Bug 803585

Summary: agentx counter64 snmpget problem
Product: Red Hat Enterprise Linux 5 Reporter: Yury Stankevich <urykhy>
Component: net-snmpAssignee: Jan Safranek <jsafrane>
Status: CLOSED ERRATA QA Contact: Dalibor Pospíšil <dapospis>
Severity: medium Docs Contact:
Priority: medium    
Version: 5.8   
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: net-snmp-5.3.2.2-18.el5 Doc Type: Bug Fix
Doc Text:
Previously, snmpd used wrong length of COUNTER64 values in AgentX protocol and therefore was not able to decode two consecutive COUNTER64 values in one AgentX packet. In this update, snmpd uses correct COUNTER64 size and can process two or mode COUNTER64 values in AgentX communication.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2013-01-08 05:02:54 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
subagent for reproducer none

Description Yury Stankevich 2012-03-15 07:03:07 UTC 
Description of problem:
Impossible to get counter64 value from agentx subagent with multi-oid snmpget.


Version-Release number of selected component (if applicable):
5.3.2.2-17 - affected - 5.8
5.3.2.2-14 - affected - 5.7

How reproducible:
create agentx application, register few counter64 counters with it.
make query like a snmpget counter1 counter2
(2 counters within one query)

Actual results:
snmpd drops agentx subagent, no response to user.

Expected results:
actual counters values.

Additional info:
fix from [1] works for me.

[1] http://www.mail-archive.com/net-snmp-users@lists.sourceforge.net/msg19301.html
Comment 1 Jan Safranek 2012-04-26 10:56:48 UTC 
Created attachment 580431 [details]
subagent for reproducer

Steps to reproduce:
1. compile attached subagent
    net-snmp-config --compile-subagent subagent subagent.c
2. enable agentx
    echo "master agentx" >> /etc/snmp/snmpd.conf
3. start everything
    service snmpd restart
    ./subagent -f -Lo
4. check the subagent works
    snmpwalk localhost 1.3.6.1.4.1.2021.1.1
5. reproduce the bug
    snmpget localhost UCD-SNMP-MIB::ucdavis.1.1.1.0 UCD-SNMP-MIB::ucdavis.1.1.3.0 UCD-SNMP-MIB::ucdavis.1.1.4.0

-> you should *not* get "Error in packet" or timeout but two 64bit numbers
Comment 2 RHEL Program Management 2012-04-26 11:07:15 UTC 
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux release.  Product Management has
requested further review of this request by Red Hat Engineering, for
potential inclusion in a Red Hat Enterprise Linux release for currently
deployed products.  This request is not yet committed for inclusion in
a release.
Comment 4 Jan Safranek 2012-06-11 14:51:34 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Previously, snmpd used wrong length of COUNTER64 values in AgentX protocol and therefore was not able to decode two consecutive COUNTER64 values in one AgentX packet. In this update, snmpd uses correct COUNTER64 size and can process two or mode COUNTER64 values in AgentX communication.
Comment 8 errata-xmlrpc 2013-01-08 05:02:54 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2013-0124.html