[CentOS] Kernel panic - where to go from here?

Mike azmr at earthlink.net
Wed Nov 28 19:27:34 UTC 2007

CentOS 5 has been running continuously since 9/21 on my "do everything" home
server (with the exception of a kernel update).  It's a fairly old Athlon
machine that serves as a firewall and various servers (dovecot, samba, NFS,
dhcp, OpenVPN, etc).

I connected via OpenVPN about a week ago and discovered I get a kernel panic.
I've since found that this is very repeatable and happens only after being 
connected via OpenVPN for about 4 hours or so.

I was able to manually copy the stuff on the console after the panic (see below).
I googled "unable to handle kernel paging request" and didn't really find
anything useful (to me).

I've tried both kernel version 2.6.18-8.1.14.el5 and 2.6.18-8.1.15.el5 as well
as OpenVPN versions 2.1_rc4-1 and 2.0.9 all with the same results.

Not sure where to go with this(?).  Should I post this on a kernel mailing
list?  Or somewhere else?

Call Trace:
   [<C040502c>] dump_trace+0x8c/0x96
   [<c0405046>] show_trace_log_lvl+0x10/0x20
   [<c04050e2>] show_stack_log_lvl+0x8c/0x94
   [<c040520f>] show_registers+0x125/0x191
   [<c0404c3b>] kernel_thread_helper+0x7/0x10
   [<c0405411>] die+0x196/0x296
   [<c05fd73f>] do_page_fault+0x3ea/0x4b8
   [<c0434d15>] kthread+0x0/0xeb
   [<c05fd355>] do_page_fault+0x0/0x4b8
   [<c0404a71>] error_code+0x39/0x40
   [<c0434d15>] kthread+0x0/0xeb
   [<c0404c3b>] kernel_thread_helper+0x7/0x10
BUG: unable to handle kernel paging request at virtual address c0613dbf
Printing eip:
   *pde = 2f9b5163
Recursive die() failure, output suppressed
   <0>Kernel panic - not syncing: Fatal exception

-- Thanks, Mike

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