Xenial update: 4.4.180 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:

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

Linux 4.4.180
powerpc/lib: fix book3s/32 boot failure due to code patching
powerpc/booke64: set RI in default MSR
drivers/virt/fsl_hypervisor.c: prevent integer overflow in ioctl
drivers/virt/fsl_hypervisor.c: dereferencing error pointers in ioctl
bonding: fix arp_validate toggling in active-backup mode
ipv4: Fix raw socket lookup for local traffic
vrf: sit mtu should not be updated when vrf netdev is the link
vlan: disable SIOCSHWTSTAMP in container
packet: Fix error path in packet_init
net: ucc_geth - fix Oops when changing number of buffers in the ring
bridge: Fix error path for kobject_init_and_add()
powerpc/64s: Include cpu header
USB: serial: fix unthrottle races
USB: serial: use variable for status
x86/bugs: Change L1TF mitigation string to match upstream
x86/speculation/mds: Fix documentation typo
Documentation: Correct the possible MDS sysfs values
x86/mds: Add MDSUM variant to the MDS documentation
x86/speculation/mds: Add 'mitigations=' support for MDS
x86/speculation: Support 'mitigations=' cmdline option
cpu/speculation: Add 'mitigations=' cmdline option
x86/speculation/mds: Print SMT vulnerable on MSBDS with mitigations off
x86/speculation/mds: Fix comment
x86/speculation/mds: Add SMT warning message
x86/speculation: Move arch_smt_update() call to after mitigation decisions
x86/cpu/bugs: Use __initconst for 'const' init data
Documentation: Add MDS vulnerability documentation
Documentation: Move L1TF to separate directory
x86/speculation/mds: Add mitigation mode VMWERV
x86/speculation/mds: Add sysfs reporting for MDS
x86/speculation/l1tf: Document l1tf in sysfs
x86/speculation/mds: Add mitigation control for MDS
x86/speculation/mds: Conditionally clear CPU buffers on idle entry
x86/speculation/mds: Clear CPU buffers on exit to user
x86/speculation/mds: Add mds_clear_cpu_buffers()
x86/kvm: Expose X86_FEATURE_MD_CLEAR to guests
x86/speculation/mds: Add BUG_MSBDS_ONLY
x86/speculation/mds: Add basic bug infrastructure for MDS
x86/speculation: Consolidate CPU whitelists
x86/msr-index: Cleanup bit defines
kvm: x86: Report STIBP on GET_SUPPORTED_CPUID
x86/speculation: Provide IBPB always command line options
x86/speculation: Add seccomp Spectre v2 user space protection mode
x86/speculation: Enable prctl mode for spectre_v2_user
x86/speculation: Add prctl() control for indirect branch speculation
x86/speculation: Prevent stale SPEC_CTRL msr content
x86/speculation: Prepare arch_smt_update() for PRCTL mode
x86/speculation: Split out TIF update
x86/speculation: Prepare for conditional IBPB in switch_mm()
x86/speculation: Avoid __switch_to_xtra() calls
x86/process: Consolidate and simplify switch_to_xtra() code
x86/speculation: Prepare for per task indirect branch speculation control
x86/speculation: Add command line control for indirect branch speculation
x86/speculation: Unify conditional spectre v2 print functions
x86/speculataion: Mark command line parser data __initdata
x86/speculation: Mark string arrays const correctly
x86/speculation: Reorder the spec_v2 code
x86/speculation: Rework SMT state change
sched: Add sched_smt_active()
x86/Kconfig: Select SCHED_SMT if SMP enabled
x86/speculation: Reorganize speculation control MSRs update
x86/speculation: Rename SSBD update functions
x86/speculation: Disable STIBP when enhanced IBRS is in use
x86/speculation: Move STIPB/IBPB string conditionals out of cpu_show_common()
x86/speculation: Remove unnecessary ret variable in cpu_show_common()
x86/speculation: Clean up spectre_v2_parse_cmdline()
x86/speculation: Update the TIF_SSBD comment
x86/speculation: Propagate information about RSB filling mitigation to sysfs
x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation
x86/speculation: Apply IBPB more strictly to avoid cross-process data leak
x86/mm: Use WRITE_ONCE() when setting PTEs
KVM: x86: SVM: Call x86_spec_ctrl_set_guest/host() with interrupts disabled
x86/cpu: Sanitize FAM6_ATOM naming
x86/microcode: Update the new microcode revision unconditionally
x86/microcode: Make sure boot_cpu_data.microcode is up-to-date
x86/speculation: Remove SPECTRE_V2_IBRS in enum spectre_v2_mitigation
x86/bugs: Fix the AMD SSBD usage of the SPEC_CTRL MSR
locking/atomics, asm-generic: Move some macros from <linux/bitops.h> to a new <linux/bits.h> file
x86/bugs: Switch the selection of mitigation from CPU vendor to CPU features
x86/bugs: Add AMD's SPEC_CTRL MSR usage
x86/bugs: Add AMD's variant of SSB_NO
x86/speculation: Simplify the CPU bug detection logic
x86/speculation: Support Enhanced IBRS on future CPUs
x86/cpufeatures: Hide AMD-specific speculation flags
x86/MCE: Save microcode revision in machine check records
x86/microcode/intel: Check microcode revision before updating sibling threads
bitops: avoid integer overflow in GENMASK(_ULL)
x86: stop exporting msr-index.h to userland
x86/microcode/intel: Add a helper which gives the microcode revision
locking/static_keys: Provide DECLARE and well as DEFINE macros
Don't jump to compute_result state from check_result state
x86/vdso: Pass --eh-frame-hdr to the linker
cw1200: fix missing unlock on error in cw1200_hw_scan()
gpu: ipu-v3: dp: fix CSC handling
selftests/net: correct the return value for run_netsocktests
s390: ctcm: fix ctcm_new_device error return code
ipvs: do not schedule icmp errors from tunnels
init: initialize jump labels before command line option parsing
tools lib traceevent: Fix missing equality check for strcmp
KVM: x86: avoid misreporting level-triggered irqs as edge-triggered in tracing
s390/3270: fix lockdep false positive on view->lock
s390/dasd: Fix capacity calculation for large volumes
libnvdimm/btt: Fix a kmemdup failure check
HID: input: add mapping for keyboard Brightness Up/Down/Toggle keys
HID: input: add mapping for Expose/Overview key
iio: adc: xilinx: fix potential use-after-free on remove
platform/x86: sony-laptop: Fix unintentional fall-through
netfilter: compat: initialize all fields in xt_init
timer/debug: Change /proc/timer_stats from 0644 to 0600
ASoC: Intel: avoid Oops if DMA setup fails
ipv6: fix a potential deadlock in do_ipv6_setsockopt()
UAS: fix alignment of scatter/gather segments
Bluetooth: Align minimum encryption key size for LE and BR/EDR connections
Bluetooth: hidp: fix buffer overflow
scsi: qla2xxx: Fix incorrect region-size setting in optrom SYSFS routines
usb: dwc3: Fix default lpm_nyet_threshold value
genirq: Prevent use-after-free and work list corruption
iommu/amd: Set exclusion range correctly
scsi: csiostor: fix missing data copy in csio_scsi_err_handler()
perf/x86/intel: Fix handling of wakeup_events for multi-entry PEBS
ASoC: tlv320aic32x4: Fix Common Pins
ASoC: cs4270: Set auto-increment bit for register writes
ASoC:soc-pcm:fix a codec fixup issue in TDM case
scsi: libsas: fix a race condition when smp task timeout
media: v4l2: i2c: ov7670: Fix PLL bypass register values
x86/mce: Improve error message when kernel cannot recover, p2
selinux: never allow relabeling on context mounts
Input: snvs_pwrkey - initialize necessary driver data before enabling IRQ
staging: iio: adt7316: fix the dac write calculation
staging: iio: adt7316: fix the dac read calculation
