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[Launchpad Bug Tracker <1425576@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.16.0-44.59

---------------
linux (3.16.0-44.59) utopic; urgency=low

  [ Brad Figg ]

  * Release Tracking Bug
    - LP: #1472030

  [ Iyappan Subramanian ]

  * SAUCE: (no-up) drivers: net: xgene: fix: Out of order descriptor bytes
    read
    - LP: #1425576

  [ Upstream Kernel Changes ]

  * Revert "tools/vm: fix page-flags build"
    - LP: #1471170
  * NVMe: Add shutdown timeout as module parameter.
    - LP: #1465136
  * Drivers: hv: vmbus: Add support for VMBus panic notifier handler
    - LP: #1463584
  * Drivers: hv: vmbus: Correcting truncation error for constant
    HV_CRASH_CTL_CRASH_NOTIFY
    - LP: #1463584
  * KVM: nVMX: fix lifetime issues for vmcs02
    - LP: #1448269
  * KVM: nVMX: Fix nested vmexit ack intr before load vmcs01
    - LP: #1448269
  * mm/slab_common: support the slub_debug boot option on specific object
    size
    - LP: #1456952
  * kvm: x86: fix kvm_apic_has_events to check for NULL pointer
  * cpuidle: powernv: Populate cpuidle state details by querying the
    device-tree
    - LP: #1470404
  * cpuidle: powernv: Read target_residency value of idle states from DT if
    available
    - LP: #1470404
  * cpuidle: powernv: Avoid endianness conversions while parsing DT
    - LP: #1470404
  * cpuidle: powernv/pseries: Auto-promotion of snooze to deeper idle state
    - LP: #1470404
  * iio: adis16400: Report pressure channel scale
    - LP: #1471170
  * iio: adis16400: Use != channel indices for the two voltage channels
    - LP: #1471170
  * iio: adis16400: Compute the scan mask from channel indices
    - LP: #1471170
  * iio: adis16400: Remove unused variable
    - LP: #1471170
  * iio: adis16400: Fix burst mode
    - LP: #1471170
  * iio: adis16400: Fix burst transfer for adis16448
    - LP: #1471170
  * USB: serial: ftdi_sio: Add support for a Motion Tracker Development
    Board
    - LP: #1471170
  * iio: adc: twl6030-gpadc: Fix modalias
    - LP: #1471170
  * serial: imx: Fix DMA handling for IDLE condition aborts
    - LP: #1471170
  * usb: dwc3: gadget: Fix incorrect DEPCMD and DGCMD status macros
    - LP: #1471170
  * ALSA: usb-audio: Add mic volume fix quirk for Logitech Quickcam Fusion
    - LP: #1471170
  * n_tty: Fix auditing support for cannonical mode
    - LP: #1471170
  * drm/i915/hsw: Fix workaround for server AUX channel clock divisor
    - LP: #1471170
  * x86/asm/irq: Stop relying on magic JMP behavior for early_idt_handlers
    - LP: #1471170
  * lib: Fix strnlen_user() to not touch memory after specified maximum
    - LP: #1471170
  * Input: elantech - fix detection of touchpads where the revision matches
    a known rate
    - LP: #1471170
  * ALSA: hda/realtek - Add a fixup for another Acer Aspire 9420
    - LP: #1471170
  * ALSA: usb-audio: add MAYA44 USB+ mixer control names
    - LP: #1471170
  * ALSA: usb-audio: fix missing input volume controls in MAYA44 USB(+)
    - LP: #1471170
  * USB: cp210x: add ID for HubZ dual ZigBee and Z-Wave dongle
    - LP: #1471170
  * Input: elantech - add new icbody type
    - LP: #1471170
  * MIPS: Fix enabling of DEBUG_STACKOVERFLOW
    - LP: #1471170
  * xfrm: fix a race in xfrm_state_lookup_byspi
    - LP: #1471170
  * kconfig: Fix warning "‘jump’ may be used uninitialized"
    - LP: #1471170
  * scripts/sortextable: suppress warning: `relocs_size' may be used
    uninitialized
    - LP: #1471170
  * thermal: step_wise: Revert optimization
    - LP: #1471170
  * MIPS: KVM: Do not sign extend on unsigned MMIO load
    - LP: #1471170
  * arch/x86/kvm/mmu.c: work around gcc-4.4.4 bug
    - LP: #1471170
  * net: core: Correct an over-stringent device loop detection.
    - LP: #1471170
  * net: phy: Allow EEE for all RGMII variants
    - LP: #1471170
