97 Commits

Author	SHA1	Message	Date
Raghavendra Rao Ananta	5bd75403be	Merge remote-tracking branch 'remotes/origin/tmp-f686d9f' into msm-lahaina ... * remotes/origin/tmp-f686d9f: ANDROID: update abi_gki_aarch64.xml for 5.2-rc6 Linux 5.2-rc6 Revert "iommu/vt-d: Fix lock inversion between iommu->lock and device_domain_lock" Bluetooth: Fix regression with minimum encryption key size alignment tcp: refine memory limit test in tcp_fragment() x86/vdso: Prevent segfaults due to hoisted vclock reads SUNRPC: Fix a credential refcount leak Revert "SUNRPC: Declare RPC timers as TIMER_DEFERRABLE" net :sunrpc :clnt :Fix xps refcount imbalance on the error path NFS4: Only set creation opendata if O_CREAT ANDROID: gki_defconfig: workaround to enable configs ANDROID: gki_defconfig: more configs for partners ARM: 8867/1: vdso: pass --be8 to linker if necessary KVM: nVMX: reorganize initial steps of vmx_set_nested_state KVM: PPC: Book3S HV: Invalidate ERAT when flushing guest TLB entries habanalabs: use u64_to_user_ptr() for reading user pointers nfsd: replace Jeff by Chuck as nfsd co-maintainer inet: clear num_timeout reqsk_alloc() PCI/P2PDMA: Ignore root complex whitelist when an IOMMU is present net: mvpp2: debugfs: Add pmap to fs dump ipv6: Default fib6_type to RTN_UNICAST when not set net: hns3: Fix inconsistent indenting net/af_iucv: always register net_device notifier net/af_iucv: build proper skbs for HiperTransport net/af_iucv: remove GFP_DMA restriction for HiperTransport doc: fix documentation about UIO_MEM_LOGICAL using MAINTAINERS / Documentation: Thorsten Scherer is the successor of Gavin Schenk docs: fb: Add TER16x32 to the available font names MAINTAINERS: fpga: hand off maintainership to Moritz treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 507 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 506 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 503 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 502 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 501 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 498 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 496 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 495 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 491 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 490 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 489 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 488 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 487 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 486 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 485 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 484 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 481 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 480 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 479 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 477 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 475 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 474 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 473 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 472 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 471 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 469 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 468 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 467 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 466 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 465 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 464 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 463 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 462 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 461 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 460 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 457 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 456 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 455 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 454 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 452 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 451 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 250 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 247 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 246 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 245 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 244 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 243 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 239 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 238 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 237 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 235 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 233 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 231 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 226 KVM: arm/arm64: Fix emulated ptimer irq injection net: dsa: mv88e6xxx: fix shift of FID bits in mv88e6185_g1_vtu_loadpurge() tests: kvm: Check for a kernel warning kvm: tests: Sort tests in the Makefile alphabetically KVM: x86/mmu: Allocate PAE root array when using SVM's 32-bit NPT KVM: x86: Modify struct kvm_nested_state to have explicit fields for data fanotify: update connector fsid cache on add mark quota: fix a problem about transfer quota drm/i915: Don't clobber M/N values during fastset check powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac ovl: make i_ino consistent with st_ino in more cases scsi: qla2xxx: Fix hardlockup in abort command during driver remove scsi: ufs: Avoid runtime suspend possibly being blocked forever scsi: qedi: update driver version to 8.37.0.20 scsi: qedi: Check targetname while finding boot target information hvsock: fix epollout hang from race condition net/udp_gso: Allow TX timestamp with UDP GSO net: netem: fix use after free and double free with packet corruption net: netem: fix backlog accounting for corrupted GSO frames net: lio_core: fix potential sign-extension overflow on large shift tipc: pass tunnel dev as NULL to udp_tunnel(6)_xmit_skb ip6_tunnel: allow not to count pkts on tstats by passing dev as NULL ip_tunnel: allow not to count pkts on tstats by setting skb's dev to NULL apparmor: reset pos on failure to unpack for various functions apparmor: enforce nullbyte at end of tag string apparmor: fix PROFILE_MEDIATES for untrusted input RDMA/efa: Handle mmap insertions overflow tun: wake up waitqueues after IFF_UP is set drm: return -EFAULT if copy_to_user() fails net: remove duplicate fetch in sock_getsockopt tipc: fix issues with early FAILOVER_MSG from peer bnx2x: Check if transceiver implements DDM before access xhci: detect USB 3.2 capable host controllers correctly usb: xhci: Don't try to recover an endpoint if port is in error state. KVM: fix typo in documentation drm/panfrost: Make sure a BO is only unmapped when appropriate md: fix for divide error in status_resync soc: ixp4xx: npe: Fix an IS_ERR() vs NULL check in probe arm64/mm: don't initialize pgd_cache twice MAINTAINERS: Update my email address arm64/sve: <uapi/asm/ptrace.h> should not depend on <uapi/linux/prctl.h> ovl: fix typo in MODULE_PARM_DESC ovl: fix bogus -Wmaybe-unitialized warning ovl: don't fail with disconnected lower NFS mmc: core: Prevent processing SDIO IRQs when the card is suspended mmc: sdhci: sdhci-pci-o2micro: Correctly set bus width when tuning brcmfmac: sdio: Don't tune while the card is off mmc: core: Add sdio_retune_hold_now() and sdio_retune_release() brcmfmac: sdio: Disable auto-tuning around commands expected to fail mmc: core: API to temporarily disable retuning for SDIO CRC errors Revert "brcmfmac: disable command decode in sdio_aos" ARM: ixp4xx: include irqs.h where needed ARM: ixp4xx: mark ixp4xx_irq_setup as __init ARM: ixp4xx: don't select SERIAL_OF_PLATFORM firmware: trusted_foundations: add ARMv7 dependency usb: dwc2: Use generic PHY width in params setup RDMA/efa: Fix success return value in case of error IB/hfi1: Handle port down properly in pio IB/hfi1: Handle wakeup of orphaned QPs for pio IB/hfi1: Wakeup QPs orphaned on wait list after flush IB/hfi1: Use aborts to trigger RC throttling IB/hfi1: Create inline to get extended headers IB/hfi1: Silence txreq allocation warnings IB/hfi1: Avoid hardlockup with flushlist_lock KVM: PPC: Book3S HV: Only write DAWR[X] when handling h_set_dawr in real mode KVM: PPC: Book3S HV: Fix r3 corruption in h_set_dabr() fs/namespace: fix unprivileged mount propagation vfs: fsmount: add missing mntget() cifs: fix GlobalMid_Lock bug in cifs_reconnect SMB3: retry on STATUS_INSUFFICIENT_RESOURCES instead of failing write staging: erofs: add requirements field in superblock arm64: ssbd: explicitly depend on <linux/prctl.h> block: fix page leak when merging to same page block: return from __bio_try_merge_page if merging occured in the same page Btrfs: fix failure to persist compression property xattr deletion on fsync riscv: remove unused barrier defines usb: chipidea: udc: workaround for endpoint conflict issue MAINTAINERS: Change QCOM repo location mmc: mediatek: fix SDIO IRQ detection issue mmc: mediatek: fix SDIO IRQ interrupt handle flow mmc: core: complete HS400 before checking status riscv: mm: synchronize MMU after pte change MAINTAINERS: Update my email address to use @kernel.org ANDROID: update abi_gki_aarch64.xml for 5.2-rc5 riscv: dts: add initial board data for the SiFive HiFive Unleashed riscv: dts: add initial support for the SiFive FU540-C000 SoC dt-bindings: riscv: convert cpu binding to json-schema dt-bindings: riscv: sifive: add YAML documentation for the SiFive FU540 arch: riscv: add support for building DTB files from DT source data drm/i915/gvt: ignore unexpected pvinfo write lapb: fixed leak of control-blocks. tipc: purge deferredq list for each grp member in tipc_group_delete ax25: fix inconsistent lock state in ax25_destroy_timer neigh: fix use-after-free read in pneigh_get_next tcp: fix compile error if !CONFIG_SYSCTL hv_sock: Suppress bogus "may be used uninitialized" warnings be2net: Fix number of Rx queues used for flow hashing net: handle 802.1P vlan 0 packets properly Linux 5.2-rc5 tcp: enforce tcp_min_snd_mss in tcp_mtu_probing() tcp: add tcp_min_snd_mss