Bionic update: upstream stable patchset 2021-03-09

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:

       upstream stable patchset 2021-03-09

                Ported from the following upstream stable releases:
                        v4.14.219, v4.19.173,
                        v4.14.220, v4.19.174,
                        v4.14.221, v4.19.175,
                                   v4.19.176

       from git://git.kernel.org/

ACPI: sysfs: Prefer "compatible" modalias
ARM: dts: imx6qdl-gw52xx: fix duplicate regulator naming
wext: fix NULL-ptr-dereference with cfg80211's lack of commit()
net: usb: qmi_wwan: added support for Thales Cinterion PLSx3 modem family
drivers: soc: atmel: Avoid calling at91_soc_init on non AT91 SoCs
drivers: soc: atmel: add null entry at the end of at91_soc_allowed_list[]
KVM: x86/pmu: Fix HW_REF_CPU_CYCLES event pseudo-encoding in intel_arch_events[]
KVM: x86: get smi pending status correctly
xen: Fix XenStore initialisation for XS_LOCAL
leds: trigger: fix potential deadlock with libata
mt7601u: fix kernel crash unplugging the device
mt7601u: fix rx buffer refcounting
xen-blkfront: allow discard-* nodes to be optional
ARM: imx: build suspend-imx6.S with arm instruction set
netfilter: nft_dynset: add timeout extension to template
xfrm: Fix oops in xfrm_replay_advance_bmp
RDMA/cxgb4: Fix the reported max_recv_sge value
iwlwifi: pcie: use jiffies for memory read spin time limit
iwlwifi: pcie: reschedule in long-running memory reads
mac80211: pause TX while changing interface type
can: dev: prevent potential information leak in can_fill_info()
x86/entry/64/compat: Preserve r8-r11 in int $0x80
x86/entry/64/compat: Fix "x86/entry/64/compat: Preserve r8-r11 in int $0x80"
iommu/vt-d: Gracefully handle DMAR units with no supported address widths
iommu/vt-d: Don't dereference iommu_device if IOMMU_API is not built
NFC: fix resource leak when target index is invalid
NFC: fix possible resource leak
team: protect features update by RCU to avoid deadlock
tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN
kernel: kexec: remove the lock operation of system_transition_mutex
PM: hibernate: flush swap writer after marking
pNFS/NFSv4: Fix a layout segment leak in pnfs_layout_process()
net/mlx5: Fix memory leak on flow table creation error flow
rxrpc: Fix memory leak in rxrpc_lookup_local
UBUNTU: upstream stable to v4.14.219, v4.19.173
net: dsa: bcm_sf2: put device node before return
ibmvnic: Ensure that CRQ entry read are correctly ordered
ACPI: thermal: Do not call acpi_thermal_check() directly
net_sched: gen_estimator: support large ewma log
phy: cpcap-usb: Fix warning for missing regulator_disable
x86: __always_inline __{rd,wr}msr()
scsi: scsi_transport_srp: Don't block target in failfast state
scsi: libfc: Avoid invoking response handler twice if ep is already completed
mac80211: fix fast-rx encryption check
scsi: ibmvfc: Set default timeout to avoid crash during migration
objtool: Don't fail on missing symbol table
kthread: Extract KTHREAD_IS_PER_CPU
workqueue: Restrict affinity change to rescuer
UBUNTU: upstream stable to v4.14.220, v4.19.174
USB: serial: cp210x: add pid/vid for WSDA-200-USB
USB: serial: cp210x: add new VID/PID for supporting Teraoka AD2000
USB: serial: option: Adding support for Cinterion MV31
arm64: dts: ls1046a: fix dcfg address range
net: lapb: Copy the skb before sending a packet
elfcore: fix building with clang
USB: gadget: legacy: fix an error code in eth_bind()
USB: usblp: don't call usb_set_interface if there's a single alt
usb: dwc2: Fix endpoint direction check in ep_from_windex
ovl: fix dentry leak in ovl_get_redirect
mac80211: fix station rate table updates on assoc
kretprobe: Avoid re-registration of the same kretprobe earlier
xhci: fix bounce buffer usage for non-sg list case
cifs: report error instead of invalid when revalidating a dentry fails
smb3: Fix out-of-bounds bug in SMB2_negotiate()
mmc: core: Limit retries when analyse of SDIO tuples fails
nvme-pci: avoid the deepest sleep state on Kingston A2000 SSDs
ARM: footbridge: fix dc21285 PCI configuration accessors
mm: hugetlbfs: fix cannot migrate the fallocated HugeTLB page
mm: hugetlb: fix a race between isolating and freeing page
mm: hugetlb: remove VM_BUG_ON_PAGE from page_huge_active
mm: thp: fix MADV_REMOVE deadlock on shmem THP
x86/build: Disable CET instrumentation in the kernel
x86/apic: Add extra serialization for non-serializing MSRs
Input: xpad - sync supported devices with fork on GitHub
iommu/vt-d: Do not use flush-queue when caching-mode is on
net: dsa: mv88e6xxx: override existent unicast portvec in port_fdb_add
net: mvpp2: TCAM entry enable should be written after SRAM data
memblock: do not start bottom-up allocations with kernel_end
usb: renesas_usbhs: Clear pipe running flag in usbhs_pkt_pop()
genirq/msi: Activate Multi-MSI early when MSI_FLAG_ACTIVATE_EARLY is set
KVM: SVM: Treat SVM as unsupported when running as an SEV guest
md: Set prev_flush_start and flush_bio in an atomic way
net: ip_tunnel: fix mtu calculation
UBUNTU: upstream stable to v4.14.221, v4.19.175
block: fix NULL pointer dereference in register_disk
remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load
remoteproc: qcom_q6v5_mss: Validate MBA firmware size before load
af_key: relax availability checks for skb size calculation
pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()
iwlwifi: mvm: take mutex for calling iwl_mvm_get_sync_time()
iwlwifi: pcie: add a NULL check in iwl_pcie_txq_unmap
iwlwifi: mvm: guard against device removal in reprobe
SUNRPC: Move simple_get_bytes and simple_get_netobj into private header
SUNRPC: Handle 0 length opaque XDR object data properly
lib/string: Add strscpy_pad() function
include/trace/events/writeback.h: fix -Wstringop-truncation warnings
memcg: fix a crash in wb_workfn when a device disappears
blk-mq: don't hold q->sysfs_lock in blk_mq_map_swqueue
squashfs: add more sanity checks in id lookup
squashfs: add more sanity checks in inode lookup
squashfs: add more sanity checks in xattr id lookup
UBUNTU: upstream stable to v4.19.176