[Libvir] [PATCH] properly check buffer size in virDomainXMLDevID

As promised, a patch to protect the 80-character "device id" buffer from overflow by the unbounded "device=" XML attribute. Before, a large "device" attribute gave a stack overflow error; now it merely results in an obscure (but non-fatal) xend error like so: libvir: Xen Daemon error : POST operation failed: (xend.err "invalid literal for int() with base 10: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'") (the long string of "x"es was my way of overflowing the buffer). Please ACK... --Hugh -- Red Hat Virtualization Group http://redhat.com/virtualization Hugh Brock | virt-manager http://virt-manager.org hbrock(a)redhat.com | virtualization library http://libvirt.org