Focal update: v5.4.254 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:

       v5.4.254 upstream stable release
       from git://git.kernel.org/

mmc: moxart: read scr register without changing byte order
ipv6: adjust ndisc_is_useropt() to also return true for PIO
dmaengine: pl330: Return DMA_PAUSED when transaction is paused
drm/nouveau/gr: enable memory loads on helper invocation on all channels
radix tree test suite: fix incorrect allocation size for pthreads
nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput
iio: cros_ec: Fix the allocation size for cros_ec_command
binder: fix memory leak in binder_init()
usb-storage: alauda: Fix uninit-value in alauda_check_media()
usb: dwc3: Properly handle processing of pending events
usb: common: usb-conn-gpio: Prevent bailing out if initial role is none
x86/cpu/amd: Enable Zenbleed fix for AMD Custom APU 0405
x86/mm: Fix VDSO and VVAR placement on 5-level paging machines
x86: Move gds_ucode_mitigated() declaration to header
drm/nouveau/disp: Revert a NULL check inside nouveau_connector_get_modes
selftests/rseq: Fix build with undefined __weak
mISDN: Update parameter type of dsp_cmx_send()
net/packet: annotate data-races around tp->status
bonding: Fix incorrect deletion of ETH_P_8021AD protocol vid from slaves
dccp: fix data-race around dp->dccps_mss_cache
drivers: net: prevent tun_build_skb() to exceed the packet size limit
IB/hfi1: Fix possible panic during hotplug remove
wifi: cfg80211: fix sband iftype data lookup for AP_VLAN
dmaengine: mcf-edma: Fix a potential un-allocated memory access
net/mlx5: Allow 0 for total host VFs
ibmvnic: Handle DMA unmapping of login buffs in release functions
btrfs: don't stop integrity writeback too early
btrfs: set cache_block_group_error if we find an error
nvme-tcp: fix potential unbalanced freeze & unfreeze
nvme-rdma: fix potential unbalanced freeze & unfreeze
netfilter: nf_tables: report use refcount overflow
scsi: core: Fix legacy /proc parsing buffer overflow
scsi: storvsc: Fix handling of virtual Fibre Channel timeouts
scsi: 53c700: Check that command slot is not NULL
scsi: snic: Fix possible memory leak if device_add() fails
scsi: core: Fix possible memory leak if device_add() fails
alpha: remove __init annotation from exported page_is_ram()
sch_netem: fix issues in netem_change() vs get_dist_table()
Linux 5.4.254
UBUNTU: Upstream stable to v5.4.254