kernel_arpi

Author	SHA1	Message	Date
Greg Kroah-Hartman	06d58f3cef	Merge 5.15.54 into android14-5.15 Changes in 5.15.54 mm/slub: add missing TID updates on slab deactivation mm/filemap: fix UAF in find_lock_entries Revert "selftests/bpf: Add test for bpf_timer overwriting crash" ALSA: usb-audio: Workarounds for Behringer UMC 204/404 HD ALSA: hda/realtek: Add quirk for Clevo L140PU ALSA: cs46xx: Fix missing snd_card_free() call at probe error can: bcm: use call_rcu() instead of costly synchronize_rcu() can: grcan: grcan_probe(): remove extra of_node_get() can: gs_usb: gs_usb_open/close(): fix memory leak can: m_can: m_can_chip_config(): actually enable internal timestamping can: m_can: m_can_{read_fifo,echo_tx_event}(): shift timestamp to full 32 bits can: mcp251xfd: mcp251xfd_regmap_crc_read(): improve workaround handling for mcp2517fd can: mcp251xfd: mcp251xfd_regmap_crc_read(): update workaround broken CRC on TBC register bpf: Fix incorrect verifier simulation around jmp32's jeq/jne bpf: Fix insufficient bounds propagation from adjust_scalar_min_max_vals usbnet: fix memory leak in error case net: rose: fix UAF bug caused by rose_t0timer_expiry netfilter: nft_set_pipapo: release elements in clone from abort path netfilter: nf_tables: stricter validation of element data btrfs: rename btrfs_alloc_chunk to btrfs_create_chunk btrfs: add additional parameters to btrfs_init_tree_ref/btrfs_init_data_ref btrfs: fix invalid delayed ref after subvolume creation failure btrfs: fix warning when freeing leaf after subvolume creation failure Input: cpcap-pwrbutton - handle errors from platform_get_irq() Input: goodix - change goodix_i2c_write() len parameter type to int Input: goodix - add a goodix.h header file Input: goodix - refactor reset handling Input: goodix - try not to touch the reset-pin on x86/ACPI devices dma-buf/poll: Get a file reference for outstanding fence callbacks btrfs: fix deadlock between chunk allocation and chunk btree modifications drm/i915: Disable bonding on gen12+ platforms drm/i915/gt: Register the migrate contexts with their engines drm/i915: Replace the unconditional clflush with drm_clflush_virt_range() PCI/portdrv: Rename pm_iter() to pcie_port_device_iter() PCI: pciehp: Ignore Link Down/Up caused by error-induced Hot Reset media: ir_toy: prevent device from hanging during transmit memory: renesas-rpc-if: Avoid unaligned bus access for HyperFlash ath11k: add hw_param for wakeup_mhi qed: Improve the stack space of filter_config() platform/x86: wmi: introduce helper to convert driver to WMI driver platform/x86: wmi: Replace read_takes_no_args with a flags field platform/x86: wmi: Fix driver->notify() vs ->probe() race mt76: mt7921: get rid of mt7921_mac_set_beacon_filter mt76: mt7921: introduce mt7921_mcu_set_beacon_filter utility routine mt76: mt7921: fix a possible race enabling/disabling runtime-pm bpf: Stop caching subprog index in the bpf_pseudo_func insn bpf, arm64: Use emit_addr_mov_i64() for BPF_PSEUDO_FUNC riscv: defconfig: enable DRM_NOUVEAU RISC-V: defconfigs: Set CONFIG_FB=y, for FB console net/mlx5e: Check action fwd/drop flag exists also for nic flows net/mlx5e: Split actions_match_supported() into a sub function net/mlx5e: TC, Reject rules with drop and modify hdr action net/mlx5e: TC, Reject rules with forward and drop actions ASoC: rt5682: Avoid the unexpected IRQ event during going to suspend ASoC: rt5682: Re-detect the combo jack after resuming ASoC: rt5682: Fix deadlock on resume netfilter: nf_tables: convert pktinfo->tprot_set to flags field netfilter: nft_payload: support for inner header matching / mangling netfilter: nft_payload: don't allow th access for fragments s390/boot: allocate amode31 section in decompressor s390/setup: use physical pointers for memblock_reserve() s390/setup: preserve memory at OLDMEM_BASE and OLDMEM_SIZE ibmvnic: init init_done_rc earlier ibmvnic: clear fop when retrying probe ibmvnic: Allow queueing resets during probe virtio-blk: avoid preallocating big SGL for data io_uring: ensure that fsnotify is always called block: use bdev_get_queue() in bio.c block: only mark bio as tracked if it really is tracked block: fix rq-qos breakage from skipping rq_qos_done_bio() stddef: Introduce struct_group() helper macro media: omap3isp: Use struct_group() for memcpy() region media: davinci: vpif: fix use-after-free on driver unbind mt76: mt76_connac: fix MCU_CE_CMD_SET_ROC definition error mt76: mt7921: do not always disable fw runtime-pm cxl/port: Hold port reference until decoder release clk: renesas: r9a07g044: Update multiplier and divider values for PLL2/3 KVM: x86/mmu: Use yield-safe TDP MMU root iter in MMU notifier unmapping KVM: x86/mmu: Use common TDP MMU zap helper for MMU notifier unmap hook scsi: qla2xxx: Move heartbeat handling from DPC thread to workqueue scsi: qla2xxx: Fix laggy FC remote port session recovery scsi: qla2xxx: edif: Replace list_for_each_safe with list_for_each_entry_safe scsi: qla2xxx: Fix crash during module load unload test gfs2: Fix gfs2_file_buffered_write endless loop workaround vdpa/mlx5: Avoid processing works if workqueue was destroyed btrfs: handle device lookup with btrfs_dev_lookup_args btrfs: add a btrfs_get_dev_args_from_path helper btrfs: use btrfs_get_dev_args_from_path in dev removal ioctls btrfs: remove device item and update super block in the same transaction drbd: add error handling support for add_disk() drbd: Fix double free problem in drbd_create_device drbd: fix an invalid memory access caused by incorrect use of list iterator drm/amd/display: Set min dcfclk if pipe count is 0 drm/amd/display: Fix by adding FPU protection for dcn30_internal_validate_bw NFSD: De-duplicate net_generic(nf->nf_net, nfsd_net_id) NFSD: COMMIT operations must not return NFS?ERR_INVAL riscv/mm: Add XIP_FIXUP for riscv_pfn_base iio: accel: mma8452: use the correct logic to get mma8452_data batman-adv: Use netif_rx(). mtd: spi-nor: Skip erase logic when SPI_NOR_NO_ERASE is set Compiler Attributes: add __alloc_size() for better bounds checking mm: vmalloc: introduce array allocation functions KVM: use __vcalloc for very large allocations btrfs: don't access possibly stale fs_info data in device_list_add KVM: s390x: fix SCK locking scsi: qla2xxx: Fix loss of NVMe namespaces after driver reload test powerpc/32: Don't use lmw/stmw for saving/restoring non volatile regs powerpc: flexible GPR range save/restore macros powerpc/tm: Fix more userspace r13 corruption serial: sc16is7xx: Clear RS485 bits in the shutdown bus: mhi: core: Use correctly sized arguments for bit field bus: mhi: Fix pm_state conversion to string stddef: Introduce DECLARE_FLEX_ARRAY() helper uapi/linux/stddef.h: Add include guards ASoC: rt5682: move clk related code to rt5682_i2c_probe ASoC: rt5682: fix an incorrect NULL check on list iterator drm/amd/vcn: fix an error msg on vcn 3.0 KVM: Don't create VM debugfs files outside of the VM directory tty: n_gsm: Modify CR,PF bit when config requester tty: n_gsm: Save dlci address open status when config requester tty: n_gsm: fix frame reception handling ALSA: usb-audio: add mapping for MSI MPG X570S Carbon Max Wifi. ALSA: usb-audio: add mapping for MSI MAG X570S Torpedo MAX. tty: n_gsm: fix missing update of modem controls after DLCI open btrfs: zoned: encapsulate inode locking for zoned relocation btrfs: zoned: use dedicated lock for data relocation KVM: Initialize debugfs_dentry when a VM is created to avoid NULL deref mm/hwpoison: mf_mutex for soft offline and unpoison mm/hwpoison: avoid the impact of hwpoison_filter() return value on mce handler mm/memory-failure.c: fix race with changing page compound again mm/hwpoison: fix race between hugetlb free/demotion and memory_failure_hugetlb() tty: n_gsm: fix invalid use of MSC in advanced option tty: n_gsm: fix sometimes uninitialized warning in gsm_dlci_modem_output() serial: 8250_mtk: Make sure to select the right FEATURE_SEL tty: n_gsm: fix invalid gsmtty_write_room() result drm/amd: Refactor `amdgpu_aspm` to be evaluated per device drm/amdgpu: vi: disable ASPM on Intel Alder Lake based systems drm/i915: Fix a race between vma / object destruction and unbinding drm/mediatek: Use mailbox rx_callback instead of cmdq_task_cb drm/mediatek: Remove the pointer of struct cmdq_client drm/mediatek: Detect CMDQ execution timeout drm/mediatek: Add cmdq_handle in mtk_crtc drm/mediatek: Add vblank register/unregister callback functions Bluetooth: protect le accept and resolv lists with hdev->lock Bluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_event io_uring: avoid io-wq -EAGAIN looping for !IOPOLL irqchip/gic-v3: Ensure pseudo-NMIs have an ISB between ack and handling irqchip/gic-v3: Refactor ISB + EOIR at ack time rxrpc: Fix locking issue dt-bindings: soc: qcom: smd-rpm: Add compatible for MSM8953 SoC dt-bindings: soc: qcom: smd-rpm: Fix missing MSM8936 compatible module: change to print useful messages from elf_validity_check() module: fix [e_shstrndx].sh_size=0 OOB access iommu/vt-d: Fix PCI bus rescan device hot add fbdev: fbmem: Fix logo center image dx issue fbmem: Check virtual screen sizes in fb_set_var() fbcon: Disallow setting font bigger than screen size fbcon: Prevent that screen size is smaller than font size PM: runtime: Redefine pm_runtime_release_supplier() memregion: Fix memregion_free() fallback definition video: of_display_timing.h: include errno.h powerpc/powernv: delay rng platform device creation until later in boot net: dsa: qca8k: reset cpu port on MTU change can: kvaser_usb: replace run-time checks with struct kvaser_usb_driver_info can: kvaser_usb: kvaser_usb_leaf: fix CAN clock frequency regression can: kvaser_usb: kvaser_usb_leaf: fix bittiming limits xfs: remove incorrect ASSERT in xfs_rename Revert "serial: sc16is7xx: Clear RS485 bits in the shutdown" btrfs: fix error pointer dereference in btrfs_ioctl_rm_dev_v2() virtio-blk: modify the value type of num in virtio_queue_rq() btrfs: fix use of uninitialized variable at rm device ioctl tty: n_gsm: fix encoding of command/response bit ARM: meson: Fix refcount leak in meson_smp_prepare_cpus pinctrl: sunxi: a83t: Fix NAND function name for some pins ASoC: rt711: Add endianness flag in snd_soc_component_driver ASoC: rt711-sdca: Add endianness flag in snd_soc_component_driver ASoC: codecs: rt700/rt711/rt711-sdca: resume bus/codec in .set_jack_detect arm64: dts: qcom: msm8994: Fix CPU6/7 reg values arm64: dts: qcom: sdm845: use dispcc AHB clock for mdss node ARM: mxs_defconfig: Enable the framebuffer arm64: dts: imx8mp-evk: correct mmc pad settings arm64: dts: imx8mp-evk: correct the uart2 pinctl value arm64: dts: imx8mp-evk: correct gpio-led pad settings arm64: dts: imx8mp-evk: correct vbus pad settings arm64: dts: imx8mp-evk: correct eqos pad settings arm64: dts: imx8mp-evk: correct I2C1 pad settings arm64: dts: imx8mp-evk: correct I2C3 pad settings arm64: dts: imx8mp-phyboard-pollux-rdk: correct uart pad settings arm64: dts: imx8mp-phyboard-pollux-rdk: correct eqos pad settings arm64: dts: imx8mp-phyboard-pollux-rdk: correct i2c2 & mmc settings pinctrl: sunxi: sunxi_pconf_set: use correct offset arm64: dts: qcom: msm8992-*: Fix vdd_lvs1_2-supply typo ARM: at91: pm: use proper compatible for sama5d2's rtc ARM: at91: pm: use proper compatibles for sam9x60's rtc and rtt ARM: at91: pm: use proper compatibles for sama7g5's rtc and rtt ARM: dts: at91: sam9x60ek: fix eeprom compatible and size ARM: dts: at91: sama5d2_icp: fix eeprom compatibles ARM: at91: fix soc detection for SAM9X60 SiPs xsk: Clear page contiguity bit when unmapping pool i2c: piix4: Fix a memory leak in the EFCH MMIO support i40e: Fix dropped jumbo frames statistics i40e: Fix VF's MAC Address change on VM ARM: dts: stm32: use usbphyc ck_usbo_48m as USBH OHCI clock on stm32mp151 ARM: dts: stm32: add missing usbh clock and fix clk order on stm32mp15 ibmvnic: Properly dispose of all skbs during a failover. selftests: forwarding: fix flood_unicast_test when h2 supports IFF_UNICAST_FLT selftests: forwarding: fix learning_test when h1 supports IFF_UNICAST_FLT selftests: forwarding: fix error message in learning_test r8169: fix accessing unset transport header i2c: cadence: Unregister the clk notifier in error path dmaengine: imx-sdma: Allow imx8m for imx7 FW revs misc: rtsx_usb: fix use of dma mapped buffer for usb bulk transfer misc: rtsx_usb: use separate command and response buffers misc: rtsx_usb: set return value in rsp_buf alloc err path Revert "mm/memory-failure.c: fix race with changing page compound again" Revert "serial: 8250_mtk: Make sure to select the right FEATURE_SEL" dt-bindings: dma: allwinner,sun50i-a64-dma: Fix min/max typo ida: don't use BUG_ON() for debugging dmaengine: pl330: Fix lockdep warning about non-static key dmaengine: lgm: Fix an error handling path in intel_ldma_probe() dmaengine: at_xdma: handle errors of at_xdmac_alloc_desc() correctly dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route_allocate dmaengine: qcom: bam_dma: fix runtime PM underflow dmaengine: ti: Add missing put_device in ti_dra7_xbar_route_allocate dmaengine: idxd: force wq context cleanup on device disable path selftests/net: fix section name when using xdp_dummy.o Linux 5.15.54 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I3ca4c0aa09a3bea6969c7a127d833034a123f437	2022-07-13 19:41:43 +02:00
Paolo Bonzini	c33904fd1e	mm: vmalloc: introduce array allocation functions [ Upstream commit a8749a35c39903120ec421ef2525acc8e0daa55c ] Linux has dozens of occurrences of vmalloc(array_size()) and vzalloc(array_size()). Allow to simplify the code by providing vmalloc_array and vcalloc, as well as the underscored variants that let the caller specify the GFP flags. Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>	2022-07-12 16:35:01 +02:00
Greg Kroah-Hartman	28f0c67d40	Merge 5.15.44 into android14-5.15 Changes in 5.15.44 HID: amd_sfh: Add support for sensor discovery KVM: x86/mmu: fix NULL pointer dereference on guest INVPCID ice: fix crash at allocation failure ACPI: sysfs: Fix BERT error region memory mapping MAINTAINERS: co-maintain random.c MAINTAINERS: add git tree for random.c lib/crypto: blake2s: include as built-in lib/crypto: blake2s: move hmac construction into wireguard lib/crypto: sha1: re-roll loops to reduce code size lib/crypto: blake2s: avoid indirect calls to compression function for Clang CFI random: document add_hwgenerator_randomness() with other input functions random: remove unused irq_flags argument from add_interrupt_randomness() random: use BLAKE2s instead of SHA1 in extraction random: do not sign extend bytes for rotation when mixing random: do not re-init if crng_reseed completes before primary init random: mix bootloader randomness into pool random: harmonize "crng init done" messages random: use IS_ENABLED(CONFIG_NUMA) instead of ifdefs random: early initialization of ChaCha constants random: avoid superfluous call to RDRAND in CRNG extraction random: don't reset crng_init_cnt on urandom_read() random: fix typo in comments random: cleanup poolinfo abstraction random: cleanup integer types random: remove incomplete last_data logic random: remove unused extract_entropy() reserved argument random: rather than entropy_store abstraction, use global random: remove unused OUTPUT_POOL constants random: de-duplicate INPUT_POOL constants random: prepend remaining pool constants with POOL_ random: cleanup fractional entropy shift constants random: access input_pool_data directly rather than through pointer random: selectively clang-format where it makes sense random: simplify arithmetic function flow in account() random: continually use hwgenerator randomness random: access primary_pool directly rather than through pointer random: only call crng_finalize_init() for primary_crng random: use computational hash for entropy extraction random: simplify entropy debiting random: use linear min-entropy accumulation crediting random: always wake up entropy writers after extraction random: make credit_entropy_bits() always safe random: remove use_input_pool parameter from crng_reseed() random: remove batched entropy locking random: fix locking in crng_fast_load() random: use RDSEED instead of RDRAND in entropy extraction random: get rid of secondary crngs random: inline leaves of rand_initialize() random: ensure early RDSEED goes through mixer on init random: do not xor RDRAND when writing into /dev/random random: absorb fast pool into input pool after fast load random: use simpler fast key erasure flow on per-cpu keys random: use hash function for crng_slow_load() random: make more consistent use of integer types random: remove outdated INT_MAX >> 6 check in urandom_read() random: zero buffer after reading entropy from userspace random: fix locking for crng_init in crng_reseed() random: tie batched entropy generation to base_crng generation random: remove ifdef'd out interrupt bench random: remove unused tracepoints random: add proper SPDX header random: deobfuscate irq u32/u64 contributions random: introduce drain_entropy() helper to declutter crng_reseed() random: remove useless header comment random: remove whitespace and reorder includes random: group initialization wait functions random: group crng functions random: group entropy extraction functions random: group entropy collection functions random: group userspace read/write functions random: group sysctl functions random: rewrite header introductory comment random: defer fast pool mixing to worker random: do not take pool spinlock at boot random: unify early init crng load accounting random: check for crng_init == 0 in add_device_randomness() random: pull add_hwgenerator_randomness() declaration into random.h random: clear fast pool, crng, and batches in cpuhp bring up random: round-robin registers as ulong, not u32 random: only wake up writers after zap if threshold was passed random: cleanup UUID handling random: unify cycles_t and jiffies usage and types random: do crng pre-init loading in worker rather than irq random: give sysctl_random_min_urandom_seed a more sensible value random: don't let 644 read-only sysctls be written to random: replace custom notifier chain with standard one random: use SipHash as interrupt entropy accumulator random: make consistent usage of crng_ready() random: reseed more often immediately after booting random: check for signal and try earlier when generating entropy random: skip fast_init if hwrng provides large chunk of entropy random: treat bootloader trust toggle the same way as cpu trust toggle random: re-add removed comment about get_random_{u32,u64} reseeding random: mix build-time latent entropy into pool at init random: do not split fast init input in add_hwgenerator_randomness() random: do not allow user to keep crng key around on stack random: check for signal_pending() outside of need_resched() check random: check for signals every PAGE_SIZE chunk of /dev/[u]random random: allow partial reads if later user copies fail random: make random_get_entropy() return an unsigned long random: document crng_fast_key_erasure() destination possibility random: fix sysctl documentation nits init: call time_init() before rand_initialize() ia64: define get_cycles macro for arch-override s390: define get_cycles macro for arch-override parisc: define get_cycles macro for arch-override alpha: define get_cycles macro for arch-override powerpc: define get_cycles macro for arch-override timekeeping: Add raw clock fallback for random_get_entropy() m68k: use fallback for random_get_entropy() instead of zero riscv: use fallback for random_get_entropy() instead of zero mips: use fallback for random_get_entropy() instead of just c0 random arm: use fallback for random_get_entropy() instead of zero nios2: use fallback for random_get_entropy() instead of zero x86/tsc: Use fallback for random_get_entropy() instead of zero um: use fallback for random_get_entropy() instead of zero sparc: use fallback for random_get_entropy() instead of zero xtensa: use fallback for random_get_entropy() instead of zero random: insist on random_get_entropy() existing in order to simplify random: do not use batches when !crng_ready() random: use first 128 bits of input as fast init random: do not pretend to handle premature next security model random: order timer entropy functions below interrupt functions random: do not use input pool from hard IRQs random: help compiler out with fast_mix() by using simpler arguments siphash: use one source of truth for siphash permutations random: use symbolic constants for crng_init states random: avoid initializing twice in credit race random: move initialization out of reseeding hot path random: remove ratelimiting for in-kernel unseeded randomness random: use proper jiffies comparison macro random: handle latent entropy and command line from random_init() random: credit architectural init the exact amount random: use static branch for crng_ready() random: remove extern from functions in header random: use proper return types on get_random_{int,long}_wait() random: make consistent use of buf and len random: move initialization functions out of hot pages random: move randomize_page() into mm where it belongs random: unify batched entropy implementations random: convert to using fops->read_iter() random: convert to using fops->write_iter() random: wire up fops->splice_{read,write}_iter() random: check for signals after page of pool writes ALSA: ctxfi: Add SB046x PCI ID Linux 5.15.44 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I2d874cba14f13379fc5f874e72634c9179b28742	2022-06-14 11:49:05 +02:00