sysctl tcp: tcp_fragment() should apply sane memory limits tcp: limit payload size of sacked skbs Revert "net: phylink: set the autoneg state in phylink_phy_change" bpf: fix nested bpf tracepoints with per-cpu data bpf: Fix out of bounds memory access in bpf_sk_storage vsock/virtio: set SOCK_DONE on peer shutdown net: dsa: rtl8366: Fix up VLAN filtering net: phylink: set the autoneg state in phylink_phy_change powerpc/32: fix build failure on book3e with KVM powerpc/booke: fix fast syscall entry on SMP powerpc/32s: fix initial setup of segment registers on secondary CPU x86/microcode, cpuhotplug: Add a microcode loader CPU hotplug callback net: add high_order_alloc_disable sysctl/static key tcp: add tcp_tx_skb_cache sysctl tcp: add tcp_rx_skb_cache sysctl sysctl: define proc_do_static_key() hv_netvsc: Set probe mode to sync net: sched: flower: don't call synchronize_rcu() on mask creation net: dsa: fix warning same module names sctp: Free cookie before we memdup a new one net: dsa: microchip: Don't try to read stats for unused ports qmi_wwan: extend permitted QMAP mux_id value range qmi_wwan: avoid RCU stalls on device disconnect when in QMAP mode qmi_wwan: add network device usage statistics for qmimux devices qmi_wwan: add support for QMAP padding in the RX path bpf, x64: fix stack layout of JITed bpf code Smack: Restore the smackfsdef mount option and add missing prefixes bpf, devmap: Add missing RCU read lock on flush bpf, devmap: Add missing bulk queue free bpf, devmap: Fix premature entry free on destroying map ftrace: Fix NULL pointer dereference in free_ftrace_func_mapper() module: Fix livepatch/ftrace module text permissions race tracing/uprobe: Fix obsolete comment on trace_uprobe_create() tracing/uprobe: Fix NULL pointer dereference in trace_uprobe_create() tracing: Make two symbols static tracing: avoid build warning with HAVE_NOP_MCOUNT tracing: Fix out-of-range read in trace_stack_print() gfs2: Fix rounding error in gfs2_iomap_page_prepare net: phylink: further mac_config documentation improvements nfc: Ensure presence of required attributes in the deactivate_target handler btrfs: start readahead also in seed devices x86/kasan: Fix boot with 5-level paging and KASAN cfg80211: report measurement start TSF correctly cfg80211: fix memory leak of wiphy device name cfg80211: util: fix bit count off by one mac80211: do not start any work during reconfigure flow cfg80211: use BIT_ULL in cfg80211_parse_mbssid_data() mac80211: only warn once on chanctx_conf being NULL mac80211: drop robust management frames from unknown TA gpu: ipu-v3: image-convert: Fix image downsize coefficients gpu: ipu-v3: image-convert: Fix input bytesperline for packed formats gpu: ipu-v3: image-convert: Fix input bytesperline width/height align thunderbolt: Implement CIO reset correctly for Titan Ridge ARM: davinci: da8xx: specify dma_coherent_mask for lcdc ARM: davinci: da850-evm: call regulator_has_full_constraints() timekeeping: Repair ktime_get_coarse*() granularity Revert "ALSA: hda/realtek - Improve the headset mic for Acer Aspire laptops" ANDROID: update abi_gki_aarch64.xml mm/devm_memremap_pages: fix final page put race PCI/P2PDMA: track pgmap references per resource, not globally lib/genalloc: introduce chunk owners PCI/P2PDMA: fix the gen_pool_add_virt() failure path mm/devm_memremap_pages: introduce devm_memunmap_pages drivers/base/devres: introduce devm_release_action() mm/vmscan.c: fix trying to reclaim unevictable LRU page coredump: fix race condition between collapse_huge_page() and core dumping mm/mlock.c: change count_mm_mlocked_page_nr return type mm: mmu_gather: remove __tlb_reset_range() for force flush fs/ocfs2: fix race in ocfs2_dentry_attach_lock() mm/vmscan.c: fix recent_rotated history mm/mlock.c: mlockall error for flag MCL_ONFAULT scripts/decode_stacktrace.sh: prefix addr2line with $CROSS_COMPILE mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node mm: memcontrol: don't batch updates of local VM stats and events PCI: PM: Skip devices in D0 for suspend-to-idle ANDROID: Removed extraneous configs from gki powerpc/bpf: use unsigned division instruction for 64-bit operations bpf: fix div64 overflow tests to properly detect errors bpf: sync BPF_FIB_LOOKUP flag changes with BPF uapi bpf: simplify definition of BPF_FIB_LOOKUP related flags cifs: add spinlock for the openFileList to cifsInodeInfo cifs: fix panic in smb2_reconnect x86/fpu: Don't use current->mm to check for a kthread KVM: nVMX: use correct clean fields when copying from eVMCS vfio-ccw: Destroy kmem cache region on module exit block/ps3vram: Use %llu to format sector_t after LBDAF removal libata: Extend quirks for the ST1000LM024 drives with NOLPM quirk bcache: only set BCACHE_DEV_WB_RUNNING when cached device attached bcache: fix stack corruption by PRECEDING_KEY() arm64/sve: Fix missing SVE/FPSIMD endianness conversions blk-mq: remove WARN_ON(!q->elevator) from blk_mq_sched_free_requests blkio-controller.txt: Remove references to CFQ block/switching-sched.txt: Update to blk-mq schedulers null_blk: remove duplicate check for report zone blk-mq: no need to check return value of debugfs_create functions io_uring: fix memory leak of UNIX domain socket inode block: force select mq-deadline for zoned block devices binder: fix possible UAF when freeing buffer drm/amdgpu: return 0 by default in amdgpu_pm_load_smu_firmware drm/amdgpu: Fix bounds checking in amdgpu_ras_is_supported() ANDROID: x86 gki_defconfig: enable DMA_CMA ANDROID: Fixed x86 regression ANDROID: gki_defconfig: enable DMA_CMA Input: synaptics - enable SMBus on ThinkPad E480 and E580 net: mvpp2: prs: Use the correct helpers when removing all VID filters net: mvpp2: prs: Fix parser range for VID filtering mlxsw: spectrum: Disallow prio-tagged packets when PVID is removed mlxsw: spectrum_buffers: Reduce pool size on Spectrum-2 selftests: tc_flower: Add TOS matching test mlxsw: spectrum_flower: Fix TOS matching selftests: mlxsw: Test nexthop offload indication mlxsw: spectrum_router: Refresh nexthop neighbour when it becomes dead mlxsw: spectrum: Use different seeds for ECMP and LAG hash net: tls, correctly account for copied bytes with multiple sk_msgs vrf: Increment Icmp6InMsgs on the original netdev cpuset: restore sanity to cpuset_cpus_allowed_fallback() net: ethtool: Allow matching on vlan DEI bit linux-next: DOC: RDS: Fix a typo in rds.txt x86/kgdb: Return 0 from kgdb_arch_set_breakpoint() mpls: fix af_mpls dependencies for real selinux: fix a missing-check bug in selinux_sb_eat_lsm_opts() selinux: fix a missing-check bug in selinux_add_mnt_opt( ) arm64: tlbflush: Ensure start/end of address range are aligned to stride usb: typec: Make sure an alt mode exist before getting its partner KVM: arm/arm64: vgic: Fix kvm_device leak in vgic_its_destroy KVM: arm64: Filter out invalid core register IDs in KVM_GET_REG_LIST KVM: arm64: Implement vq_present() as a macro xdp: check device pointer before clearing bpf: net: Set sk_bpf_storage back to NULL for cloned sk Btrfs: fix race between block group removal and block group allocation clocksource/drivers/arm_arch_timer: Don't trace count reader functions i2c: pca-platform: Fix GPIO lookup code thunderbolt: Make sure device runtime resume completes before taking domain lock drm: add fallback override/firmware EDID modes workaround i2c: acorn: fix i2c warning arm64: Don't unconditionally add -Wno-psabi to KBUILD_CFLAGS drm/edid: abstract override/firmware EDID retrieval platform/mellanox: mlxreg-hotplug: Add devm_free_irq call to remove flow platform/x86: mlx-platform: Fix parent device in i2c-mux-reg device registration platform/x86: intel-vbtn: Report switch events when event wakes device platform/x86: asus-wmi: Only Tell EC the OS will handle display hotkeys from asus_nb_wmi ARM: mvebu_v7_defconfig: fix Ethernet on Clearfog x86/resctrl: Prevent NULL pointer dereference when local MBM is disabled x86/resctrl: Don't stop walking closids when a locksetup group is found iommu/arm-smmu: Avoid constant zero in TLBI writes drm/i915/perf: fix whitelist on Gen10+ drm/i915/sdvo: Implement proper HDMI audio support for SDVO drm/i915: Fix per-pixel alpha with CCS drm/i915/dmc: protect against reading random memory drm/i915/dsi: Use a fuzzy check for burst mode clock check Input: imx_keypad - make sure keyboard can always wake up system selinux: log raw contexts as untrusted strings ptrace: restore smp_rmb() in __ptrace_may_access() IB/hfi1: Correct tid qp rcd to match verbs context IB/hfi1: Close PSM sdma_progress sleep window IB/hfi1: Validate fault injection opcode user input geneve: Don't assume linear buffers in error handler vxlan: Don't assume linear buffers in error handler net: openvswitch: do not free vport if register_netdevice() is failed. net: correct udp zerocopy refcnt also when zerocopy only on append drm/amdgpu/{uvd,vcn}: fetch ring's read_ptr after alloc ovl: fix wrong flags check in FS_IOC_FS[SG]ETXATTR ioctls riscv: Fix udelay in RV32. drm/vmwgfx: fix a warning due to missing dma_parms riscv: export pm_power_off again drm/vmwgfx: Honor the sg list segment size limitation RISC-V: defconfig: enable clocks, serial console drm/vmwgfx: Use the backdoor port if the HB port is not available bpf: lpm_trie: check left child of last leftmost node for NULL Revert "fuse: require /dev/fuse reads to have enough buffer capacity" ALSA: ice1712: Check correct return value to snd_i2c_sendbytes (EWS/DMX 6Fire) ALSA: oxfw: allow PCM capture for Stanton SCS.1m ALSA: firewire-motu: fix destruction of data for isochronous resources s390/ctl_reg: mark __ctl_set_bit and __ctl_clear_bit as __always_inline s390/boot: disable address-of-packed-member warning ANDROID: update gki aarch64 ABI representation cgroup: Fix css_task_iter_advance_css_set() cset skip condition drm/panfrost: Require the simple_ondemand governor drm/panfrost: make devfreq optional again drm/gem_shmem: Use a writecombine mapping for ->vaddr mmc: sdhi: disallow HS400 for M3-W ES1.2, RZ/G2M, and V3H ASoC: Intel: sst: fix kmalloc call with wrong flags ASoC: core: Fix deadlock in snd_soc_instantiate_card() cgroup/bfq: revert bfq.weight symlink change ARM: dts: am335x phytec boards: Fix cd-gpios active level ARM: dts: dra72x: Disable usb4_tm target module nfp: ensure skb network header is set for packet redirect tcp: fix undo spurious SYNACK in passive Fast Open mpls: fix af_mpls dependencies ibmvnic: Fix unchecked return codes of memory allocations ibmvnic: Refresh device multicast list after reset ibmvnic: Do not close unopened driver during reset mpls: fix warning with multi-label encap net: phy: rename Asix Electronics PHY driver ipv6: flowlabel: fl6_sock_lookup() must use atomic_inc_not_zero net: ipv4: fib_semantics: fix uninitialized variable Input: iqs5xx - get axis info before calling input_mt_init_slots() Linux 5.2-rc4 drm: panel-orientation-quirks: Add quirk for GPD MicroPC drm: panel-orientation-quirks: Add quirk for GPD pocket2 counter/ftm-quaddec: Add missing dependencies in Kconfig staging: iio: adt7316: Fix build errors when GPIOLIB is not set x86/fpu: Update kernel's FPU state before using for the fsave header MAINTAINERS: Karthikeyan Ramasubramanian is MIA i2c: xiic: Add max_read_len quirk ANDROID: update ABI representation gpio: pca953x: hack to fix 24 bit gpio expanders net/mlx5e: Support tagged tunnel over bond net/mlx5e: Avoid detaching non-existing netdev under switchdev mode net/mlx5e: Fix source port matching in fdb peer flow rule net/mlx5e: Replace reciprocal_scale in TX select queue function net/mlx5e: Add ndo_set_feature for uplink representor net/mlx5: Avoid reloading already removed devices net/mlx5: Update pci error handler entries and command translation RAS/CEC: Convert the timer callback to a workqueue RAS/CEC: Fix binary search function x86/mm/KASLR: Compute the size of the vmemmap section properly can: purge socket error queue on sock destruct can: flexcan: Remove unneeded registration message can: af_can: Fix error path of can_init() can: m_can: implement errata "Needless activation of MRAF irq" can: mcp251x: add support for mcp25625 dt-bindings: can: mcp251x: add mcp25625 support can: xilinx_can: use correct bittiming_const for CAN FD core can: flexcan: fix timeout when set small bitrate can: usb: Kconfig: Remove duplicate menu entry lockref: Limit number of cmpxchg loop retries uaccess: add noop untagged_addr definition x86/insn-eval: Fix use-after-free access to LDT entry kbuild: use more portable 'command -v' for cc-cross-prefix s390/unwind: correct stack switching during unwind scsi: hpsa: correct ioaccel2 chaining btrfs: Always trim all unallocated space in btrfs_trim_free_extents netfilter: ipv6: nf_defrag: accept duplicate fragments again powerpc/32s: fix booting with CONFIG_PPC_EARLY_DEBUG_BOOTX drm/meson: fix G12A primary plane disabling drm/meson: fix primary plane disabling drm/meson: fix G12A HDMI PLL settings for 4K60 1000/1001 variations block, bfq: add weight symlink to the bfq.weight cgroup parameter cgroup: let a symlink too be created with a cftype file powerpc/64s: __find_linux_pte() synchronization vs pmdp_invalidate() powerpc/64s: Fix THP PMD collapse serialisation powerpc: Fix kexec failure on book3s/32 drm/nouveau/secboot/gp10[2467]: support newer FW to fix SEC2 failures on some boards drm/nouveau/secboot: enable loading of versioned LS PMU/SEC2 ACR msgqueue FW drm/nouveau/secboot: split out FW version-specific LS function pointers drm/nouveau/secboot: pass max supported FW version to LS load funcs drm/nouveau/core: support versioned firmware loading drm/nouveau/core: pass subdev into nvkm_firmware_get, rather than device block: free sched's request pool in blk_cleanup_queue bpf: expand section tests for test_section_names bpf: more msg_name rewrite tests to test_sock_addr bpf, bpftool: enable recvmsg attach types bpf, libbpf: enable recvmsg attach types bpf: sync tooling uapi header bpf: fix unconnected udp hooks vfio/mdev: Synchronize device create/remove with parent removal vfio/mdev: Avoid creating sysfs remove file on stale device removal pktgen: do not sleep with the thread lock held. net: mvpp2: Use strscpy to handle stat strings net: rds: fix memory leak in rds_ib_flush_mr_pool ipv6: fix EFAULT on sendto with icmpv6 and hdrincl ipv6: use READ_ONCE() for inet->hdrincl as in ipv4 soundwire: intel: set dai min and max channels correctly soundwire: stream: fix bad unlock balance x86/fpu: Use fault_in_pages_writeable() for pre-faulting nvme-rdma: use dynamic dma mapping per command nvme: Fix u32 overflow in the number of namespace list calculation vfio/mdev: Improve the create/remove sequence SoC: rt274: Fix internal jack assignment in set_jack callback ALSA: hdac: fix memory release for SST and SOF drivers ASoC: SOF: Intel: hda: use the defined ppcap functions ASoC: core: move DAI pre-links initiation to snd_soc_instantiate_card ASoC: Intel: cht_bsw_rt5672: fix kernel oops with platform_name override ASoC: Intel: cht_bsw_nau8824: fix kernel oops with platform_name override ASoC: Intel: bytcht_es8316: fix kernel oops with platform_name override ASoC: Intel: cht_bsw_max98090: fix kernel oops with platform_name override Revert "gfs2: Replace gl_revokes with a GLF flag" arm64: Silence gcc warnings about arch ABI drift parisc: Fix crash due alternative coding for NP iopdir_fdc bit parisc: Use lpa instruction to load physical addresses in driver code parisc: configs: Remove useless UEVENT_HELPER_PATH parisc: Use implicit space register selection for loading the coherence index of I/O pdirs usb: gadget: udc: lpc32xx: fix return value check in lpc32xx_udc_probe() usb: gadget: dwc2: fix zlp handling usb: dwc2: Set actual frame number for completed ISOC transfer for none DDMA usb: gadget: udc: lpc32xx: allocate descriptor with GFP_ATOMIC usb: gadget: fusb300_udc: Fix memory leak of fusb300->ep[i] usb: phy: mxs: Disable external charger detect in mxs_phy_hw_init() usb: dwc2: Fix DMA cache alignment issues usb: dwc2: host: Fix wMaxPacketSize handling (fix webcam regression) ARM64: trivial: s/TIF_SECOMP/TIF_SECCOMP/ comment typo fix drm/komeda: Potential error pointer dereference drm/komeda: remove set but not used variable 'kcrtc' x86/CPU: Add more Icelake model numbers hwmon: (pmbus/core) Treat parameters as paged if on multiple pages hwmon: (pmbus/core) mutex_lock write in pmbus_set_samples hwmon: (core) add thermal sensors only if dev->of_node is present Revert "fib_rules: return 0 directly if an exactly same rule exists when NLM_F_EXCL not supplied" net: aquantia: fix wol configuration not applied sometimes ethtool: fix potential userspace buffer overflow Fix memory leak in sctp_process_init net: rds: fix memory leak when unload rds_rdma ipv6: fix the check before getting the cookie in rt6_get_cookie ipv4: not do cache for local delivery if bc_forwarding is enabled selftests: vm: Fix test build failure when built by itself tools: bpftool: Fix JSON output when lookup fails mmc: also set max_segment_size in the device mtip32xx: also set max_segment_size in the device rsxx: don't call dma_set_max_seg_size nvme-pci: don't limit DMA segement size s390/qeth: handle error when updating TX queue count s390/qeth: fix VLAN attribute in bridge_hostnotify udev event s390/qeth: check dst entry before use s390/qeth: handle limited IPv4 broadcast in L3 TX path ceph: fix error handling in ceph_get_caps() ceph: avoid iput_final() while holding mutex or in dispatch thread ceph: single workqueue for inode related works cgroup: css_task_iter_skip()'d iterators must be advanced before accessed drm/amd/amdgpu: add RLC firmware to support raven1 refresh drm/amd/powerplay: add set_power_profile_mode for raven1_refresh drm/amdgpu: fix ring test failure issue during s3 in vce 3.0 (V2) treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 450 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 449 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 448 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 446 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 445 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 444 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 443 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 442 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 440 treewide: Replace GPLv2 boilerplate/reference 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Handle Clang auto-initialization pattern block: Drop unlikely before IS_ERR(_OR_NULL) xen/swiotlb: don't initialize swiotlb twice on arm64 s390/mm: fix address space detection in exception handling HID: logitech-dj: Fix 064d:c52f receiver support Revert "HID: core: Call request_module before doing device_add" Revert "HID: core: Do not call request_module() in async context" Revert "HID: Increase maximum report size allowed by hid_field_extract()" tests: fix pidfd-test compilation signal: improve comments samples: fix pidfd-metadata compilation arm64: arch_timer: mark functions as __always_inline arm64: smp: Moved cpu_logical_map[] to smp.h arm64: cpufeature: Fix missing ZFR0 in __read_sysreg_by_encoding() selftests/bpf: move test_lirc_mode2_user to TEST_GEN_PROGS_EXTENDED USB: Fix chipmunk-like voice when using Logitech C270 for recording audio. USB: usb-storage: Add new ID to ums-realtek udmabuf: actually unmap the scatterlist net: fix indirect calls helpers for ptype list hooks. net: ipvlan: Fix ipvlan device tso disabled while NETIF_F_IP_CSUM is set scsi: smartpqi: unlock on error in pqi_submit_raid_request_synchronous() scsi: ufs: Check that space was properly alloced in copy_query_response udp: only choose unbound UDP socket for multicast when not in a VRF net/tls: replace the sleeping lock around RX resync with a bit lock Revert "net/tls: avoid NULL-deref on resync during device removal" block: aoe: no need to check return value of debugfs_create functions net: dsa: sja1105: Fix link speed not working at 100 Mbps and below net: phylink: avoid reducing support mask scripts/checkstack.pl: Fix arm64 wrong or unknown architecture kbuild: tar-pkg: enable communication with jobserver kconfig: tests: fix recursive inclusion unit test kbuild: teach kselftest-merge to find nested config files nvmet: fix data_len to 0 for bdev-backed write_zeroes MAINTAINERS: Hand over skd maintainership ASoC: sun4i-i2s: Add offset to RX channel select ASoC: sun4i-i2s: Fix sun8i tx channel offset mask ASoC: max98090: remove 24-bit format support if RJ is 0 ASoC: da7219: Fix build error without CONFIG_I2C ASoC: SOF: Intel: hda: Fix COMPILE_TEST build error drm/arm/hdlcd: Allow a bit of clock tolerance drm/arm/hdlcd: Actually validate CRTC modes drm/arm/mali-dp: Add a loop around the second set CVAL and try 5 times drm/komeda: fixing of DMA mapping sg segment warning netfilter: ipv6: nf_defrag: fix leakage of unqueued fragments habanalabs: Read upper bits of trace buffer from RWPHI arm64: arch_k3: Fix kconfig dependency warning drm: don't block fb changes for async plane updates drm/vc4: fix fb references in async update drm/msm: fix fb references in async update drm/amd: fix fb references in async update drm/rockchip: fix fb references in async update xen-blkfront: switch kcalloc to kvcalloc for large array allocation drm/mediatek: call mtk_dsi_stop() after mtk_drm_crtc_atomic_disable() drm/mediatek: clear num_pipes when unbind driver drm/mediatek: call drm_atomic_helper_shutdown() when unbinding driver drm/mediatek: unbind components in mtk_drm_unbind() drm/mediatek: fix unbind functions net: sfp: read eeprom in maximum 16 byte increments selftests: set sysctl bc_forwarding properly in router_broadcast.sh ANDROID: update gki aarch64 ABI representation net: ethernet: mediatek: Use NET_IP_ALIGN to judge if HW RX_2BYTE_OFFSET is enabled net: ethernet: mediatek: Use hw_feature to judge if HWLRO is supported net: ethernet: ti: cpsw_ethtool: fix ethtool ring param set ANDROID: gki_defconfig: Enable CMA, SLAB_FREELIST (RANDOM and HARDENED) on x86 bpf: udp: Avoid calling reuseport's bpf_prog from udp_gro bpf: udp: ipv6: Avoid running reuseport's bpf_prog from __udp6_lib_err rcu: locking and unlocking need to always be at least barriers ANDROID: gki_defconfig: enable SLAB_FREELIST_RANDOM, SLAB_FREELIST_HARDENED ANDROID: gki_defconfig: enable CMA and increase CMA_AREAS ASoC: SOF: fix DSP oops definitions in FW ABI ASoC: hda: fix unbalanced codec dev refcount for HDA_DEV_ASOC ASoC: SOF: ipc: replace fw ready bitfield with explicit bit ordering ASoC: SOF: bump to ABI 3.6 ASoC: SOF: soundwire: add initial soundwire support ASoC: SOF: uapi: mirror firmware changes ASoC: Intel: Baytrail: add quirk for Aegex 10 (RU2) tablet xfs: inode btree scrubber should calculate im_boffset correctly mmc: sdhci_am654: Fix SLOTTYPE write usb: typec: ucsi: ccg: fix memory leak in do_flash ANDROID: update gki aarch64 ABI representation habanalabs: Fix virtual address access via debugfs for 2MB pages drm/komeda: Constify the usage of komeda_component/pipeline/dev_funcs x86/power: Fix 'nosmt' vs hibernation triple fault during resume mm/vmalloc: Avoid rare case of flushing TLB with weird arguments mm/vmalloc: Fix calculation of direct map addr range PM: sleep: Add kerneldoc comments to some functions drm/i915/gvt: save RING_HEAD into vreg when vgpu switched out sparc: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD mdesc: fix a missing-check bug in get_vdev_port_node_info() drm/i915/gvt: add F_CMD_ACCESS flag for wa regs sparc64: Fix regression in non-hypervisor TLB flush xcall packet: unconditionally free po->rollover Update my email address net: hns: Fix loopback test failed at copper ports Linux 5.2-rc3 net: dsa: mv88e6xxx: avoid error message on remove from VLAN 0 mm, compaction: make sure we isolate a valid PFN include/linux/generic-radix-tree.h: fix kerneldoc comment kernel/signal.c: trace_signal_deliver when signal_group_exit drivers/iommu/intel-iommu.c: fix variable 'iommu' set but not used spdxcheck.py: fix directory structures kasan: initialize tag to 0xff in __kasan_kmalloc z3fold: fix sheduling while atomic scripts/gdb: fix invocation when CONFIG_COMMON_CLK is not set mm/gup: continue VM_FAULT_RETRY processing even for pre-faults ocfs2: fix error path kobject memory leak memcg: make it work on sparse non-0-node systems mm, memcg: consider subtrees in memory.events prctl_set_mm: downgrade mmap_sem to read lock prctl_set_mm: refactor checks from validate_prctl_map kernel/fork.c: make max_threads symbol static arch/arm/boot/compressed/decompress.c: fix build error due to lz4 changes arch/parisc/configs/c8000_defconfig: remove obsoleted CONFIG_DEBUG_SLAB_LEAK mm/vmalloc.c: fix typo in comment lib/sort.c: fix kernel-doc notation warnings mm: fix Documentation/vm/hmm.rst Sphinx warnings treewide: fix typos of SPDX-License-Identifier crypto: ux500 - fix license comment syntax error MAINTAINERS: add I2C DT bindings to ARM platforms MAINTAINERS: add DT bindings to i2c drivers mwifiex: Fix heap overflow in mwifiex_uap_parse_tail_ies() iwlwifi: mvm: change TLC config cmd sent by rs to be async iwlwifi: Fix double-free problems in iwl_req_fw_callback() iwlwifi: fix AX201 killer sku loading firmware issue iwlwifi: print fseq info upon fw assert iwlwifi: clear persistence bit according to device family iwlwifi: fix load in rfkill flow for unified firmware iwlwifi: mvm: remove d3_sram debugfs file bpf, riscv: clear high 32 bits for ALU32 add/sub/neg/lsh/rsh/arsh libbpf: Return btf_fd for load_sk_storage_btf HID: a4tech: fix horizontal scrolling HID: hyperv: Add a module description line net: dsa: sja1105: Don't store frame type in skb->cb block: print offending values when cloned rq limits are exceeded blk-mq: Document the blk_mq_hw_queue_to_node() arguments blk-mq: Fix spelling in a source code comment block: Fix bsg_setup_queue() kernel-doc header block: Fix rq_qos_wait() kernel-doc header block: Fix blk_mq_*_map_queues() kernel-doc headers block: Fix throtl_pending_timer_fn() kernel-doc header block: Convert blk_invalidate_devt() header into a non-kernel-doc header block/partitions/ldm: Convert a kernel-doc header into a non-kernel-doc header leds: avoid flush_work in atomic context cgroup: Include dying leaders with live threads in PROCS iterations cgroup: Implement css_task_iter_skip() cgroup: Call cgroup_release() before __exit_signal() netfilter: nf_tables: fix module autoload with inet family Revert "lockd: Show pid of lockd for remote locks" ALSA: hda/realtek - Update headset mode for ALC256 fs/adfs: fix filename fixup handling for "/" and "//" names fs/adfs: move append_filetype_suffix() into adfs_object_fixup() fs/adfs: remove truncated filename hashing fs/adfs: factor out filename fixup fs/adfs: factor out object fixups fs/adfs: factor out filename case lowering fs/adfs: factor out filename comparison ovl: doc: add non-standard corner cases pstore/ram: Run without kernel crash dump region MAINTAINERS: add Vasily Gorbik and Christian Borntraeger for s390 MAINTAINERS: Farewell Martin Schwidefsky pstore: Set tfm to NULL on free_buf_for_compression nds32: add new emulations for floating point instruction nds32: Avoid IEX status being incorrectly modified math-emu: Use statement expressions to fix Wshift-count-overflow warning net: correct zerocopy refcnt with udp MSG_MORE ethtool: Check for vlan etype or vlan tci when parsing flow_rule net: don't clear sock->sk early to avoid trouble in strparser net-gro: fix use-after-free read in napi_gro_frags() net: dsa: tag_8021q: Create a stable binary format net: dsa: tag_8021q: Change order of rx_vid setup net: mvpp2: fix bad MVPP2_TXQ_SCHED_TOKEN_CNTR_REG queue value docs cgroups: add another example size for hugetlb NFSv4.1: Fix bug only first CB_NOTIFY_LOCK is handled NFSv4.1: Again fix a race where CB_NOTIFY_LOCK fails to wake a waiter ipv4: tcp_input: fix stack out of bounds when parsing TCP options. mlxsw: spectrum: Prevent force of 56G mlxsw: spectrum_acl: Avoid warning after identical rules insertion SUNRPC: Fix a use after free when a server rejects the RPCSEC_GSS credential net: dsa: mv88e6xxx: fix handling of upper half of STATS_TYPE_PORT SUNRPC fix regression in umount of a secure mount r8169: fix MAC address being lost in PCI D3 treewide: Add SPDX license identifier - Kbuild treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 225 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 224 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 223 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 222 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 221 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 220 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 218 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 217 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 216 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 215 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 214 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 213 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 211 treewide: Replace GPLv2 boilerplate/reference with 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Replace GPLv2 boilerplate/reference with SPDX - rule 133 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 132 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 131 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 130 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 129 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 128 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 127 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 126 net: core: support XDP generic on stacked devices. netvsc: unshare skb in VF rx handler udp: Avoid post-GRO UDP checksum recalculation nvme-tcp: fix queue mapping when queue count is limited nvme-rdma: fix queue mapping when queue count is limited fpga: zynqmp-fpga: Correctly handle error pointer selftests: vm: install test_vmalloc.sh for run_vmtests userfaultfd: selftest: fix compiler warning kselftest/cgroup: fix incorrect test_core skip kselftest/cgroup: fix unexpected testing failure on test_core kselftest/cgroup: fix unexpected testing failure on test_memcontrol xtensa: Fix section mismatch between memblock_reserve and mem_reserve signal/ptrace: Don't leak unitialized kernel memory with PTRACE_PEEK_SIGINFO mwifiex: Abort at too short BSS descriptor element mwifiex: Fix possible buffer overflows at parsing bss descriptor drm/i915/gvt: Assign NULL to the pointer after memory free. drm/i915/gvt: Check if cur_pt_type is valid x86: intel_epb: Do not build when CONFIG_PM is unset crypto: hmac - fix memory leak in hmac_init_tfm() crypto: jitterentropy - change back to module_init() ARM: dts: Drop bogus CLKSEL for timer12 on dra7 KVM: PPC: Book3S HV: Restore SPRG3 in kvmhv_p9_guest_entry() KVM: PPC: Book3S HV: Fix lockdep warning when entering guest on POWER9 KVM: PPC: Book3S HV: XIVE: Fix page offset when clearing ESB pages KVM: PPC: Book3S HV: XIVE: Take the srcu read lock when accessing memslots KVM: PPC: Book3S HV: XIVE: Do not clear IRQ data of passthrough interrupts KVM: PPC: Book3S HV: XIVE: Introduce a new mutex for the XIVE device drm/i915/gvt: Fix cmd length of VEB_DI_IECP drm/i915/gvt: refine ggtt range validation drm/i915/gvt: Fix vGPU CSFE_CHICKEN1_REG mmio handler drm/i915/gvt: Fix GFX_MODE handling drm/i915/gvt: Update force-to-nonpriv register whitelist drm/i915/gvt: Initialize intel_gvt_gtt_entry in stack ima: show rules with IMA_INMASK correctly evm: check hash algorithm passed to init_desc() scsi: libsas: delete sas port if expander discover failed scsi: libsas: only clear phy->in_shutdown after shutdown event done scsi: scsi_dh_alua: Fix possible null-ptr-deref scsi: smartpqi: properly set both the DMA mask and the coherent DMA mask scsi: zfcp: fix to prevent port_remove with pure auto scan LUNs (only sdevs) scsi: zfcp: fix missing zfcp_port reference put on -EBUSY from port_remove scsi: libcxgbi: add a check for NULL pointer in cxgbi_check_route() net: phy: dp83867: Set up RGMII TX delay net: phy: dp83867: do not call config_init twice net: phy: dp83867: increase SGMII autoneg timer duration net: phy: dp83867: fix speed 10 in sgmii mode net: phy: marvell10g: report if the PHY fails to boot firmware net: phylink: ensure consistent phy interface mode cgroup: Use css_tryget() instead of css_tryget_online() in task_get_css() blk-mq: Fix memory leak in error handling usbip: usbip_host: fix stub_dev lock context imbalance regression net: sh_eth: fix mdio access in sh_eth_close() for R-Car Gen2 and RZ/A1 SoCs MIPS: uprobes: remove set but not used variable 'epc' s390/crypto: fix possible sleep during spinlock aquired MIPS: pistachio: Build uImage.gz by default MIPS: Make virt_addr_valid() return bool MIPS: Bounds check virt_addr_valid CIFS: cifs_read_allocate_pages: don't iterate through whole page array on ENOMEM RDMA/efa: Remove MAYEXEC flag check from mmap flow mlx5: avoid 64-bit division IB/hfi1: Validate page aligned for a given virtual address IB/{qib, hfi1, rdmavt}: Correct ibv_devinfo max_mr value IB/hfi1: Insure freeze_work work_struct is canceled on shutdown IB/rdmavt: Fix alloc_qpn() WARN_ON() ASoC: sun4i-codec: fix first delay on Speaker drm/amdgpu: reserve stollen vram for raven series media: venus: hfi_parser: fix a regression in parser selftests: bpf: fix compiler warning in flow_dissector test arm64: use the correct function type for __arm64_sys_ni_syscall arm64: use the correct function type in SYSCALL_DEFINE0 arm64: fix syscall_fn_t type block: don't protect generic_make_request_checks with blk_queue_enter block: move blk_exit_queue into __blk_release_queue selftests: bpf: complete sub-register zero extension checks selftests: bpf: move sub-register zero extension checks into subreg.c ovl: detect overlapping layers drm/i915/icl: Add WaDisableBankHangMode ALSA: fireface: Use ULL suffixes for 64-bit constants signal/arm64: Use force_sig not force_sig_fault for SIGKILL nl80211: fill all policy .type entries mac80211: free peer keys before vif down in mesh ANDROID: ABI out: Use the extension .xml rather then .out drm/mediatek: respect page offset for PRIME mmap calls drm/mediatek: adjust ddp clock control flow ALSA: hda/realtek - Improve the headset mic for Acer Aspire laptops KVM: PPC: Book3S HV: XIVE: Fix the enforced limit on the vCPU identifier KVM: PPC: Book3S HV: XIVE: Do not test the EQ flag validity when resetting KVM: PPC: Book3S HV: XIVE: Clear file mapping when device is released KVM: PPC: Book3S HV: Don't take kvm->lock around kvm_for_each_vcpu KVM: PPC: Book3S: Use new mutex to synchronize access to rtas token list KVM: PPC: Book3S HV: Use new mutex to synchronize MMU setup KVM: PPC: Book3S HV: Avoid touching arch.mmu_ready in XIVE release functions Revert "drivers: thermal: tsens: Add new operation to check if a sensor is enabled" net/mlx5e: Disable rxhash when CQE compress is enabled net/mlx5e: restrict the real_dev of vlan device is the same as uplink device net/mlx5: Allocate root ns memory using kzalloc to match kfree net/mlx5: Avoid double free in fs init error unwinding path net/mlx5: Avoid double free of root ns in the error flow path net/mlx5: Fix error handling in mlx5_load() Documentation: net-sysfs: Remove duplicate PHY device documentation llc: fix skb leak in llc_build_and_send_ui_pkt() selftests: pmtu: Fix encapsulating device in pmtu_vti6_link_change_mtu dfs_cache: fix a wrong use of kfree in flush_cache_ent() fs/cifs/smb2pdu.c: fix buffer free in SMB2_ioctl_free cifs: fix memory leak of pneg_inbuf on -EOPNOTSUPP ioctl case xenbus: Avoid deadlock during suspend due to open transactions xen/pvcalls: Remove set but not used variable tracing: Avoid memory leak in predicate_parse() habanalabs: fix bug in checking huge page optimization mmc: sdhci: Fix SDIO IRQ thread deadlock dpaa_eth: use only online CPU portals net: mvneta: Fix err code path of probe net: stmmac: Do not output error on deferred probe Btrfs: fix race updating log root item during fsync Btrfs: fix wrong ctime and mtime of a directory after log replay ARC: [plat-hsdk] Get rid of inappropriate PHY settings ARC: [plat-hsdk]: Add support of Vivante GPU ARC: [plat-hsdk]: enable creg-gpio controller Btrfs: fix fsync not persisting changed attributes of a directory btrfs: qgroup: Check bg while resuming relocation to avoid NULL pointer dereference btrfs: reloc: Also queue orphan reloc tree for cleanup to avoid BUG_ON() Btrfs: incremental send, fix emission of invalid clone operations Btrfs: incremental send, fix file corruption when no-holes feature is enabled btrfs: correct zstd workspace manager lock to use spin_lock_bh() btrfs: Ensure replaced device doesn't have pending chunk allocation ia64: fix build errors by exporting paddr_to_nid() ASoC: SOF: Intel: hda: fix the hda init chip ASoC: SOF: ipc: fix a race, leading to IPC timeouts ASoC: SOF: control: correct the copy size for bytes kcontrol put ASoC: SOF: pcm: remove warning - initialize workqueue on open ASoC: SOF: pcm: clear hw_params_upon_resume flag correctly ASoC: SOF: core: fix error handling with the probe workqueue ASoC: SOF: core: remove snd_soc_unregister_component in case of error ASoC: SOF: core: remove DSP after unregistering machine driver ASoC: soc-core: fixup references at soc_cleanup_card_resources() arm64/module: revert to unsigned interpretation of ABS16/32 relocations KVM: s390: Do not report unusabled IDs via KVM_CAP_MAX_VCPU_ID kvm: fix compile on s390 part 2 xprtrdma: Use struct_size() in kzalloc() tools headers UAPI: Sync kvm.h headers with the kernel sources perf record: Fix s390 missing module symbol and warning for non-root users perf machine: Read also the end of the kernel perf test vmlinux-kallsyms: Ignore aliases to _etext when searching on kallsyms perf session: Add missing swap ops for namespace events perf namespace: Protect reading thread's namespace tools headers UAPI: Sync drm/drm.h with the kernel s390/crypto: fix gcm-aes-s390 selftest failures s390/zcrypt: Fix wrong dispatching for control domain CPRBs s390/pci: fix assignment of bus resources s390/pci: fix struct definition for set PCI function s390: mark __cpacf_check_opcode() and cpacf_query_func() as __always_inline s390: add unreachable() to dump_fault_info() to fix -Wmaybe-uninitialized tools headers UAPI: Sync drm/i915_drm.h with the kernel tools headers UAPI: Sync linux/fs.h with the kernel tools headers UAPI: Sync linux/sched.h with the kernel tools arch x86: Sync asm/cpufeatures.h with the with the kernel tools include UAPI: Update copy of files related to new fspick, fsmount, fsconfig, fsopen, move_mount and open_tree syscalls perf arm64: Fix mksyscalltbl when system kernel headers are ahead of the kernel perf data: Fix 'strncat may truncate' build failure with recent gcc arm64: Fix the arm64_personality() syscall wrapper redirection rtw88: Make some symbols static rtw88: avoid circular locking between local->iflist_mtx and rtwdev->mutex rsi: Properly initialize data in rsi_sdio_ta_reset rtw88: fix unassigned rssi_level in rtw_sta_info rtw88: fix subscript above array bounds compiler warning fuse: extract helper for range writeback fuse: fix copy_file_range() in the writeback case mmc: meson-gx: fix irq ack mmc: tmio: fix SCC error handling to avoid false positive CRC error mmc: tegra: Fix a warning message memstick: mspro_block: Fix an error code in mspro_block_issue_req() mac80211: mesh: fix RCU warning nl80211: fix station_info pertid memory leak mac80211: Do not use stack memory with scatterlist for GMAC ALSA: line6: Assure canceling delayed work at disconnection configfs: Fix use-after-free when accessing sd->s_dentry ALSA: hda - Force polling mode on CNL for fixing codec communication i2c: synquacer: fix synquacer_i2c_doxfer() return value i2c: mlxcpld: Fix wrong initialization order in probe i2c: dev: fix potential memory leak in i2cdev_ioctl_rdwr RDMA/core: Fix panic when port_data isn't initialized RDMA/uverbs: Pass udata on uverbs error unwind RDMA/core: Clear out the udata before error unwind net: aquantia: tcp checksum 0xffff being handled incorrectly net: aquantia: fix LRO with FCS error net: aquantia: check rx csum for all packets in LRO session net: aquantia: tx clean budget logic error vhost: scsi: add weight support vhost: vsock: add weight support vhost_net: fix possible infinite loop vhost: introduce vhost_exceeds_weight() virtio: Fix indentation of VIRTIO_MMIO virtio: add unlikely() to WARN_ON_ONCE() iommu/vt-d: Set the right field for Page Walk Snoop iommu/vt-d: Fix lock inversion between iommu->lock and device_domain_lock iommu: Add missing new line for dma type drm/etnaviv: lock MMU while dumping core block: Don't revalidate bdev of hidden gendisk loop: Don't change loop device under exclusive opener drm/imx: ipuv3-plane: fix atomic update status query for non-plus i.MX6Q drm/qxl: drop WARN_ONCE() iio: temperature: mlx90632 Relax the compatibility check iio: imu: st_lsm6dsx: fix PM support for st_lsm6dsx i2c controller staging:iio:ad7150: fix threshold mode config bit fuse: add FUSE_WRITE_KILL_PRIV fuse: fallocate: fix return with locked inode PCI: PM: Avoid possible suspend-to-idle issue ACPI: PM: Call pm_set_suspend_via_firmware() during hibernation ACPI/PCI: PM: Add missing wakeup.flags.valid checks ovl: support the FS_IOC_FS[SG]ETXATTR ioctls soundwire: stream: fix out of boundary access on port properties net: tulip: de4x5: Drop redundant MODULE_DEVICE_TABLE() selftests/tls: add test for sleeping even though there is data net/tls: fix no wakeup on partial reads selftests/tls: test for lowat overshoot with multiple records net/tls: fix lowat calculation if some data came from previous record dpaa2-eth: Make constant 64-bit long dpaa2-eth: Use PTR_ERR_OR_ZERO where appropriate dpaa2-eth: Fix potential spectre issue bonding/802.3ad: fix slave link initialization transition states io_uring: Fix __io_uring_register() false success net: ethtool: Document get_rxfh_context and set_rxfh_context ethtool ops net: stmmac: dwmac-mediatek: modify csr_clk value to fix mdio read/write fail net: stmmac: fix csr_clk can't be zero issue net: stmmac: update rx tail pointer register to fix rx dma hang issue. ip_sockglue: Fix missing-check bug in ip_ra_control() ipv6_sockglue: Fix a missing-check bug in ip6_ra_control() efi: Allow the number of EFI configuration tables entries to be zero efi/x86/Add missing error handling to old_memmap 1:1 mapping code parisc: Fix compiler warnings in float emulation code parisc/slab: cleanup after /proc/slab_allocators removal bpf: sockmap, fix use after free from sleep in psock backlog workqueue net: sched: don't use tc_action->order during action dump cxgb4: Revert "cxgb4: Remove SGE_HOST_PAGE_SIZE dependency on page size" net: fec: fix the clk mismatch in failed_reset path habanalabs: Avoid using a non-initialized MMU cache mutex habanalabs: fix debugfs code uapi/habanalabs: add opcode for enable/disable device debug mode habanalabs: halt debug engines on user process close selftests: rtc: rtctest: specify timeouts selftests/harness: Allow test to configure timeout selftests/ftrace: Add checkbashisms meta-testcase selftests/ftrace: Make a script checkbashisms clean media: smsusb: better handle optional alignment test_firmware: Use correct snprintf() limit genwqe: Prevent an integer overflow in the ioctl parport: Fix mem leak in parport_register_dev_model fpga: dfl: expand minor range when registering chrdev region fpga: dfl: Add lockdep classes for pdata->lock fpga: dfl: afu: Pass the correct device to dma_mapping_error() fpga: stratix10-soc: fix use-after-free on s10_init() w1: ds2408: Fix typo after 49695ac468 (reset on output_write retry with readback) kheaders: Do not regenerate archive if config is not changed kheaders: Move from proc to sysfs drm/amd/display: Don't load DMCU for Raven 1 (v2) drm/i915: Maintain consistent documentation subsection ordering scripts/sphinx-pre-install: make it handle Sphinx versions docs: Fix conf.py for Sphinx 2.0 vt/fbcon: deinitialize resources in visual_init() after failed memory allocation xfs: fix broken log reservation debugging clocksource/drivers/timer-ti-dm: Change to new style declaration ASoC: core: lock client_mutex while removing link components ASoC: simple-card: Restore original configuration of DAI format {nl,mac}80211: allow 4addr AP operation on crypto controlled devices mac80211_hwsim: mark expected switch fall-through mac80211: fix rate reporting inside cfg80211_calculate_bitrate_he() mac80211: remove set but not used variable 'old' mac80211: handle deauthentication/disassociation from TDLS peer gpio: fix gpio-adp5588 build errors pinctrl: stmfx: Fix compile issue when CONFIG_OF_GPIO is not defined staging: kpc2000: Add dependency on MFD_CORE to kconfig symbol 'KPC2000' perf/ring-buffer: Use regular variables for nesting perf/ring-buffer: Always use {READ,WRITE}_ONCE() for rb->user_page data perf/ring_buffer: Add ordering to rb->nest increment perf/ring_buffer: Fix exposing a temporarily decreased data_head x86/CPU/AMD: Don't force the CPB cap when running under a hypervisor x86/boot: Provide KASAN compatible aliases for string routines ALSA: hda/realtek - Enable micmute LED for Huawei laptops Input: uinput - add compat ioctl number translation for UI_*_FF_UPLOAD Input: silead - add MSSL0017 to acpi_device_id cxgb4: offload VLAN flows regardless of VLAN ethtype hsr: fix don't prune the master node from the node_db net: mvpp2: cls: Fix leaked ethtool_rx_flow_rule docs: fix multiple doc build warnings in enumeration.rst lib/list_sort: fix kerneldoc build error docs: fix numaperf.rst and add it to the doc tree doc: Cope with the deprecation of AutoReporter doc: Cope with Sphinx logging deprecations bpf: sockmap, restore sk_write_space when psock gets dropped selftests: bpf: add zero extend checks for ALU32 and/or/xor bpf, riscv: clear target register high 32-bits for and/or/xor on ALU32 spi: abort spi_sync if failed to prepare_transfer_hardware ALSA: hda/realtek - Set default power save node to 0 ipv4/igmp: fix build error if !CONFIG_IP_MULTICAST powerpc/kexec: Fix loading of kernel + initramfs with kexec_file_load() MIPS: TXx9: Fix boot crash in free_initmem() MIPS: remove a space after -I to cope with header search paths for VDSO MIPS: mark ginvt() as __always_inline ipv4/igmp: fix another memory leak in igmpv3_del_delrec() bnxt_en: Device serial number is supported only for PFs. bnxt_en: Reduce memory usage when running in kdump kernel. bnxt_en: Fix possible BUG() condition when calling pci_disable_msix(). bnxt_en: Fix aggregation buffer leak under OOM condition. ipv6: Fix redirect with VRF net: stmmac: fix reset gpio free missing mISDN: make sure device name is NUL terminated net: macb: save/restore the remaining registers and features media: dvb: warning about dvb frequency limits produces too much noise net/tls: don't ignore netdev notifications if no TLS features net/tls: fix state removal with feature flags off net/tls: avoid NULL-deref on resync during device removal Documentation: add TLS offload documentation Documentation: tls: RSTify the ktls documentation Documentation: net: move device drivers docs to a submenu mISDN: Fix indenting in dsp_cmx.c ocelot: Dont allocate another multicast list, use __dev_mc_sync Validate required parameters in inet6_validate_link_af xhci: Use %zu for printing size_t type xhci: Convert xhci_handshake() to use readl_poll_timeout_atomic() xhci: Fix immediate data transfer if buffer is already DMA mapped usb: xhci: avoid null pointer deref when bos field is NULL usb: xhci: Fix a potential null pointer dereference in xhci_debugfs_create_endpoint() xhci: update bounce buffer with correct sg num media: usb: siano: Fix false-positive "uninitialized variable" warning spi: spi-fsl-spi: call spi_finalize_current_message() at the end ALSA: hda/realtek - Check headset type by unplug and resume powerpc/perf: Fix MMCRA corruption by bhrb_filter powerpc/powernv: Return for invalid IMC domain HID: logitech-hidpp: Add support for the S510 remote control HID: multitouch: handle faulty Elo touch device selftests: netfilter: add flowtable test script netfilter: nft_flow_offload: IPCB is only valid for ipv4 family netfilter: nft_flow_offload: don't offload when sequence numbers need adjustment netfilter: nft_flow_offload: set liberal tracking mode for tcp netfilter: nf_flow_table: ignore DF bit setting ASoC: Intel: sof-rt5682: fix AMP quirk support ASoC: Intel: sof-rt5682: fix for codec button mapping clk: ti: clkctrl: Fix clkdm_clk handling clk: imx: imx8mm: fix int pll clk gate clk: sifive: restrict Kconfig scope for the FU540 PRCI driver RDMA/hns: Fix PD memory leak for internal allocation netfilter: nat: fix udp checksum corruption selftests: netfilter: missing error check when setting up veth interface RDMA/srp: Rename SRP sysfs name after IB device rename trigger ipvs: Fix use-after-free in ip_vs_in ARC: [plat-hsdk]: Add missing FIFO size entry in GMAC node ARC: [plat-hsdk]: Add missing multicast filter bins number to GMAC node samples, bpf: suppress compiler warning samples, bpf: fix to change the buffer size for read() bpf: Check sk_fullsock() before returning from bpf_sk_lookup() bpf: fix out-of-bounds read in __bpf_skc_lookup Documentation/networking: fix af_xdp.rst Sphinx warnings netfilter: nft_fib: Fix existence check support netfilter: nf_queue: fix reinject verdict handling dmaengine: sprd: Add interrupt support for 2-stage transfer dmaengine: sprd: Fix the right place to configure 2-stage transfer dmaengine: sprd: Fix block length overflow dmaengine: sprd: Fix the incorrect start for 2-stage destination channels dmaengine: sprd: Add validation of current descriptor in irq handler dmaengine: sprd: Fix the possible crash when getting descriptor status tty: max310x: Fix external crystal register setup serial: sh-sci: disable DMA for uart_console serial: imx: remove log spamming error message tty: serial: msm_serial: Fix XON/XOFF USB: serial: option: add Telit 0x1260 and 0x1261 compositions USB: serial: pl2303: add Allied Telesis VT-Kit3 USB: serial: option: add support for Simcom SIM7500/SIM7600 RNDIS mode dmaengine: tegra210-adma: Fix spelling dmaengine: tegra210-adma: Fix channel FIFO configuration dmaengine: tegra210-adma: Fix crash during probe dmaengine: mediatek-cqdma: sleeping in atomic context dmaengine: dw-axi-dmac: fix null dereference when pointer first is null perf/x86/intel/ds: Fix EVENT vs. UEVENT PEBS constraints USB: rio500: update Documentation USB: rio500: simplify locking USB: rio500: fix memory leak in close after disconnect USB: rio500: refuse more than one device at a time usbip: usbip_host: fix BUG: sleeping function called from invalid context USB: sisusbvga: fix oops in error path of sisusb_probe USB: Add LPM quirk for Surface Dock GigE adapter media: usb: siano: Fix general protection fault in smsusb usb: mtu3: fix up undefined reference to usb_debug_root USB: Fix slab-out-of-bounds write in usb_get_bos_descriptor Input: elantech - enable middle button support on 2 ThinkPads dmaengine: fsl-qdma: Add improvement dmaengine: jz4780: Fix transfers being ACKed too soon gcc-plugins: Fix build failures under Darwin host MAINTAINERS: Update Stefan Wahren email address netfilter: nf_tables: fix oops during rule dump ARC: mm: SIGSEGV userspace trying to access kernel virtual memory ARC: fix build warnings ARM: dts: bcm: Add missing device_type = "memory" property soc: bcm: brcmstb: biuctrl: Register writes require a barrier soc: brcmstb: Fix error path for unsupported CPUs ARM: dts: dra71x: Disable usb4_tm target module ARM: dts: dra71x: Disable rtc target module ARM: dts: dra76x: Disable usb4_tm target module ARM: dts: dra76x: Disable rtc target module ASoC: simple-card: Fix configuration of DAI format ASoC: Intel: soc-acpi: Fix machine selection order ASoC: rt5677-spi: Handle over reading when flipping bytes ASoC: soc-dpm: fixup DAI active unbalance pinctrl: intel: Clear interrupt status in mask/unmask callback pinctrl: intel: Use GENMASK() consistently parisc: Allow building 64-bit kernel without -mlong-calls compiler option parisc: Kconfig: remove ARCH_DISCARD_MEMBLOCK staging: wilc1000: Fix some double unlock bugs in wilc_wlan_cleanup() staging: vc04_services: prevent integer overflow in create_pagelist() Staging: vc04_services: Fix a couple error codes staging: wlan-ng: fix adapter initialization failure staging: kpc2000: double unlock in error handling in kpc_dma_transfer() staging: kpc2000: Fix build error without CONFIG_UIO staging: kpc2000: fix build error on xtensa staging: erofs: set sb->s_root to NULL when failing from __getname() ARM: imx: cpuidle-imx6sx: Restrict the SW2ISO increase to i.MX6SX firmware: imx: SCU irq should ONLY be enabled after SCU IPC is ready arm64: imx: Fix build error without CONFIG_SOC_BUS ima: fix wrong signed policy requirement when not appraising x86/ima: Check EFI_RUNTIME_SERVICES before using stacktrace: Unbreak stack_trace_save_tsk_reliable() HID: wacom: Sync INTUOSP2_BT touch state after each frame if necessary HID: wacom: Correct button numbering 2nd-gen Intuos Pro over Bluetooth HID: wacom: Send BTN_TOUCH in response to INTUOSP2_BT eraser contact HID: wacom: Don't report anything prior to the tool entering range HID: wacom: Don't set tool type until we're in range ASoC: cs42xx8: Add regcache mask dirty regulator: tps6507x: Fix boot regression due to testing wrong init_data pointer ASoC: fsl_asrc: Fix the issue about unsupported rate spi: bitbang: Fix NULL pointer dereference in spi_unregister_master Input: elan_i2c - increment wakeup count if wake source wireless: Skip directory when generating certificates ASoC: ak4458: rstn_control - return a non-zero on error only ASoC: soc-pcm: BE dai needs prepare when pause release after resume ASoC: ak4458: add return value for ak4458_probe ASoC : cs4265 : readable register too low ASoC: SOF: fix error in verbose ipc command parsing ASoC: SOF: fix race in FW boot timeout handling ASoC: SOF: nocodec: fix undefined reference iio: adc: ti-ads8688: fix timestamp is not updated in buffer iio: dac: ds4422/ds4424 fix chip verification HID: rmi: Use SET_REPORT request on control endpoint for Acer Switch 3 and 5 HID: logitech-hidpp: add support for the MX5500 keyboard HID: logitech-dj: add support for the Logitech MX5500's Bluetooth Mini-Receiver HID: i2c-hid: add iBall Aer3 to descriptor override spi: Fix Raspberry Pi breakage ARM: dts: dra76x: Update MMC2_HS200_MANUAL1 iodelay values ARM: dts: am57xx-idk: Remove support for voltage switching for SD card bus: ti-sysc: Handle devices with no control registers ARM: dts: Configure osc clock for d_can on am335x iio: imu: mpu6050: Fix FIFO layout for ICM20602 lkdtm/bugs: Adjust recursion test to avoid elision lkdtm/usercopy: Moves the KERNEL_DS test to non-canonical iio: adc: ads124: avoid buffer overflow iio: adc: modify NPCM ADC read reference voltage Change-Id: I98c823993370027391cc21dfb239c3049f025136 Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>	2019-07-01 17:41:24 -07:00
Linus Torvalds	f72dae2089	Merge tag 'selinux-pr-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux ... Pull selinux updates from Paul Moore: "We've got a few SELinux patches for the v5.2 merge window, the highlights are below: - Add LSM hooks, and the SELinux implementation, for proper labeling of kernfs. While we are only including the SELinux implementation here, the rest of the LSM folks have given the hooks a thumbs-up. - Update the SELinux mdp (Make Dummy Policy) script to actually work on a modern system. - Disallow userspace to change the LSM credentials via /proc/self/attr when the task's credentials are already overridden. The change was made in procfs because all the LSM folks agreed this was the Right Thing To Do and duplicating it across each LSM was going to be annoying" * tag 'selinux-pr-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux: proc: prevent changes to overridden credentials selinux: Check address length before reading address family kernfs: fix xattr name handling in LSM helpers MAINTAINERS: update SELinux file patterns selinux: avoid uninitialized variable warning selinux: remove useless assignments LSM: lsm_hooks.h - fix missing colon in docstring selinux: Make selinux_kernfs_init_security static kernfs: initialize security of newly created nodes selinux: implement the kernfs_init_security hook LSM: add new hook for kernfs node initialization kernfs: use simple_xattrs for security attributes selinux: try security xattr after genfs for kernfs filesystems kernfs: do not alloc iattrs in kernfs_xattr_get kernfs: clean up struct kernfs_iattrs scripts/selinux: fix build selinux: use kernel linux/socket.h for genheaders and mdp scripts/selinux: modernize mdp	2019-05-07 18:48:09 -07:00
Christina Quast	0d1a393d61	fs: kernfs: Corrected spelling mistake ... flies => files Signed-off-by: Christina Quast <cquast@hanoverdisplays.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2019-04-25 21:41:35 +02:00
Ondrej Mosnacek	1537ad15c9	kernfs: fix xattr name handling in LSM helpers ... The implementation of kernfs_security_xattr_*() helpers reuses the kernfs_node_xattr_*() functions, which take the suffix of the xattr name and extract full xattr name from it using xattr_full_name(). However, this function relies on the fact that the suffix passed to xattr handlers from VFS is always constructed from the full name by just incerementing the pointer. This doesn't necessarily hold for the callers of kernfs_security_xattr_*(), so their usage will easily lead to out-of-bounds access. Fix this by moving the xattr name reconstruction to the VFS xattr handlers and replacing the kernfs_security_xattr_*() helpers with more general kernfs_xattr_*() helpers that take full xattr name and allow accessing all kernfs node's xattrs. Reported-by: kernel test robot <rong.a.chen@intel.com> Fixes: b230d5aba2 ("LSM: add new hook for kernfs node initialization") Fixes: ec882da5cd ("selinux: implement the kernfs_init_security hook") Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Paul Moore <paul@paul-moore.com>	2019-04-04 09:00:27 -04:00
Ondrej Mosnacek	b230d5aba2	LSM: add new hook for kernfs node initialization ... This patch introduces a new security hook that is intended for initializing the security data for newly created kernfs nodes, which provide a way of storing a non-default security context, but need to operate independently from mounts (and therefore may not have an associated inode at the moment of creation). The main motivation is to allow kernfs nodes to inherit the context of the parent under SELinux, similar to the behavior of security_inode_init_security(). Other LSMs may implement their own logic for handling the creation of new nodes. This patch also adds helper functions to <linux/kernfs.h> for getting/setting security xattrs of a kernfs node so that LSMs hooks are able to do their job. Other important attributes should be accessible direcly in the kernfs_node fields (in case there is need for more, then new helpers should be added to kernfs.h along with the patch that needs them). Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Acked-by: Casey Schaufler <casey@schaufler-ca.com> [PM: more manual merge fixes] Signed-off-by: Paul Moore <paul@paul-moore.com>	2019-03-20 22:01:02 -04:00
Linus Torvalds	7b47a9e7c8	Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs ... Pull vfs mount infrastructure updates from Al Viro: "The rest of core infrastructure; no new syscalls in that pile, but the old parts are switched to new infrastructure. At that point conversions of individual filesystems can happen independently; some are done here (afs, cgroup, procfs, etc.), there's also a large series outside of that pile dealing with NFS (quite a bit of option-parsing stuff is getting used there - it's one of the most convoluted filesystems in terms of mount-related logics), but NFS bits are the next cycle fodder. It got seriously simplified since the last cycle; documentation is probably the weakest bit at the moment - I considered dropping the commit introducing Documentation/filesystems/mount_api.txt (cutting the size increase by quarter ;-), but decided that it would be better to fix it up after -rc1 instead. That pile allows to do followup work in independent branches, which should make life much easier for the next cycle. fs/super.c size increase is unpleasant; there's a followup series that allows to shrink it considerably, but I decided to leave that until the next cycle" * 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (41 commits) afs: Use fs_context to pass parameters over automount afs: Add fs_context support vfs: Add some logging to the core users of the fs_context log vfs: Implement logging through fs_context vfs: Provide documentation for new mount API vfs: Remove kern_mount_data() hugetlbfs: Convert to fs_context cpuset: Use fs_context kernfs, sysfs, cgroup, intel_rdt: Support fs_context cgroup: store a reference to cgroup_ns into cgroup_fs_context cgroup1_get_tree(): separate "get cgroup_root to use" into a separate helper cgroup_do_mount(): massage calling conventions cgroup: stash cgroup_root reference into cgroup_fs_context cgroup2: switch to option-by-option parsing cgroup1: switch to option-by-option parsing cgroup: take options parsing into ->parse_monolithic() cgroup: fold cgroup1_mount() into cgroup1_get_tree() cgroup: start switching to fs_context ipc: Convert mqueue fs to fs_context proc: Add fs_context support to procfs ...	2019-03-12 14:08:19 -07:00
