Changes in 5.15.32
nfc: st21nfca: Fix potential buffer overflows in EVT_TRANSACTION
net: ipv6: fix skb_over_panic in __ip6_append_data
tpm: Fix error handling in async work
Bluetooth: btusb: Add another Realtek 8761BU
llc: fix netdevice reference leaks in llc_ui_bind()
ASoC: sti: Fix deadlock via snd_pcm_stop_xrun() call
ALSA: oss: Fix PCM OSS buffer allocation overflow
ALSA: usb-audio: add mapping for new Corsair Virtuoso SE
ALSA: hda/realtek: Add quirk for Clevo NP70PNJ
ALSA: hda/realtek: Add quirk for Clevo NP50PNJ
ALSA: hda/realtek - Fix headset mic problem for a HP machine with alc671
ALSA: hda/realtek: Add quirk for ASUS GA402
ALSA: pcm: Fix races among concurrent hw_params and hw_free calls
ALSA: pcm: Fix races among concurrent read/write and buffer changes
ALSA: pcm: Fix races among concurrent prepare and hw_params/hw_free calls
ALSA: pcm: Fix races among concurrent prealloc proc writes
ALSA: pcm: Add stream lock during PCM reset ioctl operations
ALSA: usb-audio: Add mute TLV for playback volumes on RODE NT-USB
ALSA: cmipci: Restore aux vol on suspend/resume
ALSA: pci: fix reading of swapped values from pcmreg in AC97 codec
drivers: net: xgene: Fix regression in CRC stripping
netfilter: nf_tables: initialize registers in nft_do_chain()
netfilter: nf_tables: validate registers coming from userspace.
ACPI / x86: Work around broken XSDT on Advantech DAC-BJ01 board
ACPI: battery: Add device HID and quirk for Microsoft Surface Go 3
ACPI: video: Force backlight native for Clevo NL5xRU and NL5xNU
crypto: qat - disable registration of algorithms
Bluetooth: btusb: Add one more Bluetooth part for the Realtek RTL8852AE
Revert "ath: add support for special 0x0 regulatory domain"
drm/virtio: Ensure that objs is not NULL in virtio_gpu_array_put_free()
rcu: Don't deboost before reporting expedited quiescent state
uaccess: fix integer overflow on access_ok()
mac80211: fix potential double free on mesh join
tpm: use try_get_ops() in tpm-space.c
wcn36xx: Differentiate wcn3660 from wcn3620
m68k: fix access_ok for coldfire
nds32: fix access_ok() checks in get/put_user
llc: only change llc->dev when bind() succeeds
Linux 5.15.32
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I3f78747142047de7aa26e2c81bc378d4d0aedaff
commit e702196bf85778f2c5527ca47f33ef2e2fca8297 upstream.
On this board the ACPI RSDP structure points to both a RSDT and an XSDT,
but the XSDT points to a truncated FADT. This causes all sorts of trouble
and usually a complete failure to boot after the following error occurs:
ACPI Error: Unsupported address space: 0x20 (*/hwregs-*)
ACPI Error: AE_SUPPORT, Unable to initialize fixed events (*/evevent-*)
ACPI: Unable to start ACPI Interpreter
This leaves the ACPI implementation in such a broken state that subsequent
kernel subsystem initialisations go wrong, resulting in among others
mismapped PCI memory, SATA and USB enumeration failures, and freezes.
As this is an older embedded platform that will likely never see any BIOS
updates to address this issue and its default shipping OS only complies to
ACPI 1.0, work around this by forcing `acpi=rsdt`. This patch, applied on
top of Linux 5.10.102, was confirmed on real hardware to fix the issue.
Signed-off-by: Mark Cilissen <mark@yotsuba.nl>
Cc: All applicable <stable@vger.kernel.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Changes in 5.15.30
Revert "xfrm: state and policy should fail if XFRMA_IF_ID 0"
arm64: dts: rockchip: fix rk3399-puma-haikou USB OTG mode
xfrm: Check if_id in xfrm_migrate
xfrm: Fix xfrm migrate issues when address family changes
arm64: dts: rockchip: fix rk3399-puma eMMC HS400 signal integrity
arm64: dts: rockchip: align pl330 node name with dtschema
arm64: dts: rockchip: reorder rk3399 hdmi clocks
arm64: dts: agilex: use the compatible "intel,socfpga-agilex-hsotg"
ARM: dts: rockchip: reorder rk322x hmdi clocks
ARM: dts: rockchip: fix a typo on rk3288 crypto-controller
mac80211: refuse aggregations sessions before authorized
MIPS: smp: fill in sibling and core maps earlier
ARM: 9178/1: fix unmet dependency on BITREVERSE for HAVE_ARCH_BITREVERSE
Bluetooth: hci_core: Fix leaking sent_cmd skb
can: rcar_canfd: rcar_canfd_channel_probe(): register the CAN device when fully ready
atm: firestream: check the return value of ioremap() in fs_init()
iwlwifi: don't advertise TWT support
drm/vrr: Set VRR capable prop only if it is attached to connector
nl80211: Update bss channel on channel switch for P2P_CLIENT
tcp: make tcp_read_sock() more robust
sfc: extend the locking on mcdi->seqno
bnx2: Fix an error message
kselftest/vm: fix tests build with old libc
x86/module: Fix the paravirt vs alternative order
ice: Fix race condition during interface enslave
Linux 5.15.30
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Icf3c6ca9fb4bb75435d3964e12c0fcb42397b50b
Changes in 5.15.29
arm64: dts: qcom: sm8350: Describe GCC dependency clocks
arm64: dts: qcom: sm8350: Correct UFS symbol clocks
HID: elo: Revert USB reference counting
HID: hid-thrustmaster: fix OOB read in thrustmaster_interrupts
ARM: boot: dts: bcm2711: Fix HVS register range
clk: qcom: gdsc: Add support to update GDSC transition delay
clk: qcom: dispcc: Update the transition delay for MDSS GDSC
HID: vivaldi: fix sysfs attributes leak
arm64: dts: armada-3720-turris-mox: Add missing ethernet0 alias
tipc: fix kernel panic when enabling bearer
vdpa/mlx5: add validation for VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET command
vduse: Fix returning wrong type in vduse_domain_alloc_iova()
net: phy: meson-gxl: fix interrupt handling in forced mode
mISDN: Fix memory leak in dsp_pipeline_build()
vhost: fix hung thread due to erroneous iotlb entries
virtio-blk: Don't use MAX_DISCARD_SEGMENTS if max_discard_seg is zero
vdpa: fix use-after-free on vp_vdpa_remove
isdn: hfcpci: check the return value of dma_set_mask() in setup_hw()
net: qlogic: check the return value of dma_alloc_coherent() in qed_vf_hw_prepare()
esp: Fix possible buffer overflow in ESP transformation
esp: Fix BEET mode inter address family tunneling on GSO
qed: return status of qed_iov_get_link
smsc95xx: Ignore -ENODEV errors when device is unplugged
gpiolib: acpi: Convert ACPI value of debounce to microseconds
drm/sun4i: mixer: Fix P010 and P210 format numbers
net: dsa: mt7530: fix incorrect test in mt753x_phylink_validate()
ARM: dts: aspeed: Fix AST2600 quad spi group
iavf: Fix handling of vlan strip virtual channel messages
i40e: stop disabling VFs due to PF error responses
ice: stop disabling VFs due to PF error responses
ice: Fix error with handling of bonding MTU
ice: Don't use GFP_KERNEL in atomic context
ice: Fix curr_link_speed advertised speed
ethernet: Fix error handling in xemaclite_of_probe
tipc: fix incorrect order of state message data sanity check
net: ethernet: ti: cpts: Handle error for clk_enable
net: ethernet: lpc_eth: Handle error for clk_enable
net: marvell: prestera: Add missing of_node_put() in prestera_switch_set_base_mac_addr
ax25: Fix NULL pointer dereference in ax25_kill_by_device
net/mlx5: Fix size field in bufferx_reg struct
net/mlx5: Fix a race on command flush flow
net/mlx5e: Lag, Only handle events from highest priority multipath entry
NFC: port100: fix use-after-free in port100_send_complete
selftests: pmtu.sh: Kill tcpdump processes launched by subshell.
