panic on shutdown

Hey Guys,

i got this panic on doing "shutdown -r now".

Fatal trap 12: page fault while in kernel mode
cpuid = 1; lapic.id = 01000000
fault virtual address   = 0xdeadc0de
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc0521678
stack pointer           = 0x10:0xcdccd810
frame pointer           = 0x10:0xcdccd810
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 15 (swi1: net)
kernel: type 12 trap, code=0
Stopped at      strlen+0x8:     cmpb    $0,0(%edx)
db> t
strlen(deadc0de,cdccd8f4,c06e25a8,cdccd848,c04e0993) at strlen+0x8
kvprintf(c067d4f4,c04d9ca0,cdccd8f4,a,cdccd944) at kvprintf+0x5b2
vsnprintf(c06df060,100,c067d4f4,cdccd940,100) at vsnprintf+0x3e
panic(c067d4f4,deadc0de,c0687d51,66e,cdccd958) at panic+0xc9
_mtx_lock_flags(c2e93490,0,c0687d51,66e,c16e7d00) at _mtx_lock_flags+0x66
ip_rtaddr(57b52cd9,cdccdc38,1,14,c16e7d00) at ip_rtaddr+0x5e
ip_forward(c16e7d00,cdccdc38,0,0,c06e10a0) at ip_forward+0xb5
ip_input(c16e7d00,0,c06869f8,89,0) at ip_input+0x756
netisr_processqueue(c0706a70,0,c06869f8,e5,c169c5c0) at 
netisr_processqueue+0x8e

swi_net(0,0,c067bc0d,21b,c16a53c8) at swi_net+0x98
ithread_loop(c16a3c00,cdccdd48,c067ba6f,314,0) at ithread_loop+0x192
fork_exit(c04a5280,c16a3c00,cdccdd48) at fork_exit+0xcf
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xcdccdd7c, ebp = 0 ---

Don't know if it's useful or not.

Regards,
flo