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7cc101ce0e
The newly added call to qemuAuditNetDevice in qemuPhysIfaceConnect was assuming that res_ifname (the name of the macvtap device) was always valid, but this isn't the case. If openMacvtapTap fails, it always returns NULL, which would result in a segv. Since the audit log only needs a record of devices that are actually sent to qemu, and a failure to open the macvtap device means that no device will be sent to qemu, we can solve this problem by only doing the audit if openMacvtapTap is successful (in which case res_ifname is guaranteed valid).
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>