Bionic update: upstream stable patchset 2020-12-04

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 2020-12-04

                Ported from the following upstream stable releases:
                        v4.14.206, v4.19.157,
                        v4.14.207, v4.19.158

       from git://git.kernel.org/

UBUNTU: upstream stable to v4.14.206, v4.19.157
regulator: defer probe when trying to get voltage from unresolved supply
ring-buffer: Fix recursion protection transitions between interrupt context
time: Prevent undefined behaviour in timespec64_to_ns()
nbd: don't update block size after device is started
btrfs: sysfs: init devices outside of the chunk_mutex
btrfs: reschedule when cloning lots of extents
genirq: Let GENERIC_IRQ_IPI select IRQ_DOMAIN_HIERARCHY
hv_balloon: disable warning when floor reached
net: xfrm: fix a race condition during allocing spi
perf tools: Add missing swap for ino_generation
ALSA: hda: prevent undefined shift in snd_hdac_ext_bus_get_link()
can: rx-offload: don't call kfree_skb() from IRQ context
can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ context
can: dev: __can_get_echo_skb(): fix real payload length return value for RTR frames
can: can_create_echo_skb(): fix echo skb generation: always use skb_clone()
can: peak_usb: add range checking in decode operations
can: peak_usb: peak_usb_get_ts_time(): fix timestamp wrapping
can: peak_canfd: pucan_handle_can_rx(): fix echo management when loopback is on
xfs: flush new eof page on truncate to avoid post-eof corruption
Btrfs: fix missing error return if writeback for extent buffer never started
ath9k_htc: Use appropriate rs_datalen type
usb: gadget: goku_udc: fix potential crashes in probe
gfs2: Free rd_bits later in gfs2_clear_rgrpd to fix use-after-free
gfs2: Add missing truncate_inode_pages_final for sd_aspace
gfs2: check for live vs. read-only file system in gfs2_fitrim
scsi: hpsa: Fix memory leak in hpsa_init_one()
drm/amdgpu: perform srbm soft reset always on SDMA resume
mac80211: fix use of skb payload instead of header
cfg80211: regulatory: Fix inconsistent format argument
scsi: scsi_dh_alua: Avoid crash during alua_bus_detach()
iommu/amd: Increase interrupt remapping table limit to 512 entries
pinctrl: intel: Set default bias in case no particular value given
ARM: 9019/1: kprobes: Avoid fortify_panic() when copying optprobe template
pinctrl: aspeed: Fix GPI only function problem.
nbd: fix a block_device refcount leak in nbd_release
xfs: fix flags argument to rmap lookup when converting shared file rmaps
xfs: fix rmap key and record comparison functions
xfs: fix a missing unlock on error in xfs_fs_map_blocks
of/address: Fix of_node memory leak in of_dma_is_coherent
cosa: Add missing kfree in error path of cosa_write
perf: Fix get_recursion_context()
ext4: correctly report "not supported" for {usr,grp}jquota when !CONFIG_QUOTA
ext4: unlock xattr_sem properly in ext4_inline_data_truncate()
thunderbolt: Add the missed ida_simple_remove() in ring_request_msix()
uio: Fix use-after-free in uio_unregister_device()
usb: cdc-acm: Add DISABLE_ECHO for Renesas USB Download mode
mei: protect mei_cl_mtu from null dereference
futex: Don't enable IRQs unconditionally in put_pi_state()
ocfs2: initialize ip_next_orphan
selinux: Fix error return code in sel_ib_pkey_sid_slow()
don't dump the threads that had been already exiting when zapped.
drm/gma500: Fix out-of-bounds access to struct drm_device.vblank[]
pinctrl: amd: use higher precision for 512 RtcClk
pinctrl: amd: fix incorrect way to disable debounce filter
swiotlb: fix "x86: Don't panic if can not alloc buffer for swiotlb"
IPv6: Set SIT tunnel hard_header_len to zero
net/af_iucv: fix null pointer dereference on shutdown
net/x25: Fix null-ptr-deref in x25_connect
vrf: Fix fast path output packet handling with async Netfilter rules
r8169: fix potential skb double free in an error path
net: Update window_clamp if SOCK_RCVBUF is set
random32: make prandom_u32() output unpredictable
x86/speculation: Allow IBPB to be conditionally enabled on CPUs with always-on STIBP
perf/core: Fix bad use of igrab()
perf/core: Fix crash when using HW tracing kernel filters
perf/core: Fix a memory leak in perf_event_parse_addr_filter()
Revert "kernel/reboot.c: convert simple_strtoul to kstrtoint"
reboot: fix overflow parsing reboot cpu number
Convert trailing spaces and periods in path components
xfs: fix scrub flagging rtinherit even if there is no rt device
drm/amd/pm: perform SMC reset on suspend/hibernation
drm/amd/pm: do not use ixFEATURE_STATUS for checking smc running
s390/smp: move rcu_cpu_starting() earlier
tpm_tis: Disable interrupts on ThinkPad T490s
tick/common: Touch watchdog in tick_unfreeze() on all CPUs
mfd: sprd: Add wakeup capability for PMIC IRQ
btrfs: ref-verify: fix memory leak in btrfs_ref_tree_mod
thunderbolt: Fix memory leak if ida_simple_get() fails in enumerate_services()
btrfs: fix potential overflow in cluster_pages_for_defrag on 32bit arch
mmc: renesas_sdhi_core: Add missing tmio_mmc_host_free() at remove
UBUNTU: upstream stable to v4.14.207, v4.19.158