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Subject: strace hard lock 
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Topic:          strace casues hardlock. no kernel panic.  userland tool

Category:       kernel
Program:        strace
Affects:        FreeBSD releases 5.x and later.

problem:  When a normal user (or root user) users strace on certain 
binarys, the system will hardlock up, with no kernel panic. (numlock 
doesnt turn on and off, no ssh or console access). Im using strace from 
the ports collection. The crash seemed to occure when exiting strace 
from a running program, Also the crash would not happen 100% of the time 
leaving a program, but it never took more than 3 times to casue the crash.

Repeatable: i repeated this bug on 2 different systems both were SMP. 2 
procs. I have not been able to test on a UP system yet.

The main program i am running, also the easyest to casue the crash can 
be found at the following links:
http://www.pvpgn.de/files.aspx?file=pvpgn-1.6.0beta.tar.bz2
http://www.pvpgn.de/files.aspx?file=pvpgn-1.6.0beta.tar.gz