Public bug reported:

Description:    Ubuntu 14.04.5 LTS
Release:        14.04

Hi, after installing kernel 4.4.0-67 or later I cannot backup my Ubuntu VM's on 
Hyper-V.
Microsoft Hyper-v 2012r2 Gen2 VMs

See Attachment for what happens is immediately after backup starts I get
an error.

Eventually the kernel reports it has run out of memory and the machine
just continuously scrolls errors message related to page allocation.

When reseting the virtual machine no logs can be found of the problem.

kernel 4.4.0-72-generic problem still here

DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2016-02-20 (409 days ago)
InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64 
(20150805)
Package: linux-image-4.4.0-72-generic 4.4.0-72.93~14.04.1
PackageArchitecture: amd64
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 4.4.0-72.93~14.04.1-generic 4.4.49
SourcePackage: linux-lts-xenial
Tags:  trusty
Uname: Linux 4.4.0-72-generic x86_64

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

** Attachment added: "1033956.png"
   
https://bugs.launchpad.net/bugs/1679898/+attachment/4854939/+files/1033956.png

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1679898

Title:
  Ubuntu crash during Hyper-V backup after installing kernel 4.4.0-67 or
  later

Status in linux package in Ubuntu:
  New

Bug description:
  Description:    Ubuntu 14.04.5 LTS
  Release:        14.04

  Hi, after installing kernel 4.4.0-67 or later I cannot backup my Ubuntu VM's 
on Hyper-V.
  Microsoft Hyper-v 2012r2 Gen2 VMs

  See Attachment for what happens is immediately after backup starts I
  get an error.

  Eventually the kernel reports it has run out of memory and the machine
  just continuously scrolls errors message related to page allocation.

  When reseting the virtual machine no logs can be found of the problem.

  kernel 4.4.0-72-generic problem still here

  DistroRelease: Ubuntu 14.04
  InstallationDate: Installed on 2016-02-20 (409 days ago)
  InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64 
(20150805)
  Package: linux-image-4.4.0-72-generic 4.4.0-72.93~14.04.1
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=ru_RU.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 4.4.0-72.93~14.04.1-generic 4.4.49
  SourcePackage: linux-lts-xenial
  Tags:  trusty
  Uname: Linux 4.4.0-72-generic x86_64

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