smbfs panic when lost connection or unmount --force

[Robert N. M. Watson]

On 10 Jul 2009, at 13:17, Oliver Pinter wrote:

> I know, that the bt is useful, but ddb works with usb keyboard?
> At nigth then I send the log.

Unfortunately, a known issue with FreeBSD 8.0 is that the new USB  
stack, while a vast improvement over the previous USB stack in  
countless ways, does not support polled access from DDB. You will need  
to use a serial port, firewire port, ps/2, or AT keyboard in order to  
get interactive DDB support.

If that's not feasible, or if it's just easier, you may be able to use  
the DDB scripting facility + textdumps to run DDB commands  
automatically on panic to produce useful debugging output. Take a look  
at the textdump(4) man page for details. This can be combined with a  
traditional crashdump to capture both DDB output and normal dump data  
for use with kgdb.

Robert

>
> //sorry for bad english
>
> ps.: attached the config
>
> On 7/10/09, Robert Watson <rwatson at freebsd.org> wrote:
>>
>> On Fri, 10 Jul 2009, Oliver Pinter wrote:
>>
>>> It is a kernel panic, when force unmount the smbfs volume or lost  
>>> the
>>> connection with the samba server.
>>
>> This is a NULL pointer dereference in the kernel.  Per Attilio's e- 
>> mail, a
>> stack trace should help us track it down.  Thanks!
>>
>> Robert N M Watson
>> Computer Laboratory
>> University of Cambridge
>>
>>>
>>> --
>>> Thes OS is:
>>>
>>>
>>> kern.ostype: FreeBSD
>>> kern.osrelease: 7.2-STABLE
>>> kern.osrevision: 199506
>>> kern.version: FreeBSD 7.2-STABLE #4: Sat Jun 27 21:44:32 CEST 2009
>>>   root at oliverp:/usr/obj/usr/src/sys/stable
>>> kern.osreldate: 702103
>>>
>>> --
>>> make.conf:
>>>
>>>
>>> CPUTYPE?=core2
>>> CFLAGS= -O2 -fno-strict-aliasing -pipe
>>> MODULES_OVERRIDE=smbfs libiconv libmchain zfs opensolaris drm cd9660
>>> cd9660_iconv
>>>
>>> --
>>> panic message:
>>>
>>> Jul 10 01:58:39 oliverp syslogd: kernel boot file is /boot/kernel/ 
>>> kernel
>>> Jul 10 01:58:39 oliverp kernel: kernel trap 12 with interrupts  
>>> disabled
>>> Jul 10 01:58:39 oliverp kernel:
>>> Jul 10 01:58:39 oliverp kernel:
>>> Jul 10 01:58:39 oliverp kernel: Fatal trap 12: page fault while in  
>>> kernel
>>> mode
>>> Jul 10 01:58:39 oliverp kernel: cpuid = 2; apic id = 02
>>> Jul 10 01:58:39 oliverp kernel: fault virtual address	= 0x30
>>> Jul 10 01:58:39 oliverp kernel: fault code		= supervisor read data,
>>> page not present
>>> Jul 10 01:58:39 oliverp kernel: instruction pointer	=
>>> 0x8:0xffffffff80327fd0
>>> Jul 10 01:58:39 oliverp kernel: stack pointer	        =
>>> 0x10:0xffffff8078360940
>>> Jul 10 01:58:39 oliverp kernel: frame pointer	        =
>>> 0x10:0xffffff0004c31390
>>> Jul 10 01:58:39 oliverp kernel: code segment		= base 0x0, limit
>>> 0xfffff, type 0x1b
>>> Jul 10 01:58:39 oliverp kernel: = DPL 0, pres 1, long 1, def32 0,  
>>> gran 1
>>> Jul 10 01:58:39 oliverp kernel: processor eflags	= resume, IOPL = 0
>>> Jul 10 01:58:39 oliverp kernel: current process		= 60406 (smbiod0)
>>> Jul 10 01:58:39 oliverp kernel: trap number		= 12
>>> Jul 10 01:58:39 oliverp kernel: panic: page fault
>>> Jul 10 01:58:39 oliverp kernel: cpuid = 2
>>> Jul 10 01:58:39 oliverp kernel: Uptime: 6h51m16s
>>> Jul 10 01:58:39 oliverp kernel: Physical memory: 4087 MB
>>> Jul 10 01:58:39 oliverp kernel: Dumping 2448 MB:Copyright (c)
>>> 1992-2009 The FreeBSD Project.
>>> _______________________________________________
>>> freebsd-stable at freebsd.org mailing list
>>> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
>>> To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org 
>>> "
>>>
>>
> <kernel_conf.txt>