Bug 531429

Summary: libvirt failed to disconnect and double free crashes on F12/rawhide with Xen
Product: [Fedora] Fedora Reporter: Pasi Karkkainen <pasik>
Component: libvirtAssignee: Mark McLoughlin <markmc>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: high    
Version: rawhideCC: berrange, clalance, crobinso, itamar, jforbes, markmc, veillard, virt-maint
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: libvirt-0.7.1-15.fc12 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-10-30 12:37:21 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Bug Depends On:    
Bug Blocks: 498969    

Description Pasi Karkkainen 2009-10-28 05:37:26 EDT
Description of problem:
On F12/rawhide host with Xen and pv_ops dom0 kernel
"virsh list" and "virsh --connect xen:/// version" terminate with 
"virsh: error: failed to disconnect from the hypervisor" error.

The latter also gives a crash:
"*** glibc detected *** virsh: double free or corruption (fasttop): 0x0000000000936250 ***"

Version-Release number of selected component (if applicable):

[root f12test ~]# rpm -qa | grep -i libvirt
libvirt-python-0.7.1-13.fc12.x86_64
libvirt-0.7.1-13.fc12.x86_64
libvirt-client-0.7.1-13.fc12.x86_64

[root f12test ~]# rpm -qa | grep -i xen
kernel-2.6.31.4-1.2.73.xendom0.fc12.x86_64
xen-3.4.1-5.fc12.x86_64
xen-runtime-3.4.1-5.fc12.x86_64
kernel-devel-2.6.31.4-1.2.73.xendom0.fc12.x86_64
xen-libs-3.4.1-5.fc12.x86_64
xen-hypervisor-3.4.1-5.fc12.x86_64


How reproducible:
Always

Steps to Reproduce:
1. Install F12/rawhide
2. Install Xen dom0 kernel and boot into Xen
3. run "virsh list" or "virsh --connect xen:/// version"
  
Actual results:
Errors and/or a virsh crash.

Expected results:
Works normally.

Additional info:
an email on libvirt-list suggests these bugs have been fixed in libvirt 0.7.2:
https://www.redhat.com/archives/libvir-list/2009-October/msg00754.html

More information:
https://www.redhat.com/archives/libvir-list/2009-October/msg00753.html
Comment 1 Mark McLoughlin 2009-10-29 06:42:38 EDT
Okay, AFAICT, these are the two fixes:

  http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=6ed7374c5a
  http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=1caa19cb06

I've pulled them into F-12 now:

* Thu Oct 29 2009 Mark McLoughlin <markmc@redhat.com> - 0.7.1-14
- Fix xen driver recounting (#531429)
- Fix crash on virsh error (#531429)
- Fix segfault where XML parsing fails in qemu disk hotplug
- Fix segfault where interface target device name is ommitted (#523418)

Will build and request tagging later
Comment 2 Pasi Karkkainen 2009-10-30 06:56:56 EDT
Ok, thanks.

I'll test it when it's available..
Comment 3 Mark McLoughlin 2009-10-30 11:45:53 EDT
tag request: https://fedorahosted.org/rel-eng/ticket/2927
Comment 4 Pasi Karkkainen 2009-11-06 07:56:57 EST
0.7.1-15 in rawhide seems to work OK with Xen.

Thanks again!