Bug 722806

Summary:	virsh net-info command exists memory leak
Product:	Red Hat Enterprise Linux 6	Reporter:	Alex Jia <ajia>
Component:	libvirt	Assignee:	Laine Stump <laine>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	high
Version:	6.2	CC:	dallan, dyuan, jyang, rwu, veillard
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	libvirt-0.9.4-1.el6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-12-06 11:16:51 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Alex Jia 2011-07-18 02:53:38 UTC

Description of problem:
Memory leak on cmdNetworkInfo function, allocate memory to 'bridge'(char *bridge = NULL), but without free it.


Version-Release number of selected component (if applicable):
# uname -r
2.6.32-160.el6.x86_64

# rpm -q libvirt
libvirt-0.9.3-5.el6.x86_64

# rpm -q qemu-kvm
qemu-kvm-0.12.1.2-2.169.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1. valgrind -v --leak-check=full virsh net-info default
2. check 'LEAK SUMMARY'
  
Actual results:
--15089-- REDIR: 0x386a282440 (__GI_memset) redirected to 0x4a08e30 (memset)
Name            default
UUID            f19f2e66-9401-4e6f-b105-5a00b5490d62
Active:         yes
Persistent:     yes
Autostart:      yes
Bridge:         virbr0

==15089== 
==15089== HEAP SUMMARY:
==15089==     in use at exit: 68,480 bytes in 47 blocks
==15089==   total heap usage: 1,071 allocs, 1,024 frees, 2,887,246 bytes allocated
==15089== 
==15089== Searching for pointers to 47 not-freed blocks
==15089== Checked 1,230,840 bytes
==15089== 
==15089== 7 bytes in 1 blocks are definitely lost in loss record 1 of 15
==15089==    at 0x4A05FDE: malloc (vg_replace_malloc.c:236)
==15089==    by 0x386A314B3D: xdr_string (in /lib64/libc-2.12.so)
==15089==    by 0x4CFC5AD: xdr_remote_nonnull_string (remote_protocol.c:30)
==15089==    by 0x4CFD108: xdr_remote_network_get_bridge_name_ret (remote_protocol.c:1999)
==15089==    by 0x4D062D1: virNetMessageDecodePayload (virnetmessage.c:286)
==15089==    by 0x4D03735: virNetClientProgramCall (virnetclientprogram.c:318)
==15089==    by 0x4CE7752: call (remote_driver.c:3927)
==15089==    by 0x4CEDDD2: remoteNetworkGetBridgeName (remote_client_bodies.h:3384)
==15089==    by 0x4CC4E3E: virNetworkGetBridgeName (libvirt.c:8503)
==15089==    by 0x40F614: cmdNetworkInfo (virsh.c:5019)
==15089==    by 0x410CC2: vshCommandRun (virsh.c:12758)
==15089==    by 0x41F286: main (virsh.c:14110)
==15089== 
==15089== LEAK SUMMARY:
==15089==    definitely lost: 7 bytes in 1 blocks



Expected results:
Avoid memory leak.

Additional info:
Has fix this issue:
https://www.redhat.com/archives/libvir-list/2011-July/msg00917.html
https://www.redhat.com/archives/libvir-list/2011-July/msg00921.html

Comment 1 Alex Jia 2011-08-02 08:21:42 UTC

https://www.redhat.com/archives/libvir-list/2011-August/msg00067.html

Comment 2 Osier Yang 2011-08-02 08:52:02 UTC

commit 22da8c941cc806a40cee69955ecb105f9b8e5a40
Author: Alex Jia <ajia>
Date:   Tue Aug 2 16:31:36 2011 +0800

    virsh: fix memory leak in cmdNetworkInfo
    
    * tools/virsh.c: avoid memory leak in cmdNetworkInfo.
    
    * how to reproduce?
      % valgrind -v --leak-check=yes virsh net-info default
    
      https://bugzilla.redhat.com/show_bug.cgi?id=722806

Move to POST.

Comment 5 dyuan 2011-08-04 06:54:02 UTC

Reproduced this bug with libvirt-0.9.4-0rc2.el6.

Verified PASS with libvirt-0.9.4-1.el6
pkgs:
qemu-kvm-0.12.1.2-2.176.el6
kernel-2.6.32-176.el6

==12064== 
==12064== HEAP SUMMARY:
==12064==     in use at exit: 331,377 bytes in 53 blocks
==12064==   total heap usage: 1,113 allocs, 1,060 frees, 2,892,195 bytes allocated
==12064== 
==12064== Searching for pointers to 53 not-freed blocks
==12064== Checked 1,519,304 bytes
==12064== 
==12064== LEAK SUMMARY:
==12064==    definitely lost: 0 bytes in 0 blocks
==12064==    indirectly lost: 0 bytes in 0 blocks
==12064==      possibly lost: 0 bytes in 0 blocks
==12064==    still reachable: 331,377 bytes in 53 blocks
==12064==         suppressed: 0 bytes in 0 blocks
==12064== Reachable blocks (those to which a pointer was found) are not shown.
==12064== To see them, rerun with: --leak-check=full --show-reachable=yes
==12064== 
==12064== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 8 from 6)
--12064-- 
--12064-- used_suppression:      8 dl-hack3-cond-1
==12064== 
==12064== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 8 from 6)

Comment 6 errata-xmlrpc 2011-12-06 11:16:51 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/RHBA-2011-1513.html