[strongSwan] StrongSwan 5.8.2 - received netlink error: Invalid argument (22)

Houman houmie at gmail.com
Mon Jul 6 10:34:04 CEST 2020

Hi Tobias,

We have two types of servers. Same users are doing ok on servers with
StrongSwan 5.7.2 on kernel  5.3.0-53-generic.

But on the servers with StrongSwan 5.8.2 with kernel* 5.4.0-39-generic, *the
issue arises. (Not for all users, but quite a few)

increase the log level for knl to 2 to see which operation failed

May you please elaborate a bit more how to change the log level for knl? In
which config do I do that?

Many Thanks,

On Mon, 6 Jul 2020 at 09:20, Tobias Brunner <tobias at strongswan.org> wrote:

> Hi,
> > I'm seeing a strange error in StrongSwan U5.8.2/K5.4.0-39-generic
> > (Ubuntu 20.04).
> > I don't get this error with StrongSwan U5.7.2/K5.3.0-53-generic (Ubuntu
> > 19.10).
> In the same situation (i.e. if a client's IP address changes)?  Or just
> in general?  Can you replicate this error?
> > received netlink error: Invalid argument (22)
> As the error indicates, this is returned by the kernel if it doesn't
> like the provided data.  Either when querying the existing SA or when
> replacing it with updated IP addresses (increase the log level for knl
> to 2 to see which operation failed).  Also, what kernel version are you
> using?
> Regards,
> Tobias
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