Xenial update: 4.4.194 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:

* bridge/mdb: remove wrong use of NLM_F_MULTI
* cdc_ether: fix rndis support for Mediatek based smartphones
* ipv6: Fix the link time qualifier of 'ping_v6_proc_exit_net()'
* isdn/capi: check message length in capi_write()
* net: Fix null de-reference of device refcount
* sch_hhf: ensure quantum and hhf_non_hh_weight are non-zero
* sctp: Fix the link time qualifier of 'sctp_ctrlsock_exit()'
* sctp: use transport pf_retrans in sctp_do_8_2_transport_strike
* tcp: fix tcp_ecn_withdraw_cwr() to clear TCP_ECN_QUEUE_CWR
* tipc: add NULL pointer check before calling kfree_rcu
* tun: fix use-after-free when register netdev failed
* Revert "MIPS: SiByte: Enable swiotlb for SWARM, LittleSur and BigSur"
* Btrfs: fix assertion failure during fsync and use of stale transaction
* genirq: Prevent NULL pointer dereference in resend_irqs()
* KVM: s390: Do not leak kernel stack data in the KVM_S390_INTERRUPT ioctl
* KVM: x86: work around leak of uninitialized stack contents
* KVM: nVMX: handle page fault in vmread
* MIPS: VDSO: Prevent use of smp_processor_id()
* MIPS: VDSO: Use same -m%-float cflag as the kernel proper
* clk: rockchip: Don't yell about bad mmc phases when getting
* driver core: Fix use-after-free and double free on glue directory
* crypto: talitos - check AES key size
* crypto: talitos - check data blocksize in ablkcipher.
* x86/build: Add -Wnoaddress-of-packed-member to REALMODE_CFLAGS, to silence GCC9 build warning
* MIPS: netlogic: xlr: Remove erroneous check in nlm_fmn_send()
* ARC: configs: Remove CONFIG_INITRAMFS_SOURCE from defconfigs
* USB: usbcore: Fix slab-out-of-bounds bug during device reset
* media: tm6000: double free if usb disconnect while streaming
* x86/boot: Add missing bootparam that breaks boot on some platforms
* xen-netfront: do not assume sk_buff_head list is empty in error handling
* KVM: coalesced_mmio: add bounds checking
* serial: sprd: correct the wrong sequence of arguments
* tty/serial: atmel: reschedule TX after RX was started
* mwifiex: Fix three heap overflow at parsing element in cfg80211_ap_settings
* s390/bpf: fix lcgr instruction encoding
* ARM: OMAP2+: Fix omap4 errata warning on other SoCs
* s390/bpf: use 32-bit index for tail calls
* NFSv4: Fix return values for nfs4_file_open()
* NFS: Fix initialisation of I/O result struct in nfs_pgio_rpcsetup
* Kconfig: Fix the reference to the IDT77105 Phy driver in the description of ATM_NICSTAR_USE_IDT77105
* ARM: 8874/1: mm: only adjust sections of valid mm structures
* r8152: Set memory to all 0xFFs on failed reg reads
* x86/apic: Fix arch_dynirq_lower_bound() bug for DT enabled machines
* netfilter: nf_conntrack_ftp: Fix debug output
* NFSv2: Fix eof handling
* NFSv2: Fix write regression
* cifs: set domainName when a domain-key is used in multiuser
* cifs: Use kzfree() to zero out the password
* sky2: Disable MSI on yet another ASUS boards (P6Xxxx)
* tools/power turbostat: fix buffer overrun
* net: seeq: Fix the function used to release some memory in an error handling path
* dmaengine: ti: omap-dma: Add cleanup in omap_dma_probe()
* keys: Fix missing null pointer check in request_key_auth_describe()
* floppy: fix usercopy direction
* media: technisat-usb2: break out of loop at end of buffer
* ARC: export "abort" for modules
* net_sched: let qdisc_put() accept NULL pointer
* Linux 4.4.194

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