Bug 497131
| Summary: | svirt fails to relabel qcow2 backing files | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Mark McLoughlin <markmc> |
| Component: | libvirt | Assignee: | Mark McLoughlin <markmc> |
| Status: | CLOSED RAWHIDE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | rawhide | CC: | berrange, clalance, crobinso, dwalsh, itamar, jbao, veillard, virt-maint |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2009-10-02 15:23:05 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: | |||
| Bug Blocks: | 498969 | ||
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle. Changing version to '11'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping *** Bug 525362 has been marked as a duplicate of this bug. *** Patches posted upstream for this: http://www.redhat.com/archives/libvir-list/2009-September/msg00740.html It's fairly invasive so, while I'll backport it to F12, I won't be backporting it to F11. Okay, I've backported this to F-12 and will build it later today * Thu Oct 1 2009 Mark McLoughlin <markmc> - 0.7.1-8 - Re-label qcow2 backing files (#497131) Patch is http://gitorious.org/~markmc/libvirt/fedora/commit/5bb2da190b This is in rawhide now |
If you create a qcow2 image with a backing file: $> qemu-img create -b f11-beta.qcow2 -f qcow2 f11-beta.snap1.qcow2 and configure a domain to use it: <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/var/lib/libvirt/images/f11-beta.snap2.qcow2'/> <target dev='hda' bus='ide'/> </disk> and start it: $> virsh start f11-beta error: Failed to start domain f11-beta error: internal error unable to start guest: qemu: could not open disk image /var/lib/libvirt/images/f11-beta.snap2.qcow2 type=AVC msg=audit(1240410685.659:86): avc: denied { read } for pid=9537 comm="qemu-kvm" name="f11-beta.qcow2" dev=dm-0 ino=3466427 scontext=system_u:system_r:svirt_t:s0:c280,c287 tcontext=system_u:object_r:virt_image_t:s0 tclass=file The problem is obvious - we're re-labelling the qcow2 image, but not its backing file. Note, the backing file should be read-only for all guests which use a qcow2 image backed by it.