$ journalctl |grep 'Failed to save link data'
Apr 17 15:25:52 hostname systemd-resolved[19095]: Failed to save link data /run/systemd/resolve/netif/3: Permission denied
Apr 17 15:25:52 hostname systemd-resolved[19095]: Failed to save link data /run/systemd/resolve/netif/3: Permission denied
I see this on 22.04 after upgrading from 20.04.
$ journalctl |grep 'Failed to save link data' resolved[ 19095]: Failed to save link data /run/systemd/ resolve/ netif/3: Permission denied resolved[ 19095]: Failed to save link data /run/systemd/ resolve/ netif/3: Permission denied
Apr 17 15:25:52 hostname systemd-
Apr 17 15:25:52 hostname systemd-
$ ls -ld /run/systemd/ resolve/ netif resolve/ netif
drwxr-xr-x 2 root root 40 Apr 17 14:46 /run/systemd/
(note, I had tried to restart systemd-resolved)