ksymoops 2.3.4 on i686 2.4.0-prerelease-acpi.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.0-prerelease-acpi/ (default)
     -m /boot/System.map-2.4.0-prerelease-acpi (specified)

Unable to handle kernel NULL pointer dereference at virtual address 00000000
c01ac476
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c01ac476>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010206
eax: 0000a800   ebx: c3fa1ea4   ecx: 0000001e   edx: c1123770
esi: 00000000   edi: c027e3fc   ebp: c027e378   esp: c3fa1e84
ds: 0018   es: 0018   ss: 0018
Process kacpid (pid: 7, stackpage=c3fa1000)
Stack: c3f86360 c3fa1f1c c3fa1f78 c3f86360 c3f86360 c3fa1f1c c3fa1f78 c1123770 
       000000f0 c1123760 c01ac597 c3f86360 c027e378 c020ef80 00000000 c3f86360 
       c3fa1f1c c3fa1f78 00000006 30544142 00000009 30504e50 00413043 00000000 
Call Trace: [<c01ac597>] [<c020ef80>] [<c01988e1>] [<c01a6187>] [<c01a5a13>] [<c020ea58>] [<c01a61d7>] 
       [<c01a60e0>] [<c01ac494>] [<c020f30e>] [<c01ac96c>] [<c020f30e>] [<c01ac494>] [<c020ea58>] [<c020fc22>] 
       [<c01adaf8>] [<c020fc1c>] [<c01adb12>] [<c01ac12f>] [<c020eb82>] [<c0220018>] [<c01074c3>] [<c01074cc>] 
Code: ac aa 84 c0 75 f7 f3 aa 8b 43 04 50 e8 4d ab f7 ff 31 c0 83 

>>EIP; c01ac476 <acpi_get_battery_info+14e/16c>   <=====
Trace; c01ac597 <acpi_found_cmbatt+103/16c>
Trace; c020ef80 <_acpi_ctype+3700/6a45>
Trace; c01988e1 <acpi_cm_execute_HID+75/80>
Trace; c01a6187 <acpi_ns_get_device_callback+a7/b4>
Trace; c01a5a13 <acpi_ns_walk_namespace+87/104>
Trace; c020ea58 <_acpi_ctype+31d8/6a45>
Trace; c01a61d7 <acpi_get_devices+43/6c>
Trace; c01a60e0 <acpi_ns_get_device_callback+0/b4>
Trace; c01ac494 <acpi_found_cmbatt+0/16c>
Trace; c020f30e <_acpi_ctype+3a8e/6a45>
Trace; c01ac96c <acpi_cmbatt_init+18/94>
Trace; c020f30e <_acpi_ctype+3a8e/6a45>
Trace; c01ac494 <acpi_found_cmbatt+0/16c>
Trace; c020ea58 <_acpi_ctype+31d8/6a45>
Trace; c020fc22 <_acpi_ctype+43a2/6a45>
Trace; c01adaf8 <acpi_power_init+40/60>
Trace; c020fc1c <_acpi_ctype+439c/6a45>
Trace; c01adb12 <acpi_power_init+5a/60>
Trace; c01ac12f <acpi_thread+eb/21c>
Trace; c020eb82 <_acpi_ctype+3302/6a45>
Trace; c0220018 <__ksymtab_arp_broken_ops+0/8>
Trace; c01074c3 <kernel_thread+1f/38>
Trace; c01074cc <kernel_thread+28/38>
Code;  c01ac476 <acpi_get_battery_info+14e/16c>
00000000 <_EIP>:
Code;  c01ac476 <acpi_get_battery_info+14e/16c>   <=====
   0:   ac                        lods   %ds:(%esi),%al   <=====
Code;  c01ac477 <acpi_get_battery_info+14f/16c>
   1:   aa                        stos   %al,%es:(%edi)
Code;  c01ac478 <acpi_get_battery_info+150/16c>
   2:   84 c0                     test   %al,%al
Code;  c01ac47a <acpi_get_battery_info+152/16c>
   4:   75 f7                     jne    fffffffd <_EIP+0xfffffffd> c01ac473 <acpi_get_battery_info+14b/16c>
Code;  c01ac47c <acpi_get_battery_info+154/16c>
   6:   f3 aa                     repz stos %al,%es:(%edi)
Code;  c01ac47e <acpi_get_battery_info+156/16c>
   8:   8b 43 04                  mov    0x4(%ebx),%eax
Code;  c01ac481 <acpi_get_battery_info+159/16c>
   b:   50                        push   %eax
Code;  c01ac482 <acpi_get_battery_info+15a/16c>
   c:   e8 4d ab f7 ff            call   fff7ab5e <_EIP+0xfff7ab5e> c0126fd4 <kfree+0/b0>
Code;  c01ac487 <acpi_get_battery_info+15f/16c>
  11:   31 c0                     xor    %eax,%eax
Code;  c01ac489 <acpi_get_battery_info+161/16c>
  13:   83 00 00                  addl   $0x0,(%eax)