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Bug 789220

Summary: memory leak on client programming failure path
Product: Red Hat Enterprise Linux 6 Reporter: Alex Jia <ajia>
Component: libvirtAssignee: Alex Jia <ajia>
Status: CLOSED ERRATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: high Docs Contact:
Priority: high    
Version: 6.3CC: acathrow, dyuan, mshao, mzhan, rwu, veillard
Target Milestone: rc   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: libvirt-0.9.10-1.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-06-20 06:48:10 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 2012-02-10 05:54:40 UTC
Description of problem:
Memory leak on client programming failure path.

Version-Release number of selected component (if applicable):
# rpm -q libvirt
libvirt-0.9.10-0rc2.el6.x86_64

How reproducible:
always

Steps to Reproduce:
# valgrind -v --leak-check=full virsh -c qemu:

Note, give a incomplete qemu/xen URI etc.
  
Actual results:

==7373== 40 bytes in 1 blocks are definitely lost in loss record 7 of 26
==7373==    at 0x4A04A28: calloc (vg_replace_malloc.c:467)
==7373==    by 0x4C72C9D: virAlloc (memory.c:101)
==7373==    by 0x4D2FAE8: virNetClientProgramNew (virnetclientprogram.c:60)
==7373==    by 0x4D1F034: doRemoteOpen (remote_driver.c:658)
==7373==    by 0x4D213EF: remoteOpen (remote_driver.c:871)
==7373==    by 0x4CEDCA0: do_open (libvirt.c:1196)
==7373==    by 0x4CEEDC5: virConnectOpenAuth (libvirt.c:1422)
==7373==    by 0x423447: main (virsh.c:18526)
==7373== 
==7373== 40 bytes in 1 blocks are definitely lost in loss record 8 of 26
==7373==    at 0x4A04A28: calloc (vg_replace_malloc.c:467)
==7373==    by 0x4C72C9D: virAlloc (memory.c:101)
==7373==    by 0x4D2FAE8: virNetClientProgramNew (virnetclientprogram.c:60)
==7373==    by 0x4D1F057: doRemoteOpen (remote_driver.c:664)
==7373==    by 0x4D213EF: remoteOpen (remote_driver.c:871)
==7373==    by 0x4CEDCA0: do_open (libvirt.c:1196)
==7373==    by 0x4CEEDC5: virConnectOpenAuth (libvirt.c:1422)
==7373==    by 0x423447: main (virsh.c:18526)
==7373== 
==7373== LEAK SUMMARY:
==7373==    definitely lost: 80 bytes in 2 blocks

Expected results:
fix client memory leaks on failure path.

Additional info:

Comment 1 Alex Jia 2012-02-10 05:55:43 UTC
The patch has been sent to upstream and wait for review:
https://www.redhat.com/archives/libvir-list/2012-February/msg00519.html

Comment 2 Alex Jia 2012-02-10 07:24:04 UTC
The path has been ACKed and pushed:

commit 6d514728cc88a0df4c2d334c771fdd9122f46b15
Author: Alex Jia <ajia>
Date:   Fri Feb 10 13:26:29 2012 +0800

    rpc: Plug memory leaks on doRemoteOpen() failure path
    
    Detected by valgrind. Leaks are introduced in commit c1b2264.
    
    * src/remote/remote_driver.c (doRemoteOpen): free client program memory in failure path.
    
    * How to reproduce?
    % valgrind -v --leak-check=full virsh -c qemu:

Comment 4 xhu 2012-02-15 06:38:05 UTC
Reproduce it with libvirt-0.9.10-0rc2.el6.x86_64.
Verify it with libvirt-0.9.10-1.el6 and it passed.

Comment 6 errata-xmlrpc 2012-06-20 06:48:10 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