Oops writing to /dev/cpu/microcode in 2.4.0-test2-pre4

From: Chris Meadors (clubneon@hereintown.net)
Date: Tue Jun 20 2000 - 14:10:49 EST

I have setup in my init script the Pentium microcode updater. Upon
booting 2.4.0-test2-pre4 I got the following (decoded) oops:

Unable to handle kernel NULL pointer dereference at virtual address
00000008
c0108f98
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0108f98>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
eax: c0318c34 ebx: 00000000 ecx: 0000008b edx: 0000002a
esi: 00000014 edi: 00000010 ebp: 00000001 esp: c1317f58
ds: 0018 es: 0018 ss: 0018
Process microcode_ctl (pid: 18, stackpage=c1317000)
Stack: 00000000 00018000 c1315000 c7f439e0 00008000 00000652 c0108e0d
c0318c34
       00000000 00018000 c1315000 c7f439e0 00000000 c0109115 c7f439e0
ffffffea
       00000000 c0130cac c7f439e0 bf85daec 00018000 c7f43a00 c1316000
4000ab44
Call Trace: [<c0108e0d>] [<c0109115>] [<c0130cac>] [<c010b6d0>]
Code: 8b 43 08 50 52 56 6a 00 68 40 9d 23 c0 e8 72 13 01 00 83 c4

>>EIP; c0108f98 <do_update_one+138/160> <=====
Trace; c0108e0d <do_microcode_update+19/6c>
Trace; c0109115 <microcode_write+d5/110>
Trace; c0130cac <sys_write+c0/e0>
Trace; c010b6d0 <system_call+34/38>
Code; c0108f98 <do_update_one+138/160>
00000000 <_EIP>:
Code; c0108f98 <do_update_one+138/160> <=====
   0: 8b 43 08 mov 0x8(%ebx),%eax <=====
Code; c0108f9b <do_update_one+13b/160>
   3: 50 push %eax
Code; c0108f9c <do_update_one+13c/160>
   4: 52 push %edx
Code; c0108f9d <do_update_one+13d/160>
   5: 56 push %esi
Code; c0108f9e <do_update_one+13e/160>
   6: 6a 00 push $0x0
Code; c0108fa0 <do_update_one+140/160>
   8: 68 40 9d 23 c0 push $0xc0239d40
Code; c0108fa5 <do_update_one+145/160>
   d: e8 72 13 01 00 call 11384 <_EIP+0x11384> c011a31c
<printk+0/15c>
Code; c0108faa <do_update_one+14a/160>
  12: 83 c4 00 add $0x0,%esp 

-- 
...and sometimes, late at night I get these twitches.  Like dead people get.
(Or, as I prefer to call them, perfect computer users)
                                                                 --The BOFH

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This archive was generated by hypermail 2b29 : Fri Jun 23 2000 - 21:00:20 EST