What were you trying to do that didn't work?

use skill to kill a process

Please provide the package NVR for which bug is seen:

procps-ng-3.3.15-14.el8.x86_64

How reproducible:

Everytime

Steps to reproduce

1. [root@r8 ~]# sleep 1000 &
   [1] 44464
   
   [root@r8 ~]# skill -KILL -p 44464
   
   [root@r8 ~]# ps aux | grep sleep
   root       44416  0.0  0.0   7392   836 ?        S    14:33   0:00 sleep 1000
   root       44464  0.0  0.0   7392   932 pts/1    S    14:37   0:00 sleep 1000
   root       44467  0.0  0.0  12220  1100 pts/1    S+   14:37   0:00 grep --color=auto sleep 

Expected results

-u <user> should kill all user process

-p <pid> should kill that pid

Actual results

Nothing. Strace shows a SIGKILL is not even sent.