bin/56387: Wrong uptime output: returns all but the uptime

[rdanilov75%gmail.com@localhost]

>Number:         56387
>Category:       bin
>Synopsis:       Wrong uptime output: returns all but the uptime
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Sep 03 17:35:00 +0000 2021
>Originator:     Roman Danilov
>Release:        9.2
>Organization:
>Environment:
NetBSD inw-vm039.i-hn.loc 9.2 NetBSD 9.2 (GENERIC) #0: Wed May 12 13:15:55 UTC 2021  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64

>Description:
If run uptime command, I get all, but the uptime:

inw-vm039$ uptime
 8:08PM  1 user, load averages: 0.00, 0.00, 0.00

On my regular user:

inw-vm039$ echo $SHELL
/bin/ksh
inw-vm039$ which uptime
/usr/bin/uptime
inw-vm039$

On my superuser:

inw-vm039$ su -
Password:
inw-vm039# echo $SHELL
/bin/sh
inw-vm039# which uptime
/usr/bin/uptime

In both environments, bug is reproducing.

In the /proc filesystem, uptime is readable on both of users:

inw-vm039# cat /proc/uptime
1065.82 1041.66
inw-vm039# exit
inw-vm039$ cat /proc/uptime
1095.38 1073.78

>How-To-Repeat:
1.Login to your shell
2. Run 'uptime' command
>Fix: