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CVE-2013-6458 Generally, every API that is going to begin a job should do that before fetching data from vm->def. However, qemuDomainGetBlockInfo does not know whether it will have to start a job or not before checking vm->def. To avoid using disk alias that might have been freed while we were waiting for a job, we use its copy. In case the disk was removed in the meantime, we will fail with "cannot find statistics for device '...'" error message. (cherry picked from commit b799259583bd65c0b2f5042e6c3ff19637ade881)
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>