Focal update: v5.4.271 upstream stable release

[Manuel Diewald]

    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:

       v5.4.271 upstream stable release
       from git://git.kernel.org/

netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter
net: ip_tunnel: prevent perpetual headroom growth
tun: Fix xdp_rxq_info's queue_index when detaching
ipv6: fix potential "struct net" leak in inet6_rtm_getaddr()
lan78xx: enable auto speed configuration for LAN7850 if no EEPROM is detected
net: usb: dm9601: fix wrong return value in dm9601_mdio_read
Bluetooth: Avoid potential use-after-free in hci_error_reset
Bluetooth: hci_event: Fix handling of HCI_EV_IO_CAPA_REQUEST
Bluetooth: Enforce validation on max value of connection interval
netfilter: nf_tables: allow NFPROTO_INET in nft_(match/target)_validate()
rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back
efi/capsule-loader: fix incorrect allocation size
power: supply: bq27xxx-i2c: Do not free non existing IRQ
ALSA: Drop leftover snd-rtctimer stuff from Makefile
afs: Fix endless loop in directory parsing
gtp: fix use-after-free and null-ptr-deref in gtp_newlink()
wifi: nl80211: reject iftype change with mesh ID change
btrfs: dev-replace: properly validate device names
dmaengine: fsl-qdma: fix SoC may hang on 16 byte unaligned read
dmaengine: fsl-qdma: init irq after reg initialization
mmc: core: Fix eMMC initialization with 1-bit bus connection
x86/cpu/intel: Detect TME keyid bits before setting MTRR mask registers
cachefiles: fix memory leak in cachefiles_add_cache()
fs,hugetlb: fix NULL pointer dereference in hugetlbs_fill_super
gpio: 74x164: Enable output pins after registers are reset
Linux 5.4.271
UBUNTU: Upstream stable to v5.4.271