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[Serge Hallyn <1543367@xxxxxxxxxxxxxxxxxx>]

Upstream kernel still fails:

      lxc-start 20160304193125.498 ERROR    lxc_conf - conf.c:lxc_mount_auto_mounts:742 - Operation not permitted - error mounting proc on /usr/lib/x86_64-linux-gnu/lxc/proc flags 14
lxc-start: conf.c: lxc_mount_auto_mounts: 742 Operation not permitted - error mounting proc on /usr/lib/x86_64-linux-gnu/lxc/proc flags 14


Linux x1 4.5.0-999-generic #201603032101 SMP Fri Mar 4 02:03:35 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux


** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

** Tags added: kernel-bug-exists-upstream

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https://bugs.launchpad.net/bugs/1543367

Title:
  nested unprileged container fails to start at mounting /proc

Status in linux package in Ubuntu:
  Confirmed
Status in lxc package in Ubuntu:
  Triaged

Bug description:
  Create a trusty or xenial host.  Probably use ubuntu-lxc/daily ppa to
  work around other bugs.

  Create a privileged container (again either trusty or xenial will do),
  and install ubuntu-lxc/daily ppa there.

  Create an unprivileged container in that container.  It will fail at
  mounting proc using safe_mount.  At this point it is mounting proc
  onto /proc/self/fd/14 flags 14.

        lxc-start 20160208234209.189 ERROR    lxc_utils -
  utils.c:safe_mount:1695 - Operation not permitted - Failed to mount
  proc onto /usr/lib/x86_64-linux-gnu/lxc/proc

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