snmptrapd seg faulting after forwarding v3 traps

All,
 
I've been having a 
problem with snmptrapd crashing after successfully logging and forwarding v3 
traps.  I have no problems with version 2 or 1.  If I turn forwarding off, 
snmptrapd does not crash with v3 traps.  My initial tests were run on net-snmp 
version 5.3.0.1.   I found online a mention of the fact that there were SNMP v3 
problems  in 5.3.0.1 so I tried using net-snmp version 5.4.2.1 and still 
encountered the same problem.  Then I put a return at the beginning of 
usm_free_usmStateReference, recompiled everything and I no longer see a 
segfault.
 
 
Below is an excerpt 
from the command I issued, the backtrace and my snmptrapd.conf file.  I could 
not find this issue resolved in the bugtracker although I did find a similar 
issue that is still open:
 
http://sourceforge.net/tracker/index.php?func=detail&aid=1644670&group_id=12694&atid=112694  
 
Any help would be 
greatly appreciated.
 
Thanks,
Felix
 
 
 snmptrap -d -e 
0x0102030405 -v 3  -M /usr/share/snmp/mibs -m ALL -l noauthnoPriv -u traptest 
192.168.0.141  "" .1.3.6.1.3.94.0.4  connUnitEventId i 1



Core was generated by `/usr/sbin/snmptrapd -f -M 
/usr/share/snmp/mibs -m ALL -c /etc/snmptrapd.conf -L'.
Program terminated 
with signal 11, Segmentation fault.
#0  0x47bf3f17 in free () from 
/lib/libc.so.6
(gdb) bt
#0  0x47bf3f17 in free () from 
/lib/libc.so.6
#1  0x47f3a127 in usm_free_usmStateReference () from 
/usr/lib/libnetsnmp.so.10
#2  0x00000007 in ?? ()
#3  0x081b8650 in ?? 
()
#4  0x47cc809b in snmp_input () from /usr/lib/libnetsnmptrapd.so.10
#5  
0x47f17b09 in ?? () from /usr/lib/libnetsnmp.so.10
#6  0x0816c470 in ?? 
()
#7  0x081b8650 in ?? ()
#8  0x542abe62 in ?? ()
#9  0x08178f38 in ?? 
()
#10 0x081b6280 in ?? ()
#11 0xff8b6518 in ?? ()
#12 0x08178f38 in ?? 
()
#13 0xff8b6528 in ?? ()
#14 0x47bf5a69 in malloc () from 
/lib/libc.so.6

###########################################################################
#
# 
snmptrapd.conf
#
#   - created by the snmpconf configuration 
program
#
###########################################################################
# 
SECTION: Output formatting for traps received.
#
#   Output from snmptrapd 
is formatted according to the
#   rules defined by the formatting 
configuration directives.
 

# format1: How SNMPv1 traps are 
formatted.
#   See the snmptrapd.conf manual page for format string 
details.
#   arguments: formatstring
 
# format2: How SNMPv2 and SNMPv3 traps are 
formatted.
#   See the snmptrapd.conf manual page for format string 
details.
#   arguments: formatstring
 
authCommunity log,execute,net 
public
disableAuthorization yes
 
#createUser informtest MD5 mypassword DES 
mypassword
#authUser log,net informtest 
 
createUser -e 0x0102030405 traptest MD5 mypassword 
DES myotherpassword
authUser log,execute,net traptest
 
format1 %V\n% Agent Address: %A \n PDU Source 
Hostname: %B \n Date: %#02.2h:%#
02.2j:%#02.2k %#02.2m/%#02.2l/%#y \n 
Enterprise OID: %N \n Trap Type: %W \n Tr
ap Sub-Type: %q \n 
Community/Infosec Context: %P \n Uptime: %#T \n Description
: %W \n PDU 
Attribute/Value Pair Array:\n%v \n -------------- \n
 
format2 %V\n% PDU Source Hostname: %B \n Date: 
%#02.2h:%#02.2j:%#02.2k %#02.2m
/%#02.2l/%#y \n Community/Infosec Context: %P 
\n PDU Attribute/Value Pair Arra
y:\n%v \n -------------- \n
 
snmpTrapdAddr 192.168.0.141:162
forward 
default  a.b.c.d   (I've commented out the actual 
address I'm forwarding to)



      


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