Changes in 5.10.20
vmlinux.lds.h: add DWARF v5 sections
vdpa/mlx5: fix param validation in mlx5_vdpa_get_config()
debugfs: be more robust at handling improper input in debugfs_lookup()
debugfs: do not attempt to create a new file before the filesystem is initalized
scsi: libsas: docs: Remove notify_ha_event()
scsi: qla2xxx: Fix mailbox Ch erroneous error
kdb: Make memory allocations more robust
w1: w1_therm: Fix conversion result for negative temperatures
PCI: qcom: Use PHY_REFCLK_USE_PAD only for ipq8064
PCI: Decline to resize resources if boot config must be preserved
virt: vbox: Do not use wait_event_interruptible when called from kernel context
bfq: Avoid false bfq queue merging
ALSA: usb-audio: Fix PCM buffer allocation in non-vmalloc mode
MIPS: vmlinux.lds.S: add missing PAGE_ALIGNED_DATA() section
vmlinux.lds.h: Define SANTIZER_DISCARDS with CONFIG_GCOV_KERNEL=y
random: fix the RNDRESEEDCRNG ioctl
ALSA: pcm: Call sync_stop at disconnection
ALSA: pcm: Assure sync with the pending stop operation at suspend
ALSA: pcm: Don't call sync_stop if it hasn't been stopped
drm/i915/gt: One more flush for Baytrail clear residuals
ath10k: Fix error handling in case of CE pipe init failure
Bluetooth: btqcomsmd: Fix a resource leak in error handling paths in the probe function
Bluetooth: hci_uart: Fix a race for write_work scheduling
Bluetooth: Fix initializing response id after clearing struct
arm64: dts: renesas: beacon kit: Fix choppy Bluetooth Audio
arm64: dts: renesas: beacon: Fix audio-1.8V pin enable
ARM: dts: exynos: correct PMIC interrupt trigger level on Artik 5
ARM: dts: exynos: correct PMIC interrupt trigger level on Monk
ARM: dts: exynos: correct PMIC interrupt trigger level on Rinato
ARM: dts: exynos: correct PMIC interrupt trigger level on Spring
ARM: dts: exynos: correct PMIC interrupt trigger level on Arndale Octa
ARM: dts: exynos: correct PMIC interrupt trigger level on Odroid XU3 family
arm64: dts: exynos: correct PMIC interrupt trigger level on TM2
arm64: dts: exynos: correct PMIC interrupt trigger level on Espresso
memory: mtk-smi: Fix PM usage counter unbalance in mtk_smi ops
Bluetooth: hci_qca: Fix memleak in qca_controller_memdump
staging: vchiq: Fix bulk userdata handling
staging: vchiq: Fix bulk transfers on 64-bit builds
arm64: dts: qcom: msm8916-samsung-a5u: Fix iris compatible
net: stmmac: dwmac-meson8b: fix enabling the timing-adjustment clock
bpf: Add bpf_patch_call_args prototype to include/linux/bpf.h
bpf: Avoid warning when re-casting __bpf_call_base into __bpf_call_base_args
firmware: arm_scmi: Fix call site of scmi_notification_exit
arm64: dts: allwinner: A64: properly connect USB PHY to port 0
arm64: dts: allwinner: H6: properly connect USB PHY to port 0
arm64: dts: allwinner: Drop non-removable from SoPine/LTS SD card
arm64: dts: allwinner: H6: Allow up to 150 MHz MMC bus frequency
arm64: dts: allwinner: A64: Limit MMC2 bus frequency to 150 MHz
arm64: dts: qcom: msm8916-samsung-a2015: Fix sensors
cpufreq: brcmstb-avs-cpufreq: Free resources in error path
cpufreq: brcmstb-avs-cpufreq: Fix resource leaks in ->remove()
arm64: dts: rockchip: rk3328: Add clock_in_out property to gmac2phy node
ACPICA: Fix exception code class checks
usb: gadget: u_audio: Free requests only after callback
arm64: dts: qcom: sdm845-db845c: Fix reset-pin of ov8856 node
soc: qcom: socinfo: Fix an off by one in qcom_show_pmic_model()
soc: ti: pm33xx: Fix some resource leak in the error handling paths of the probe function
staging: media: atomisp: Fix size_t format specifier in hmm_alloc() debug statemenet
Bluetooth: drop HCI device reference before return
Bluetooth: Put HCI device if inquiry procedure interrupts
memory: ti-aemif: Drop child node when jumping out loop
ARM: dts: Configure missing thermal interrupt for 4430
usb: dwc2: Do not update data length if it is 0 on inbound transfers
usb: dwc2: Abort transaction after errors with unknown reason
usb: dwc2: Make "trimming xfer length" a debug message
staging: rtl8723bs: wifi_regd.c: Fix incorrect number of regulatory rules
x86/MSR: Filter MSR writes through X86_IOC_WRMSR_REGS ioctl too
arm64: dts: renesas: beacon: Fix EEPROM compatible value
can: mcp251xfd: mcp251xfd_probe(): fix errata reference
ARM: dts: armada388-helios4: assign pinctrl to LEDs
ARM: dts: armada388-helios4: assign pinctrl to each fan
arm64: dts: armada-3720-turris-mox: rename u-boot mtd partition to a53-firmware
opp: Correct debug message in _opp_add_static_v2()
Bluetooth: btusb: Fix memory leak in btusb_mtk_wmt_recv
soc: qcom: ocmem: don't return NULL in of_get_ocmem
arm64: dts: msm8916: Fix reserved and rfsa nodes unit address
arm64: dts: meson: fix broken wifi node for Khadas VIM3L
iwlwifi: mvm: set enabled in the PPAG command properly
ARM: s3c: fix fiq for clang IAS
optee: simplify i2c access
staging: wfx: fix possible panic with re-queued frames
ARM: at91: use proper asm syntax in pm_suspend
ath10k: Fix suspicious RCU usage warning in ath10k_wmi_tlv_parse_peer_stats_info()
ath10k: Fix lockdep assertion warning in ath10k_sta_statistics
ath11k: fix a locking bug in ath11k_mac_op_start()
soc: aspeed: snoop: Add clock control logic
iwlwifi: mvm: fix the type we use in the PPAG table validity checks
iwlwifi: mvm: store PPAG enabled/disabled flag properly
iwlwifi: mvm: send stored PPAG command instead of local
iwlwifi: mvm: assign SAR table revision to the command later
iwlwifi: mvm: don't check if CSA event is running before removing
bpf_lru_list: Read double-checked variable once without lock
iwlwifi: pnvm: set the PNVM again if it was already loaded
iwlwifi: pnvm: increment the pointer before checking the TLV
ath9k: fix data bus crash when setting nf_override via debugfs
selftests/bpf: Convert test_xdp_redirect.sh to bash
ibmvnic: Set to CLOSED state even on error
bnxt_en: reverse order of TX disable and carrier off
bnxt_en: Fix devlink info's stored fw.psid version format.
xen/netback: fix spurious event detection for common event case
dpaa2-eth: fix memory leak in XDP_REDIRECT
net: phy: consider that suspend2ram may cut off PHY power
net/mlx5e: Don't change interrupt moderation params when DIM is enabled
net/mlx5e: Change interrupt moderation channel params also when channels are closed
net/mlx5: Fix health error state handling
net/mlx5e: Replace synchronize_rcu with synchronize_net
net/mlx5e: kTLS, Use refcounts to free kTLS RX priv context
net/mlx5: Disable devlink reload for multi port slave device
net/mlx5: Disallow RoCE on multi port slave device
net/mlx5: Disallow RoCE on lag device
net/mlx5: Disable devlink reload for lag devices
net/mlx5e: CT: manage the lifetime of the ct entry object
net/mlx5e: Check tunnel offload is required before setting SWP
mac80211: fix potential overflow when multiplying to u32 integers
libbpf: Ignore non function pointer member in struct_ops
bpf: Fix an unitialized value in bpf_iter
bpf, devmap: Use GFP_KERNEL for xdp bulk queue allocation
bpf: Fix bpf_fib_lookup helper MTU check for SKB ctx
selftests: mptcp: fix ACKRX debug message
tcp: fix SO_RCVLOWAT related hangs under mem pressure
net: axienet: Handle deferred probe on clock properly
cxgb4/chtls/cxgbit: Keeping the max ofld immediate data size same in cxgb4 and ulds
b43: N-PHY: Fix the update of coef for the PHY revision >= 3case
bpf: Clear subreg_def for global function return values
ibmvnic: add memory barrier to protect long term buffer
ibmvnic: skip send_request_unmap for timeout reset
net: dsa: felix: perform teardown in reverse order of setup
net: dsa: felix: don't deinitialize unused ports
net: phy: mscc: adding LCPLL reset to VSC8514
net: amd-xgbe: Reset the PHY rx data path when mailbox command timeout
net: amd-xgbe: Fix NETDEV WATCHDOG transmit queue timeout warning
net: amd-xgbe: Reset link when the link never comes back
net: amd-xgbe: Fix network fluctuations when using 1G BELFUSE SFP
net: mvneta: Remove per-cpu queue mapping for Armada 3700
net: enetc: fix destroyed phylink dereference during unbind
tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
tty: implement read_iter
fbdev: aty: SPARC64 requires FB_ATY_CT
drm/gma500: Fix error return code in psb_driver_load()
gma500: clean up error handling in init
drm/fb-helper: Add missed unlocks in setcmap_legacy()
drm/panel: mantix: Tweak init sequence
drm/vc4: hdmi: Take into account the clock doubling flag in atomic_check
crypto: sun4i-ss - linearize buffers content must be kept
crypto: sun4i-ss - fix kmap usage
crypto: arm64/aes-ce - really hide slower algos when faster ones are enabled
hwrng: ingenic - Fix a resource leak in an error handling path
media: allegro: Fix use after free on error
kcsan: Rewrite kcsan_prandom_u32_max() without prandom_u32_state()
drm: rcar-du: Fix PM reference leak in rcar_cmm_enable()
drm: rcar-du: Fix crash when using LVDS1 clock for CRTC
drm: rcar-du: Fix the return check of of_parse_phandle and of_find_device_by_node
drm/amdgpu: Fix macro name _AMDGPU_TRACE_H_ in preprocessor if condition
MIPS: c-r4k: Fix section mismatch for loongson2_sc_init
MIPS: lantiq: Explicitly compare LTQ_EBU_PCC_ISTAT against 0
drm/virtio: make sure context is created in gem open
drm/fourcc: fix Amlogic format modifier masks
media: ipu3-cio2: Build only for x86
media: i2c: ov5670: Fix PIXEL_RATE minimum value
media: imx: Unregister csc/scaler only if registered
media: imx: Fix csc/scaler unregister
media: mtk-vcodec: fix error return code in vdec_vp9_decode()
media: camss: missing error code in msm_video_register()
media: vsp1: Fix an error handling path in the probe function
media: em28xx: Fix use-after-free in em28xx_alloc_urbs
media: media/pci: Fix memleak in empress_init
media: tm6000: Fix memleak in tm6000_start_stream
media: aspeed: fix error return code in aspeed_video_setup_video()
ASoC: cs42l56: fix up error handling in probe
ASoC: qcom: qdsp6: Move frontend AIFs to q6asm-dai
evm: Fix memleak in init_desc
crypto: bcm - Rename struct device_private to bcm_device_private
sched/fair: Avoid stale CPU util_est value for schedutil in task dequeue
drm/sun4i: tcon: fix inverted DCLK polarity
media: imx7: csi: Fix regression for parallel cameras on i.MX6UL
media: imx7: csi: Fix pad link validation
media: ti-vpe: cal: fix write to unallocated memory
MIPS: properly stop .eh_frame generation
MIPS: Compare __SYNC_loongson3_war against 0
drm/tegra: Fix reference leak when pm_runtime_get_sync() fails
drm/amdgpu: toggle on DF Cstate after finishing xgmi injection
bsg: free the request before return error code
macintosh/adb-iop: Use big-endian autopoll mask
drm/amd/display: Fix 10/12 bpc setup in DCE output bit depth reduction.
