1b59618ce4
https://source.android.com/docs/security/bulletin/2023-09-01 * tag 'ASB-2023-09-05_4.19-stable' of https://android.googlesource.com/kernel/common: Linux 4.19.294 Revert "ARM: ep93xx: fix missing-prototype warnings" Revert "MIPS: Alchemy: fix dbdma2" Linux 4.19.293 dma-buf/sw_sync: Avoid recursive lock during fence signal clk: Fix undefined reference to `clk_rate_exclusive_{get,put}' scsi: core: raid_class: Remove raid_component_add() scsi: snic: Fix double free in snic_tgt_create() irqchip/mips-gic: Don't touch vl_map if a local interrupt is not routable rtnetlink: Reject negative ifindexes in RTM_NEWLINK netfilter: nf_queue: fix socket leak sched/rt: pick_next_rt_entity(): check list_entry mmc: block: Fix in_flight[issue_type] value error x86/fpu: Set X86_FEATURE_OSXSAVE feature after enabling OSXSAVE in CR4 PCI: acpiphp: Use pci_assign_unassigned_bridge_resources() only for non-root bus media: vcodec: Fix potential array out-of-bounds in encoder queue_setup lib/clz_ctz.c: Fix __clzdi2() and __ctzdi2() for 32-bit kernels batman-adv: Fix batadv_v_ogm_aggr_send memory leak batman-adv: Fix TT global entry leak when client roamed back batman-adv: Do not get eth header before batadv_check_management_packet batman-adv: Don't increase MTU when set by user batman-adv: Trigger events for auto adjusted MTU nfsd: Fix race to FREE_STATEID and cl_revoked ibmveth: Use dcbf rather than dcbfl ipvs: fix racy memcpy in proc_do_sync_threshold ipvs: Improve robustness to the ipvs sysctl bonding: fix macvlan over alb bond support net: remove bond_slave_has_mac_rcu() net/sched: fix a qdisc modification with ambiguous command request igb: Avoid starting unnecessary workqueues dccp: annotate data-races in dccp_poll() sock: annotate data-races around prot->memory_pressure tracing: Fix memleak due to race between current_tracer and trace drm/amd/display: check TG is non-null before checking if enabled drm/amd/display: do not wait for mpc idle if tg is disabled regmap: Account for register length in SMBus I/O limits dm integrity: reduce vmalloc space footprint on 32-bit architectures dm integrity: increase RECALC_SECTORS to improve recalculate speed powerpc: Fail build if using recordmcount with binutils v2.37 powerpc: remove leftover code of old GCC version checks powerpc/32: add stack protector support fbdev: fix potential OOB read in fast_imageblit() fbdev: Fix sys_imageblit() for arbitrary image widths fbdev: Improve performance of sys_imageblit() tty: serial: fsl_lpuart: add earlycon for imx8ulp platform Revert "tty: serial: fsl_lpuart: drop earlycon entry for i.MX8QXP" MIPS: cpu-features: Use boot_cpu_type for CPU type based features MIPS: cpu-features: Enable octeon_cache by cpu_type fs: dlm: fix mismatch of plock results from userspace fs: dlm: use dlm_plock_info for do_unlock_close fs: dlm: change plock interrupted message to debug again fs: dlm: add pid to debug log dlm: replace usage of found with dedicated list iterator variable dlm: improve plock logging if interrupted PCI: acpiphp: Reassign resources on bridge if necessary net: phy: broadcom: stub c45 read/write for 54810 net: xfrm: Amend XFRMA_SEC_CTX nla_policy structure net: fix the RTO timer retransmitting skb every 1ms if linear option is enabled virtio-net: set queues after driver_ok af_unix: Fix null-ptr-deref in unix_stream_sendpage(). netfilter: set default timeout to 3 secs for sctp shutdown send and recv state test_firmware: prevent race conditions by a correct implementation of locking mmc: wbsd: fix double mmc_free_host() in wbsd_init() cifs: Release folio lock on fscache read hit. ALSA: usb-audio: Add support for Mythware XA001AU capture and playback interfaces. serial: 8250: Fix oops for port->pm on uart_change_pm() ASoC: meson: axg-tdm-formatter: fix channel slot allocation ASoC: rt5665: add missed regulator_bulk_disable net: do not allow gso_size to be set to GSO_BY_FRAGS sock: Fix misuse of sk_under_memory_pressure() i40e: fix misleading debug logs team: Fix incorrect deletion of ETH_P_8021AD protocol vid from slaves netfilter: nft_dynset: disallow object maps selftests: mirror_gre_changes: Tighten up the TTL test match xfrm: add NULL check in xfrm_update_ae_params ip_vti: fix potential slab-use-after-free in decode_session6 ip6_vti: fix slab-use-after-free in decode_session6 xfrm: fix slab-use-after-free in decode_session6 xfrm: interface: rename xfrm_interface.c to xfrm_interface_core.c net: af_key: fix sadb_x_filter validation net: xfrm: Fix xfrm_address_filter OOB read btrfs: fix BUG_ON condition in btrfs_cancel_balance powerpc/rtas_flash: allow user copy to flash block cache objects fbdev: mmp: fix value check in mmphw_probe() virtio-mmio: don't break lifecycle of vm_dev virtio-mmio: Use to_virtio_mmio_device() to simply code virtio-mmio: convert to devm_platform_ioremap_resource nfsd: Remove incorrect check in nfsd4_validate_stateid nfsd4: kill warnings on testing stateids with mismatched clientids block: fix signed int overflow in Amiga partition support mmc: sunxi: fix deferred probing mmc: bcm2835: fix deferred probing mmc: Remove dev_err() usage after platform_get_irq() mmc: tmio: move tmio_mmc_set_clock() to platform hook mmc: tmio: replace tmio_mmc_clk_stop() calls with tmio_mmc_set_clock() mmc: meson-gx: remove redundant mmc_request_done() call from irq context mmc: meson-gx: remove useless lock USB: dwc3: qcom: fix NULL-deref on suspend usb: dwc3: qcom: Add helper functions to enable,disable wake irqs irqchip/mips-gic: Use raw spinlock for gic_lock irqchip/mips-gic: Get rid of the reliance on irq_cpu_online() x86/topology: Fix erroneous smp_num_siblings on Intel Hybrid platforms powerpc/64s/radix: Fix soft dirty tracking powerpc: Move page table dump files in a dedicated subdirectory powerpc/mm: dump block address translation on book3s/32 powerpc/mm: dump segment registers on book3s/32 powerpc/mm: Move pgtable_t into platform headers powerpc/mm: move platform specific mmu-xxx.h in platform directories iio: addac: stx104: Fix race condition when converting analog-to-digital iio: addac: stx104: Fix race condition for stx104_write_raw() iio: adc: stx104: Implement and utilize register structures iio: adc: stx104: Utilize iomap interface iio: add addac subdirectory IMA: allow/fix UML builds drm/amdgpu: Fix potential fence use-after-free v2 Bluetooth: L2CAP: Fix use-after-free pcmcia: rsrc_nonstatic: Fix memory leak in nonstatic_release_resource_db() gfs2: Fix possible data races in gfs2_show_options() media: platform: mediatek: vpu: fix NULL ptr dereference media: v4l2-mem2mem: add lock to protect parameter num_rdy FS: JFS: Check for read-only mounted filesystem in txBegin FS: JFS: Fix null-ptr-deref Read in txBegin MIPS: dec: prom: Address -Warray-bounds warning fs: jfs: Fix UBSAN: array-index-out-of-bounds in dbAllocDmapLev udf: Fix uninitialized array access for some pathnames HID: add quirk for 03f0:464a HP Elite Presenter Mouse quota: fix warning in dqgrab() quota: Properly disable quotas when add_dquot_ref() fails ALSA: emu10k1: roll up loops in DSP setup code for Audigy drm/radeon: Fix integer overflow in radeon_cs_parser_init selftests: forwarding: tc_flower: Relax success criterion lib/mpi: Eliminate unused umul_ppmm definitions for MIPS Revert "posix-timers: Ensure timer ID search-loop limit is valid" UPSTREAM: media: usb: siano: Fix warning due to null work_func_t function pointer UPSTREAM: Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_ready_cb UPSTREAM: net/sched: cls_route: No longer copy tcf_result on update to avoid use-after-free UPSTREAM: net/sched: cls_u32: No longer copy tcf_result on update to avoid use-after-free Linux 4.19.292 sch_netem: fix issues in netem_change() vs get_dist_table() alpha: remove __init annotation from exported page_is_ram() scsi: core: Fix possible memory leak if device_add() fails scsi: snic: Fix possible memory leak if device_add() fails scsi: 53c700: Check that command slot is not NULL scsi: storvsc: Fix handling of virtual Fibre Channel timeouts scsi: core: Fix legacy /proc parsing buffer overflow netfilter: nf_tables: report use refcount overflow netfilter: nf_tables: bogus EBUSY when deleting flowtable after flush btrfs: don't stop integrity writeback too early ibmvnic: Handle DMA unmapping of login buffs in release functions wifi: cfg80211: fix sband iftype data lookup for AP_VLAN IB/hfi1: Fix possible panic during hotplug remove drivers: net: prevent tun_build_skb() to exceed the packet size limit dccp: fix data-race around dp->dccps_mss_cache bonding: Fix incorrect deletion of ETH_P_8021AD protocol vid from slaves net/packet: annotate data-races around tp->status mISDN: Update parameter type of dsp_cmx_send() drm/nouveau/disp: Revert a NULL check inside nouveau_connector_get_modes x86: Move gds_ucode_mitigated() declaration to header x86/mm: Fix VDSO and VVAR placement on 5-level paging machines x86/cpu/amd: Enable Zenbleed fix for AMD Custom APU 0405 usb: dwc3: Properly handle processing