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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1507959

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

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

** Tags added: trusty

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https://bugs.launchpad.net/bugs/1507959

Title:
  Regression: Kernel update breaks all lxc-containers lxc-start failing
  with  (apparmor="DENIED" operation="mount")

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hello,
  The following recent kernel update completely break our lxc-start usage on precise both with precise original kernel 3.2 + also the trusty-lts-stack using 3.13

  After installing those new kernel updates all lxc-start of a container fail with:
  "Permission denied - mount failed '/dev/pts/ptmx'->'/dev/ptmx'"

  with strace pointing to:
  13695 mount("/dev/pts/ptmx", "/dev/ptmx", 0x7f4d68c85d37, MS_BIND, NULL) = -1 EACCES (Permission denied)

  and dmesg showing:
  Oct 20 10:59:00 titan226 kernel: [  663.508664] type=1400 
                  audit(1445331540.807:29): apparmor="DENIED" operation="mount" 
                  info="failed type match" error=-13 profile="/usr/bin/lxc-start" 
                  name="/dev/ptmx" pid=2897 comm="lxc-start" 
                  srcname="/dev/pts/ptmx" flags="rw, bind"

  After downgrading kernel version the problem immediately dissappeared
  and the lxc-start for containers works again as before.

  Bad versions:
  ii  linux-image-3.13.0-66-generic    3.13.0-66.108~precise1            Linux kernel image for version 3.13.0 on 64 bit x86 SMP
  ii  linux-image-3.2.0-92-generic     3.2.0-92.130                      Linux kernel image for version 3.2.0 on 64 bit x86 SMP

  
  Good versions:
  ii  linux-image-3.13.0-61-generic    3.13.0-61.100~precise1            Linux kernel image for version 3.13.0 on 64 bit x86 SMP
  ii  linux-image-3.2.0-88-generic     3.2.0-88.126                      Linux kernel image for version 3.2.0 on 64 bit x86 SMP

  From kernel changelog maybe this other issue here maybe causing it but not verified:
    * SAUCE: (no-up) apparmor: fix mount not handling disconnected paths
      - LP: #1496430
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-61-generic.
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.0.1-0ubuntu17.11
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info: Error: [Errno 2] No such file or directory
  Card0.Amixer.values: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=ee5d3bc2-531d-4fbf-ba3f-033c27498274
  IwConfig: Error: [Errno 2] No such file or directory
  MachineType: FUJITSU PRIMERGY MX130 S1
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-61-generic root=UUID=8c11de07-6403-46cf-994b-15750a7404ba ro rootdelay=80
  ProcVersionSignature: Ubuntu 3.13.0-61.100~precise1-generic 3.13.11-ckt22
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-61-generic N/A
   linux-backports-modules-3.13.0-61-generic  N/A
   linux-firmware                             1.79.18
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  precise
  Uname: Linux 3.13.0-61-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  dmi.bios.date: 01/18/2011
  dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
  dmi.bios.version: 6.00 R1.01.2974.A1
  dmi.board.asset.tag: -
  dmi.board.name: D2974
  dmi.board.vendor: FUJITSU
  dmi.board.version: S26361-D2974-A1
  dmi.chassis.type: 3
  dmi.chassis.vendor: FUJITSU
  dmi.chassis.version: MX130S1F
  dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvr6.00R1.01.2974.A1:bd01/18/2011:svnFUJITSU:pnPRIMERGYMX130S1:pvr:rvnFUJITSU:rnD2974:rvrS26361-D2974-A1:cvnFUJITSU:ct3:cvrMX130S1F:
  dmi.product.name: PRIMERGY MX130 S1
  dmi.sys.vendor: FUJITSU

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