drm/amd/display: Fix HDMI deep color output for DCE 6-11.
media: software_node: Fix refcounts in software_node_get_next_child()
media: lmedm04: Fix misuse of comma
media: vidtv: psi: fix missing crc for PMT
media: atomisp: Fix a buffer overflow in debug code
media: qm1d1c0042: fix error return code in qm1d1c0042_init()
media: cx25821: Fix a bug when reallocating some dma memory
media: mtk-vcodec: fix argument used when DEBUG is defined
media: pxa_camera: declare variable when DEBUG is defined
media: uvcvideo: Accept invalid bFormatIndex and bFrameIndex values
sched/eas: Don't update misfit status if the task is pinned
f2fs: compress: fix potential deadlock
ASoC: qcom: lpass-cpu: Remove bit clock state check
ASoC: SOF: Intel: hda: cancel D0i3 work during runtime suspend
perf/arm-cmn: Fix PMU instance naming
perf/arm-cmn: Move IRQs when migrating context
mtd: parser: imagetag: fix error codes in bcm963xx_parse_imagetag_partitions()
crypto: talitos - Work around SEC6 ERRATA (AES-CTR mode data size error)
crypto: talitos - Fix ctr(aes) on SEC1
drm/nouveau: bail out of nouveau_channel_new if channel init fails
mm: proc: Invalidate TLB after clearing soft-dirty page state
ata: ahci_brcm: Add back regulators management
ASoC: cpcap: fix microphone timeslot mask
ASoC: codecs: add missing max_register in regmap config
mtd: parsers: afs: Fix freeing the part name memory in failure
f2fs: fix to avoid inconsistent quota data
drm/amdgpu: Prevent shift wrapping in amdgpu_read_mask()
f2fs: fix a wrong condition in __submit_bio
ASoC: qcom: Fix typo error in HDMI regmap config callbacks
KVM: nSVM: Don't strip host's C-bit from guest's CR3 when reading PDPTRs
drm/mediatek: Check if fb is null
Drivers: hv: vmbus: Avoid use-after-free in vmbus_onoffer_rescind()
ASoC: Intel: sof_sdw: add missing TGL_HDMI quirk for Dell SKU 0A5E
ASoC: Intel: sof_sdw: add missing TGL_HDMI quirk for Dell SKU 0A3E
locking/lockdep: Avoid unmatched unlock
ASoC: qcom: lpass: Fix i2s ctl register bit map
ASoC: rt5682: Fix panic in rt5682_jack_detect_handler happening during system shutdown
ASoC: SOF: debug: Fix a potential issue on string buffer termination
btrfs: clarify error returns values in __load_free_space_cache
btrfs: fix double accounting of ordered extent for subpage case in btrfs_invalidapge
KVM: x86: Restore all 64 bits of DR6 and DR7 during RSM on x86-64
s390/zcrypt: return EIO when msg retry limit reached
drm/vc4: hdmi: Move hdmi reset to bind
drm/vc4: hdmi: Fix register offset with longer CEC messages
drm/vc4: hdmi: Fix up CEC registers
drm/vc4: hdmi: Restore cec physical address on reconnect
drm/vc4: hdmi: Compute the CEC clock divider from the clock rate
drm/vc4: hdmi: Update the CEC clock divider on HSM rate change
drm/lima: fix reference leak in lima_pm_busy
drm/dp_mst: Don't cache EDIDs for physical ports
hwrng: timeriomem - Fix cooldown period calculation
crypto: ecdh_helper - Ensure 'len >= secret.len' in decode_key()
io_uring: fix possible deadlock in io_uring_poll
nvmet-tcp: fix receive data digest calculation for multiple h2cdata PDUs
nvmet-tcp: fix potential race of tcp socket closing accept_work
nvme-multipath: set nr_zones for zoned namespaces
nvmet: remove extra variable in identify ns
nvmet: set status to 0 in case for invalid nsid
ASoC: SOF: sof-pci-dev: add missing Up-Extreme quirk
ima: Free IMA measurement buffer on error
ima: Free IMA measurement buffer after kexec syscall
ASoC: simple-card-utils: Fix device module clock
fs/jfs: fix potential integer overflow on shift of a int
jffs2: fix use after free in jffs2_sum_write_data()
ubifs: Fix memleak in ubifs_init_authentication
ubifs: replay: Fix high stack usage, again
ubifs: Fix error return code in alloc_wbufs()
irqchip/imx: IMX_INTMUX should not default to y, unconditionally
smp: Process pending softirqs in flush_smp_call_function_from_idle()
drm/amdgpu/display: remove hdcp_srm sysfs on device removal
capabilities: Don't allow writing ambiguous v3 file capabilities
HSI: Fix PM usage counter unbalance in ssi_hw_init
power: supply: cpcap: Add missing IRQF_ONESHOT to fix regression
clk: meson: clk-pll: fix initializing the old rate (fallback) for a PLL
clk: meson: clk-pll: make "ret" a signed integer
clk: meson: clk-pll: propagate the error from meson_clk_pll_set_rate()
selftests/powerpc: Make the test check in eeh-basic.sh posix compliant
regulator: qcom-rpmh-regulator: add pm8009-1 chip revision
arm64: dts: qcom: qrb5165-rb5: fix pm8009 regulators
quota: Fix memory leak when handling corrupted quota file
i2c: iproc: handle only slave interrupts which are enabled
i2c: iproc: update slave isr mask (ISR_MASK_SLAVE)
i2c: iproc: handle master read request
spi: cadence-quadspi: Abort read if dummy cycles required are too many
clk: sunxi-ng: h6: Fix CEC clock
clk: renesas: r8a779a0: Remove non-existent S2 clock
clk: renesas: r8a779a0: Fix parent of CBFUSA clock
HID: core: detect and skip invalid inputs to snto32()
RDMA/siw: Fix handling of zero-sized Read and Receive Queues.
