I get "Unable to handle kernal paging request" in syslog for about 3-4
seconds and then the machine just dies.
I am running 2.0.33 with SYN flooding turned on and IP Aliasing turned on
(although Aliasing is not being used), a Pentium II 233 on a QDI Legend -
V motherboard, 128 megs of sdram and 128 megs of swap. I am using a 3com
Vortex 100mbit ethernet card. The main use of the machine is running the
latest Apache server.. it's a web site that gets about 50,000 hits a day
and runs quite a few cgi's throughout the day (maybe 3000 or so). The
cgi's are in Perl 5.004_03. The system was installed with the latest
slackware and then the kernel was updated.
I have checked everything I can think of, I have changed the memory
completely... same problem. Have turned off the swap, same problem.
Changed the video card (was using a really oldddd video card -- it was a
shot in the dark)... no difference. #linux users couldn't narrow it down ,
i have heard it could be anything from hardware, to patches to attacks.
I did NOT have kerneld compiled in the kernel but found kerneld running in
one of the rc.d files today, and after noticing the first line in the
syslog (shown below), I removed this from running... could this have been
a problem or is 'kerneld: exitting' just because the system is dying?... i
am not using any modules.
Could I be getting attacked via internet? Some people mentioned nestea,
but the error reports mentioned in the info i read said nothing about
kernel paging requests. Below is the syslog report, This one is slightly
different than the rest. This one has a 30 second pause after the first
one before the next one happens.. normally the machine just hoses in 3-4
seconds.
Any ideas?... this is really frustrating! I have been running 2.0.33
forever on another machine with no crashes at all.
Thanks for any help!
-John
May 3 12:14:35 www kerneld: error: exit: Identifier removed
May 3 12:14:35 www kernel: Unable to handle kernel paging request at
virtual ad
dress ef3c2a3b
May 3 12:14:35 www kernel: current->tss.cr3 = 00101000, ^Lr3 = 00101000
May 3 12:14:35 www kernel: *pde = 00000000
May 3 12:14:35 www kernel: current->tss.cr3 = 00101000, ^Lr3 = 00101000
May 3 12:14:35 www kernel: *pde = 00000000
May 3 12:15:02 www kernel: Unable to handle kernel paging request at
virtual ad
dress e0656854
May 3 12:15:02 www kernel: current->tss.cr3 = 07da9000, ^Lr3 = 07da9000
May 3 12:15:02 www kernel: *pde = 00000000
May 3 12:15:02 www kernel: current->tss.cr3 = 07da9000, ^Lr3 = 07da9000
May 3 12:15:02 www kernel: *pde = 00000000
May 3 12:15:02 www kernel: Unable to handle kernel paging request at
virtual ad
dress ece5f000
May 3 12:15:02 www kernel: current->tss.cr3 = 00101000, ^Lr3 = 00101000
May 3 12:15:02 www kernel: *pde = 00000000
May 3 12:15:02 www kernel: current->tss.cr3 = 00101000, ^Lr3 = 00101000
May 3 12:15:02 www kernel: *pde = 00000000
May 3 12:15:13 www kernel: Unable to handle kernel paging request at
virtual ad
dress f034202e
May 3 12:15:13 www kernel: current->tss.cr3 = 00101000, ^Lr3 = 00101000
May 3 12:15:13 www kernel: *pde = 00000000
May 3 12:15:13 www kernel: current->tss.cr3 = 00101000, ^Lr3 = 00101000
May 3 12:15:13 www kernel: *pde = 00000000
May 3 12:15:39 www kernel: Unable to handle kernel paging request at
virtual ad
dress db9c18e5
May 3 12:15:39 www kernel: current->tss.cr3 = 00101000, ^Lr3 = 00101000
May 3 12:15:39 www kernel: *pde = 00000000
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