Bug 761345

Summary:	memory leak on cmdDomIfGetLink sucessful path
Product:	Red Hat Enterprise Linux 6	Reporter:	Alex Jia <ajia>
Component:	libvirt	Assignee:	Alex Jia <ajia>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	high
Version:	6.3	CC:	acathrow, dyuan, mshao, mzhan, rwu, veillard, zhpeng
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	libvirt-0.9.9-1.el6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-20 06:38:13 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:

Description Alex Jia 2011-12-08 06:09:16 UTC

Description of problem:
Plug memory leak on cmdDomIfGetLink() sucessful path.

Version-Release number of selected component (if applicable):
libvirt-0.9.8-0rc2.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1. valgrind -v --leak-check=full virsh domif-getlink <domain name> <invalid mac>

Note: for instance, give a invalid mac address '0' and guest name 'demo', then
run 'valgrind -v --leak-check=full virsh domif-getlink demo 0'.
  
Actual results:

==13102== 18 bytes in 1 blocks are definitely lost in loss record 9 of 47
==13102==    at 0x4A05FDE: malloc (vg_replace_malloc.c:236)
==13102==    by 0x322A6A67DD: xmlStrndup (in /usr/lib64/libxml2.so.2.7.6)
==13102==    by 0x414892: cmdDomIfGetLink (virsh.c:1538)
==13102==    by 0x4136A2: vshCommandRun (virsh.c:16363)
==13102==    by 0x4253FB: main (virsh.c:17865)
==13102==
==13102== LEAK SUMMARY:
==13102==    definitely lost: 18 bytes in 1 blocks
==13102==    indirectly lost: 0 bytes in 0 blocks
==13102==      possibly lost: 0 bytes in 0 blocks
==13102==    still reachable: 127,888 bytes in 1,361 blocks
==13102==         suppressed: 0 bytes in 0 blocks


Expected results:
avoid memory leak.

Additional info:

Comment 1 Alex Jia 2011-12-08 06:12:51 UTC

Patch for upstream:

https://www.redhat.com/archives/libvir-list/2011-December/msg00375.html

Comment 2 Alex Jia 2011-12-09 02:27:18 UTC

Patch has been ACKed and pushed on upstream, but need a devel_ack+.

commit f582199e60cb090c1267aa310d361a22ab8e6484
Author: Alex Jia <ajia>
Date:   Thu Dec 8 14:09:57 2011 +0800

    virsh: plug memory leak on cmdDomIfGetLink() sucessful path
    
    Detected by valgrind. Leak introduced in commit dc675f3:
    
    * tools/virsh.c: fix memory leak on cmdDomIfGetLink.
    
    * how to reproduce?
      % valgrind -v --leak-check=full virsh domif-getlink <domain name> 0
    
    * actual valgrind result:
    
    ==13102== 18 bytes in 1 blocks are definitely lost in loss record 9 of 47
    ==13102==    at 0x4A05FDE: malloc (vg_replace_malloc.c:236)
    ==13102==    by 0x322A6A67DD: xmlStrndup (in /usr/lib64/libxml2.so.2.7.6)
    ==13102==    by 0x414892: cmdDomIfGetLink (virsh.c:1538)
    ==13102==    by 0x4136A2: vshCommandRun (virsh.c:16363)
    ==13102==    by 0x4253FB: main (virsh.c:17865)
    ==13102==
    ==13102== LEAK SUMMARY:
    ==13102==    definitely lost: 18 bytes in 1 blocks
    ==13102==    indirectly lost: 0 bytes in 0 blocks
    ==13102==      possibly lost: 0 bytes in 0 blocks
    ==13102==    still reachable: 127,888 bytes in 1,361 blocks
    ==13102==         suppressed: 0 bytes in 0 blocks

Comment 3 zhpeng 2011-12-13 09:58:28 UTC

I can reproduce this with libvirt-0.9.8-1.el6.x86_64

Comment 5 xhu 2012-01-10 08:17:56 UTC

Reproduce it with libvirt-0.9.8-0rc2.el6.x86_64.
Verify it with libvirt-0.9.9-1.el6 and it passed.

Comment 7 errata-xmlrpc 2012-06-20 06:38:13 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-2012-0748.html