[ net-snmp-Bugs-3496247 ] Possibly a memory leak in disman-ping realization

[SourceForge.net <no...@so...>]

Bugs item #3496247, was opened at 2012-03-02 02:46
Message generated for change (Comment added) made by 
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112694&aid=3496247&group_id=12694

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: agent
Group: linux
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: abc (idainet)
Assigned to: Nobody/Anonymous (nobody)
Summary: Possibly a memory leak in disman-ping realization

Initial Comment:
Version 5.7.1 for Linux possibly have a memory leak (or defined behavior?). Situation described below tends snmpd to tireless memory eating without freeing, until it's killed manually, or by the kernel

How to reproduce: 4.3.2 4.2.4
1. Compile Net-SNMP 5.7.1 for Linux with disman-ping support (we used gcc 4.2.4, 4.3.2, 4.6.1 - all the same result)
2. Start snmpd and create a probe using script like snmpping (in attach). Originally we were using Frequency = 180 s, and ProbeCount = 3, but this just extends reproducing time
3. Now you can watch how memory consumption changes, using this script 
while :; do ps aux | grep snmpd | egrep -v 'trap|grep' | awk '{print $5}'; sleep 60; done

Also in attach 3 ping*.c files with code coverage after running snmpd a while. It looks like pingProbeHistoryTable_delLast works fine, but 3 ping*_cleaner are commented (what role they play?) 

Please, tell us If you need more precise information, or have problems in reproducing 

Thanks is advance. 

----------------------------------------------------------------------

Comment By: https://www.google.com/accounts ()
Date: 2012-03-15 03:02

Message:
Patch from previous post is updated (now it is better!)

----------------------------------------------------------------------

Comment By: https://www.google.com/accounts ()
Date: 2012-03-13 01:15

Message:
This patch solves most of memory leaks 
https://sourceforge.net/tracker/?func=detail&aid=3503259&group_id=12694&atid=312694

----------------------------------------------------------------------

Comment By: https://www.google.com/accounts ()
Date: 2012-03-05 01:59

Message:
Valgrind output - https://gist.github.com/5bf24821307bd66a153f

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=112694&aid=3496247&group_id=12694