Kernel Oops

[Lazar Fleysher <fleysher@chudo.lanl.gov>]

Hi everybody

I have noticed in /var/log/kern.log
the following message: ( system slink kernel 2.0.38)

Sep  9 12:03:39 zoroport kernel: Serial driver version 4.13p1 with no
serial opt
ions enabled 
Sep  9 12:03:40 zoroport kernel: ttyS00 at 0x03f8 (irq = 4) is a 16450 
Sep  9 12:03:40 zoroport kernel: ttyS01 at 0x02f8 (irq = 3) is a 16450 
Sep  9 16:48:13 zoroport kernel: Unable to handle kernel NULL pointer
dereferenc
e at virtual address c0000000 
Sep  9 16:48:13 zoroport kernel: current->tss.cr3 = 00101000, %cr3 =
00101000 
Sep  9 16:48:13 zoroport kernel: *pde = 00102067 
Sep  9 16:48:13 zoroport kernel: *pte = 00000000 
Sep  9 16:48:13 zoroport kernel: Oops: 0000 
Sep  9 16:48:13 zoroport kernel: CPU:    0 



and /var/log/messages:

Sep  9 12:03:40 zoroport kernel: ttyS00 at 0x03f8 (irq = 4) is a 16450 
Sep  9 12:03:40 zoroport kernel: ttyS01 at 0x02f8 (irq = 3) is a 16450 
Sep  9 15:22:26 zoroport -- MARK --
Sep  9 15:42:26 zoroport -- MARK --
Sep  9 16:02:26 zoroport -- MARK --
Sep  9 16:22:27 zoroport -- MARK --
Sep  9 16:42:27 zoroport -- MARK --
Sep  9 16:48:13 zoroport kernel: Oops: 0000 
Sep  9 16:48:13 zoroport kernel: CPU:    0 
Sep  9 17:02:27 zoroport -- MARK --
Sep  9 17:22:27 zoroport -- MARK --


Could someone tell what this is and how to respond to such things...
Is it a hardware problem or software?

Thank you

Lazar

PS There is a "hole" in time because the system had contacted a time
server and adjusted its time...