selftests: pmtu.sh: Kill nettest processes launched in subshell.
gpio: ts4900: Do not set DAT and OE together
gianfar: ethtool: Fix refcount leak in gfar_get_ts_info
net: phy: DP83822: clear MISR2 register to disable interrupts
sctp: fix kernel-infoleak for SCTP sockets
net: bcmgenet: Don't claim WOL when its not available
net: phy: meson-gxl: improve link-up behavior
selftests/bpf: Add test for bpf_timer overwriting crash
swiotlb: fix info leak with DMA_FROM_DEVICE
usb: dwc3: pci: add support for the Intel Raptor Lake-S
pinctrl: tigerlake: Revert "Add Alder Lake-M ACPI ID"
KVM: Fix lockdep false negative during host resume
kvm: x86: Disable KVM_HC_CLOCK_PAIRING if tsc is in always catchup mode
spi: rockchip: Fix error in getting num-cs property
spi: rockchip: terminate dma transmission when slave abort
drm/vc4: hdmi: Unregister codec device on unbind
x86/kvm: Don't use pv tlb/ipi/sched_yield if on 1 vCPU
net-sysfs: add check for netdevice being present to speed_show
hwmon: (pmbus) Clear pmbus fault/warning bits after read
PCI: Mark all AMD Navi10 and Navi14 GPU ATS as broken
gpio: Return EPROBE_DEFER if gc->to_irq is NULL
drm/amdgpu: bypass tiling flag check in virtual display case (v2)
Revert "xen-netback: remove 'hotplug-status' once it has served its purpose"
Revert "xen-netback: Check for hotplug-status existence before watching"
ipv6: prevent a possible race condition with lifetimes
tracing: Ensure trace buffer is at least 4096 bytes large
tracing/osnoise: Make osnoise_main to sleep for microseconds
selftest/vm: fix map_fixed_noreplace test failure
selftests/memfd: clean up mapping in mfd_fail_write
ARM: Spectre-BHB: provide empty stub for non-config
fuse: fix fileattr op failure
fuse: fix pipe buffer lifetime for direct_io
staging: rtl8723bs: Fix access-point mode deadlock
staging: gdm724x: fix use after free in gdm_lte_rx()
net: macb: Fix lost RX packet wakeup race in NAPI receive
riscv: alternative only works on !XIP_KERNEL
mmc: meson: Fix usage of meson_mmc_post_req()
riscv: Fix auipc+jalr relocation range checks
tracing/osnoise: Force quiescent states while tracing
arm64: dts: marvell: armada-37xx: Remap IO space to bus address 0x0
arm64: Ensure execute-only permissions are not allowed without EPAN
arm64: kasan: fix include error in MTE functions
swiotlb: rework "fix info leak with DMA_FROM_DEVICE"
KVM: x86/mmu: kvm_faultin_pfn has to return false if pfh is returned
virtio: unexport virtio_finalize_features
virtio: acknowledge all features before access
net/mlx5: Fix offloading with ESWITCH_IPV4_TTL_MODIFY_ENABLE
ARM: fix Thumb2 regression with Spectre BHB
watch_queue: Fix filter limit check
watch_queue, pipe: Free watchqueue state after clearing pipe ring
watch_queue: Fix to release page in ->release()
watch_queue: Fix to always request a pow-of-2 pipe ring size
watch_queue: Fix the alloc bitmap size to reflect notes allocated
watch_queue: Free the alloc bitmap when the watch_queue is torn down
watch_queue: Fix lack of barrier/sync/lock between post and read
watch_queue: Make comment about setting ->defunct more accurate
x86/boot: Fix memremap of setup_indirect structures
x86/boot: Add setup_indirect support in early_memremap_is_setup_data()
x86/sgx: Free backing memory after faulting the enclave page
x86/traps: Mark do_int3() NOKPROBE_SYMBOL
drm/panel: Select DRM_DP_HELPER for DRM_PANEL_EDP
btrfs: make send work with concurrent block group relocation
drm/i915: Workaround broken BIOS DBUF configuration on TGL/RKL
riscv: dts: k210: fix broken IRQs on hart1
block: drop unused includes in <linux/genhd.h>
Revert "net: dsa: mv88e6xxx: flush switchdev FDB workqueue before removing VLAN"
vhost: allow batching hint without size
Linux 5.15.29
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I5c9c6006b90a8283a81fd5f7c79776e1a0cfb6b1
Changes in 5.15.28
slip: fix macro redefine warning
x86,bugs: Unconditionally allow spectre_v2=retpoline,amd
x86/speculation: Rename RETPOLINE_AMD to RETPOLINE_LFENCE
x86/speculation: Add eIBRS + Retpoline options
Documentation/hw-vuln: Update spectre doc
x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting
x86/speculation: Use generic retpoline by default on AMD
x86/speculation: Update link to AMD speculation whitepaper
x86/speculation: Warn about Spectre v2 LFENCE mitigation
x86/speculation: Warn about eIBRS + LFENCE + Unprivileged eBPF + SMT
ARM: report Spectre v2 status through sysfs
ARM: early traps initialisation
ARM: use LOADADDR() to get load address of sections
ARM: Spectre-BHB workaround
ARM: include unprivileged BPF status in Spectre V2 reporting
arm64: Add Neoverse-N2, Cortex-A710 CPU part definition
arm64: Add HWCAP for self-synchronising virtual counter
arm64: Add Cortex-X2 CPU part definition
arm64: add ID_AA64ISAR2_EL1 sys register
arm64: cpufeature: add HWCAP for FEAT_AFP
arm64: cpufeature: add HWCAP for FEAT_RPRES
arm64: entry.S: Add ventry overflow sanity checks
arm64: spectre: Rename spectre_v4_patch_fw_mitigation_conduit
KVM: arm64: Allow indirect vectors to be used without SPECTRE_V3A
arm64: entry: Make the trampoline cleanup optional
arm64: entry: Free up another register on kpti's tramp_exit path
arm64: entry: Move the trampoline data page before the text page
arm64: entry: Allow tramp_alias to access symbols after the 4K boundary
arm64: entry: Don't assume tramp_vectors is the start of the vectors
arm64: entry: Move trampoline macros out of ifdef'd section
arm64: entry: Make the kpti trampoline's kpti sequence optional
arm64: entry: Allow the trampoline text to occupy multiple pages
arm64: entry: Add non-kpti __bp_harden_el1_vectors for mitigations
arm64: entry: Add vectors that have the bhb mitigation sequences
arm64: entry: Add macro for reading symbol addresses from the trampoline
arm64: Add percpu vectors for EL1
arm64: proton-pack: Report Spectre-BHB vulnerabilities as part of Spectre-v2
arm64: Mitigate spectre style branch history side channels
KVM: arm64: Allow SMCCC_ARCH_WORKAROUND_3 to be discovered and migrated
arm64: Use the clearbhb instruction in mitigations
arm64: proton-pack: Include unprivileged eBPF status in Spectre v2 mitigation reporting
ARM: fix build error when BPF_SYSCALL is disabled
ARM: fix co-processor register typo
ARM: Do not use NOCROSSREFS directive with ld.lld
arm64: Do not include __READ_ONCE() block in assembly files
ARM: fix build warning in proc-v7-bugs.c
xen/xenbus: don't let xenbus_grant_ring() remove grants in error case
xen/grant-table: add gnttab_try_end_foreign_access()
xen/blkfront: don't use gnttab_query_foreign_access() for mapped status
xen/netfront: don't use gnttab_query_foreign_access() for mapped status
xen/scsifront: don't use gnttab_query_foreign_access() for mapped status
xen/gntalloc: don't use gnttab_query_foreign_access()
xen: remove gnttab_query_foreign_access()
xen/9p: use alloc/free_pages_exact()
xen/pvcalls: use alloc/free_pages_exact()
xen/gnttab: fix gnttab_end_foreign_access() without page specified
xen/netfront: react properly to failing gnttab_end_foreign_access_ref()
Revert "ACPI: PM: s2idle: Cancel wakeup before dispatching EC GPE"
Linux 5.15.28
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I6d6fcf4f171c097168e17ecff30e1c510cf69fe8
commit 08999b2489b4c9b939d7483dbd03702ee4576d96 upstream.
