Xenial update to v4.4.38 stable release

[Tim Gardner]

SRU Justification

    Impact:
       The upstream process for stable tree updates is quite similar
       in scope to the Ubuntu SRU process, e.g., each patch has to
       demonstrably fix a bug, and each patch is vetted by upstream
       by originating either directly from a mainline/stable Linux tree or
       a minimally backported form of that patch. The v4.4.38 upstream stable
       patch set is now available. It should be included in the Ubuntu
       kernel as well.

       git://git.kernel.org/

    TEST CASE: TBD

       The following patches from the v4.4.38 stable release shall be applied:

virtio-net: add a missing synchronize_net()
net: check dead netns for peernet2id_alloc()
ip6_tunnel: disable caching when the traffic class is inherited
net: sky2: Fix shutdown crash
af_unix: conditionally use freezable blocking calls in read
rtnetlink: fix FDB size computation
l2tp: fix racy SOCK_ZAPPED flag check in l2tp_ip{,6}_bind()
net: dsa: bcm_sf2: Ensure we re-negotiate EEE during after link change
net, sched: respect rcu grace period on cls destruction
net/sched: pedit: make sure that offset is valid
netlink: Call cb->done from a worker thread
netlink: Do not schedule work from sk_destruct
net/dccp: fix use-after-free in dccp_invalid_packet
net: bcmgenet: Utilize correct struct device for all DMA operations
sh_eth: remove unchecked interrupts for RZ/A1
geneve: avoid use-after-free of skb->data
net: ping: check minimum size on ICMP header length
sparc32: Fix inverted invalid_frame_pointer checks on sigreturns
sparc64: Fix find_node warning if numa node cannot be found
sparc64: fix compile warning section mismatch in find_node()
constify iov_iter_count() and iter_is_iovec()
Don't feed anything but regular iovec's to blk_rq_map_user_iov
ipv6: Set skb->protocol properly for local output
ipv4: Set skb->protocol properly for local output
esp4: Fix integrity verification when ESN are used
esp6: Fix integrity verification when ESN are used
Linux 4.4.38

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-62.83

---------------
linux (4.4.0-62.83) xenial; urgency=low

  [ Thadeu Lima de Souza Cascardo ]

  * Release Tracking Bug
    - LP: #1657430

  * Backport DP MST fixes to i915 (LP: #1657353)
    - SAUCE: i915_bpo: Fix DP link rate math
    - SAUCE: i915_bpo: Validate mode against max. link data rate for DP MST

  * Ubuntu xenial - 4.4.0-59-generic i3 I/O performance issue (LP: #1657281)
    - blk-mq: really fix plug list flushing for nomerge queues

linux (4.4.0-61.82) xenial; urgency=low

  [ Thadeu Lima de Souza Cascardo ]

  * Release Tracking Bug
    - LP: #1656810

  * Xen MSI setup code incorrectly re-uses cached pirq (LP: #1656381)
    - SAUCE: xen: do not re-use pirq number cached in pci device msi msg data

  * nvme drive probe failure (LP: #1626894)
    - nvme: revert NVMe: only setup MSIX once

linux (4.4.0-60.81) xenial; urgency=low

  [ John Donnelly ]

  * Release Tracking Bug
    - LP: #1656084

  * Couldn't emulate instruction 0x7813427c (LP: #1634129)
    - KVM: PPC: Book3S PR: Fix illegal opcode emulation

  * perf: 24x7: Eliminate domain name suffix in event names (LP: #1560482)
    - powerpc/perf/hv-24x7: Fix usage with chip events.
    - powerpc/perf/hv-24x7: Display change in counter values
    - powerpc/perf/hv-24x7: Display domain indices in sysfs
    - powerpc/perf/24x7: Eliminate domain suffix in event names

  * 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

  * VMX module autoloading if available (LP: #1651322)
    - powerpc: Add module autoloading based on CPU features
    - crypto: vmx - Convert to CPU feature based module autoloading

  * ACPI probe support for AD5592/3 configurable multi-channel converter
    (LP: #1654497)
    - SAUCE: iio: dac: ad5592r: Add ACPI support
    - SAUCE: iio: dac: ad5593r: Add ACPI support

  * Xenial update to v4.4.40 stable release (LP: #1654602)
    - btrfs: limit async_work allocation and worker func duration
    - Btrfs: fix tree search logic when replaying directory entry deletes
    - btrfs: store and load values of stripes_min/stripes_max in balance status
      item
    - 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: hub: Fix auto-remount of safely removed or ejected USB-3 devices
    - 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
    - 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: hd...