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[Launchpad Bug Tracker <1520411@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.3.0-5.16

---------------
linux (4.3.0-5.16) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1526986
  * [Config] Spell ignore.modules correctly
    Fixes FTBS

 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>  Wed, 16 Dec 2015 15:52:52
-0700

** Changed in: linux (Ubuntu Xenial)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1520411

Title:
  powerpc/tm: Fix local DoS

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Fix Committed
Status in linux source package in Vivid:
  Fix Committed
Status in linux source package in Wily:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released

Bug description:
  The following two fixes have just made it into mpes powerpc fixes
  tree:

    7f821fc powerpc/tm: Check for already reclaimed tasks
    d2b9d2a powerpc/tm: Block signal return setting invalid MSR state

  They fix local DoS  (userspace can crash the OS) on powerpc POWER8
  cpus for any kernel v3.9+

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