There is a limited amount of SGX memory (EPC) on each system. When that
memory is used up, SGX has its own swapping mechanism which is similar
in concept but totally separate from the core mm/* code. Instead of
swapping to disk, SGX swaps from EPC to normal RAM. That normal RAM
comes from a shared memory pseudo-file and can itself be swapped by the
core mm code. There is a hierarchy like this:
EPC <-> shmem <-> disk
After data is swapped back in from shmem to EPC, the shmem backing
storage needs to be freed. Currently, the backing shmem is not freed.
This effectively wastes the shmem while the enclave is running. The
memory is recovered when the enclave is destroyed and the backing
storage freed.
Sort this out by freeing memory with shmem_truncate_range(), as soon as
a page is faulted back to the EPC. In addition, free the memory for
PCMD pages as soon as all PCMD's in a page have been marked as unused
by zeroing its contents.
Cc: stable@vger.kernel.org
Fixes: 1728ab54b4 ("x86/sgx: Add a page reclaimer")
Reported-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lkml.kernel.org/r/20220303223859.273187-1-jarkko@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 7228918b34615ef6317edcd9a058a057bc54aa32 upstream.
As documented, the setup_indirect structure is nested inside
the setup_data structures in the setup_data list. The code currently
accesses the fields inside the setup_indirect structure but only
the sizeof(struct setup_data) is being memremapped. No crash
occurred but this is just due to how the area is remapped under the
covers.
Properly memremap both the setup_data and setup_indirect structures
in these cases before accessing them.
Fixes: b3c72fc9a7 ("x86/boot: Introduce setup_indirect")
Signed-off-by: Ross Philipson <ross.philipson@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1645668456-22036-2-git-send-email-ross.philipson@oracle.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Changes in 5.15.26
mm/filemap: Fix handling of THPs in generic_file_buffered_read()
cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug
cgroup-v1: Correct privileges check in release_agent writes
x86/ptrace: Fix xfpregs_set()'s incorrect xmm clearing
btrfs: tree-checker: check item_size for inode_item
btrfs: tree-checker: check item_size for dev_item
clk: jz4725b: fix mmc0 clock gating
io_uring: don't convert to jiffies for waiting on timeouts
io_uring: disallow modification of rsrc_data during quiesce
selinux: fix misuse of mutex_is_locked()
vhost/vsock: don't check owner in vhost_vsock_stop() while releasing
parisc/unaligned: Fix fldd and fstd unaligned handlers on 32-bit kernel
parisc/unaligned: Fix ldw() and stw() unalignment handlers
KVM: x86/mmu: make apf token non-zero to fix bug
drm/amd/display: Protect update_bw_bounding_box FPU code.
drm/amd/pm: fix some OEM SKU specific stability issues
drm/amd: Check if ASPM is enabled from PCIe subsystem
drm/amdgpu: disable MMHUB PG for Picasso
drm/amdgpu: do not enable asic reset for raven2
drm/i915: Widen the QGV point mask
drm/i915: Correctly populate use_sagv_wm for all pipes
drm/i915: Fix bw atomic check when switching between SAGV vs. no SAGV
sr9700: sanity check for packet length
USB: zaurus: support another broken Zaurus
CDC-NCM: avoid overflow in sanity checking
netfilter: xt_socket: fix a typo in socket_mt_destroy()
netfilter: xt_socket: missing ifdef CONFIG_IP6_NF_IPTABLES dependency
netfilter: nf_tables_offload: incorrect flow offload action array size
tee: export teedev_open() and teedev_close_context()
optee: use driver internal tee_context for some rpc
ping: remove pr_err from ping_lookup
Revert "i40e: Fix reset bw limit when DCB enabled with 1 TC"
gpu: host1x: Always return syncpoint value when waiting
perf evlist: Fix failed to use cpu list for uncore events
perf data: Fix double free in perf_session__delete()
mptcp: fix race in incoming ADD_ADDR option processing
mptcp: add mibs counter for ignored incoming options
selftests: mptcp: fix diag instability
selftests: mptcp: be more conservative with cookie MPJ limits
bnx2x: fix driver load from initrd
bnxt_en: Fix active FEC reporting to ethtool
bnxt_en: Fix offline ethtool selftest with RDMA enabled
bnxt_en: Fix incorrect multicast rx mask setting when not requested
hwmon: Handle failure to register sensor with thermal zone correctly
net/mlx5: Fix tc max supported prio for nic mode
ice: check the return of ice_ptp_gettimex64
ice: initialize local variable 'tlv'
net/mlx5: Update the list of the PCI supported devices
bpf: Fix crash due to incorrect copy_map_value
bpf: Do not try bpf_msg_push_data with len 0
selftests: bpf: Check bpf_msg_push_data return value
bpf: Fix a bpf_timer initialization issue
bpf: Add schedule points in batch ops
io_uring: add a schedule point in io_add_buffers()
net: __pskb_pull_tail() & pskb_carve_frag_list() drop_monitor friends
nvme: also mark passthrough-only namespaces ready in nvme_update_ns_info
tipc: Fix end of loop tests for list_for_each_entry()
gso: do not skip outer ip header in case of ipip and net_failover
net: mv643xx_eth: process retval from of_get_mac_address
openvswitch: Fix setting ipv6 fields causing hw csum failure
drm/edid: Always set RGB444
net/mlx5e: Fix wrong return value on ioctl EEPROM query failure
drm/vc4: crtc: Fix runtime_pm reference counting
drm/i915/dg2: Print PHY name properly on calibration error
net/sched: act_ct: Fix flow table lookup after ct clear or switching zones
net: ll_temac: check the return value of devm_kmalloc()
net: Force inlining of checksum functions in net/checksum.h
netfilter: nf_tables: unregister flowtable hooks on netns exit
nfp: flower: Fix a potential leak in nfp_tunnel_add_shared_mac()
net: mdio-ipq4019: add delay after clock enable
netfilter: nf_tables: fix memory leak during stateful obj update
net/smc: Use a mutex for locking "struct smc_pnettable"
surface: surface3_power: Fix battery readings on batteries without a serial number
udp_tunnel: Fix end of loop test in udp_tunnel_nic_unregister()
net/mlx5: DR, Cache STE shadow memory
ibmvnic: schedule failover only if vioctl fails
net/mlx5: DR, Don't allow match on IP w/o matching on full ethertype/ip_version
net/mlx5: Fix possible deadlock on rule deletion
net/mlx5: Fix wrong limitation of metadata match on ecpf
net/mlx5: DR, Fix the threshold that defines when pool sync is initiated
net/mlx5e: MPLSoUDP decap, fix check for unsupported matches
net/mlx5e: kTLS, Use CHECKSUM_UNNECESSARY for device-offloaded packets
net/mlx5: Update log_max_qp value to be 17 at most
spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op()
gpio: rockchip: Reset int_bothedge when changing trigger
regmap-irq: Update interrupt clear register for proper reset
net-timestamp: convert sk->sk_tskey to atomic_t
RDMA/rtrs-clt: Fix possible double free in error case
RDMA/rtrs-clt: Move free_permit from free_clt to rtrs_clt_close
bnxt_en: Increase firmware message response DMA wait time
configfs: fix a race in configfs_{,un}register_subsystem()
RDMA/ib_srp: Fix a deadlock
tracing: Dump stacktrace trigger to the corresponding instance
tracing: Have traceon and traceoff trigger honor the instance
iio:imu:adis16480: fix buffering for devices with no burst mode
iio: adc: men_z188_adc: Fix a resource leak in an error handling path
iio: adc: tsc2046: fix memory corruption by preventing array overflow
iio: adc: ad7124: fix mask used for setting AIN_BUFP & AIN_BUFM bits
iio: accel: fxls8962af: add padding to regmap for SPI
iio: imu: st_lsm6dsx: wait for settling time in st_lsm6dsx_read_oneshot
iio: Fix error handling for PM
sc16is7xx: Fix for incorrect data being transmitted
ata: pata_hpt37x: disable primary channel on HPT371
Revert "USB: serial: ch341: add new Product ID for CH341A"
usb: gadget: rndis: add spinlock for rndis response list
USB: gadget: validate endpoint index for xilinx udc
tracefs: Set the group ownership in apply_options() not parse_options()
USB: serial: option: add support for DW5829e
USB: serial: option: add Telit LE910R1 compositions
usb: dwc2: drd: fix soft connect when gadget is unconfigured
usb: dwc3: pci: Add "snps,dis_u2_susphy_quirk" for Intel Bay Trail
usb: dwc3: pci: Fix Bay Trail phy GPIO mappings
usb: dwc3: gadget: Let the interrupt handler disable bottom halves.
xhci: re-initialize the HC during resume if HCE was set
xhci: Prevent futile URB re-submissions due to incorrect return value.
nvmem: core: Fix a conflict between MTD and NVMEM on wp-gpios property
mtd: core: Fix a conflict between MTD and NVMEM on wp-gpios property
driver core: Free DMA range map when device is released
btrfs: prevent copying too big compressed lzo segment
RDMA/cma: Do not change route.addr.src_addr outside state checks
thermal: int340x: fix memory leak in int3400_notify()
staging: fbtft: fb_st7789v: reset display before initialization
tps6598x: clear int mask on probe failure
IB/qib: Fix duplicate sysfs directory name
riscv: fix nommu_k210_sdcard_defconfig
riscv: fix oops caused by irqsoff latency tracer
tty: n_gsm: fix encoding of control signal octet bit DV
tty: n_gsm: fix proper link termination after failed open
tty: n_gsm: fix NULL pointer access due to DLCI release
tty: n_gsm: fix wrong tty control line for flow control
tty: n_gsm: fix wrong modem processing in convergence layer type 2
tty: n_gsm: fix deadlock in gsmtty_open()
pinctrl: fix loop in k210_pinconf_get_drive()
pinctrl: k210: Fix bias-pull-up
gpio: tegra186: Fix chip_data type confusion
memblock: use kfree() to release kmalloced memblock regions
ice: Fix race conditions between virtchnl handling and VF ndo ops
ice: fix concurrent reset and removal of VFs
Linux 5.15.26
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ied0cc9bd48b7af71a064107676f37b0dd39ce3cf
commit 0de05d056afdb00eca8c7bbb0c79a3438daf700c upstream.
The commit
44a3918c8245 ("x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting")
added a warning for the "eIBRS + unprivileged eBPF" combination, which
has been shown to be vulnerable against Spectre v2 BHB-based attacks.
However, there's no warning about the "eIBRS + LFENCE retpoline +
unprivileged eBPF" combo. The LFENCE adds more protection by shortening
the speculation window after a mispredicted branch. That makes an attack
significantly more difficult, even with unprivileged eBPF. So at least
for now the logic doesn't warn about that combination.
But if you then add SMT into the mix, the SMT attack angle weakens the
effectiveness of the LFENCE considerably.
So extend the "eIBRS + unprivileged eBPF" warning to also include the
"eIBRS + LFENCE + unprivileged eBPF + SMT" case.
[ bp: Massage commit message. ]
Suggested-by: Alyssa Milburn <alyssa.milburn@linux.intel.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit eafd987d4a82c7bb5aa12f0e3b4f8f3dea93e678 upstream.
With:
f8a66d608a3e ("x86,bugs: Unconditionally allow spectre_v2=retpoline,amd")
it became possible to enable the LFENCE "retpoline" on Intel. However,
Intel doesn't recommend it, as it has some weaknesses compared to
retpoline.
Now AMD doesn't recommend it either.
It can still be left available as a cmdline option. It's faster than
retpoline but is weaker in certain scenarios -- particularly SMT, but
even non-SMT may be vulnerable in some cases.
So just unconditionally warn if the user requests it on the cmdline.
[ bp: Massage commit message. ]
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 244d00b5dd4755f8df892c86cab35fb2cfd4f14b upstream.
AMD retpoline may be susceptible to speculation. The speculation
execution window for an incorrect indirect branch prediction using
LFENCE/JMP sequence may potentially be large enough to allow
exploitation using Spectre V2.
By default, don't use retpoline,lfence on AMD. Instead, use the
generic retpoline.
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 44a3918c8245ab10c6c9719dd12e7a8d291980d8 upstream.
With unprivileged eBPF enabled, eIBRS (without retpoline) is vulnerable
to Spectre v2 BHB-based attacks.
When both are enabled, print a warning message and report it in the
'spectre_v2' sysfs vulnerabilities file.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
[fllinden@amazon.com: backported to 5.15]
Signed-off-by: Frank van der Linden <fllinden@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 1e19da8522c81bf46b335f84137165741e0d82b7 upstream.
Thanks to the chaps at VUsec it is now clear that eIBRS is not
sufficient, therefore allow enabling of retpolines along with eIBRS.
Add spectre_v2=eibrs, spectre_v2=eibrs,lfence and
spectre_v2=eibrs,retpoline options to explicitly pick your preferred
means of mitigation.
Since there's new mitigations there's also user visible changes in
/sys/devices/system/cpu/vulnerabilities/spectre_v2 to reflect these
new mitigations.
[ bp: Massage commit message, trim error messages,
do more precise eIBRS mode checking. ]
Co-developed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Patrick Colp <patrick.colp@oracle.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit d45476d9832409371537013ebdd8dc1a7781f97a upstream.
The RETPOLINE_AMD name is unfortunate since it isn't necessarily
AMD only, in fact Hygon also uses it. Furthermore it will likely be
sufficient for some Intel processors. Therefore rename the thing to
RETPOLINE_LFENCE to better describe what it is.
Add the spectre_v2=retpoline,lfence option as an alias to
spectre_v2=retpoline,amd to preserve existing setups. However, the output
of /sys/devices/system/cpu/vulnerabilities/spectre_v2 will be changed.
[ bp: Fix typos, massage. ]
Co-developed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
[fllinden@amazon.com: backported to 5.15]
Signed-off-by: Frank van der Linden <fllinden@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 44cad52cc14ae10062f142ec16ede489bccf4469 upstream.
xfpregs_set() handles 32-bit REGSET_XFP and 64-bit REGSET_FP. The actual
code treats these regsets as modern FX state (i.e. the beginning part of
XSTATE). The declarations of the regsets thought they were the legacy
i387 format. The code thought they were the 32-bit (no xmm8..15) variant
of XSTATE and, for good measure, made the high bits disappear by zeroing
the wrong part of the buffer. The latter broke ptrace, and everything
else confused anyone trying to understand the code. In particular, the
nonsense definitions of the regsets confused me when I wrote this code.
Clean this all up. Change the declarations to match reality (which
shouldn't change the generated code, let alone the ABI) and fix
xfpregs_set() to clear the correct bits and to only do so for 32-bit
callers.
Fixes: 6164331d15 ("x86/fpu: Rewrite xfpregs_set()")
Reported-by: Luís Ferreira <contact@lsferreira.net>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=215524
Link: https://lore.kernel.org/r/YgpFnZpF01WwR8wU@zn.tnic
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Changes in 5.15.24
integrity: check the return value of audit_log_start()
ima: fix reference leak in asymmetric_verify()
ima: Remove ima_policy file before directory
ima: Allow template selection with ima_template[_fmt]= after ima_hash=
ima: Do not print policy rule with inactive LSM labels
mmc: sdhci-of-esdhc: Check for error num after setting mask
mmc: core: Wait for command setting 'Power Off Notification' bit to complete
can: isotp: fix potential CAN frame reception race in isotp_rcv()
can: isotp: fix error path in isotp_sendmsg() to unlock wait queue
net: phy: marvell: Fix RGMII Tx/Rx delays setting in 88e1121-compatible PHYs
net: phy: marvell: Fix MDI-x polarity setting in 88e1118-compatible PHYs
NFS: Fix initialisation of nfs_client cl_flags field
NFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes
NFSD: Fix ia_size underflow
NFSD: Clamp WRITE offsets
NFSD: Fix offset type in I/O trace points
NFSD: Fix the behavior of READ near OFFSET_MAX
thermal/drivers/int340x: Improve the tcc offset saving for suspend/resume
thermal/drivers/int340x: processor_thermal: Suppot 64 bit RFIM responses
thermal: int340x: Limit Kconfig to 64-bit
thermal/drivers/int340x: Fix RFIM mailbox write commands
tracing: Propagate is_signed to expression
NFS: change nfs_access_get_cached to only report the mask
NFSv4 only print the label when its queried
nfs: nfs4clinet: check the return value of kstrdup()
NFSv4.1: Fix uninitialised variable in devicenotify
NFSv4 remove zero number of fs_locations entries error check
NFSv4 store server support for fs_location attribute
NFSv4.1 query for fs_location attr on a new file system
NFSv4 expose nfs_parse_server_name function
NFSv4 handle port presence in fs_location server string
SUNRPC allow for unspecified transport time in rpc_clnt_add_xprt
net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change
sunrpc: Fix potential race conditions in rpc_sysfs_xprt_state_change()
irqchip/realtek-rtl: Service all pending interrupts
perf/x86/rapl: fix AMD event handling
x86/perf: Avoid warning for Arch LBR without XSAVE
sched: Avoid double preemption in __cond_resched_*lock*()
drm/vc4: Fix deadlock on DSI device attach error
drm: panel-orientation-quirks: Add quirk for the 1Netbook OneXPlayer
net: sched: Clarify error message when qdisc kind is unknown
powerpc/fixmap: Fix VM debug warning on unmap
scsi: target: iscsi: Make sure the np under each tpg is unique
scsi: ufs: ufshcd-pltfrm: Check the return value of devm_kstrdup()
scsi: qedf: Add stag_work to all the vports
scsi: qedf: Fix refcount issue when LOGO is received during TMF
scsi: qedf: Change context reset messages to ratelimited
scsi: pm8001: Fix bogus FW crash for maxcpus=1
scsi: ufs: Use generic error code in ufshcd_set_dev_pwr_mode()
scsi: ufs: Treat link loss as fatal error
scsi: myrs: Fix crash in error case
net: stmmac: reduce unnecessary wakeups from eee sw timer
PM: hibernate: Remove register_nosave_region_late()
drm/amd/display: Correct MPC split policy for DCN301
usb: dwc2: gadget: don't try to disable ep0 in dwc2_hsotg_suspend
perf: Always wake the parent event
nvme-pci: add the IGNORE_DEV_SUBNQN quirk for Intel P4500/P4600 SSDs
MIPS: Fix build error due to PTR used in more places
net: stmmac: dwmac-sun8i: use return val of readl_poll_timeout()
KVM: eventfd: Fix false positive RCU usage warning
KVM: nVMX: eVMCS: Filter out VM_EXIT_SAVE_VMX_PREEMPTION_TIMER
KVM: nVMX: Also filter MSR_IA32_VMX_TRUE_PINBASED_CTLS when eVMCS
KVM: SVM: Don't kill SEV guest if SMAP erratum triggers in usermode
KVM: VMX: Set vmcs.PENDING_DBG.BS on #DB in STI/MOVSS blocking shadow
KVM: x86: Report deprecated x87 features in supported CPUID
riscv: fix build with binutils 2.38
riscv: cpu-hotplug: clear cpu from numa map when teardown
riscv: eliminate unreliable __builtin_frame_address(1)
gfs2: Fix gfs2_release for non-writers regression
ARM: dts: imx23-evk: Remove MX23_PAD_SSP1_DETECT from hog group
ARM: dts: Fix boot regression on Skomer
ARM: socfpga: fix missing RESET_CONTROLLER
nvme-tcp: fix bogus request completion when failing to send AER
ACPI/IORT: Check node revision for PMCG resources
PM: s2idle: ACPI: Fix wakeup interrupts handling
drm/amdgpu/display: change pipe policy for DCN 2.0
drm/rockchip: vop: Correct RK3399 VOP register fields
drm/i915: Allow !join_mbus cases for adlp+ dbuf configuration
drm/i915: Populate pipe dbuf slices more accurately during readout
ARM: dts: Fix timer regression for beagleboard revision c
ARM: dts: meson: Fix the UART compatible strings
ARM: dts: meson8: Fix the UART device-tree schema validation
ARM: dts: meson8b: Fix the UART device-tree schema validation
phy: broadcom: Kconfig: Fix PHY_BRCM_USB config option
staging: fbtft: Fix error path in fbtft_driver_module_init()
ARM: dts: imx6qdl-udoo: Properly describe the SD card detect
phy: xilinx: zynqmp: Fix bus width setting for SGMII
phy: stm32: fix a refcount leak in stm32_usbphyc_pll_enable()
ARM: dts: imx7ulp: Fix 'assigned-clocks-parents' typo
arm64: dts: imx8mq: fix mipi_csi bidirectional port numbers
usb: f_fs: Fix use-after-free for epfile
phy: dphy: Correct clk_pre parameter
gpio: aggregator: Fix calling into sleeping GPIO controllers
NFS: Don't overfill uncached readdir pages
NFS: Don't skip directory entries when doing uncached readdir
drm/vc4: hdmi: Allow DBLCLK modes even if horz timing is odd.
misc: fastrpc: avoid double fput() on failed usercopy
net: sparx5: Fix get_stat64 crash in tcpdump
netfilter: ctnetlink: disable helper autoassign
arm64: dts: meson-g12b-odroid-n2: fix typo 'dio2133'
arm64: dts: meson-sm1-odroid: use correct enable-gpio pin for tf-io regulator
arm64: dts: meson-sm1-bananapi-m5: fix wrong GPIO domain for GPIOE_2
arm64: dts: meson-sm1-odroid: fix boot loop after reboot
ixgbevf: Require large buffers for build_skb on 82599VF
drm/panel: simple: Assign data from panel_dpi_probe() correctly
ACPI: PM: s2idle: Cancel wakeup before dispatching EC GPE
gpiolib: Never return internal error codes to user space
gpio: sifive: use the correct register to read output values
fbcon: Avoid 'cap' set but not used warning
bonding: pair enable_port with slave_arr_updates
net: dsa: mv88e6xxx: don't use devres for mdiobus
net: dsa: ar9331: register the mdiobus under devres
net: dsa: bcm_sf2: don't use devres for mdiobus
net: dsa: felix: don't use devres for mdiobus
net: dsa: mt7530: fix kernel bug in mdiobus_free() when unbinding
net: dsa: lantiq_gswip: don't use devres for mdiobus
ipmr,ip6mr: acquire RTNL before calling ip[6]mr_free_table() on failure path
nfp: flower: fix ida_idx not being released
net: do not keep the dst cache when uncloning an skb dst and its metadata
net: fix a memleak when uncloning an skb dst and its metadata
veth: fix races around rq->rx_notify_masked
net: mdio: aspeed: Add missing MODULE_DEVICE_TABLE
tipc: rate limit warning for received illegal binding update
net: amd-xgbe: disable interrupts during pci removal
drm/amd/pm: fix hwmon node of power1_label create issue
mptcp: netlink: process IPv6 addrs in creating listening sockets
dpaa2-eth: unregister the netdev before disconnecting from the PHY
ice: fix an error code in ice_cfg_phy_fec()
ice: fix IPIP and SIT TSO offload
ice: Fix KASAN error in LAG NETDEV_UNREGISTER handler
ice: Avoid RTNL lock when re-creating auxiliary device
net: mscc: ocelot: fix mutex lock error during ethtool stats read
net: dsa: mv88e6xxx: fix use-after-free in mv88e6xxx_mdios_unregister
vt_ioctl: fix array_index_nospec in vt_setactivate
vt_ioctl: add array_index_nospec to VT_ACTIVATE
n_tty: wake up poll(POLLRDNORM) on receiving data
eeprom: ee1004: limit i2c reads to I2C_SMBUS_BLOCK_MAX
usb: dwc2: drd: fix soft connect when gadget is unconfigured
Revert "usb: dwc2: drd: fix soft connect when gadget is unconfigured"
net: usb: ax88179_178a: Fix out-of-bounds accesses in RX fixup
usb: ulpi: Move of_node_put to ulpi_dev_release
usb: ulpi: Call of_node_put correctly
usb: dwc3: gadget: Prevent core from processing stale TRBs
usb: gadget: udc: renesas_usb3: Fix host to USB_ROLE_NONE transition
USB: gadget: validate interface OS descriptor requests
usb: gadget: rndis: check size of RNDIS_MSG_SET command
usb: gadget: f_uac2: Define specific wTerminalType
usb: raw-gadget: fix handling of dual-direction-capable endpoints
USB: serial: ftdi_sio: add support for Brainboxes US-159/235/320
USB: serial: option: add ZTE MF286D modem
USB: serial: ch341: add support for GW Instek USB2.0-Serial devices
USB: serial: cp210x: add NCR Retail IO box id
USB: serial: cp210x: add CPI Bulk Coin Recycler id
speakup-dectlk: Restore pitch setting
phy: ti: Fix missing sentinel for clk_div_table
iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL
mm: memcg: synchronize objcg lists with a dedicated spinlock
seccomp: Invalidate seccomp mode to catch death failures
signal: HANDLER_EXIT should clear SIGNAL_UNKILLABLE
s390/cio: verify the driver availability for path_event call
bus: mhi: pci_generic: Add mru_default for Foxconn SDX55
bus: mhi: pci_generic: Add mru_default for Cinterion MV31-W
hwmon: (dell-smm) Speed up setting of fan speed
x86/sgx: Silence softlockup detection when releasing large enclaves
Makefile.extrawarn: Move -Wunaligned-access to W=1
scsi: lpfc: Remove NVMe support if kernel has NVME_FC disabled
scsi: lpfc: Reduce log messages seen after firmware download
MIPS: octeon: Fix missed PTR->PTR_WD conversion
arm64: dts: imx8mq: fix lcdif port node
perf: Fix list corruption in perf_cgroup_switch()
iommu: Fix potential use-after-free during probe
Linux 5.15.24
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ibe10e24eeda28e78c35f7656bc49cf11f58d858c
commit 8795359e35bc33bf86b6d0765aa7f37431db3b9c upstream.
