ksymoops 2.3.3 on i686 2.3.99-pre5.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.3.99-pre5/ (default)
     -m /usr/src/linux/System.map (specified)

Unable to handle kernel NULL pointer dereference at virtual address 00000038
c011cb61
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[ptrace_writedata+29/172]
EFLAGS: 00010202
eax: 00000038   ebx: 0000001c   ecx: bffff000   edx: c9c22000
esi: 00000000   edi: bffffe8d   ebp: 00000011   esp: c3823f40
ds: 0018   es: 0018   ss: 0018
Process cat (pid: 26112, stackpage=c3823000)
Stack: c9c22000 c9c22000 c9c223dc c3929000 00000000 c0148f87 c9c22000 bffffe8d 
       c3929000 00000011 00000000 c9c223f8 c01493ce c9c22000 c3929000 c4338580 
       ffffffea 00000000 c4338580 c9c223dc 0804c000 cb353900 00000c00 c012c3bc 
Call Trace: [proc_lookupfd+79/268] [proc_pid_delete_inode+78/92] [get_empty_filp+156/252] [restore_all+10/14] 
Code: 39 43 1c 74 2a 50 8b 43 1c 50 68 00 5f 1b c0 e8 37 89 ff ff 
Using defaults from ksymoops -t elf32-i386 -a i386

Code;  00000000 Before first symbol
00000000 <_EIP>:
Code;  00000000 Before first symbol
   0:   39 43 1c                  cmp    %eax,0x1c(%ebx)
Code;  00000003 Before first symbol
   3:   74 2a                     je     2f <_EIP+0x2f> 0000002f Before first symbol
Code;  00000005 Before first symbol
   5:   50                        push   %eax
Code;  00000006 Before first symbol
   6:   8b 43 1c                  mov    0x1c(%ebx),%eax
Code;  00000009 Before first symbol
   9:   50                        push   %eax
Code;  0000000a Before first symbol
   a:   68 00 5f 1b c0            push   $0xc01b5f00
Code;  0000000f Before first symbol
   f:   e8 37 89 ff ff            call   ffff894b <_EIP+0xffff894b> ffff894b <END_OF_CODE+33720dac/????>