new -current panic

Just got this one (using bsd scheduler):

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x24
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc04b8f3b
stack pointer           = 0x10:0xcd619bc4
frame pointer           = 0x10:0xcd619bd8
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         = 3 (g_up)
kernel: type 12 trap, code=0
Stopped at      propagate_priority+0x8b:        cmpl    0x24(%ebx),%ecx
db> trace
propagate_priority(c0ebfe40,c25983c0,c2512400,cd619c14,c04cc9d1) at propagate_pr
iority+0x8b
_mtx_lock_sleep(c069c340,0,0,0,c0698700) at _mtx_lock_sleep+0x249
bufdonebio(c7675b68,cd619c44,c048d612,c084c540,c259f990) at bufdonebio+0x47
biodone(c7675b68,c06411ba,c259f990,c7675b68,0) at biodone+0xbc
g_dev_done(c259f990,c0ebfe40,1,0,4) at g_dev_done+0x8a
biodone(c259f990,0,24c,c0640b45,a) at biodone+0xbc
g_io_schedule_up(c0ebfe40,c0ebe1e4,cd619d34,c04acae1,0) at g_io_schedule_up+0xb8
g_up_procbody(0,cd619d48,0,0,0) at g_up_procbody+0x28
fork_exit(c048df60,0,cd619d48) at fork_exit+0xb1
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xcd619d7c, ebp = 0 ---
db> 
-Søren