A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-25 22:23:14 -04:00
Code Issues Projects Releases Packages Wiki Activity

Merge remote-tracking branch 'remotes/origin/tmp-0453f563cce0' into msm-5.4

Browse source 
* remotes/origin/tmp-0453f563cce0:
  FROMLIST: pwm: Convert period and duty cycle to u64
  ANDROID: gki_defconfig: FW_CACHE to no
  FROMGIT: firmware_class: make firmware caching configurable
  ANDROID: gki_defconfig: removed CONFIG_PM_WAKELOCKS
  ANDROID: gki_defconfig: enable CONFIG_IKHEADERS as m
  ANDROID: update ABI representation
  FROMLIST: reboot: Export reboot_mode
  FROMLIST: iommu/arm-smmu: Update my email address in MODULE_AUTHOR()
  FROMLIST: iommu/arm-smmu: Allow building as a module
  FROMLIST: iommu/arm-smmu: Unregister IOMMU and bus ops on device removal
  FROMLIST: iommu/arm-smmu-v3: Allow building as a module
  FROMLIST: iommu/arm-smmu-v3: Unregister IOMMU and bus ops on device removal
  FROMLIST: iommu/arm-smmu: Prevent forced unbinding of Arm SMMU drivers
  FROMLIST: Revert "iommu/arm-smmu: Make arm-smmu explicitly non-modular"
  FROMLIST: Revert "iommu/arm-smmu: Make arm-smmu-v3 explicitly non-modular"
  FROMLIST: drivers/iommu: Allow IOMMU bus ops to be unregistered
  FROMLIST: iommu/of: Take a ref to the IOMMU driver during ->of_xlate()
  FROMLIST: drivers/iommu: Take a ref to the IOMMU driver prior to ->add_device()
  FROMLIST: PCI: Export pci_ats_disabled() as a GPL symbol to modules
  FROMLIST: iommu/of: Request ACS from the PCI core when configuring IOMMU linkage
  FROMLIST: drivers/iommu: Export core IOMMU API symbols to permit modular drivers
  FROMGIT: of: property: Add device link support for "iommu-map"
  Revert "FROMLIST: iommu: Export core IOMMU functions to kernel modules"
  Revert "FROMLIST: PCI: Export PCI ACS and DMA searching functions to modules"
  Revert "FROMLIST: of: Export of_phandle_iterator_args() to modules"
  ANDROID: initial branch preparations for 5.4
  Linux 5.4
  cramfs: fix usage on non-MTD device
  Revert "Input: synaptics - enable RMI mode for X1 Extreme 2nd Generation"
  afs: Fix large file support
  afs: Fix possible assert with callbacks from yfs servers
  r8152: avoid to call napi_disable twice
  MAINTAINERS: Add myself as maintainer of virtio-vsock
  udp: drop skb extensions before marking skb stateless
  net: rtnetlink: prevent underflows in do_setvfinfo()
  mm/ksm.c: don't WARN if page is still mapped in remove_stable_node()
  mm/memory_hotplug: don't access uninitialized memmaps in shrink_zone_span()
  Revert "fs: ocfs2: fix possible null-pointer dereferences in ocfs2_xa_prepare_entry()"
  can: m_can_platform: remove unnecessary m_can_class_resume() call
  can: m_can_platform: set net_device structure as driver data
  hv_netvsc: Fix send_table offset in case of a host bug
  hv_netvsc: Fix offset usage in netvsc_send_table()
  net-ipv6: IPV6_TRANSPARENT - check NET_RAW prior to NET_ADMIN
  ANDROID: gki_defconfig: disable FUNCTION_TRACER
  sfc: Only cancel the PPS workqueue if it exists
  nfc: port100: handle command failure cleanly
  drm/i915/fbdev: Restore physical addresses for fb_mmap()
  net-sysfs: fix netdev_queue_add_kobject() breakage
  ANDROID: update ABI representation
  ANDROID: add unstripped modules to the distribution
  Revert "drm/amd/display: enable S/G for RAVEN chip"
  drm/amdgpu: disable gfxoff on original raven
  drm/amdgpu: disable gfxoff when using register read interface
  drm/amd/powerplay: correct fine grained dpm force level setting
  drm/amd/powerplay: issue no PPSMC_MSG_GetCurrPkgPwr on unsupported ASICs
  drm/amdgpu: remove experimental flag for Navi14
  r8152: Re-order napi_disable in rtl8152_close
  net: qca_spi: Move reset_count to struct qcaspi
  net: qca_spi: fix receive buffer size check
  net/ibmvnic: Ignore H_FUNCTION return from H_EOI to tolerate XIVE mode
  Revert "net/ibmvnic: Fix EOI when running in XIVE mode"
  net/mlxfw: Verify FSM error code translation doesn't exceed array size
  net/mlx5: Update the list of the PCI supported devices
  net/mlx5: Fix auto group size calculation
  net/mlx5e: Add missing capability bit check for IP-in-IP
  net/mlx5e: Do not use non-EXT link modes in EXT mode
  net/mlx5e: Fix set vf link state error flow
  net/mlx5: DR, Limit STE hash table enlarge based on bytemask
  net/mlx5: DR, Skip rehash for tables with byte mask zero
  net/mlx5: DR, Fix invalid EQ vector number on CQ creation
  net/mlx5e: Reorder mirrer action parsing to check for encap first
  net/mlx5e: Fix ingress rate configuration for representors
  net/mlx5e: Fix error flow cleanup in mlx5e_tc_tun_create_header_ipv4/6
  s390/qeth: return proper errno on IO error
  s390/qeth: fix potential deadlock on workqueue flush
  ipv6/route: return if there is no fib_nh_gw_family
  net-sysfs: Fix reference count leak in rx|netdev_queue_add_kobject
  arm64: uaccess: Remove uaccess_*_not_uao asm macros
  arm64: uaccess: Ensure PAN is re-enabled after unhandled uaccess fault
  BACKPORT: FROMLIST: pwm: Add support for different PWM output types
  ANDROID: SoC: core: Introduce macro SOC_SINGLE_MULTI_EXT
  ANDROID: usb: gadget: configfs: fix compiler warning
  fork: fix pidfd_poll()'s return type
  PM: QoS: Invalidate frequency QoS requests after removal
  virtio_balloon: fix shrinker count
  virtio_balloon: fix shrinker scan number of pages
  mdio_bus: Fix init if CONFIG_RESET_CONTROLLER=n
  Revert "mdio_bus: fix mdio_register_device when RESET_CONTROLLER is disabled"
  net: hns3: fix a wrong reset interrupt status mask
  net: fec: fix clock count mis-match
  net/sched: act_pedit: fix WARN() in the traffic path
  net: phylink: fix link mode modification in PHY mode
  net: phylink: update documentation on create and destroy
  r8169: disable TSO on a single version of RTL8168c to fix performance
  MAINTAINERS: forcedeth: Change Zhu Yanjun's email address
  taprio: don't reject same mqprio settings
  net/tls: enable sk_msg redirect to tls socket egress
  afs: Fix missing timeout reset
  ANDROID: drivers: gpu: drm: add support to batch commands
  gve: fix dma sync bug where not all pages synced
  drm/i915: make pool objects read-only
  mdio_bus: Fix init if CONFIG_RESET_CONTROLLER=n
  nbd:fix memory leak in nbd_get_socket()
  virtio_console: allocate inbufs in add_port() only if it is needed
  virtio_ring: fix return code on DMA mapping fails
  mdio_bus: fix mdio_register_device when RESET_CONTROLLER is disabled
  net/ipv4: fix sysctl max for fib_multipath_hash_policy
  phy: mdio-sun4i: add missed regulator_disable in remove
  net/mlx4_en: Fix wrong limitation for number of TX rings
  net: sched: ensure opts_len <= IP_TUNNEL_OPTS_MAX in act_tunnel_key
  mlxsw: spectrum_router: Fix determining underlay for a GRE tunnel
  net: atm: Reduce the severity of logging in unlink_clip_vcc
  ANDROID: virtio_blk: Remove BUG_ON for discard/zero ops
  drm/i915: Protect request peeking with RCU
  drm/i915/userptr: Try to acquire the page lock around set_page_dirty()
  drm/i915/pmu: "Frequency" is reported as accumulated cycles
  drm/i915: Preload LUTs if the hw isn't currently using them
  drm/i915: Don't oops in dumb_create ioctl if we have no crtcs
  ANDROID: usb: gadget: configfs: Support multiple android instances
  Linux 5.4-rc8
  net/mlx4_en: fix mlx4 ethtool -N insertion
  Revert "hwrng: core - Freeze khwrng thread during suspend"
  ipmr: Fix skb headroom in ipmr_get_route().
  net: hns3: cleanup of stray struct hns3_link_mode_mapping
  net/smc: fix fastopen for non-blocking connect()
  rds: ib: update WR sizes when bringing up connection
  net: gemini: add missed free_netdev
  net: dsa: tag_8021q: Fix dsa_8021q_restore_pvid for an absent pvid
  seg6: fix skb transport_header after decap_and_validate()
  seg6: fix srh pointer in get_srh()
  net: stmmac: Use the correct style for SPDX License Identifier
  octeontx2-af: Use the correct style for SPDX License Identifier
  mm/debug.c: PageAnon() is true for PageKsm() pages
  mm/debug.c: __dump_page() prints an extra line
  mm/page_io.c: do not free shared swap slots
  mm/memory_hotplug: fix try_offline_node()
  mm,thp: recheck each page before collapsing file THP
  mm: slub: really fix slab walking for init_on_free
  mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()
  mm: memcg: switch to css_tryget() in get_mem_cgroup_from_mm()
  lib/xz: fix XZ_DYNALLOC to avoid useless memory reallocations
  mm: fix trying to reclaim unevictable lru page when calling madvise_pageout
  mm: mempolicy: fix the wrong return value and potential pages leak of mbind
  ANDROID: ion: Fix buffer_lock mutex initialization
  Input: synaptics - enable RMI mode for X1 Extreme 2nd Generation
  i2c: core: fix use after free in of_i2c_notify
  i2c: acpi: Force bus speed to 400KHz if a Silead touchscreen is present
  ptp: Extend the test program to check the external time stamp flags.
  mlx5: Reject requests to enable time stamping on both edges.
  igb: Reject requests that fail to enable time stamping on both edges.
  dp83640: Reject requests to enable time stamping on both edges.
  mv88e6xxx: Reject requests to enable time stamping on both edges.
  ptp: Introduce strict checking of external time stamp options.
  renesas: reject unsupported external timestamp flags
  mlx5: reject unsupported external timestamp flags
  igb: reject unsupported external timestamp flags
  dp83640: reject unsupported external timestamp flags
  mv88e6xxx: reject unsupported external timestamp flags
  net: reject PTP periodic output requests with unsupported flags
  ptp: Validate requests to enable time stamping of external signals.
  net: ep93xx_eth: fix mismatch of request_mem_region in remove
  ax88172a: fix information leak on short answers
  selftests: mlxsw: Adjust test to recent changes
  Input: synaptics-rmi4 - destroy F54 poller workqueue when removing
  Input: ff-memless - kill timer in destroy()
  FROMGIT: driver core: Allow device link operations inside sync_state()
  afs: Fix race in commit bulk status fetch
  Revert "ANDROID: Revert "Merge tag 'modules-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux""
  sched/uclamp: Fix incorrect condition
  KVM: Add a comment describing the /dev/kvm no_compat handling
  net: hns3: fix ETS bandwidth validation bug
  net: hns3: reallocate SSU' buffer size when pfc_en changes
  net: hns3: add compatible handling for MAC VLAN switch parameter configuration
  ravb: implement MTU change while device is up
  tipc: add back tipc prefix to log messages
  ANDROID: uid_sys_stats: avoid double accounting of dying threads
  ANDROID: drm: edid: add support for additional CEA extension blocks
  ANDROID: include: uapi: drm: add additional drm mode flags
  ANDROID: drivers: gpu: drm: fix bugs encountered while fuzzing
  ANDROID: driver: gpu: drm: add notifier for panel related events
  ANDROID: include: drm: add the definitions for DP Link Compliance tests
  ANDROID: drm: dsi: add two DSI mode flags for BLLP
  ANDROID: include: drm: support unicasting mipi cmds to dsi ctrls
  ANDROID: include: drm: increase DRM max property count to 64
  ANDROID: drivers: gpu: drm: add support for secure framebuffer
  ANDROID: include: uapi: drm: add additional QCOM modifiers
  ANDROID: build kernels with llvm-nm and llvm-objcopy
  drm/amdgpu: fix null pointer deref in firmware header printing
  rsxx: add missed destroy_workqueue calls in remove
  iocost: check active_list of all the ancestors in iocg_activate()
  rbd: silence bogus uninitialized warning in rbd_object_map_update_finish()
  ceph: increment/decrement dio counter on async requests
  ceph: take the inode lock before acquiring cap refs
  ALSA: usb-audio: Fix incorrect size check for processing/extension units
  KVM: x86/mmu: Take slots_lock when using kvm_mmu_zap_all_fast()
  kbuild: tell sparse about the $ARCH
  sparc: vdso: fix build error of vdso32
  block, bfq: deschedule empty bfq_queues not referred by any process
  mmc: sdhci-of-at91: fix quirk2 overwrite
  ALSA: usb-audio: Fix incorrect NULL check in create_yamaha_midi_quirk()
  slcan: Fix memory leak in error path
  io_uring: ensure registered buffer import returns the IO length
  net: cdc_ncm: Signedness bug in cdc_ncm_set_dgram_size()
  io_uring: Fix getting file for timeout
  ANDROID: scsi: ufs-qcom: Enable BROKEN_CRYPTO quirk flag
  ANDROID: scsi: ufs-hisi: Enable BROKEN_CRYPTO quirk flag
  ANDROID: scsi: ufs: Add quirk bit for controllers that don't play well with inline crypto
  ANDROID: scsi: ufs: UFS init should not require inline crypto
  gpiolib: acpi: Add Terra Pad 1061 to the run_edge_events_on_boot_blacklist
  drm/i915/tgl: MOCS table update
  Revert "drm/i915/ehl: Update MOCS table for EHL"
  slip: Fix memory leak in slip_open error path
  net: usb: qmi_wwan: add support for Foxconn T77W968 LTE modules
  KVM: Forbid /dev/kvm being opened by a compat task when CONFIG_KVM_COMPAT=n
  KVM: X86: Reset the three MSR list number variables to 0 in kvm_init_msr_list()
  selftests: kvm: fix build with glibc >= 2.30
  kvm: x86: disable shattered huge page recovery for PREEMPT_RT.
  drm/sun4i: tcon: Set min division of TCON0_DCLK to 1.
