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[Launchpad Bug Tracker <1655040@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.9.0-12.13

---------------
linux (4.9.0-12.13) zesty; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1655122

  * Zesty update to v4.9.2 stable release (LP: #1655114)
    - ssb: Fix error routine when fallback SPROM fails
    - ath10k: fix soft lockup during firmware crash/hw-restart
    - rtlwifi: Fix enter/exit power_save
    - perf/x86: Fix exclusion of BTS and LBR for Goldmont
    - perf annotate: Don't throw error for zero length symbols
    - perf/x86/intel/cstate: Prevent hotplug callback leak
    - rtl8xxxu: Work around issue with 8192eu and 8723bu devices not reconnecting
    - cfg80211/mac80211: fix BSS leaks when abandoning assoc attempts
    - ath9k: fix ath9k_hw_gpio_get() to return 0 or 1 on success
    - ath9k: Really fix LED polarity for some Mini PCI AR9220 MB92 cards.
    - ath9k: do not return early to fix rcu unlocking
    - Revert "mmc: sdhci: Reset cmd and data circuits after tuning failure"
    - mmc: sdhci: Fix recovery from tuning timeout
    - regulator: stw481x-vmmc: fix ages old enable error
    - mmc: sd: Meet alignment requirements for raw_ssr DMA
    - timekeeping_Force_unsigned_clocksource_to_nanoseconds_conversion
    - gpio: stmpe: fix interrupt handling bug
    - gpio: chardev: Return error for seek operations
    - arm64: tegra: Add VDD_GPU regulator to Jetson TX1
    - clk: bcm2835: Avoid overwriting the div info when disabling a pll_div clk
    - thermal: hwmon: Properly report critical temperature in sysfs
    - docs: sphinx-extensions: make rstFlatTable work with docutils 0.13
    - hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels()
    - staging/lustre/osc: Revert erroneous list_for_each_entry_safe use
    - staging: lustre: ldlm: pl_recalc time handling is wrong
    - staging: comedi: ni_mio_common: fix M Series ni_ai_insn_read() data mask
    - staging: comedi: ni_mio_common: fix E series ni_ai_insn_read() data
    - ACPI / video: Add force_native quirk for Dell XPS 17 L702X
    - ACPI / video: Add force_native quirk for HP Pavilion dv6
    - drm/amdgpu/si: load the proper firmware on 0x87 oland boards
    - drm/amdgpu: add additional pci revision to dpm workaround
    - drm/amdgpu: Store CRTC relative amdgpu_crtc->cursor_x/y values
    - drm/amdgpu: Also call cursor_move_locked when the cursor size changes
    - drm/amd/amdgpu: enable GUI idle INT after enabling CGCG
    - drm/nouveau/gr: fallback to legacy paths during firmware lookup
    - drm/nouveau/kms: lvds panel strap moved again on maxwell
    - drm/nouveau/bios: require checksum to match for fast acpi shadow method
    - drm/nouveau/ltc: protect clearing of comptags with mutex
    - drm/nouveau/ttm: wait for bo fence to signal before unmapping vmas
    - drm/nouveau/i2c/gk110b,gm10x: use the correct implementation
    - drm/nouveau/fifo/gf100-: protect channel preempt with subdev mutex
    - drm/radeon: Also call cursor_move_locked when the cursor size changes
    - drm/radeon: Hide the HW cursor while it's out of bounds
    - drm/radeon: add additional pci revision to dpm workaround
    - drm/radeon/si: load the proper firmware on 0x87 oland boards
    - drm/gma500: Add compat ioctl
    - drm/amd/powerplay: bypass fan table setup if no fan connected
    - drm/amdgpu: fix enable_cp_power_gating in gfx_v8.0.
    - drm/amdgpu: fix init save/restore list in gfx_v8.0
    - drivers/gpu/drm/ast: Fix infinite loop if read fails
    - mei: request async autosuspend at the end of enumeration
    - mei: me: add lewisburg device ids
    - block: protect iterate_bdevs() against concurrent close
    - vt: fix Scroll Lock LED trigger name
    - stm class: Fix device leak in open error path
    - scsi: megaraid_sas: For SRIOV enabled firmware, ensure VF driver waits for
      30secs before reset
    - scsi: megaraid_sas: Do not set MPI2_TYPE_CUDA for JBOD FP path for FW which
      does not support JBOD sequence map
    - iscsi-target: Return error if unable to add network portal
    - scsi: zfcp: fix use-after-"free" in FC ingress path after TMF
    - scsi: zfcp: do not trace pure benign residual HBA responses at default level
    - scsi: zfcp: fix rport unblock race with LUN recovery
    - scsi: avoid a permanent stop of the scsi device's request queue
    - ARC: mm: arc700: Don't assume 2 colours for aliasing VIPT dcache
    - firmware: fix usermode helper fallback loading
    - s390/vmlogrdr: fix IUCV buffer allocation
    - s390/kexec: use node 0 when re-adding crash kernel memory
    - arm64: KVM: pmu: Reset PMSELR_EL0.SEL to a sane value before entering the
      guest
    - latent_entropy: fix ARM build error on earlier gcc
    - sc16is7xx: Drop bogus use of IRQF_ONESHOT
    - md/raid5: limit request size according to implementation limits
    - scsi: aacraid: remove wildcard for series 9 controllers
    - KVM: PPC: Book3S HV: Save/restore XER in checkpointed register state
    - KVM: PPC: Book3S HV: Don't lose hardware R/C bit updates in H_PROTECT
    - kvm: nVMX: Allow L1 to intercept software exceptions (#BP and #OF)
    - fsnotify: Fix possible use-after-free in inode iteration on umount
    - vsock/virtio: fix src/dst cid format
    - platform/x86: asus-nb-wmi.c: Add X45U quirk
    - x86/smpboot: Make logical package management more robust
    - fgraph: Handle a case where a tracer ignores set_graph_notrace
    - IB/mad: Fix an array index check
    - IPoIB: Avoid reading an uninitialized member variable
    - IB/multicast: Check ib_find_pkey() return value
    - IB/rxe: Fix a memory leak in rxe_qp_cleanup()
    - IB/cma: Fix a race condition in iboe_addr_get_sgid()
    - mn88472: fix chip id check on probe
    - mn88473: fix chip id check on probe
    - s5p-mfc: fix failure path of s5p_mfc_alloc_memdev()
    - media: solo6x10: fix lockup by avoiding delayed register write
    - v4l: tvp5150: Add missing break in set control handler
    - Input: drv260x - fix input device's parent assignment
    - bad_inode: add missing i_op initializers
    - i40iw: Use correct src address in memcpy to rdma stats counters
    - PCI: Check for PME in targeted sleep state
    - libceph: verify authorize reply on connect
    - nfs_write_end(): fix handling of short copies
    - pNFS: On error, do not send LAYOUTGET until the LAYOUTRETURN has completed
    - pNFS: Don't clear the layout stateid if a layout return is outstanding
    - pNFS: Clear NFS_LAYOUT_RETURN_REQUESTED when invalidating the layout stateid
    - pNFS: Fix a deadlock between read resends and layoutreturn
    - SUNRPC: fix refcounting problems with auth_gss messages.
    - powerpc/64e: Convert cmpi to cmpwi in head_64.S
    - powerpc/ps3: Fix system hang with GCC 5 builds
    - powerpc/boot: Request no dynamic linker for boot wrapper
    - of, numa: Return NUMA_NO_NODE from disable of_node_to_nid() if nid not
      possible.
    - libnvdimm, pfn: fix align attribute
    - kconfig/nconf: Fix hang when editing symbol with a long prompt
    - sg_write()/bsg_write() is not fit to be called under KERNEL_DS
    - net: mvpp2: fix dma unmapping of TX buffers for fragments
    - drm/i915/dsi: Fix chv_exec_gpio disabling the GPIOs it is setting
    - drm/i915/dsi: Do not clear DPOUNIT_CLOCK_GATE_DISABLE from
      vlv_init_display_clock_gating
    - drm/i915: Fix cdclk vs. dev_cdclk mess when not recomputing things
    - drm/i915: Initialize dev_priv->atomic_cdclk_freq at init time
    - drm/i915: skip the first 4k of stolen memory on everything >= gen8
    - drm/i915: Fix setting of boost freq tunable
    - Linux 4.9.2

