bin/143786: su fails to login and prints 'load: ...' on return

[Tigger]

>Number:         143786
>Category:       bin
>Synopsis:       su fails to login and prints 'load: ...' on return
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Feb 11 03:10:01 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Tigger
>Release:        FreeBSD 7.2
>Organization:
>Environment:
FreeBSD edward.lilypie.com 7.2-RELEASE-p5 FreeBSD 7.2-RELEASE-p5 #8: Thu Dec 17 13:13:33 EST 2009     tigger at edward.lilypie.com:/var/obj/var/src/sys/EDWARD  i386
>Description:
This is only the second time I have seen this happen. I think I rebooted the machine last time it happened.

ssh to remote machine, then su (to root) produced the following:

tigger at edward:~% su
Password:load: 1.19  cmd: su 58298 [ttyin] 0.00u 0.00s 0% 1308k
load: 1.19  cmd: su 58298 [ttyin] 0.00u 0.00s 0% 1308k
load: 1.19  cmd: su 58298 [ttyin] 0.00u 0.00s 0% 1308k
(each 'load:...' is a return press)

>From another terminal, `kill -9 58298' will kill the su call and display the password on the terminal where su was typed.

Interestingly, `su tigger' works fine (at a guess, because no password is entered). su to any other user also produces the issue.

The issue appears to have been around for a while:
http://unix.derkeiler.com/Mailing-Lists/FreeBSD/questions/2004-07/0148.html

and this one is similar, but different:
http://lists.freebsd.org/pipermail/freebsd-current/2009-June/007603.html


>How-To-Repeat:
Don't know, sorry!!
>Fix:
No idea.

>Release-Note:
>Audit-Trail:
>Unformatted: