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[Launchpad Bug Tracker <1557151@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package zfs-linux - 0.6.5.4-0ubuntu5

---------------
zfs-linux (0.6.5.4-0ubuntu5) xenial; urgency=medium

  * cherry-picked c352ec27d5c5ecea8f6af066258dfd106085eaac ('Illumos 6370 -
    ZFS send fails to transmit some holes')
    (LP: #1557151)

 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>  Mon, 14 Mar 2016 16:42:44
-0600

** Changed in: zfs-linux (Ubuntu Xenial)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1557151

Title:
  ZFS: send fails to transmit some holes [corruption]

Status in linux package in Ubuntu:
  Fix Committed
Status in zfs-linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in zfs-linux source package in Xenial:
  Fix Released

Bug description:
  https://github.com/zfsonlinux/zfs/commit/c352ec27d5c5ecea8f6af066258dfd106085eaac

  "In certain circumstances, "zfs send -i" (incremental send) can produce
  a stream which will result in incorrect sparse file contents on the
  target.

  The problem manifests as regions of the received file that should be
  sparse (and read a zero-filled) actually contain data from a file that
  was deleted (and which happened to share this file's object ID)."

  This bug causes data corruption, and has privacy/security
  implications. I think we need to get this fix into Xenial ASAP.

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