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pkgs
# rpm -qa|grep libvirt
libvirt-0.10.1-1.el6.x86_64
steps
1. Make sure selinux is Enforcing
# getenforce
Enforcing
2. Before set security_default_confined, prepare a guest, and start it, then check the guest's seclabel
# virsh dumpxml tesredhat |grep seclabel -A 3
<seclabel type='dynamic' model='selinux' relabel='yes'>
<label>unconfined_u:system_r:svirt_t:s0:c317,c596</label>
<imagelabel>unconfined_u:object_r:svirt_image_t:s0:c317,c596</imagelabel>
</seclabel>
</domain>
3. Set security_default_confined=0 in qemu.conf and restart libvirtd
4. Recheck the guest's seclabel
# virsh dumpxml tesredhat |grep seclabel -A 3
<seclabel type='dynamic' model='selinux' relabel='yes'>
<label>unconfined_u:system_r:svirt_t:s0:c317,c596</label>
<imagelabel>unconfined_u:object_r:svirt_image_t:s0:c317,c596</imagelabel>
</seclabel>
</domain>
5. Destroy the guest, and restart it
# virsh start tesredhat
Domain tesredhat started
# virsh dumpxml tesredhat |grep seclabel -A 3
<seclabel type='none' model='selinux'/>
</domain>
6. # ll -Z /var/lib/libvirt/images/tesredhat.img
-rw-r-xr-x. qemu qemu system_u:object_r:virt_image_t:s0 /var/lib/libvirt/images/tesredhat.img
7.# virsh dumpxml tesredhat --inactive |grep seclabel -A 3
BTW
I can reproduce this bug in the pkg libvirt-0.10.0-1.el6.x86_64
AS in step 5&6 ,guest can start normally
So, this is fixed.
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/RHSA-2013-0276.html
Fixed upstream with: commit 1497e36db97e257bbdb037066994aac5ca3e75f6 Author: Peter Krempa <pkrempa> Date: Thu Aug 30 16:05:53 2012 +0200 security: Re-apply commit ce53382ba28179d3a504b29b4f888b6e130d53f0 Recent changes in the security driver discarded changes that fixed labeling un-confined guests. Moving to POST.