On 07/25/16 03:13 PM, Randy Westlund wrote:
> I'm running 12-CURRENT r303286 and virtualbox-ose-kmod-5.0.26.  I just
> rebuilt the module, so I know they're in sync.  When I boot with
> vboxdrv_load="YES" in /etc/loader.conf, I get this panic during boot:
>> panic: mutex Giant owned at /usr/src/sys/kern/kern_sync.c:406
>> cpuid = 0
>> KDB: stack backtrace:
>> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b
>> vpanic() at vpanic+0x182
>> panic() at panic+0x43
>> __mtx_assert() at __mtx_assert+0xd1
>> mi_switch() at mi_switch+0x7b
>> sleepq_switch() at sleepq_switch+0x7e
>> sleepq_timedwait() at sleepq_timedwait+0x43
>> rtR0SemEventWait() at rtR0SemEventWait+0x267
>> supdrvGipCreate() at supdrvGipCreate+0x7f6
>> supdrvInitDexExt() at supdrvInitDexExt+0x18f
>> VBoxDrvFreeBSDModuleEvent() at VBoxDrvFreeBSDModuleEvent+0x49
>> module_register_init() at module_register_init+0xb0
>> mi_startup() at mi_startup+0x118
>> btext() at btext+0x2c
>> KDB: enter: panic
>> [ thread pid 0 tid 100000 ]
>> Stopped at      kdb_enter+0x3b: movq    $0,kdb_why
> I'm not sure whether this is a problem with the base system or the port,
> but this happens every time I boot with the module enabled.

emulators/virtualbox-ose-kmod is causing the trouble and this problem is
well known.  To work around it, remove WITNESS option from kernel
configuration for now.

Jung-uk Kim

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