Comment 1 for bug 2039354

Description of problem:
A user with login-shell set to /sbin/nologin is still able to login using GDM

Version-Release number of selected component (if applicable):
gdm-3.28.3-20.el8.x86_64

How reproducible:
100%

Steps to Reproduce:
1. RHEL 8
2. useradd -s /sbin/nologin -m user2
3. login via GDM

Actual results:
The user is able to login

Expected results:
The user should not be able to login

Additional info:
# grep user2 /etc/passwd
user2:x:1001:1001::/home/user2:/sbin/nologin

# w
 17:39:27 up 30 min, 2 users, load average: 0,80, 0,17, 0,07
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/0 172.16.100.100 17:09 1.00s 0.11s 0.01s w
user2 :1 :1 17:39 ?xdm? 16.42s 0.02s /usr/libexec/gdm-x-session gnome-session

# su - user2
Last login: Fr Aug 23 17:39:24 UTC 2019 on tty2
This account is currently not available.