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[Launchpad Bug Tracker <1494431@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux-lts-utopic -
3.16.0-52.71~14.04.1

---------------
linux-lts-utopic (3.16.0-52.71~14.04.1) trusty; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1509362

  [ Upstream Kernel Changes ]

  * Revert "net: Fix skb csum races when peeking"
    - LP: #1508510

linux-lts-utopic (3.16.0-52.70~14.04.1) trusty; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1508145
  * [Config] updateconfigs after 3.16.7-ckt18 stable update

  [ Tim Gardner ]

  * [Config] Add MMC modules sufficient for net booting
    - LP: #1502772

  [ Upstream Kernel Changes ]

  * USB: whiteheat: fix potential null-deref at probe
    - LP: #1478826
    - CVE-2015-5257
  * dcache: Handle escaped paths in prepend_path
    - LP: #1441108
    - CVE-2015-2925
  * vfs: Test for and handle paths that are unreachable from their mnt_root
    - LP: #1441108
    - CVE-2015-2925
  * hyperv: Add processing of MTU reduced by the host
    - LP: #1494431
  * hv_netvsc: Add support to set MTU reservation from guest side
    - LP: #1494431
  * hv_netvsc: Add close of RNDIS filter into change mtu call
    - LP: #1494431
  * ipv6: addrconf: validate new MTU before applying it
    - LP: #1508133
  * v4l: omap3isp: Fix sub-device power management code
    - LP: #1508133
  * rc-core: fix remove uevent generation
    - LP: #1508133
  * HID: cp2112: fix I2C_SMBUS_BYTE write
    - LP: #1508133
  * HID: cp2112: fix byte order in SMBUS operations
    - LP: #1508133
  * xtensa: fix threadptr reload on return to userspace
    - LP: #1508133
  * ARM: OMAP2+: DRA7: clockdomain: change l4per2_7xx_clkdm to SW_WKUP
    - LP: #1508133
  * mac80211: enable assoc check for mesh interfaces
    - LP: #1508133
  * PCI: Add dev_flags bit to access VPD through function 0
    - LP: #1508133
  * PCI: Add VPD function 0 quirk for Intel Ethernet devices
    - LP: #1508133
  * staging: comedi: usbduxsigma: don't clobber ai_timer in command test
    - LP: #1508133
  * staging: comedi: usbduxsigma: don't clobber ao_timer in command test
    - LP: #1508133
  * clk: exynos4: Fix wrong clock for Exynos4x12 ADC
    - LP: #1508133
  * usb: dwc3: ep0: Fix mem corruption on OUT transfers of more than 512
    bytes
    - LP: #1508133
  * Doc: ABI: testing: configfs-usb-gadget-loopback
    - LP: #1508133
  * Doc: ABI: testing: configfs-usb-gadget-sourcesink
    - LP: #1508133
  * serial: 8250_pci: Add support for Pericom PI7C9X795[1248]
    - LP: #1508133
  * KVM: MMU: fix validation of mmio page fault
    - LP: #1508133
  * auxdisplay: ks0108: fix refcount
    - LP: #1508133
  * devres: fix devres_get()
    - LP: #1508133
  * iio: adis16400: Fix adis16448 gyroscope scale
    - LP: #1508133
  * iio: Add inverse unit conversion macros
    - LP: #1508133
  * iio: adis16480: Fix scale factors
    - LP: #1508133
  * ideapad-laptop: Add Lenovo Yoga 3 14 to no_hw_rfkill dmi list
    - LP: #1508133
  * ASoC: rt5640: fix line out no sound issue
    - LP: #1508133
  * iio: industrialio-buffer: Fix iio_buffer_poll return value
    - LP: #1508133
  * iio: event: Remove negative error code from iio_event_poll
    - LP: #1508133
  * NFSv4: don't set SETATTR for O_RDONLY|O_EXCL
    - LP: #1508133
  * unshare: Unsharing a thread does not require unsharing a vm
    - LP: #1508133
  * fs: Set the size of empty dirs to 0.
    - LP: #1508133
  * x86/mce: Reenable CMCI banks when swiching back to interrupt mode
    - LP: #1508133
  * ASoC: adav80x: Remove .read_flag_mask setting from
    adav80x_regmap_config
    - LP: #1508133
  * regulator: pbias: Fix broken pbias disable functionality
    - LP: #1508133
  * serial: 8250: don't bind to SMSC IrCC IR port
    - LP: #1508133
  * serial: 8250: bind to ALi Fast Infrared Controller (ALI5123)
    - LP: #1508133
  * staging: comedi: adl_pci7x3x: fix digital output on PCI-7230
    - LP: #1508133
  * blk-mq: fix buffer overflow when reading sysfs file of 'pending'
    - LP: #1508133
  * xtensa: fix kernel register spilling
    - LP: #1508133
  * NFS: nfs_set_pgio_error sometimes misses errors
    - LP: #1508133
  * NFS: Fix a NULL pointer dereference of migration recovery ops for v4.2
    client
    - LP: #1508133
  * usb: host: ehci-sys: delete useless bus_to_hcd conversion
    - LP: #1508133
  * USB: symbolserial: Use usb_get_serial_port_data
    - LP: #1508133
  * USB: ftdi_sio: Added custom PID for CustomWare products
    - LP: #1508133
  * USB: qcserial: add HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module
    - LP: #1508133
  * igb: Fix oops caused by missing queue pairing
    - LP: #1508133
  * HID: usbhid: Fix the check for HID_RESET_PENDING in hid_io_error
    - LP: #1508133
  * eCryptfs: Invalidate dcache entries when lower i_nlink is zero
    - LP: #1508133
  * libxfs: readahead of dir3 data blocks should use the read verifier
    - LP: #1508133
  * xfs: Fix xfs_attr_leafblock definition
    - LP: #1508133
  * arm64: kconfig: Move LIST_POISON to a safe value
    - LP: #1508133
  * Btrfs: check if previous transaction aborted to avoid fs corruption
    - LP: #1508133
  * ARM: orion5x: fix legacy orion5x IRQ numbers
    - LP: #1508133
  * DRM - radeon: Don't link train DisplayPort on HPD until we get the dpcd
    - LP: #1508133
  * xfs: Fix file type directory corruption for btree directories
    - LP: #1508133
  * sched: Fix cpu_active_mask/cpu_online_mask race
    - LP: #1508133
  * rtlwifi: rtl8192cu: Add new device ID
    - LP: #1508133
  * of/address: Don't loop forever in of_find_matching_node_by_address().
    - LP: #1508133
