Error repeating endlessly in the log

["Greg Thompson" <greg@grinc.org>]

Hi group,

Please excuse my ignorance, but I can not find a useful article about this
on the web. I'm definitely no kernel expert, so I figured I'd post to this
group about a strange error I just started seeing on my Linux machine today
for no apparent reason (meaning, I didn't do anything odd that would
logically make the problem happen).
When I go to an event viewer, the following (copied and pasted below) is
constantly being written to the log. What is this and how would one go about
fixing it? I didn't do anything except reboot and now all of a sudden it is
doing this. Nothing seems messed up or anything but obviously something is
very wrong here...its writing thousands of log entries per minute!
The following is a snippit of the log; any help on this matter would be MUCH
appreciated...this is a very important computer (yes, it is an SMP machine)
please CC or send me any replies directly to greg@grinc.org:

06/19 16:43:14 Kernel Warning kernel 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
06/19 16:43:14 Kernel Warning kernel cfb6ef35 00000a3a 00000020
c21e0000 c0109003 0000000b bfffc85c cfb6d99c
06/19 16:43:14 Kernel Warning kernel Stack: ffffffff ffffffff
ffffffff 00000000 00000013 00000282 bffffde4 00000000
06/19 16:43:14 Kernel Warning kernel Process netserv (pid: 30409,
stackpage=c21e1000)
06/19 16:43:14 Kernel Warning kernel ds: 0018 es: 0018 ss: 0018
06/19 16:43:14 Kernel Warning kernel esi: c0109003 edi: 0000000b ebp:
c21e1fb8 esp: c21e1f80
06/19 16:43:14 Kernel Warning kernel eax: bffffde4 ebx: c21e0000 ecx:
c1312000 edx: 00000000
06/19 16:43:14 Kernel Warning kernel EFLAGS: 00010202
06/19 16:43:14 Kernel Warning kernel EIP: 0010:
[serial:__insmod_serial_O/lib/modules/2.4.19-x1-smp/kernel/drivers/+-
15062950/96] Tainted: P
06/19 16:43:14 Kernel Warning kernel CPU: 0
06/19 16:43:14 Kernel Warning kernel Oops: 0000
06/19 16:43:14 Kernel Warning kernel cfb6d85a
06/19 16:43:14 Kernel Warning kernel printing eip:
06/19 16:43:14 Kernel Warning kernel <1>Unable to handle kernel NULL
pointer dereference at virtual address 00000000
06/19 16:43:14 Kernel Warning kernel Code: 8a 02 84 c0 75 ef e8 9c ec
ff ff 89 c2 80 3a 00 0f 84 bb 00
06/19 16:43:14 Kernel Warning kernel
06/19 16:43:14 Kernel Warning kernel Call Trace: [system_call+51/64]
06/19 16:43:14 Kernel Warning kernel 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
06/19 16:43:14 Kernel Warning kernel Call Trace: [<0b bfffc85c
cfb6d99c
06/19 16:43:14 Kernel Warning kernel 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
06/19 16:43:14 Kernel Warning kernel cfb6ef35 00000a3a 00000020
c21e0000 c0109003 0000000b bfffc85c cfb6d99c
06/19 16:43:14 Kernel Warning kernel Stack: ffffffff ffffffff
ffffffff 00000000 00000013 00000282 bffffde4 00000000
06/19 16:43:14 Kernel Warning kernel Process netserv (pid: 30316,
stackpage=c21e1000)
06/19 16:43:14 Kernel Warning kernel ds: 0018 es: 0018 ss: 0018
06/19 16:43:14 Kernel Warning kernel esi: c0109003 edi: 0000000b ebp:
c21e1fb8 esp: c21e1f80
06/19 16:43:14 Kernel Warning kernel eax: bffffde4 ebx: c21e0000 ecx:
c1312000 edx: 00000000
06/19 16:43:14 Kernel Warning kernel EFLAGS: 00010202
06/19 16:43:14 Kernel Warning kernel EIP: 0010:
[serial:__insmod_serial_O/lib/modules/2.4.19-x1-smp/kernel/drivers/+-
15062950/96] Tainted: P
06/19 16:43:14 Kernel Warning kernel CPU: 1
06/19 16:43:14 Kernel Warning kernel Oops: 0000