Bug 1147494 – libvirtd crashes when starting a domain with 0 cpu shares

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Bug 1147494 - libvirtd crashes when starting a domain with 0 cpu shares

Summary:	libvirtd crashes when starting a domain with 0 cpu shares

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	libvirt (Show other bugs)
Sub Component:
Version:	7.1
Hardware:	Unspecified Unspecified

Priority	unspecified Severity unspecified
Target Milestone:	rc
Target Release:	---
Assigned To:	Ján Tomko
QA Contact:	Virtualization Bugs
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2014-09-29 07:53 EDT by Ján Tomko
Modified:	2015-03-05 02:45 EST (History)
CC List:	7 users (show)

See Also:
Fixed In Version:	libvirt-1.2.8-5.el7
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-03-05 02:45:54 EST
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2015:0323	normal	SHIPPED_LIVE	Low: libvirt security, bug fix, and enhancement update	2015-03-05 07:10:54 EST

Groups: None (edit)

Description Ján Tomko 2014-09-29 07:53:52 EDT

Description of problem:
libvirtd crashes when starting a domain with 0 cpu shares

Version-Release number of selected component (if applicable):
libvirt-1.2.8-4.el7

How reproducible:
100 %

Steps to Reproduce:
1. Start a domain with <cputune><shares>0</shares></cputune>

Actual results:
Crash.

Expected results:
No crash.

Comment 1 Ján Tomko 2014-09-29 07:55:46 EDT

Upstream patch:
https://www.redhat.com/archives/libvir-list/2014-September/msg01676.html

Comment 2 Ján Tomko 2014-09-29 08:02:17 EDT

Fixed upstream:
commit e26bbf49cc051b5d5c2a86c572f55953e617e872
Author:     Ján Tomko <jtomko@redhat.com>
CommitDate: 2014-09-29 13:58:43 +0200

    Fix crash cpu_shares change event crash on domain startup
    
    Introduced by commit 0dce260.
    
    qemuDomainEventQueue was called with qemuDomainObjPrivatePtr instead
    of virQEMUDriverPtr.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1147494

git describe: v1.2.9-rc1-21-ge26bbf4

Comment 5 Jincheng Miao 2014-10-15 06:12:17 EDT

This bug could be reproduced in libvirt-1.2.8-4.el7:
# rpm -q libvirt
libvirt-1.2.8-4.el7.x86_64

# virsh edit r6
...
  <cputune>
    <shares>0</shares>
  </cputune>
...

# virsh start r6
error: Failed to start domain r6
error: End of file while reading data: Input/output error
error: Failed to reconnect to the hypervisor


But in latest libvirt-1.2.8-5.el7, it works:
# rpm -q libvirt
libvirt-1.2.8-5.el7.x86_64

# virsh edit r6
...
  <cputune>
    <shares>0</shares>
  </cputune>
...

# virsh start r6
Domain r6 started

So change the status to VERIFIED.

Comment 7 errata-xmlrpc 2015-03-05 02:45:54 EST

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.

https://rhn.redhat.com/errata/RHSA-2015-0323.html

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