Bug 736258
| Summary: | Use "ctrl+c" to close libvirtMib_subagent will lead to memory leak | ||||||
|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | xhu | ||||
| Component: | libvirt-snmp | Assignee: | Martin Kletzander <mkletzan> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | high | ||||||
| Version: | 6.2 | CC: | ajia, areis, bili, cwei, dallan, dyuan, jmiao, lnovich, mprivozn, mshao, mzhan | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | libvirt-snmp-0.0.2-4.el6 | Doc Type: | Bug Fix | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2013-11-21 21:40:22 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: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 896690, 960054 | ||||||
| Attachments: |
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I confirm the bug, it's easy to reproduce but I haven't seen the libvirt daemon affected in any way. Two fixes have been needed to do this, one was fixed earlier in the library, the second one was pushed into the snmp code now:
commit 22c2f5fd91a63d817199b42e695a87dab28ad0c1
Author: Martin Kletzander <mkletzan>
Date: Wed May 30 14:30:02 2012 +0200
Stop event thread on server stop
This request was evaluated by Red Hat Product Management for inclusion in the current release of Red Hat Enterprise Linux. Because the affected component is not scheduled to be updated in the current release, Red Hat is unable to address this request at this time. Red Hat invites you to ask your support representative to propose this request, if appropriate, in the next release of Red Hat Enterprise Linux. (In reply to Laura Novich from comment #12) > While this bug fix probably only needs to be included in the RN, I am > marking this as docs_scoped ? just to make sure it doesn't need to be > considered for the Virt. Admin. Guide > Ademar? Documentation isn't necessary. # cat /etc/snmp/snmpd.conf rwcommunity public master agentx trapcommunity public trap2sink localhost # cat /etc/sysconfig/snmptrapd OPTIONS="-m ALL -p /var/run/snmptrapd.pid" # service snmpd restart Stopping snmpd: [FAILED] Starting snmpd: [ OK ] # service snmptrapd restart Stopping snmptrapd: [FAILED] Starting snmptrapd: [ OK ] # LIBVIRT_DEFAULT_URI="qemu:///system" valgrind --leak-check=full libvirtMib_subagent -f -L >& tmp.log 2>&1 # cat tmp.log ==18947== Memcheck, a memory error detector ==18947== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al. ==18947== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info ==18947== Command: libvirtMib_subagent -f -L ==18947== NET-SNMP version 5.5 AgentX subagent connected ==18947== ==18947== HEAP SUMMARY: ==18947== in use at exit: 143,700 bytes in 1,575 blocks ==18947== total heap usage: 32,788 allocs, 31,213 frees, 27,425,111 bytes allocated ==18947== ==18947== LEAK SUMMARY: ==18947== definitely lost: 0 bytes in 0 blocks ==18947== indirectly lost: 0 bytes in 0 blocks ==18947== possibly lost: 0 bytes in 0 blocks ==18947== still reachable: 143,700 bytes in 1,575 blocks ==18947== suppressed: 0 bytes in 0 blocks ==18947== Reachable blocks (those to which a pointer was found) are not shown. ==18947== To see them, rerun with: --leak-check=full --show-reachable=yes ==18947== ==18947== For counts of detected and suppressed errors, rerun with: -v ==18947== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 18 from 6) No memory leak in valgrind report, so I change the status to VERIFIED. 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/RHBA-2013-1666.html |
Created attachment 521807 [details] memory leak info Description of problem: Use "ctrl+c" to close libvirtMib_subagent will lead to memory leak Version-Release number of selected component (if applicable): libvirt-snmp-0.0.2-1.el6.x86_64 libvirt-snmp-debuginfo-0.0.2-1.el6.x86_64 libvirt-0.9.4-7.el6.x86_64 qemu-kvm-0.12.1.2-2.185.el6.x86_64 How reproducible: everytimes Steps to Reproduce: 1. install libvirt-snmp libvirt-snmp-debuginfo valgrind # sudo yum install libvirt-snmp libvirt-snmp-debuginfo valgrind 2. prepare /etc/snmp/snmpd.conf as follows: # cat /etc/snmp/snmpd.conf rwcommunity public master agentx trapcommunity public trap2sink localhost 3. append the following lines to /etc/snmp/snmptrapd.conf # Example configuration file for snmptrapd authCommunity log,execute,net public logOption f /var/log/snmptraps.log 4. add the following lines to /etc/sysconfig/snmptrapd: OPTIONS="-m ALL -p /var/run/snmptrapd.pid" 5. restart snmpd and snmptrapd service # service snmpd restart # service snmptrapd restart 6. run libvirt snmp agent daemon LIBVIRT_DEFAULT_URI="qemu:///system" valgrind --leak-check=full libvirtMib_subagent -f -L >& tmp.log 2>&1 7. use "ctrl+c" twice to close libvirtMib_subagent Actual results: There is memory leak and the details can be seen in the "tmp.log" attachment. Expected results: There is no memory leak Additional info: Sometimes the libvirtd will die