dmaengine: fsldma: Fix a resource leak in the remove function
dmaengine: fsldma: Fix a resource leak in an error handling path of the probe function
dmaengine: owl-dma: Fix a resource leak in the remove function
dmaengine: hsu: disable spurious interrupt
mfd: bd9571mwv: Use devm_mfd_add_devices()
power: supply: cpcap-charger: Fix missing power_supply_put()
power: supply: cpcap-battery: Fix missing power_supply_put()
power: supply: cpcap-charger: Fix power_supply_put on null battery pointer
fdt: Properly handle "no-map" field in the memory region
of/fdt: Make sure no-map does not remove already reserved regions
RDMA/rtrs: Extend ibtrs_cq_qp_create
RDMA/rtrs-srv: Release lock before call into close_sess
RDMA/rtrs-srv: Use sysfs_remove_file_self for disconnect
RDMA/rtrs-clt: Set mininum limit when create QP
RDMA/rtrs: Call kobject_put in the failure path
RDMA/rtrs-srv: Fix missing wr_cqe
RDMA/rtrs-clt: Refactor the failure cases in alloc_clt
RDMA/rtrs-srv: Init wr_cnt as 1
power: reset: at91-sama5d2_shdwc: fix wkupdbc mask
rtc: s5m: select REGMAP_I2C
dmaengine: idxd: set DMA channel to be private
power: supply: fix sbs-charger build, needs REGMAP_I2C
clocksource/drivers/ixp4xx: Select TIMER_OF when needed
clocksource/drivers/mxs_timer: Add missing semicolon when DEBUG is defined
spi: imx: Don't print error on -EPROBEDEFER
RDMA/mlx5: Use the correct obj_id upon DEVX TIR creation
IB/mlx5: Add mutex destroy call to cap_mask_mutex mutex
clk: sunxi-ng: h6: Fix clock divider range on some clocks
platform/chrome: cros_ec_proto: Use EC_HOST_EVENT_MASK not BIT
platform/chrome: cros_ec_proto: Add LID and BATTERY to default mask
regulator: axp20x: Fix reference cout leak
watch_queue: Drop references to /dev/watch_queue
certs: Fix blacklist flag type confusion
regulator: s5m8767: Fix reference count leak
spi: atmel: Put allocated master before return
regulator: s5m8767: Drop regulators OF node reference
power: supply: axp20x_usb_power: Init work before enabling IRQs
power: supply: smb347-charger: Fix interrupt usage if interrupt is unavailable
regulator: core: Avoid debugfs: Directory ... already present! error
isofs: release buffer head before return
watchdog: intel-mid_wdt: Postpone IRQ handler registration till SCU is ready
auxdisplay: ht16k33: Fix refresh rate handling
objtool: Fix error handling for STD/CLD warnings
objtool: Fix retpoline detection in asm code
objtool: Fix ".cold" section suffix check for newer versions of GCC
scsi: lpfc: Fix ancient double free
iommu: Switch gather->end to the inclusive end
IB/umad: Return EIO in case of when device disassociated
IB/umad: Return EPOLLERR in case of when device disassociated
KVM: PPC: Make the VMX instruction emulation routines static
powerpc/47x: Disable 256k page size
powerpc/time: Enable sched clock for irqtime
mmc: owl-mmc: Fix a resource leak in an error handling path and in the remove function
mmc: sdhci-sprd: Fix some resource leaks in the remove function
mmc: usdhi6rol0: Fix a resource leak in the error handling path of the probe
mmc: renesas_sdhi_internal_dmac: Fix DMA buffer alignment from 8 to 128-bytes
ARM: 9046/1: decompressor: Do not clear SCTLR.nTLSMD for ARMv7+ cores
i2c: qcom-geni: Store DMA mapping data in geni_i2c_dev struct
amba: Fix resource leak for drivers without .remove
iommu: Move iotlb_sync_map out from __iommu_map
iommu: Properly pass gfp_t in _iommu_map() to avoid atomic sleeping
IB/mlx5: Return appropriate error code instead of ENOMEM
IB/cm: Avoid a loop when device has 255 ports
tracepoint: Do not fail unregistering a probe due to memory failure
rtc: zynqmp: depend on HAS_IOMEM
perf tools: Fix DSO filtering when not finding a map for a sampled address
perf vendor events arm64: Fix Ampere eMag event typo
RDMA/rxe: Fix coding error in rxe_recv.c
RDMA/rxe: Fix coding error in rxe_rcv_mcast_pkt
RDMA/rxe: Correct skb on loopback path
spi: stm32: properly handle 0 byte transfer
mfd: altera-sysmgr: Fix physical address storing more
mfd: wm831x-auxadc: Prevent use after free in wm831x_auxadc_read_irq()
powerpc/pseries/dlpar: handle ibm, configure-connector delay status
powerpc/8xx: Fix software emulation interrupt
clk: qcom: gcc-msm8998: Fix Alpha PLL type for all GPLLs
kunit: tool: fix unit test cleanup handling
kselftests: dmabuf-heaps: Fix Makefile's inclusion of the kernel's usr/include dir
RDMA/hns: Fixed wrong judgments in the goto branch
RDMA/siw: Fix calculation of tx_valid_cpus size
RDMA/hns: Fix type of sq_signal_bits
RDMA/hns: Disable RQ inline by default
clk: divider: fix initialization with parent_hw
spi: pxa2xx: Fix the controller numbering for Wildcat Point
powerpc/uaccess: Avoid might_fault() when user access is enabled
powerpc/kuap: Restore AMR after replaying soft interrupts
regulator: qcom-rpmh: fix pm8009 ldo7
clk: aspeed: Fix APLL calculate formula from ast2600-A2
selftests/ftrace: Update synthetic event syntax errors
perf symbols: Use (long) for iterator for bfd symbols
regulator: bd718x7, bd71828, Fix dvs voltage levels
spi: dw: Avoid stack content exposure
spi: Skip zero-length transfers in spi_transfer_one_message()
printk: avoid prb_first_valid_seq() where possible
perf symbols: Fix return value when loading PE DSO
nfsd: register pernet ops last, unregister first
svcrdma: Hold private mutex while invoking rdma_accept()
ceph: fix flush_snap logic after putting caps
RDMA/hns: Fixes missing error code of CMDQ
RDMA/ucma: Fix use-after-free bug in ucma_create_uevent
RDMA/rtrs-srv: Fix stack-out-of-bounds
RDMA/rtrs: Only allow addition of path to an already established session
RDMA/rtrs-srv: fix memory leak by missing kobject free
RDMA/rtrs-srv-sysfs: fix missing put_device
RDMA/rtrs-srv: Do not pass a valid pointer to PTR_ERR()
Input: sur40 - fix an error code in sur40_probe()
perf record: Fix continue profiling after draining the buffer
perf intel-pt: Fix missing CYC processing in PSB
perf intel-pt: Fix premature IPC
perf intel-pt: Fix IPC with CYC threshold
perf test: Fix unaligned access in sample parsing test
Input: elo - fix an error code in elo_connect()
sparc64: only select COMPAT_BINFMT_ELF if BINFMT_ELF is set
sparc: fix led.c driver when PROC_FS is not enabled
Input: zinitix - fix return type of zinitix_init_touch()
ARM: 9065/1: OABI compat: fix build when EPOLL is not enabled
misc: eeprom_93xx46: Fix module alias to enable module autoprobe
phy: rockchip-emmc: emmc_phy_init() always return 0
phy: cadence-torrent: Fix error code in cdns_torrent_phy_probe()
misc: eeprom_93xx46: Add module alias to avoid breaking support for non device tree users
PCI: rcar: Always allocate MSI addresses in 32bit space
soundwire: cadence: fix ACK/NAK handling
pwm: rockchip: Enable APB clock during register access while probing
pwm: rockchip: rockchip_pwm_probe(): Remove superfluous clk_unprepare()
pwm: rockchip: Eliminate potential race condition when probing
PCI: xilinx-cpm: Fix reference count leak on error path
VMCI: Use set_page_dirty_lock() when unregistering guest memory
PCI: Align checking of syscall user config accessors
mei: hbm: call mei_set_devstate() on hbm stop response
drm/msm: Fix MSM_INFO_GET_IOVA with carveout
drm/msm/dsi: Correct io_start for MSM8994 (20nm PHY)
drm/msm/mdp5: Fix wait-for-commit for cmd panels
drm/msm: Fix race of GPU init vs timestamp power management.
drm/msm: Fix races managing the OOB state for timestamp vs timestamps.
drm/msm/dp: trigger unplug event in msm_dp_display_disable
vfio/iommu_type1: Populate full dirty when detach non-pinned group
vfio/iommu_type1: Fix some sanity checks in detach group
vfio-pci/zdev: fix possible segmentation fault issue
ext4: fix potential htree index checksum corruption
phy: USB_LGM_PHY should depend on X86
coresight: etm4x: Skip accessing TRCPDCR in save/restore
nvmem: core: Fix a resource leak on error in nvmem_add_cells_from_of()
nvmem: core: skip child nodes not matching binding
soundwire: bus: use sdw_update_no_pm when initializing a device
soundwire: bus: use sdw_write_no_pm when setting the bus scale registers
soundwire: export sdw_write/read_no_pm functions
soundwire: bus: fix confusion on device used by pm_runtime
misc: fastrpc: fix incorrect usage of dma_map_sgtable
remoteproc/mediatek: acknowledge watchdog IRQ after handled
regmap: sdw: use _no_pm functions in regmap_read/write
ext: EXT4_KUNIT_TESTS should depend on EXT4_FS instead of selecting it
mailbox: sprd: correct definition of SPRD_OUTBOX_FIFO_FULL
device-dax: Fix default return code of range_parse()
PCI: pci-bridge-emul: Fix array overruns, improve safety
PCI: cadence: Fix DMA range mapping early return error
i40e: Fix flow for IPv6 next header (extension header)
i40e: Add zero-initialization of AQ command structures
i40e: Fix overwriting flow control settings during driver loading
i40e: Fix addition of RX filters after enabling FW LLDP agent
i40e: Fix VFs not created
Take mmap lock in cacheflush syscall
nios2: fixed broken sys_clone syscall
i40e: Fix add TC filter for IPv6
octeontx2-af: Fix an off by one in rvu_dbg_qsize_write()
pwm: iqs620a: Fix overflow and optimize calculations
vfio/type1: Use follow_pte()
ice: report correct max number of TCs
ice: Account for port VLAN in VF max packet size calculation
ice: Fix state bits on LLDP mode switch
ice: update the number of available RSS queues
net: stmmac: fix CBS idleslope and sendslope calculation
net/mlx4_core: Add missed mlx4_free_cmd_mailbox()
PCI: rockchip: Make 'ep-gpios' DT property optional
vxlan: move debug check after netdev unregister
wireguard: device: do not generate ICMP for non-IP packets
wireguard: kconfig: use arm chacha even with no neon
ocfs2: fix a use after free on error
mm: memcontrol: fix NR_ANON_THPS accounting in charge moving
mm: memcontrol: fix slub memory accounting
mm/memory.c: fix potential pte_unmap_unlock pte error
mm/hugetlb: fix potential double free in hugetlb_register_node() error path
mm/hugetlb: suppress wrong warning info when alloc gigantic page
mm/compaction: fix misbehaviors of fast_find_migrateblock()
r8169: fix jumbo packet handling on RTL8168e
NFSv4: Fixes for nfs4_bitmask_adjust()
KVM: SVM: Intercept INVPCID when it's disabled to inject #UD
KVM: x86/mmu: Expand collapsible SPTE zap for TDP MMU to ZONE_DEVICE and HugeTLB pages
arm64: Add missing ISB after invalidating TLB in __primary_switch
i2c: brcmstb: Fix brcmstd_send_i2c_cmd condition
i2c: exynos5: Preserve high speed master code
mm,thp,shmem: make khugepaged obey tmpfs mount flags
mm: fix memory_failure() handling of dax-namespace metadata
mm/rmap: fix potential pte_unmap on an not mapped pte
proc: use kvzalloc for our kernel buffer
csky: Fix a size determination in gpr_get()
scsi: bnx2fc: Fix Kconfig warning & CNIC build errors
scsi: sd: sd_zbc: Don't pass GFP_NOIO to kvcalloc
block: reopen the device in blkdev_reread_part
ide/falconide: Fix module unload
scsi: sd: Fix Opal support
blk-settings: align max_sectors on "logical_block_size" boundary
soundwire: intel: fix possible crash when no device is detected
ACPI: property: Fix fwnode string properties matching
ACPI: configfs: add missing check after configfs_register_default_group()
cpufreq: ACPI: Set cpuinfo.max_freq directly if max boost is known
HID: logitech-dj: add support for keyboard events in eQUAD step 4 Gaming
HID: wacom: Ignore attempts to overwrite the touch_max value from HID
Input: raydium_ts_i2c - do not send zero length
Input: xpad - add support for PowerA Enhanced Wired Controller for Xbox Series X|S
Input: joydev - prevent potential read overflow in ioctl
Input: i8042 - add ASUS Zenbook Flip to noselftest list
media: mceusb: Fix potential out-of-bounds shift
USB: serial: option: update interface mapping for ZTE P685M
usb: musb: Fix runtime PM race in musb_queue_resume_work
usb: dwc3: gadget: Fix setting of DEPCFG.bInterval_m1
usb: dwc3: gadget: Fix dep->interval for fullspeed interrupt
USB: serial: ftdi_sio: fix FTX sub-integer prescaler
USB: serial: pl2303: fix line-speed handling on newer chips
USB: serial: mos7840: fix error code in mos7840_write()
USB: serial: mos7720: fix error code in mos7720_write()
phy: lantiq: rcu-usb2: wait after clock enable
ALSA: fireface: fix to parse sync status register of latter protocol
ALSA: hda: Add another CometLake-H PCI ID
ALSA: hda/hdmi: Drop bogus check at closing a stream
ALSA: hda/realtek: modify EAPD in the ALC886
ALSA: hda/realtek: Quirk for HP Spectre x360 14 amp setup
MIPS: Ingenic: Disable HPTLB for D0 XBurst CPUs too
MIPS: Support binutils configured with --enable-mips-fix-loongson3-llsc=yes
MIPS: VDSO: Use CLANG_FLAGS instead of filtering out '--target='
Revert "MIPS: Octeon: Remove special handling of CONFIG_MIPS_ELF_APPENDED_DTB=y"
Revert "bcache: Kill btree_io_wq"
bcache: Give btree_io_wq correct semantics again
bcache: Move journal work to new flush wq
Revert "drm/amd/display: Update NV1x SR latency values"
drm/amd/display: Add FPU wrappers to dcn21_validate_bandwidth()
drm/amd/display: Remove Assert from dcn10_get_dig_frontend
drm/amd/display: Add vupdate_no_lock interrupts for DCN2.1
drm/amdkfd: Fix recursive lock warnings
drm/amdgpu: Set reference clock to 100Mhz on Renoir (v2)
drm/nouveau/kms: handle mDP connectors
drm/modes: Switch to 64bit maths to avoid integer overflow
drm/sched: Cancel and flush all outstanding jobs before finish.
