Comment 0 for bug 1877159

This morning, our 2 Bionic machine configured with the wireguard's PPA and using systemd-networkd to configure the wireguard tunnel started misbehaving. Why this started just now is unclear ATM but their dmesg was filled with this:

validate_nla: 100 callbacks suppressed
netlink: 'systemd-network': attribute type 5 has an invalid length.
netlink: 'systemd-network': attribute type 5 has an invalid length.
netlink: 'systemd-network': attribute type 5 has an invalid length.
netlink: 'systemd-network': attribute type 5 has an invalid length.
netlink: 'systemd-network': attribute type 5 has an invalid length.
netlink: 'systemd-network': attribute type 5 has an invalid length.
netlink: 'systemd-network': attribute type 5 has an invalid length.
netlink: 'systemd-network': attribute type 5 has an invalid length.
netlink: 'systemd-network': attribute type 5 has an invalid length.
netlink: 'systemd-network': attribute type 5 has an invalid length.

Folks in #systemd mentioned https://github.com/systemd/systemd/issues/11575 which points to 2 commits missing from Bionic's systemd version:

https://github.com/systemd/systemd/commit/7d0b26a027118ca063780421cb31c74e9d2664ee
https://github.com/systemd/systemd/commit/624a47694cad4c87b2e807c32db656f3e9d679c5

Focal's systemd have the above commits. Would it be possible to backport those 2 commits to Bionic?

Additional information:

# uname -a
Linux noc-eu1 4.15.0-99-generic #100-Ubuntu SMP Wed Apr 22 20:32:56 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

# apt-cache policy systemd wireguard{,-tools,-dkms}
systemd:
  Installed: 237-3ubuntu10.39
  Candidate: 237-3ubuntu10.39
  Version table:
 *** 237-3ubuntu10.39 500
        500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     237-3ubuntu10.38 500
        500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages
     237-3ubuntu10 500
        500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
wireguard:
  Installed: 1.0.20200319-1ubuntu1~18.04
  Candidate: 1.0.20200319-1ubuntu1~18.04
  Version table:
 *** 1.0.20200319-1ubuntu1~18.04 500
        500 http://ppa.launchpad.net/wireguard/wireguard/ubuntu bionic/main amd64 Packages
        500 http://ppa.launchpad.net/wireguard/wireguard/ubuntu bionic/main i386 Packages
        100 /var/lib/dpkg/status
wireguard-tools:
  Installed: 1.0.20200319-1ubuntu1~18.04
  Candidate: 1.0.20200319-1ubuntu1~18.04
  Version table:
 *** 1.0.20200319-1ubuntu1~18.04 500
        500 http://ppa.launchpad.net/wireguard/wireguard/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status
wireguard-dkms:
  Installed: 1.0.20200429-2~18.04
  Candidate: 1.0.20200429-2~18.04
  Version table:
 *** 1.0.20200429-2~18.04 500
        500 http://ppa.launchpad.net/wireguard/wireguard/ubuntu bionic/main amd64 Packages
        500 http://ppa.launchpad.net/wireguard/wireguard/ubuntu bionic/main i386 Packages
        100 /var/lib/dpkg/status