Hi Flo,

On 10/06/14 14:37, Florent B wrote:
> Hi all,
>
> I come back to you with a 100% CPU problem.
>
> I had a similar problem with Padlock hardware, which was not resolved.
>
> But now I have the exact same problem with an Intel CPU, so I'm thinking
> that OpenVPN Client is the cause.
>
> Now, when I run OpenVPN using attached config, openvpn process is
> heating 100% CPU. Log is also attached.
> I run it with --route-noexec as testing purpose so don't care about
> routing warnings.
>
> Is someone can help me to find the problem ? :)
>
> I tested with OpenVPN 2.3.2 and problem is still present....
>
>

this is a misconfiguration in openvpn: you've been misconfigured such 
that you are "biting your own tail". The warning from the connection log

Tue Jun 10 14:34:09 2014 us=571043 PUSH: Received control message: 
'PUSH_REPLY,route 46.246.33.130 255.255.255.255 net_gateway,route-gateway 
46.246.33.1,redirect-gateway def1,topology subnet,dhcp-option DOMAIN 
ipredator.se,dhcp-option DNS 46.246.46.46,dhcp-option DNS 
194.132.32.23,ip-win32 dynamic,ping 10,ping-restart 60,explicit-exit-notify 
3,ifconfig 46.246.33.193 255.255.255.0'
Tue Jun 10 14:34:09 2014 us=571118 Options error: Unrecognized option or 
missing parameter(s) in [PUSH-OPTIONS]:8: ip-win32 (2.2.1)
[...]
Tue Jun 10 14:34:09 2014 us=571199 WARNING: potential conflict between --remote 
address [46.246.33.130] and --ifconfig address pair [46.246.33.193, 
255.255.255.0] -- this is a warning only that is triggered when local/remote 
addresses exist within the same /24 subnet as --ifconfig endpoints. (silence 
this warning with --ifconfig-nowarn)
Tue Jun 10 14:34:09 2014 us=571338 ROUTE default_gateway=94.23.6.254
Tue Jun 10 14:34:09 2014 us=571793 TUN/TAP device tun0 opened
Tue Jun 10 14:34:09 2014 us=571814 TUN/TAP TX queue length set to 100
Tue Jun 10 14:34:09 2014 us=571827 do_ifconfig, tt->ipv6=0, 
tt->did_ifconfig_ipv6_setup=0
Tue Jun 10 14:34:09 2014 us=571848 /sbin/ifconfig tun0 46.246.33.193 netmask 
255.255.255.0 mtu 1500 broadcast 46.246.33.255
Tue Jun 10 14:34:09 2014 us=573232 /etc/openvpn/iPredator-connect.sh tun0 1500 
1558 46.246.33.193 255.255.255.0 init
dhcp-option DOMAIN ipredator.se


tells me that you're handing out IPs in the same range as the OpenVPN 
server itself. This is possible but tricky. without further info on your 
network setup and config files it is impossible to tell exactly what is 
happening here, however.

HTH,

JJK


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