drm/panel: kd35t133: allow using non-continuous dsi clock
drm/rockchip: Require the YTR modifier for AFBC
ASoC: siu: Fix build error by a wrong const prefix
selinux: fix inconsistency between inode_getxattr and inode_listsecurity
erofs: initialized fields can only be observed after bit is set
tpm_tis: Fix check_locality for correct locality acquisition
tpm_tis: Clean up locality release
KEYS: trusted: Fix incorrect handling of tpm_get_random()
KEYS: trusted: Fix migratable=1 failing
KEYS: trusted: Reserve TPM for seal and unseal operations
btrfs: do not cleanup upper nodes in btrfs_backref_cleanup_node
btrfs: do not warn if we can't find the reloc root when looking up backref
btrfs: add asserts for deleting backref cache nodes
btrfs: abort the transaction if we fail to inc ref in btrfs_copy_root
btrfs: fix reloc root leak with 0 ref reloc roots on recovery
btrfs: splice remaining dirty_bg's onto the transaction dirty bg list
btrfs: handle space_info::total_bytes_pinned inside the delayed ref itself
btrfs: account for new extents being deleted in total_bytes_pinned
btrfs: fix extent buffer leak on failure to copy root
drm/i915/gt: Flush before changing register state
drm/i915/gt: Correct surface base address for renderclear
crypto: arm64/sha - add missing module aliases
crypto: aesni - prevent misaligned buffers on the stack
crypto: michael_mic - fix broken misalignment handling
crypto: sun4i-ss - checking sg length is not sufficient
crypto: sun4i-ss - IV register does not work on A10 and A13
crypto: sun4i-ss - handle BigEndian for cipher
crypto: sun4i-ss - initialize need_fallback
soc: samsung: exynos-asv: don't defer early on not-supported SoCs
soc: samsung: exynos-asv: handle reading revision register error
seccomp: Add missing return in non-void function
arm64: ptrace: Fix seccomp of traced syscall -1 (NO_SYSCALL)
misc: rtsx: init of rts522a add OCP power off when no card is present
drivers/misc/vmw_vmci: restrict too big queue size in qp_host_alloc_queue
pstore: Fix typo in compression option name
dts64: mt7622: fix slow sd card access
arm64: dts: agilex: fix phy interface bit shift for gmac1 and gmac2
staging/mt7621-dma: mtk-hsdma.c->hsdma-mt7621.c
staging: gdm724x: Fix DMA from stack
staging: rtl8188eu: Add Edimax EW-7811UN V2 to device table
floppy: reintroduce O_NDELAY fix
media: i2c: max9286: fix access to unallocated memory
media: ir_toy: add another IR Droid device
media: ipu3-cio2: Fix mbus_code processing in cio2_subdev_set_fmt()
media: marvell-ccic: power up the device on mclk enable
media: smipcie: fix interrupt handling and IR timeout
x86/virt: Eat faults on VMXOFF in reboot flows
x86/reboot: Force all cpus to exit VMX root if VMX is supported
x86/fault: Fix AMD erratum #91 errata fixup for user code
x86/entry: Fix instrumentation annotation
powerpc/prom: Fix "ibm,arch-vec-5-platform-support" scan
rcu: Pull deferred rcuog wake up to rcu_eqs_enter() callers
rcu/nocb: Perform deferred wake up before last idle's need_resched() check
kprobes: Fix to delay the kprobes jump optimization
arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55
iommu/arm-smmu-qcom: Fix mask extraction for bootloader programmed SMRs
arm64: kexec_file: fix memory leakage in create_dtb() when fdt_open_into() fails
arm64: uprobe: Return EOPNOTSUPP for AARCH32 instruction probing
arm64 module: set plt* section addresses to 0x0
arm64: spectre: Prevent lockdep splat on v4 mitigation enable path
riscv: Disable KSAN_SANITIZE for vDSO
watchdog: qcom: Remove incorrect usage of QCOM_WDT_ENABLE_IRQ
watchdog: mei_wdt: request stop on unregister
coresight: etm4x: Handle accesses to TRCSTALLCTLR
mtd: spi-nor: sfdp: Fix last erase region marking
mtd: spi-nor: sfdp: Fix wrong erase type bitmask for overlaid region
mtd: spi-nor: core: Fix erase type discovery for overlaid region
mtd: spi-nor: core: Add erase size check for erase command initialization
mtd: spi-nor: hisi-sfc: Put child node np on error path
fs/affs: release old buffer head on error path
seq_file: document how per-entry resources are managed.
x86: fix seq_file iteration for pat/memtype.c
mm: memcontrol: fix swap undercounting in cgroup2
mm: memcontrol: fix get_active_memcg return value
hugetlb: fix update_and_free_page contig page struct assumption
hugetlb: fix copy_huge_page_from_user contig page struct assumption
mm/vmscan: restore zone_reclaim_mode ABI
mm, compaction: make fast_isolate_freepages() stay within zone
KVM: nSVM: fix running nested guests when npt=0
nvmem: qcom-spmi-sdam: Fix uninitialized pdev pointer
module: Ignore _GLOBAL_OFFSET_TABLE_ when warning for undefined symbols
mmc: sdhci-esdhc-imx: fix kernel panic when remove module
mmc: sdhci-pci-o2micro: Bug fix for SDR104 HW tuning failure
powerpc/32: Preserve cr1 in exception prolog stack check to fix build error
powerpc/kexec_file: fix FDT size estimation for kdump kernel
powerpc/32s: Add missing call to kuep_lock on syscall entry
spmi: spmi-pmic-arb: Fix hw_irq overflow
mei: fix transfer over dma with extended header
mei: me: emmitsburg workstation DID
mei: me: add adler lake point S DID
mei: me: add adler lake point LP DID
gpio: pcf857x: Fix missing first interrupt
mfd: gateworks-gsc: Fix interrupt type
printk: fix deadlock when kernel panic
exfat: fix shift-out-of-bounds in exfat_fill_super()
zonefs: Fix file size of zones in full condition
kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE
thermal: cpufreq_cooling: freq_qos_update_request() returns < 0 on error
cpufreq: qcom-hw: drop devm_xxx() calls from init/exit hooks
cpufreq: intel_pstate: Change intel_pstate_get_hwp_max() argument
cpufreq: intel_pstate: Get per-CPU max freq via MSR_HWP_CAPABILITIES if available
proc: don't allow async path resolution of /proc/thread-self components
s390/vtime: fix inline assembly clobber list
virtio/s390: implement virtio-ccw revision 2 correctly
um: mm: check more comprehensively for stub changes
um: defer killing userspace on page table update failures
irqchip/loongson-pch-msi: Use bitmap_zalloc() to allocate bitmap
f2fs: fix out-of-repair __setattr_copy()
f2fs: enforce the immutable flag on open files
f2fs: flush data when enabling checkpoint back
sparc32: fix a user-triggerable oops in clear_user()
spi: fsl: invert spisel_boot signal on MPC8309
spi: spi-synquacer: fix set_cs handling
gfs2: fix glock confusion in function signal_our_withdraw
gfs2: Don't skip dlm unlock if glock has an lvb
gfs2: Lock imbalance on error path in gfs2_recover_one
gfs2: Recursive gfs2_quota_hold in gfs2_iomap_end
dm: fix deadlock when swapping to encrypted device
dm table: fix iterate_devices based device capability checks
dm table: fix DAX iterate_devices based device capability checks
dm table: fix zoned iterate_devices based device capability checks
dm writecache: fix performance degradation in ssd mode
dm writecache: return the exact table values that were set
dm writecache: fix writing beyond end of underlying device when shrinking
dm era: Recover committed writeset after crash
dm era: Update in-core bitset after committing the metadata
dm era: Verify the data block size hasn't changed
dm era: Fix bitset memory leaks
dm era: Use correct value size in equality function of writeset tree
dm era: Reinitialize bitset cache before digesting a new writeset
dm era: only resize metadata in preresume
drm/i915: Reject 446-480MHz HDMI clock on GLK
kgdb: fix to kill breakpoints on initmem after boot
ipv6: silence compilation warning for non-IPV6 builds
net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending
wireguard: selftests: test multiple parallel streams
wireguard: queueing: get rid of per-peer ring buffers
net: sched: fix police ext initialization
net: qrtr: Fix memory leak in qrtr_tun_open
net_sched: fix RTNL deadlock again caused by request_module()
ARM: dts: aspeed: Add LCLK to lpc-snoop
Linux 5.10.20
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I3fbcecd9413ce212dac68d5cc800c9457feba56a
commit 519983645a9f2ec339cabfa0c6ef7b09be985dd0 upstream.