of pending events usb-storage: alauda: Fix uninit-value in alauda_check_media() binder: fix memory leak in binder_init() iio: cros_ec: Fix the allocation size for cros_ec_command nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput radix tree test suite: fix incorrect allocation size for pthreads drm/nouveau/gr: enable memory loads on helper invocation on all channels dmaengine: pl330: Return DMA_PAUSED when transaction is paused ipv6: adjust ndisc_is_useropt() to also return true for PIO mmc: moxart: read scr register without changing byte order sparc: fix up arch_cpu_finalize_init() build breakage. UPSTREAM: net/sched: cls_fw: Fix improper refcount update leads to use-after-free Linux 4.19.291 drm/edid: fix objtool warning in drm_cvt_modes() arm64: dts: stratix10: fix incorrect I2C property for SCL signal drivers core: Use sysfs_emit and sysfs_emit_at for show(device *...) functions ARM: dts: nxp/imx6sll: fix wrong property name in usbphy node ARM: dts: imx6sll: fixup of operating points ARM: dts: imx: add usb alias ARM: dts: imx6sll: Make ssi node name same as other platforms PM: sleep: wakeirq: fix wake irq arming PM / wakeirq: support enabling wake-up irq after runtime_suspend called powerpc/mm/altmap: Fix altmap boundary check mtd: rawnand: omap_elm: Fix incorrect type in assignment test_firmware: return ENOMEM instead of ENOSPC on failed memory allocation test_firmware: fix a memory leak with reqs buffer ext2: Drop fragment support net: usbnet: Fix WARNING in usbnet_start_xmit/usb_submit_urb Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_ready_cb fs/sysv: Null check to prevent null-ptr-deref bug USB: zaurus: Add ID for A-300/B-500/C-700 libceph: fix potential hang in ceph_osdc_notify() scsi: zfcp: Defer fc_rport blocking until after ADISC response tcp_metrics: fix data-race in tcpm_suck_dst() vs fastopen tcp_metrics: annotate data-races around tm->tcpm_net tcp_metrics: annotate data-races around tm->tcpm_vals[] tcp_metrics: annotate data-races around tm->tcpm_lock tcp_metrics: annotate data-races around tm->tcpm_stamp tcp_metrics: fix addr_same() helper ip6mr: Fix skb_under_panic in ip6mr_cache_report() net/sched: cls_route: No longer copy tcf_result on update to avoid use-after-free net/sched: cls_u32: No longer copy tcf_result on update to avoid use-after-free net: add missing data-race annotation for sk_ll_usec net: add missing data-race annotations around sk->sk_peek_off net: sched: cls_u32: Fix match key mis-addressing perf test uprobe_from_different_cu: Skip if there is no gcc net/mlx5e: fix return value check in mlx5e_ipsec_remove_trailer() KVM: s390: fix sthyi error handling word-at-a-time: use the same return type for has_zero regardless of endianness loop: Select I/O scheduler 'none' from inside add_disk() perf: Fix function pointer case net/sched: cls_u32: Fix reference counter leak leading to overflow ASoC: cs42l51: fix driver to properly autoload with automatic module loading net/sched: sch_qfq: account for stab overhead in qfq_enqueue net/sched: cls_fw: Fix improper refcount update leads to use-after-free drm/client: Fix memory leak in drm_client_target_cloned dm cache policy smq: ensure IO doesn't prevent cleaner policy progress ASoC: wm8904: Fill the cache for WM8904_ADC_TEST_0 register s390/dasd: fix hanging device after quiesce/resume virtio-net: fix race between set queues and probe serial: 8250_dw: Preserve original value of DLF register serial: 8250_dw: split Synopsys DesignWare 8250 common functions irq-bcm6345-l1: Do not assume a fixed block to cpu mapping tpm_tis: Explicitly check for error code btrfs: check for commit error at btrfs_attach_transaction_barrier() hwmon: (nct7802) Fix for temp6 (PECI1) processed even if PECI1 disabled staging: ks7010: potential buffer overflow in ks_wlan_set_encode_ext() Documentation: security-bugs.rst: clarify CVE handling Documentation: security-bugs.rst: update preferences when dealing with the linux-distros group usb: xhci-mtk: set the dma max_seg_size USB: quirks: add quirk for Focusrite Scarlett usb: ohci-at91: Fix the unhandle interrupt when resume usb: dwc3: don't reset device side if dwc3 was configured as host-only usb: dwc3: pci: skip BYT GPIO lookup table for hardwired phy Revert "usb: dwc3: core: Enable AutoRetry feature in the controller" can: gs_usb: gs_can_close(): add missing set of CAN state to CAN_STATE_STOPPED USB: serial: simple: sort driver entries USB: serial: simple: add Kaufmann RKS+CAN VCP USB: serial: option: add Quectel EC200A module support USB: serial: option: support Quectel EM060K_128 tracing: Fix warning in trace_buffered_event_disable() ring-buffer: Fix wrong stat of cpu_buffer->read ata: pata_ns87415: mark ns87560_tf_read static dm raid: fix missing reconfig_mutex unlock in raid_ctr() error paths block: Fix a source code comment in include/uapi/linux/blkzoned.h ASoC: fsl_spdif: Silence output on stop drm/msm: Fix IS_ERR_OR_NULL() vs NULL check in a5xx_submit_in_rb() RDMA/mlx4: Make check for invalid flags stricter benet: fix return value check in be_lancer_xmit_workarounds() net/sched: mqprio: Add length check for TCA_MQPRIO_{MAX/MIN}_RATE64 net/sched: mqprio: add extack to mqprio_parse_nlattr() net/sched: mqprio: refactor nlattr parsing to a separate function platform/x86: msi-laptop: Fix rfkill out-of-sync on MSI Wind U100 team: reset team's flags when down link is P2P device bonding: reset bond's flags when down link is P2P device tcp: Reduce chance of collisions in inet6_hashfn(). ipv6 addrconf: fix bug where deleting a mngtmpaddr can create a new temporary address ethernet: atheros: fix return value check in atl1e_tso_csum() phy: hisilicon: Fix an out of bounds check in hisi_inno_phy_probe() i40e: Fix an NULL vs IS_ERR() bug for debugfs_create_dir() ext4: fix to check return value of freeze_bdev() in ext4_shutdown() scsi: qla2xxx: Array index may go out of bound scsi: qla2xxx: Fix inconsistent format argument type in qla_os.c ftrace: Fix possible warning on checking all pages used in ftrace_process_locs() ftrace: Store the order of pages allocated in ftrace_page ftrace: Check if pages were allocated before calling free_pages() ftrace: Add information on number of page groups allocated fs: dlm: interrupt posix locks only when process is killed dlm: rearrange async condition return dlm: cleanup plock_op vs plock_xop PCI/ASPM: Avoid link retraining race PCI/ASPM: Factor out pcie_wait_for_retrain() PCI/ASPM: Return 0 or -ETIMEDOUT from pcie_retrain_link() PCI: Rework pcie_retrain_link() wait loop ext4: Fix reusing stale buffer heads from last failed mounting ext4: rename journal_dev to s_journal_dev inside ext4_sb_info btrfs: fix extent buffer leak after tree mod log failure at split_node() bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent bcache: remove 'int n' from parameter list of bch_bucket_alloc_set() bcache: use MAX_CACHES_PER_SET instead of magic number 8 in __bch_bucket_alloc_set gpio: tps68470: Make tps68470_gpio_output() always set the initial value tracing/histograms: Return an error if we fail to add histogram to hist_vars list tcp: annotate data-races around fastopenq.max_qlen tcp: annotate data-races around tp->notsent_lowat tcp: annotate data-races around rskq_defer_accept tcp: annotate data-races around tp->linger2 net: Replace the limit of TCP_LINGER2 with TCP_FIN_TIMEOUT_MAX netfilter: nf_tables: can't schedule in nft_chain_validate netfilter: nf_tables: fix spurious set element insertion failure llc: Don't drop packet from non-root netns. fbdev: au1200fb: Fix missing IRQ check in au1200fb_drv_probe Revert "tcp: avoid the lookup process failing to get sk in ehash table" net:ipv6: check return value of pskb_trim() net: ethernet: ti: cpsw_ale: Fix cpsw_ale_get_field()/cpsw_ale_set_field() pinctrl: amd: Use amd_pinconf_set() for all config options fbdev: imxfb: warn about invalid left/right margin spi: bcm63xx: fix max prepend length igb: Fix igb_down hung on surprise removal wifi: iwlwifi: mvm: avoid baid size integer overflow wifi: wext-core: Fix -Wstringop-overflow warning in ioctl_standard_iw_point() bpf: Address KCSAN report on bpf_lru_list sched/fair: Don't balance task to its current running CPU posix-timers: Ensure timer ID search-loop limit is valid md/raid10: prevent soft lockup while flush writes md: fix data corruption for raid456 when reshape restart while grow up nbd: Add the maximum limit of allocated index in nbd_dev_add debugobjects: Recheck debug_objects_enabled before reporting ext4: correct inline offset when handling xattrs in inode body can: bcm: Fix UAF in bcm_proc_show() fuse: revalidate: don't invalidate if interrupted perf probe: Add test for regression introduced by switch to die_get_decl_file() tracing/histograms: Add histograms to hist_vars if they have referenced variables drm/atomic: Fix potential use-after-free in nonblocking commits scsi: qla2xxx: Pointer may be dereferenced scsi: qla2xxx: Check valid rport returned by fc_bsg_to_rport() scsi: qla2xxx: Fix potential NULL pointer dereference scsi: qla2xxx: Wait for io return on terminate rport xtensa: ISS: fix call to split_if_spec ring-buffer: Fix deadloop issue on reading trace_pipe tty: serial: samsung_tty: Fix a memory leak in s3c24xx_serial_getclk() when iterating clk tty: serial: samsung_tty: Fix a memory leak in s3c24xx_serial_getclk() in case of error Revert "8250: add support for ASIX devices with a FIFO bug" meson saradc: fix clock divider mask length ceph: don't let check_caps skip sending responses for revoke msgs hwrng: imx-rngc - fix the timeout for init and self check serial: atmel: don't enable IRQs prematurely fs: dlm: return positive pid value for F_GETLK md/raid0: add discard support for the 'original' layout misc: pci_endpoint_test: Re-init completion for every test misc: pci_endpoint_test: Free IRQs before removing the device PCI: rockchip: Use u32 variable to access 32-bit registers PCI: rockchip: Fix legacy IRQ generation for RK3399 PCIe endpoint core PCI: rockchip: Add poll and timeout to wait for PHY PLLs to be locked PCI: rockchip: Write PCI Device ID to correct register PCI: rockchip: Assert PCI Configuration Enable bit after probe PCI: qcom: Disable write access to read only registers for IP v2.3.3 PCI: Add function 1 DMA alias quirk for Marvell 88SE9235 PCI/PM: Avoid putting EloPOS E2/S2/H2 PCIe Ports in D3cold jfs: jfs_dmap: Validate db_l2nbperpage while mounting ext4: only update i_reserved_data_blocks on successful block allocation ext4: fix wrong unit use in ext4_mb_clear_bb perf intel-pt: Fix CYC timestamps after standalone CBR SUNRPC: Fix UAF in svc_tcp_listen_data_ready() net: bcmgenet: Ensure MDIO unregistration has clocks enabled tpm: tpm_vtpm_proxy: fix a race condition in /dev/vtpmx creation pinctrl: amd: Only use special debounce behavior for GPIO 0 pinctrl: amd: Detect internal GPIO0 debounce handling pinctrl: amd: Fix mistake in handling clearing pins at startup net/sched: make psched_mtu() RTNL-less safe wifi: airo: avoid uninitialized warning in airo_get_rate() ipv6/addrconf: fix a potential refcount underflow for idev NTB: ntb_tool: Add check for devm_kcalloc NTB: ntb_transport: fix possible memory leak while device_register() fails ntb: intel: Fix error handling in intel_ntb_pci_driver_init() NTB: amd: Fix error handling in amd_ntb_pci_driver_init() ntb: idt: Fix error handling in idt_pci_driver_init() udp6: fix udp6_ehashfn() typo icmp6: Fix null-ptr-deref of ip6_null_entry->rt6i_idev in icmp6_dev(). vrf: Increment Icmp6InMsgs on the original netdev net: mvneta: fix txq_map in case of txq_number==1 workqueue: clean up WORK_* constant types, clarify masking net: lan743x: Don't sleep in atomic context netfilter: nf_tables: prevent OOB access in nft_byteorder_eval netfilter: conntrack: Avoid nf_ct_helper_hash uses after free netfilter: nf_tables: fix scheduling-while-atomic splat netfilter: nf_tables: unbind non-anonymous set if rule construction fails netfilter: nf_tables: reject unbound anonymous set before commit phase netfilter: nf_tables: add NFT_TRANS_PREPARE_ERROR to deal with bound set/chain netfilter: nf_tables: incorrect error path handling with NFT_MSG_NEWRULE netfilter: nf_tables: use net_generic infra for transaction data netfilter: add helper function to set up the nfnetlink header and use it netfilter: nftables: add helper function to set the base sequence number netfilter: nf_tables: add rescheduling points during loop detection walks netfilter: nf_tables: fix nat hook table deletion spi: spi-fsl-spi: allow changing bits_per_word while CS is still active spi: spi-fsl-spi: relax message sanity checking a little spi: spi-fsl-spi: remove always-true conditional in fsl_spi_do_one_msg ARM: orion5x: fix d2net gpio initialization btrfs: fix race when deleting quota root from the dirty cow roots list jffs2: reduce stack usage in jffs2_build_xattr_subsystem() integrity: Fix possible multiple allocation in integrity_inode_get() bcache: Remove unnecessary NULL point check in node allocations mmc: core: disable TRIM on Micron MTFC4GACAJCN-1M mmc: core: disable TRIM on Kingston EMMC04G-M627 NFSD: add encoding of op_recall flag for write delegation ALSA: jack: Fix mutex call in snd_jack_report() i2c: xiic: Don't try to handle more interrupt events after error i2c: xiic: Defer xiic_wakeup() and __xiic_start_xfer() in xiic_process() sh: dma: Fix DMA channel offset calculation net/sched: act_pedit: Add size check for TCA_PEDIT_PARMS_EX tcp: annotate data races in __tcp_oow_rate_limited() net: bridge: keep ports without IFF_UNICAST_FLT in BR_PROMISC mode powerpc: allow PPC_EARLY_DEBUG_CPM only when SERIAL_CPM=y f2fs: fix error path handling in truncate_dnode() mailbox: ti-msgmgr: Fill non-message tx data fields with 0x0 spi: bcm-qspi: return error if neither hif_mspi nor mspi is available Add MODULE_FIRMWARE() for FIRMWARE_TG357766. sctp: fix potential deadlock on &net->sctp.addr_wq_lock rtc: st-lpc: Release some resources in st_rtc_probe() in case of error mfd: stmpe: Only disable the regulators if they are enabled mfd: intel-lpss: Add missing check for platform_get_resource KVM: s390: fix KVM_S390_GET_CMMA_BITS for GFNs in memslot holes mfd: rt5033: Drop rt5033-battery sub-device usb: phy: phy-tahvo: fix memory leak in tahvo_usb_probe() extcon: Fix kernel doc of property capability fields to avoid warnings extcon: Fix kernel doc of property fields to avoid warnings media: usb: siano: Fix warning due to null work_func_t function pointer media: videodev2.h: Fix struct v4l2_input tuner index comment media: usb: Check az6007_read() return value sh: j2: Use ioremap() to translate device tree address into kernel memory w1: fix loop in w1_fini() block: change all __u32 annotations to __be32 in affs_hardblocks.h USB: serial: option: add LARA-R6 01B PIDs ARC: define ASM_NL and __ALIGN(_STR) outside #ifdef __ASSEMBLY__ guard ARCv2: entry: rewrite to enable use of double load/stores LDD/STD ARCv2: entry: avoid a branch ARCv2: entry: push out the Z flag unclobber from common EXCEPTION_PROLOGUE ARCv2: entry: comments about hardware auto-save on taken interrupts modpost: fix section mismatch message for R_ARM_{PC24,CALL,JUMP24} modpost: fix section mismatch message for R_ARM_ABS32 crypto: nx - fix build warnings when DEBUG_FS is not enabled hwrng: virtio - Fix race on data_avail and actual data hwrng: virtio - always add a pending request hwrng: virtio - don't waste entropy hwrng: virtio - don't wait on cleanup hwrng: virtio - add an internal buffer pinctrl: at91-pio4: check return value of devm_kasprintf() perf dwarf-aux: Fix off-by-one in die_get_varname() pinctrl: cherryview: Return correct value if pin in push-pull mode PCI: Add pci_clear_master() stub for non-CONFIG_PCI scsi: 3w-xxxx: Add error handling for initialization failure in tw_probe() ALSA: ac97: Fix possible NULL dereference in snd_ac97_mixer drm/radeon: fix possible division-by-zero errors fbdev: omapfb: lcd_mipid: Fix an error handling path in mipid_spi_probe() arm64: dts: renesas: ulcb-kf: Remove flow control for SCIF1 IB/hfi1: Fix sdma.h tx->num_descs off-by-one errors soc/fsl/qe: fix usb.c build errors ASoC: es8316: Increment max value for ALC Capture Target Volume control ARM: ep93xx: fix missing-prototype warnings drm/panel: simple: fix active size for Ampire AM-480272H3TMQW-T01H Input: adxl34x - do not hardcode interrupt trigger type ARM: dts: BCM5301X: Drop "clock-names" from the SPI node Input: drv260x - sleep between polling GO bit radeon: avoid double free in ci_dpm_init() netlink: Add __sock_i_ino() for __netlink_diag_dump(). ipvlan: Fix return value of ipvlan_queue_xmit() netfilter: nf_conntrack_sip: fix the ct_sip_parse_numerical_param() return value. lib/ts_bm: reset initial match offset for every block of text gtp: Fix use-after-free in __gtp_encap_destroy(). netlink: do not hard code device address lenth in fdb dumps netlink: fix potential deadlock in netlink_set_err() wifi: ath9k: convert msecs to jiffies where needed wifi: ath9k: Fix possible stall on ath9k_txq_list_has_key() memstick r592: make memstick_debug_get_tpc_name() static kexec: fix a memory leak in crash_shrink_memory() watchdog/perf: more properly prevent false positives with turbo modes watchdog/perf: define dummy watchdog_update_hrtimer_threshold() on correct config wifi: rsi: Do not set MMC_PM_KEEP_POWER in shutdown wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes wifi: ray_cs: Fix an error handling path in ray_probe() wifi: ray_cs: Drop useless status variable in parse_addr() wifi: ray_cs: Utilize strnlen() in parse_addr() wifi: wl3501_cs: Fix an error handling path in wl3501_probe() wl3501_cs: use eth_hw_addr_set() net: create netdev->dev_addr assignment helpers wl3501_cs: Fix misspelling and provide missing documentation wl3501_cs: Remove unnecessary NULL check wl3501_cs: Fix a bunch of formatting issues related to function docs wifi: atmel: Fix an error handling path in atmel_probe() wifi: orinoco: Fix an error handling path in orinoco_cs_probe() wifi: orinoco: Fix an error handling path in spectrum_cs_probe() nfc: llcp: fix possible use of uninitialized variable in nfc_llcp_send_connect() nfc: constify several pointers to u8, char and sk_buff wifi: mwifiex: Fix the size of a memory allocation in mwifiex_ret_802_11_scan() samples/bpf: Fix buffer overflow in tcp_basertt wifi: ath9k: avoid referencing uninit memory in ath9k_wmi_ctrl_rx wifi: ath9k: fix AR9003 mac hardware hang check register offset calculation evm: Complete description of evm_inode_setattr() ARM: 9303/1: kprobes: avoid missing-declaration warnings PM: domains: fix integer overflow issues in genpd_parse_state() clocksource/drivers/cadence-ttc: Fix memory leak in ttc_timer_probe clocksource/drivers/cadence-ttc: Use ttc driver as platform driver clocksource/drivers: Unify the names to timer-* format irqchip/jcore-aic: Fix missing allocation of IRQ descriptors irqchip/jcore-aic: Kill use of irq_create_strict_mappings() md/raid10: fix io loss while replacement replace rdev md/raid10: fix wrong setting of max_corr_read_errors md/raid10: fix overflow of md/safe_mode_delay md/raid10: check slab-out-of-bounds in md_bitmap_get_counter treewide: Remove uninitialized_var() usage drm/amdgpu: Validate VM ioctl flags. scripts/tags.sh: Resolve gtags empty index generation drm/edid: Fix uninitialized variable in drm_cvt_modes() fbdev: imsttfb: Fix use after free bug in imsttfb_probe video: imsttfb: check for ioremap() failures x86/smp: Use dedicated cache-line for mwait_play_dead() gfs2: Don't deref jdesc in evict Linux 4.19.290 x86: fix backwards merge of GDS/SRSO bit xen/netback: Fix buffer overrun triggered by unusual packet Documentation/x86: Fix backwards on/off logic about YMM support x86/xen: Fix secondary processors' FPU initialization KVM: Add GDS_NO support to KVM x86/speculation: Add Kconfig option for GDS x86/speculation: Add force option to GDS mitigation x86/speculation: Add Gather Data Sampling mitigation x86/fpu: Move FPU initialization into arch_cpu_finalize_init() x86/fpu: Mark init functions __init x86/fpu: Remove cpuinfo argument from init functions init, x86: Move mem_encrypt_init() into arch_cpu_finalize_init() init: Invoke arch_cpu_finalize_init() earlier init: Remove check_bugs() leftovers um/cpu: Switch to arch_cpu_finalize_init() sparc/cpu: Switch to arch_cpu_finalize_init() sh/cpu: Switch to arch_cpu_finalize_init() mips/cpu: Switch to arch_cpu_finalize_init() m68k/cpu: Switch to arch_cpu_finalize_init() ia64/cpu: Switch to arch_cpu_finalize_init() ARM: cpu: Switch to arch_cpu_finalize_init() x86/cpu: Switch to arch_cpu_finalize_init() init: Provide arch_cpu_finalize_init() Conflicts: drivers/mmc/core/block.c drivers/mmc/host/sdhci-msm.c drivers/usb/dwc3/core.c drivers/usb/dwc3/gadget.c Change-Id: Id2f4d5c8067f8e5eda39c0eaa5e59d54a394b4c7
1018 lines
30 KiB
Text
1018 lines
30 KiB
Text
# SPDX-License-Identifier: GPL-2.0
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#
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# General architecture dependent options
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#
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#
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# Note: arch/$(SRCARCH)/Kconfig needs to be included first so that it can
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# override the default values in this file.
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#
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source "arch/$(SRCARCH)/Kconfig"
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menu "General architecture-dependent options"
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config CRASH_CORE
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bool
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config KEXEC_CORE
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select CRASH_CORE
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bool
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config HAVE_IMA_KEXEC
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bool
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config HOTPLUG_SMT
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bool
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config OPROFILE
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tristate "OProfile system profiling"
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depends on PROFILING
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depends on HAVE_OPROFILE
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select RING_BUFFER
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select RING_BUFFER_ALLOW_SWAP
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help
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OProfile is a profiling system capable of profiling the
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whole system, include the kernel, kernel modules, libraries,
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and applications.
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If unsure, say N.
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config OPROFILE_EVENT_MULTIPLEX
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bool "OProfile multiplexing support (EXPERIMENTAL)"
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default n
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depends on OPROFILE && X86
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help
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The number of hardware counters is limited. The multiplexing
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feature enables OProfile to gather more events than counters
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are provided by the hardware. This is realized by switching
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between events at a user specified time interval.
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If unsure, say N.
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config HAVE_OPROFILE
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bool
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config OPROFILE_NMI_TIMER
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def_bool y
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depends on PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !PPC64
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config KPROBES
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bool "Kprobes"
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depends on MODULES
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depends on HAVE_KPROBES
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select KALLSYMS
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help
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Kprobes allows you to trap at almost any kernel address and
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execute a callback function. register_kprobe() establishes
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a probepoint and specifies the callback. Kprobes is useful
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for kernel debugging, non-intrusive instrumentation and testing.
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If in doubt, say "N".
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config JUMP_LABEL
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bool "Optimize very unlikely/likely branches"
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depends on HAVE_ARCH_JUMP_LABEL
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depends on CC_HAS_ASM_GOTO
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help
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This option enables a transparent branch optimization that
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makes certain almost-always-true or almost-always-false branch
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conditions even cheaper to execute within the kernel.
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Certain performance-sensitive kernel code, such as trace points,
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scheduler functionality, networking code and KVM have such
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branches and include support for this optimization technique.
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If it is detected that the compiler has support for "asm goto",
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the kernel will compile such branches with just a nop
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instruction. When the condition flag is toggled to true, the
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nop will be converted to a jump instruction to execute the
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conditional block of instructions.
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This technique lowers overhead and stress on the branch prediction
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of the processor and generally makes the kernel faster. The update
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of the condition is slower, but those are always very rare.
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( On 32-bit x86, the necessary options added to the compiler
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flags may increase the size of the kernel slightly. )
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config STATIC_KEYS_SELFTEST
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bool "Static key selftest"
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depends on JUMP_LABEL
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help
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Boot time self-test of the branch patching code.
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config OPTPROBES
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def_bool y
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depends on KPROBES && HAVE_OPTPROBES
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select TASKS_RCU if PREEMPT
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config KPROBES_ON_FTRACE
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def_bool y
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depends on KPROBES && HAVE_KPROBES_ON_FTRACE
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depends on DYNAMIC_FTRACE_WITH_REGS
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help
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If function tracer is enabled and the arch supports full
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passing of pt_regs to function tracing, then kprobes can
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optimize on top of function tracing.
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config UPROBES
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def_bool n
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depends on ARCH_SUPPORTS_UPROBES
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help
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Uprobes is the user-space counterpart to kprobes: they
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enable instrumentation applications (such as 'perf probe')
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to establish unintrusive probes in user-space binaries and
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libraries, by executing handler functions when the probes
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are hit by user-space applications.
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( These probes come in the form of single-byte breakpoints,
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managed by the kernel and kept transparent to the probed
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application. )
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config HAVE_64BIT_ALIGNED_ACCESS
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def_bool 64BIT && !HAVE_EFFICIENT_UNALIGNED_ACCESS
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help
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Some architectures require 64 bit accesses to be 64 bit
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aligned, which also requires structs containing 64 bit values
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to be 64 bit aligned too. This includes some 32 bit
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architectures which can do 64 bit accesses, as well as 64 bit
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architectures without unaligned access.
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This symbol should be selected by an architecture if 64 bit
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accesses are required to be 64 bit aligned in this way even
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though it is not a 64 bit architecture.
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See Documentation/unaligned-memory-access.txt for more
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information on the topic of unaligned memory accesses.
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config HAVE_EFFICIENT_UNALIGNED_ACCESS
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bool
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help
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Some architectures are unable to perform unaligned accesses
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without the use of get_unaligned/put_unaligned. Others are
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unable to perform such accesses efficiently (e.g. trap on
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unaligned access and require fixing it up in the exception
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handler.)
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This symbol should be selected by an architecture if it can
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perform unaligned accesses efficiently to allow different
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code paths to be selected for these cases. Some network
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drivers, for example, could opt to not fix up alignment
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problems with received packets if doing so would not help
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much.
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See Documentation/unaligned-memory-access.txt for more
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information on the topic of unaligned memory accesses.
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config ARCH_USE_BUILTIN_BSWAP
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bool
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help
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Modern versions of GCC (since 4.4) have builtin functions
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for handling byte-swapping. Using these, instead of the old
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inline assembler that the architecture code provides in the
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__arch_bswapXX() macros, allows the compiler to see what's
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happening and offers more opportunity for optimisation. In
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particular, the compiler will be able to combine the byteswap
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with a nearby load or store and use load-and-swap or
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store-and-swap instructions if the architecture has them. It
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should almost *never* result in code which is worse than the
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hand-coded assembler in <asm/swab.h>. But just in case it
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does, the use of the builtins is optional.
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Any architecture with load-and-swap or store-and-swap
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instructions should set this. And it shouldn't hurt to set it
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on architectures that don't have such instructions.
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config KRETPROBES
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def_bool y
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depends on KPROBES && HAVE_KRETPROBES
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config USER_RETURN_NOTIFIER
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bool
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depends on HAVE_USER_RETURN_NOTIFIER
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help
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Provide a kernel-internal notification when a cpu is about to
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switch to user mode.
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config HAVE_IOREMAP_PROT
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bool
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config HAVE_KPROBES
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bool
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config HAVE_KRETPROBES
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bool
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config HAVE_OPTPROBES
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bool
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config HAVE_KPROBES_ON_FTRACE
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bool
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config HAVE_FUNCTION_ERROR_INJECTION
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bool
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config HAVE_NMI
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bool
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#
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# An arch should select this if it provides all these things:
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#
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# task_pt_regs() in asm/processor.h or asm/ptrace.h
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# arch_has_single_step() if there is hardware single-step support
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# arch_has_block_step() if there is hardware block-step support
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# asm/syscall.h supplying asm-generic/syscall.h interface
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# linux/regset.h user_regset interfaces
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# CORE_DUMP_USE_REGSET #define'd in linux/elf.h
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# TIF_SYSCALL_TRACE calls tracehook_report_syscall_{entry,exit}
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# TIF_NOTIFY_RESUME calls tracehook_notify_resume()
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# signal delivery calls tracehook_signal_handler()
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#
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config HAVE_ARCH_TRACEHOOK
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bool
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config HAVE_DMA_CONTIGUOUS
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bool
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config GENERIC_SMP_IDLE_THREAD
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bool
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config GENERIC_IDLE_POLL_SETUP
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bool
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config ARCH_HAS_FORTIFY_SOURCE
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bool
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help
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An architecture should select this when it can successfully
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build and run with CONFIG_FORTIFY_SOURCE.
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# Select if arch has all set_memory_ro/rw/x/nx() functions in asm/cacheflush.h
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config ARCH_HAS_SET_MEMORY
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bool
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config ARCH_HAS_CPU_FINALIZE_INIT
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bool
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# Select if arch init_task must go in the __init_task_data section
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config ARCH_TASK_STRUCT_ON_STACK
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bool
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# Select if arch has its private alloc_task_struct() function
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config ARCH_TASK_STRUCT_ALLOCATOR
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bool
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config HAVE_ARCH_THREAD_STRUCT_WHITELIST
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bool
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depends on !ARCH_TASK_STRUCT_ALLOCATOR
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help
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An architecture should select this to provide hardened usercopy
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knowledge about what region of the thread_struct should be
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whitelisted for copying to userspace. Normally this is only the
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FPU registers. Specifically, arch_thread_struct_whitelist()
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should be implemented. Without this, the entire thread_struct
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field in task_struct will be left whitelisted.
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# Select if arch has its private alloc_thread_stack() function
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config ARCH_THREAD_STACK_ALLOCATOR
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bool
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# Select if arch wants to size task_struct dynamically via arch_task_struct_size:
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config ARCH_WANTS_DYNAMIC_TASK_STRUCT
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bool
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config HAVE_REGS_AND_STACK_ACCESS_API
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bool
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help
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This symbol should be selected by an architecure if it supports
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the API needed to access registers and stack entries from pt_regs,
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declared in asm/ptrace.h
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For example the kprobes-based event tracer needs this API.
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config HAVE_RSEQ
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bool
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depends on HAVE_REGS_AND_STACK_ACCESS_API
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help
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This symbol should be selected by an architecture if it
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supports an implementation of restartable sequences.
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config HAVE_CLK
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bool
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help
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The <linux/clk.h> calls support software clock gating and
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thus are a key power management tool on many systems.
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config HAVE_HW_BREAKPOINT
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bool
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depends on PERF_EVENTS
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config HAVE_MIXED_BREAKPOINTS_REGS
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bool
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depends on HAVE_HW_BREAKPOINT
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help
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Depending on the arch implementation of hardware breakpoints,
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some of them have separate registers for data and instruction
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breakpoints addresses, others have mixed registers to store
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them but define the access type in a control register.
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Select this option if your arch implements breakpoints under the
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latter fashion.
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config HAVE_USER_RETURN_NOTIFIER
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bool
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config HAVE_PERF_EVENTS_NMI
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bool
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help
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System hardware can generate an NMI using the perf event
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subsystem. Also has support for calculating CPU cycle events
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to determine how many clock cycles in a given period.
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config HAVE_HARDLOCKUP_DETECTOR_PERF
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bool
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depends on HAVE_PERF_EVENTS_NMI
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help
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The arch chooses to use the generic perf-NMI-based hardlockup
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detector. Must define HAVE_PERF_EVENTS_NMI.
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config HAVE_NMI_WATCHDOG
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depends on HAVE_NMI
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bool
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help
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The arch provides a low level NMI watchdog. It provides
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asm/nmi.h, and defines its own arch_touch_nmi_watchdog().
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config HAVE_HARDLOCKUP_DETECTOR_ARCH
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bool
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select HAVE_NMI_WATCHDOG
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help
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The arch chooses to provide its own hardlockup detector, which is
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a superset of the HAVE_NMI_WATCHDOG. It also conforms to config
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interfaces and parameters provided by hardlockup detector subsystem.
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config HAVE_PERF_REGS
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bool
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help
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Support selective register dumps for perf events. This includes
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bit-mapping of each registers and a unique architecture id.
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config HAVE_PERF_USER_STACK_DUMP
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bool
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help
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Support user stack dumps for perf event samples. This needs
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access to the user stack pointer which is not unified across
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architectures.
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config HAVE_ARCH_JUMP_LABEL
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bool
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config HAVE_RCU_TABLE_FREE
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bool
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config HAVE_RCU_TABLE_INVALIDATE
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bool
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config ARCH_WANT_IRQS_OFF_ACTIVATE_MM
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bool
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help
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Temporary select until all architectures can be converted to have
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irqs disabled over activate_mm. Architectures that do IPI based TLB
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shootdowns should enable this.
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config ARCH_HAVE_NMI_SAFE_CMPXCHG
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bool
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config HAVE_ALIGNED_STRUCT_PAGE
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bool
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help
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This makes sure that struct pages are double word aligned and that
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e.g. the SLUB allocator can perform double word atomic operations
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on a struct page for better performance. However selecting this
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might increase the size of a struct page by a word.
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config HAVE_CMPXCHG_LOCAL
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bool
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config HAVE_CMPXCHG_DOUBLE
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bool
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config ARCH_WEAK_RELEASE_ACQUIRE
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bool
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config ARCH_WANT_IPC_PARSE_VERSION
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bool
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config ARCH_WANT_COMPAT_IPC_PARSE_VERSION
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bool
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config ARCH_WANT_OLD_COMPAT_IPC
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select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
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bool
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config HAVE_ARCH_SECCOMP_FILTER
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bool
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help
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An arch should select this symbol if it provides all of these things:
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- syscall_get_arch()
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- syscall_get_arguments()
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- syscall_rollback()
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- syscall_set_return_value()
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- SIGSYS siginfo_t support
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- secure_computing is called from a ptrace_event()-safe context
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- secure_computing return value is checked and a return value of -1
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results in the system call being skipped immediately.
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- seccomp syscall wired up
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config SECCOMP_FILTER
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def_bool y
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depends on HAVE_ARCH_SECCOMP_FILTER && SECCOMP && NET
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help
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Enable tasks to build secure computing environments defined
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in terms of Berkeley Packet Filter programs which implement
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task-defined system call filtering polices.
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See Documentation/userspace-api/seccomp_filter.rst for details.
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config HAVE_STACKPROTECTOR
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bool
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help
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An arch should select this symbol if:
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- it has implemented a stack canary (e.g. __stack_chk_guard)
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|
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config CC_HAS_STACKPROTECTOR_NONE
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def_bool $(cc-option,-fno-stack-protector)
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|
|
config STACKPROTECTOR
|
|
bool "Stack Protector buffer overflow detection"
|
|
depends on HAVE_STACKPROTECTOR
|
|
depends on $(cc-option,-fstack-protector)
|
|
default y
|
|
help
|
|
This option turns on the "stack-protector" GCC feature. This
|
|
feature puts, at the beginning of functions, a canary value on
|
|
the stack just before the return address, and validates
|
|
the value just before actually returning. Stack based buffer
|
|
overflows (that need to overwrite this return address) now also
|
|
overwrite the canary, which gets detected and the attack is then
|
|
neutralized via a kernel panic.
|
|
|
|
Functions will have the stack-protector canary logic added if they
|
|
have an 8-byte or larger character array on the stack.
|
|
|
|
This feature requires gcc version 4.2 or above, or a distribution
|
|
gcc with the feature backported ("-fstack-protector").
|
|
|
|
On an x86 "defconfig" build, this feature adds canary checks to
|
|
about 3% of all kernel functions, which increases kernel code size
|
|
by about 0.3%.
|
|
|
|
config STACKPROTECTOR_STRONG
|
|
bool "Strong Stack Protector"
|
|
depends on STACKPROTECTOR
|
|
depends on $(cc-option,-fstack-protector-strong)
|
|
default y
|
|
help
|
|
Functions will have the stack-protector canary logic added in any
|
|
of the following conditions:
|
|
|
|
- local variable's address used as part of the right hand side of an
|
|
assignment or function argument
|
|
- local variable is an array (or union containing an array),
|
|
regardless of array type or length
|
|
- uses register local variables
|
|
|
|
This feature requires gcc version 4.9 or above, or a distribution
|
|
gcc with the feature backported ("-fstack-protector-strong").
|
|
|
|
On an x86 "defconfig" build, this feature adds canary checks to
|
|
about 20% of all kernel functions, which increases the kernel code
|
|
size by about 2%.
|
|
|
|
config LTO
|
|
def_bool n
|
|
|
|
config ARCH_SUPPORTS_LTO_CLANG
|
|
bool
|
|
help
|
|
An architecture should select this option if it supports:
|
|
- compiling with clang,
|
|
- compiling inline assembly with clang's integrated assembler,
|
|
- and linking with LLD.
|
|
|
|
config ARCH_SUPPORTS_THINLTO
|
|
bool
|
|
help
|
|
An architecture should select this if it supports clang's ThinLTO.
|
|
|
|
config THINLTO
|
|
bool "Use clang ThinLTO (EXPERIMENTAL)"
|
|
depends on LTO_CLANG && ARCH_SUPPORTS_THINLTO
|
|
default y
|
|
help
|
|
Use ThinLTO to speed up Link Time Optimization.
|
|
|
|
choice
|
|
prompt "Link-Time Optimization (LTO) (EXPERIMENTAL)"
|
|
default LTO_NONE
|
|
help
|
|
This option turns on Link-Time Optimization (LTO).
|
|
|
|
config LTO_NONE
|
|
bool "None"
|
|
|
|
config LTO_CLANG
|
|
bool "Use clang Link Time Optimization (LTO) (EXPERIMENTAL)"
|
|
depends on ARCH_SUPPORTS_LTO_CLANG
|
|
depends on !FTRACE_MCOUNT_RECORD || HAVE_C_RECORDMCOUNT
|
|
depends on !KASAN
|
|
depends on CC_IS_CLANG && LD_IS_LLD
|
|
select LTO
|
|
help
|
|
This option enables clang's Link Time Optimization (LTO), which allows
|
|
the compiler to optimize the kernel globally at link time. If you
|
|
enable this option, the compiler generates LLVM IR instead of object
|
|
files, and the actual compilation from IR occurs at the LTO link step,
|
|
which may take several minutes.
|
|
|
|
If you select this option, you must compile the kernel with clang and
|
|
LLD.
|
|
|
|
endchoice
|
|
|
|
config CFI
|
|
bool
|
|
|
|
config CFI_PERMISSIVE
|
|
bool "Use CFI in permissive mode"
|
|
depends on CFI
|
|
help
|
|
When selected, Control Flow Integrity (CFI) violations result in a
|
|
warning instead of a kernel panic. This option is useful for finding
|
|
CFI violations in drivers during development.
|
|
|
|
config CFI_CLANG
|
|
bool "Use clang Control Flow Integrity (CFI) (EXPERIMENTAL)"
|
|
depends on LTO_CLANG
|
|
depends on KALLSYMS
|
|
select CFI
|
|
help
|
|
This option enables clang Control Flow Integrity (CFI), which adds
|
|
runtime checking for indirect function calls.
|
|
|
|
config CFI_CLANG_SHADOW
|
|
bool "Use CFI shadow to speed up cross-module checks"
|
|
default y
|
|
depends on CFI_CLANG
|
|
help
|
|
If you select this option, the kernel builds a fast look-up table of
|
|
CFI check functions in loaded modules to reduce overhead.
|
|
|
|
config ARCH_SUPPORTS_SHADOW_CALL_STACK
|
|
bool
|
|
help
|
|
An architecture should select this if it supports Clang's Shadow
|
|
Call Stack, has asm/scs.h, and implements runtime support for shadow
|
|
stack switching.
|
|
|
|
config SHADOW_CALL_STACK
|
|
bool "Clang Shadow Call Stack"
|
|
depends on ARCH_SUPPORTS_SHADOW_CALL_STACK
|
|
help
|
|
This option enables Clang's Shadow Call Stack, which uses a
|
|
shadow stack to protect function return addresses from being
|
|
overwritten by an attacker. More information can be found from
|
|
Clang's documentation:
|
|
|
|
https://clang.llvm.org/docs/ShadowCallStack.html
|
|
|
|
Note that security guarantees in the kernel differ from the ones
|
|
documented for user space. The kernel must store addresses of shadow
|
|
stacks used by other tasks and interrupt handlers in memory, which
|
|
means an attacker capable reading and writing arbitrary memory may
|
|
be able to locate them and hijack control flow by modifying shadow
|
|
stacks that are not currently in use.