Vijay reported that the "unclobbered_vdso_oversubscribed" selftest
triggers the softlockup detector.
Actual SGX systems have 128GB of enclave memory or more. The
"unclobbered_vdso_oversubscribed" selftest creates one enclave which
consumes all of the enclave memory on the system. Tearing down such a
large enclave takes around a minute, most of it in the loop where
the EREMOVE instruction is applied to each individual 4k enclave page.
Spending one minute in a loop triggers the softlockup detector.
Add a cond_resched() to give other tasks a chance to run and placate
the softlockup detector.
Cc: stable@vger.kernel.org
Fixes: 1728ab54b4 ("x86/sgx: Add a page reclaimer")
Reported-by: Vijay Dhanraj <vijay.dhanraj@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org> (kselftest as sanity check)
Link: https://lkml.kernel.org/r/ced01cac1e75f900251b0a4ae1150aa8ebd295ec.1644345232.git.reinette.chatre@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 1f52b0aba6fd37653416375cb8a1ca673acf8d5f upstream.
Changes to the AMD Thresholding sysfs code prevents sysfs writes from
updating the underlying registers once CPU init is completed, i.e.
"threshold_banks" is set.
Allow the registers to be updated if the thresholding interface is
already initialized or if in the init path. Use the "set_lvt_off" value
to indicate if running in the init path, since this value is only set
during init.
Fixes: a037f3ca0e ("x86/mce/amd: Make threshold bank setting hotplug robust")
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220117161328.19148-1-yazen.ghannam@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit b4813539d37fa31fed62cdfab7bd2dd8929c5b2e ]
It is called by the #MC handler which is noinstr.
Fixes
vmlinux.o: warning: objtool: do_machine_check()+0xbd6: call to memset() leaves .noinstr.text section
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211208111343.8130-9-bp@alien8.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 3c7ce80a818fa7950be123cac80cd078e5ac1013 ]
And allow instrumentation inside it because it does calls to other
facilities which will not be tagged noinstr.
Fixes
vmlinux.o: warning: objtool: do_machine_check()+0xc73: call to mce_panic() leaves .noinstr.text section
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211208111343.8130-8-bp@alien8.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 71d5049b053876afbde6c3273250b76935494ab2 ]
Move the switching code into a function so that it can be re-used and
add a global TLB flush. This makes sure that usage of memory which is
not mapped in the trampoline page-table is reliably caught.
Also move the clearing of CR4.PCIDE before the CR3 switch because the
cr4_clear_bits() function will access data not mapped into the
trampoline page-table.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211202153226.22946-4-joro@8bytes.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit de768416b203ac84e02a757b782a32efb388476f ]
A contrived zero-length write, for example, by using write(2):
...
ret = write(fd, str, 0);
...
to the "flags" file causes:
BUG: KASAN: stack-out-of-bounds in flags_write
Write of size 1 at addr ffff888019be7ddf by task writefile/3787
CPU: 4 PID: 3787 Comm: writefile Not tainted 5.16.0-rc7+ #12
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014
due to accessing buf one char before its start.
Prevent such out-of-bounds access.
[ bp: Productize into a proper patch. Link below is the next best
thing because the original mail didn't get archived on lore. ]
Fixes: 0451d14d05 ("EDAC, mce_amd_inj: Modify flags attribute to use string arguments")
Signed-off-by: Zhang Zixun <zhang133010@icloud.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/linux-edac/YcnePfF1OOqoQwrX@zn.tnic/
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit 9c494ca4d3a535f9ca11ad6af1813983c1c6cbdd upstream.
"Stolen memory" is memory set aside for use by an Intel integrated GPU.
The intel_graphics_quirks() early quirk reserves this memory when it is
called for a GPU that appears in the intel_early_ids[] table of integrated
GPUs.
Previously intel_graphics_quirks() was marked as QFLAG_APPLY_ONCE, so it
was called only for the first Intel GPU found. If a discrete GPU happened
to be enumerated first, intel_graphics_quirks() was called for it but not
for any integrated GPU found later. Therefore, stolen memory for such an
integrated GPU was never reserved.
For example, this problem occurs in this Alderlake-P (integrated) + DG2
(discrete) topology where the DG2 is found first, but stolen memory is
associated with the integrated GPU:
- 00:01.0 Bridge
`- 03:00.0 DG2 discrete GPU
- 00:02.0 Integrated GPU (with stolen memory)
Remove the QFLAG_APPLY_ONCE flag and call intel_graphics_quirks() for every
Intel GPU. Reserve stolen memory for the first GPU that appears in
intel_early_ids[].
[bhelgaas: commit log, add code comment, squash in
https://lore.kernel.org/r/20220118190558.2ququ4vdfjuahicm@ldmartin-desk2]
Link: https://lore.kernel.org/r/20220114002843.2083382-1-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 2f5b3514c33fecad4003ce0f22ca9691492d310b upstream.
The memory reservation in arch/x86/platform/efi/efi.c depends on at
least two command line parameters. Put it back later in the boot process
and move efi_memblock_x86_reserve_range() out of early_memory_reserve().
An attempt to fix this was done in
8d48bf8206f7 ("x86/boot: Pull up cmdline preparation and early param parsing")
but that caused other troubles so it got reverted.
The bug this is addressing is:
Dan reports that Anjaneya Chagam can no longer use the efi=nosoftreserve
kernel command line parameter to suppress "soft reservation" behavior.
This is due to the fact that the following call-chain happens at boot:
early_reserve_memory
|-> efi_memblock_x86_reserve_range
|-> efi_fake_memmap_early
which does
if (!efi_soft_reserve_enabled())
return;
and that would have set EFI_MEM_NO_SOFT_RESERVE after having parsed
"nosoftreserve".
However, parse_early_param() gets called *after* it, leading to the boot
cmdline not being taken into account.
See also https://lore.kernel.org/r/e8dd8993c38702ee6dd73b3c11f158617e665607.camel@intel.com
[ bp: Turn into a proper patch. ]
Signed-off-by: Mike Rapoport <rppt@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211213112757.2612-4-bp@alien8.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit fbe6183998546f8896ee0b620ece86deff5a2fd1 upstream.
This reverts commit 8d48bf8206f77aa8687f0e241e901e5197e52423.
It turned out to be a bad idea as it broke supplying mem= cmdline
parameters due to parse_memopt() requiring preparatory work like setting
up the e820 table in e820__memory_setup() in order to be able to exclude
the range specified by mem=.
