df07b) at Debugger+0x45 panic(c02de2a8,c0e55838,c02df840,194,4) at panic+0x70 _mtx_assert(c1658c80,9,c02df840,194) at _mtx_assert+0x4e msleep(c1663a00,c1658c80,14c,c02d6685,1) at msleep+2a3 chn_sleep(c0e55800,c02d6685,1,4,0) at chn_sleep+0x21 chn_read(c0e55800,cecc4ef0,cecc4ef0,cecc4ef0,c0e55800) at chn_read+0x164 dsp_read(c164c800,0,cecc4ef0,20000,cece9500) at dsp_read+0x172 sndread(c036b50c,cecc4ef0,20000,c036b50c,0) at sndread+0x5b spec_read(cecc4e80,cecc4e94,c01ec3f7,cecc4e80,cecc4ef0) at spec_read+0x74 spec_vnoperate(cecc4e80,cecc4ef0,cecc4f80,400,0) at spec_vnoperate+0x15 vn_read(c1c57a00,cecc4ef0,c2096200,0,cec1cfe0) at vn_read+0x17 dofileread(cec1cfe0,c1c57a00,3,805c000,400) at dofileread+0xb2 read(cec1cfe0,cecc4f80,bfbffb60,3,1) at read+0x3b syscall(2f,2f,2f,1,3) at syscall+0x59d syscall_with_err_pushed() at syscall_with_err_pushed+0x1b db> call dumpsys dumping to dev ad0s4b, offset 584197 dump ata0: resetting devices .. panic: mutex sched lock recursed at /usr/src/sys/kernl/kern_sync.c:855 Uptime: 1h13m41s Dump already in progress, bailing... Automatic reboot in 15 seconds - press a key on the console to abort --> Press a key on the console to reboot <-- Rebooting.. -- David Taylor davidt@yadt.co.uk Responsible Changed From-To: freebsd-bugs->cg Over to sound guy. Responsible Changed From-To: cg->sound With permission, reassign to mailing list alias. State Changed From-To: open->closed A lot changed in CURRENT since 2001. I can't reproduce the problem on a recent CURRENT, so this is most likely fixed |
attempting to read from /dev/audio and /dev/dsp causes the kernel to panic. panic: mutex pcm0:record:0 not owned at /usr/src/sys/kernl/kern_sync.c:404 Debugger("panic") Stopped at Debugger+0x45: pushl %ebx db> call dumpsys dumping to dev ad0s4b, offset 584197 dump ata0: resetting devices .. panic: mutex sched lock recursed at /usr/src/sys/kernl/kern_sync.c:855 Uptime: 9m30s Dump already in progress, bailing... Automatic reboot in 15 seconds - press a key on the console to abort --> Press a key on the console to reboot <-- Rebooting.. ... Unfortunately, since it refuses to give a dump, I can't get a backtrace.. and I forgot to try to get a trace from ddb.. I'll attempt to copy that down next time, and add it to this PR, oops. (On the plus side, at least current doesn't display the odd left channel only behaviour in 26304) How-To-Repeat: $ cat /dev/audio