Comment 6 for bug 1952353

I can confirm dmesg on Ubuntu 21.10 gives me "Operation not permitted", even though my user is in the "adm" group:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 21.10
Release: 21.10
Codename: impish

$ ls -l /var/log/dmesg*
-rw-r----- 1 root adm 100336 Mar 13 17:01 /var/log/dmesg
-rw-r----- 1 root adm 94365 Mar 13 16:40 /var/log/dmesg.0
-rw-r----- 1 root adm 23990 Mar 13 15:00 /var/log/dmesg.1.gz
-rw-r----- 1 root adm 23017 Mar 9 21:50 /var/log/dmesg.2.gz
-rw-r----- 1 root adm 23295 Mar 4 18:51 /var/log/dmesg.3.gz
-rw-r----- 1 root adm 23253 Feb 24 21:34 /var/log/dmesg.4.gz

$ id
uid=1000(marji) gid=1000(marji) groups=1000(marji),4(adm),5(tty),10(uucp),20(dialout),24(cdrom),27(sudo),30(dip),46(plugdev),121(lpadmin),132(lxd),133(sambashare),134(docker)

$ dmesg
dmesg: read kernel buffer failed: Operation not permitted