  * Zesty update to v4.9.1 stable release (LP: #1655082)
    - Revert "UBUNTU: SAUCE: (noup) ptrace: being capable wrt a process requires
      mapped uids/gids"
    - hotplug: Make register and unregister notifier API symmetric
    - btrfs: limit async_work allocation and worker func duration
    - Btrfs: fix BUG_ON in btrfs_mark_buffer_dirty
    - Btrfs: fix deadlock caused by fsync when logging directory entries
    - Btrfs: fix tree search logic when replaying directory entry deletes
    - Btrfs: fix relocation incorrectly dropping data references
    - btrfs: store and load values of stripes_min/stripes_max in balance status
      item
    - Btrfs: fix emptiness check for dirtied extent buffers at check_leaf()
    - Btrfs: fix qgroup rescan worker initialization
    - USB: serial: option: add support for Telit LE922A PIDs 0x1040, 0x1041
    - USB: serial: option: add dlink dwm-158
    - USB: serial: kl5kusb105: fix open error path
    - USB: cdc-acm: add device id for GW Instek AFG-125
    - usb: dwc3: gadget: set PCM1 field of isochronous-first TRBs
    - usb: hub: Fix auto-remount of safely removed or ejected USB-3 devices
    - usb: core: usbport: Use proper LED API to fix potential crash
    - usb: gadget: f_uac2: fix error handling at afunc_bind
    - usb: gadget: composite: correctly initialize ep->maxpacket
    - USB: UHCI: report non-PME wakeup signalling for Intel hardware
    - usbip: vudc: fix: Clear already_seen flag also for ep0
    - ALSA: usb-audio: Add QuickCam Communicate Deluxe/S7500 to
      volume_control_quirks
    - ALSA: hiface: Fix M2Tech hiFace driver sampling rate change
    - ALSA: hda/ca0132 - Add quirk for Alienware 15 R2 2016
    - ALSA: hda - ignore the assoc and seq when comparing pin configurations
    - ALSA: hda - fix headset-mic problem on a Dell laptop
    - ALSA: hda - Gate the mic jack on HP Z1 Gen3 AiO
    - ALSA: hda: when comparing pin configurations, ignore assoc in addition to
      seq
    - clk: ti: omap36xx: Work around sprz319 advisory 2.1
    - exec: Ensure mm->user_ns contains the execed files
    - fs: exec: apply CLOEXEC before changing dumpable task flags
    - splice: reinstate SIGPIPE/EPIPE handling
    - block_dev: don't test bdev->bd_contains when it is not stable
    - mm: Add a user_ns owner to mm_struct and fix ptrace permission checks
    - vfs,mm: fix return value of read() at s_maxbytes
    - ptrace: Capture the ptracer's creds not PT_PTRACE_CAP
    - ptrace: Don't allow accessing an undumpable mm
    - crypto: caam - fix AEAD givenc descriptors
    - ext4: don't lock buffer in ext4_commit_super if holding spinlock
    - ext4: fix mballoc breakage with 64k block size
    - ext4: fix stack memory corruption with 64k block size
    - ext4: use more strict checks for inodes_per_block on mount
    - ext4: fix in-superblock mount options processing
    - ext4: add sanity checking to count_overhead()
    - ext4: reject inodes with negative size
    - ext4: return -ENOMEM instead of success
    - ext4: do not perform data journaling when data is encrypted
    - Revert "f2fs: use percpu_counter for # of dirty pages in inode"
    - f2fs: set ->owner for debugfs status file's file_operations
    - f2fs: fix overflow due to condition check order
    - f2fs: fix to determine start_cp_addr by sbi->cur_cp_pack
    - loop: return proper error from loop_queue_rq()
    - nvmet: Fix possible infinite loop triggered on hot namespace removal
    - mm/vmscan.c: set correct defer count for shrinker
    - mm, page_alloc: keep pcp count and list contents in sync if struct page is
      corrupted
    - usb: gadget: composite: always set ep->mult to a sensible value
    - PM / OPP: Pass opp_table to dev_pm_opp_put_regulator()
    - PM / OPP: Don't use OPP structure outside of rcu protected section
    - blk-mq: Do not invoke .queue_rq() for a stopped queue
    - dm table: fix 'all_blk_mq' inconsistency when an empty table is loaded
    - dm table: an 'all_blk_mq' table must be loaded for a blk-mq DM device
    - dm flakey: return -EINVAL on interval bounds error in flakey_ctr()
    - dm crypt: mark key as invalid until properly loaded
    - dm rq: fix a race condition in rq_completed()
    - dm raid: fix discard support regression
    - dm space map metadata: fix 'struct sm_metadata' leak on failed create
    - ASoC: intel: Fix crash at suspend/resume without card registration
    - cifs: Fix smbencrypt() to stop pointing a scatterlist at the stack
    - CIFS: Fix a possible memory corruption during reconnect
    - CIFS: Fix missing nls unload in smb2_reconnect()
    - CIFS: Fix a possible double locking of mutex during reconnect
    - CIFS: Decrease verbosity of ioctl call
    - CIFS: Fix a possible memory corruption in push locks
    - kernel/watchdog: use nmi registers snapshot in hardlockup handler
    - watchdog: mei_wdt: request stop on reboot to prevent false positive event
    - watchdog: qcom: fix kernel panic due to external abort on non-linefetch
    - kernel/debug/debug_core.c: more properly delay for secondary CPUs
    - tpm xen: Remove bogus tpm_chip_unregister
    - xen/gntdev: Use VM_MIXEDMAP instead of VM_IO to avoid NUMA balancing
    - arm/xen: Use alloc_percpu rather than __alloc_percpu
    - xfs: fix up xfs_swap_extent_forks inline extent handling
    - xfs: set AGI buffer type in xlog_recover_clear_agi_bucket
    - builddeb: fix cross-building to arm64 producing host-arch debs
    - x86/kbuild: enable modversions for symbols exported from asm
    - Linux 4.9.1

