Crash on shutdown

[Justin R. Smith]

FreeBSD jsmith.org 5.3-STABLE FreeBSD 5.3-STABLE #0: Fri Oct 22 04:33:03
EDT 2004     root@:/usr/obj/usr/src/sys/MYKERNEL  i386

On shutdown I got:

Giving up on 1 buffers
Fatal trap 12; page fault while in kernel mode
cpuid = 0, apic id = 00
Fault virtual address 0x34
Fault code = Supervisor read page not present
Instruction pointer 0x8:0xc0449f2c
Stack pointer = 0x10:0x03a94a0c
Code segment = base 0x0 limitg 0xfffff type 0x1b
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