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[Launchpad Bug Tracker <1540390@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.4.0-9.24

---------------
linux (4.4.0-9.24) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1551319

  * AppArmor logs denial for when the device path is ENOENT (LP: #1482943)
    - SAUCE: apparmor: fix log of apparmor audit message when kern_path() fails

  * BUG: unable to handle kernel NULL pointer dereference (aa_label_merge) (LP:
    #1448912)
    - SAUCE: apparmor: Fix: insert race between label_update and label_merge
    - SAUCE: apparmor: Fix: ensure aa_get_newest will trip debugging if the
      replacedby is not setup
    - SAUCE: apparmor: Fix: label merge handling of marking unconfined and stale
    - SAUCE: apparmor: Fix: refcount race between locating in labelset and get
    - SAUCE: apparmor: Fix: ensure new labels resulting from merge have a
      replacedby
    - SAUCE: apparmor: Fix: label_vec_merge insertion
    - SAUCE: apparmor: Fix: deadlock in aa_put_label() call chain
    - SAUCE: apparmor: Fix: add required locking of __aa_update_replacedby on
      merge path
    - SAUCE: apparmor: Fix: convert replacedby update to be protected by the
      labelset lock
    - SAUCE: apparmor: Fix: update replacedby allocation to take a gfp parameter

  * apparmor kernel BUG kills firefox (LP: #1430546)
    - SAUCE: apparmor: Disallow update of cred when then subjective != the
      objective cred
    - SAUCE: apparmor: rework retrieval of the current label in the profile update
      case

  * sleep from invalid context in aa_move_mount (LP: #1539349)
    - SAUCE: apparmor: fix sleep from invalid context

  * s390x: correct restore of high gprs on signal return (LP: #1550468)
    - s390/compat: correct restore of high gprs on signal return

  * missing SMAP support (LP: #1550517)
    - x86/entry/compat: Add missing CLAC to entry_INT80_32

  * Floating-point exception handler receives empty Data-Exception Code in
    Floating Point Control register (LP: #1548414)
    - s390/fpu: signals vs. floating point control register

  * kvm fails to boot GNU Hurd kernels with 4.4 Xenial kernel (LP: #1550596)
    - KVM: x86: fix conversion of addresses to linear in 32-bit protected mode

  * Surelock GA2 SP1: capiredp01: cxl_init_adapter fails for CAPI devices
    0000:01:00.0 and 0005:01:00.0 after upgrading to 840.10 Platform firmware
    build fips840/b1208b_1604.840 (LP: #1532914)
    - cxl: Fix PSL timebase synchronization detection

  * [Feature]EDAC support for Knights Landing (LP: #1519631)
    - EDAC, sb_edac: Set fixed DIMM width on Xeon Knights Landing

  * Various failures of kernel_security suite on Xenial kernel on s390x arch
    (LP: #1531327)
    - [config] s390x -- CONFIG_DEFAULT_MMAP_MIN_ADDR=65536

  * Unable to install VirtualBox Guest Service in 15.04 (LP: #1434579)
    - [Config] Provides: virtualbox-guest-modules when appropriate

  * linux is missing provides for virtualbox-guest-modules [i386 amd64 x32] (LP:
    #1507588)
    - [Config] Provides: virtualbox-guest-modules when appropriate

  * Backport more recent driver for SKL, KBL and BXT graphics (LP: #1540390)
    - SAUCE: i915_bpo: Provide a backport driver for SKL, KBL & BXT graphics
    - SAUCE: i915_bpo: Update intel_ips.h file location
    - SAUCE: i915_bpo: Rename the backport driver to i915_bpo
    - SAUCE: i915_bpo: Add i915_bpo_*() calls for ubuntu/i915
    - drm/i915: remove an extra level of indirection in PCI ID list
    - drm/i915/kbl: Add Kabylake PCI ID
    - drm/i915/kbl: Add Kabylake GT4 PCI ID
    - mm: Export nr_swap_pages
    - async: export current_is_async()
    - drm: fix potential dangling else problems in for_each_ macros
    - dp/mst: add SDP stream support
    - drm: Implement drm_modeset_lock_all_ctx()
    - drm: Add "prefix" parameter to drm_rect_debug_print()
    - drm/i915: Set connector_state->connector using the helper.
    - drm/atomic: add connector mask to drm_crtc_state.
    - drm/i915: Report context GTT size
    - drm/i915: Add get_eld audio component
    - SAUCE: Backport I915_PARAM_HAS_EXEC_SOFTPIN and EXEC_OBJECT_PINNED
    - SAUCE: i915_bpo: Revert passing plane/encoder name
    - SAUCE: sound/hda: Load i915_bpo from the hda driver on SKL/KBL/BXT
    - SAUCE: i915_bpo: Support only SKL, KBL and BXT with the backport driver
    - drm/i915/bxt: update list of PCIIDs
    - drm/i915/skl: Add missing SKL ids
    - SAUCE: i915_bpo: Revert "drm/i915: Defer probe if gmux is present but its
      driver isn't"
    - SAUCE: uapi/drm/i915: Backport I915_EXEC_BSD_MASK
    - drm/atomic: Do not unset crtc when an encoder is stolen
    - drm/i915: Update connector_mask during readout, v2.
    - drm/atomic: Add encoder_mask to crtc_state, v3.
    - SAUCE: drm/core: Add drm_encoder_index.
    - SAUCE: i915_bpo: Revert "drm/i915: Switch DDC when reading the EDID"
    - i915_bpo: [Config] Enable CONFIG_DRM_I915_BPO=m

