Comment 21 for bug 2013543

Hm, I think we do have enough evidence to link the two problems.

Nick pinged me to let me know that he'd prepared a PPA with the backported upstream patch, and asked if I could test it on horsea. I did that, and verified that the new systemd package fixes the problem:

ubuntu@node-horsea:~$ sudo systemctl status ssh
● ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
     Active: active (running) since Fri 2023-08-04 18:47:55 UTC; 2min 35s ago
       Docs: man:sshd(8)
             man:sshd_config(5)
    Process: 884 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
   Main PID: 901 (sshd)
      Tasks: 1 (limit: 38215)
     Memory: 7.7M
        CPU: 84ms
     CGroup: /system.slice/ssh.service
             └─901 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups"

Aug 04 18:47:55 node-horsea systemd[1]: Starting OpenBSD Secure Shell server...
Aug 04 18:47:55 node-horsea sshd[901]: Server listening on 0.0.0.0 port 22.
Aug 04 18:47:55 node-horsea sshd[901]: Server listening on :: port 22.
Aug 04 18:47:55 node-horsea systemd[1]: Started OpenBSD Secure Shell server.
Aug 04 18:50:25 node-horsea sshd[1167]: Accepted publickey for ubuntu from 10.172.68.194 port 42610 ssh2: RSA SHA256:7JLFXGJ/lkuhcSu8/OF8mHjZ8wMD1zEfNSuNGM5u2Lk
Aug 04 18:50:25 node-horsea sshd[1167]: pam_unix(sshd:session): session opened for user ubuntu(uid=1000) by (uid=0)
ubuntu@node-horsea:~$ sudo systemctl daemon-reexec
ubuntu@node-horsea:~$ sudo systemctl status ssh
● ssh.service - OpenBSD Secure Shell server
     Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
     Active: active (running) since Fri 2023-08-04 18:47:55 UTC; 2min 41s ago
       Docs: man:sshd(8)
             man:sshd_config(5)
   Main PID: 901 (sshd)
      Tasks: 1 (limit: 38215)
     Memory: 7.6M
        CPU: 84ms
     CGroup: /system.slice/ssh.service
             └─901 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups"

Aug 04 18:47:55 node-horsea systemd[1]: Starting OpenBSD Secure Shell server...
Aug 04 18:47:55 node-horsea sshd[901]: Server listening on 0.0.0.0 port 22.
Aug 04 18:47:55 node-horsea sshd[901]: Server listening on :: port 22.
Aug 04 18:47:55 node-horsea systemd[1]: Started OpenBSD Secure Shell server.
Aug 04 18:50:25 node-horsea sshd[1167]: Accepted publickey for ubuntu from 10.172.68.194 port 42610 ssh2: RSA SHA256:7JLFXGJ/lkuhcSu8/OF8mHjZ8wMD1zEfNSuNGM5u2Lk
Aug 04 18:50:25 node-horsea sshd[1167]: pam_unix(sshd:session): session opened for user ubuntu(uid=1000) by (uid=0)

I will mark bug #2004551 as a duplicate of this one. I can also help with the SRU verification, Nick. Just let me know.

Thanks.