FreeBSD 7.2 Fatal trap 9 - general protection fault while in kernel mode

[cronfy]

Hello,

I have Fatal trap 9: general protection fault while in kernel mode with 
FreeBSD 7.2 and kernel csup'ed and build on 22 Oct using 
standard-supfile. How can I find out what is the problem?

Message:

Fatal trap 9: general protection fault while in kernel mode
cpuid = 11; apic id = 13
instruction pointer     = 0x8:0xffffffff802a65c1
stack pointer           = 0x10:0xffffffff79d75380
frame pointer           = 0x10:0xffffffff79d753a0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 114 (php)

Backtrace:

db> bt

Tracing pid 114 tid 100403 td 0xffffff00452ec370
devstat_start_transaction() at devstat_start_transaction+0x11
g_io_request() at g_io_request+0x11f
breadn() at breadn+0xd3
bread() at bread+0x1e
ffs_vgetf() at ffs_vgetf+0x2dc
ufs_root() at ufs_root+0x21
lookup() at lookup+0x981
namei() at namei+0x33e
kern_statfs() at kern_statfs+0x60
statfs() at statfs+0x2a
syscall() at syscall+0x256
Xfast_syscall() at Xfast_syscall+0xab
--- syscall (396, FreeBSD ELF64, statfs), rip = 0x8022ade1c, rsp = 
0x7fffffffc528, rbp = 0x802536bb8 ---


Kernel config:

GENERIC config was changed: I disabled options for hardware that I do 
not require on this server and added some options

options QUOTA
options KDB
options DDB

I am using aacu RAID driver from Adaptec's site:

aacu0: Adaptec 2405, aac driver 2.2.8-17517



What can it be? Soft-updates? aacu driver problem? Something else? Any 
help would be appreciated.