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[Launchpad Bug Tracker <1658270@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.13.0-109.156

---------------
linux (3.13.0-109.156) trusty; urgency=low

  [ Thadeu Lima de Souza Cascardo ]

  * Release Tracking Bug
    - LP: #1662186

  [ Luis Henriques ]
  * Backport Dirty COW patch to prevent wineserver freeze (LP: #1658270)
    - ARM: 7985/1: mm: implement pte_accessible for faulting mappings
    - ARM: 8108/1: mm: Introduce {pte,pmd}_isset and {pte,pmd}_isclear
    - ARM: 8037/1: mm: support big-endian page tables
    - ARM: 8109/1: mm: Modify pte_write and pmd_write logic for LPAE
    - arm64: mm: Route pmd thp functions through pte equivalents
    - mm: fix huge zero page accounting in smaps report
    - SAUCE: mm: Respect FOLL_FORCE/FOLL_COW for thp

  * kernel BUG at skbuff.h:1486 Insufficient linear data in skb
    __skb_pull.part.7+0x4/0x6 [openvswitch] (LP: #1655683)
    - SAUCE: openvswitch: gre: filter gre packets

  * CVE-2016-7911
    - block: fix use-after-free in sys_ioprio_get()

  * CVE-2016-7910
    - block: fix use-after-free in seq file

  * Xen MSI setup code incorrectly re-uses cached pirq (LP: #1656381)
    - SAUCE: xen: do not re-use pirq number cached in pci device msi msg data

 -- Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>  Tue, 07 Feb
2017 09:26:42 -0200

** Changed in: linux (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-7910

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-7911

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https://bugs.launchpad.net/bugs/1658270

Title:
  Backport Dirty COW patch to prevent wineserver freeze

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Precise:
  In Progress
Status in linux source package in Trusty:
  Fix Released
Status in linux source package in Vivid:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Released

Bug description:
  A few kernels updates ago (after kernel 3.13.0-98) on 14.04 (Trusty) a
  backported fix for Dirty COW from kernel 4.8.3 resulted in some Delphi
  apps freezing wineserver and leaving it unkillable:

  https://bugs.winehq.org/show_bug.cgi?id=41637

  I haven't tested for the bug on 16.04 Xenial (kernel 4.4.0-59) but it
  is probably affected.  A patch is available:

  https://lkml.org/lkml/2017/1/5/13
  --- 
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  jhansonxi   2775 F.... pulseaudio
   /dev/snd/controlC2:  jhansonxi   2775 F.... pulseaudio
   /dev/snd/controlC0:  jhansonxi   2775 F.... pulseaudio
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=UUID=6c1d3a04-0529-476c-b193-3e584c0333ca
  JournalErrors:
   Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
         Users in the 'systemd-journal' group can see all messages. Pass -q to
         turn off this notice.
   No journal files were opened due to insufficient permissions.
  MachineType: System manufacturer System Product Name
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  Package: linux (not installed)
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-59-generic root=/dev/mapper/vg0-lv1 ro quiet nosplash
  ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-59-generic N/A
   linux-backports-modules-4.4.0-59-generic  N/A
   linux-firmware                            1.157.6
  RfKill:
   
  Tags:  xenial
  Uname: Linux 4.4.0-59-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: dialout
  WifiSyslog:
   
  _MarkForUpload: True
  dmi.bios.date: 11/26/2008
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1206
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M3A78-EM
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1206:bd11/26/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM3A78-EM:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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