  tools: gpio: Correctly add make dependencies for gpio_utils
  x86/resctrl: Fix potential lockdep warning
  scripts/tools-support-relr.sh: un-quote variables
  Revert "ANDROID: Revert "Merge tag 'modules-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux""
  ALSA: pcm: Fix stream lock usage in snd_pcm_period_elapsed()
  ALSA: usb-audio: not submit urb for stopped endpoint
  can: j1939: warn if resources are still linked on destroy
  can: j1939: j1939_can_recv(): add priv refcounting
  can: j1939: transport: j1939_cancel_active_session(): use hrtimer_try_to_cancel() instead of hrtimer_cancel()
  can: j1939: make sure socket is held as long as session exists
  can: j1939: transport: make sure the aborted session will be deactivated only once
  can: j1939: socket: rework socket locking for j1939_sk_release() and j1939_sk_sendmsg()
  can: j1939: main: j1939_ndev_to_priv(): avoid crash if can_ml_priv is NULL
  can: j1939: move j1939_priv_put() into sk_destruct callback
  can: af_can: export can_sock_destruct()
  perf/core: Fix missing static inline on perf_cgroup_switch()
  perf/core: Consistently fail fork on allocation failures
  perf/aux: Disallow aux_output for kernel events
  perf/core: Reattach a misplaced comment
  perf/aux: Fix the aux_output group inheritance fix
  perf/core: Disallow uncore-cgroup events
  sched/pelt: Fix update of blocked PELT ordering
  sched/core: Avoid spurious lock dependencies
  dpaa2-eth: free already allocated channels on probe defer
  Input: cyttsp4_core - fix use after free bug
  Input: synaptics-rmi4 - clear IRQ enables for F54
  Remove VirtualBox guest shared folders filesystem
  net/smc: fix refcount non-blocking connect() -part 2
  drm/i915: update rawclk also on resume
  x86/quirks: Disable HPET on Intel Coffe Lake platforms
  block: check bi_size overflow before merge
  gpio: bd70528: Use correct unit for debounce times
  gpio: max77620: Fixup debounce delays
  KVM: MMU: Do not treat ZONE_DEVICE pages as being reserved
  KVM: VMX: Introduce pi_is_pir_empty() helper
  KVM: VMX: Do not change PID.NDST when loading a blocked vCPU
  KVM: VMX: Consider PID.PIR to determine if vCPU has pending interrupts
  KVM: VMX: Fix comment to specify PID.ON instead of PIR.ON
  KVM: X86: Fix initialization of MSR lists
  xfrm: release device reference for invalid state
  io_uring: make timeout sequence == 0 mean no sequence
  ntp/y2038: Remove incorrect time_t truncation
  mdio_bus: Fix PTR_ERR applied after initialization to constant
  NFC: nxp-nci: Fix NULL pointer dereference after I2C communication error
  mlxsw: core: Enable devlink reload only on probe
  FROMGIT: of: property: Add device link support for iommus, mboxes and io-channels
  FROMGIT: of: property: Make it easy to add device links from DT properties
  FROMGIT: of: property: Minor style clean up of of_link_to_phandle()
  Revert "ANDROID: of/property: Add device link support for iommus"
  devlink: Add method for time-stamp on reporter's dump
  net: ethernet: dwmac-sun8i: Use the correct function in exit path
  Btrfs: fix log context list corruption after rename exchange operation
  drm/i915/cmdparser: Fix jump whitelist clearing
  iommu/vt-d: Fix QI_DEV_IOTLB_PFSID and QI_DEV_EIOTLB_PFSID macros
  MAINTAINERS: Update for INTEL IOMMU (VT-d) entry
  KVM: fix placement of refcount initialization
  KVM: Fix NULL-ptr deref after kvm_create_vm fails
  ALSA: hda: hdmi - fix pin setup on Tigerlake
  ALSA: hda: Add Cometlake-S PCI ID
  Revert "Revert "sched: Rework pick_next_task() slow-path""
  Linux 5.4-rc7
  lib: Remove select of inexistant GENERIC_IO
  ecryptfs_lookup_interpose(): lower_dentry->d_parent is not stable either
  ecryptfs_lookup_interpose(): lower_dentry->d_inode is not stable
  ecryptfs: fix unlink and rmdir in face of underlying fs modifications
  audit_get_nd(): don't unlock parent too early
  exportfs_decode_fh(): negative pinned may become positive without the parent locked
  cgroup: don't put ERR_PTR() into fc->root
  tcp: remove redundant new line from tcp_event_sk_skb
  devlink: disallow reload operation during device cleanup
  ALSA: usb-audio: Fix missing error check at mixer resolution test
  ixgbe: need_wakeup flag might not be set for Tx
  i40e: need_wakeup flag might not be set for Tx
  igb/igc: use ktime accessors for skb->tstamp
  i40e: Fix for ethtool -m issue on X722 NIC
  iavf: initialize ITRN registers with correct values
  ice: fix potential infinite loop because loop counter being too small
  qede: fix NULL pointer deref in __qede_remove()
  net: fix data-race in neigh_event_send()
  sched: Fix pick_next_task() vs 'change' pattern race
  sched/core: Fix compilation error when cgroup not selected
  cgroup,writeback: don't switch wbs immediately on dead wbs if the memcg is dead
  vsock/virtio: fix sock refcnt holding during the shutdown
  iwlwifi: pcie: don't consider IV len in A-MSDU
  net: ethernet: octeon_mgmt: Account for second possible VLAN header
  pwm: bcm-iproc: Prevent unloading the driver module while in use
  block: drbd: remove a stray unlock in __drbd_send_protocol()
  cpufreq: intel_pstate: Fix invalid EPB setting
  mac80211: fix station inactive_time shortly after boot
  net/fq_impl: Switch to kvmalloc() for memory allocation
  mac80211: fix ieee80211_txq_setup_flows() failure path
  drm/i915/gvt: fix dropping obj reference twice
  ANDROID: Kconfig.gki: Add SND_SOC_COMPRESS
  ipv4: Fix table id reference in fib_sync_down_addr
  ipv6: fixes rt6_probe() and fib6_nh->last_probe init
  net: hns: Fix the stray netpoll locks causing deadlock in NAPI path
  Revert "ANDROID: Kconfig.gki: Add SND_SOC_COMPRESS"
  net: usb: qmi_wwan: add support for DW5821e with eSIM support
  CDC-NCM: handle incomplete transfer of MTU
  nfc: netlink: fix double device reference drop
  ANDROID: Kconfig.gki: Add SND_SOC_COMPRESS
  ceph: return -EINVAL if given fsc mount option on kernel w/o support
  staging: Fix error return code in vboxsf_fill_super()
  staging: vboxsf: fix dereference of pointer dentry before it is null checked
  staging: vboxsf: Remove unused including <linux/version.h>
  x86/speculation/taa: Fix printing of TAA_MSG_SMT on IBRS_ALL CPUs
  xfrm: Fix memleak on xfrm state destroy
  pinctrl: stmfx: fix valid_mask init sequence
  NFC: st21nfca: fix double free
  net: hns3: add compatible handling for command HCLGE_OPC_PF_RST_DONE
  r8169: fix page read in r8168g_mdio_read
  net: stmmac: Fix the TX IOC in xmit path
  net: stmmac: Fix TSO descriptor with Enhanced Addressing
  net: stmmac: Fix the packet count in stmmac_rx()
  net: stmmac: xgmac: Disable MMC interrupts by default
  net: stmmac: xgmac: Disable Flow Control when 1 or more queues are in AV
  net: stmmac: xgmac: Fix AV Feature detection
  net: stmmac: xgmac: Fix TSA selection
  net: stmmac: xgmac: Only get SPH header len if available
  net: stmmac: selftests: Prevent false positives in filter tests
  net: stmmac: xgmac: bitrev32 returns u32
  net: stmmac: gmac4: bitrev32 returns u32
  SMB3: Fix persistent handles reconnect
  drm/radeon: fix si_enable_smc_cac() failed issue
  drm/amdgpu/renoir: move gfxoff handling into gfx9 module
  drm/amdgpu: add warning for GRBM 1-cycle delay issue in gfx9
  drm/amdgpu: add dummy read by engines for some GCVM status registers in gfx10
  drm/amdgpu: register gpu instance before fan boost feature enablment
  drm/amd/swSMU: fix smu workload bit map error
  net/smc: fix ethernet interface refcounting
  selftests/tls: add test for concurrent recv and send
  net/tls: add a TX lock
  net/tls: don't pay attention to sk_write_pending when pushing partial records
  blkcg: make blkcg_print_stat() print stats only for online blkgs
  drm/shmem: Add docbook comments for drm_gem_shmem_object madvise fields
  net: mscc: ocelot: fix __ocelot_rmw_ix prototype
  bpf, offload: Unlock on error in bpf_offload_dev_create()
  net: mscc: ocelot: fix NULL pointer on LAG slave removal
  net: mscc: ocelot: don't handle netdev events for other netdevs
  net/mlx5e: Use correct enum to determine uplink port
  net/mlx5: DR, Fix memory leak during rule creation
  net/mlx5: DR, Fix memory leak in modify action destroy
  net/mlx5e: Fix eswitch debug print of max fdb flow
  HID: wacom: generic: Treat serial number and related fields as unsigned
  drm/amdgpu: add navi14 PCI ID
  Revert "drm/amd/display: setting the DIG_MODE to the correct value."
  drm/amd/display: Add ENGINE_ID_DIGD condition check for Navi14
  drm/amdgpu: dont schedule jobs while in reset
  drm/amdgpu/arcturus: properly set BANK_SELECT and FRAGMENT_SIZE
  arm64: Do not mask out PTE_RDONLY in pte_same()
  ANDROID: nf: IDLETIMER: Fix possible use before initialization in idletimer_resume
  ANDROID: gki_defconfig: enable FW_LOADER configs
  net: bcmgenet: reapply manual settings to the PHY
  Revert "net: bcmgenet: soft reset 40nm EPHYs before MAC init"
  net: bcmgenet: use RGMII loopback for MAC reset
  drm/atomic: fix self-refresh helpers crtc state dereference
  RDMA/hns: Correct the value of srq_desc_size
  RDMA/hns: Correct the value of HNS_ROCE_HEM_CHUNK_LEN
  configfs: calculate the depth of parent item
  IB/hfi1: TID RDMA WRITE should not return IB_WC_RNR_RETRY_EXC_ERR
  IB/hfi1: Calculate flow weight based on QP MTU for TID RDMA
  IB/hfi1: Ensure r_tid_ack is valid before building TID RDMA ACK packet
  IB/hfi1: Ensure full Gen3 speed in a Gen4 system
  ALSA: timer: Fix incorrectly assigned timer instance
  mm: memcontrol: fix network errors from failing __GFP_ATOMIC charges
  mm/memory_hotplug: fix updating the node span
  scripts/gdb: fix debugging modules compiled with hot/cold partitioning
  mm: slab: make page_cgroup_ino() to recognize non-compound slab pages properly
  MAINTAINERS: update information for "MEMORY MANAGEMENT"
  dump_stack: avoid the livelock of the dump_lock
  zswap: add Vitaly to the maintainers list
  mm/page_alloc.c: ratelimit allocation failure warnings more aggressively
  mm/khugepaged: fix might_sleep() warn with CONFIG_HIGHPTE=y
  mm, vmstat: reduce zone->lock holding time by /proc/pagetypeinfo
  mm, vmstat: hide /proc/pagetypeinfo from normal users
  mm/mmu_notifiers: use the right return code for WARN_ON
  ocfs2: protect extent tree in ocfs2_prepare_inode_for_write()
  mm: thp: handle page cache THP correctly in PageTransCompoundMap
  mm, meminit: recalculate pcpu batch and high limits after init completes
  mm/gup_benchmark: fix MAP_HUGETLB case
  mm: memcontrol: fix NULL-ptr deref in percpu stats flush
  MAINTAINERS: update Cavium ThunderX2 maintainers
  ASoC: SOF: topology: Fix bytes control size checks
  ARM: dts: stm32: change joystick pinctrl definition on stm32mp157c-ev1
  ARM: dts: stm32: remove OV5640 pinctrl definition on stm32mp157c-ev1
  ARM: dts: stm32: Fix CAN RAM mapping on stm32mp157c
  ARM: dts: stm32: relax qspi pins slew-rate for stm32mp157
  scsi: core: Handle drivers which set sg_tablesize to zero
  scsi: qla2xxx: fix NPIV tear down process
  scsi: sd_zbc: Fix sd_zbc_complete()
  Documentation: TLS: Add missing counter description
  NFC: fdp: fix incorrect free object
  net: prevent load/store tearing on sk->sk_stamp
  net: qualcomm: rmnet: Fix potential UAF when unregistering
  net/tls: fix sk_msg trim on fallback to copy mode
  mlx4_core: fix wrong comment about the reason of subtract one from the max_cqes
  net: dsa: bcm_sf2: Fix driver removal
  net: sched: prevent duplicate flower rules from tcf_proto destroy race
  net: hns3: Use the correct style for SPDX License Identifier
  bonding: fix state transition issue in link monitoring
  taprio: fix panic while hw offload sched list swap
  FROMLIST: overlayfs: override_creds=off option bypass creator_cred
  FROMLIST: overlayfs: internal getxattr operations without sepolicy checking
  FROMLIST: overlayfs: handle XATTR_NOSECURITY flag for get xattr method
  FROMLIST: Add flags option to get xattr method paired to __vfs_getxattr
  FROMLIST: afs: xattr: use scnprintf
  nvme: change nvme_passthru_cmd64 to explicitly mark rsvd
  drm/i915/gen8+: Add RC6 CTX corruption WA
  drm/i915: Lower RM timeout to avoid DSI hard hangs
  drm/i915/cmdparser: Ignore Length operands during command matching
  drm/i915/cmdparser: Add support for backward jumps
  drm/i915/cmdparser: Use explicit goto for error paths
  drm/i915: Add gen9 BCS cmdparsing
  drm/i915: Allow parsing of unsized batches
  drm/i915: Support ro ppgtt mapped cmdparser shadow buffers
  drm/i915: Add support for mandatory cmdparsing
  drm/i915: Remove Master tables from cmdparser
  drm/i915: Disable Secure Batches for gen6+
  drm/i915: Rename gen7 cmdparser tables
  ALSA: hda: hdmi - add Tigerlake support
  ASoC: max98373: replace gpio_request with devm_gpio_request
  ASoC: stm32: sai: add restriction on mmap support
  watchdog: bd70528: Add MODULE_ALIAS to allow module auto loading
  watchdog: imx_sc_wdt: Pretimeout should follow SCU firmware format
  watchdog: meson: Fix the wrong value of left time
  watchdog: pm8916_wdt: fix pretimeout registration flow
  watchdog: cpwd: fix build regression
  nvme-multipath: fix crash in nvme_mpath_clear_ctrl_paths
  nvme-rdma: fix a segmentation fault during module unload
  clone3: validate stack arguments
  ceph: don't allow copy_file_range when stripe_count != 1
  ceph: don't try to handle hashed dentries in non-O_CREAT atomic_open
  ALSA: hda/ca0132 - Fix possible workqueue stall
  scripts/nsdeps: make sure to pass all module source files to spatch
  perf tools: Fix time sorting
  can: don't use deprecated license identifiers
  can: mcp251x: mcp251x_restart_work_handler(): Fix potential force_quit race condition
  perf tools: Remove unused trace_find_next_event()
  perf scripting engines: Iterate on tep event arrays directly
  FROMGIT: of: property: Skip adding device links to suppliers that aren't devices
  x86/tsc: Respect tsc command line paraemeter for clocksource_tsc_early
  Input: synaptics-rmi4 - remove unused result_bits mask
  Input: synaptics-rmi4 - do not consume more data than we have (F11, F12)
  Input: synaptics-rmi4 - disable the relative position IRQ in the F12 driver
  Input: synaptics-rmi4 - fix video buffer size
  x86/dumpstack/64: Don't evaluate exception stacks before setup
  irq/irqdomain: Update __irq_domain_alloc_fwnode() function documentation
  x86/apic/32: Avoid bogus LDR warnings
  timekeeping/vsyscall: Update VDSO data unconditionally
  drm/i915/dp: Do not switch aux to TBT mode for non-TC ports
  drm/i915: Avoid HPD poll detect triggering a new detect cycle
  can: j1939: transport: j1939_xtp_rx_eoma_one(): Add sanity check for correct total message size
  can: j1939: transport: j1939_session_fresh_new(): make sure EOMA is send with the total message size set
  can: j1939: fix memory leak if filters was set
  can: j1939: fix resource leak of skb on error return paths
  can: ti_hecc: add missing state changes
  can: ti_hecc: properly report state changes
  can: ti_hecc: add fifo overflow error reporting
  can: ti_hecc: release the mailbox a bit earlier