Jason A. Donenfeld	64cb7f01dd	random: move randomize_page() into mm where it belongs commit 5ad7dd882e45d7fe432c32e896e2aaa0b21746ea upstream. randomize_page is an mm function. It is documented like one. It contains the history of one. It has the naming convention of one. It looks just like another very similar function in mm, randomize_stack_top(). And it has always been maintained and updated by mm people. There is no need for it to be in random.c. In the "which shape does not look like the other ones" test, pointing to randomize_page() is correct. So move randomize_page() into mm/util.c, right next to the similar randomize_stack_top() function. This commit contains no actual code changes. Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2022-05-30 09:29:17 +02:00
Greg Kroah-Hartman	16f06ae351	Merge 5.15.27 into android-5.15 Changes in 5.15.27 mac80211_hwsim: report NOACK frames in tx_status mac80211_hwsim: initialize ieee80211_tx_info at hw_scan_work i2c: bcm2835: Avoid clock stretching timeouts ASoC: rt5668: do not block workqueue if card is unbound ASoC: rt5682: do not block workqueue if card is unbound regulator: core: fix false positive in regulator_late_cleanup() Input: clear BTN_RIGHT/MIDDLE on buttonpads btrfs: get rid of warning on transaction commit when using flushoncommit KVM: arm64: vgic: Read HW interrupt pending state from the HW block: loop:use kstatfs.f_bsize of backing file to set discard granularity tipc: fix a bit overflow in tipc_crypto_key_rcv() cifs: do not use uninitialized data in the owner/group sid cifs: fix double free race when mount fails in cifs_get_root() HID: amd_sfh: Handle amd_sfh work buffer in PM ops HID: amd_sfh: Add functionality to clear interrupts HID: amd_sfh: Add interrupt handler to process interrupts cifs: modefromsids must add an ACE for authenticated users selftests/seccomp: Fix seccomp failure by adding missing headers drm/amd/pm: correct UMD pstate clocks for Dimgrey Cavefish and Beige Goby selftests/ftrace: Do not trace do_softirq because of PREEMPT_RT dmaengine: shdma: Fix runtime PM imbalance on error i2c: cadence: allow COMPILE_TEST i2c: imx: allow COMPILE_TEST i2c: qup: allow COMPILE_TEST net: usb: cdc_mbim: avoid altsetting toggling for Telit FN990 block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern usb: gadget: don't release an existing dev->buf usb: gadget: clear related members when goto fail exfat: reuse exfat_inode_info variable instead of calling EXFAT_I() exfat: fix i_blocks for files truncated over 4 GiB tracing: Add test for user space strings when filtering on string pointers arm64: Mark start_backtrace() notrace and NOKPROBE_SYMBOL serial: stm32: prevent TDR register overwrite when sending x_char ext4: drop ineligible txn start stop APIs ext4: simplify updating of fast commit stats ext4: fast commit may not fallback for ineligible commit ext4: fast commit may miss file actions sched/fair: Fix fault in reweight_entity ata: pata_hpt37x: fix PCI clock detection drm/amdgpu: check vm ready by amdgpu_vm->evicting flag tracing: Add ustring operation to filtering string pointers ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report() NFSD: Have legacy NFSD WRITE decoders use xdr_stream_subsegment() NFSD: Fix zero-length NFSv3 WRITEs io_uring: fix no lock protection for ctx->cq_extra tools/resolve_btf_ids: Close ELF file on error mtd: spi-nor: Fix mtd size for s3an flashes MIPS: fix local_{add,sub}_return on MIPS64 signal: In get_signal test for signal_group_exit every time through the loop PCI: mediatek-gen3: Disable DVFSRC voltage request PCI: rcar: Check if device is runtime suspended instead of __clk_is_enabled() PCI: dwc: Do not remap invalid res PCI: aardvark: Fix checking for MEM resource type KVM: VMX: Don't unblock vCPU w/ Posted IRQ if IRQs are disabled in guest KVM: s390: Ensure kvm_arch_no_poll() is read once when blocking vCPU KVM: VMX: Read Posted Interrupt "control" exactly once per loop iteration KVM: X86: Ensure that dirty PDPTRs are loaded KVM: x86: Handle 32-bit wrap of EIP for EMULTYPE_SKIP with flat code seg KVM: x86: Exit to userspace if emulation prepared a completion callback i3c: fix incorrect address slot lookup on 64-bit i3c/master/mipi-i3c-hci: Fix a potentially infinite loop in 'hci_dat_v1_get_index()' tracing: Do not let synth_events block other dyn_event systems during create Input: ti_am335x_tsc - set ADCREFM for X configuration Input: ti_am335x_tsc - fix STEPCONFIG setup for Z2 PCI: mvebu: Check for errors from pci_bridge_emul_init() call PCI: mvebu: Do not modify PCI IO type bits in conf_write PCI: mvebu: Fix support for bus mastering and PCI_COMMAND on emulated bridge PCI: mvebu: Fix configuring secondary bus of PCIe Root Port via emulated bridge PCI: mvebu: Setup PCIe controller to Root Complex mode PCI: mvebu: Fix support for PCI_BRIDGE_CTL_BUS_RESET on emulated bridge PCI: mvebu: Fix support for PCI_EXP_DEVCTL on emulated bridge PCI: mvebu: Fix support for PCI_EXP_RTSTA on emulated bridge PCI: mvebu: Fix support for DEVCAP2, DEVCTL2 and LNKCTL2 registers on emulated bridge NFSD: Fix verifier returned in stable WRITEs Revert "nfsd: skip some unnecessary stats in the v4 case" nfsd: fix crash on COPY_NOTIFY with special stateid x86/hyperv: Properly deal with empty cpumasks in hyperv_flush_tlb_multi() drm/i915: don't call free_mmap_offset when purging SUNRPC: Fix sockaddr handling in the svc_xprt_create_error trace point SUNRPC: Fix sockaddr handling in svcsock_accept_class trace points drm/sun4i: dw-hdmi: Fix missing put_device() call in sun8i_hdmi_phy_get drm/atomic: Check new_crtc_state->active to determine if CRTC needs disable in self refresh mode ntb_hw_switchtec: Fix pff ioread to read into mmio_part_cfg_all ntb_hw_switchtec: Fix bug with more than 32 partitions drm/amdkfd: Check for null pointer after calling kmemdup drm/amdgpu: use spin_lock_irqsave to avoid deadlock by local interrupt i3c: master: dw: check return of dw_i3c_master_get_free_pos() dma-buf: cma_heap: Fix mutex locking section tracing/uprobes: Check the return value of kstrdup() for tu->filename tracing/probes: check the return value of kstrndup() for pbuf mm: defer kmemleak object creation of module_alloc() kasan: fix quarantine conflicting with init_on_free selftests/vm: make charge_reserved_hugetlb.sh work with existing cgroup setting hugetlbfs: fix off-by-one error in hugetlb_vmdelete_list() drm/amdgpu/display: Only set vblank_disable_immediate when PSR is not enabled drm/amdgpu: filter out radeon PCI device IDs drm/amdgpu: filter out radeon secondary ids as well drm/amd/display: Use adjusted DCN301 watermarks drm/amd/display: move FPU associated DSC code to DML folder ethtool: Fix link extended state for big endian octeontx2-af: Optimize KPU1 processing for variable-length headers octeontx2-af: Reset PTP config in FLR handler octeontx2-af: cn10k: RPM hardware timestamp configuration octeontx2-af: cn10k: Use appropriate register for LMAC enable octeontx2-af: Adjust LA pointer for cpt parse header octeontx2-af: Add KPU changes to parse NGIO as separate layer net/mlx5e: IPsec: Refactor checksum code in tx data path net/mlx5e: IPsec: Fix crypto offload for non TCP/UDP encapsulated traffic bpf: Use u64_stats_t in struct bpf_prog_stats bpf: Fix possible race in inc_misses_counter drm/amd/display: Update watermark values for DCN301 drm: mxsfb: Set fallback bus format when the bridge doesn't provide one drm: mxsfb: Fix NULL pointer dereference riscv/mm: Add XIP_FIXUP for phys_ram_base drm/i915/display: split out dpt out of intel_display.c drm/i915/display: Move DRRS code its own file drm/i915: Disable DRRS on IVB/HSW port != A gve: Recording rx queue before sending to napi net: dsa: ocelot: seville: utilize of_mdiobus_register net: dsa: seville: register the mdiobus under devres ibmvnic: don't release napi in __ibmvnic_open() of: net: move of_net under net/ net: ethernet: litex: Add the dependency on HAS_IOMEM drm/mediatek: mtk_dsi: Reset the dsi0 hardware cifs: protect session channel fields with chan_lock cifs: fix confusing unneeded warning message on smb2.1 and earlier drm/amd/display: Fix stream->link_enc unassigned during stream removal bnxt_en: Fix occasional ethtool -t loopback test failures drm/amd/display: For vblank_disable_immediate, check PSR is really used PCI: mvebu: Fix device enumeration regression net: of: fix stub of_net helpers for CONFIG_NET=n ALSA: intel_hdmi: Fix reference to PCM buffer address ucounts: Fix systemd LimitNPROC with private users regression riscv/efi_stub: Fix get_boot_hartid_from_fdt() return value riscv: Fix config KASAN && SPARSEMEM && !SPARSE_VMEMMAP riscv: Fix config KASAN && DEBUG_VIRTUAL iwlwifi: mvm: check debugfs_dir ptr before use ASoC: ops: Shift tested values in snd_soc_put_volsw() by +min iommu/vt-d: Fix double list_add when enabling VMD in scalable mode iommu/amd: Recover from event log overflow drm/i915: s/JSP2/ICP2/ PCH drm/amd/display: Reduce dmesg error to a debug print xen/netfront: destroy queues before real_num_tx_queues is zeroed thermal: core: Fix TZ_GET_TRIP NULL pointer dereference mac80211: fix EAPoL rekey fail in 802.3 rx path blktrace: fix use after free for struct blk_trace ntb: intel: fix port config status offset for SPR mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls xfrm: fix MTU regression netfilter: fix use-after-free in __nf_register_net_hook() bpf, sockmap: Do not ignore orig_len parameter