I went to go add a new RECLAIM_* mode for the zone_reclaim_mode sysctl.
Like a good kernel developer, I also went to go update the
documentation. I noticed that the bits in the documentation didn't
match the bits in the #defines.
The VM never explicitly checks the RECLAIM_ZONE bit. The bit is,
however implicitly checked when checking 'node_reclaim_mode==0'. The
RECLAIM_ZONE #define was removed in a cleanup. That, by itself is fine.
But, when the bit was removed (bit 0) the _other_ bit locations also got
changed. That's not OK because the bit values are documented to mean
one specific thing. Users surely do not expect the meaning to change
from kernel to kernel.
The end result is that if someone had a script that did:
sysctl vm.zone_reclaim_mode=1
it would have gone from enabling node reclaim for clean unmapped pages
to writing out pages during node reclaim after the commit in question.
That's not great.
Put the bits back the way they were and add a comment so something like
this is a bit harder to do again. Update the documentation to make it
clear that the first bit is ignored.
Link: https://lkml.kernel.org/r/20210219172555.FF0CDF23@viggo.jf.intel.com
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Fixes: 648b5cf368 ("mm/vmscan: remove unused RECLAIM_OFF/RECLAIM_ZONE")
Reviewed-by: Ben Widawsky <ben.widawsky@intel.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Daniel Wagner <dwagner@suse.de>
Cc: "Tobin C. Harding" <tobin@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Qian Cai <cai@lca.pw>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
With this change, when the knob is set to 0, it allows unprivileged users
to call userfaultfd, like when it is set to 1, but with the restriction
that page faults from only user-mode can be handled. In this mode, an
unprivileged user (without SYS_CAP_PTRACE capability) must pass
UFFD_USER_MODE_ONLY to userfaultd or the API will fail with EPERM.
This enables administrators to reduce the likelihood that an attacker with
access to userfaultfd can delay faulting kernel code to widen timing
windows for other exploits.
The default value of this knob is changed to 0. This is required for
correct functioning of pipe mutex. However, this will fail postcopy live
migration, which will be unnoticeable to the VM guests. To avoid this,
set 'vm.userfault = 1' in /sys/sysctl.conf.
The main reason this change is desirable as in the short term is that the
Android userland will behave as with the sysctl set to zero. So without
this commit, any Linux binary using userfaultfd to manage its memory would
behave differently if run within the Android userland. For more details,
refer to Andrea's reply [1].
[1] https://lore.kernel.org/lkml/20200904033438.GI9411@redhat.com/
Link: https://lkml.kernel.org/r/20201120030411.2690816-3-lokeshgidra@google.com
Signed-off-by: Lokesh Gidra <lokeshgidra@google.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Peter Xu <peterx@redhat.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Stephen Smalley <stephen.smalley.work@gmail.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Daniel Colascione <dancol@dancol.org>
Cc: "Joel Fernandes (Google)" <joel@joelfernandes.org>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: <calin@google.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Shaohua Li <shli@fb.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Nitin Gupta <nigupta@nvidia.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Iurii Zaikin <yzaikin@google.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Daniel Colascione <dancol@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit d0d4730ac2e404a5b0da9a87ef38c73e51cb1664)
Bug: 160737021
Bug: 169683130
Signed-off-by: Lokesh Gidra <lokeshgidra@google.com>
Change-Id: I08b7080b49ca626c5ab41bb2621fa21fa9a928a2
Steps on the way to 5.10-rc1
Resolves conflicts in:
Documentation/admin-guide/sysctl/vm.rst
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ic58f28718f28dae42948c935dfb0c62122fe86fc
Steps on the way to 5.10-rc1
Resolves merge issues in:
drivers/net/virtio_net.c
net/xfrm/xfrm_state.c
net/xfrm/xfrm_user.c
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I3132e7802f25cb775eb02d0b3a03068da39a6fe2
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Merge tag 'docs-5.10-2' of git://git.lwn.net/linux
Pull documentation fixes from Jonathan Corbet:
"A handful of late-arriving documentation fixes"
* tag 'docs-5.10-2' of git://git.lwn.net/linux:
docs: Add two missing entries in vm sysctl index
docs/vm: trivial fixes to several spelling mistakes
docs: submitting-patches: describe preserving review/test tags
Documentation: Chinese translation of Documentation/arm64/hugetlbpage.rst
Documentation: x86: fix a missing word in x86_64/mm.rst.
docs: driver-api: remove a duplicated index entry
docs: lkdtm: Modernize and improve details
docs: deprecated.rst: Expand str*cpy() replacement notes
docs/cpu-load: format the example code.
Add redirect_neigh() BPF packet redirect helper, allowing to limit stack
traversal in common container configs and improving TCP back-pressure.
Daniel reports ~10Gbps => ~15Gbps single stream TCP performance gain.
Expand netlink policy support and improve policy export to user space.
(Ge)netlink core performs request validation according to declared
policies. Expand the expressiveness of those policies (min/max length
and bitmasks). Allow dumping policies for particular commands.
This is used for feature discovery by user space (instead of kernel
version parsing or trial and error).
Support IGMPv3/MLDv2 multicast listener discovery protocols in bridge.
Allow more than 255 IPv4 multicast interfaces.
Add support for Type of Service (ToS) reflection in SYN/SYN-ACK
packets of TCPv6.
In Multi-patch TCP (MPTCP) support concurrent transmission of data
on multiple subflows in a load balancing scenario. Enhance advertising
addresses via the RM_ADDR/ADD_ADDR options.
Support SMC-Dv2 version of SMC, which enables multi-subnet deployments.
Allow more calls to same peer in RxRPC.
Support two new Controller Area Network (CAN) protocols -
CAN-FD and ISO 15765-2:2016.
Add xfrm/IPsec compat layer, solving the 32bit user space on 64bit
kernel problem.
Add TC actions for implementing MPLS L2 VPNs.
Improve nexthop code - e.g. handle various corner cases when nexthop
objects are removed from groups better, skip unnecessary notifications
and make it easier to offload nexthops into HW by converting
to a blocking notifier.
Support adding and consuming TCP header options by BPF programs,
opening the doors for easy experimental and deployment-specific
TCP option use.
Reorganize TCP congestion control (CC) initialization to simplify life
of TCP CC implemented in BPF.
Add support for shipping BPF programs with the kernel and loading them
early on boot via the User Mode Driver mechanism, hence reusing all the
user space infra we have.
Support sleepable BPF programs, initially targeting LSM and tracing.
Add bpf_d_path() helper for returning full path for given 'struct path'.
Make bpf_tail_call compatible with bpf-to-bpf calls.
Allow BPF programs to call map_update_elem on sockmaps.
Add BPF Type Format (BTF) support for type and enum discovery, as
well as support for using BTF within the kernel itself (current use
is for pretty printing structures).
Support listing and getting information about bpf_links via the bpf
syscall.
Enhance kernel interfaces around NIC firmware update. Allow specifying
overwrite mask to control if settings etc. are reset during update;
report expected max time operation may take to users; support firmware
activation without machine reboot incl. limits of how much impact
reset may have (e.g. dropping link or not).
Extend ethtool configuration interface to report IEEE-standard
counters, to limit the need for per-vendor logic in user space.
Adopt or extend devlink use for debug, monitoring, fw update
in many drivers (dsa loop, ice, ionic, sja1105, qed, mlxsw,
mv88e6xxx, dpaa2-eth).
In mlxsw expose critical and emergency SFP module temperature alarms.
Refactor port buffer handling to make the defaults more suitable and
support setting these values explicitly via the DCBNL interface.
Add XDP support for Intel's igb driver.
Support offloading TC flower classification and filtering rules to
mscc_ocelot switches.
Add PTP support for Marvell Octeontx2 and PP2.2 hardware, as well as
fixed interval period pulse generator and one-step timestamping in
dpaa-eth.
Add support for various auth offloads in WiFi APs, e.g. SAE (WPA3)
offload.
Add Lynx PHY/PCS MDIO module, and convert various drivers which have
this HW to use it. Convert mvpp2 to split PCS.
Support Marvell Prestera 98DX3255 24-port switch ASICs, as well as
7-port Mediatek MT7531 IP.
Add initial support for QCA6390 and IPQ6018 in ath11k WiFi driver,
and wcn3680 support in wcn36xx.
Improve performance for packets which don't require much offloads
on recent Mellanox NICs by 20% by making multiple packets share
a descriptor entry.
Move chelsio inline crypto drivers (for TLS and IPsec) from the crypto
subtree to drivers/net. Move MDIO drivers out of the phy directory.
Clean up a lot of W=1 warnings, reportedly the actively developed
subsections of networking drivers should now build W=1 warning free.
Make sure drivers don't use in_interrupt() to dynamically adapt their
code. Convert tasklets to use new tasklet_setup API (sadly this
conversion is not yet complete).
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
- Add redirect_neigh() BPF packet redirect helper, allowing to limit
stack traversal in common container configs and improving TCP
back-pressure.
Daniel reports ~10Gbps => ~15Gbps single stream TCP performance gain.
- Expand netlink policy support and improve policy export to user
space. (Ge)netlink core performs request validation according to
declared policies. Expand the expressiveness of those policies
(min/max length and bitmasks). Allow dumping policies for particular
commands. This is used for feature discovery by user space (instead
of kernel version parsing or trial and error).
- Support IGMPv3/MLDv2 multicast listener discovery protocols in
bridge.
