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[Launchpad Bug Tracker <1636656@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.19.0-79.87

---------------
linux (3.19.0-79.87) vivid; urgency=low

  [ Thadeu Lima de Souza Cascardo ]

  * Release Tracking Bug
    - LP: #1651534

  [ Luis Henriques ]

  * CVE-2016-9756
    - KVM: x86: drop error recovery in em_jmp_far and em_ret_far

  * CVE-2016-9806
    - netlink: Fix dump skb leak/double free

  * CVE-2016-9794
    - ALSA: pcm : Call kill_fasync() in stream lock

  * [Hyper-V] netvsc: fix incorrect receive checksum offloading (LP: #1636656)
    - netvsc: fix incorrect receive checksum offloading

  * CVE-2016-9793
    - net: avoid signed overflows for SO_{SND|RCV}BUFFORCE

  * Ubuntu16.10 - EEH on BELL3 adapter fails to recover (serial/tty)
    (LP: #1646857)
    - serial: 8250_pci: Detach low-level driver during PCI error recovery

 -- Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>  Tue, 20 Dec
2016 15:35:23 -0200

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

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-9756

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-9793

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-9794

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-9806

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

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https://bugs.launchpad.net/bugs/1636656

Title:
  [Hyper-V] netvsc: fix incorrect receive checksum offloading

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

Bug description:
  The Hyper-V netvsc driver was looking at the incorrect status bits
  in the checksum info. It was setting the receive checksum unnecessary
  flag based on the IP header checksum being correct. The checksum
  flag is skb is about TCP and UDP checksum status. Because of this
  bug, any packet received with bad TCP checksum would be passed
  up the stack and to the application causing data corruption.
  The problem is reproducible via netcat and netem.

  This had a side effect of not doing receive checksum offload
  on IPv6. The driver was also also always doing checksum offload
  independent of the checksum setting done via ethtool.

  Signed-off-by: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>

  https://patchwork.ozlabs.org/patch/685660/

  When this patch is committed I will include the commit ID in this bug.

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