kernel very unstable

--------------Boundary-00=_Y9G4Y8HUL9MV2MYL6YGJ
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: 8bit

Pete,

I attached the kernel error that gets dumped into my messages log. As you
read you'll see the last one happened at 4-something in the morning - it
happens at random, regardless of what I'm doing. If anyone can figure it out
I'd greatly appreciate it.

Thanks


--
====================
Lucas Vogel
--------------Boundary-00=_Y9G4Y8HUL9MV2MYL6YGJ
Content-Type: text/plain;
charset="iso-8859-1";
name="kernel_crash"
Content-Transfer-Encoding: 8bit
Content-Disposition: attachment; filename="kernel_crash"

Mar 10 00:04:52 cx229913-e kernel: kmem_free: Bad obj addr (objp=c284d0e0, name=buffer_head)
Mar 10 00:04:52 cx229913-e kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000
Mar 10 00:04:52 cx229913-e kernel: current->tss.cr3 = 00101000, %%cr3 = 00101000
Mar 10 00:04:52 cx229913-e kernel: *pde = 00000000
Mar 10 00:04:52 cx229913-e kernel: Oops: 0002
Mar 10 00:04:52 cx229913-e kernel: CPU:    0
Mar 10 00:04:52 cx229913-e kernel: EIP:    0010:[kmem_cache_free+315/356]
Mar 10 00:04:52 cx229913-e kernel: EFLAGS: 00010282
Mar 10 00:04:52 cx229913-e kernel: eax: 0000003d   ebx: c284d0e0   ecx: ffffffff   edx: 0000003c
Mar 10 00:04:52 cx229913-e kernel: esi: cbfff740   edi: 00000282   ebp: c0342ca8   esp: cbfe1ecc
Mar 10 00:04:52 cx229913-e kernel: ds: 0018   es: 0018   ss: 0018
Mar 10 00:04:52 cx229913-e kernel: Process kswapd (pid: 5, process nr: 5, stackpage=cbfe1000)
Mar 10 00:04:52 cx229913-e kernel: Stack: c284d0e0 c0342ca8 c02b0140 c033e6d0 c010a1be 0000000a cbfe1f30 ca47db80
Mar 10 00:04:52 cx229913-e kernel:        c2641e90 c0128eea cbfff740 c284d0e0 cbfff620 c1c39f80 c284d0e0 c0128356
Mar 10 00:04:52 cx229913-e kernel:        c010a5cd 00000216 c284d0e0 c284d0e0 c284d130 c0129c90 c284d0e0 c284d130
Mar 10 00:04:52 cx229913-e kernel: Call Trace: [do_8259A_IRQ+142/160] [put_unused_buffer_head+38/84] [remove_from_queues+262/356] [do_IRQ+41/68] [try_to_free_buffers+68/148] [try_to_free_buffers+59/148] [try_to_free_buffers+116/148]
Mar 10 00:04:52 cx229913-e kernel:        [shrink_mmap+225/316] [tvecs+7662/14432] [schedule+322/628] [do_try_to_free_pages+47/148] [tvecs+7662/14432] [tvecs+7662/14432] [kswapd+105/156] [kswapd+82/156]
Mar 10 00:04:52 cx229913-e kernel:        [kernel_thread+31/56] [kernel_thread+40/56]
Mar 10 00:04:52 cx229913-e kernel: Code: c7 05 00 00 00 00 00 00 00 00 eb 12 83 c4 fc 56 53 68 9e af
Mar 10 13:06:59 cx229913-e syslogd 1.3-3: restart.
--------------Boundary-00=_Y9G4Y8HUL9MV2MYL6YGJ--