Pulling that up would've broken Xen PV again, see threads at
https://lkml.kernel.org/r/20210920120421.29276-1-jgross@suse.com
due to xen_memory_setup() needing the first reservations in
early_reserve_memory() - kernel and initrd - to have happened already.
This could be fixed again by having Xen do those reservations itself...
Long story short, revert this and do a simpler fix in a later patch.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211213112757.2612-3-bp@alien8.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit b50db7095fe002fa3e16605546cba66bf1b68a3e upstream.
There are cases that the TSC clocksource is wrongly judged as unstable by
the clocksource watchdog mechanism which tries to validate the TSC against
HPET, PM_TIMER or jiffies. While there is hardly a general reliable way to
check the validity of a watchdog, Thomas Gleixner proposed [1]:
"I'm inclined to lift that requirement when the CPU has:
1) X86_FEATURE_CONSTANT_TSC
2) X86_FEATURE_NONSTOP_TSC
3) X86_FEATURE_NONSTOP_TSC_S3
4) X86_FEATURE_TSC_ADJUST
5) At max. 4 sockets
After two decades of horrors we're finally at a point where TSC seems
to be halfway reliable and less abused by BIOS tinkerers. TSC_ADJUST
was really key as we can now detect even small modifications reliably
and the important point is that we can cure them as well (not pretty
but better than all other options)."
As feature #3 X86_FEATURE_NONSTOP_TSC_S3 only exists on several generations
of Atom processorz, and is always coupled with X86_FEATURE_CONSTANT_TSC
and X86_FEATURE_NONSTOP_TSC, skip checking it, and also be more defensive
to use maximal 2 sockets.
The check is done inside tsc_init() before registering 'tsc-early' and
'tsc' clocksources, as there were cases that both of them had been
wrongly judged as unreliable.
For more background of tsc/watchdog, there is a good summary in [2]
[tglx} Update vs. jiffies:
On systems where the only remaining clocksource aside of TSC is jiffies
there is no way to make this work because that creates a circular
dependency. Jiffies accuracy depends on not missing a periodic timer
interrupt, which is not guaranteed. That could be detected by TSC, but as
TSC is not trusted this cannot be compensated. The consequence is a
circulus vitiosus which results in shutting down TSC and falling back to
the jiffies clocksource which is even more unreliable.
[1]. https://lore.kernel.org/lkml/87eekfk8bd.fsf@nanos.tec.linutronix.de/
[2]. https://lore.kernel.org/lkml/87a6pimt1f.ffs@nanos.tec.linutronix.de/
[ tglx: Refine comment and amend changelog ]
Fixes: 6e3cd95234 ("x86/hpet: Use another crystalball to evaluate HPET usability")
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211117023751.24190-2-feng.tang@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 1d5379d0475419085d3575bd9155f2e558e96390 ]
Properly type the operands being passed to __put_user()/__get_user().
Otherwise, these routines truncate data for dependent instructions
(e.g., INSW) and only read/write one byte.
This has been tested by sending a string with REP OUTSW to a port and
then reading it back in with REP INSW on the same port.
Previous behavior was to only send and receive the first char of the
size. For example, word operations for "abcd" would only read/write
"ac". With change, the full string is now written and read back.
Fixes: f980f9c31a (x86/sev-es: Compile early handler code into kernel image)
Signed-off-by: Michael Sterritt <sterritt@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Marc Orr <marcorr@google.com>
Reviewed-by: Peter Gonda <pgonda@google.com>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Link: https://lkml.kernel.org/r/20211119232757.176201-1-sterritt@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit f3e613e72f66226b3bea1046c1b864f67a3000a4 ]
Explicitly check for MSR_HYPERCALL and MSR_VP_INDEX support when probing
for running as a Hyper-V guest instead of waiting until hyperv_init() to
detect the bogus configuration. Add messages to give the admin a heads
up that they are likely running on a broken virtual machine setup.
At best, silently disabling Hyper-V is confusing and difficult to debug,
e.g. the kernel _says_ it's using all these fancy Hyper-V features, but
always falls back to the native versions. At worst, the half baked setup
will crash/hang the kernel.
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20211104182239.1302956-3-seanjc@google.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit fcb116bc43c8c37c052530ead79872f8b2615711 upstream.
Recently to prevent issues with SECCOMP_RET_KILL and similar signals
being changed before they are delivered SA_IMMUTABLE was added.
Unfortunately this broke debuggers[1][2] which reasonably expect
to be able to trap synchronous SIGTRAP and SIGSEGV even when
the target process is not configured to handle those signals.
Add force_exit_sig and use it instead of force_fatal_sig where
historically the code has directly called do_exit. This has the
implementation benefits of going through the signal exit path
(including generating core dumps) without the danger of allowing
userspace to ignore or change these signals.
This avoids userspace regressions as older kernels exited with do_exit
which debuggers also can not intercept.
In the future is should be possible to improve the quality of
implementation of the kernel by changing some of these force_exit_sig
calls to force_fatal_sig. That can be done where it matters on
a case-by-case basis with careful analysis.
Reported-by: Kyle Huey <me@kylehuey.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
[1] https://lkml.kernel.org/r/CAP045AoMY4xf8aC_4QU_-j7obuEPYgTcnQQP3Yxk=2X90jtpjw@mail.gmail.com
[2] https://lkml.kernel.org/r/20211117150258.GB5403@xsang-OptiPlex-9020
Fixes: 00b06da29cf9 ("signal: Add SA_IMMUTABLE to ensure forced siganls do not get changed")
Fixes: a3616a3c02 ("signal/m68k: Use force_sigsegv(SIGSEGV) in fpsp040_die")
Fixes: 83a1f27ad773 ("signal/powerpc: On swapcontext failure force SIGSEGV")
Fixes: 9bc508cf0791 ("signal/s390: Use force_sigsegv in default_trap_handler")
Fixes: 086ec444f866 ("signal/sparc32: In setup_rt_frame and setup_fram use force_fatal_sig")
Fixes: c317d306d550 ("signal/sparc32: Exit with a fatal signal when try_to_clear_window_buffer fails")
Fixes: 695dd0d634df ("signal/x86: In emulate_vsyscall force a signal instead of calling do_exit")
Fixes: 1fbd60df8a85 ("signal/vm86_32: Properly send SIGSEGV when the vm86 state cannot be saved.")
Fixes: 941edc5bf174 ("exit/syscall_user_dispatch: Send ordinary signals on failure")
Link: https://lkml.kernel.org/r/871r3dqfv8.fsf_-_@email.froward.int.ebiederm.org
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Tested-by: Kyle Huey <khuey@kylehuey.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Thomas Backlund <tmb@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit e21294a7aaae32c5d7154b187113a04db5852e37 upstream.
Now that force_fatal_sig exists it is unnecessary and a bit confusing
to use force_sigsegv in cases where the simpler force_fatal_sig is
wanted. So change every instance we can to make the code clearer.
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Link: https://lkml.kernel.org/r/877de7jrev.fsf@disp2133
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Thomas Backlund <tmb@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 1fbd60df8a852d9c55de8cd3621899cf4c72a5b7 upstream.
Update save_v86_state to always complete all of it's work except
possibly some of the copies to userspace even if save_v86_state takes
a fault. This ensures that the kernel is always in a sane state, even
if userspace has done something silly.
When save_v86_state takes a fault update it to force userspace to take
a SIGSEGV and terminate the userspace application.
As Andy pointed out in review of the first version of this change
there are races between sigaction and the application terinating. Now
that the code has been modified to always perform all save_v86_state's
work (except possibly copying to userspace) those races do not matter
from a kernel perspective.
Forcing the userspace application to terminate (by resetting it's
handler to SIGDFL) is there to keep everything as close to the current
behavior as possible while removing the unique (and difficult to
maintain) use of do_exit.
If this new SIGSEGV happens during handle_signal the next time around
the exit_to_user_mode_loop, SIGSEGV will be delivered to userspace.
All of the callers of handle_vm86_trap and handle_vm86_fault run the
exit_to_user_mode_loop before they return to userspace any signal sent
to the current task during their execution will be delivered to the
current task before that tasks exits to usermode.
