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[Launchpad Bug Tracker <1744173@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.13.0-46.51

---------------
linux (4.13.0-46.51) artful; urgency=medium

  * linux: 4.13.0-46.51 -proposed tracker (LP: #1776333)

  * register on binfmt_misc may overflow and crash the system (LP: #1775856)
    - fs/binfmt_misc.c: do not allow offset overflow

  * CVE-2018-11508
    - compat: fix 4-byte infoleak via uninitialized struct field

  * rfi-flush: Switch to new linear fallback flush (LP: #1744173)
    - SAUCE: rfi-flush: Factor out init_fallback_flush()
    - SAUCE: rfi-flush: Move rfi_flush_fallback_area to end of paca
    - powerpc/64s: Improve RFI L1-D cache flush fallback
    - powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again
    - powerpc/rfi-flush: Differentiate enabled and patched flush types
    - powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration

  * Fix enabling bridge MMIO windows (LP: #1771344)
    - powerpc/eeh: Fix enabling bridge MMIO windows

  * CVE-2018-1130
    - dccp: check sk for closed state in dccp_sendmsg()

  * CVE-2018-7757
    - scsi: libsas: fix memory leak in sas_smp_get_phy_events()

  * cpum_sf: ensure sample freq is non-zero (LP: #1772593)
    - s390/cpum_sf: ensure sample frequency of perf event attributes is non-zero

  * wlp3s0: failed to remove key (1, ff:ff:ff:ff:ff:ff) from hardware (-22)
    (LP: #1720930)
    - iwlwifi: mvm: fix "failed to remove key" message

  * CVE-2018-6927
    - futex: Prevent overflow by strengthen input validation

  * After update to 4.13-43 Intel Graphics are Laggy (LP: #1773520)
    - SAUCE: Revert "drm/i915/edp: Allow alternate fixed mode for eDP if
      available."

  * ELANPAD ELAN0612 does not work, patch available (LP: #1773509)
    - SAUCE: Input: elan_i2c - add ELAN0612 to the ACPI table

  * kernel backtrace when receiving large UDP packages (LP: #1772031)
    - iov_iter: fix page_copy_sane for compound pages

  * FS-Cache: Assertion failed: FS-Cache: 6 == 5 is false (LP: #1774336)
    - SAUCE: CacheFiles: fix a read_waiter/read_copier race

  * CVE-2018-5803
    - sctp: verify size of a new chunk in _sctp_make_chunk()

  * enable mic-mute hotkey and led on Lenovo M820z and M920z (LP: #1774306)
    - ALSA: hda/realtek - Enable mic-mute hotkey for several Lenovo AIOs

  * CVE-2018-7755
    - SAUCE: floppy: Do not copy a kernel pointer to user memory in FDGETPRM ioctl

  * CVE-2018-5750
    - ACPI: sbshc: remove raw pointer from printk() message

 -- Khalid Elmously <khalid.elmously@xxxxxxxxxxxxx>  Mon, 11 Jun 2018
23:25:30 +0000

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

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-1130

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-11508

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-5750

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-5803

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-6927

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-7755

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-7757

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

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-3639

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-3665

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https://bugs.launchpad.net/bugs/1744173

Title:
  rfi-flush: Switch to new linear fallback flush

Status in The Ubuntu-power-systems project:
  Fix Committed
Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Artful:
  Fix Released

Bug description:
  [Impact]
  Change flush method from "congruence-first with dependencies" to "linear with no dependencies", which increases flush performance by 8x on P8, and
  3x on P9. Measured with null syscall loop, which will have the flush area in the L2 cache.

  The flush also becomes simpler and more adaptable to different cache
  geometries.

  [Test Case]
  TBD.

  [Regression Potential]
  The risk is deemed low since the changes are confined to POWER only and the provided test kernels have been tested by IBM.

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