Bug 1943415

Summary:	virsh: memory leak at invalid setmem subcommand
Product:	Red Hat Enterprise Linux Advanced Virtualization	Reporter:	Han Han <hhan>
Component:	libvirt	Assignee:	Ján Tomko <jtomko>
Status:	CLOSED ERRATA	QA Contact:	Jing Qi <jinqi>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	8.4	CC:	jdenemar, jsuchane, lmen, virt-maint, xuzhang
Target Milestone:	rc	Keywords:	Triaged
Target Release:	8.5	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	libvirt-7.3.0-1.el8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-16 07:52:31 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:	7.3.0
Embargoed:

Description Han Han 2021-03-26 02:45:13 UTC

Description of problem:
As subject

Version-Release number of selected component (if applicable):
libvirt-7.0.0-10.module+el8.4.0+10417+37f6984d.x86_64

How reproducible:
100%

Steps to Reproduce:
# valgrind --leak-check=full virsh setmem 100

Actual results:
==236992== 28 (24 direct, 4 indirect) bytes in 1 blocks are definitely lost in loss record 98 of 272
==236992==    at 0x4C3721A: calloc (vg_replace_malloc.c:760)
==236992==    by 0x5C6E2FD: g_malloc0 (gmem.c:129)
==236992==    by 0x17F40D: vshCommandParse (vsh.c:1471)
==236992==    by 0x17FF61: vshCommandArgvParse (vsh.c:1597)
==236992==    by 0x13AC63: virshParseArgv (virsh.c:782)
==236992==    by 0x13AC63: main (virsh.c:886)


Expected results:
No direct or indirect bytes of definitely lost

Additional info:

Comment 1 Ján Tomko 2021-04-07 15:30:39 UTC

Proposed upstream patch:
https://listman.redhat.com/archives/libvir-list/2021-April/msg00167.html

Comment 2 Jing Qi 2021-04-09 06:46:23 UTC

Tested the patch with libvirt upstream version v7.2.0-84-gafda589d05. No definitely lost any more.

valgrind --leak-check=full virsh set mem 100


==86243== LEAK SUMMARY:
==86243==    definitely lost: 0 bytes in 0 blocks
==86243==    indirectly lost: 0 bytes in 0 blocks
==86243==      possibly lost: 1,352 bytes in 18 blocks
==86243==    still reachable: 129,787 bytes in 926 blocks
==86243==                       of which reachable via heuristic:
==86243==                         newarray           : 1,536 bytes in 16 blocks
==86243==         suppressed: 0 bytes in 0 blocks
==86243== Reachable blocks (those to which a pointer was found) are not shown.
==86243== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==86243== 
==86243== For lists of detected and suppressed errors, rerun with: -s
==86243== ERROR SUMMARY: 18 errors from 18 contexts (suppressed: 0 from 0)

Comment 3 Ján Tomko 2021-04-09 11:14:14 UTC

Pushed as:
commit a131b8b517a88685ddb5f1b17c4d1a16b9a97b61
Author:     Ján Tomko <jtomko>
CommitDate: 2021-04-09 13:07:30 +0200

    vsh: fix memory leak in vshCommandParse
    
    One of the error branches used a plain free where vshCommandFree
    was required.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1943415
    
    Signed-off-by: Ján Tomko <jtomko>
    Reviewed-by: Erik Skultety <eskultet>

git describe: v7.2.0-85-ga131b8b517

Comment 6 Jing Qi 2021-05-14 12:37:59 UTC

Verified with libvirt-daemon-7.3.0-1.module+el8.5.0+11004+f4810536.x86_64  
& qemu-kvm-6.0.0-16.module+el8.5.0+10848+2dccc46d.x86_64

Steps as comment2.

Comment 8 errata-xmlrpc 2021-11-16 07:52:31 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 (virt:av bug fix and enhancement update), and where to find the updated
files, follow the link below.

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

https://access.redhat.com/errata/RHBA-2021:4684