crash with Unknown KMP message 300

[David Woodhouse]

On Thu, 2018-01-11 at 10:44 +0000, Jerry van Kooten wrote:
> 
> OpenConnect gives me these messages and then crashes:
> 
> 
> Unrecognised data packet
> Unknown KMP message 300 of size 1427:
> RTNETLINK answers: No such process
> RTNETLINK answers: No such process

The 'Unrecognised data packet' message means that it wasn't either IPv6
or Legacy IP; it was something else.

I wonder if this might happen if there was an MTU issue and we got out
of sync on a previous packet. Can you reproduce with '-v' and show the
last output *including* the packet before this happens?

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