xfrm: fix the if_id check in changelink xfrm: enforce validity of offload input flags e1000e: Correct NVM checksum verification flow net: fix up skbs delta_truesize in UDP GRO frag_list netfilter: nf_queue: don't assume sk is full socket netfilter: nf_queue: fix possible use-after-free netfilter: nf_queue: handle socket prefetch batman-adv: Request iflink once in batadv-on-batadv check batman-adv: Request iflink once in batadv_get_real_netdevice batman-adv: Don't expect inter-netns unique iflink indices net: ipv6: ensure we call ipv6_mc_down() at most once net: dcb: flush lingering app table entries for unregistered devices net: ipa: add an interconnect dependency net/smc: fix connection leak net/smc: fix unexpected SMC_CLC_DECL_ERR_REGRMB error generated by client net/smc: fix unexpected SMC_CLC_DECL_ERR_REGRMB error cause by server btrfs: fix ENOSPC failure when attempting direct IO write into NOCOW range mac80211: fix forwarded mesh frames AC & queue selection net: stmmac: fix return value of __setup handler mac80211: treat some SAE auth steps as final iavf: Fix missing check for running netdev net: sxgbe: fix return value of __setup handler ibmvnic: register netdev after init of adapter net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe() ixgbe: xsk: change !netif_carrier_ok() handling in ixgbe_xmit_zc() iavf: Fix deadlock in iavf_reset_task efivars: Respect "block" flag in efivar_entry_set_safe() auxdisplay: lcd2s: Fix lcd2s_redefine_char() feature firmware: arm_scmi: Remove space in MODULE_ALIAS name ASoC: cs4265: Fix the duplicated control name auxdisplay: lcd2s: Fix memory leak in ->remove() auxdisplay: lcd2s: Use proper API to free the instance of charlcd object can: gs_usb: change active_channels's type from atomic_t to u8 iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find arm64: dts: rockchip: Switch RK3399-Gru DP to SPDIF output igc: igc_read_phy_reg_gpy: drop premature return ARM: Fix kgdb breakpoint for Thumb2 mips: setup: fix setnocoherentio() boolean setting ARM: 9182/1: mmu: fix returns from early_param() and __setup() functions mptcp: Correctly set DATA_FIN timeout when number of retransmits is large selftests: mlxsw: tc_police_scale: Make test more robust pinctrl: sunxi: Use unique lockdep classes for IRQs igc: igc_write_phy_reg_gpy: drop premature return ibmvnic: free reset-work-item when flushing memfd: fix F_SEAL_WRITE after shmem huge page allocated s390/extable: fix exception table sorting sched: Fix yet more sched_fork() races arm64: dts: juno: Remove GICv2m dma-range iommu/amd: Fix I/O page table memory leak MIPS: ralink: mt7621: do memory detection on KSEG1 ARM: dts: switch timer config to common devkit8000 devicetree ARM: dts: Use 32KiHz oscillator on devkit8000 soc: fsl: guts: Revert commit `3c0d64e867` soc: fsl: guts: Add a missing memory allocation failure check soc: fsl: qe: Check of ioremap return value netfilter: nf_tables: prefer kfree_rcu(ptr, rcu) variant ARM: tegra: Move panels to AUX bus can: etas_es58x: change opened_channel_cnt's type from atomic_t to u8 net: stmmac: enhance XDP ZC driver level switching performance net: stmmac: only enable DMA interrupts when ready ibmvnic: initialize rc before completing wait ibmvnic: define flush_reset_queue helper ibmvnic: complete init_done on transport events net: chelsio: cxgb3: check the return value of pci_find_capability() net: sparx5: Fix add vlan when invalid operation iavf: Refactor iavf state machine tracking iavf: Add __IAVF_INIT_FAILED state iavf: Combine init and watchdog state machines iavf: Add trace while removing device iavf: Rework mutexes for better synchronisation iavf: Add helper function to go from pci_dev to adapter iavf: Fix kernel BUG in free_msi_irqs iavf: Add waiting so the port is initialized in remove iavf: Fix init state closure on remove iavf: Fix locking for VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS iavf: Fix race in init state iavf: Fix __IAVF_RESETTING state usage drm/i915/guc/slpc: Correct the param count for unset param drm/bridge: ti-sn65dsi86: Properly undo autosuspend e1000e: Fix possible HW unit hang after an s0ix exit MIPS: ralink: mt7621: use bitwise NOT instead of logical nl80211: Handle nla_memdup failures in handle_nan_filter drm/amdgpu: fix suspend/resume hang regression net: dcb: disable softirqs in dcbnl_flush_dev() selftests: mlxsw: resource_scale: Fix return value net: stmmac: perserve TX and RX coalesce value during XDP setup iavf: do not override the adapter state in the watchdog task (again) iavf: missing unlocks in iavf_watchdog_task() MAINTAINERS: adjust file entry for of_net.c after movement Input: elan_i2c - move regulator_[en\|dis]able() out of elan_[en\|dis]able_power() Input: elan_i2c - fix regulator enable count imbalance after suspend/resume Input: samsung-keypad - properly state IOMEM dependency HID: add mapping for KEY_DICTATE HID: add mapping for KEY_ALL_APPLICATIONS tracing/histogram: Fix sorting on old "cpu" value tracing: Fix return value of __setup handlers btrfs: fix lost prealloc extents beyond eof after full fsync btrfs: fix relocation crash due to premature return from btrfs_commit_transaction() btrfs: do not WARN_ON() if we have PageError set btrfs: qgroup: fix deadlock between rescan worker and remove qgroup btrfs: add missing run of delayed items after unlink during log replay btrfs: do not start relocation until in progress drops are done Revert "xfrm: xfrm_state_mtu should return at least 1280 for ipv6" proc: fix documentation and description of pagemap KVM: x86/mmu: Passing up the error state of mmu_alloc_shadow_roots() hamradio: fix macro redefine warning Linux 5.15.27 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: Ie338dd23e0eb61feb540b4256b5d1840fee4db84	2022-03-17 14:02:09 +01:00
Daniel Borkmann	261eff11ad	mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls commit 0708a0afe291bdfe1386d74d5ec1f0c27e8b9168 upstream. syzkaller was recently triggering an oversized kvmalloc() warning via xdp_umem_create(). The triggered warning was added back in `7661809d49` ("mm: don't allow oversized kvmalloc() calls"). The rationale for the warning for huge kvmalloc sizes was as a reaction to a security bug where the size was more than UINT_MAX but not everything was prepared to handle unsigned long sizes. Anyway, the AF_XDP related call trace from this syzkaller report was: kvmalloc include/linux/mm.h:806 [inline] kvmalloc_array include/linux/mm.h:824 [inline] kvcalloc include/linux/mm.h:829 [inline] xdp_umem_pin_pages net/xdp/xdp_umem.c:102 [inline] xdp_umem_reg net/xdp/xdp_umem.c:219 [inline] xdp_umem_create+0x6a5/0xf00 net/xdp/xdp_umem.c:252 xsk_setsockopt+0x604/0x790 net/xdp/xsk.c:1068 __sys_setsockopt+0x1fd/0x4e0 net/socket.c:2176 __do_sys_setsockopt net/socket.c:2187 [inline] __se_sys_setsockopt net/socket.c:2184 [inline] __x64_sys_setsockopt+0xb5/0x150 net/socket.c:2184 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Björn mentioned that requests for >2GB allocation can still be valid: The structure that is being allocated is the page-pinning accounting. AF_XDP has an internal limit of U32_MAX pages, which is a lot, but still fewer than what memcg allows (PAGE_COUNTER_MAX is a LONG_MAX/ PAGE_SIZE on 64 bit systems). [...] I could just change from U32_MAX to INT_MAX, but as I stated earlier that has a hacky feeling to it. [...] From my perspective, the code isn't broken, with the memcg limits in consideration. [...] Linus says: [...] Pretty much every time this has come up, the kernel warning has shown that yes, the code was broken and there really wasn't a reason for doing allocations that big. Of course, some people would be perfectly fine with the allocation failing, they just don't want the warning. I didn't want __GFP_NOWARN to shut it up originally because I wanted people to see all those cases, but these days I think we can just say "yeah, people can shut it up explicitly by saying 'go ahead and fail this allocation, don't warn about it'". So enough time has passed that by now I'd certainly be ok with [it]. Thus allow call-sites to silence such userspace triggered splats if the allocation requests have __GFP_NOWARN. For xdp_umem_pin_pages()'s call to kvcalloc() this is already the case, so nothing else needed there. Fixes: `7661809d49` ("mm: don't allow oversized kvmalloc() calls") Reported-by: syzbot+11421fbbff99b989670e@syzkaller.appspotmail.com Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Tested-by: syzbot+11421fbbff99b989670e@syzkaller.appspotmail.com Cc: Björn Töpel <bjorn@kernel.org> Cc: Magnus Karlsson <magnus.karlsson@intel.com> Cc: Willy Tarreau <w@1wt.eu> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Jakub Kicinski <kuba@kernel.org> Cc: David S. Miller <davem@davemloft.net> Link: https://lore.kernel.org/bpf/CAJ+HfNhyfsT5cS_U9EC213ducHs9k9zNxX9+abqC0kTrPbQ0gg@mail.gmail.com Link: https://lore.kernel.org/bpf/20211201202905.b9892171e3f5b9a60f9da251@linux-foundation.org Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Ackd-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2022-03-08 19:12:44 +01:00
Kuan-Ying Lee	e13e55eae1	ANDROID: syscall_check: add vendor hook for mmap syscall Through this vendor hook, we can get the timing to check current running task for the validation of its credential and related operations. Bug: 191291287 Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Change-Id: If20bd8bb8311ad10a374033734fbdc7ef61a7704 (cherry picked from commit `a5543c9cd7`)	2021-10-29 14:20:12 +08:00
Chen Jun	bcbda81020	mm: fix uninitialized use in overcommit_policy_handler We get an unexpected value of /proc/sys/vm/overcommit_memory after running the following program: int main() { int fd = open("/proc/sys/vm/overcommit_memory", O_RDWR); write(fd, "1", 1); write(fd, "2", 1); close(fd); } write(fd, "2", 1) will pass *ppos = 1 to proc_dointvec_minmax. proc_dointvec_minmax will return 0 without setting new_policy. t.data = &new_policy; ret = proc_dointvec_minmax(&t, write, buffer, lenp, ppos) -->do_proc_dointvec -->__do_proc_dointvec if (write) { if (proc_first_pos_non_zero_ignore(ppos, table)) goto out; sysctl_overcommit_memory = new_policy; so sysctl_overcommit_memory will be set to an uninitialized value. Check whether new_policy has been changed by proc_dointvec_minmax. Link: https://lkml.kernel.org/r/20210923020524.13289-1-chenjun102@huawei.com Fixes: `56f3547bfa` ("mm: adjust vm_committed_as_batch according to vm overcommit policy") Signed-off-by: Chen Jun <chenjun102@huawei.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Feng Tang <feng.tang@intel.com> Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Rui Xiang <rui.xiang@huawei.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2021-09-24 16:13:35 -07:00