- Allow more than 255 IPv4 multicast interfaces.
- Add support for Type of Service (ToS) reflection in SYN/SYN-ACK
packets of TCPv6.
- In Multi-patch TCP (MPTCP) support concurrent transmission of data on
multiple subflows in a load balancing scenario. Enhance advertising
addresses via the RM_ADDR/ADD_ADDR options.
- Support SMC-Dv2 version of SMC, which enables multi-subnet
deployments.
- Allow more calls to same peer in RxRPC.
- Support two new Controller Area Network (CAN) protocols - CAN-FD and
ISO 15765-2:2016.
- Add xfrm/IPsec compat layer, solving the 32bit user space on 64bit
kernel problem.
- Add TC actions for implementing MPLS L2 VPNs.
- Improve nexthop code - e.g. handle various corner cases when nexthop
objects are removed from groups better, skip unnecessary
notifications and make it easier to offload nexthops into HW by
converting to a blocking notifier.
- Support adding and consuming TCP header options by BPF programs,
opening the doors for easy experimental and deployment-specific TCP
option use.
- Reorganize TCP congestion control (CC) initialization to simplify
life of TCP CC implemented in BPF.
- Add support for shipping BPF programs with the kernel and loading
them early on boot via the User Mode Driver mechanism, hence reusing
all the user space infra we have.
- Support sleepable BPF programs, initially targeting LSM and tracing.
- Add bpf_d_path() helper for returning full path for given 'struct
path'.
- Make bpf_tail_call compatible with bpf-to-bpf calls.
- Allow BPF programs to call map_update_elem on sockmaps.
- Add BPF Type Format (BTF) support for type and enum discovery, as
well as support for using BTF within the kernel itself (current use
is for pretty printing structures).
- Support listing and getting information about bpf_links via the bpf
syscall.
- Enhance kernel interfaces around NIC firmware update. Allow
specifying overwrite mask to control if settings etc. are reset
during update; report expected max time operation may take to users;
support firmware activation without machine reboot incl. limits of
how much impact reset may have (e.g. dropping link or not).
- Extend ethtool configuration interface to report IEEE-standard
counters, to limit the need for per-vendor logic in user space.
- Adopt or extend devlink use for debug, monitoring, fw update in many
drivers (dsa loop, ice, ionic, sja1105, qed, mlxsw, mv88e6xxx,
dpaa2-eth).
- In mlxsw expose critical and emergency SFP module temperature alarms.
Refactor port buffer handling to make the defaults more suitable and
support setting these values explicitly via the DCBNL interface.
- Add XDP support for Intel's igb driver.
- Support offloading TC flower classification and filtering rules to
mscc_ocelot switches.
- Add PTP support for Marvell Octeontx2 and PP2.2 hardware, as well as
fixed interval period pulse generator and one-step timestamping in
dpaa-eth.
- Add support for various auth offloads in WiFi APs, e.g. SAE (WPA3)
offload.
- Add Lynx PHY/PCS MDIO module, and convert various drivers which have
this HW to use it. Convert mvpp2 to split PCS.
- Support Marvell Prestera 98DX3255 24-port switch ASICs, as well as
7-port Mediatek MT7531 IP.
- Add initial support for QCA6390 and IPQ6018 in ath11k WiFi driver,
and wcn3680 support in wcn36xx.
- Improve performance for packets which don't require much offloads on
recent Mellanox NICs by 20% by making multiple packets share a
descriptor entry.
- Move chelsio inline crypto drivers (for TLS and IPsec) from the
crypto subtree to drivers/net. Move MDIO drivers out of the phy
directory.
- Clean up a lot of W=1 warnings, reportedly the actively developed
subsections of networking drivers should now build W=1 warning free.
- Make sure drivers don't use in_interrupt() to dynamically adapt their
code. Convert tasklets to use new tasklet_setup API (sadly this
conversion is not yet complete).
* tag 'net-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2583 commits)
Revert "bpfilter: Fix build error with CONFIG_BPFILTER_UMH"
net, sockmap: Don't call bpf_prog_put() on NULL pointer
bpf, selftest: Fix flaky tcp_hdr_options test when adding addr to lo
bpf, sockmap: Add locking annotations to iterator
netfilter: nftables: allow re-computing sctp CRC-32C in 'payload' statements
net: fix pos incrementment in ipv6_route_seq_next
net/smc: fix invalid return code in smcd_new_buf_create()
net/smc: fix valid DMBE buffer sizes
net/smc: fix use-after-free of delayed events
bpfilter: Fix build error with CONFIG_BPFILTER_UMH
cxgb4/ch_ipsec: Replace the module name to ch_ipsec from chcr
net: sched: Fix suspicious RCU usage while accessing tcf_tunnel_info
bpf: Fix register equivalence tracking.
rxrpc: Fix loss of final ack on shutdown
rxrpc: Fix bundle counting for exclusive connections
netfilter: restore NF_INET_NUMHOOKS
ibmveth: Identify ingress large send packets.
ibmveth: Switch order of ibmveth_helper calls.
cxgb4: handle 4-tuple PEDIT to NAT mode translation
selftests: Add VRF route leaking tests
...
Following the structure used in sysctl/kernel.rst, this updates
abi.rst to use ReStructured Text more fully and updates the entries to
match current kernels:
* the list of files is now the table of contents;
* links are used to point to other documentation and other sections;
* all the existing entries are no longer present, so this removes
them;
* document vsyscall32.
Mentions of the kernel version are dropped. Since the document is
entirely rewritten, I've replaced the copyright statement.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200917072123.8847-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Following the structure used in sysctl/kernel.rst, this updates
abi.rst to use ReStructured Text more fully and updates the entries to
match current kernels:
* the list of files is now the table of contents;
* links are used to point to other documentation and other sections;
* all the existing entries are no longer present, so this removes
them;
* document vsyscall32.
Mentions of the kernel version are dropped. Since the document is
entirely rewritten, I've replaced the copyright statement.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200911190152.29730-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The sysctl that was added earlier by commit 79134e6ce2 ("net: do
not create fallback tunnels for non-default namespaces") to create
fall-back only in root-ns. This patch enhances that behavior to provide
option not to create fallback tunnels in root-ns as well. Since modules
that create fallback tunnels could be built-in and setting the sysctl
value after booting is pointless, so added a kernel cmdline options to
change this default. The default setting is preseved for backward
compatibility. The kernel command line option of fb_tunnels=initns will
set the sysctl value to 1 and will create fallback tunnels only in initns
while kernel cmdline fb_tunnels=none will set the sysctl value to 2 and
fallback tunnels are skipped in every netns.
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Maciej Zenczykowski <maze@google.com>
Cc: Jian Yang <jianyang@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The document reads "%e" should be "executable filename" while actually it
could be changed by things like pr_ctl PR_SET_NAME. People who uses "%e"
in core_pattern get surprised when they find out they get thread name
instead of executable filename.
This is either a bug of document or a bug of code. Since the behavior of
"%e" is there for long time, it could bring another surprise for users if
we "fix" the code.
So we just "fix" the document. And more, for users who really need the
"executable filename" in core_pattern, we introduce a new "%f" for the
real executable filename. We already have "%E" for executable path in
kernel, so just reuse most of its code for the new added "%f" format.
Signed-off-by: Lepton Wu <ytht.net@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200701031432.2978761-1-ytht.net@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For some applications, we need to allocate almost all memory as hugepages.
However, on a running system, higher-order allocations can fail if the
memory is fragmented. Linux kernel currently does on-demand compaction as
we request more hugepages, but this style of compaction incurs very high
latency. Experiments with one-time full memory compaction (followed by
hugepage allocations) show that kernel is able to restore a highly
fragmented memory state to a fairly compacted memory state within <1 sec
for a 32G system. Such data suggests that a more proactive compaction can
help us allocate a large fraction of memory as hugepages keeping
allocation latencies low.
For a more proactive compaction, the approach taken here is to define a
new sysctl called 'vm.compaction_proactiveness' which dictates bounds for
external fragmentation which kcompactd tries to maintain.
The tunable takes a value in range [0, 100], with a default of 20.
Note that a previous version of this patch [1] was found to introduce too
many tunables (per-order extfrag{low, high}), but this one reduces them to
just one sysctl. Also, the new tunable is an opaque value instead of
asking for specific bounds of "external fragmentation", which would have
been difficult to estimate. The internal interpretation of this opaque
value allows for future fine-tuning.
Currently, we use a simple translation from this tunable to [low, high]
"fragmentation score" thresholds (low=100-proactiveness, high=low+10%).
The score for a node is defined as weighted mean of per-zone external
fragmentation. A zone's present_pages determines its weight.
To periodically check per-node score, we reuse per-node kcompactd threads,
which are woken up every 500 milliseconds to check the same. If a node's
score exceeds its high threshold (as derived from user-provided
proactiveness value), proactive compaction is started until its score
reaches its low threshold value. By default, proactiveness is set to 20,
which implies threshold values of low=80 and high=90.
This patch is largely based on ideas from Michal Hocko [2]. See also the
LWN article [3].
Performance data
================
System: x64_64, 1T RAM, 80 CPU threads.
Kernel: 5.6.0-rc3 + this patch
echo madvise | sudo tee /sys/kernel/mm/transparent_hugepage/enabled
echo madvise | sudo tee /sys/kernel/mm/transparent_hugepage/defrag
Before starting the driver, the system was fragmented from a userspace
program that allocates all memory and then for each 2M aligned section,
frees 3/4 of base pages using munmap. The workload is mainly anonymous
userspace pages, which are easy to move around. I intentionally avoided
unmovable pages in this test to see how much latency we incur when
hugepage allocations hit direct compaction.
1. Kernel hugepage allocation latencies
With the system in such a fragmented state, a kernel driver then allocates
as many hugepages as possible and measures allocation latency:
(all latency values are in microseconds)
- With vanilla 5.6.0-rc3
percentile latency
–––––––––– –––––––
5 7894
10 9496
25 12561
30 15295
40 18244
50 21229
60 27556
75 30147
80 31047
90 32859
95 33799
Total 2M hugepages allocated = 383859 (749G worth of hugepages out of 762G
total free => 98% of free memory could be allocated as hugepages)
- With 5.6.0-rc3 + this patch, with proactiveness=20
sysctl -w vm.compaction_proactiveness=20
percentile latency
–––––––––– –––––––
5 2
10 2
25 3
30 3
40 3
50 4
60 4
75 4
80 4
90 5
95 429
Total 2M hugepages allocated = 384105 (750G worth of hugepages out of 762G
total free => 98% of free memory could be allocated as hugepages)
2. JAVA heap allocation
In this test, we first fragment memory using the same method as for (1).
