Open Sound System - OSS "soundon" command causes KERNEL PANIC FreeBSD-11

[Greg Quinlan]

Hi HPS,
Note: Does not happen on FreeBSD 10.1-Stable!

Complete back trace:
panic: Lock (sx) module subsystem sx lock not locked @ /usr/src/sys/kern/kern_module.c:219.
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe02376ae530
vpanic() at vpanic+0x182/frame 0xdbfffffe02376ae5b0
kassert_panic at kasset_panic+0x126/frame 0xfffffe02376ae620
witness_assert() at wintness_assert+0x346/frame 0xfffffe02376ae680
module_lookupbyname() atm odule_lookupbyname+0x2a/frame 0xfffffe02376ae6b0
soundcard_attach() at soundcard_attach+0x12/frame 0xfffffe023766d0
module_rgister_init() at module_rgister_init+0xb0/frame 0xfffffe02376ae700
linker_load_module() at linker_load_module+0xc8e/frame 0xfffffe02376aea30
kern_kldload() at sys_kldload+0xa7/frame 0xfffffe02376aea70
sys_kldload() at sys_kldload+0x5b/frame 0xfffffe02376aeaa0
amd64_syscall() at amd64_syscall+02db/frame 0xfffffe02376aebb0
xfast_syscall() at xfast_syscall+0fb/frame 0xfffffe02376aebb0
--- syscall (304, FreeBSD ELF64, sys_kldload, rip = 0x80086b6aa, rsp = 0x7fffffffe718, rbp = 0x7fffffffec30 ---
KDB: enter: panic
[ thread pid 1025 tid 100233 ]
Stopped at      kdb_enter+0x3b: movq    $0,kdb_why
/boot/modules
# cd /boot/modules
# ls -ltr
total 15008
-r-xr-xr-x  1 root  wheel      80280  Nov  6  15:01 fuse.ko
-r-xr-xr-x  1 root  wheel  1633464  Nov  6  15:02 radeonkms_port.ko
-r-xr-xr-x  1 root  wheel    700232  Nov  6  15:02 i915kms_port.ko
-r-xr-xr-x  1 root  wheel    421696  Nov  6  15:02 drm2_port.ko
-r-xr-xr-x  1 root  wheel      26848  Dec 15 21:39 vboxnetflt.ko
-r-xr-xr-x  1 root  wheel        9752  Dec 15 21:39 vboxnetadp.ko
-r-xr-xr-x  1 root  wheel    356152  Dec 15 21:39 vboxdrv.ko
-r-xr-xr-x  1 root  wheel      38632  Dec 16 07:05 cuse4bsd.ko
-r-xr-xr-x  1 root  wheel 11926368 Dec 20 07:40 nvidia.ko
-rw-r--r--  1 root  wheel         1008 Dec 20 07:40 linker.hints

Thanks GQ
      From: Hans Petter Selasky <hps at selasky.org>
 To: Greg Quinlan <gwq_uk at yahoo.com>; "freebsd-current at freebsd.org" <freebsd-current at freebsd.org> 
 Sent: Wednesday, 10 February 2016, 21:07
 Subject: Re: Open Sound System - OSS "soundon" command causes KERNEL PANIC FreeBSD-11
   
On 02/10/16 10:51, Greg Quinlan wrote:
>
>  Hi,
>
> I haven't seen a Kernel Panic like this for a long time... i.e. repeatable and due to a single command.
>
> I have compiled the port /usr/ports/audio/oss and installed it on FreeBSD11.
>
> A ran  /usr/local/sbin/ossdetect which created the file /usr/local/lib/oss/etc/installed_drivers.
>
> Contents:
> Code:oss_hdaudio #Intel High Definition Audio (CPT)
>
> When i run  /usr/local/sbin/soundon
>
> The system panics..
>
> Code:osscore.ac97_amplifier="0"
> panic: Lock (sx) module subsystem lock sx lock not locked 0 /usr/src/sys/kern/kern_module.c:219
> cpu_id = 1
> :
>

Hi,

Do you have the complete backtrace for this panic?

Do you have any modules under /boot/modules, which are not up to date?

Does the same happen with audio/oss under 10.x ?

--HPS