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[Launchpad Bug Tracker <1516971@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package lxc - 1.1.5-0ubuntu3

---------------
lxc (1.1.5-0ubuntu3) xenial; urgency=medium

  * Cherry-pick from upstream:
    - Fix preserve_ns to work on < 3.8 kernels. (LP: #1516971)
    - Fix process title rewrite to not mangle the environment. (LP: #1517107)

 -- Stéphane Graber <stgraber@xxxxxxxxxx>  Wed, 18 Nov 2015 13:30:41
-0500

** Changed in: lxc (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1516971

Title:
  LXC's preserve_ns fails on < 3.8 kernels

Status in Canonical System Image:
  Confirmed
Status in lxc package in Ubuntu:
  Fix Released
Status in lxc source package in Trusty:
  Fix Committed
Status in lxc source package in Vivid:
  Fix Committed
Status in lxc source package in Wily:
  Fix Committed
Status in lxc source package in Xenial:
  Fix Released

Bug description:
  == SRU ==
  Rationale: LXC no longer starts on kernels > 3.2 and < 3.8
  Test case: Try starting an LXC container on an affected kernel
  Regression potential: Can't really get any worse. Change has been reviewed and tested upstream.

  == Original bug report ==
  ubuntu-touch/devel-proposed/mako 350

  After flashing the device the boot hangs on the vendor logo.
  There is no crash file on the device but it seems that the android container fails to start.

  There is the following error in syslog
  Nov 17 08:33:15 ubuntu-phablet kernel: [    8.694826] init: lxc-android-config main process (918) terminated with status 255

  and in upstart/android.log:
        lxc-start 1447749195.286 ERROR    lxc_start - start.c:preserve_ns:149 - No such file or directory - failed to open '/proc/1055/ns/mnt'
        lxc-start 1447749195.286 ERROR    lxc_start - start.c:lxc_spawn:993 - failed to store namespace references
        lxc-start 1447749195.408 ERROR    lxc_start - start.c:__lxc_start:1192 - failed to spawn 'android'
        lxc-start 1447749195.758 ERROR    lxc_start_ui - lxc_start.c:main:344 - The container failed to start.
        lxc-start 1447749195.758 ERROR    lxc_start_ui - lxc_start.c:main:348 - Additional information can be obtained by setting the --logfile and --logpriority options.

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