  can: ti_hecc: keep MIM and MD set
  can: ti_hecc: ti_hecc_stop(): stop the CPK on down
  can: ti_hecc: ti_hecc_error(): increase error counters if skb enqueueing via can_rx_offload_queue_sorted() fails
  can: flexcan: increase error counters if skb enqueueing via can_rx_offload_queue_sorted() fails
  can: rx-offload: can_rx_offload_irq_offload_fifo(): continue on error
  can: rx-offload: can_rx_offload_irq_offload_timestamp(): continue on error
  can: rx-offload: can_rx_offload_offload_one(): use ERR_PTR() to propagate error value in case of errors
  can: rx-offload: can_rx_offload_offload_one(): increment rx_fifo_errors on queue overflow or OOM
  can: rx-offload: can_rx_offload_offload_one(): do not increase the skb_queue beyond skb_queue_len_max
  can: rx-offload: can_rx_offload_queue_tail(): fix error handling, avoid skb mem leak
  can: rx-offload: can_rx_offload_queue_sorted(): fix error handling, avoid skb mem leak
  can: xilinx_can: Fix flags field initialization for axi can
  can: c_can: C_CAN: add bus recovery events
  can: c_can: D_CAN: c_can_chip_config(): perform a sofware reset on open
  can: c_can: c_can_poll(): only read status register after status IRQ
  can: peak_usb: report bus recovery as well
  can: peak_usb: fix slab info leak
  can: peak_usb: fix a potential out-of-sync while decoding packets
  can: flexcan: disable completely the ECC mechanism
  can: usb_8dev: fix use-after-free on disconnect
  can: mcba_usb: fix use-after-free on disconnect
  can: gs_usb: gs_can_open(): prevent memory leak
  can: dev: add missing of_node_put() after calling of_get_child_by_name()
  btrfs: un-deprecate ioctls START_SYNC and WAIT_SYNC
  btrfs: save i_size to avoid double evaluation of i_size_read in compress_file_range
  stacktrace: Don't skip first entry on noncurrent tasks
  netfilter: nf_tables_offload: skip EBUSY on chain update
  netfilter: nf_tables: bogus EOPNOTSUPP on basechain update
  bridge: ebtables: don't crash when using dnat target in output chains
  netfilter: nf_tables: fix unexpected EOPNOTSUPP error
  netfilter: nf_tables: Align nft_expr private data to 64-bit
  netfilter: ipset: Fix nla_policies to fully support NL_VALIDATE_STRICT
  netfilter: ipset: Copy the right MAC address in hash:ip,mac IPv6 sets
  netfilter: ipset: Fix an error code in ip_set_sockfn_get()
  dccp: do not leak jiffies on the wire
  net: fec: add missed clk_disable_unprepare in remove
  Documentation: Add ITLB_MULTIHIT documentation
  kvm: x86: mmu: Recovery of shattered NX large pages
  MAINTAINERS: Remove Kevin as maintainer of BMIPS generic platforms
  clk: ti: clkctrl: Fix failed to enable error with double udelay timeout
  clk: ti: dra7-atl-clock: Remove ti_clk_add_alias call
  netfilter: nf_tables_offload: check for register data length mismatches
  intel_th: pci: Add Jasper Lake PCH support
  intel_th: pci: Add Comet Lake PCH support
  intel_th: msu: Fix possible memory leak in mode_store()
  intel_th: msu: Fix overflow in shift of an unsigned int
  intel_th: msu: Fix missing allocation failure check on a kstrndup
  intel_th: msu: Fix an uninitialized mutex
  intel_th: gth: Fix the window switching sequence
  ASoC: hdac_hda: fix race in device removal
  kvm: Add helper function for creating VM worker threads
  kvm: mmu: ITLB_MULTIHIT mitigation
  cpu/speculation: Uninline and export CPU mitigations helpers
  x86/cpu: Add Tremont to the cpu vulnerability whitelist
  x86/bugs: Add ITLB_MULTIHIT bug infrastructure
  fbdev: c2p: Fix link failure on non-inlining
  ALSA: bebob: fix to detect configured source of sampling clock for Focusrite Saffire Pro i/o series
  arm64: dts: zii-ultra: fix ARM regulator GPIO handle
  Revert "gpio: merrifield: Pass irqchip when adding gpiochip"
  Revert "gpio: merrifield: Restore use of irq_base"
  Revert "gpio: merrifield: Move hardware initialization to callback"
  x86/resctrl: Prevent NULL pointer dereference when reading mondata
  idr: Fix idr_alloc_u32 on 32-bit systems
  idr: Fix integer overflow in idr_for_each_entry
  HID: i2c-hid: Send power-on command after reset
  radix tree: Remove radix_tree_iter_find
  idr: Fix idr_get_next_ul race with idr_remove
  powerpc/bpf: Fix tail call implementation
  MIPS: SGI-IP27: fix exception handler replication
  bpf: Change size to u64 for bpf_map_{area_alloc, charge_init}()
  samples/bpf: fix build by setting HAVE_ATTR_TEST to zero
  perf tools: Make usage of test_attr__* optional for perf-sys.h
  bpf: Allow narrow loads of bpf_sysctl fields with offset > 0
  staging: Add VirtualBox guest shared folder (vboxsf) support
  ceph: add missing check in d_revalidate snapdir handling
  ceph: fix RCU case handling in ceph_d_revalidate()
  ceph: fix use-after-free in __ceph_remove_cap()
  bpf, doc: Add Andrii as official reviewer to BPF subsystem
  ARM: sunxi: Fix CPU powerdown on A83T
  ARM: dts: sun8i-a83t-tbs-a711: Fix WiFi resume from suspend
  clk: sunxi-ng: a80: fix the zero'ing of bits 16 and 18
  clk: sunxi: Fix operator precedence in sunxi_divs_clk_setup
  clk: ast2600: Fix enabling of clocks
  clk: at91: avoid sleeping early
  ASoC: rockchip: rockchip_max98090: Enable SHDN to fix headset detection
  ASoC: ti: sdma-pcm: Add back the flags parameter for non standard dma names
  ASoC: SOF: ipc: Fix memory leak in sof_set_get_large_ctrl_data
  ASoC: SOF: Fix memory leak in sof_dfsentry_write
  ASoC: SOF: Intel: hda-stream: fix the CONFIG_ prefix missing
  arm64: dts: imx8mn: fix compatible string for sdma
  arm64: dts: imx8mm: fix compatible string for sdma
  reset: fix reset_control_ops kerneldoc comment
  clk: imx8m: Use SYS_PLL1_800M as intermediate parent of CLK_ARM
  x86/tsx: Add config options to set tsx=on|off|auto
  x86/speculation/taa: Add documentation for TSX Async Abort
  x86/tsx: Add "auto" option to the tsx= cmdline parameter
  kvm/x86: Export MDS_NO=0 to guests when TSX is enabled
  x86/speculation/taa: Add sysfs reporting for TSX Async Abort
  x86/speculation/taa: Add mitigation for TSX Async Abort
  x86/cpu: Add a "tsx=" cmdline option with TSX disabled by default
  x86/cpu: Add a helper function x86_read_arch_cap_msr()
  x86/msr: Add the IA32_TSX_CTRL MSR
  ARM: dts: imx6-logicpd: Re-enable SNVS power key
  iio: adc: stm32-adc: fix stopping dma
  soc: imx: gpc: fix initialiser format
  ARM: dts: imx6qdl-sabreauto: Fix storm of accelerometer interrupts
  Btrfs: fix race leading to metadata space leak after task received signal
  btrfs: tree-checker: Fix wrong check on max devid
  btrfs: Consider system chunk array size for new SYSTEM chunks
  pinctrl: cherryview: Allocate IRQ chip dynamic
  clk: samsung: exynos5420: Preserve PLL configuration during suspend/resume
  arm64: dts: ls1028a: fix a compatible issue
  autofs: fix a leak in autofs_expire_indirect()
  soundwire: slave: fix scanf format
  reset: fix reset_control_get_exclusive kerneldoc comment
  reset: fix reset_control_lookup kerneldoc comment
  reset: fix of_reset_control_get_count kerneldoc comment
  reset: fix of_reset_simple_xlate kerneldoc comment
  ASoC: kirkwood: fix device remove ordering
  ASoC: rsnd: dma: fix SSI9 4/5/6/7 busif dma address
  ASoC: hdmi-codec: drop mutex locking again
  ASoC: kirkwood: fix external clock probe defer
  clk: samsung: exynos542x: Move G3D subsystem clocks to its sub-CMU
  clk: samsung: exynos5433: Fix error paths
  tools: gpio: Use !building_out_of_srctree to determine srctree
  iio: imu: inv_mpu6050: fix no data on MPU6050
  reset: Fix memory leak in reset_control_array_put()
  aio: Fix io_pgetevents() struct __compat_aio_sigset layout
  pinctrl: cherryview: Fix irq_valid_mask calculation
  ASoC: compress: fix unsigned integer overflow check
  ASoC: msm8916-wcd-analog: Fix RX1 selection in RDAC2 MUX
  pinctrl: intel: Avoid potential glitches if pin is in GPIO mode
  soundwire: intel: fix intel_register_dai PDI offsets and numbers
  interconnect: Add locking in icc_set_tag()
  interconnect: qcom: Fix icc_onecell_data allocation
  clocksource/drivers/sh_mtu2: Do not loop using platform_get_irq_by_name()
  fs/namespace.c: fix use-after-free of mount in mnt_warn_timestamp_expiry()
  clocksource/drivers/mediatek: Fix error handling
  soundwire: depend on ACPI || OF
  soundwire: depend on ACPI
  iio: srf04: fix wrong limitation in distance measuring
  iio: imu: adis16480: make sure provided frequency is positive
  cgroup: freezer: call cgroup_enter_frozen() with preemption disabled in ptrace_stop()
  thunderbolt: Drop unnecessary read when writing LC command in Ice Lake
  thunderbolt: Fix lockdep circular locking depedency warning
  thunderbolt: Read DP IN adapter first two dwords in one go
  clk: at91: sam9x60: fix programmable clock
  clk: meson: g12a: set CLK_MUX_ROUND_CLOSEST on the cpu clock muxes
  clk: meson: g12a: fix cpu clock rate setting
  clk: meson: gxbb: let sar_adc_clk_div set the parent clock rate
  XArray: Fix xas_next() with a single entry at 0

Change-Id: I594a629aca56b3ff5a224d65f0d8d79fe4f4f34b
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>
This commit is contained in:
Raghavendra Rao Ananta 2019-11-26 16:57:10 -08:00
commit 43dee37fa9
668 changed files with 115929 additions and 108192 deletions
Download patch file Download diff file Expand all files Collapse all files

2
Documentation/admin-guide/hw-vuln/index.rst
View file

@ -12,3 +12,5 @@ are configurable at compile, boot or run time.
spectre
l1tf
mds
tsx_async_abort
multihit.rst

163
Documentation/admin-guide/hw-vuln/multihit.rst Normal file
View file

@ -0,0 +1,163 @@
iTLB multihit
=============
iTLB multihit is an erratum where some processors may incur a machine check
error, possibly resulting in an unrecoverable CPU lockup, when an
instruction fetch hits multiple entries in the instruction TLB. This can
occur when the page size is changed along with either the physical address
or cache type. A malicious guest running on a virtualized system can
exploit this erratum to perform a denial of service attack.
Affected processors
-------------------
Variations of this erratum are present on most Intel Core and Xeon processor
models. The erratum is not present on:
- non-Intel processors
- Some Atoms (Airmont, Bonnell, Goldmont, GoldmontPlus, Saltwell, Silvermont)
- Intel processors that have the PSCHANGE_MC_NO bit set in the
IA32_ARCH_CAPABILITIES MSR.
Related CVEs
------------
The following CVE entry is related to this issue:
============== =================================================
CVE-2018-12207 Machine Check Error Avoidance on Page Size Change
============== =================================================
Problem
-------
Privileged software, including OS and virtual machine managers (VMM), are in
charge of memory management. A key component in memory management is the control
of the page tables. Modern processors use virtual memory, a technique that creates
the illusion of a very large memory for processors. This virtual space is split
into pages of a given size. Page tables translate virtual addresses to physical
addresses.
To reduce latency when performing a virtual to physical address translation,
processors include a structure, called TLB, that caches recent translations.
There are separate TLBs for instruction (iTLB) and data (dTLB).
Under this errata, instructions are fetched from a linear address translated
using a 4 KB translation cached in the iTLB. Privileged software modifies the
paging structure so that the same linear address using large page size (2 MB, 4
MB, 1 GB) with a different physical address or memory type. After the page
structure modification but before the software invalidates any iTLB entries for
the linear address, a code fetch that happens on the same linear address may
cause a machine-check error which can result in a system hang or shutdown.
Attack scenarios
----------------
Attacks against the iTLB multihit erratum can be mounted from malicious
guests in a virtualized system.
iTLB multihit system information
--------------------------------
The Linux kernel provides a sysfs interface to enumerate the current iTLB
multihit status of the system:whether the system is vulnerable and which
mitigations are active. The relevant sysfs file is:
/sys/devices/system/cpu/vulnerabilities/itlb_multihit
The possible values in this file are:
.. list-table::
* - Not affected
- The processor is not vulnerable.
* - KVM: Mitigation: Split huge pages
- Software changes mitigate this issue.
* - KVM: Vulnerable
- The processor is vulnerable, but no mitigation enabled
Enumeration of the erratum
--------------------------------
A new bit has been allocated in the IA32_ARCH_CAPABILITIES (PSCHANGE_MC_NO) msr
and will be set on CPU's which are mitigated against this issue.
======================================= =========== ===============================
IA32_ARCH_CAPABILITIES MSR Not present Possibly vulnerable,check model
IA32_ARCH_CAPABILITIES[PSCHANGE_MC_NO] '0' Likely vulnerable,check model
IA32_ARCH_CAPABILITIES[PSCHANGE_MC_NO] '1' Not vulnerable
======================================= =========== ===============================
Mitigation mechanism
-------------------------
This erratum can be mitigated by restricting the use of large page sizes to
non-executable pages. This forces all iTLB entries to be 4K, and removes
the possibility of multiple hits.
