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When parsing private domain data, there are two paths that are flawed. They are both error paths, just from different parts of the function. One of them can call free() on an uninitialized pointer. Initialization to NULL is enough here. The other one is a bit trickier to explain, but as easy as the first one to fix. We create capabilities, parse them and then assign them into the private data pointer inside the domain object. If, however, we get to fail from now on, the error path calls unrefs the capabilities and then, when the domain object is being cleaned, qemuDomainObjPrivateFree() tries to unref them as well. That causes a segfault. Settin the pointer to NULL upon successful addition to the private data is enough. Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
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>