Problem with 2.4.20: Unable to handle kernel NULL pointer dereference at virtual address 00000004

[Zhenghui Zhou]

I runing a heavy stress on a linux system with kernel 2.4.20, and I
got the error messages now and again when start a new process, the
frequence is get higher as the heavity, but all the running processes
is ok.

I don't know what's the problem?

Code: 8b 51 04 83 fa ff 0f 84 56 01 00 00 83 fa fc 77 07 c7 41 04
 <1>Unable to handle kernel NULL pointer dereference at virtual
address 00000004
 printing eip:
dfd7d718
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<dfd7d718>]    Not tainted
EFLAGS: 00010286
eax: bffffd44   ebx: ddd16000   ecx: 00000000   edx: ddd16000
esi: c0106c33   edi: 0000000b   ebp: ddd17fb8   esp: ddd17f84
ds: 0018   es: 0018   ss: 0018
Process killall (pid: 32346, stackpage=ddd17000)
Stack: ddd16000 c0106c33 0000000b 00000000 da3a9000 0000000b ddd17fbc
c0105987
       bffffd44 c01059a7 00000000 00000a3a 00000020 bffff934 dfd7d8e8
00000000
       00000000 00000000 00000000 00000000 00000000 00000000 00000000
0000002b
Call Trace:    [<c0106c33>] [<c0105987>] [<c01059a7>]