|
|
|
|
config SHADOW_CALL_STACK_VMAP
|
|
bool "Use virtually mapped shadow call stacks"
|
|
depends on SHADOW_CALL_STACK
|
|
help
|
|
Use virtually mapped shadow call stacks. Selecting this option
|
|
provides better stack exhaustion protection, but increases per-thread
|
|
memory consumption as a full page is allocated for each shadow stack.
|
|
|
|
config HAVE_ARCH_WITHIN_STACK_FRAMES
|
|
bool
|
|
help
|
|
An architecture should select this if it can walk the kernel stack
|
|
frames to determine if an object is part of either the arguments
|
|
or local variables (i.e. that it excludes saved return addresses,
|
|
and similar) by implementing an inline arch_within_stack_frames(),
|
|
which is used by CONFIG_HARDENED_USERCOPY.
|
|
|
|
config HAVE_CONTEXT_TRACKING
|
|
bool
|
|
help
|
|
Provide kernel/user boundaries probes necessary for subsystems
|
|
that need it, such as userspace RCU extended quiescent state.
|
|
Syscalls need to be wrapped inside user_exit()-user_enter() through
|
|
the slow path using TIF_NOHZ flag. Exceptions handlers must be
|
|
wrapped as well. Irqs are already protected inside
|
|
rcu_irq_enter/rcu_irq_exit() but preemption or signal handling on
|
|
irq exit still need to be protected.
|
|
|
|
config HAVE_VIRT_CPU_ACCOUNTING
|
|
bool
|
|
|
|
config ARCH_HAS_SCALED_CPUTIME
|
|
bool
|
|
|
|
config HAVE_VIRT_CPU_ACCOUNTING_GEN
|
|
bool
|
|
default y if 64BIT
|
|
help
|
|
With VIRT_CPU_ACCOUNTING_GEN, cputime_t becomes 64-bit.
|
|
Before enabling this option, arch code must be audited
|
|
to ensure there are no races in concurrent read/write of
|
|
cputime_t. For example, reading/writing 64-bit cputime_t on
|
|
some 32-bit arches may require multiple accesses, so proper
|
|
locking is needed to protect against concurrent accesses.
|
|
|
|
|
|
config HAVE_IRQ_TIME_ACCOUNTING
|
|
bool
|
|
help
|
|
Archs need to ensure they use a high enough resolution clock to
|
|
support irq time accounting and then call enable_sched_clock_irqtime().
|
|
|
|
config HAVE_ARCH_TRANSPARENT_HUGEPAGE
|
|
bool
|
|
|
|
config HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
|
|
bool
|
|
|
|
config HAVE_ARCH_HUGE_VMAP
|
|
bool
|
|
|
|
config HAVE_ARCH_SOFT_DIRTY
|
|
bool
|
|
|
|
config HAVE_MOD_ARCH_SPECIFIC
|
|
bool
|
|
help
|
|
The arch uses struct mod_arch_specific to store data. Many arches
|
|
just need a simple module loader without arch specific data - those
|
|
should not enable this.
|
|
|
|
config MODULES_USE_ELF_RELA
|
|
bool
|
|
help
|
|
Modules only use ELF RELA relocations. Modules with ELF REL
|
|
relocations will give an error.
|
|
|
|
config MODULES_USE_ELF_REL
|
|
bool
|
|
help
|
|
Modules only use ELF REL relocations. Modules with ELF RELA
|
|
relocations will give an error.
|
|
|
|
config HAVE_IRQ_EXIT_ON_IRQ_STACK
|
|
bool
|
|
help
|
|
Architecture doesn't only execute the irq handler on the irq stack
|
|
but also irq_exit(). This way we can process softirqs on this irq
|
|
stack instead of switching to a new one when we call __do_softirq()
|
|
in the end of an hardirq.
|
|
This spares a stack switch and improves cache usage on softirq
|
|
processing.
|
|
|
|
config PGTABLE_LEVELS
|
|
int
|
|
default 2
|
|
|
|
config ARCH_HAS_ELF_RANDOMIZE
|
|
bool
|
|
help
|
|
An architecture supports choosing randomized locations for
|
|
stack, mmap, brk, and ET_DYN. Defined functions:
|
|
- arch_mmap_rnd()
|
|
- arch_randomize_brk()
|
|
|
|
config HAVE_ARCH_MMAP_RND_BITS
|
|
bool
|
|
help
|
|
An arch should select this symbol if it supports setting a variable
|
|
number of bits for use in establishing the base address for mmap
|
|
allocations, has MMU enabled and provides values for both:
|
|
- ARCH_MMAP_RND_BITS_MIN
|
|
- ARCH_MMAP_RND_BITS_MAX
|
|
|
|
config HAVE_EXIT_THREAD
|
|
bool
|
|
help
|
|
An architecture implements exit_thread.
|
|
|
|
config ARCH_MMAP_RND_BITS_MIN
|
|
int
|
|
|
|
config ARCH_MMAP_RND_BITS_MAX
|
|
int
|
|
|
|
config ARCH_MMAP_RND_BITS_DEFAULT
|
|
int
|
|
|
|
config ARCH_MMAP_RND_BITS
|
|
int "Number of bits to use for ASLR of mmap base address" if EXPERT
|
|
range ARCH_MMAP_RND_BITS_MIN ARCH_MMAP_RND_BITS_MAX
|
|
default ARCH_MMAP_RND_BITS_DEFAULT if ARCH_MMAP_RND_BITS_DEFAULT
|
|
default ARCH_MMAP_RND_BITS_MIN
|
|
depends on HAVE_ARCH_MMAP_RND_BITS
|
|
help
|
|
This value can be used to select the number of bits to use to
|
|
determine the random offset to the base address of vma regions
|
|
resulting from mmap allocations. This value will be bounded
|
|
by the architecture's minimum and maximum supported values.
|
|
|
|
This value can be changed after boot using the
|
|
/proc/sys/vm/mmap_rnd_bits tunable
|
|
|
|
config HAVE_ARCH_MMAP_RND_COMPAT_BITS
|
|
bool
|
|
help
|
|
An arch should select this symbol if it supports running applications
|
|
in compatibility mode, supports setting a variable number of bits for
|
|
use in establishing the base address for mmap allocations, has MMU
|
|
enabled and provides values for both:
|
|
- ARCH_MMAP_RND_COMPAT_BITS_MIN
|
|
- ARCH_MMAP_RND_COMPAT_BITS_MAX
|
|
|
|
config ARCH_MMAP_RND_COMPAT_BITS_MIN
|
|
int
|
|
|
|
config ARCH_MMAP_RND_COMPAT_BITS_MAX
|
|
int
|
|
|
|
config ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
|
|
int
|
|
|
|
config ARCH_MMAP_RND_COMPAT_BITS
|
|
int "Number of bits to use for ASLR of mmap base address for compatible applications" if EXPERT
|
|
range ARCH_MMAP_RND_COMPAT_BITS_MIN ARCH_MMAP_RND_COMPAT_BITS_MAX
|
|
default ARCH_MMAP_RND_COMPAT_BITS_DEFAULT if ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
|
|
default ARCH_MMAP_RND_COMPAT_BITS_MIN
|
|
depends on HAVE_ARCH_MMAP_RND_COMPAT_BITS
|
|
help
|
|
This value can be used to select the number of bits to use to
|
|
determine the random offset to the base address of vma regions
|
|
resulting from mmap allocations for compatible applications This
|
|
value will be bounded by the architecture's minimum and maximum
|
|
supported values.
|
|
|
|
This value can be changed after boot using the
|
|
/proc/sys/vm/mmap_rnd_compat_bits tunable
|
|
|
|
config HAVE_ARCH_COMPAT_MMAP_BASES
|
|
bool
|
|
help
|
|
This allows 64bit applications to invoke 32-bit mmap() syscall
|
|
and vice-versa 32-bit applications to call 64-bit mmap().
|
|
Required for applications doing different bitness syscalls.
|
|
|
|
config HAVE_COPY_THREAD_TLS
|
|
bool
|
|
help
|
|
Architecture provides copy_thread_tls to accept tls argument via
|
|
normal C parameter passing, rather than extracting the syscall
|
|
argument from pt_regs.
|
|
|
|
config HAVE_STACK_VALIDATION
|
|
bool
|
|
help
|
|
Architecture supports the 'objtool check' host tool command, which
|
|
performs compile-time stack metadata validation.
|
|
|
|
config HAVE_RELIABLE_STACKTRACE
|
|
bool
|
|
help
|
|
Architecture has a save_stack_trace_tsk_reliable() function which
|
|
only returns a stack trace if it can guarantee the trace is reliable.
|
|
|
|
config HAVE_ARCH_HASH
|
|
bool
|
|
default n
|
|
help
|
|
If this is set, the architecture provides an <asm/hash.h>
|
|
file which provides platform-specific implementations of some
|
|
functions in <linux/hash.h> or fs/namei.c.
