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[Launchpad Bug Tracker <1682644@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.4.0-96.119

---------------
linux (4.4.0-96.119) xenial; urgency=low

  * linux: 4.4.0-96.119 -proposed tracker (LP: #1716613)

  * kernel panic -not syncing: Fatal exception: panic_on_oops (LP: #1708399)
    - s390/mm: no local TLB flush for clearing-by-ASCE IDTE
    - SAUCE: s390/mm: fix local TLB flushing vs. detach of an mm address space
    - SAUCE: s390/mm: fix race on mm->context.flush_mm

  * CVE-2017-1000251
    - Bluetooth: Properly check L2CAP config option output buffer length

linux (4.4.0-95.118) xenial; urgency=low

  * linux: 4.4.0-95.118 -proposed tracker (LP: #1715651)

  * Xenial update to 4.4.78 stable release broke Address Sanitizer
    (LP: #1715636)
    - mm: revert x86_64 and arm64 ELF_ET_DYN_BASE base changes

linux (4.4.0-94.117) xenial; urgency=low

  * linux: 4.4.0-94.117 -proposed tracker (LP: #1713462)

  * mwifiex causes kernel oops when AP mode is enabled (LP: #1712746)
    - SAUCE: net/wireless: do not dereference invalid pointer
    - SAUCE: mwifiex: do not dereference invalid pointer

  * Backport more recent Broadcom bnxt_en driver (LP: #1711056)
    - SAUCE: bnxt_en_bpo: Import bnxt_en driver version 1.8.1
    - SAUCE: bnxt_en_bpo: Drop distro out-of-tree detection logic
    - SAUCE: bnxt_en_bpo: Remove unnecessary compile flags
    - SAUCE: bnxt_en_bpo: Move config settings to Kconfig
    - SAUCE: bnxt_en_bpo: Remove PCI_IDs handled by the regular driver
    - SAUCE: bnxt_en_bpo: Rename the backport driver to bnxt_en_bpo
    - bnxt_en_bpo: [Config] Enable CONFIG_BNXT_BPO=m

  * HID: multitouch: Support ALPS PTP Stick and Touchpad devices (LP: #1712481)
    - HID: multitouch: Support PTP Stick and Touchpad device
    - SAUCE: HID: multitouch: Support ALPS PTP stick with pid 0x120A

  * igb: Support using Broadcom 54616 as PHY (LP: #1712024)
    - SAUCE: igb: add support for using Broadcom 54616 as PHY

  * IPR driver causes multipath to fail paths/stuck IO on Medium Errors
    (LP: #1682644)
    - scsi: ipr: do not set DID_PASSTHROUGH on CHECK CONDITION

  * accessing /dev/hvc1 with stress-ng on Ubuntu xenial causes crash
    (LP: #1711401)
    - tty/hvc: Use IRQF_SHARED for OPAL hvc consoles

  * memory-hotplug test needs to be fixed (LP: #1710868)
    - selftests: typo correction for memory-hotplug test
    - selftests: check hot-pluggagble memory for memory-hotplug test
    - selftests: check percentage range for memory-hotplug test
    - selftests: add missing test name in memory-hotplug test
    - selftests: fix memory-hotplug test

  * HP lt4132 LTE/HSPA+ 4G Module (03f0:a31d) does not work (LP: #1707643)
    - net: cdc_mbim: apply "NDP to end" quirk to HP lt4132

  * Migrating KSM page causes the VM lock up as the KSM page merging list is too
    large (LP: #1680513)
    - ksm: introduce ksm_max_page_sharing per page deduplication limit
    - ksm: fix use after free with merge_across_nodes = 0
    - ksm: cleanup stable_node chain collapse case
    - ksm: swap the two output parameters of chain/chain_prune
    - ksm: optimize refile of stable_node_dup at the head of the chain

  * sort ABI files with C.UTF-8 locale (LP: #1712345)
    - [Packaging] sort ABI files with C.UTF-8 locale

  * Include Broadcom GPL modules in Xenial Kernel (LP: #1665783)
    - [Config] OpenNSL Kconfig/Makefile
    - Import OpenNSL v3.1.0.17
    - [Config] CONFIG_OPENNSL=y for amd64
    - OpenNSL: Enable Kconfig and build
    - SAUCE: opennsl: add proper CFLAGS

