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[Launchpad Bug Tracker <1301424@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.13.0-22.44

---------------
linux (3.13.0-22.44) trusty; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1301562

  [ dann frazier ]

  * [Config] enable linux-tools on arm64
    https://lists.ubuntu.com/archives/kernel-team/2014-April/041332.html

  [ Greg Kurz ]

  * SAUCE: powerpc/le: Big endian arguments for ppc_rtas()
    - LP: #1289518

  [ Mahesh Salgaonkar ]

  * SAUCE: powerpc/book3s: Fix CFAR clobbering issue in machine check
    handler.
    - LP: #1301424
  * SAUCE: powerpc/book3s: Recover from MC in sapphire on SCOM read via
    MMIO.
    - LP: #1301424
  * SAUCE: powerpc/book3s: Fix mc_recoverable_range buffer overrun issue.
    - LP: #1301424

  [ Paolo Pisati ]

  * [Config] armhf: USB_STORAGE=y
    https://lists.ubuntu.com/archives/kernel-team/2014-April/041349.html

  [ Stefan Bader ]

  * SAUCE: kvm: Force preempt folding in kvm on i386
    - LP: #1268906

  [ Tim Gardner ]

  * SAUCE: Drop lttng in favor of lttng-modules
    The kernel version was down rev on an rc release.

  [ Tomas Winkler ]

  * SAUCE: (no-up) mei: me: do not load the driver if the FW doesn't
    support MEI interface
    - LP: #1301118

  [ Upstream Kernel Changes ]

  * drm/i915: Deprecated UMS support
    - LP: #1284816
  * powerpc/book3s: Split the common exception prolog logic into two
    section.
    - LP: #1301424
  * powerpc/book3s: Introduce exclusive emergency stack for machine check
    exception.
    - LP: #1301424
  * powerpc/book3s: handle machine check in Linux host.
    - LP: #1301424
  * powerpc/book3s: Return from interrupt if coming from evil context.
    - LP: #1301424
  * powerpc/book3s: Introduce a early machine check hook in cpu_spec.
    - LP: #1301424
  * powerpc/book3s: Add flush_tlb operation in cpu_spec.
    - LP: #1301424
  * powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors
    on power7.
    - LP: #1301424
  * powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors
    on power8.
    - LP: #1301424
  * powerpc/book3s: Decode and save machine check event.
    - LP: #1301424
  * powerpc/book3s: Queue up and process delayed MCE events.
    - LP: #1301424
  * powerpc/powernv: Remove machine check handling in OPAL.
    - LP: #1301424
  * powerpc/powernv: Machine check exception handling.
    - LP: #1301424
  * powerpc: Fix "attempt to move .org backwards" error
    - LP: #1301424
  * powerpc: Fix endian issues in power7/8 machine check handler
    - LP: #1301424
  * Move precessing of MCE queued event out from syscall exit path.
    - LP: #1301424
 -- Andy Whitcroft <apw@xxxxxxxxxxxxx>   Wed, 02 Apr 2014 15:58:48 +0100

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

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https://bugs.launchpad.net/bugs/1301424

Title:
  powerpc: opal machine checks lead to kernel oops and application
  SIGSEGV

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Trusty:
  Fix Released

Bug description:
  We're suffering kernel Oopses on multiple Power machines running
  Ubuntu 14.04 beta levels, with kernels ranging from (at least) 3.13.0-16
  through 3.13.0-19. We are running Ubuntu directly on top of OPAL,
  without KVM.

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