staging: iio: adt7316: allow adt751x to use internal vref for all dacs
usb: usbip: fix isoc packet num validation in get_pipe
ARM: iop: don't use using 64-bit DMA masks
ARM: orion: don't use using 64-bit DMA masks
xsysace: Fix error handling in ace_setup
hugetlbfs: fix memory leak for resv_map
net: hns: Fix WARNING when remove HNS driver with SMMU enabled
net: hns: Use NAPI_POLL_WEIGHT for hns driver
scsi: storvsc: Fix calculation of sub-channel count
vfio/pci: use correct format characters
rtc: da9063: set uie_unsupported when relevant
debugfs: fix use-after-free on symlink traversal
jffs2: fix use-after-free on symlink traversal
bonding: show full hw address in sysfs for slave entries
igb: Fix WARN_ONCE on runtime suspend
rtc: sh: Fix invalid alarm warning for non-enabled alarm
HID: debug: fix race condition with between rdesc_show() and device removal
USB: core: Fix bug caused by duplicate interface PM usage counter
USB: core: Fix unterminated string returned by usb_string()
USB: w1 ds2490: Fix bug caused by improper use of altsetting array
USB: yurex: Fix protection fault after device removal
packet: validate msg_namelen in send directly
bnxt_en: Improve multicast address setup logic.
ipv6: invert flowlabel sharing check in process and user mode
ipv6/flowlabel: wait rcu grace period before put_pid()
ipv4: ip_do_fragment: Preserve skb_iif during fragmentation
ALSA: line6: use dynamic buffers
vfio/type1: Limit DMA mappings per container
kconfig/[mn]conf: handle backspace (^H) key
libata: fix using DMA buffers on stack
scsi: zfcp: reduce flood of fcrscn1 trace records on multi-element RSCN
ceph: fix use-after-free on symlink traversal
usb: u132-hcd: fix resource leak
scsi: qla4xxx: fix a potential NULL pointer dereference
net: ethernet: ti: fix possible object reference leak
net: ibm: fix possible object reference leak
net: xilinx: fix possible object reference leak
net: ks8851: Set initial carrier state to down
net: ks8851: Delay requesting IRQ until opened
net: ks8851: Reassert reset pin if chip ID check fails
net: ks8851: Dequeue RX packets explicitly
ARM: dts: pfla02: increase phy reset duration
usb: gadget: net2272: Fix net2272_dequeue()
usb: gadget: net2280: Fix net2280_dequeue()
usb: gadget: net2280: Fix overrun of OUT messages
sc16is7xx: missing unregister/delete driver on error in sc16is7xx_init()
netfilter: bridge: set skb transport_header before entering NF_INET_PRE_ROUTING
qlcnic: Avoid potential NULL pointer dereference
usbnet: ipheth: fix potential null pointer dereference in ipheth_carrier_set
usbnet: ipheth: prevent TX queue timeouts when device not ready
Documentation: Add nospectre_v1 parameter
powerpc/fsl: Add FSL_PPC_BOOK3E as supported arch for nospectre_v2 boot arg
powerpc/fsl: Fixed warning: orphan section `__btb_flush_fixup'
powerpc/fsl: Sanitize the syscall table for NXP PowerPC 32 bit platforms
powerpc/fsl: Flush the branch predictor at each kernel entry (32 bit)
powerpc/fsl: Emulate SPRN_BUCSR register
powerpc/fsl: Flush branch predictor when entering KVM
powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used
ipv4: set the tcp_min_rtt_wlen range from 0 to one day
net: stmmac: move stmmac_check_ether_addr() to driver probe
team: fix possible recursive locking when add slaves
ipv4: add sanity checks in ipv4_link_failure()
Revert "block/loop: Use global lock for ioctl() operation."
bpf: reject wrong sized filters earlier
tipc: check link name with right length in tipc_nl_compat_link_set
tipc: check bearer name with right length in tipc_nl_compat_bearer_enable
netfilter: ebtables: CONFIG_COMPAT: drop a bogus WARN_ON
NFS: Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family.