  * Xenial update to 4.4.83 stable release (LP: #1711557)
    - cpuset: fix a deadlock due to incomplete patching of cpusets_enabled()
    - mm: ratelimit PFNs busy info message
    - iscsi-target: fix memory leak in iscsit_setup_text_cmd()
    - iscsi-target: Fix iscsi_np reset hung task during parallel delete
    - fuse: initialize the flock flag in fuse_file on allocation
    - nfs/flexfiles: fix leak of nfs4_ff_ds_version arrays
    - USB: serial: option: add D-Link DWM-222 device ID
    - USB: serial: cp210x: add support for Qivicon USB ZigBee dongle
    - USB: serial: pl2303: add new ATEN device id
    - usb: musb: fix tx fifo flush handling again
    - USB: hcd: Mark secondary HCD as dead if the primary one died
    - staging:iio:resolver:ad2s1210 fix negative IIO_ANGL_VEL read
    - iio: accel: bmc150: Always restore device to normal mode after suspend-
      resume
    - iio: light: tsl2563: use correct event code
    - uas: Add US_FL_IGNORE_RESIDUE for Initio Corporation INIC-3069
    - USB: Check for dropped connection before switching to full speed
    - usb: core: unlink urbs from the tail of the endpoint's urb_list
    - usb: quirks: Add no-lpm quirk for Moshi USB to Ethernet Adapter
    - usb:xhci:Add quirk for Certain failing HP keyboard on reset after resume
    - iio: adc: vf610_adc: Fix VALT selection value for REFSEL bits
    - pnfs/blocklayout: require 64-bit sector_t
    - pinctrl: sunxi: add a missing function of A10/A20 pinctrl driver
    - pinctrl: samsung: Remove bogus irq_[un]mask from resource management
    - Linux 4.4.83

  * Xenial update to 4.4.82 stable release (LP: #1711535)
    - tcp: avoid setting cwnd to invalid ssthresh after cwnd reduction states
    - net: fix keepalive code vs TCP_FASTOPEN_CONNECT
    - bpf, s390: fix jit branch offset related to ldimm64
    - net: sched: set xt_tgchk_param par.nft_compat as 0 in ipt_init_target
    - tcp: fastopen: tcp_connect() must refresh the route
    - net: avoid skb_warn_bad_offload false positives on UFO
    - sparc64: Prevent perf from running during super critical sections
    - KVM: arm/arm64: Handle hva aging while destroying the vm
    - mm/mempool: avoid KASAN marking mempool poison checks as use-after-free
    - Linux 4.4.82

  * Xenial update to 4.4.81 stable release (LP: #1711526)
    - libata: array underflow in ata_find_dev()
    - workqueue: restore WQ_UNBOUND/max_active==1 to be ordered
    - ALSA: hda - Fix speaker output from VAIO VPCL14M1R
    - ASoC: do not close shared backend dailink
    - KVM: async_pf: make rcu irq exit if not triggered from idle task
    - mm/page_alloc: Remove kernel address exposure in free_reserved_area()
    - ext4: fix SEEK_HOLE/SEEK_DATA for blocksize < pagesize
    - ext4: fix overflow caused by missing cast in ext4_resize_fs()
    - ARM: dts: armada-38x: Fix irq type for pca955
    - media: platform: davinci: return -EINVAL for VPFE_CMD_S_CCDC_RAW_PARAMS
      ioctl
    - target: Avoid mappedlun symlink creation during lun shutdown
    - iscsi-target: Always wait for kthread_should_stop() before kthread exit
    - iscsi-target: Fix early sk_data_ready LOGIN_FLAGS_READY race
    - iscsi-target: Fix initial login PDU asynchronous socket close OOPs
    - iscsi-target: Fix delayed logout processing greater than
      SECONDS_FOR_LOGOUT_COMP
    - iser-target: Avoid isert_conn->cm_id dereference in isert_login_recv_done
    - mm, mprotect: flush TLB if potentially racing with a parallel reclaim
      leaving stale TLB entries
    - media: lirc: LIRC_GET_REC_RESOLUTION should return microseconds
    - f2fs: sanity check checkpoint segno and blkoff
    - drm: rcar-du: fix backport bug
    - saa7164: fix double fetch PCIe access condition
    - ipv4: ipv6: initialize treq->txhash in cookie_v[46]_check()
    - net: Zero terminate ifr_name in dev_ifname().
    - ipv6: avoid overflow of offset in ip6_find_1stfragopt
    - ipv4: initialize fib_trie prior to register_netdev_notifier call.
    - rtnetlink: allocate more memory for dev_set_mac_address()
    - mcs7780: Fix initialization when CONFIG_VMAP_STACK is enabled
    - openvswitch: fix potential out of bound access in parse_ct
    - packet: fix use-after-free in prb_retire_rx_blk_timer_expired()
    - ipv6: Don't increase IPSTATS_MIB_FRAGFAILS twice in ip6_fragment()
    - net: ethernet: nb8800: Handle all 4 RGMII modes identically
    - dccp: fix a memleak that dccp_ipv6 doesn't put reqsk properly
    - dccp: fix a memleak that dccp_ipv4 doesn't put reqsk properly
    - dccp: fix a memleak for dccp_feat_init err process
    - sctp: don't dereference ptr before leaving _sctp_walk_{params, errors}()
    - sctp: fix the check for _sctp_walk_params and _sctp_walk_errors
    - net/mlx5: Fix command bad flow on command entry allocation failure
    - net: phy: Correctly process PHY_HALTED in phy_stop_machine()
    - net: phy: Fix PHY unbind crash
    - xen-netback: correctly schedule rate-limited queues
    - sparc64: Measure receiver forward progress to avoid send mondo timeout
    - wext: handle NULL extra data in iwe_stream_add_point better
    - sh_eth: R8A7740 supports packet shecksumming
    - net: phy: dp83867: fix irq generation
    - tg3: Fix race condition in tg3_get_stats64().
    - x86/boot: Add missing declaration of string functions
    - phy state machine: failsafe leave invalid RUNNING state
    - scsi: qla2xxx: Get mutex lock before checking optrom_state
    - drm/virtio: fix framebuffer sparse warning
    - virtio_blk: fix panic in initialization error path
    - ARM: 8632/1: ftrace: fix syscall name matching
    - mm, slab: make sure that KMALLOC_MAX_SIZE will fit into MAX_ORDER
    - lib/Kconfig.debug: fix frv build failure
    - signal: protect SIGNAL_UNKILLABLE from unintentional clearing.
    - mm: don't dereference struct page fields of invalid pages
    - workqueue: implicit ordered attribute should be overridable
    - Linux 4.4.81

