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ae09988eb7
Commit id '71ce4759' altered the cgroup processing with respect to the call to virCgroupAddTask being moved out from lower layers into the calling layers especially for qemu processing of emulator and vcpu threads. The movement affected lxc insomuch as it is possible for a code path to return a NULL cgroup *and* a 0 return status via virCgroupNewPartition failure when virCgroupNewIgnoreError succeeded when virCgroupNewMachineManual returns. Coverity pointed out that would cause virCgroupAddTask to core. This patch will check for a NULL cgroup as well as the negative return and just return the NULL cgroup to the caller (as it would have previously)
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>