apparmor, virt-aa-helper: Explicit denies for host devices

Add explicit denies for disk devices to avoid cluttering dmesg with
(acceptable) denials.
Signed-off-by: NChristian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: NStefan Bader <stefan.bader@canonical.com>
Acked-by: NGuido Günther <agx@sigxcpu.org>

examples/apparmor/usr.lib.libvirt.virt-aa-helper

@@ -21,6 +21,15 @@ profile virt-aa-helper /usr/{lib,lib64}/libvirt/virt-aa-helper {
   # for hostdev
   /sys/devices/ r,
   /sys/devices/** r,
+  deny /dev/sd* r,
+  deny /dev/vd* r,
+  deny /dev/dm-* r,
+  deny /dev/drbd[0-9]* r,
+  deny /dev/dasd* r,
+  deny /dev/nvme* r,
+  deny /dev/zd[0-9]* r,
+  deny /dev/mapper/ r,
+  deny /dev/mapper/* r,
 
   /usr/{lib,lib64}/libvirt/virt-aa-helper mr,
   /{usr/,}sbin/apparmor_parser Ux,