Comment # 3 on bug 1229028 from Antonio Feijoo

(In reply to Holger Sickenberg from comment #0)
> That lead me to:
> https://github.com/dracutdevs/dracut/issues/2661
> and
> https://github.com/gsauthof/dracut-sshd/pull/79
> but even using the package from
> https://build.opensuse.org/package/show/home:darix:apps/dracut-sshd
> did not improve the situation (same errors)

This is a fix for OpenSSH 9.8, so this cannot be the problem (you're using Leap
15.6, and Tumbleweed does not ship this version yet).

> After reboot I can connect from another host to the system, but after connection is being enabled, shell is terminating with error:
>   munmap_chunk(): invalid pointer

This can be an error in openssh or systemd-networkd?. You haven't attached the
journalctl log. I have some pending work to do after my vacation, I'll take a
look at it when I have time and try to reproduce it.

Meanwhile, could you try setting up `network-legacy` or `network-manager`
instead of `systemd-networkd`? In these cases it should not be necessary to
install something like `20-wired.network`, adding `ip=eth0:dhcp` to the kernel
command line should be sufficient.