In order to mitigate the vulnerability, KVM initially marks all huge pages
as non-executable. If the guest attempts to execute in one of those pages,
the page is broken down into 4K pages, which are then marked executable.
If EPT is disabled or not available on the host, KVM is in control of TLB
flushes and the problematic situation cannot happen. However, the shadow
EPT paging mechanism used by nested virtualization is vulnerable, because
the nested guest can trigger multiple iTLB hits by modifying its own
(non-nested) page tables. For simplicity, KVM will make large pages
non-executable in all shadow paging modes.
Mitigation control on the kernel command line and KVM - module parameter
------------------------------------------------------------------------
The KVM hypervisor mitigation mechanism for marking huge pages as
non-executable can be controlled with a module parameter "nx_huge_pages=".
The kernel command line allows to control the iTLB multihit mitigations at
boot time with the option "kvm.nx_huge_pages=".
The valid arguments for these options are:
========== ================================================================
force Mitigation is enabled. In this case, the mitigation implements
non-executable huge pages in Linux kernel KVM module. All huge
pages in the EPT are marked as non-executable.
If a guest attempts to execute in one of those pages, the page is
broken down into 4K pages, which are then marked executable.
off Mitigation is disabled.
auto Enable mitigation only if the platform is affected and the kernel
was not booted with the "mitigations=off" command line parameter.
This is the default option.
========== ================================================================
Mitigation selection guide
--------------------------
1. No virtualization in use
^^^^^^^^^^^^^^^^^^^^^^^^^^^
The system is protected by the kernel unconditionally and no further
action is required.
2. Virtualization with trusted guests
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If the guest comes from a trusted source, you may assume that the guest will
not attempt to maliciously exploit these errata and no further action is
required.
3. Virtualization with untrusted guests
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If the guest comes from an untrusted source, the guest host kernel will need
to apply iTLB multihit mitigation via the kernel command line or kvm
module parameter.

276
Documentation/admin-guide/hw-vuln/tsx_async_abort.rst Normal file
View file

@ -0,0 +1,276 @@
.. SPDX-License-Identifier: GPL-2.0
TAA - TSX Asynchronous Abort
======================================
TAA is a hardware vulnerability that allows unprivileged speculative access to
data which is available in various CPU internal buffers by using asynchronous
aborts within an Intel TSX transactional region.
Affected processors
-------------------
This vulnerability only affects Intel processors that support Intel
Transactional Synchronization Extensions (TSX) when the TAA_NO bit (bit 8)
is 0 in the IA32_ARCH_CAPABILITIES MSR. On processors where the MDS_NO bit
(bit 5) is 0 in the IA32_ARCH_CAPABILITIES MSR, the existing MDS mitigations
also mitigate against TAA.
Whether a processor is affected or not can be read out from the TAA
vulnerability file in sysfs. See :ref:`tsx_async_abort_sys_info`.
Related CVEs
------------
The following CVE entry is related to this TAA issue:
============== ===== ===================================================
CVE-2019-11135 TAA TSX Asynchronous Abort (TAA) condition on some
microprocessors utilizing speculative execution may
allow an authenticated user to potentially enable
information disclosure via a side channel with
local access.
============== ===== ===================================================
Problem
-------
When performing store, load or L1 refill operations, processors write
data into temporary microarchitectural structures (buffers). The data in
those buffers can be forwarded to load operations as an optimization.
Intel TSX is an extension to the x86 instruction set architecture that adds
hardware transactional memory support to improve performance of multi-threaded
software. TSX lets the processor expose and exploit concurrency hidden in an
application due to dynamically avoiding unnecessary synchronization.
TSX supports atomic memory transactions that are either committed (success) or
aborted. During an abort, operations that happened within the transactional region
are rolled back. An asynchronous abort takes place, among other options, when a
different thread accesses a cache line that is also used within the transactional
region when that access might lead to a data race.
Immediately after an uncompleted asynchronous abort, certain speculatively
executed loads may read data from those internal buffers and pass it to dependent
operations. This can be then used to infer the value via a cache side channel
attack.
Because the buffers are potentially shared between Hyper-Threads cross
Hyper-Thread attacks are possible.
The victim of a malicious actor does not need to make use of TSX. Only the
attacker needs to begin a TSX transaction and raise an asynchronous abort
which in turn potenitally leaks data stored in the buffers.
More detailed technical information is available in the TAA specific x86
architecture section: :ref:`Documentation/x86/tsx_async_abort.rst <tsx_async_abort>`.
Attack scenarios
----------------
Attacks against the TAA vulnerability can be implemented from unprivileged
applications running on hosts or guests.
As for MDS, the attacker has no control over the memory addresses that can
be leaked. Only the victim is responsible for bringing data to the CPU. As
a result, the malicious actor has to sample as much data as possible and
then postprocess it to try to infer any useful information from it.
A potential attacker only has read access to the data. Also, there is no direct
privilege escalation by using this technique.
.. _tsx_async_abort_sys_info:
TAA system information
-----------------------
The Linux kernel provides a sysfs interface to enumerate the current TAA status
of mitigated systems. The relevant sysfs file is:
/sys/devices/system/cpu/vulnerabilities/tsx_async_abort
The possible values in this file are:
.. list-table::
* - 'Vulnerable'
- The CPU is affected by this vulnerability and the microcode and kernel mitigation are not applied.
* - 'Vulnerable: Clear CPU buffers attempted, no microcode'
- The system tries to clear the buffers but the microcode might not support the operation.
* - 'Mitigation: Clear CPU buffers'
- The microcode has been updated to clear the buffers. TSX is still enabled.
* - 'Mitigation: TSX disabled'
- TSX is disabled.
* - 'Not affected'
- The CPU is not affected by this issue.
.. _ucode_needed:
Best effort mitigation mode
^^^^^^^^^^^^^^^^^^^^^^^^^^^
If the processor is vulnerable, but the availability of the microcode-based
mitigation mechanism is not advertised via CPUID the kernel selects a best
effort mitigation mode. This mode invokes the mitigation instructions
without a guarantee that they clear the CPU buffers.
This is done to address virtualization scenarios where the host has the
microcode update applied, but the hypervisor is not yet updated to expose the
CPUID to the guest. If the host has updated microcode the protection takes
effect; otherwise a few CPU cycles are wasted pointlessly.
The state in the tsx_async_abort sysfs file reflects this situation
accordingly.
Mitigation mechanism
--------------------
The kernel detects the affected CPUs and the presence of the microcode which is
required. If a CPU is affected and the microcode is available, then the kernel
enables the mitigation by default.
The mitigation can be controlled at boot time via a kernel command line option.
See :ref:`taa_mitigation_control_command_line`.
.. _virt_mechanism:
Virtualization mitigation
^^^^^^^^^^^^^^^^^^^^^^^^^
Affected systems where the host has TAA microcode and TAA is mitigated by
having disabled TSX previously, are not vulnerable regardless of the status
of the VMs.
In all other cases, if the host either does not have the TAA microcode or
the kernel is not mitigated, the system might be vulnerable.
.. _taa_mitigation_control_command_line:
Mitigation control on the kernel command line
---------------------------------------------
The kernel command line allows to control the TAA mitigations at boot time with
the option "tsx_async_abort=". The valid arguments for this option are:
============ =============================================================
off This option disables the TAA mitigation on affected platforms.
If the system has TSX enabled (see next parameter) and the CPU
is affected, the system is vulnerable.
full TAA mitigation is enabled. If TSX is enabled, on an affected
system it will clear CPU buffers on ring transitions. On
systems which are MDS-affected and deploy MDS mitigation,
TAA is also mitigated. Specifying this option on those
systems will have no effect.
full,nosmt The same as tsx_async_abort=full, with SMT disabled on
vulnerable CPUs that have TSX enabled. This is the complete
mitigation. When TSX is disabled, SMT is not disabled because
CPU is not vulnerable to cross-thread TAA attacks.