  * i386 ftrace tests hang on ADT testing (LP: #1655040)
    - ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps
      to it

  * Ubuntu 16.10 KVM: Running out of memory if trying to bringup guest with more
    than 64VFs. (LP: #1654067)
    - powerpc/iommu: Pass mm_struct to init/cleanup helpers
    - powerpc/iommu: Stop using @current in mm_iommu_xxx
    - vfio/spapr: Postpone allocation of userspace version of TCE table
    - vfio/spapr: Add a helper to create default DMA window
    - vfio/spapr: Postpone default window creation
    - vfio/spapr: Reference mm in tce_container
    - powerpc/mm/iommu, vfio/spapr: Put pages on VFIO container shutdown

  *  IP-over-DDP packets dropped (LP: #1559772)
    - [Config] CONFIG_IPDDP=n

  * crypto : tolerate new crypto hardware for z Systems (LP: #1644557)
    - s390/zcrypt: Introduce CEX6 toleration

  * Miscellaneous Ubuntu changes
    - [Config] Update annotations with recent config changes
    - [Debian] consider renames in gen-auto-reconstruct

  * Note that CONFIG_MODVERSIONS=n since v4.9-rc4. It was causing i386
    modprobe issues because the CRC for some assembler variables were not
    being correctly computed. Linus disabled it altogether for 2 rc's,
    then restored it at the end in combination with some patches that
    set CRC to 0 for assembler variables. I chose to leave it disabled
    in light of the Ubuntu policy to revise the package ABI on every upload.

 -- Tim Gardner <tim.gardner@xxxxxxxxxxxxx>  Mon, 12 Dec 2016 13:08:33
-0700

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

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https://bugs.launchpad.net/bugs/1655040

Title:
  i386 ftrace tests hang on ADT testing

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  == SRU REQUEST, XENIAL, YAKKETY + ZESTY ==

  Running the autotest client ubuntu_kernel_selftests tests hang on i386
  because of a bug in the ftracing, resolved with upstream fix:

  commit 847fa1a6d3d00f3bdf68ef5fa4a786f644a0dd67
  ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it

  Although these have fixes ready to come down into -stable, lets SRU
  these in sooner than later.

  == Test ==

  Without the fix, the i386 kernel self tests always hang on the
  ftracing tests.  With the fix, it works perfectly.

  == Regression potential ==

  Minimal, this is a tried and tested patch, plus it matches the  fixes
  in the amd64 paths that were not ported over to the i386 paths which
  this fix now addresses.

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