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: x86@kernel.org
Cc: H Peter Anvin <hpa@zytor.com>
v1: https://lkml.kernel.org/r/20211020174406.17889-10-ebiederm@xmission.com
Link: https://lkml.kernel.org/r/877de1xcr6.fsf_-_@disp2133
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Thomas Backlund <tmb@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit ac5d272a0ad0419f52e08c91953356e32b075af7 upstream.
The SGX driver maintains a single global free page counter,
sgx_nr_free_pages, that reflects the number of free pages available
across all NUMA nodes. Correspondingly, a list of free pages is
associated with each NUMA node and sgx_nr_free_pages is updated
every time a page is added or removed from any of the free page
lists. The main usage of sgx_nr_free_pages is by the reclaimer
that runs when it (sgx_nr_free_pages) goes below a watermark
to ensure that there are always some free pages available to, for
example, support efficient page faults.
With sgx_nr_free_pages accessed and modified from a few places
it is essential to ensure that these accesses are done safely but
this is not the case. sgx_nr_free_pages is read without any
protection and updated with inconsistent protection by any one
of the spin locks associated with the individual NUMA nodes.
For example:
CPU_A CPU_B
----- -----
spin_lock(&nodeA->lock); spin_lock(&nodeB->lock);
... ...
sgx_nr_free_pages--; /* NOT SAFE */ sgx_nr_free_pages--;
spin_unlock(&nodeA->lock); spin_unlock(&nodeB->lock);
Since sgx_nr_free_pages may be protected by different spin locks
while being modified from different CPUs, the following scenario
is possible:
CPU_A CPU_B
----- -----
{sgx_nr_free_pages = 100}
spin_lock(&nodeA->lock); spin_lock(&nodeB->lock);
sgx_nr_free_pages--; sgx_nr_free_pages--;
/* LOAD sgx_nr_free_pages = 100 */ /* LOAD sgx_nr_free_pages = 100 */
/* sgx_nr_free_pages-- */ /* sgx_nr_free_pages-- */
/* STORE sgx_nr_free_pages = 99 */ /* STORE sgx_nr_free_pages = 99 */
spin_unlock(&nodeA->lock); spin_unlock(&nodeB->lock);
In the above scenario, sgx_nr_free_pages is decremented from two CPUs
but instead of sgx_nr_free_pages ending with a value that is two less
than it started with, it was only decremented by one while the number
of free pages were actually reduced by two. The consequence of
sgx_nr_free_pages not being protected is that its value may not
accurately reflect the actual number of free pages on the system,
impacting the availability of free pages in support of many flows.
The problematic scenario is when the reclaimer does not run because it
believes there to be sufficient free pages while any attempt to allocate
a page fails because there are no free pages available. In the SGX driver
the reclaimer's watermark is only 32 pages so after encountering the
above example scenario 32 times a user space hang is possible when there
are no more free pages because of repeated page faults caused by no
free pages made available.
The following flow was encountered:
asm_exc_page_fault
...
sgx_vma_fault()
sgx_encl_load_page()
sgx_encl_eldu() // Encrypted page needs to be loaded from backing
// storage into newly allocated SGX memory page
sgx_alloc_epc_page() // Allocate a page of SGX memory
__sgx_alloc_epc_page() // Fails, no free SGX memory
...
if (sgx_should_reclaim(SGX_NR_LOW_PAGES)) // Wake reclaimer
wake_up(&ksgxd_waitq);
return -EBUSY; // Return -EBUSY giving reclaimer time to run
return -EBUSY;
return -EBUSY;
return VM_FAULT_NOPAGE;
The reclaimer is triggered in above flow with the following code:
static bool sgx_should_reclaim(unsigned long watermark)
{
return sgx_nr_free_pages < watermark &&
!list_empty(&sgx_active_page_list);
}
In the problematic scenario there were no free pages available yet the
value of sgx_nr_free_pages was above the watermark. The allocation of
SGX memory thus always failed because of a lack of free pages while no
free pages were made available because the reclaimer is never started
because of sgx_nr_free_pages' incorrect value. The consequence was that
user space kept encountering VM_FAULT_NOPAGE that caused the same
address to be accessed repeatedly with the same result.
Change the global free page counter to an atomic type that
ensures simultaneous updates are done safely. While doing so, move
the updating of the variable outside of the spin lock critical
section to which it does not belong.
Cc: stable@vger.kernel.org
Fixes: 901ddbb9ec ("x86/sgx: Add a basic NUMA allocation scheme to sgx_alloc_epc_page()")
Suggested-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lkml.kernel.org/r/a95a40743bbd3f795b465f30922dde7f1ea9e0eb.1637004094.git.reinette.chatre@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 8d48bf8206f77aa8687f0e241e901e5197e52423 upstream.
Dan reports that Anjaneya Chagam can no longer use the efi=nosoftreserve
kernel command line parameter to suppress "soft reservation" behavior.
This is due to the fact that the following call-chain happens at boot:
early_reserve_memory
|-> efi_memblock_x86_reserve_range
|-> efi_fake_memmap_early
which does
if (!efi_soft_reserve_enabled())
return;
and that would have set EFI_MEM_NO_SOFT_RESERVE after having parsed
"nosoftreserve".
However, parse_early_param() gets called *after* it, leading to the boot
cmdline not being taken into account.
Therefore, carve out the command line preparation into a separate
function which does the early param parsing too. So that it all goes
together.
And then call that function before early_reserve_memory() so that the
params would have been parsed by then.
Fixes: 8aa83e6395 ("x86/setup: Call early_reserve_memory() earlier")
Reported-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Anjaneya Chagam <anjaneya.chagam@intel.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/e8dd8993c38702ee6dd73b3c11f158617e665607.camel@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 541ac97186d9ea88491961a46284de3603c914fd upstream.
The size of the exception stacks was increased by the commit in Fixes,
resulting in stack sizes greater than a page in size. The #VC exception
handling was only mapping the first (bottom) page, resulting in an
SEV-ES guest failing to boot.
Make the #VC exception stacks part of the default exception stacks
storage and allocate them with a CONFIG_AMD_MEM_ENCRYPT=y .config. Map
them only when a SEV-ES guest has been detected.
Rip out the custom VC stacks mapping and storage code.
[ bp: Steal and adapt Tom's commit message. ]
Fixes: 7fae4c24a2b8 ("x86: Increase exception stack sizes")
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Tested-by: Brijesh Singh <brijesh.singh@amd.com>
Link: https://lkml.kernel.org/r/YVt1IMjIs7pIZTRR@zn.tnic
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 44b979fa302cab91bdd2cc982823e5c13202cd4e ]
Current code has an explicit check for hitting the task stack guard;
but overflowing any of the other stacks will get you a non-descript
general #DF warning.
Improve matters by using get_stack_info_noinstr() to detetrmine if and
which stack guard page got hit, enabling a better stack warning.
In specific, Michael Wang reported what turned out to be an NMI
exception stack overflow, which is now clearly reported as such:
[] BUG: NMI stack guard page was hit at 0000000085fd977b (stack is 000000003a55b09e..00000000d8cce1a5)
Reported-by: Michael Wang <yun.wang@linux.alibaba.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Wang <yun.wang@linux.alibaba.com>
Link: https://lkml.kernel.org/r/YUTE/NuqnaWbST8n@hirez.programming.kicks-ass.net
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit b968e84b509da593c50dc3db679e1d33de701f78 upstream.
Since commit c8137ace56 ("x86/iopl: Restrict iopl() permission
scope") it's possible to emulate iopl(3) using ioperm(), except for
the CLI/STI usage.
Userspace CLI/STI usage is very dubious (read broken), since any
exception taken during that window can lead to rescheduling anyway (or
worse). The IOPL(2) manpage even states that usage of CLI/STI is highly
discouraged and might even crash the system.
Of course, that won't stop people and HP has the dubious honour of
being the first vendor to be found using this in their hp-health
package.
In order to enable this 'software' to still 'work', have the #GP treat
the CLI/STI instructions as NOPs when iopl(3). Warn the user that
their program is doing dubious things.
Fixes: a24ca99768 ("x86/iopl: Remove legacy IOPL option")
Reported-by: Ondrej Zary <linux@zary.sk>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@kernel.org # v5.5+
Link: https://lkml.kernel.org/r/20210918090641.GD5106@worktop.programming.kicks-ass.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
