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[Andy Whitcroft <apw@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1478578

Title:
  "overlay" fs type not mountable in unprivileged containers

Status in linux package in Ubuntu:
  Fix Committed

Bug description:
  The "overlay" fstype is not mountable from within non-init user
  namespaces in wily. This is a regression wrt vivid and is causing LXC
  adt failures:

  https://jenkins.qa.ubuntu.com/job/wily-adt-lxc/lastBuild/

  To reproduce, assuming you have an unprivileged LXC container named
  u1:

   $ lxc-clone -s u1 u2
   $ lxc-start -n u2 --logfile=lxc.out --logpriority=DEBUG

  Starting u2 will fail, with the following in lxc.out:

   lxc-start 1438006183.232 ERROR    bdev - bdev.c:overlayfs_mount:2253
  - Operation not permitted - overlayfs: error mounting
  /home/ubuntu/.local/share/lxc/u1/rootfs onto /usr/lib/x86_64-linux-
  gnu/lxc options
  upperdir=/home/ubuntu/.local/share/lxc/u2/delta0,lowerdir=/home/ubuntu/.local/share/lxc/u1/rootfs,workdir=/home/ubuntu/.local/share/lxc/u2/olwork

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