security/rkhunter and sysutils/lsof using 100% CPU but not producing output

[Glen Barber]

Hi, folks.

I'm running:
FreeBSD orion 8.0-CURRENT FreeBSD 8.0-CURRENT #6 r195343: Sat Jul  4
12:23:04 EDT 2009     root at orion:/usr/obj/usr/src/sys/ORION  i386

Once security/rkhunter reaches the 'Performing malware checks', there
appears to be no I/O -- this check used to take less than 2 minutes on
7-STABLE (and previous).  I was running the check as I was writing
this email -- here's what top(1) shows:

last pid: 52370;  load averages:  0.98,  0.77,  0.48    up 0+02:54:16  16:13:35
74 processes:  2 running, 72 sleeping
CPU:  8.3% user,  0.0% nice, 45.8% system,  0.0% interrupt, 45.8% idle
Mem: 224M Active, 203M Inact, 124M Wired, 1484K Cache, 112M Buf, 1432M Free
Swap: 4027M Total, 4027M Free

  PID USERNAME    THR PRI NICE   SIZE    RES STATE   C   TIME   WCPU COMMAND
52298 root          1 116    0  3348K  1732K RUN     1   2:12 92.09% lsof

Any thoughts on how I should proceed troubleshooting this?

The basics are covered, of course, such as an up-to-date tree, and
fresh rebuilds on the port(s) in question.

Thanks for any tips.

-- 
Glen Barber