Then, we start a Java process with a heap size set to 700G and request the
heap to be allocated with THP hugepages. We also set THP to madvise to
allow hugepage backing of this heap.
/usr/bin/time
java -Xms700G -Xmx700G -XX:+UseTransparentHugePages -XX:+AlwaysPreTouch
The above command allocates 700G of Java heap using hugepages.
- With vanilla 5.6.0-rc3
17.39user 1666.48system 27:37.89elapsed
- With 5.6.0-rc3 + this patch, with proactiveness=20
8.35user 194.58system 3:19.62elapsed
Elapsed time remains around 3:15, as proactiveness is further increased.
Note that proactive compaction happens throughout the runtime of these
workloads. The situation of one-time compaction, sufficient to supply
hugepages for following allocation stream, can probably happen for more
extreme proactiveness values, like 80 or 90.
In the above Java workload, proactiveness is set to 20. The test starts
with a node's score of 80 or higher, depending on the delay between the
fragmentation step and starting the benchmark, which gives more-or-less
time for the initial round of compaction. As t he benchmark consumes
hugepages, node's score quickly rises above the high threshold (90) and
proactive compaction starts again, which brings down the score to the low
threshold level (80). Repeat.
bpftrace also confirms proactive compaction running 20+ times during the
runtime of this Java benchmark. kcompactd threads consume 100% of one of
the CPUs while it tries to bring a node's score within thresholds.
Backoff behavior
================
Above workloads produce a memory state which is easy to compact. However,
if memory is filled with unmovable pages, proactive compaction should
essentially back off. To test this aspect:
- Created a kernel driver that allocates almost all memory as hugepages
followed by freeing first 3/4 of each hugepage.
- Set proactiveness=40
- Note that proactive_compact_node() is deferred maximum number of times
with HPAGE_FRAG_CHECK_INTERVAL_MSEC of wait between each check
(=> ~30 seconds between retries).
[1] https://patchwork.kernel.org/patch/11098289/
[2] https://lore.kernel.org/linux-mm/20161230131412.GI13301@dhcp22.suse.cz/
[3] https://lwn.net/Articles/817905/
Signed-off-by: Nitin Gupta <nigupta@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Oleksandr Natalenko <oleksandr@redhat.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com>
Reviewed-by: Oleksandr Natalenko <oleksandr@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Nitin Gupta <ngupta@nitingupta.dev>
Cc: Oleksandr Natalenko <oleksandr@redhat.com>
Link: http://lkml.kernel.org/r/20200616204527.19185-1-nigupta@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Steps on the way to 5.9-rc1
Resolves conflicts in:
drivers/irqchip/qcom-pdc.c
include/linux/device.h
net/xfrm/xfrm_state.c
security/lsm_audit.c
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I4aeb3d04f4717714a421721eb3ce690c099bb30a
while to come. Changes include:
- Some new Chinese translations
- Progress on the battle against double words words and non-HTTPS URLs
- Some block-mq documentation
- More RST conversions from Mauro. At this point, that task is
essentially complete, so we shouldn't see this kind of churn again for a
while. Unless we decide to switch to asciidoc or something...:)
- Lots of typo fixes, warning fixes, and more.
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Merge tag 'docs-5.9' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"It's been a busy cycle for documentation - hopefully the busiest for a
while to come. Changes include:
- Some new Chinese translations
- Progress on the battle against double words words and non-HTTPS
URLs
- Some block-mq documentation
- More RST conversions from Mauro. At this point, that task is
essentially complete, so we shouldn't see this kind of churn again
for a while. Unless we decide to switch to asciidoc or
something...:)
- Lots of typo fixes, warning fixes, and more"
* tag 'docs-5.9' of git://git.lwn.net/linux: (195 commits)
scripts/kernel-doc: optionally treat warnings as errors
docs: ia64: correct typo
mailmap: add entry for <alobakin@marvell.com>
doc/zh_CN: add cpu-load Chinese version
Documentation/admin-guide: tainted-kernels: fix spelling mistake
MAINTAINERS: adjust kprobes.rst entry to new location
devices.txt: document rfkill allocation
PCI: correct flag name
docs: filesystems: vfs: correct flag name
docs: filesystems: vfs: correct sync_mode flag names
docs: path-lookup: markup fixes for emphasis
docs: path-lookup: more markup fixes
docs: path-lookup: fix HTML entity mojibake
CREDITS: Replace HTTP links with HTTPS ones
docs: process: Add an example for creating a fixes tag
doc/zh_CN: add Chinese translation prefer section
doc/zh_CN: add clearing-warn-once Chinese version
doc/zh_CN: add admin-guide index
doc:it_IT: process: coding-style.rst: Correct __maybe_unused compiler label
futex: MAINTAINERS: Re-add selftests directory
...
Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.
Deterministic algorithm:
For each file:
If not .svg:
For each line:
If doesn't contain `\bxmlns\b`:
For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
If both the HTTP and HTTPS versions
return 200 OK and serve the same content:
Replace HTTP with HTTPS.
Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Link: https://lore.kernel.org/r/20200627072935.62652-1-grandmaster@al2klimov.de
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The nommu-mmap.txt file provides description of user visible
behaviuour. So, move it to the admin-guide.
As it is already at the ReST, also rename it.
Suggested-by: Mike Rapoport <rppt@linux.ibm.com>
Suggested-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/3a63d1833b513700755c85bf3bda0a6c4ab56986.1592918949.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This documents the random directory, based on the behaviour seen in
drivers/char/random.c.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200623112514.10650-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Fix heading format warnings in admin-guide/sysctl/kernel.rst:
Documentation/admin-guide/sysctl/kernel.rst:339: WARNING: Title underline too short.
hung_task_all_cpu_backtrace:
================
Documentation/admin-guide/sysctl/kernel.rst:650: WARNING: Title underline too short.
oops_all_cpu_backtrace:
================
Fixes: 0ec9dc9bcb ("kernel/hung_task.c: introduce sysctl to print all traces when a hung task is detected")
Fixes: 60c958d8df ("panic: add sysctl to dump all CPUs backtraces on oops event")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/8af1cb77-4b5a-64b9-da5d-f6a95e537f99@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Usually when the kernel reaches an oops condition, it's a point of no
return; in case not enough debug information is available in the kernel
splat, one of the last resorts would be to collect a kernel crash dump
and analyze it. The problem with this approach is that in order to
collect the dump, a panic is required (to kexec-load the crash kernel).
When in an environment of multiple virtual machines, users may prefer to
try living with the oops, at least until being able to properly shutdown
their VMs / finish their important tasks.
This patch implements a way to collect a bit more debug details when an
oops event is reached, by printing all the CPUs backtraces through the
usage of NMIs (on architectures that support that). The sysctl added
(and documented) here was called "oops_all_cpu_backtrace", and when set
will (as the name suggests) dump all CPUs backtraces.
Far from ideal, this may be the last option though for users that for
some reason cannot panic on oops. Most of times oopses are clear enough
to indicate the kernel portion that must be investigated, but in virtual
environments it's possible to observe hypervisor/KVM issues that could
lead to oopses shown in other guests CPUs (like virtual APIC crashes).
This patch hence aims to help debug such complex issues without
resorting to kdump.
Signed-off-by: Guilherme G. Piccoli <gpiccoli@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Iurii Zaikin <yzaikin@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Matthew Wilcox <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200327224116.21030-1-gpiccoli@canonical.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 401c636a0e ("kernel/hung_task.c: show all hung tasks before
panic") introduced a change in that we started to show all CPUs
backtraces when a hung task is detected _and_ the sysctl/kernel
parameter "hung_task_panic" is set. The idea is good, because usually
when observing deadlocks (that may lead to hung tasks), the culprit is
another task holding a lock and not necessarily the task detected as
hung.
The problem with this approach is that dumping backtraces is a slightly
expensive task, specially printing that on console (and specially in
many CPU machines, as servers commonly found nowadays). So, users that
plan to collect a kdump to investigate the hung tasks and narrow down
the deadlock definitely don't need the CPUs backtrace on dmesg/console,
which will delay the panic and pollute the log (crash tool would easily
grab all CPUs traces with 'bt -a' command).
Also, there's the reciprocal scenario: some users may be interested in
seeing the CPUs backtraces but not have the system panic when a hung
task is detected. The current approach hence is almost as embedding a
policy in the kernel, by forcing the CPUs backtraces' dump (only) on
hung_task_panic.
This patch decouples the panic event on hung task from the CPUs
backtraces dump, by creating (and documenting) a new sysctl called
"hung_task_all_cpu_backtrace", analog to the approach taken on soft/hard
lockups, that have both a panic and an "all_cpu_backtrace" sysctl to
allow individual control. The new mechanism for dumping the CPUs
backtraces on hung task detection respects "hung_task_warnings" by not
dumping the traces in case there's no warnings left.
Signed-off-by: Guilherme G. Piccoli <gpiccoli@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: http://lkml.kernel.org/r/20200327223646.20779-1-gpiccoli@canonical.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Analogously to the introduction of panic_on_warn, this patch introduces
a kernel option named panic_on_taint in order to provide a simple and
generic way to stop execution and catch a coredump when the kernel gets
tainted by any given flag.
This is useful for debugging sessions as it avoids having to rebuild the
kernel to explicitly add calls to panic() into the code sites that
introduce the taint flags of interest.
For instance, if one is interested in proceeding with a post-mortem
analysis at the point a given code path is hitting a bad page (i.e.
unaccount_page_cache_page(), or slab_bug()), a coredump can be collected
by rebooting the kernel with 'panic_on_taint=0x20' amended to the
command line.
Another, perhaps less frequent, use for this option would be as a means
for assuring a security policy case where only a subset of taints, or no
single taint (in paranoid mode), is allowed for the running system. The
optional switch 'nousertaint' is handy in this particular scenario, as
it will avoid userspace induced crashes by writes to sysctl interface
/proc/sys/kernel/tainted causing false positive hits for such policies.
