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[Launchpad Bug Tracker <1584953@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux-lts-utopic -
3.16.0-76.98~14.04.1

---------------
linux-lts-utopic (3.16.0-76.98~14.04.1) trusty; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1596019

  [ Upstream Kernel Changes ]

  * netfilter: x_tables: validate e->target_offset early
    - LP: #1555338
    - CVE-2016-3134
  * netfilter: x_tables: make sure e->next_offset covers remaining blob
    size
    - LP: #1555338
    - CVE-2016-3134
  * netfilter: x_tables: fix unconditional helper
    - LP: #1555338
    - CVE-2016-3134
  * netfilter: x_tables: don't move to non-existent next rule
    - LP: #1595350
  * netfilter: x_tables: validate targets of jumps
    - LP: #1595350
  * netfilter: x_tables: add and use xt_check_entry_offsets
    - LP: #1595350
  * netfilter: x_tables: kill check_entry helper
    - LP: #1595350
  * netfilter: x_tables: assert minimum target size
    - LP: #1595350
  * netfilter: x_tables: add compat version of xt_check_entry_offsets
    - LP: #1595350
  * netfilter: x_tables: check standard target size too
    - LP: #1595350
  * netfilter: x_tables: check for bogus target offset
    - LP: #1595350
  * netfilter: x_tables: validate all offsets and sizes in a rule
    - LP: #1595350
  * netfilter: x_tables: don't reject valid target size on some
    architectures
    - LP: #1595350
  * netfilter: arp_tables: simplify translate_compat_table args
    - LP: #1595350
  * netfilter: ip_tables: simplify translate_compat_table args
    - LP: #1595350
  * netfilter: ip6_tables: simplify translate_compat_table args
    - LP: #1595350
  * netfilter: x_tables: xt_compat_match_from_user doesn't need a retval
    - LP: #1595350
  * netfilter: x_tables: do compat validation via translate_table
    - LP: #1595350
  * netfilter: x_tables: introduce and use xt_copy_counters_from_user
    - LP: #1595350

linux-lts-utopic (3.16.0-75.97~14.04.1) trusty; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1595703

  [ Serge Hallyn ]

  * SAUCE: add a sysctl to disable unprivileged user namespace unsharing
    - LP: #1555338, #1595350

linux-lts-utopic (3.16.0-74.96~14.04.1) trusty; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1591324

  [ Kamal Mostafa ]

  * [debian] getabis: Only git add $abidir if running in local repo
    - LP: #1584890
  * [debian] getabis: Fix inconsistent compiler versions check
    - LP: #1584890

  [ Tim Gardner ]

  * [Config] Remove arc4 from nic-modules
    - LP: #1582991

  [ Upstream Kernel Changes ]

  * Revert "usb: hub: do not clear BOS field during reset device"
    - LP: #1582864
  * mm/balloon_compaction: redesign ballooned pages management
    - LP: #1572562
  * mm/balloon_compaction: fix deflation when compaction is disabled
    - LP: #1572562
  * ALSA: timer: Fix leak in SNDRV_TIMER_IOCTL_PARAMS
    - LP: #1580379
    - CVE-2016-4569
  * ALSA: timer: Fix leak in events via snd_timer_user_ccallback
    - LP: #1581866
    - CVE-2016-4578
  * ALSA: timer: Fix leak in events via snd_timer_user_tinterrupt
    - LP: #1581866
    - CVE-2016-4578
  * net: fix a kernel infoleak in x25 module
    - LP: #1585366
    - CVE-2016-4580
  * get_rock_ridge_filename(): handle malformed NM entries
    - LP: #1583962
    - CVE-2016-4913
  * netfilter: Set /proc/net entries owner to root in namespace
    - LP: #1584953
  * USB: usbfs: fix potential infoleak in devio
    - LP: #1578493
    - CVE-2016-4482
  * IB/security: Restrict use of the write() interface
    - LP: #1580372
    - CVE-2016-4565

 -- Luis Henriques <luis.henriques@xxxxxxxxxxxxx>  Fri, 24 Jun 2016
17:17:07 +0100

-- 
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https://bugs.launchpad.net/bugs/1584953

Title:
  backport fix for /proc/net issues with containers

Status in linux package in Ubuntu:
  Fix Released
Status in linux-lts-utopic package in Ubuntu:
  Invalid
Status in linux source package in Trusty:
  Fix Released
Status in linux-lts-utopic source package in Trusty:
  Fix Released
Status in linux source package in Vivid:
  Fix Released
Status in linux-lts-utopic source package in Vivid:
  Invalid
Status in linux source package in Wily:
  Fix Released
Status in linux-lts-utopic source package in Wily:
  Invalid
Status in linux source package in Xenial:
  Fix Released
Status in linux-lts-utopic source package in Xenial:
  Invalid

Bug description:
  SRU Justification

  Impact: iptables-save fails in lxd containers due to the ownership of
  /proc/net/ip_tables_names. This command is needed to manage firewalls
  in containers using Puppet.

  Fix: Upstream commit f13f2aeed154da8e48f90b85e720f8ba39b1e881
  ("netfilter: Set /proc/net entries owner to root in namespace") which
  sets ownership for /proc/net files to root in the user ns which owns
  the net ns.

  Test Case: Script attached to this bug report. Before the fix no
  output will be seen from iptables-save; after the fix it will output
  the iptables rules.

  ---

  Request to backport Kernel changes from Kernel 4.5 to lts kernel 4.4
  for xenial and if possible to lts kernel for 14.04

  Change upstream:
  netfilter: Set /proc/net entries owner to root in namespace
  http://git.kernel.org/cgit/linux/kernel/git/pablo/nf-next.git/commit/?id=f13f2aeed154da8e48f90b85e720f8ba39b1e881

  This is the Kernel-side part of the fix for "iptables-save does not work inside lxd containers"
  https://github.com/lxc/lxd/issues/1978#issuecomment-220998013

  The necessary changes in lxc landed in lxc/lxd
  https://github.com/lxc/lxc/pull/1014 and is available in version
  2.0.1, currently in xenial-proposed.

  It would be great if this would be backported asap. As it allows to
  manage the firewall within lxd instances using Puppet and probably
  other configuration management systems. And to use iptables-save
  manually

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