  * drivercore: Fix unregistration path of platform devices
    - LP: #1508133
  * arm64: flush FP/SIMD state correctly after execve()
    - LP: #1508133
  * xfs: return errors from partial I/O failures to files
    - LP: #1508133
  * ALSA: usb-audio: correct the value cache check.
    - LP: #1508133
  * IB/qib: Change lkey table allocation to support more MRs
    - LP: #1508133
  * drm/radeon/atom: Send out the full AUX address
    - LP: #1508133
  * tg3: Fix temperature reporting
    - LP: #1508133
  * drm/i915: Always mark the object as dirty when used by the GPU
    - LP: #1508133
  * Add radeon suspend/resume quirk for HP Compaq dc5750.
    - LP: #1508133
  * IB/uverbs: reject invalid or unknown opcodes
    - LP: #1508133
  * hpfs: update ctime and mtime on directory modification
    - LP: #1508133
  * Input: evdev - do not report errors form flush()
    - LP: #1508133
  * crypto: ghash-clmulni: specify context size for ghash async algorithm
    - LP: #1508133
  * mm: check if section present during memory block registering
    - LP: #1508133
  * fs: create and use seq_show_option for escaping
    - LP: #1508133
  * ALSA: hda - Enable headphone jack detect on old Fujitsu laptops
    - LP: #1508133
  * ALSA: hda - Use ALC880_FIXUP_FUJITSU for FSC Amilo M1437
    - LP: #1508133
  * rtc: s5m: fix to update ctrl register
    - LP: #1508133
  * scsi: fix scsi_error_handler vs. scsi_host_dev_release race
    - LP: #1508133
  * parisc: Use double word condition in 64bit CAS operation
    - LP: #1508133
  * vmscan: fix increasing nr_isolated incurred by putback unevictable
    pages
    - LP: #1508133
  * drm/i915: Limit the number of loops for reading a split 64bit register
    - LP: #1508133
  * hfs,hfsplus: cache pages correctly between bnode_create and bnode_free
    - LP: #1508133
  * hfs: fix B-tree corruption after insertion at position 0
    - LP: #1508133
  * drm/qxl: validate monitors config modes
    - LP: #1508133
  * PCI: Fix TI816X class code quirk
    - LP: #1508133
  * Input: ambakmi - fix system PM by converting to modern callbacks
    - LP: #1508133
  * svcrdma: Fix send_reply() scatter/gather set-up
    - LP: #1508133
  * x86/mm: Initialize pmd_idx in page_table_range_init_count()
    - LP: #1508133
  * net: bcmgenet: Use correct dev_id for free_irq
    - LP: #1508133
  * powerpc/rtas: Introduce rtas_get_sensor_fast() for IRQ handlers
    - LP: #1508133
  * clk: versatile: off by one in clk_sp810_timerclken_of_get()
    - LP: #1508133
  * usb: gadget: m66592-udc: forever loop in set_feature()
    - LP: #1508133
  * windfarm: decrement client count when unregistering
    - LP: #1508133
  * perf hists: Update the column width for the "srcline" sort key
    - LP: #1508133
  * batman-adv: Make DAT capability changes atomic
    - LP: #1508133
  * batman-adv: Make NC capability changes atomic
    - LP: #1508133
  * batman-adv: Make TT capability changes atomic
    - LP: #1508133
  * batman-adv: fix multicast counter when purging originators
    - LP: #1508133
  * batman-adv: fix counter for multicast supporting nodes
    - LP: #1508133
  * batman-adv: Make MCAST capability changes atomic
    - LP: #1508133
  * batman-adv: Fix potential synchronization issues in mcast tvlv handler
    - LP: #1508133
  * batman-adv: Fix potentially broken skb network header access
    - LP: #1508133
  * net: fix endian check warning in etherdevice.h
    - LP: #1508133
  * powerpc/mm: Fix pte_pagesize_index() crash on 4K w/64K hash
    - LP: #1508133
  * mtd: pxa3xx_nand: add a default chunk size
    - LP: #1508133
  * ath10k: fix dma_mapping_error() handling
    - LP: #1508133
  * mmc: sdhci: also get preset value and driver type for MMC_DDR52
    - LP: #1508133
  * perf stat: Get correct cpu id for print_aggr
    - LP: #1508133
  * ASoC: spear_pcm: Use devm_snd_dmaengine_pcm_register to fix resource
    leak
    - LP: #1508133
  * IB/mlx4: Fix potential deadlock when sending mad to wire
    - LP: #1508133
  * IB/mlx4: Forbid using sysfs to change RoCE pkeys
    - LP: #1508133
  * IB/mlx4: Use correct SL on AH query under RoCE
    - LP: #1508133
  * IB/uverbs: Fix race between ib_uverbs_open and remove_one
    - LP: #1508133
  * mmc: core: fix race condition in mmc_wait_data_done
    - LP: #1508133
  * ipv6: fix exthdrs offload registration in out_rt path
    - LP: #1508133
  * task_work: remove fifo ordering guarantee
    - LP: #1508133
  * fixed_phy: pass 'irq' to fixed_phy_add()
    - LP: #1508133
  * netlink, mmap: fix edge-case leakages in nf queue zero-copy
    - LP: #1508133
  * scsi_dh: fix randconfig build error
    - LP: #1508133
  * md: flush ->event_work before stopping array.
    - LP: #1508133
  * md/raid10: always set reshape_safe when initializing reshape_position.
    - LP: #1508133
  * perf/x86: Fix copy_from_user_nmi() return if range is not ok
    - LP: #1508133
  * ext4: fix loss of delalloc extent info in ext4_zero_range()
    - LP: #1508133
  * powerpc/MSI: Fix race condition in tearing down MSI interrupts
    - LP: #1508133
  * UBI: block: Add missing cache flushes
    - LP: #1508133
  * usbnet: Get EVENT_NO_RUNTIME_PM bit before it is cleared
    - LP: #1508133
  * net/ipv6: Correct PIM6 mrt_lock handling
    - LP: #1508133
  * netlink, mmap: transform mmap skb into full skb on taps
    - LP: #1508133
  * sctp: fix race on protocol/netns initialization
    - LP: #1508133
  * openvswitch: Zero flows on allocation.
    - LP: #1508133
  * fib_rules: fix fib rule dumps across multiple skbs
    - LP: #1508133
  * parisc: Filter out spurious interrupts in PA-RISC irq handler
    - LP: #1508133
  * Linux 3.16.7-ckt18
    - LP: #1508133

