Re: [Openvpn-users] Re: Openvpn (v2.0.7) crashing my box

[David Rosenstrauch <darose@xxxxxxxxxx>]

Charles Duffy wrote:
> First: Take down the backtrace. Photograph the screen, set up a serial 
> console to a separate machine, do remote logging, whatever. Just knowing 
> that you see openvpn somewhere in there isn't enough: OpenVPN, being a 
> userspace program, can't crash your machine that hard itself; rather, 
> there's some kernelspace code implicated, and we need the backtrace to 
> know just what.

You're right, obviously, and I guess I should have assumed that.  Still, 
I figured I'd post whatever details I had in case this was something 
people had been seeing a lot of lately and there was a simple answer 
like "enable the fizbobulator setting in your config if you're having 
this problem".

I'll make certain to capture this stuff next time I see it.  Although 
hopefully there won't *be* a next time.  I changed some of the ping 
options on both the client and server recently - plus my kernel's been 
upgraded since the last time this happened - so maybe this will just go 
away automagically.  (Although I highly doubt that.)


> Second: Test your RAM

Will do.  I'll run the memtest86+ tests tonight.  I'd be surprised if 
RAM was the problem since 1) the box is not that old, and 2) the box has 
been totally rock solid otherwise, and hasn't exhibited any other 
problems like this.  Still, I might as well rule this out.

> and try a different kernel. Since nobody else has 
> seen this before, it's almost certain that it's something specific to 
> your system; probably bad hardware or a bug in the (extremely new) 
> kernel you're running -- either the tap driver, the ethernet driver, or 
> something else.

My guess is that of the things you mentioned a kernel issue is probably 
the most likely, but who knows.

By the way, I'm using the tun driver, not tap.  And ethernet driver on 
the server that's crashing is e1000.  (Yes I'm using gigabit ethernet on 
the server's LAN.  Forgot to mention that earlier, and don't know if 
that's of any relevance.)

Thanks for the suggestions!  Will report back more info as I have it.

DR

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