Linus Torvalds	7661809d49	mm: don't allow oversized kvmalloc() calls 'kvmalloc()' is a convenience function for people who want to do a kmalloc() but fall back on vmalloc() if there aren't enough physically contiguous pages, or if the allocation is larger than what kmalloc() supports. However, let's make sure it doesn't get _too_ easy to do crazy things with it. In particular, don't allow big allocations that could be due to integer overflow or underflow. So make sure the allocation size fits in an 'int', to protect against trivial integer conversion issues. Acked-by: Willy Tarreau <w@1wt.eu> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2021-09-02 09:47:01 -07:00
Dave Chinner	de2860f463	mm: Add kvrealloc() During log recovery of an XFS filesystem with 64kB directory buffers, rebuilding a buffer split across two log records results in a memory allocation warning from krealloc like this: xfs filesystem being mounted at /mnt/scratch supports timestamps until 2038 (0x7fffffff) XFS (dm-0): Unmounting Filesystem XFS (dm-0): Mounting V5 Filesystem XFS (dm-0): Starting recovery (logdev: internal) ------------[ cut here ]------------ WARNING: CPU: 5 PID: 3435170 at mm/page_alloc.c:3539 get_page_from_freelist+0xdee/0xe40 ..... RIP: 0010:get_page_from_freelist+0xdee/0xe40 Call Trace: ? complete+0x3f/0x50 __alloc_pages+0x16f/0x300 alloc_pages+0x87/0x110 kmalloc_order+0x2c/0x90 kmalloc_order_trace+0x1d/0x90 __kmalloc_track_caller+0x215/0x270 ? xlog_recover_add_to_cont_trans+0x63/0x1f0 krealloc+0x54/0xb0 xlog_recover_add_to_cont_trans+0x63/0x1f0 xlog_recovery_process_trans+0xc1/0xd0 xlog_recover_process_ophdr+0x86/0x130 xlog_recover_process_data+0x9f/0x160 xlog_recover_process+0xa2/0x120 xlog_do_recovery_pass+0x40b/0x7d0 ? __irq_work_queue_local+0x4f/0x60 ? irq_work_queue+0x3a/0x50 xlog_do_log_recovery+0x70/0x150 xlog_do_recover+0x38/0x1d0 xlog_recover+0xd8/0x170 xfs_log_mount+0x181/0x300 xfs_mountfs+0x4a1/0x9b0 xfs_fs_fill_super+0x3c0/0x7b0 get_tree_bdev+0x171/0x270 ? suffix_kstrtoint.constprop.0+0xf0/0xf0 xfs_fs_get_tree+0x15/0x20 vfs_get_tree+0x24/0xc0 path_mount+0x2f5/0xaf0 __x64_sys_mount+0x108/0x140 do_syscall_64+0x3a/0x70 entry_SYSCALL_64_after_hwframe+0x44/0xae Essentially, we are taking a multi-order allocation from kmem_alloc() (which has an open coded no fail, no warn loop) and then reallocating it out to 64kB using krealloc(__GFP_NOFAIL) and that is then triggering the above warning. This is a regression caused by converting this code from an open coded no fail/no warn reallocation loop to using __GFP_NOFAIL. What we actually need here is kvrealloc(), so that if contiguous page allocation fails we fall back to vmalloc() and we don't get nasty warnings happening in XFS. Fixes: `771915c4f6` ("xfs: remove kmem_realloc()") Signed-off-by: Dave Chinner <dchinner@redhat.com> Acked-by: Mel Gorman <mgorman@techsingularity.net> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Darrick J. Wong <djwong@kernel.org>	2021-08-09 15:57:43 -07:00
Matthew Wilcox (Oracle)	79789db03f	mm: Make copy_huge_page() always available Rewrite copy_huge_page() and move it into mm/util.c so it's always available. Fixes an exposure of uninitialised memory on configurations with HUGETLB and UFFD enabled and MIGRATION disabled. Fixes: `8cc5fcbb5b` ("mm, hugetlb: fix racy resv_huge_pages underflow on UFFDIO_COPY") Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2021-07-12 11:30:56 -07:00
Linus Torvalds	28e92f9903	Merge branch 'core-rcu-2021.07.04' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu Pull RCU updates from Paul McKenney: - Bitmap parsing support for "all" as an alias for all bits - Documentation updates - Miscellaneous fixes, including some that overlap into mm and lockdep - kvfree_rcu() updates - mem_dump_obj() updates, with acks from one of the slab-allocator maintainers - RCU NOCB CPU updates, including limited deoffloading - SRCU updates - Tasks-RCU updates - Torture-test updates * 'core-rcu-2021.07.04' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (78 commits) tasks-rcu: Make show_rcu_tasks_gp_kthreads() be static inline rcu-tasks: Make ksoftirqd provide RCU Tasks quiescent states rcu: Add missing __releases() annotation rcu: Remove obsolete rcu_read_unlock() deadlock commentary rcu: Improve comments describing RCU read-side critical sections rcu: Create an unrcu_pointer() to remove __rcu from a pointer srcu: Early test SRCU polling start rcu: Fix various typos in comments rcu/nocb: Unify timers rcu/nocb: Prepare for fine-grained deferred wakeup rcu/nocb: Only cancel nocb timer if not polling rcu/nocb: Delete bypass_timer upon nocb_gp wakeup rcu/nocb: Cancel nocb_timer upon nocb_gp wakeup rcu/nocb: Allow de-offloading rdp leader rcu/nocb: Directly call __wake_nocb_gp() from bypass timer rcu: Don't penalize priority boosting when there is nothing to boost rcu: Point to documentation of ordering guarantees rcu: Make rcu_gp_cleanup() be noinline for tracing rcu: Restrict RCU_STRICT_GRACE_PERIOD to at most four CPUs rcu: Make show_rcu_gp_kthreads() dump rcu_node structures blocking GP ...	2021-07-04 12:58:33 -07:00
David Hildenbrand	8284045193	mm: introduce page_offline_(begin\|end\|freeze\|thaw) to synchronize setting PageOffline() A driver might set a page logically offline -- PageOffline() -- and turn the page inaccessible in the hypervisor; after that, access to page content can be fatal. One example is virtio-mem; while unplugged memory -- marked as PageOffline() can currently be read in the hypervisor, this will no longer be the case in the future; for example, when having a virtio-mem device backed by huge pages in the hypervisor. Some special PFN walkers -- i.e., /proc/kcore -- read content of random pages after checking PageOffline(); however, these PFN walkers can race with drivers that set PageOffline(). Let's introduce page_offline_(begin\|end\|freeze\|thaw) for synchronizing. page_offline_freeze()/page_offline_thaw() allows for a subsystem to synchronize with such drivers, achieving that a page cannot be set PageOffline() while frozen. page_offline_begin()/page_offline_end() is used by drivers that care about such races when setting a page PageOffline(). For simplicity, use a rwsem for now; neither drivers nor users are performance sensitive. Link: https://lkml.kernel.org/r/20210526093041.8800-5-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Aili Yao <yaoaili@kingsoft.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Alex Shi <alex.shi@linux.alibaba.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Jiri Bohac <jbohac@suse.cz> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Naoya Horiguchi <naoya.horiguchi@nec.com> Cc: Roman Gushchin <guro@fb.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Steven Price <steven.price@arm.com> Cc: Wei Liu <wei.liu@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2021-06-30 20:47:28 -07:00
Maninder Singh	e548eaa116	mm/slub: Add Support for free path information of an object This commit adds enables a stack dump for the last free of an object: slab kmalloc-64 start c8ab0140 data offset 64 pointer offset 0 size 64 allocated at meminfo_proc_show+0x40/0x4fc [ 20.192078] meminfo_proc_show+0x40/0x4fc [ 20.192263] seq_read_iter+0x18c/0x4c4 [ 20.192430] proc_reg_read_iter+0x84/0xac [ 20.192617] generic_file_splice_read+0xe8/0x17c [ 20.192816] splice_direct_to_actor+0xb8/0x290 [ 20.193008] do_splice_direct+0xa0/0xe0 [ 20.193185] do_sendfile+0x2d0/0x438 [ 20.193345] sys_sendfile64+0x12c/0x140 [ 20.193523] ret_fast_syscall+0x0/0x58 [ 20.193695] 0xbeeacde4 [ 20.193822] Free path: [ 20.193935] meminfo_proc_show+0x5c/0x4fc [ 20.194115] seq_read_iter+0x18c/0x4c4 [ 20.194285] proc_reg_read_iter+0x84/0xac [ 20.194475] generic_file_splice_read+0xe8/0x17c [ 20.194685] splice_direct_to_actor+0xb8/0x290 [ 20.194870] do_splice_direct+0xa0/0xe0 [ 20.195014] do_sendfile+0x2d0/0x438 [ 20.195174] sys_sendfile64+0x12c/0x140 [ 20.195336] ret_fast_syscall+0x0/0x58 [ 20.195491] 0xbeeacde4 Acked-by: Vlastimil Babka <vbabka@suse.cz> Co-developed-by: Vaneet Narang <v.narang@samsung.com> Signed-off-by: Vaneet Narang <v.narang@samsung.com> Signed-off-by: Maninder Singh <maninder1.s@samsung.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>	2021-05-10 16:01:41 -07:00
Bhaskar Chowdhury	31454980b8	mm/util.c: fix typo s/condtion/condition/ Link: https://lkml.kernel.org/r/20210317033439.3429411-1-unixbhaskar@gmail.com Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2021-05-05 11:27:25 -07:00
Joe Perches	2521781c1e	mm/util.c: reduce mem_dump_obj() object size Simplify the code by using a temporary and reduce the object size by using a single call to pr_cont(). Reverse a test and unindent a block too. $ size mm/util.o* (defconfig x86-64) text data bss dec hex filename 7419 372 40 7831 1e97 mm/util.o.new 7477 372 40 7889 1ed1 mm/util.o.old Link: https://lkml.kernel.org/r/a6e105886338f68afd35f7a13d73bcf06b0cc732.camel@perches.com Signed-off-by: Joe Perches <joe@perches.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2021-05-05 11:27:25 -07:00
Matthew Wilcox (Oracle)	842ca547f7	mm: move page_mapping_file to pagemap.h page_mapping_file() is only used by some architectures, and then it is usually only used in one place. Make it a static inline function so other architectures don't have to carry this dead code. Link: https://lkml.kernel.org/r/20210317123011.350118-1-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: David Hildenbrand <david@redhat.com> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2021-04-30 11:20:37 -07:00
Paul E. McKenney	0d3dd2c8ea	rcutorture: Add crude tests for mem_dump_obj() This commit adds a few crude tests for mem_dump_obj() to rcutorture runs. Just to prevent bitrot, you understand! Signed-off-by: Paul E. McKenney <paulmck@kernel.org>	2021-03-08 14:18:46 -08:00
