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[Launchpad Bug Tracker <1557151@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.4.0-14.30

---------------
linux (4.4.0-14.30) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1557508

  * Current 4.4 kernel won't boot on powerpc (LP: #1557130)
    - powerpc: Fix dedotify for binutils >= 2.26

  * ZFS: send fails to transmit some holes [corruption] (LP: #1557151)
    - Illumos 6370 - ZFS send fails to transmit some holes

  * Request to cherry-pick uvcvideo patch for Xenial kernel support of RealSense
    camera (LP: #1557138)
    - UVC: Add support for ds4 depth camera

  * use after free of task_struct->numa_faults in task_numa_find_cpu (LP: #1527643)
    - sched/numa: Fix use-after-free bug in the task_numa_compare

  * overlay fs regression: chmod fails with "Operation not permitted" on chowned
    files (LP: #1555997)
    - ovl: copy new uid/gid into overlayfs runtime inode

  * Miscellaneous Ubuntu changes
    - SAUCE: Dump stack when X.509 certificates cannot be loaded

 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>  Mon, 14 Mar 2016 07:16:19
-0600

** Changed in: linux (Ubuntu Xenial)
       Status: Fix Committed => 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 Released
Status in zfs-linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released
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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