|
|
|
|
config ISA_BUS_API
|
|
def_bool ISA
|
|
|
|
#
|
|
# ABI hall of shame
|
|
#
|
|
config CLONE_BACKWARDS
|
|
bool
|
|
help
|
|
Architecture has tls passed as the 4th argument of clone(2),
|
|
not the 5th one.
|
|
|
|
config CLONE_BACKWARDS2
|
|
bool
|
|
help
|
|
Architecture has the first two arguments of clone(2) swapped.
|
|
|
|
config CLONE_BACKWARDS3
|
|
bool
|
|
help
|
|
Architecture has tls passed as the 3rd argument of clone(2),
|
|
not the 5th one.
|
|
|
|
config ODD_RT_SIGACTION
|
|
bool
|
|
help
|
|
Architecture has unusual rt_sigaction(2) arguments
|
|
|
|
config OLD_SIGSUSPEND
|
|
bool
|
|
help
|
|
Architecture has old sigsuspend(2) syscall, of one-argument variety
|
|
|
|
config OLD_SIGSUSPEND3
|
|
bool
|
|
help
|
|
Even weirder antique ABI - three-argument sigsuspend(2)
|
|
|
|
config OLD_SIGACTION
|
|
bool
|
|
help
|
|
Architecture has old sigaction(2) syscall. Nope, not the same
|
|
as OLD_SIGSUSPEND | OLD_SIGSUSPEND3 - alpha has sigsuspend(2),
|
|
but fairly different variant of sigaction(2), thanks to OSF/1
|
|
compatibility...
|
|
|
|
config COMPAT_OLD_SIGACTION
|
|
bool
|
|
|
|
config 64BIT_TIME
|
|
def_bool ARCH_HAS_64BIT_TIME
|
|
help
|
|
This should be selected by all architectures that need to support
|
|
new system calls with a 64-bit time_t. This is relevant on all 32-bit
|
|
architectures, and 64-bit architectures as part of compat syscall
|
|
handling.
|
|
|
|
config COMPAT_32BIT_TIME
|
|
def_bool (!64BIT && 64BIT_TIME) || COMPAT
|
|
help
|
|
This enables 32 bit time_t support in addition to 64 bit time_t support.
|
|
This is relevant on all 32-bit architectures, and 64-bit architectures
|
|
as part of compat syscall handling.
|
|
|
|
config ARCH_NO_COHERENT_DMA_MMAP
|
|
bool
|
|
|
|
config ARCH_NO_PREEMPT
|
|
bool
|
|
|
|
config CPU_NO_EFFICIENT_FFS
|
|
def_bool n
|
|
|
|
config HAVE_ARCH_VMAP_STACK
|
|
def_bool n
|
|
help
|
|
An arch should select this symbol if it can support kernel stacks
|
|
in vmalloc space. This means:
|
|
|
|
- vmalloc space must be large enough to hold many kernel stacks.
|
|
This may rule out many 32-bit architectures.
|
|
|
|
- Stacks in vmalloc space need to work reliably. For example, if
|
|
vmap page tables are created on demand, either this mechanism
|
|
needs to work while the stack points to a virtual address with
|
|
unpopulated page tables or arch code (switch_to() and switch_mm(),
|
|
most likely) needs to ensure that the stack's page table entries
|
|
are populated before running on a possibly unpopulated stack.
|
|
|
|
- If the stack overflows into a guard page, something reasonable
|
|
should happen. The definition of "reasonable" is flexible, but
|
|
instantly rebooting without logging anything would be unfriendly.
|
|
|
|
config VMAP_STACK
|
|
default y
|
|
bool "Use a virtually-mapped stack"
|
|
depends on HAVE_ARCH_VMAP_STACK && !KASAN
|
|
---help---
|
|
Enable this if you want the use virtually-mapped kernel stacks
|
|
with guard pages. This causes kernel stack overflows to be
|
|
caught immediately rather than causing difficult-to-diagnose
|
|
corruption.
|
|
|
|
This is presently incompatible with KASAN because KASAN expects
|
|
the stack to map directly to the KASAN shadow map using a formula
|
|
that is incorrect if the stack is in vmalloc space.
|
|
|
|
config ARCH_OPTIONAL_KERNEL_RWX
|
|
def_bool n
|
|
|
|
config ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
|
|
def_bool n
|
|
|
|
config ARCH_HAS_STRICT_KERNEL_RWX
|
|
def_bool n
|
|
|
|
config STRICT_KERNEL_RWX
|
|
bool "Make kernel text and rodata read-only" if ARCH_OPTIONAL_KERNEL_RWX
|
|
depends on ARCH_HAS_STRICT_KERNEL_RWX
|
|
default !ARCH_OPTIONAL_KERNEL_RWX || ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
|
|
help
|
|
If this is set, kernel text and rodata memory will be made read-only,
|
|
and non-text memory will be made non-executable. This provides
|
|
protection against certain security exploits (e.g. executing the heap
|
|
or modifying text)
|
|
|
|
These features are considered standard security practice these days.
|
|
You should say Y here in almost all cases.
|
|
|
|
config ARCH_HAS_STRICT_MODULE_RWX
|
|
def_bool n
|
|
|
|
config STRICT_MODULE_RWX
|
|
bool "Set loadable kernel module data as NX and text as RO" if ARCH_OPTIONAL_KERNEL_RWX
|
|
depends on ARCH_HAS_STRICT_MODULE_RWX && MODULES
|
|
default !ARCH_OPTIONAL_KERNEL_RWX || ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
|
|
help
|
|
If this is set, module text and rodata memory will be made read-only,
|
|
and non-text memory will be made non-executable. This provides
|
|
protection against certain security exploits (e.g. writing to text)
|
|
|
|
# select if the architecture provides an asm/dma-direct.h header
|
|
config ARCH_HAS_PHYS_TO_DMA
|
|
bool
|
|
|
|
config ARCH_HAS_REFCOUNT
|
|
bool
|
|
help
|
|
An architecture selects this when it has implemented refcount_t
|
|
using open coded assembly primitives that provide an optimized
|
|
refcount_t implementation, possibly at the expense of some full
|
|
refcount state checks of CONFIG_REFCOUNT_FULL=y.
|
|
|
|
The refcount overflow check behavior, however, must be retained.
|
|
Catching overflows is the primary security concern for protecting
|
|
against bugs in reference counts.
|
|
|
|
config REFCOUNT_FULL
|
|
bool "Perform full reference count validation at the expense of speed"
|
|
help
|
|
Enabling this switches the refcounting infrastructure from a fast
|
|
unchecked atomic_t implementation to a fully state checked
|
|
implementation, which can be (slightly) slower but provides protections
|
|
against various use-after-free conditions that can be used in
|
|
security flaw exploits.
|
|
|
|
config HAVE_ARCH_COMPILER_H
|
|
bool
|
|
help
|
|
An architecture can select this if it provides an
|
|
asm/compiler.h header that should be included after
|
|
linux/compiler-*.h in order to override macro definitions that those
|
|
headers generally provide.
|
|
|
|
config HAVE_ARCH_PREL32_RELOCATIONS
|
|
bool
|
|
help
|
|
May be selected by an architecture if it supports place-relative
|
|
32-bit relocations, both in the toolchain and in the module loader,
|
|
in which case relative references can be used in special sections
|
|
for PCI fixup, initcalls etc which are only half the size on 64 bit
|
|
architectures, and don't require runtime relocation on relocatable
|
|
kernels.
|
|
|
|
config PANIC_ON_REFCOUNT_ERROR
|
|
bool "Kernel panic on refcount error detection"
|
|
depends on REFCOUNT_FULL
|
|
help
|
|
If enabled, the kernel will panic when the refcount library
|
|
has detected any type of error (e.g. potential use-after-free
|
|
or potential memory-leaks) with an object associated with that
|
|
reference counter.
|
|
|
|
config ARCH_USE_MEMREMAP_PROT
|
|
bool
|
|
|
|
# Select if the architecture has support for applying RELR relocations.
|
|
config ARCH_HAS_RELR
|
|
bool
|
|
|
|
config RELR
|
|
bool "Use RELR relocation packing"
|
|
depends on ARCH_HAS_RELR && TOOLS_SUPPORT_RELR
|
|
default y
|
|
help
|
|
Store the kernel's dynamic relocations in the RELR relocation packing
|
|
format. Requires a compatible linker (LLD supports this feature), as
|
|
well as compatible NM and OBJCOPY utilities (llvm-nm and llvm-objcopy
|
|
are compatible).
|
|
|
|
source "kernel/gcov/Kconfig"
|
|
|
|
source "scripts/gcc-plugins/Kconfig"
|
|
|
|
endmenu
|