Paul E. McKenney	5bb1bb353c	mm: Don't build mm_dump_obj() on CONFIG_PRINTK=n kernels The mem_dump_obj() functionality adds a few hundred bytes, which is a small price to pay. Except on kernels built with CONFIG_PRINTK=n, in which mem_dump_obj() messages will be suppressed. This commit therefore makes mem_dump_obj() be a static inline empty function on kernels built with CONFIG_PRINTK=n and excludes all of its support functions as well. This avoids kernel bloat on systems that cannot use mem_dump_obj(). Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: <linux-mm@kvack.org> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>	2021-03-08 14:18:46 -08:00
Paul E. McKenney	98f180837a	mm: Make mem_dump_obj() handle vmalloc() memory This commit adds vmalloc() support to mem_dump_obj(). Note that the vmalloc_dump_obj() function combines the checking and dumping, in contrast with the split between kmem_valid_obj() and kmem_dump_obj(). The reason for the difference is that the checking in the vmalloc() case involves acquiring a global lock, and redundant acquisitions of global locks should be avoided, even on not-so-fast paths. Note that this change causes on-stack variables to be reported as vmalloc() storage from kernel_clone() or similar, depending on the degree of inlining that your compiler does. This is likely more helpful than the earlier "non-paged (local) memory". Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: <linux-mm@kvack.org> Reported-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>	2021-01-22 15:24:04 -08:00
Paul E. McKenney	b70fa3b12f	mm: Make mem_dump_obj() handle NULL and zero-sized pointers This commit makes mem_dump_obj() call out NULL and zero-sized pointers specially instead of classifying them as non-paged memory. Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <linux-mm@kvack.org> Reported-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>	2021-01-22 15:23:57 -08:00
Paul E. McKenney	8e7f37f2aa	mm: Add mem_dump_obj() to print source of memory block There are kernel facilities such as per-CPU reference counts that give error messages in generic handlers or callbacks, whose messages are unenlightening. In the case of per-CPU reference-count underflow, this is not a problem when creating a new use of this facility because in that case the bug is almost certainly in the code implementing that new use. However, trouble arises when deploying across many systems, which might exercise corner cases that were not seen during development and testing. Here, it would be really nice to get some kind of hint as to which of several uses the underflow was caused by. This commit therefore exposes a mem_dump_obj() function that takes a pointer to memory (which must still be allocated if it has been dynamically allocated) and prints available information on where that memory came from. This pointer can reference the middle of the block as well as the beginning of the block, as needed by things like RCU callback functions and timer handlers that might not know where the beginning of the memory block is. These functions and handlers can use mem_dump_obj() to print out better hints as to where the problem might lie. The information printed can depend on kernel configuration. For example, the allocation return address can be printed only for slab and slub, and even then only when the necessary debug has been enabled. For slab, build with CONFIG_DEBUG_SLAB=y, and either use sizes with ample space to the next power of two or use the SLAB_STORE_USER when creating the kmem_cache structure. For slub, build with CONFIG_SLUB_DEBUG=y and boot with slub_debug=U, or pass SLAB_STORE_USER to kmem_cache_create() if more focused use is desired. Also for slub, use CONFIG_STACKTRACE to enable printing of the allocation-time stack trace. Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <linux-mm@kvack.org> Reported-by: Andrii Nakryiko <andrii@kernel.org> [ paulmck: Convert to printing and change names per Joonsoo Kim. ] [ paulmck: Move slab definition per Stephen Rothwell and kbuild test robot. ] [ paulmck: Handle CONFIG_MMU=n case where vmalloc() is kmalloc(). ] [ paulmck: Apply Vlastimil Babka feedback on slab.c kmem_provenance(). ] [ paulmck: Extract more info from !SLUB_DEBUG per Joonsoo Kim. ] [ paulmck: Explicitly check for small pointers per Naresh Kamboju. ] Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>	2021-01-22 15:16:01 -08:00
Christian König	295992fb81	mm: introduce vma_set_file function v5 Add the new vma_set_file() function to allow changing vma->vm_file with the necessary refcount dance. v2: add more users of this. v3: add missing EXPORT_SYMBOL, rebase on mmap cleanup, add comments why we drop the reference on two occasions. v4: make it clear that changing an anonymous vma is illegal. v5: move vma_set_file to mm/util.c Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v2) Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Acked-by: Andrew Morton <akpm@linux-foundation.org> Link: https://patchwork.freedesktop.org/patch/399360/	2020-11-19 10:36:36 +01:00
Bartosz Golaszewski	295a173023	mm/util.c: update the kerneldoc for kstrdup_const() Memory allocated with kstrdup_const() must not be passed to regular krealloc() as it is not aware of the possibility of the chunk residing in .rodata. Since there are no potential users of krealloc_const() at the moment, let's just update the doc to make it explicit. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20200817173927.23389-1-brgl@bgdev.pl Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-10-16 11:11:17 -07:00
Catalin Marinas	4d1a8a2dc0	arm64: mte: Tags-aware aware memcmp_pages() implementation When the Memory Tagging Extension is enabled, two pages are identical only if both their data and tags are identical. Make the generic memcmp_pages() a __weak function and add an arm64-specific implementation which returns non-zero if any of the two pages contain valid MTE tags (PG_mte_tagged set). There isn't much benefit in comparing the tags of two pages since these are normally used for heap allocations and likely to differ anyway. Co-developed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org>	2020-09-04 12:46:07 +01:00
Peter Collingbourne	45e55300f1	mm: remove unnecessary wrapper function do_mmap_pgoff() The current split between do_mmap() and do_mmap_pgoff() was introduced in commit `1fcfd8db7f` ("mm, mpx: add "vm_flags_t vm_flags" arg to do_mmap_pgoff()") to support MPX. The wrapper function do_mmap_pgoff() always passed 0 as the value of the vm_flags argument to do_mmap(). However, MPX support has subsequently been removed from the kernel and there were no more direct callers of do_mmap(); all calls were going via do_mmap_pgoff(). Simplify the code by removing do_mmap_pgoff() and changing all callers to directly call do_mmap(), which now no longer takes a vm_flags argument. Signed-off-by: Peter Collingbourne <pcc@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: David Hildenbrand <david@redhat.com> Link: http://lkml.kernel.org/r/20200727194109.1371462-1-pcc@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-08-07 11:33:27 -07:00
Feng Tang	56f3547bfa	mm: adjust vm_committed_as_batch according to vm overcommit policy When checking a performance change for will-it-scale scalability mmap test [1], we found very high lock contention for spinlock of percpu counter 'vm_committed_as': 94.14% 0.35% [kernel.kallsyms] [k] _raw_spin_lock_irqsave 48.21% _raw_spin_lock_irqsave;percpu_counter_add_batch;__vm_enough_memory;mmap_region;do_mmap; 45.91% _raw_spin_lock_irqsave;percpu_counter_add_batch;__do_munmap; Actually this heavy lock contention is not always necessary. The 'vm_committed_as' needs to be very precise when the strict OVERCOMMIT_NEVER policy is set, which requires a rather small batch number for the percpu counter. So keep 'batch' number unchanged for strict OVERCOMMIT_NEVER policy, and lift it to 64X for OVERCOMMIT_ALWAYS and OVERCOMMIT_GUESS policies. Also add a sysctl handler to adjust it when the policy is reconfigured. Benchmark with the same testcase in [1] shows 53% improvement on a 8C/16T desktop, and 2097%(20X) on a 4S/72C/144T server. We tested with test platforms in 0day (server, desktop and laptop), and 80%+ platforms shows improvements with that test. And whether it shows improvements depends on if the test mmap size is bigger than the batch number computed. And if the lift is 16X, 1/3 of the platforms will show improvements, though it should help the mmap/unmap usage generally, as Michal Hocko mentioned: : I believe that there are non-synthetic worklaods which would benefit from : a larger batch. E.g. large in memory databases which do large mmaps : during startups from multiple threads. [1] https://lore.kernel.org/lkml/20200305062138.GI5972@shao2-debian/ Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Qian Cai <cai@lca.pw> Cc: Kees Cook <keescook@chromium.org> Cc: Andi Kleen <andi.kleen@intel.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Christoph Lameter <cl@linux.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: kernel test robot <rong.a.chen@intel.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Tejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/r/1589611660-89854-4-git-send-email-feng.tang@intel.com Link: http://lkml.kernel.org/r/1592725000-73486-4-git-send-email-feng.tang@intel.com Link: http://lkml.kernel.org/r/1594389708-60781-5-git-send-email-feng.tang@intel.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-08-07 11:33:26 -07:00
Feng Tang	4e2ee51e82	mm/util.c: make vm_memory_committed() more accurate percpu_counter_sum_positive() will provide more accurate info. As with percpu_counter_read_positive(), in worst case the deviation could be 'batch * nr_cpus', which is totalram_pages/256 for now, and will be more when the batch gets enlarged. Its time cost is about 800 nanoseconds on a 2C/4T platform and 2~3 microseconds on a 2S/36C/72T Skylake server in normal case, and in worst case where vm_committed_as's spinlock is under severe contention, it costs 30~40 microseconds for the 2S/36C/72T Skylake sever, which should be fine for its only two users: /proc/meminfo and HyperV balloon driver's status trace per second. Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michal Hocko <mhocko@suse.com> # for /proc/meminfo Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Qian Cai <cai@lca.pw> Cc: Andi Kleen <andi.kleen@intel.com> Cc: Tim Chen <tim.c.chen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Christoph Lameter <cl@linux.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: kernel test robot <rong.a.chen@intel.com> Cc: Tejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/r/1592725000-73486-3-git-send-email-feng.tang@intel.com Link: http://lkml.kernel.org/r/1594389708-60781-3-git-send-email-feng.tang@intel.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-08-07 11:33:26 -07:00
