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While the first encountered dns host record is being parsed, it's possible for virNetworkDef::hosts to point to memory that has been allocated, but virNetworkDef::nhosts to still be 0. If there is a failure during that time, virNetworkDef::hosts will be leaked. Although this isn't currently the case for virNetworkDef::txtrecords, it could become that way through future re-factoring, and it hurts nothing to restructure the freeing of txtrecord data to match that of hosts data.
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>