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Bug 1038816

Summary:	libvirtd crash when create/destroy VM repeatedly
Product:	Red Hat Enterprise Linux 6	Reporter:	Chris Pelland <cpelland>
Component:	libvirt	Assignee:	Michal Privoznik <mprivozn>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	6.5	CC:	acathrow, dallan, dyuan, eblake, mprivozn, mzhan, pm-eus, tlavigne, ydu, zhwang
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	libvirt-0.10.2-29.el6_5.2	Doc Type:	Bug Fix
Doc Text:	Cause: Two threads are working over the same domain. In fact, one is starting it, the other one is trying to destroy it. However, there is a race which can cause a domain to disappear in both threads leaving the start daemon access free()d memory. Consequence: The daemon crashes. Fix: The critical section was guarded by incrementing the reference counter of the domain. So whenver the domain is destroyed, the startup thread still holds the last reference which gets decremented once the startup process finishes. Result: The daemon crashes no more.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-12-18 09:24:55 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:
Bug Depends On:	1030736
Bug Blocks:

Description Chris Pelland 2013-12-05 21:14:11 UTC

This bug has been copied from bug #1030736 and has been proposed
to be backported to 6.5 z-stream (EUS).

Comment 4 Michal Privoznik 2013-12-06 07:54:51 UTC

Moving to POST:

http://post-office.corp.redhat.com/archives/rhvirt-patches/2013-December/msg00084.html

Comment 7 yanbing du 2013-12-12 07:00:25 UTC

Verify this bug with libvirt-0.10.2-29.el6_5.2.x86_64.

Run the following commands:

   while /bin/true ; do virsh create demovm.xml ; virsh destroy demovm ; done

in 3 separate terminal windows.

After more than 10 mins, libvirtd still running and there's no orphaned QEMU process appear.

Comment 9 errata-xmlrpc 2013-12-18 09:24:55 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-2013-1856.html