Michel Lespinasse	c1e8d7c6a7	mmap locking API: convert mmap_sem comments Convert comments that reference mmap_sem to reference mmap_lock instead. [akpm@linux-foundation.org: fix up linux-next leftovers] [akpm@linux-foundation.org: s/lockaphore/lock/, per Vlastimil] [akpm@linux-foundation.org: more linux-next fixups, per Michel] Signed-off-by: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Davidlohr Bueso <dbueso@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Laurent Dufour <ldufour@linux.ibm.com> Cc: Liam Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ying Han <yinghan@google.com> Link: http://lkml.kernel.org/r/20200520052908.204642-13-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-06-09 09:39:14 -07:00
Michel Lespinasse	42fc541404	mmap locking API: add mmap_assert_locked() and mmap_assert_write_locked() Add new APIs to assert that mmap_sem is held. Using this instead of rwsem_is_locked and lockdep_assert_held[_write] makes the assertions more tolerant of future changes to the lock type. Signed-off-by: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Davidlohr Bueso <dbueso@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Laurent Dufour <ldufour@linux.ibm.com> Cc: Liam Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ying Han <yinghan@google.com> Link: http://lkml.kernel.org/r/20200520052908.204642-10-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-06-09 09:39:14 -07:00
Michel Lespinasse	d8ed45c5dc	mmap locking API: use coccinelle to convert mmap_sem rwsem call sites This change converts the existing mmap_sem rwsem calls to use the new mmap locking API instead. The change is generated using coccinelle with the following rule: // spatch --sp-file mmap_lock_api.cocci --in-place --include-headers --dir . @@ expression mm; @@ ( -init_rwsem +mmap_init_lock \| -down_write +mmap_write_lock \| -down_write_killable +mmap_write_lock_killable \| -down_write_trylock +mmap_write_trylock \| -up_write +mmap_write_unlock \| -downgrade_write +mmap_write_downgrade \| -down_read +mmap_read_lock \| -down_read_killable +mmap_read_lock_killable \| -down_read_trylock +mmap_read_trylock \| -up_read +mmap_read_unlock ) -(&mm->mmap_sem) +(mm) Signed-off-by: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Davidlohr Bueso <dbueso@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Liam Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ying Han <yinghan@google.com> Link: http://lkml.kernel.org/r/20200520052908.204642-5-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-06-09 09:39:14 -07:00
Waiman Long	d4eaa28378	mm: add kvfree_sensitive() for freeing sensitive data objects For kvmalloc'ed data object that contains sensitive information like cryptographic keys, we need to make sure that the buffer is always cleared before freeing it. Using memset() alone for buffer clearing may not provide certainty as the compiler may compile it away. To be sure, the special memzero_explicit() has to be used. This patch introduces a new kvfree_sensitive() for freeing those sensitive data objects allocated by kvmalloc(). The relevant places where kvfree_sensitive() can be used are modified to use it. Fixes: `4f0882491a` ("KEYS: Avoid false positive ENOMEM error on key read") Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Eric Biggers <ebiggers@google.com> Acked-by: David Howells <dhowells@redhat.com> Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Cc: James Morris <jmorris@namei.org> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: Joe Perches <joe@perches.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: David Rientjes <rientjes@google.com> Cc: Uladzislau Rezki <urezki@gmail.com> Link: http://lkml.kernel.org/r/20200407200318.11711-1-longman@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-06-04 19:06:22 -07:00
Feng Tang	c571686a92	mm/util.c: remove the VM_WARN_ONCE for vm_committed_as underflow check This check was added by commit `82f71ae4a2` ("mm: catch memory commitment underflow") in 2014 to have a safety check for issues which have been fixed. And there has been few report caught by it, as described in its commit log: : This shouldn't happen any more - the previous two patches fixed : the committed_as underflow issues. But it was really found by Qian Cai when he used the LTP memory stress suite to test a RFC patchset, which tries to improve scalability of per-cpu counter 'vm_committed_as', by chosing a bigger 'batch' number for loose overcommit policies (OVERCOMMIT_ALWAYS and OVERCOMMIT_GUESS), while keeping current number for OVERCOMMIT_NEVER. With that patchset, when system firstly uses a loose policy, the 'vm_committed_as' count could be a big negative value, as its big 'batch' number allows a big deviation, then when the policy is changed to OVERCOMMIT_NEVER, the 'batch' will be decreased to a much smaller value, thus hits this WARN check. To mitigate this, one proposed solution is to queue work on all online CPUs to do a local sync for 'vm_committed_as' when changing policy to OVERCOMMIT_NEVER, plus some global syncing to garante the case won't be hit. But this solution is costy and slow, given this check hasn't shown real trouble or benefit, simply drop it from one hot path of MM. And perf stats does show some tiny saving for removing it. Reported-by: Qian Cai <cai@lca.pw> Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Qian Cai <cai@lca.pw> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Andi Kleen <andi.kleen@intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Kees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/r/20200603094804.GB89848@shbuild999.sh.intel.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-06-04 19:06:20 -07:00
Linus Torvalds	cb8e59cc87	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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 ...	2020-06-03 16:27:18 -07:00
Christoph Hellwig	2b9059489c	mm: remove __vmalloc_node_flags_caller Just use __vmalloc_node instead which gets and extra argument. To be able to to use __vmalloc_node in all caller make it available outside of vmalloc and implement it in nommu.c. [akpm@linux-foundation.org: fix nommu build] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Gao Xiang <xiang@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Kelley <mikelley@microsoft.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Wei Liu <wei.liu@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Link: http://lkml.kernel.org/r/20200414131348.444715-25-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2020-06-02 10:59:11 -07:00
Christoph Hellwig	32927393dc	sysctl: pass kernel pointers to ->proc_handler Instead of having all the sysctl handlers deal with user pointers, which is rather hairy in terms of the BPF interaction, copy the input to and from userspace in common code. This also means that the strings are always NUL-terminated by the common code, making the API a little bit safer. As most handler just pass through the data to one of the common handlers a lot of the changes are mechnical. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>	2020-04-27 02:07:40 -04:00
Wei Yang	aba6dfb75f	mm/mmap.c: rb_parent is not necessary in __vma_link_list() Now we use rb_parent to get next, while this is not necessary. When prev is NULL, this means vma should be the first element in the list. Then next should be current first one (mm->mmap), no matter whether we have parent or not. After removing it, the code shows the beauty of symmetry. Link: http://lkml.kernel.org/r/20190813032656.16625-1-richardw.yang@linux.intel.com Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Acked-by: Andrew Morton <akpm@linux-foundation.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-12-01 06:29:19 -08:00
Wei Yang	1b9fc5b24f	mm/mmap.c: extract __vma_unlink_list() as counterpart for __vma_link_list() Just make the code a little easier to read. Link: http://lkml.kernel.org/r/20191006012636.31521-3-richardw.yang@linux.intel.com Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Oscar Salvador <osalvador@suse.de> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-12-01 06:29:19 -08:00
Alexandre Ghiti	e7142bf5d2	arm64, mm: make randomization selected by generic topdown mmap layout This commits selects ARCH_HAS_ELF_RANDOMIZE when an arch uses the generic topdown mmap layout functions so that this security feature is on by default. Note that this commit also removes the possibility for arm64 to have elf randomization and no MMU: without MMU, the security added by randomization is worth nothing. Link: http://lkml.kernel.org/r/20190730055113.23635-6-alex@ghiti.fr Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Kees Cook <keescook@chromium.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Cc: James Hogan <jhogan@kernel.org> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-09-24 15:54:11 -07:00
Alexandre Ghiti	67f3977f80	arm64, mm: move generic mmap layout functions to mm arm64 handles top-down mmap layout in a way that can be easily reused by other architectures, so make it available in mm. It then introduces a new config ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT that can be set by other architectures to benefit from those functions. Note that this new config depends on MMU being enabled, if selected without MMU support, a warning will be thrown. Link: http://lkml.kernel.org/r/20190730055113.23635-5-alex@ghiti.fr Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> Suggested-by: Christoph Hellwig <hch@infradead.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Kees Cook <keescook@chromium.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: James Hogan <jhogan@kernel.org> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-09-24 15:54:11 -07:00
