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Bug 1030736 - libvirtd crash when create/destroy VM repeatedly
Summary: libvirtd crash when create/destroy VM repeatedly
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libvirt
Version: 6.5
Hardware: Unspecified
OS: Unspecified
urgent
urgent
Target Milestone: rc
: ---
Assignee: Michal Privoznik
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks: 1038816
TreeView+ depends on / blocked
 
Reported: 2013-11-15 03:26 UTC by yanbing du
Modified: 2016-04-26 14:42 UTC (History)
7 users (show)

Fixed In Version: libvirt-0.10.2-30.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-10-14 04:18:21 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2014:1374 0 normal SHIPPED_LIVE libvirt bug fix and enhancement update 2014-10-14 08:11:54 UTC

Comment 5 Michal Privoznik 2013-11-19 16:53:37 UTC 
Just for the record, this bug isn't reproducible on upstream nor RHEL-7.0. So I've run git bisect to find the commit which fixed the crash and found it was this one:

commit a9e97e0c3057dfaefc7217b7db7fbba001cf8f0b
Author:     Daniel P. Berrange <berrange>
AuthorDate: Wed Feb 6 18:17:20 2013 +0000
Commit:     Daniel P. Berrange <berrange>
CommitDate: Wed Feb 13 11:10:30 2013 +0000

    Remove qemuDriverLock from almost everywhere
    
    With the majority of fields in the virQEMUDriverPtr struct
    now immutable or self-locking, there is no need for practically
    any methods to be using the QEMU driver lock. Only a handful
    of helper APIs in qemu_conf.c now need it

v1.0.2-153-ga9e97e0

which has huge diff stat:

10 files changed, 388 insertions(+), 984 deletions(-)

so it is not desired to backport it into z-stream (among with all the preparation and follow up patches). So I'll work on a RHEL-only patch that will do for 6.5.z.
Comment 6 yanbing du 2013-11-20 06:27:38 UTC 
(In reply to Michal Privoznik from comment #5)
> Just for the record, this bug isn't reproducible on upstream nor RHEL-7.0.

Actually, there's a different behavor on RHEL7, see bug 1022924 comment 30.

> So I've run git bisect to find the commit which fixed the crash and found it
> was this one:
> 
> commit a9e97e0c3057dfaefc7217b7db7fbba001cf8f0b
> Author:     Daniel P. Berrange <berrange>
> AuthorDate: Wed Feb 6 18:17:20 2013 +0000
> Commit:     Daniel P. Berrange <berrange>
> CommitDate: Wed Feb 13 11:10:30 2013 +0000
> 
>     Remove qemuDriverLock from almost everywhere
>     
>     With the majority of fields in the virQEMUDriverPtr struct
>     now immutable or self-locking, there is no need for practically
>     any methods to be using the QEMU driver lock. Only a handful
>     of helper APIs in qemu_conf.c now need it
> 
> v1.0.2-153-ga9e97e0
> 
> which has huge diff stat:
> 
> 10 files changed, 388 insertions(+), 984 deletions(-)
> 
> so it is not desired to backport it into z-stream (among with all the
> preparation and follow up patches). So I'll work on a RHEL-only patch that
> will do for 6.5.z.
Comment 7 Michal Privoznik 2013-11-20 13:49:38 UTC 
I believe I got a patch that fixes the problem:

http://post-office.corp.redhat.com/archives/rhvirt-patches/2013-November/msg00958.html

A scratch build to test:

http://brewweb.devel.redhat.com/brew/taskinfo?taskID=6617467
Comment 8 Michal Privoznik 2013-11-20 16:44:18 UTC 
I've just realized my fix wasn't quite good. So round two of the patch among with a scratch build to test:

http://post-office.corp.redhat.com/archives/rhvirt-patches/2013-November/msg00964.html


http://brewweb.devel.redhat.com/brew/taskinfo?taskID=6618787
Comment 11 yanbing du 2014-04-14 07:48:55 UTC 
1. Reproduce this bug with libvirt-0.10.2-29.el6.x86_64
Steps:
Just run the following command in 3 terminals:
#while /bin/true ; do virsh create vm.xml ; virsh destroy rhel6 ; done

After a while(about 3 mins), libvirtd crashed.

2. Verify bug with libvirt-0.10.2-32.el6.x86_64. Re-run the command and libvirtd still running after 5 mins.
Comment 13 errata-xmlrpc 2014-10-14 04:18:21 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-2014-1374.html
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