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[Launchpad Bug Tracker <1663687@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.8.0-40.43

---------------
linux (4.8.0-40.43) yakkety; urgency=low

  * linux: 4.8.0-40.43 -proposed tracker (LP: #1667066)

  [ Andy Whitcroft ]
  * NFS client : permission denied when trying to access subshare, since kernel
    4.4.0-31 (LP: #1649292)
    - fs: Better permission checking for submounts

  * shaking screen  (LP: #1651981)
    - drm/radeon: drop verde dpm quirks

  * [0bda:0328] Card reader failed after S3 (LP: #1664809)
    - usb: hub: Wait for connection to be reestablished after port reset

  * linux-lts-xenial 4.4.0-63.84~14.04.2 ADT test failure with linux-lts-xenial
    4.4.0-63.84~14.04.2 (LP: #1664912)
    - SAUCE: apparmor: fix link auditing failure due to, uninitialized var

  * In Ubuntu 17.04 : after reboot getting message in console like Unable to
    open file: /etc/keys/x509_ima.der (-2) (LP: #1656908)
    - SAUCE: ima: Downgrade error to warning

  * 16.04.2: Extra patches for POWER9 (LP: #1664564)
    - powerpc/mm: Fix no execute fault handling on pre-POWER5
    - powerpc/mm: Fix spurrious segfaults on radix with autonuma

  * ibmvscsis: Add SGL LIMIT (LP: #1662551)
    - ibmvscsis: Add SGL limit

  * [Hyper-V] Bug fixes for storvsc (tagged queuing, error conditions)
    (LP: #1663687)
    - scsi: storvsc: Enable tracking of queue depth
    - scsi: storvsc: Remove the restriction on max segment size
    - scsi: storvsc: Enable multi-queue support
    - scsi: storvsc: use tagged SRB requests if supported by the device
    - scsi: storvsc: properly handle SRB_ERROR when sense message is present
    - scsi: storvsc: properly set residual data length on errors

  * Ubuntu16.10-KVM:Big configuration with multiple guests running SRIOV VFs
    caused KVM host hung and all KVM guests down. (LP: #1651248)
    - KVM: PPC: Book 3S: XICS cleanup: remove XICS_RM_REJECT
    - KVM: PPC: Book 3S: XICS: correct the real mode ICP rejecting counter
    - KVM: PPC: Book 3S: XICS: Fix potential issue with duplicate IRQ resends
    - KVM: PPC: Book 3S: XICS: Implement ICS P/Q states
    - KVM: PPC: Book 3S: XICS: Don't lock twice when checking for resend

  * ISST-LTE:pNV: ppc64_cpu command is hung w HDs, SSDs and NVMe (LP: #1662666)
    - blk-mq: Avoid memory reclaim when remapping queues
    - blk-mq: Fix failed allocation path when mapping queues
    - blk-mq: Always schedule hctx->next_cpu

  * systemd-udevd hung in blk_mq_freeze_queue_wait testing unpartitioned NVMe
    drive (LP: #1662673)
    - percpu-refcount: fix reference leak during percpu-atomic transition

  * [Yakkety SRU] Enable KEXEC support in ARM64 kernel (LP: #1662554)
    - [Config] Enable KEXEC support in ARM64.

  * [Hyper-V] Fix ring buffer handling to avoid host throttling (LP: #1661430)
    - Drivers: hv: vmbus: On write cleanup the logic to interrupt the host
    - Drivers: hv: vmbus: On the read path cleanup the logic to interrupt the host
    - Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()

  * brd module compiled as built-in (LP: #1593293)
    - CONFIG_BLK_DEV_RAM=m

  * regession tests failing after stackprofile test is run (LP: #1661030)
    - SAUCE: fix regression with domain change in complain mode

  * Permission denied and inconsistent behavior in complain mode with 'ip netns
    list' command (LP: #1648903)
    - SAUCE: fix regression with domain change in complain mode

  * flock not mediated by 'k' (LP: #1658219)
    - SAUCE: apparmor: flock mediation is not being enforced on cache check

  * unexpected errno=13 and disconnected path when trying to open /proc/1/ns/mnt
    from a unshared mount namespace (LP: #1656121)
    - SAUCE: apparmor: null profiles should inherit parent control flags

  * apparmor refcount leak of profile namespace when removing profiles
    (LP: #1660849)
    - SAUCE: apparmor: fix ns ref count link when removing profiles from policy

