Xenial update: v4.4.262 upstream stable release

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 following upstream
       stable patches should be included in the Ubuntu kernel:

       v4.4.262 upstream stable release
       from git://git.kernel.org/

uapi: nfnetlink_cthelper.h: fix userspace compilation error
ath9k: fix transmitting to stations in dynamic SMPS mode
net: Fix gro aggregation for udp encaps with zero csum
can: skb: can_skb_set_owner(): fix ref counting if socket was closed before setting skb ownership
can: flexcan: assert FRZ bit in flexcan_chip_freeze()
can: flexcan: enable RX FIFO after FRZ/HALT valid
netfilter: x_tables: gpf inside xt_find_revision()
cifs: return proper error code in statfs(2)
floppy: fix lock_fdc() signal handling
Revert "mm, slub: consider rest of partial list if acquire_slab() fails"
futex: Change locking rules
futex: Cure exit race
futex: fix dead code in attach_to_pi_owner()
net/mlx4_en: update moderation when config reset
net: lapbether: Remove netif_start_queue / netif_stop_queue
net: davicom: Fix regulator not turned off on failed probe
net: davicom: Fix regulator not turned off on driver removal
media: usbtv: Fix deadlock on suspend
mmc: mxs-mmc: Fix a resource leak in an error handling path in 'mxs_mmc_probe()'
mmc: mediatek: fix race condition between msdc_request_timeout and irq
powerpc/perf: Record counter overflow always if SAMPLE_IP is unset
PCI: xgene-msi: Fix race in installing chained irq handler
s390/smp: __smp_rescan_cpus() - move cpumask away from stack
scsi: libiscsi: Fix iscsi_prep_scsi_cmd_pdu() error handling
ALSA: hda/hdmi: Cancel pending works before suspend
ALSA: hda: Avoid spurious unsol event handling during S3/S4
ALSA: usb-audio: Fix "cannot get freq eq" errors on Dell AE515 sound bar
s390/dasd: fix hanging DASD driver unbind
mmc: core: Fix partition switch time for eMMC
scripts/recordmcount.{c,pl}: support -ffunction-sections .text.* section names
libertas: fix a potential NULL pointer dereference
Goodix Fingerprint device is not a modem
usb: gadget: f_uac2: always increase endpoint max_packet_size by one audio slot
usb: renesas_usbhs: Clear PIPECFG for re-enabling pipe with other EPNUM
xhci: Improve detection of device initiated wake signal.
USB: serial: io_edgeport: fix memory leak in edge_startup
USB: serial: ch341: add new Product ID
USB: serial: cp210x: add ID for Acuity Brands nLight Air Adapter
USB: serial: cp210x: add some more GE USB IDs
usbip: fix stub_dev to check for stream socket
usbip: fix vhci_hcd to check for stream socket
usbip: fix stub_dev usbip_sockfd_store() races leading to gpf
staging: rtl8192u: fix ->ssid overflow in r8192_wx_set_scan()
staging: rtl8188eu: prevent ->ssid overflow in rtw_wx_set_scan()
staging: rtl8712: unterminated string leads to read overflow
staging: rtl8188eu: fix potential memory corruption in rtw_check_beacon_data()
staging: rtl8712: Fix possible buffer overflow in r8712_sitesurvey_cmd
staging: rtl8192e: Fix possible buffer overflow in _rtl92e_wx_set_scan
staging: comedi: addi_apci_1032: Fix endian problem for COS sample
staging: comedi: addi_apci_1500: Fix endian problem for command sample
staging: comedi: adv_pci1710: Fix endian problem for AI command data
staging: comedi: das6402: Fix endian problem for AI command data
staging: comedi: das800: Fix endian problem for AI command data
staging: comedi: dmm32at: Fix endian problem for AI command data
staging: comedi: me4000: Fix endian problem for AI command data
staging: comedi: pcl711: Fix endian problem for AI command data
staging: comedi: pcl818: Fix endian problem for AI command data
NFSv4.2: fix return value of _nfs4_get_security_label()
block: rsxx: fix error return code of rsxx_pci_probe()
alpha: add $(src)/ rather than $(obj)/ to make source file path
alpha: merge build rules of division routines
alpha: make short build log available for division routines
alpha: Package string routines together
alpha: move exports to actual definitions
alpha: get rid of tail-zeroing in __copy_user()
alpha: switch __copy_user() and __do_clean_user() to normal calling conventions
powerpc/64s: Fix instruction encoding for lis in ppc_function_entry()
media: hdpvr: Fix an error handling path in hdpvr_probe()
KVM: arm64: Fix exclusive limit for IPA size
iio: imu: adis16400: fix memory leak
xen/events: reset affinity of 2-level event when tearing it down
xen/events: don't unmask an event channel when an eoi is pending
xen/events: avoid handling the same event on two cpus at the same time
Linux 4.4.262
UBUNTU: upstream stable to v4.4.262