Public bug reported:

These log lines of "swap_dup: Bad swap file entry 2000000000000000"
preceded a false OOM kill of a process, which is being investigated in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842.

Also attached kern.log containing the full output.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-64-generic 4.4.0-64.85
ProcVersionSignature: Ubuntu 4.4.0-64.85-generic 4.4.44
Uname: Linux 4.4.0-64-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116,  1 Feb 24 09:21 seq
 crw-rw---- 1 root audio 116, 33 Feb 24 09:21 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
Date: Fri Mar  3 09:11:56 2017
HibernationDevice: RESUME=/dev/mapper/riemann1--vg-swap_1
InstallationDate: Installed on 2016-11-21 (101 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
JournalErrors:
 -- Logs begin at Wed 2017-03-01 21:57:47 CET, end at Fri 2017-03-03 08:57:33 
CET. --
 Mar 02 09:40:59 hostname systemd-tmpfiles[31014]: 
[/usr/lib/tmpfiles.d/var.conf:14] Duplicate line for path "/var/log", ignoring.
 Mar 03 08:56:34 hostname su[16784]: pam_authenticate: Authentication failure
Lsusb: Error: command ['lsusb'] failed with exit code 1:
MachineType: innotek GmbH VirtualBox
PciMultimedia:
 
ProcEnviron:
 LC_CTYPE=de_DE.UTF-8
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 vboxdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-64-generic 
root=/dev/mapper/hostname--vg-root ro biosdevname=0 net.ifnames=0 quiet
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-64-generic N/A
 linux-backports-modules-4.4.0-64-generic  N/A
 linux-firmware                            1.157.8
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:
 
dmi.bios.date: 12/01/2006
dmi.bios.vendor: innotek GmbH
dmi.bios.version: VirtualBox
dmi.board.name: VirtualBox
dmi.board.vendor: Oracle Corporation
dmi.board.version: 1.2
dmi.chassis.type: 1
dmi.chassis.vendor: Oracle Corporation
dmi.modalias: 
dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
dmi.product.name: VirtualBox
dmi.product.version: 1.2
dmi.sys.vendor: innotek GmbH

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug linux-image swap xenial

** Attachment added: "kern.log"
   https://bugs.launchpad.net/bugs/1669707/+attachment/4830536/+files/kern.log

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https://bugs.launchpad.net/bugs/1669707

Title:
  Possible swap corruption

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  These log lines of "swap_dup: Bad swap file entry 2000000000000000"
  preceded a false OOM kill of a process, which is being investigated in
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1655842.

  Also attached kern.log containing the full output.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-64-generic 4.4.0-64.85
  ProcVersionSignature: Ubuntu 4.4.0-64.85-generic 4.4.44
  Uname: Linux 4.4.0-64-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Feb 24 09:21 seq
   crw-rw---- 1 root audio 116, 33 Feb 24 09:21 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  Date: Fri Mar  3 09:11:56 2017
  HibernationDevice: RESUME=/dev/mapper/riemann1--vg-swap_1
  InstallationDate: Installed on 2016-11-21 (101 days ago)
  InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  JournalErrors:
   -- Logs begin at Wed 2017-03-01 21:57:47 CET, end at Fri 2017-03-03 08:57:33 
CET. --
   Mar 02 09:40:59 hostname systemd-tmpfiles[31014]: 
[/usr/lib/tmpfiles.d/var.conf:14] Duplicate line for path "/var/log", ignoring.
   Mar 03 08:56:34 hostname su[16784]: pam_authenticate: Authentication failure
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  MachineType: innotek GmbH VirtualBox
  PciMultimedia:
   
  ProcEnviron:
   LC_CTYPE=de_DE.UTF-8
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 vboxdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-64-generic 
root=/dev/mapper/hostname--vg-root ro biosdevname=0 net.ifnames=0 quiet
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-64-generic N/A
   linux-backports-modules-4.4.0-64-generic  N/A
   linux-firmware                            1.157.8
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:
   
  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: 
dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH

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