Alexandre Ghiti	649775be63	mm, fs: move randomize_stack_top from fs to mm Patch series "Provide generic top-down mmap layout functions", v6. This series introduces generic functions to make top-down mmap layout easily accessible to architectures, in particular riscv which was the initial goal of this series. The generic implementation was taken from arm64 and used successively by arm, mips and finally riscv. Note that in addition the series fixes 2 issues: - stack randomization was taken into account even if not necessary. - [1] fixed an issue with mmap base which did not take into account randomization but did not report it to arm and mips, so by moving arm64 into a generic library, this problem is now fixed for both architectures. This work is an effort to factorize architecture functions to avoid code duplication and oversights as in [1]. [1]: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1429066.html This patch (of 14): This preparatory commit moves this function so that further introduction of generic topdown mmap layout is contained only in mm/util.c. Link: http://lkml.kernel.org/r/20190730055113.23635-2-alex@ghiti.fr Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> Acked-by: Kees Cook <keescook@chromium.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: James Hogan <jhogan@kernel.org> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-09-24 15:54:11 -07:00
Song Liu	010c164a5f	mm: move memcmp_pages() and pages_identical() Patch series "THP aware uprobe", v13. This patchset makes uprobe aware of THPs. Currently, when uprobe is attached to text on THP, the page is split by FOLL_SPLIT. As a result, uprobe eliminates the performance benefit of THP. This set makes uprobe THP-aware. Instead of FOLL_SPLIT, we introduces FOLL_SPLIT_PMD, which only split PMD for uprobe. After all uprobes within the THP are removed, the PTE-mapped pages are regrouped as huge PMD. This set (plus a few THP patches) is also available at https://github.com/liu-song-6/linux/tree/uprobe-thp This patch (of 6): Move memcmp_pages() to mm/util.c and pages_identical() to mm.h, so that we can use them in other files. Link: http://lkml.kernel.org/r/20190815164525.1848545-2-songliubraving@fb.com Signed-off-by: Song Liu <songliubraving@fb.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Matthew Wilcox <matthew.wilcox@oracle.com> Cc: William Kucharski <william.kucharski@oracle.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-09-24 15:54:11 -07:00
Matthew Wilcox (Oracle)	d8c6546b1a	mm: introduce compound_nr() Replace 1 << compound_order(page) with compound_nr(page). Minor improvements in readability. Link: http://lkml.kernel.org/r/20190721104612.19120-4-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-09-24 15:54:08 -07:00
Daniel Jordan	79eb597cba	mm: add account_locked_vm utility function locked_vm accounting is done roughly the same way in five places, so unify them in a helper. Include the helper's caller in the debug print to distinguish between callsites. Error codes stay the same, so user-visible behavior does too. The one exception is that the -EPERM case in tce_account_locked_vm is removed because Alexey has never seen it triggered. [daniel.m.jordan@oracle.com: v3] Link: http://lkml.kernel.org/r/20190529205019.20927-1-daniel.m.jordan@oracle.com [sfr@canb.auug.org.au: fix mm/util.c] Link: http://lkml.kernel.org/r/20190524175045.26897-1-daniel.m.jordan@oracle.com Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru> Acked-by: Alex Williamson <alex.williamson@redhat.com> Cc: Alan Tull <atull@kernel.org> Cc: Alex Williamson <alex.williamson@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Christoph Lameter <cl@linux.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Moritz Fischer <mdf@kernel.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Steve Sistare <steven.sistare@oracle.com> Cc: Wu Hao <hao.wu@intel.com> Cc: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-07-16 19:23:25 -07:00
Christoph Hellwig	050a9adc64	mm: consolidate the get_user_pages* implementations Always build mm/gup.c so that we don't have to provide separate nommu stubs. Also merge the get_user_pages_fast and __get_user_pages_fast stubs when HAVE_FAST_GUP into the main implementations, which will never call the fast path if HAVE_FAST_GUP is not set. This also ensures the new put_user_pages* helpers are available for nommu, as those are currently missing, which would create a problem as soon as we actually grew users for it. Link: http://lkml.kernel.org/r/20190625143715.1689-13-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Miller <davem@davemloft.net> Cc: James Hogan <jhogan@kernel.org> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rich Felker <dalias@libc.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-07-12 11:05:45 -07:00
Michal Koutný	bc81426f5b	prctl_set_mm: downgrade mmap_sem to read lock The commit `a3b609ef9f` ("proc read mm's {arg,env}_{start,end} with mmap semaphore taken.") added synchronization of reading argument/environment boundaries under mmap_sem. Later commit `88aa7cc688` ("mm: introduce arg_lock to protect arg_start\|end and env_start\|end in mm_struct") avoided the coarse use of mmap_sem in similar situations. But there still remained two places that (mis)use mmap_sem. get_cmdline should also use arg_lock instead of mmap_sem when it reads the boundaries. The second place that should use arg_lock is in prctl_set_mm. By protecting the boundaries fields with the arg_lock, we can downgrade mmap_sem to reader lock (analogous to what we already do in prctl_set_mm_map). [akpm@linux-foundation.org: coding style fixes] Link: http://lkml.kernel.org/r/20190502125203.24014-3-mkoutny@suse.com Fixes: `88aa7cc688` ("mm: introduce arg_lock to protect arg_start\|end and env_start\|end in mm_struct") Signed-off-by: Michal Koutný <mkoutny@suse.com> Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com> Co-developed-by: Laurent Dufour <ldufour@linux.ibm.com> Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Yang Shi <yang.shi@linux.alibaba.com> Cc: Mateusz Guzik <mguzik@redhat.com> Cc: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-06-01 15:51:31 -07:00
Thomas Gleixner	457c899653	treewide: Add SPDX license identifier for missed files Add SPDX license identifiers to all files which: - Have no license information of any form - Have EXPORT_.*_SYMBOL_GPL inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2019-05-21 10:50:45 +02:00
Johannes Weiner	8c7829b04c	mm: fix false-positive OVERCOMMIT_GUESS failures With the default overcommit==guess we occasionally run into mmap rejections despite plenty of memory that would get dropped under pressure but just isn't accounted reclaimable. One example of this is dying cgroups pinned by some page cache. A previous case was auxiliary path name memory associated with dentries; we have since annotated those allocations to avoid overcommit failures (see `d79f7aa496` ("mm: treat indirectly reclaimable memory as free in overcommit logic")). But trying to classify all allocated memory reliably as reclaimable and unreclaimable is a bit of a fool's errand. There could be a myriad of dependencies that constantly change with kernel versions. It becomes even more questionable of an effort when considering how this estimate of available memory is used: it's not compared to the system-wide allocated virtual memory in any way. It's not even compared to the allocating process's address space. It's compared to the single allocation request at hand! So we have an elaborate left-hand side of the equation that tries to assess the exact breathing room the system has available down to a page - and then compare it to an isolated allocation request with no additional context. We could fail an allocation of N bytes, but for two allocations of N/2 bytes we'd do this elaborate dance twice in a row and then still let N bytes of virtual memory through. This doesn't make a whole lot of sense. Let's take a step back and look at the actual goal of the heuristic. From the documentation: Heuristic overcommit handling. Obvious overcommits of address space are refused. Used for a typical system. It ensures a seriously wild allocation fails while allowing overcommit to reduce swap usage. root is allowed to allocate slightly more memory in this mode. This is the default. If all we want to do is catch clearly bogus allocation requests irrespective of the general virtual memory situation, the physical memory counter-part doesn't need to be that complicated, either. When in GUESS mode, catch wild allocations by comparing their request size to total amount of ram and swap in the system. Link: http://lkml.kernel.org/r/20190412191418.26333-1-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Roman Gushchin <guro@fb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-05-14 09:47:50 -07:00
Ira Weiny	73b0140bf0	mm/gup: change GUP fast to use flags rather than a write 'bool' To facilitate additional options to get_user_pages_fast() change the singular write parameter to be gup_flags. This patch does not change any functionality. New functionality will follow in subsequent patches. Some of the get_user_pages_fast() call sites were unchanged because they already passed FOLL_WRITE or 0 for the write parameter. NOTE: It was suggested to change the ordering of the get_user_pages_fast() arguments to ensure that callers were converted. This breaks the current GUP call site convention of having the returned pages be the final parameter. So the suggestion was rejected. Link: http://lkml.kernel.org/r/20190328084422.29911-4-ira.weiny@intel.com Link: http://lkml.kernel.org/r/20190317183438.2057-4-ira.weiny@intel.com Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Mike Marshall <hubcap@omnibond.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Hogan <jhogan@kernel.org> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: John Hubbard <jhubbard@nvidia.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rich Felker <dalias@libc.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-05-14 09:47:46 -07:00
Andrew Morton	e91455217d	mm/util.c: fix strndup_user() comment The kerneldoc misdescribes strndup_user()'s return value. Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Timur Tabi <timur@freescale.com> Cc: Mihai Caraman <mihai.caraman@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-04-05 16:02:31 -10:00

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