** Branch linked: lp:ubuntu/apparmor

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https://bugs.launchpad.net/bugs/959560

Title:
  deny mount does not work correctly

Status in AppArmor Linux application security framework:
  In Progress

Bug description:
  Given the following profile,

  
    profile lxc_container flags=(attach_disconnected) {
          umount,

          # ignore DENIED message on / remount
          # FIXME: doesn't match yet
          deny mount options=(ro, remount) -> /,

          # allow tmpfs mounts everywhere
          mount fstype=tmpfs,

          # allow bind mount of /lib/init/fstab for lxcguest
          mount options=(rw, bind) /lib/init/fstab.lxc/ -> /lib/init/fstab/,

          # deny writes in /proc/sys/fs but allow fusectl to be mounted
          mount fstype=binfmt_misc -> /proc/sys/fs/binfmt_misc/,

          # deny writes in /sys except for /sys/fs/cgroup, also allow
          # fusectl, securityfs and debugfs to be mounted there (read-only)
          mount fstype=fusectl -> /sys/fs/fuse/connections/,
          mount fstype=securityfs -> /sys/kernel/security/,
          mount fstype=debugfs -> /sys/kernel/debug/,
    }

  
  the rule
   
   deny mount options=(ro, remount) -> /,

   does not work correctly

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