Kernel Panic, Trap 12

[Remi L.]

I am experiences some difficulty upgrading from 5.1-RELEASE to -CURRENT. I
have a Sony VAIO GRX570(P4 1.6GHz, 512MB, DVDROM/CD-RW). I installed 5.1-R
and CVSup'd -CURRENT, did I make world, with no problems. On reboot I get:

Fatal trap 12: page fault while in kernel mode
Fault virtual address=		0xdeadc0de
Fault code=				supervisor write, page not present
Instruction pointer=		0x8:0xc0
Stack pointer=			0x10:0xc077e7b8
Frame pointer=			0x10:0xc077e7d8
Code segment=			base 0x0, limit 0xfffff, type 0x1b
                              DBL0, pres 1, def32, gran 1
Processor eflags=         	interrupt enabled resume, IOPL = 0
Current process=          	0 (swapper)
Kernel type 12 trap, code = 	0
Stopped at ithread_add_handler+0x143 movl %ebx,0(%eax)

Please note that this happens directly after inphy on boot. Any ideas how to
fix this error?