[akpm@linux-foundation.org: tweak kernel-parameters.txt wording]
Suggested-by: Qian Cai <cai@lca.pw>
Signed-off-by: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Bunk <bunk@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Takashi Iwai <tiwai@suse.de>
Link: http://lkml.kernel.org/r/20200515175502.146720-1-aquini@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge more updates from Andrew Morton:
"More mm/ work, plenty more to come
Subsystems affected by this patch series: slub, memcg, gup, kasan,
pagealloc, hugetlb, vmscan, tools, mempolicy, memblock, hugetlbfs,
thp, mmap, kconfig"
* akpm: (131 commits)
arm64: mm: use ARCH_HAS_DEBUG_WX instead of arch defined
x86: mm: use ARCH_HAS_DEBUG_WX instead of arch defined
riscv: support DEBUG_WX
mm: add DEBUG_WX support
drivers/base/memory.c: cache memory blocks in xarray to accelerate lookup
mm/thp: rename pmd_mknotpresent() as pmd_mkinvalid()
powerpc/mm: drop platform defined pmd_mknotpresent()
mm: thp: don't need to drain lru cache when splitting and mlocking THP
hugetlbfs: get unmapped area below TASK_UNMAPPED_BASE for hugetlbfs
sparc32: register memory occupied by kernel as memblock.memory
include/linux/memblock.h: fix minor typo and unclear comment
mm, mempolicy: fix up gup usage in lookup_node
tools/vm/page_owner_sort.c: filter out unneeded line
mm: swap: memcg: fix memcg stats for huge pages
mm: swap: fix vmstats for huge pages
mm: vmscan: limit the range of LRU type balancing
mm: vmscan: reclaim writepage is IO cost
mm: vmscan: determine anon/file pressure balance at the reclaim root
mm: balance LRU lists based on relative thrashing
mm: only count actual rotations as LRU reclaim cost
...
With the advent of fast random IO devices (SSDs, PMEM) and in-memory swap
devices such as zswap, it's possible for swap to be much faster than
filesystems, and for swapping to be preferable over thrashing filesystem
caches.
Allow setting swappiness - which defines the rough relative IO cost of
cache misses between page cache and swap-backed pages - to reflect such
situations by making the swap-preferred range configurable.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Link: http://lkml.kernel.org/r/20200520232525.798933-4-hannes@cmpxchg.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull networking updates from David Miller:
1) Allow setting bluetooth L2CAP modes via socket option, from Luiz
Augusto von Dentz.
2) Add GSO partial support to igc, from Sasha Neftin.
3) Several cleanups and improvements to r8169 from Heiner Kallweit.
4) Add IF_OPER_TESTING link state and use it when ethtool triggers a
device self-test. From Andrew Lunn.
5) Start moving away from custom driver versions, use the globally
defined kernel version instead, from Leon Romanovsky.
6) Support GRO vis gro_cells in DSA layer, from Alexander Lobakin.
7) Allow hard IRQ deferral during NAPI, from Eric Dumazet.
8) Add sriov and vf support to hinic, from Luo bin.
9) Support Media Redundancy Protocol (MRP) in the bridging code, from
Horatiu Vultur.
10) Support netmap in the nft_nat code, from Pablo Neira Ayuso.
11) Allow UDPv6 encapsulation of ESP in the ipsec code, from Sabrina
Dubroca. Also add ipv6 support for espintcp.
12) Lots of ReST conversions of the networking documentation, from Mauro
Carvalho Chehab.
13) Support configuration of ethtool rxnfc flows in bcmgenet driver,
from Doug Berger.
14) Allow to dump cgroup id and filter by it in inet_diag code, from
Dmitry Yakunin.
15) Add infrastructure to export netlink attribute policies to
userspace, from Johannes Berg.
16) Several optimizations to sch_fq scheduler, from Eric Dumazet.
17) Fallback to the default qdisc if qdisc init fails because otherwise
a packet scheduler init failure will make a device inoperative. From
Jesper Dangaard Brouer.
18) Several RISCV bpf jit optimizations, from Luke Nelson.
19) Correct the return type of the ->ndo_start_xmit() method in several
drivers, it's netdev_tx_t but many drivers were using
'int'. From Yunjian Wang.
20) Add an ethtool interface for PHY master/slave config, from Oleksij
Rempel.
21) Add BPF iterators, from Yonghang Song.
22) Add cable test infrastructure, including ethool interfaces, from
Andrew Lunn. Marvell PHY driver is the first to support this
facility.
23) Remove zero-length arrays all over, from Gustavo A. R. Silva.
24) Calculate and maintain an explicit frame size in XDP, from Jesper
Dangaard Brouer.
25) Add CAP_BPF, from Alexei Starovoitov.
26) Support terse dumps in the packet scheduler, from Vlad Buslov.
27) Support XDP_TX bulking in dpaa2 driver, from Ioana Ciornei.
28) Add devm_register_netdev(), from Bartosz Golaszewski.
29) Minimize qdisc resets, from Cong Wang.
30) Get rid of kernel_getsockopt and kernel_setsockopt in order to
eliminate set_fs/get_fs calls. From Christoph Hellwig.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2517 commits)
selftests: net: ip_defrag: ignore EPERM
net_failover: fixed rollback in net_failover_open()
Revert "tipc: Fix potential tipc_aead refcnt leak in tipc_crypto_rcv"
Revert "tipc: Fix potential tipc_node refcnt leak in tipc_rcv"
vmxnet3: allow rx flow hash ops only when rss is enabled
hinic: add set_channels ethtool_ops support
selftests/bpf: Add a default $(CXX) value
tools/bpf: Don't use $(COMPILE.c)
bpf, selftests: Use bpf_probe_read_kernel
s390/bpf: Use bcr 0,%0 as tail call nop filler
s390/bpf: Maintain 8-byte stack alignment
selftests/bpf: Fix verifier test
selftests/bpf: Fix sample_cnt shared between two threads
bpf, selftests: Adapt cls_redirect to call csum_level helper
bpf: Add csum_level helper for fixing up csum levels
bpf: Fix up bpf_skb_adjust_room helper's skb csum setting
sfc: add missing annotation for efx_ef10_try_update_nic_stats_vf()
crypto/chtls: IPv6 support for inline TLS
Crypto/chcr: Fixes a coccinile check error
Crypto/chcr: Fixes compilations warnings
...
set from Mauro toward the completion of the RST conversion. I *really*
hope we are getting close to the end of this. Meanwhile, those patches
reach pretty far afield to update document references around the tree;
there should be no actual code changes there. There will be, alas, more of
the usual trivial merge conflicts.
Beyond that we have more translations, improvements to the sphinx
scripting, a number of additions to the sysctl documentation, and lots of
fixes.
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Merge tag 'docs-5.8' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"A fair amount of stuff this time around, dominated by yet another
massive set from Mauro toward the completion of the RST conversion. I
*really* hope we are getting close to the end of this. Meanwhile,
those patches reach pretty far afield to update document references
around the tree; there should be no actual code changes there. There
will be, alas, more of the usual trivial merge conflicts.
Beyond that we have more translations, improvements to the sphinx
scripting, a number of additions to the sysctl documentation, and lots
of fixes"
* tag 'docs-5.8' of git://git.lwn.net/linux: (130 commits)
Documentation: fixes to the maintainer-entry-profile template
zswap: docs/vm: Fix typo accept_threshold_percent in zswap.rst
tracing: Fix events.rst section numbering
docs: acpi: fix old http link and improve document format
docs: filesystems: add info about efivars content
Documentation: LSM: Correct the basic LSM description
mailmap: change email for Ricardo Ribalda
docs: sysctl/kernel: document unaligned controls
Documentation: admin-guide: update bug-hunting.rst
docs: sysctl/kernel: document ngroups_max
nvdimm: fixes to maintainter-entry-profile
Documentation/features: Correct RISC-V kprobes support entry
Documentation/features: Refresh the arch support status files
Revert "docs: sysctl/kernel: document ngroups_max"
docs: move locking-specific documents to locking/
docs: move digsig docs to the security book
docs: move the kref doc into the core-api book
docs: add IRQ documentation at the core-api book
docs: debugging-via-ohci1394.txt: add it to the core-api book
docs: fix references for ipmi.rst file
...
This documents ignore-unaligned-usertrap, unaligned-dump-stack, and
unaligned-trap, based on arch/arc/kernel/unaligned.c,
arch/ia64/kernel/unaligned.c, and arch/parisc/kernel/unaligned.c.
While we're at it, integrate unaligned-memory-access.txt into the docs
tree.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200515212443.5012-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This reverts commit 2f4c33063a.
The changes here were fine, but there's a non-documentation change to
sysctl.c that makes messes elsewhere; those changes should have been done
independently.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
The goal is to be able to inherit the initial devconf parameters from the
current netns, ie the netns where this new netns has been created.
This is useful in a containers environment where /proc/sys is read only.
For example, if a pod is created with specifics devconf parameters and has
the capability to create netns, the user expects to get the same parameters
than his 'init_net', which is not the real init_net in this case.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This is a read-only export of NGROUPS_MAX, so this patch also changes
the declarations in kernel/sysctl.c to const.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20200515160222.7994-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Based on the firmware fallback mechanisms documentation and the
implementation in drivers/base/firmware_loader/fallback.c.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200429205757.8677-2-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Based on the ftrace documentation, the tp_printk boot parameter
documentation, and the implementation in kernel/trace/trace.c.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20200429205757.8677-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
- add SPDX header;
- add a document title;
- mark lists as such;
- mark code blocks and literals as such;
- adjust identation, whitespaces and blank lines;
- add to networking/index.rst.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
- add SPDX header;
- adjust titles and chapters, adding proper markups;
- mark code blocks and literals as such;
- mark lists as such;
- mark tables as such;
- use footnote markup;
- adjust identation, whitespaces and blank lines;
- add to networking/index.rst.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Based on the implementation in kernel/sysctl.c (the proc_do_cad_pid()
function), kernel/reboot.c, and include/linux/sched/signal.h.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200423183651.15365-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Greg Kroah-Hartman