Oops/Panic in 2.4.7

[Brian]

Affter about a week, our main web server coughed up at least four
	Unable to handle kernel NULL pointer dereference at virtual address...
(klogd or syslogd died during the 4th) followed by a
	Unable to handle kernel paging request at virtual address ef2a571c
It finally died with
	Kernel panic: Attempted to kill init!

This kernel was compiled as UP w/modules disabled on
	gcc version 2.95.4 20010721 (Debian prerelease)
We have also crashed 2.4.4 and 2.4.6 (both made with 2.95.2) within 
the past month, but I didn't drive out to get an oops from those.

The server is a basic P3/750 with 512MB RAM and no swap (it was 
pretty much just getty and portmap in there, anyway).

This is the last complete oops in syslog:
ksymoops 2.4.1 on i686 2.4.7.  Options used
     -v /tmp/vmlinux (specified)
     -K (specified)
     -L (specified)
     -O (specified)
     -m /System.map (specified)

Unable to handle kernel NULL pointer dereference at virtual address 00000008
c0136a40
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[do_pollfd+20/136]
EFLAGS: 00010297
eax: 00000008   ebx: 00000000   ecx: 00000001   edx: c2fa88c0
esi: 00000000   edi: 00000008   ebp: 00000000   esp: d94adf20
ds: 0018   es: 0018   ss: 0018
Process httpd (pid: 18289, stackpage=d94ad000)
Stack: 00000000 00000000 bfff3dd8 000001f4 c0136b39 00000001 00000008 d94adf58
       d94adf5c 00000001 00000000 bfff3dd8 d94adfbc d94ac000 00000000 00000000
       c0136d8d 00000001 00000000 00000001 c2fa88c0 d94adfb4 000001f5 d94ac000
Call Trace: [do_poll+133/220] [sys_poll+509/784] [sys_socketcall+281/512] [system_call+51/56]
Code: 8b 07 31 f6 85 c0 7c 56 e8 5b 2e ff ff 89 c3 be 20 00 00 00
Using defaults from ksymoops -t elf32-i386 -a i386

Code;  00000000 Before first symbol
00000000 <_EIP>:
Code;  00000000 Before first symbol
   0:   8b 07                     mov    (%edi),%eax
Code;  00000002 Before first symbol
   2:   31 f6                     xor    %esi,%esi
Code;  00000004 Before first symbol
   4:   85 c0                     test   %eax,%eax
Code;  00000006 Before first symbol
   6:   7c 56                     jl     5e <_EIP+0x5e> 0000005e Before first symbol
Code;  00000008 Before first symbol
   8:   e8 5b 2e ff ff            call   ffff2e68 <_EIP+0xffff2e68> ffff2e68 <END_OF_CODE+3fdc3410/????>
Code;  0000000d Before first symbol
   d:   89 c3                     mov    %eax,%ebx
Code;  0000000f Before first symbol
   f:   be 20 00 00 00            mov    $0x20,%esi

This is the oops immediately before the panic:
ksymoops 2.4.1 on i686 2.4.7.  Options used
     -v /tmp/vmlinux (specified)
     -K (specified)
     -L (specified)
     -O (specified)
     -m /System.map (specified)

Unable to handle kernel paging request at virtual address ef2a571c
c01210bc
*pde = 00000000
Oops: 0000
CPU:    0
EIP:    0010:[<c01210bc>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010082
eax: 081d70c1   ebx: c1881d40   ecx: df298c80   edx: ceb49400
esi: 00000292   edi: 000000f0   ebp: bffff80c   esp: c188bf54
ds: 0018   es: 0018   ss: 0018
Process init (pid: 1, stackpage=c188b000)
Stack: 0804dee7 fffffff4 c188bfa4 c013211c c1881d40 000000f0 c188bfa4 bffff84c
       c188bfa4 c013301d 0804dee7 c188bfa4 bffff84c 0804dee7 c012ff16 0804dee7
       00000009 c188bfa4 c188a000 bffff84c 00000000 c81fdee0 c81fdee4 c81fdee8
Call Trace: [<c013211c>] [<c013301d>] [<c012ff16>] [<c0106afb>]
Code: 8b 44 82 18 89 42 14 83 f8 ff 75 08 8b 02 89 43 08 8d 76 00
 
>>EIP; c01210bc <kmem_cache_alloc+24/54>   <=====
Trace; c013211c <getname+1c/9c>
Trace; c013301d <__user_walk+11/58>
Trace; c012ff16 <sys_newstat+16/70>
Trace; c0106afb <system_call+33/38>
Code;  c01210bc <kmem_cache_alloc+24/54>
00000000 <_EIP>:
Code;  c01210bc <kmem_cache_alloc+24/54>   <=====
   0:   8b 44 82 18               mov    0x18(%edx,%eax,4),%eax   <=====
Code;  c01210c0 <kmem_cache_alloc+28/54>
   4:   89 42 14                  mov    %eax,0x14(%edx)
Code;  c01210c3 <kmem_cache_alloc+2b/54>
   7:   83 f8 ff                  cmp    $0xffffffff,%eax
Code;  c01210c6 <kmem_cache_alloc+2e/54>
   a:   75 08                     jne    14 <_EIP+0x14> c01210d0 <kmem_cache_alloc+38/54>
Code;  c01210c8 <kmem_cache_alloc+30/54>
   c:   8b 02                     mov    (%edx),%eax
Code;  c01210ca <kmem_cache_alloc+32/54>
   e:   89 43 08                  mov    %eax,0x8(%ebx)
Code;  c01210cd <kmem_cache_alloc+35/54>
  11:   8d 76 00                  lea    0x0(%esi),%esi

Thanks,
	-- Brian