  * net: dp83640: fix broken calibration routine.
    - LP: #1471170
  * net: dp83640: reinforce locking rules.
    - LP: #1471170
  * unix/caif: sk_socket can disappear when state is unlocked
    - LP: #1471170
  * xen/netback: Properly initialize credit_bytes
    - LP: #1471170
  * udp: fix behavior of wrong checksums
    - LP: #1471170
  * xen: netback: read hotplug script once at start of day.
    - LP: #1471170
  * ipv4/udp: Verify multicast group is ours in upd_v4_early_demux()
    - LP: #1471170
  * bridge: disable softirqs around br_fdb_update to avoid lockup
    - LP: #1471170
  * drm/i915: Assume dual channel LVDS if pixel clock necessitates it
    - LP: #1471170
  * Btrfs: send, add missing check for dead clone root
    - LP: #1471170
  * Btrfs: send, don't leave without decrementing clone root's
    send_progress
    - LP: #1471170
  * btrfs: incorrect handling for fiemap_fill_next_extent return
    - LP: #1471170
  * btrfs: cleanup orphans while looking up default subvolume
    - LP: #1471170
  * iommu/vt-d: Allow RMRR on graphics devices too
    - LP: #1471170
  * iommu/vt-d: Fix passthrough mode with translation-disabled devices
    - LP: #1471170
  * ata: ahci_mvebu: Fix wrongly set base address for the MBus window
    setting
    - LP: #1471170
  * virtio_pci: Clear stale cpumask when setting irq affinity
    - LP: #1471170
  * irqchip: sunxi-nmi: Fix off-by-one error in irq iterator
    - LP: #1471170
  * pata_octeon_cf: fix broken build
    - LP: #1471170
  * Input: synaptics - add min/max quirk for Lenovo S540
    - LP: #1471170
  * drm/i915: Fix DDC probe for passive adapters
    - LP: #1471170
  * cfg80211: wext: clear sinfo struct before calling driver
    - LP: #1471170
  * mm/memory_hotplug.c: set zone->wait_table to null after freeing it
    - LP: #1471170
  * ring-buffer-benchmark: Fix the wrong sched_priority of producer
    - LP: #1471170
  * block: fix ext_dev_lock lockdep report
    - LP: #1471170
  * iser-target: Fix variable-length response error completion
    - LP: #1471170
  * iser-target: release stale iser connections
    - LP: #1471170
  * ALSA: hda - adding a DAC/pin preference map for a HP Envy TS machine
    - LP: #1471170
  * drm/mgag200: Reject non-character-cell-aligned mode widths
    - LP: #1471170
  * crypto: caam - fix uninitialized state->buf_dma field
    - LP: #1471170
  * crypto: caam - improve initalization for context state saves
    - LP: #1471170
  * crypto: caam - fix RNG buffer cache alignment
    - LP: #1471170
  * tracing: Have filter check for balanced ops
    - LP: #1471170
  * drm/radeon: fix freeze for laptop with Turks/Thames GPU.
    - LP: #1471170
  * Linux 3.16.7-ckt14
    - LP: #1471170

 -- Brad Figg <brad.figg@xxxxxxxxxxxxx>  Mon, 06 Jul 2015 17:48:28 -0700

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

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2015-1805

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https://bugs.launchpad.net/bugs/1425576

Title:
  Occasional crash in APM xgene enet driver on kernels prior to v3.19

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Trusty:
  Fix Released
Status in linux source package in Utopic:
  Fix Released

Bug description:
  [Impact]
  System panics every few hours under constant network load

  [Test Case]
  On the X-Gene system, start an iperf server:
    $ iperf -s
  Connect to it from another system (1Gbps is sufficient)
    $ iperf -t 100000 -c <xgene host>

  On failure, you'll get a panic within several hours.

  [Regression Risk]
  The proposed patch only touches the impacted driver. It is adding a memory barrier - albeit a lightweight one - so there is the risk of a performance degradation. Indeed, when measured using a 60s iperf run, I do see a performance drop, but by < 0.5%.

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