fs/proc/proc_sysctl.c: Fix a NULL pointer dereference
intel_th: gth: Fix an off-by-one in output unassigning
slip: make slhc_free() silently accept an error pointer
tipc: handle the err returned from cmd header function
powerpc/fsl: Fix the flush of branch predictor.
powerpc/security: Fix spectre_v2 reporting
powerpc/fsl: Update Spectre v2 reporting
powerpc/fsl: Flush the branch predictor at each kernel entry (64bit)
powerpc/fsl: Add nospectre_v2 command line argument
powerpc/fsl: Fix spectre_v2 mitigations reporting
powerpc/fsl: Add macro to flush the branch predictor
powerpc/fsl: Add infrastructure to fixup branch predictor flush
powerpc: Avoid code patching freed init sections
powerpc/powernv: Query firmware for count cache flush settings
powerpc/pseries: Query hypervisor for count cache flush settings
powerpc/64s: Add support for software count cache flush
powerpc/64s: Add new security feature flags for count cache flush
powerpc/asm: Add a patch_site macro & helpers for patching instructions
powerpc/fsl: Add barrier_nospec implementation for NXP PowerPC Book3E
powerpc/64: Make meltdown reporting Book3S 64 specific
powerpc/64: Call setup_barrier_nospec() from setup_arch()
powerpc/64: Add CONFIG_PPC_BARRIER_NOSPEC
powerpc/64: Make stf barrier PPC_BOOK3S_64 specific.
powerpc/64: Disable the speculation barrier from the command line
powerpc64s: Show ori31 availability in spectre_v1 sysfs file not v2
powerpc/64s: Enhance the information in cpu_show_spectre_v1()
powerpc: Use barrier_nospec in copy_from_user()
powerpc/64: Use barrier_nospec in syscall entry
powerpc/64s: Enable barrier_nospec based on firmware settings
powerpc/64s: Patch barrier_nospec in modules
powerpc/64s: Add support for ori barrier_nospec patching
powerpc/64s: Add barrier_nospec
powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit
powerpc/64s: Fix section mismatch warnings from setup_rfi_flush()
powerpc/pseries: Restore default security feature flags on setup
powerpc: Move default security feature flags
powerpc/pseries: Fix clearing of security feature flags
powerpc/64s: Wire up cpu_show_spectre_v2()
powerpc/64s: Wire up cpu_show_spectre_v1()
powerpc/pseries: Use the security flags in pseries_setup_rfi_flush()
powerpc/powernv: Use the security flags in pnv_setup_rfi_flush()
powerpc/64s: Enhance the information in cpu_show_meltdown()
powerpc/64s: Move cpu_show_meltdown()
powerpc/powernv: Set or clear security feature flags
powerpc/pseries: Set or clear security feature flags
powerpc: Add security feature flags for Spectre/Meltdown
powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration
powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags
powerpc/rfi-flush: Differentiate enabled and patched flush types
powerpc/rfi-flush: Always enable fallback flush on pseries
powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again
powerpc/rfi-flush: Move the logic to avoid a redo into the debugfs code
powerpc/powernv: Support firmware disable of RFI flush
powerpc/pseries: Support firmware disable of RFI flush
powerpc/64s: Improve RFI L1-D cache flush fallback
powerpc/xmon: Add RFI flush related fields to paca dump
USB: Consolidate LPM checks to avoid enabling LPM twice
USB: Add new USB LPM helpers
sunrpc: don't mark uninitialised items as VALID.
nfsd: Don't release the callback slot unless it was actually held
ceph: fix ci->i_head_snapc leak
ceph: ensure d_name stability in ceph_dentry_hash()
sched/numa: Fix a possible divide-by-zero
trace: Fix preempt_enable_no_resched() abuse
MIPS: scall64-o32: Fix indirect syscall number load
cifs: do not attempt cifs operation on smb2+ rename error
KVM: fail KVM_SET_VCPU_EVENTS with invalid exception number
kbuild: simplify ld-option implementation