 -- Luis Henriques <luis.henriques@xxxxxxxxxxxxx>  Fri, 23 Oct 2015
12:21:56 +0100

** Changed in: linux-lts-utopic (Ubuntu)
       Status: Invalid => Fix Released

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

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-lts-utopic in Ubuntu.
https://bugs.launchpad.net/bugs/1494431

Title:
  [Hyper-V] netvsc support to set MTU reservation from guest

Status in linux package in Ubuntu:
  Fix Released
Status in linux-lts-trusty package in Ubuntu:
  Won't Fix
Status in linux-lts-utopic package in Ubuntu:
  Fix Released
Status in linux source package in Precise:
  Invalid
Status in linux-lts-trusty source package in Precise:
  Won't Fix
Status in linux-lts-utopic source package in Precise:
  In Progress
Status in linux source package in Trusty:
  Won't Fix
Status in linux source package in Vivid:
  Fix Released
Status in linux source package in Wily:
  Fix Released

Bug description:
  Please incorporate the following upstream commits (and necessary pre-
  requisites )to the 4.2 kernel into 15.10, 15.04, 14.04 (including
  HWE), and 12.04 (including HWE). Network throughput is improved with
  proper setting of MTU in virtualized environments.

  hv_netvsc: Add support to set MTU reservation from guest side
  When packet encapsulation is in use, the MTU needs to be reduced for
  headroom reservation.
  The existing code takes the updated MTU value only from the host side.
  But vSwitch extensions, such as Open vSwitch, require the flexibility
  to change the MTU to different values from within a guest during the
  lifecycle of a vNIC, when the encapsulation protocol is changed. The
  patch supports this kind of MTU changes.

  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9cbce34c34bcc05ea0dd78c8999bfe88b5b6b86

  hv_netvsc: Add close of RNDIS filter into change mtu call
  The current change mtu call only stops tx before removing RNDIS filter.
  In case ringbufer is not empty, the rndis_filter_device_remove() may
  hang on removing the buffers.

  This patch adds close of RNDIS filter before removing it, also a
  gradual waiting loop until the ring is empty. The change_mtu hang
  issue under heavy traffic is solved by this patch.

  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2de8530ba0c71a2fba02590681af0f3a2a187a9b

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