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If the apparmor security driver is loaded/enabled and domain config contains a <seclabel> element whose type attribute is not 'apparmor', starting the domain fails when attempting to label resources such as tap FDs. Many of the apparmor driver entry points attempt to retrieve the apparmor security label from the domain def, returning failure if not found. Functions such as AppArmorSetFDLabel fail even though domain config contains an explicit 'none' secuirty driver, e.g. <seclabel type='none' model='none'/> Change the entry points to succeed if the domain config <seclabel> is not apparmor. This matches the behavior of the selinux driver.
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>