  * Xenial update to 4.4.80 stable release (LP: #1710646)
    - af_key: Add lock to key dump
    - pstore: Make spinlock per zone instead of global
    - powerpc/pseries: Fix of_node_put() underflow during reconfig remove
    - crypto: authencesn - Fix digest_null crash
    - md/raid5: add thread_group worker async_tx_issue_pending_all
    - drm/vmwgfx: Fix gcc-7.1.1 warning
    - drm/nouveau/bar/gf100: fix access to upper half of BAR2
    - KVM: PPC: Book3S HV: Context-switch EBB registers properly
    - KVM: PPC: Book3S HV: Restore critical SPRs to host values on guest exit
    - KVM: PPC: Book3S HV: Reload HTM registers explicitly
    - KVM: PPC: Book3S HV: Save/restore host values of debug registers
    - Revert "powerpc/numa: Fix percpu allocations to be NUMA aware"
    - Staging: comedi: comedi_fops: Avoid orphaned proc entry
    - drm/rcar: Nuke preclose hook
    - drm: rcar-du: Perform initialization/cleanup at probe/remove time
    - drm: rcar-du: Simplify and fix probe error handling
    - perf intel-pt: Fix ip compression
    - perf intel-pt: Fix last_ip usage
    - perf intel-pt: Use FUP always when scanning for an IP
    - perf intel-pt: Ensure never to set 'last_ip' when packet 'count' is zero
    - xfs: don't BUG() on mixed direct and mapped I/O
    - nfc: fdp: fix NULL pointer dereference
    - net: phy: Do not perform software reset for Generic PHY
    - isdn: Fix a sleep-in-atomic bug
    - isdn/i4l: fix buffer overflow
    - ath10k: fix null deref on wmi-tlv when trying spectral scan
    - wil6210: fix deadlock when using fw_no_recovery option
    - mailbox: always wait in mbox_send_message for blocking Tx mode
    - mailbox: skip complete wait event if timer expired
    - mailbox: handle empty message in tx_tick
    - mpt3sas: Don't overreach ioc->reply_post[] during initialization
    - kaweth: fix firmware download
    - kaweth: fix oops upon failed memory allocation
    - sched/cgroup: Move sched_online_group() back into css_online() to fix crash
    - PM / Domains: defer dev_pm_domain_set() until genpd->attach_dev succeeds if
      present
    - RDMA/uverbs: Fix the check for port number
    - libnvdimm, btt: fix btt_rw_page not returning errors
    - ipmi/watchdog: fix watchdog timeout set on reboot
    - v4l: s5c73m3: fix negation operator
    - pstore: Allow prz to control need for locking
    - pstore: Correctly initialize spinlock and flags
    - pstore: Use dynamic spinlock initializer
    - net: skb_needs_check() accepts CHECKSUM_NONE for tx
    - sched/cputime: Fix prev steal time accouting during CPU hotplug
    - xen/blkback: don't free be structure too early
    - xen/blkback: don't use xen_blkif_get() in xen-blkback kthread
    - tpm: fix a kernel memory leak in tpm-sysfs.c
    - tpm: Replace device number bitmap with IDR
    - x86/mce/AMD: Make the init code more robust
    - r8169: add support for RTL8168 series add-on card.
    - ARM: dts: n900: Mark eMMC slot with no-sdio and no-sd flags
    - net/mlx4: Remove BUG_ON from ICM allocation routine
    - drm/msm: Ensure that the hardware write pointer is valid
    - drm/msm: Verify that MSM_SUBMIT_BO_FLAGS are set
    - vfio-pci: use 32-bit comparisons for register address for gcc-4.5
    - irqchip/keystone: Fix "scheduling while atomic" on rt
    - ASoC: tlv320aic3x: Mark the RESET register as volatile
    - spi: dw: Make debugfs name unique between instances
    - ASoC: nau8825: fix invalid configuration in Pre-Scalar of FLL
    - irqchip/mxs: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND
    - openrisc: Add _text symbol to fix ksym build error
    - dmaengine: ioatdma: Add Skylake PCI Dev ID
    - dmaengine: ioatdma: workaround SKX ioatdma version
    - dmaengine: ti-dma-crossbar: Add some 'of_node_put()' in error path.
    - ARM64: zynqmp: Fix W=1 dtc 1.4 warnings
    - ARM64: zynqmp: Fix i2c node's compatible string
    - ARM: s3c2410_defconfig: Fix invalid values for NF_CT_PROTO_*
    - ACPI / scan: Prefer devices without _HID/_CID for _ADR matching
    - usb: gadget: Fix copy/pasted error message
    - Btrfs: adjust outstanding_extents counter properly when dio write is split
    - tools lib traceevent: Fix prev/next_prio for deadline tasks
    - xfrm: Don't use sk_family for socket policy lookups
    - perf tools: Install tools/lib/traceevent plugins with install-bin
    - perf symbols: Robustify reading of build-id from sysfs
    - video: fbdev: cobalt_lcdfb: Handle return NULL error from devm_ioremap
    - vfio-pci: Handle error from pci_iomap
    - arm64: mm: fix show_pte KERN_CONT fallout
    - nvmem: imx-ocotp: Fix wrong register size
    - sh_eth: enable RX descriptor word 0 shift on SH7734
    - ALSA: usb-audio: test EP_FLAG_RUNNING at urb completion
    - HID: ignore Petzl USB headlamp
    - scsi: fnic: Avoid sending reset to firmware when another reset is in
      progress
    - scsi: snic: Return error code on memory allocation failure
    - ASoC: dpcm: Avoid putting stream state to STOP when FE stream is paused
    - Linux 4.4.80

  * Please only recommend or suggest initramfs-tools | linux-initramfs-tool for
    kernels able to boot without initramfs (LP: #1700972)
    - [Debian] Don't depend on initramfs-tools

 -- Stefan Bader <stefan.bader@xxxxxxxxxxxxx>  Tue, 12 Sep 2017 15:40:01
+0200

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

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https://bugs.launchpad.net/bugs/1682644

Title:
  IPR driver causes multipath to fail paths/stuck IO on Medium Errors

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Zesty:
  Fix Released

Bug description:
  SRU Justification:

  Impact: stuck I/O to multipath disks with medium errors (on IPR controllers)
  Fix: upstream commit for IPR driver to allow SCSI layer to handle the error
  Testcase: perform I/O to a failing disk which is multipathed (on IPR
            controller), which returns SCSI Medium Errors (without the fix,
            the I/O gets stuck). 
            the commit message describes a test-case w/ sg_dd.

  
  ---Problem Description---
  IPR driver causes multipath to fail paths/stuck IO on Medium Errors

  This problem is resolved with this upstream accepted patch, scheduled for 4.11.
  The detailed problem description and resolution are described in the commit message.

  > scsi: ipr: do not set DID_PASSTHROUGH on CHECK CONDITION
  > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=785a470496d8e0a32e3d39f376984eb2c98ca5b3

  Please apply to 17.04 (target 16.04.3 HWE kernel) and 16.04 (GA kernel).
  Patch already applied to 17.10.

  The business justification for the SRU is:

  Clients with a dual-controller multipathed IPR configuration that
  eventually runs into failing disk/sectors, will experience an I/O hang
  once the drive reports a Medium Error, which can hang an application
  or even the root filesystem (whatever is doing I/O to the failing
  drive), potentially hanging the system.

  Thanks.

  ---Additional Hardware Info---
  Dual (IPR) controller setup, multipath enabled

  ---Steps to Reproduce---
  1) Use a disk with bad sectors (or force such condition, via internal/special tools)
  2) Multipath that disk
  3) Run IO to the multipath device on the bad sectors
  4) Both paths will be failed, and IO is stuck due to queue_if_no_path (enabled by default for IPR)

  The detailed problem description and resolution are described in the
  commit message.

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