Unable to complete install: 'internal error: process exited while connecting to monitor: 2016-05-12T15:13:59.413935Z qemu-system-x86_64: -drive file=/media/nas/node2.img,format=qcow2,if=none,id=drive-ide0-0-0: Could not open '/media/nas/node2.img': Permission denied'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 90, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/create.py", line 2277, in _do_async_install
    guest.start_install(meter=meter)
  File "/usr/share/virt-manager/virtinst/guest.py", line 501, in start_install
    noboot)
  File "/usr/share/virt-manager/virtinst/guest.py", line 416, in _create_guest
    dom = self.conn.createLinux(start_xml or final_xml, 0)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3606, in createLinux
    if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self)
libvirtError: internal error: process exited while connecting to monitor: 2016-05-12T15:13:59.413935Z qemu-system-x86_64: -drive file=/media/nas/node2.img,format=qcow2,if=none,id=drive-ide0-0-0: Could not open '/media/nas/node2.img': Permission denied