Bug 744546

Summary: python version of libvirt produce segfault when connect second time
Product: [Community] Virtualization Tools Reporter: koder <kdanilov>
Component: libvirtAssignee: Libvirt Maintainers <libvirt-maint>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: berrange, crobinso, xen-maint
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-10-10 08:18:26 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description koder 2011-10-09 10:18:58 UTC
Description of problem:

Python bindings of libvirt generate segfault, when connect to hypervisor second time.

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

libvirt.getVersion() == 8008

How reproducible:

python -c "import libvirt; libvirt.virConnect('qemu:///session');libvirt.virConnect('qemu:///session')"

Steps to Reproduce:

python -c "import libvirt; libvirt.virConnect('qemu:///session');libvirt.virConnect('qemu:///session')"
  
Actual results:
segfault

Expected results:
no segfault :)

Additional info:

uname -a:
Linux koder-laptop 2.6.38-11-generic #50-Ubuntu SMP Mon Sep 12 21:17:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

qemu --version:
QEMU emulator version 0.14.0 (qemu-kvm-0.14.0), Copyright (c) 2003-2008 Fabrice Bellard

dpkg -l | grep kvm:
kvm  1:84+dfsg-0ubuntu16+0.14.0+noroms+0ubuntu4.4 
qemu 0.14.0+noroms-0ubuntu4.4                     
qemu-kvm   0.14.0+noroms-0ubuntu4.4

dpkg -l | grep libvirt:
libsys-virt-perl 0.2.4-1
libvirt-bin 0.8.8-1ubuntu6.5
libvirt0 0.8.8-1ubuntu6.5
libvirtodbc0 6.1.2+dfsg1-1ubuntu4
python-libvirt 0.8.8-1ubuntu6.5

Comment 1 Daniel Berrangé 2011-10-10 08:18:26 UTC
The 'libvirt.virConnect' constructor is expecting a python wrapper object for the 'virConnectPtr' C object instance. You are instead passing it a python string, hence the SEGV when it tries to use what it thinks is a virConnectPtr C object.

If you want to connect to libvirt use

  conn = libvirt.open("qemu:///session")