============ =============================================================
Not specifying this option is equivalent to "tsx_async_abort=full".
The kernel command line also allows to control the TSX feature using the
parameter "tsx=" on CPUs which support TSX control. MSR_IA32_TSX_CTRL is used
to control the TSX feature and the enumeration of the TSX feature bits (RTM
and HLE) in CPUID.
The valid options are:
============ =============================================================
off Disables TSX on the system.
Note that this option takes effect only on newer CPUs which are
not vulnerable to MDS, i.e., have MSR_IA32_ARCH_CAPABILITIES.MDS_NO=1
and which get the new IA32_TSX_CTRL MSR through a microcode
update. This new MSR allows for the reliable deactivation of
the TSX functionality.
on Enables TSX.
Although there are mitigations for all known security
vulnerabilities, TSX has been known to be an accelerator for
several previous speculation-related CVEs, and so there may be
unknown security risks associated with leaving it enabled.
auto Disables TSX if X86_BUG_TAA is present, otherwise enables TSX
on the system.
============ =============================================================
Not specifying this option is equivalent to "tsx=off".
The following combinations of the "tsx_async_abort" and "tsx" are possible. For
affected platforms tsx=auto is equivalent to tsx=off and the result will be:
========= ========================== =========================================
tsx=on tsx_async_abort=full The system will use VERW to clear CPU
buffers. Cross-thread attacks are still
possible on SMT machines.
tsx=on tsx_async_abort=full,nosmt As above, cross-thread attacks on SMT
mitigated.
tsx=on tsx_async_abort=off The system is vulnerable.
tsx=off tsx_async_abort=full TSX might be disabled if microcode
provides a TSX control MSR. If so,
system is not vulnerable.
tsx=off tsx_async_abort=full,nosmt Ditto
tsx=off tsx_async_abort=off ditto
========= ========================== =========================================
For unaffected platforms "tsx=on" and "tsx_async_abort=full" does not clear CPU
buffers. For platforms without TSX control (MSR_IA32_ARCH_CAPABILITIES.MDS_NO=0)
"tsx" command line argument has no effect.
For the affected platforms below table indicates the mitigation status for the
combinations of CPUID bit MD_CLEAR and IA32_ARCH_CAPABILITIES MSR bits MDS_NO
and TSX_CTRL_MSR.
======= ========= ============= ========================================
MDS_NO MD_CLEAR TSX_CTRL_MSR Status
======= ========= ============= ========================================
0 0 0 Vulnerable (needs microcode)
0 1 0 MDS and TAA mitigated via VERW
1 1 0 MDS fixed, TAA vulnerable if TSX enabled
because MD_CLEAR has no meaning and
VERW is not guaranteed to clear buffers
1 X 1 MDS fixed, TAA can be mitigated by
VERW or TSX_CTRL_MSR
======= ========= ============= ========================================
Mitigation selection guide
--------------------------
1. Trusted userspace and guests
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If all user space applications are from a trusted source and do not execute
untrusted code which is supplied externally, then the mitigation can be
disabled. The same applies to virtualized environments with trusted guests.
2. Untrusted userspace and guests
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If there are untrusted applications or guests on the system, enabling TSX
might allow a malicious actor to leak data from the host or from other
processes running on the same physical core.
If the microcode is available and the TSX is disabled on the host, attacks
are prevented in a virtualized environment as well, even if the VMs do not
explicitly enable the mitigation.
.. _taa_default_mitigations:
Default mitigations
-------------------
The kernel's default action for vulnerable processors is:
- Deploy TSX disable mitigation (tsx_async_abort=full tsx=off).

92
Documentation/admin-guide/kernel-parameters.txt
View file

@ -2059,6 +2059,25 @@
KVM MMU at runtime.
Default is 0 (off)
kvm.nx_huge_pages=
[KVM] Controls the software workaround for the
X86_BUG_ITLB_MULTIHIT bug.
force : Always deploy workaround.
off : Never deploy workaround.
auto : Deploy workaround based on the presence of
X86_BUG_ITLB_MULTIHIT.
Default is 'auto'.
If the software workaround is enabled for the host,
guests do need not to enable it for nested guests.
kvm.nx_huge_pages_recovery_ratio=
[KVM] Controls how many 4KiB pages are periodically zapped
back to huge pages. 0 disables the recovery, otherwise if
the value is N KVM will zap 1/Nth of the 4KiB pages every
minute. The default is 60.
kvm-amd.nested= [KVM,AMD] Allow nested virtualization in KVM/SVM.
Default is 1 (enabled)
@ -2640,6 +2659,13 @@
ssbd=force-off [ARM64]
l1tf=off [X86]
mds=off [X86]
tsx_async_abort=off [X86]
kvm.nx_huge_pages=off [X86]
Exceptions:
This does not have any effect on
kvm.nx_huge_pages when
kvm.nx_huge_pages=force.
auto (default)
Mitigate all CPU vulnerabilities, but leave SMT
@ -2655,6 +2681,7 @@
be fully mitigated, even if it means losing SMT.
Equivalent to: l1tf=flush,nosmt [X86]
mds=full,nosmt [X86]
tsx_async_abort=full,nosmt [X86]
mminit_loglevel=
[KNL] When CONFIG_DEBUG_MEMORY_INIT is set, this
@ -4858,6 +4885,71 @@
interruptions from clocksource watchdog are not
acceptable).
tsx= [X86] Control Transactional Synchronization
Extensions (TSX) feature in Intel processors that
support TSX control.
This parameter controls the TSX feature. The options are:
on - Enable TSX on the system. Although there are
mitigations for all known security vulnerabilities,
TSX has been known to be an accelerator for
several previous speculation-related CVEs, and
so there may be unknown security risks associated
with leaving it enabled.
off - Disable TSX on the system. (Note that this
option takes effect only on newer CPUs which are
not vulnerable to MDS, i.e., have
MSR_IA32_ARCH_CAPABILITIES.MDS_NO=1 and which get
the new IA32_TSX_CTRL MSR through a microcode
update. This new MSR allows for the reliable
deactivation of the TSX functionality.)
auto - Disable TSX if X86_BUG_TAA is present,
otherwise enable TSX on the system.
Not specifying this option is equivalent to tsx=off.
See Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
for more details.
tsx_async_abort= [X86,INTEL] Control mitigation for the TSX Async
Abort (TAA) vulnerability.
Similar to Micro-architectural Data Sampling (MDS)
certain CPUs that support Transactional
Synchronization Extensions (TSX) are vulnerable to an
exploit against CPU internal buffers which can forward
information to a disclosure gadget under certain
conditions.
In vulnerable processors, the speculatively forwarded
data can be used in a cache side channel attack, to
access data to which the attacker does not have direct
access.
This parameter controls the TAA mitigation. The
options are:
full - Enable TAA mitigation on vulnerable CPUs
if TSX is enabled.
full,nosmt - Enable TAA mitigation and disable SMT on
vulnerable CPUs. If TSX is disabled, SMT
is not disabled because CPU is not
vulnerable to cross-thread TAA attacks.
off - Unconditionally disable TAA mitigation
Not specifying this option is equivalent to
tsx_async_abort=full. On CPUs which are MDS affected
and deploy MDS mitigation, TAA mitigation is not
required and doesn't provide any additional
mitigation.
For details see:
Documentation/admin-guide/hw-vuln/tsx_async_abort.rst
turbografx.map[2|3]= [HW,JOY]
TurboGraFX parallel port interface
Format: