/var/log/messages important

Hi all
my 7.2 linux machine gave me this error and ver
allowed anybody to login there after what can be
reason???
here is the error....

May 25 17:10:38 medusa4 kernel: Unable to handle
kernel NULL pointer dereference at virtual addres
s 00000018
May 25 17:10:38 medusa4 kernel:  printing eip:
May 25 17:10:38 medusa4 kernel: d085b5c7
May 25 17:10:38 medusa4 kernel: *pde = 00000000
May 25 17:10:38 medusa4 kernel: Oops: 0000
May 25 17:10:38 medusa4 kernel: CPU:    0
May 25 17:10:38 medusa4 kernel: EIP:   
0010:[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/ke
rnel/drivers/net+-162361/96]
May 25 17:10:38 medusa4 kernel: EIP:   
0010:[<d085b5c7>]
May 25 17:10:38 medusa4 kernel: EFLAGS: 00010282
May 25 17:10:38 medusa4 kernel: eax: cc564da0   ebx:
00000000   ecx: cfb41694   edx: cfb41600
May 25 17:10:38 medusa4 kernel: esi: 00000000   edi:
cb426360   ebp: c56796c0   esp: c48e5c34
May 25 17:10:38 medusa4 kernel: ds: 0018   es: 0018  
ss: 0018
May 25 17:10:38 medusa4 kernel: Process cp (pid: 5257,
stackpage=c48e5000)
May 25 17:10:38 medusa4 kernel: Stack: 00000000
cfb41600 cb426360 d0855e96 00000000 cb426360 00000
000 cb426360
May 25 17:10:38 medusa4 kernel:        c56796c0
d0866148 cb426360 00000000 00001000 00000303 00000
000 00000176
May 25 17:10:38 medusa4 kernel:        00000000
00000000 08051a28 08051a28 00000000 00000018 00000
018 ffffffff
May 25 17:10:38 medusa4 kernel: Call Trace:
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/ker
nel/drivers/net+-184682/96]
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/drivers/net+
-118456/96] [clear_user+43/64]
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/drivers/n
et+-117965/96]
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/drivers/net+-187521/96]
May 25 17:10:38 medusa4 kernel: Call Trace:
[<d0855e96>] [<d0866148>] [<c02048db>] [<d0866333>] [<
d085537f>]
May 25 17:10:38 medusa4 kernel:   
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/drive
rs/net+-116922/96]
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/drivers/net+-113574/9
6] [truncate_inode_pages+143/160]
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/driver
s/net+-117232/96] [vmtruncate+361/384]
[inode_setattr+38/224]

May 25 17:10:38 medusa4 kernel:   
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/drive
rs/net+-116922/96]
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/drivers/net+-113574/9
6] [truncate_inode_pages+143/160]
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/driver
s/net+-117232/96] [vmtruncate+361/384]
[inode_setattr+38/224]
May 25 17:10:38 medusa4 kernel:    [<d0866746>]
[<d086745a>] [<c0126a6f>] [<d0866610>] [<c01248a9>
] [<c014a086>]
May 25 17:10:38 medusa4 kernel:   
[eepro100:__insmod_eepro100_O/lib/modules/2.4.7-10/kernel/drive
rs/net+-113880/96] [bread+70/112]
[notify_change+94/288] [cached_lookup+16/80]
[do_truncate+107/16
0] [<f42f9d10>]
May 25 17:10:38 medusa4 kernel:    [<d0867328>]
[<c0137506>] [<c014a20e>] [<c013f860>] [<c0133e0b>
] [<f42f9d10>]
May 25 17:10:38 medusa4 kernel:   
[open_namei+1109/1456] [<d088be3a>]
[path_release+16/48] [filp_
open+54/96] [getname+94/160] [sys_open+54/176]
May 25 17:10:38 medusa4 kernel:    [<c0140c75>]
[<d088be3a>] [<c013f830>] [<c0134d16>] [<c013f63e>
] [<c0135006>]
May 25 17:10:38 medusa4 kernel:    [<d088c434>]
[sys_munmap+50/80] [system_call+51/56]
May 25 17:10:38 medusa4 kernel:    [<d088c434>]
[<c0125ee2>] [<c0106f0b>]
May 25 17:10:38 medusa4 kernel:
May 25 17:10:38 medusa4 kernel: Code: f6 46 18 80 74
08 8b 5e 40 e9 bf 00 00 00 8b 46 10 85 c0 7f
May 25 17:15:21 medusa4 login(pam_unix)[5277]: check
pass; user unknown
May 25 17:15:21 medusa4 login(pam_unix)[5277]:
authentication failure; logname= uid=0 euid=0 tty=p
ts/2 ruser= rhost=venus
May 25 17:15:23 medusa4 login[5277]: FAILED LOGIN 1
FROM venus FOR m2009^I, Authentication failure
May 25 17:15:35 medusa4 login(pam_unix)[5277]: session
opened for user m2009 by (uid=0)
May 25 17:15:35 medusa4  -- m2009[5277]: LOGIN ON
pts/2 BY m2009 FROM venus
May 25 17:15:38 medusa4 xdm(pam_unix)[5252]: session
closed for user m2009
May 25 17:30:11 medusa4 xdm(pam_unix)[4769]: session
closed for user d410
May 26 09:15:26 medusa4 xinetd[920]: telnet: fork
failed: Resource temporarily unavailable (errno
= 11)
May 26 09:15:36 medusa4 xinetd[920]: warning: cannot
open /etc/hosts.allow: Interrupted system cal
l




This error comes in booting.....
May 26 11:02:13 medusa4 xinetd[920]: service telnet:
too many consecutive fork failures
May 26 11:12:27 medusa4 syslogd 1.4.1: restart.
May 26 11:12:27 medusa4 syslog: syslogd startup
succeeded
May 26 11:12:27 medusa4 syslog: klogd startup
succeeded
May 26 11:12:27 medusa4 kernel: klogd 1.4.1, log
source = /proc/kmsg started.
May 26 11:12:27 medusa4 kernel: Inspecting
/boot/System.map-2.4.7-10
May 26 11:12:27 medusa4 kernel: Loaded 15046 symbols
from /boot/System.map-2.4.7-10.
May 26 11:12:27 medusa4 kernel: Symbols match kernel
version 2.4.7.
May 26 11:12:27 medusa4 kernel: Loaded 180 symbols
from 5 modules.
May 26 11:12:27 medusa4 kernel: Linux version 2.4.7-10
([email protected]) (gcc
 version 2.96 20000731 (Red Hat Linux 7.1 2.96-98)) #1
Thu Sep 6 17:27:27 EDT 2001
May 26 11:12:27 medusa4 kernel: BIOS-provided physical
RAM map:
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
0000000000000000 - 000000000009fc00 (usable)
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
000000000009fc00 - 00000000000a0000 (reserved)
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
00000000000e0000 - 0000000000100000 (reserved)
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
0000000000100000 - 000000000ffc0000 (usable)
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
000000000ffc0000 - 000000000fff8000 (ACPI data)
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
000000000fff8000 - 0000000010000000 (ACPI NVS)
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
00000000fec00000 - 00000000fec01000 (reserved)
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
00000000fee00000 - 00000000fee01000 (reserved)
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
00000000ffb80000 - 00000000ffc00000 (reserved)
May 26 11:12:27 medusa4 kernel:  BIOS-e820:
00000000fff00000 - 0000000100000000 (reserved)
May 26 11:12:27 medusa4 kernel: Scanning bios EBDA for
MXT signature
May 26 11:12:27 medusa4 kernel: On node 0 totalpages:
65472
May 26 11:12:27 medusa4 kernel: zone(0): 4096 pages.
May 26 11:12:27 medusa4 kernel: zone(1): 61376 pages.
May 26 11:12:27 medusa4 kernel: zone(2): 0 pages.
May 26 11:12:27 medusa4 kernel: Kernel command line:
ro root=/dev/hda1
May 26 11:12:27 medusa4 kernel: Initializing CPU#0
May 26 11:12:27 medusa4 portmap: portmap startup
succeeded
May 26 11:12:27 medusa4 kernel: Detected 1594.874 MHz
processor.
May 26 11:12:27 medusa4 kernel: Console: colour VGA+
80x25
May 26 11:12:27 medusa4 kernel: Calibrating delay
loop... 3185.04 BogoMIPS

ed, 90k data, 220k init, 0k highmem)
May 26 11:12:27 medusa4 kernel: Dentry-cache hash
table entries: 32768 (order: 6, 262144 bytes)
May 26 11:12:27 medusa4 kernel: Inode-cache hash table
entries: 16384 (order: 5, 131072 bytes)
May 26 11:12:27 medusa4 kernel: Mount-cache hash table
entries: 4096 (order: 3, 32768 bytes)
May 26 11:12:27 medusa4 kernel: Buffer-cache hash
table entries: 16384 (order: 4, 65536 bytes)
May 26 11:12:27 medusa4 kernel: Page-cache hash table
entries: 65536 (order: 7, 524288 bytes)
May 26 11:12:27 medusa4 kernel: CPU: L1 I cache: 12K,
L1 D cache: 8K
May 26 11:12:27 medusa4 kernel: CPU: L2 cache: 256K
May 26 11:12:27 medusa4 kernel: Intel machine check
architecture supported.
May 26 11:12:27 medusa4 kernel: Intel machine check
reporting enabled on CPU#0.
May 26 11:12:27 medusa4 kernel: CPU: Intel(R)
Pentium(R) 4 CPU 1.60GHz stepping 02
May 26 11:12:27 medusa4 kernel: Enabling fast FPU save
and restore... done.
May 26 11:12:27 medusa4 kernel: Enabling unmasked SIMD
FPU exception support... done.
May 26 11:12:27 medusa4 kernel: Checking 'hlt'
instruction... OK.



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