  * arm64: guest hangs when ntpd is running (LP: #1549494)
    - hrtimer: Add support for CLOCK_MONOTONIC_RAW
    - hrtimer: Catch illegal clockids
    - KVM: arm/arm64: timer: Switch to CLOCK_MONOTONIC_RAW

  * Miscellaneous Ubuntu changes
    - [Debian] git-ubuntu-log -- wrap long bug and commit titles
    - [Config] CONFIG_ARM_SMMU=y on arm64
    - rebase to v4.4.3
    - [Debian] git-ubuntu-log -- ensure we get the last commit
    - [Config] fix up spelling of probably again
    - [Debian] perf -- build in the context of the full generated local headers
    - SAUCE: tools: lib/bpf -- add generated headers to search path
    - SAUCE: proc: Always set super block owner to init_user_ns
    - SAUCE: fix-up: kern_mount fail path should not be doing put_buffers()
    - SAUCE: apparmor: Fix: oops do to invalid null ptr deref in label print fns
    - SAUCE: apparmor: debug: POISON label and replaceby pointer on free
    - SAUCE: apparmor: add underscores to indicate aa_label_next_not_in_set() use
      needs locking
    - SAUCE: apparmor: Fix: refcount leak in aa_label_merge
    - SAUCE: apparmor: ensure that repacedby sharing is done correctly
    - SAUCE: apparmor Fix: refcount bug in pivotroot mediation
    - SAUCE: apparmor: Fix: now that insert can force replacement use it instead
      of remove_and_insert
    - SAUCE: apparmor: Fix: refcount bug when inserting label update that
      transitions ns
    - SAUCE: apparmor: Fix: break circular refcount for label that is directly
      freed.
    - SAUCE: apparmor: Don't remove label on rcu callback if the label has already
      been removed
    - SAUCE: apparmor: Fix: query label file permission
    - SAUCE: apparmor: fix: ref count leak when profile sha1 hash is read
    - SAUCE: fixup: cleanup return handling of labels
    - SAUCE: fix: replacedby forwarding is not being properly update when ns is
      destroyed
    - SAUCE: fixup: make __share_replacedby private to get rid of build warning
    - SAUCE: fixup: 20/23 locking issue around in __label_update
    - SAUCE: fixup: get rid of unused var build warning
    - SAUCE: fixup: cast poison values to remove warnings
    - SAUCE: apparmor: fix refcount race when finding a child profile
    - SAUCE: fixup: warning about aa_label_vec_find_or_create not being static
    - SAUCE: fix: audit "no_new_privs" case for exec failure
    - SAUCE: Fixup: __label_update() still doesn't handle some cases correctly.
    - SAUCE: Move replacedby allocation into label_alloc
    - [Debian] supply zfs dkms Provides: based on do_zfs
    - [Config] supply zfs dkms Provides: based on do_zfs
    - [Config] drop linux-image-3.0 provides

  * Miscellaneous upstream changes
    - x86/mpx: Fix off-by-one comparison with nr_registers

  [ Upstream Kernel Changes ]

  * rebase to v4.4.3

 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>  Thu, 25 Feb 2016 19:47:55
-0700

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

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https://bugs.launchpad.net/bugs/1540390

Title:
  Backport more recent driver for SKL, KBL and BXT graphics

Status in initramfs-tools package in Ubuntu:
  New
Status in linux package in Ubuntu:
  Fix Released

Bug description:
  We need to support Skylake (SKL), Kabylake (KBL) and Broxton (BXT)
  graphics in xenial, but the kernel driver is not fresh enough for
  proper support.

  For the kernel the plan is to provide a separate driver module
  (i915_bpo) like for Skylake/Broadwell/Braswell in vivid. The drm/i915
  driver in 4.4 is not recent enough for SKL/KBL/BXT, so pulling the
  driver from current drm-intel-next branch would provide what'll end up
  in 4.6. The i915 drivers will be modified so that only i915_bpo loads
  on SKL/KBL/BXT machines, and only there. The driver will get further
  updates along the way, and possibly also rebased to a later kernel
  release.

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