Xenial update: 4.4.197 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:

* KVM: s390: Test for bad access register and size at the start of S390_MEM_OP
* s390/topology: avoid firing events before kobjs are created
* s390/cio: avoid calling strlen on null pointer
* s390/cio: exclude subchannels with no parent from pseudo check
* KVM: nVMX: handle page fault in vmread fix
* ASoC: Define a set of DAPM pre/post-up events
* powerpc/powernv: Restrict OPAL symbol map to only be readable by root
* can: mcp251x: mcp251x_hw_reset(): allow more time after a reset
* crypto: qat - Silence smp_processor_id() warning
* ieee802154: atusb: fix use-after-free at disconnect
* cfg80211: initialize on-stack chandefs
* ima: always return negative code for error
* fs: nfs: Fix possible null-pointer dereferences in encode_attrs()
* 9p: avoid attaching writeback_fid on mmap with type PRIVATE
* xen/pci: reserve MCFG areas earlier
* ceph: fix directories inode i_blkbits initialization
* drm/amdgpu: Check for valid number of registers to read
* thermal: Fix use-after-free when unregistering thermal zone device
* fuse: fix memleak in cuse_channel_open
* kernel/elfcore.c: include proper prototypes
* tools lib traceevent: Do not free tep->cmdlines in add_new_comm() on failure
* perf stat: Fix a segmentation fault when using repeat forever
* crypto: caam - fix concurrency issue in givencrypt descriptor
* cfg80211: add and use strongly typed element iteration macros
* cfg80211: Use const more consistently in for_each_element macros
* nl80211: validate beacon head
* ASoC: sgtl5000: Improve VAG power and mute control
* panic: ensure preemption is disabled during panic()
* UBUNTU: [Config] updateconfigs for USB_RIO500
* USB: rio500: Remove Rio 500 kernel driver
* USB: yurex: Don't retry on unexpected errors
* USB: yurex: fix NULL-derefs on disconnect
* USB: usb-skeleton: fix runtime PM after driver unbind
* USB: usb-skeleton: fix NULL-deref on disconnect
* xhci: Prevent device initiated U1/U2 link pm if exit latency is too long
* xhci: Check all endpoints for LPM timeout
* usb: xhci: wait for CNR controller not ready bit in xhci resume
* xhci: Increase STS_SAVE timeout in xhci_suspend()
* USB: adutux: remove redundant variable minor
* USB: adutux: fix use-after-free on disconnect
* USB: adutux: fix NULL-derefs on disconnect
* USB: adutux: fix use-after-free on release
* USB: iowarrior: fix use-after-free on disconnect
* USB: iowarrior: fix use-after-free on release
* USB: iowarrior: fix use-after-free after driver unbind
* USB: usblp: fix runtime PM after driver unbind
* USB: chaoskey: fix use-after-free on release
* USB: ldusb: fix NULL-derefs on driver unbind
* serial: uartlite: fix exit path null pointer
* USB: serial: keyspan: fix NULL-derefs on open() and write()
* USB: serial: ftdi_sio: add device IDs for Sienna and Echelon PL-20
* USB: serial: option: add Telit FN980 compositions
* USB: serial: option: add support for Cinterion CLS8 devices
* USB: serial: fix runtime PM after driver unbind
* USB: usblcd: fix I/O after disconnect
* USB: microtek: fix info-leak at probe
* USB: dummy-hcd: fix power budget for SuperSpeed mode
* usb: renesas_usbhs: gadget: Do not discard queues in usb_ep_set_{halt,wedge}()
* usb: renesas_usbhs: gadget: Fix usb_ep_set_{halt,wedge}() behavior
* USB: legousbtower: fix slab info leak at probe
* USB: legousbtower: fix deadlock on disconnect
* USB: legousbtower: fix potential NULL-deref on disconnect
* USB: legousbtower: fix open after failed reset request
* USB: legousbtower: fix use-after-free on release
* staging: vt6655: Fix memory leak in vt6655_probe
* iio: adc: ad799x: fix probe error handling
* iio: light: opt3001: fix mutex unlock race
* perf llvm: Don't access out-of-scope array
* CIFS: Gracefully handle QueryInfo errors during open
* CIFS: Force reval dentry if LOOKUP_REVAL flag is set
* kernel/sysctl.c: do not override max_threads provided by userspace
* arm64: capabilities: Handle sign of the feature bit
* arm64: Rename cpuid_feature field extract routines
* Staging: fbtft: fix memory leak in fbtft_framebuffer_alloc
* cifs: Check uniqueid for SMB2+ and return -ESTALE if necessary
* CIFS: Force revalidate inode when dentry is stale
* media: stkwebcam: fix runtime PM after driver unbind
* tracing: Get trace_array reference for available_tracers files
* x86/asm: Fix MWAITX C-state hint value
* Linux 4.4.197

       4.4.197 upstream stable release
       from git://git.kernel.org/