  * tor in lxd: apparmor="DENIED" operation="change_onexec"
    namespace="root//CONTAINERNAME_<var-lib-lxd>" profile="unconfined"
    name="system_tor" (LP: #1648143)
    - SAUCE: apparmor: Fix no_new_privs blocking change_onexec when using stacked
      namespaces

  * apparmor_parser hangs indefinitely when called by multiple threads
    (LP: #1645037)
    - SAUCE: apparmor: fix lock ordering for mkdir

  * apparmor leaking securityfs pin count (LP: #1660846)
    - SAUCE: apparmor: fix leak on securityfs pin count

  * apparmor reference count leak when securityfs_setup_d_inode\ () fails
    (LP: #1660845)
    - SAUCE: apparmor: fix reference count leak when securityfs_setup_d_inode()
      fails

  * apparmor not checking error if security_pin_fs() fails (LP: #1660842)
    - SAUCE: apparmor: fix not handling error case when securityfs_pin_fs() fails

  * apparmor oops in bind_mnt when dev_path lookup fails (LP: #1660840)
    - SAUCE: apparmor: fix oops in bind_mnt when dev_path lookup fails

  * apparmor  auditing denied access of special apparmor .null fi\ le
    (LP: #1660836)
    - SAUCE: apparmor: Don't audit denied access of special apparmor .null file

  * apparmor label leak when new label is unused (LP: #1660834)
    - SAUCE: apparmor: fix label leak when new label is unused

  * apparmor reference count bug in label_merge_insert() (LP: #1660833)
    - SAUCE: apparmor: fix reference count bug in label_merge_insert()

  * apparmor's raw_data file in securityfs is sometimes truncated (LP: #1638996)
    - SAUCE: apparmor: fix replacement race in reading rawdata

  * unix domain socket cross permission check failing with nested namespaces
    (LP: #1660832)
    - SAUCE: apparmor: fix cross ns perm of unix domain sockets

  * Enable CONFIG_NET_DROP_MONITOR=m in Ubuntu Kernel (LP: #1660634)
    - [Config] CONFIG_NET_DROP_MONITOR=m

  * Linux kernel 4.8 hangs at boot up (LP: #1659340)
    - SAUCE: x86/efi: Always map first physical page into EFI pagetables

  * s390/kconfig: CONFIG_NUMA without CONFIG_NUMA_EMU does not make any sense on
    s390x (LP: #1557690)
    - [Config] CONFIG_NUMA_BALANCING=y
    - [Config] CONFIG_NUMA=y, CONFIG_NUMA_EMU=y for s390x

 -- Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>  Wed, 22 Feb
2017 15:03:35 -0300

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

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

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https://bugs.launchpad.net/bugs/1663687

Title:
  [Hyper-V] Bug fixes for storvsc (tagged queuing, error conditions)

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

Bug description:
  Patchset:

  1/6 Enable tracking of queue depth.

  2/6 Remove the artificially imposed restriction on max segment size.

  3/6 Enable multi-q support. We will allocate the outgoing channel using
  the following policy:

          1. We will make every effort to pick a channel that is in the
             same NUMA node that is initiating the I/O
          2. The mapping between the guest CPU and the outgoing channel
             is persistent.

  4/6 Properly set SRB flags when hosting device supports tagged queuing.
  This patch improves the performance on Fiber Channel disks.

  5/6 When sense message is present on error, we should pass along to the upper
  layer to decide how to deal with the error.
  This patch fixes connectivity issues with Fiber Channel devices.

  6/6 On I/O errors, the Windows driver doesn't set data_transfer_length
  on error conditions other than SRB_STATUS_DATA_OVERRUN.
  In these cases we need to set data_transfer_length to 0,
  indicating there is no data transferred. On SRB_STATUS_DATA_OVERRUN,
  data_transfer_length is set by the Windows driver to the actual data transferred.

  The new feature (multi-q) in this patchset require boot line
  parameters to enable so they are safe to integrate.

  K. Y. Srinivasan (3):
    storvsc: Enable tracking of queue depth
    storvsc: Remove the restriction on max segment size
    storvsc: Enable multi-queue support

  Long Li (3):
    storvsc: use tagged SRB requests if supported by the device
    storvsc: properly handle SRB_ERROR when sense message is present
    storvsc: properly set residual data length on errors

  https://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/?id=40630f462824ee24bc00d692865c86c3828094e0

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