Johannes Weiner	147e1a97c4	fs: kernfs: add poll file operation ... Patch series "psi: pressure stall monitors", v3. Android is adopting psi to detect and remedy memory pressure that results in stuttering and decreased responsiveness on mobile devices. Psi gives us the stall information, but because we're dealing with latencies in the millisecond range, periodically reading the pressure files to detect stalls in a timely fashion is not feasible. Psi also doesn't aggregate its averages at a high enough frequency right now. This patch series extends the psi interface such that users can configure sensitive latency thresholds and use poll() and friends to be notified when these are breached. As high-frequency aggregation is costly, it implements an aggregation method that is optimized for fast, short-interval averaging, and makes the aggregation frequency adaptive, such that high-frequency updates only happen while monitored stall events are actively occurring. With these patches applied, Android can monitor for, and ward off, mounting memory shortages before they cause problems for the user. For example, using memory stall monitors in userspace low memory killer daemon (lmkd) we can detect mounting pressure and kill less important processes before device becomes visibly sluggish. In our memory stress testing psi memory monitors produce roughly 10x less false positives compared to vmpressure signals. Having ability to specify multiple triggers for the same psi metric allows other parts of Android framework to monitor memory state of the device and act accordingly. The new interface is straightforward. The user opens one of the pressure files for writing and writes a trigger description into the file descriptor that defines the stall state - some or full, and the maximum stall time over a given window of time. E.g.: /* Signal when stall time exceeds 100ms of a 1s window */ char trigger[] = "full 100000 1000000"; fd = open("/proc/pressure/memory"); write(fd, trigger, sizeof(trigger)); while (poll() >= 0) { ... } close(fd); When the monitored stall state is entered, psi adapts its aggregation frequency according to what the configured time window requires in order to emit event signals in a timely fashion. Once the stalling subsides, aggregation reverts back to normal. The trigger is associated with the open file descriptor. To stop monitoring, the user only needs to close the file descriptor and the trigger is discarded. Patches 1-4 prepare the psi code for polling support. Patch 5 implements the adaptive polling logic, the pressure growth detection optimized for short intervals, and hooks up write() and poll() on the pressure files. The patches were developed in collaboration with Johannes Weiner. This patch (of 5): Kernfs has a standardized poll/notification mechanism for waking all pollers on all fds when a filesystem node changes. To allow polling for custom events, add a .poll callback that can override the default. This is in preparation for pollable cgroup pressure files which have per-fd trigger configurations. Link: http://lkml.kernel.org/r/20190124211518.244221-2-surenb@google.com Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Cc: Dennis Zhou <dennis@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Li Zefan <lizefan@huawei.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2019-03-05 21:07:17 -08:00
David Howells	23bf1b6be9	kernfs, sysfs, cgroup, intel_rdt: Support fs_context ... Make kernfs support superblock creation/mount/remount with fs_context. This requires that sysfs, cgroup and intel_rdt, which are built on kernfs, be made to support fs_context also. Notes: (1) A kernfs_fs_context struct is created to wrap fs_context and the kernfs mount parameters are moved in here (or are in fs_context). (2) kernfs_mount{,_ns}() are made into kernfs_get_tree(). The extra namespace tag parameter is passed in the context if desired (3) kernfs_free_fs_context() is provided as a destructor for the kernfs_fs_context struct, but for the moment it does nothing except get called in the right places. (4) sysfs doesn't wrap kernfs_fs_context since it has no parameters to pass, but possibly this should be done anyway in case someone wants to add a parameter in future. (5) A cgroup_fs_context struct is created to wrap kernfs_fs_context and the cgroup v1 and v2 mount parameters are all moved there. (6) cgroup1 parameter parsing error messages are now handled by invalf(), which allows userspace to collect them directly. (7) cgroup1 parameter cleanup is now done in the context destructor rather than in the mount/get_tree and remount functions. Weirdies: (*) cgroup_do_get_tree() calls cset_cgroup_from_root() with locks held, but then uses the resulting pointer after dropping the locks. I'm told this is okay and needs commenting. (*) The cgroup refcount web. This really needs documenting. (*) cgroup2 only has one root? Add a suggestion from Thomas Gleixner in which the RDT enablement code is placed into its own function. [folded a leak fix from Andrey Vagin] Signed-off-by: David Howells <dhowells@redhat.com> cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: Tejun Heo <tj@kernel.org> cc: Li Zefan <lizefan@huawei.com> cc: Johannes Weiner <hannes@cmpxchg.org> cc: cgroups@vger.kernel.org cc: fenghua.yu@intel.com Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>	2019-02-28 03:29:34 -05:00
Al Viro	6d7fbce7da	kill kernfs_pin_sb() ... unused now and impossible to use safely anyway. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>	2019-01-17 12:02:57 -05:00
Konstantin Khlebnikov	8f5be0ec23	kernfs: update comment about kernfs_path() return value ... Now it returns the length of the full path or error code. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Fixes: 3abb1d90f5 ("kernfs: make kernfs_path*() behave in the style of strlcpy()") Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2018-09-16 22:37:16 +02:00
Dmitry Torokhov	488dee96bb	kernfs: allow creating kernfs objects with arbitrary uid/gid ... This change allows creating kernfs files and directories with arbitrary uid/gid instead of always using GLOBAL_ROOT_UID/GID by extending kernfs_create_dir_ns() and kernfs_create_file_ns() with uid/gid arguments. The "simple" kernfs_create_file() and kernfs_create_dir() are left alone and always create objects belonging to the global root. When creating symlinks ownership (uid/gid) is taken from the target kernfs object. Co-Developed-by: Tyler Hicks <tyhicks@canonical.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>	2018-07-20 23:44:35 -07:00
Shaohua Li	69fd5c3917	blktrace: add an option to allow displaying cgroup path ... By default we output cgroup id in blktrace. This adds an option to display cgroup path. Since get cgroup path is a relativly heavy operation, we don't enable it by default. with the option enabled, blktrace will output something like this: dd-1353 [007] d..2 293.015252: 8,0 /test/level D R 24 + 8 [dd] Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>	2017-07-29 09:00:03 -06:00
Shaohua Li	aa81882534	kernfs: add exportfs operations ... Now we have the facilities to implement exportfs operations. The idea is cgroup can export the fhandle info to userspace, then userspace uses fhandle to find the cgroup name. Another example is userspace can get fhandle for a cgroup and BPF uses the fhandle to filter info for the cgroup. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>	2017-07-29 09:00:03 -06:00
Shaohua Li	c53cd490b1	kernfs: introduce kernfs_node_id ... inode number and generation can identify a kernfs node. We are going to export the identification by exportfs operations, so put ino and generation into a separate structure. It's convenient when later patches use the identification. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>	2017-07-29 09:00:03 -06:00
Shaohua Li	4a3ef68aca	kernfs: implement i_generation ... Set i_generation for kernfs inode. This is required to implement exportfs operations. The generation is 32-bit, so it's possible the generation wraps up and we find stale files. To reduce the posssibility, we don't reuse inode numer immediately. When the inode number allocation wraps, we increase generation number. In this way generation/inode number consist of a 64-bit number which is unlikely duplicated. This does make the idr tree more sparse and waste some memory. Since idr manages 32-bit keys, idr uses a 6-level radix tree, each level covers 6 bits of the key. In a 100k inode kernfs, the worst case will have around 300k radix tree node. Each node is 576bytes, so the tree will use about ~150M memory. Sounds not too bad, if this really is a problem, we should find better data structure. Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>	2017-07-29 09:00:03 -06:00
Shaohua Li	7d35079f82	kernfs: use idr instead of ida to manage inode number ... kernfs uses ida to manage inode number. The problem is we can't get kernfs_node from inode number with ida. Switching to use idr, next patch will add an API to get kernfs_node from inode number. Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>	2017-07-29 09:00:03 -06:00
Tejun Heo	0e67db2f9f	kernfs: add kernfs_ops->open/release() callbacks ... Add ->open/release() methods to kernfs_ops. ->open() is called when the file is opened and ->release() when the file is either released or severed. These callbacks can be used, for example, to manage persistent caching objects over multiple seq_file iterations. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Acked-by: Zefan Li <lizefan@huawei.com>	2016-12-27 14:49:03 -05:00
Tejun Heo	a1d82aff5d	kernfs: make kernfs_open_file->mmapped a bitfield ... More kernfs_open_file->mutex synchronized flags are planned to be added. Convert ->mmapped to a bitfield in preparation. While at it, make kernfs_fop_mmap() use "true" instead of "1" on ->mmapped. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Acked-by: Zefan Li <lizefan@huawei.com>	2016-12-27 14:49:02 -05:00
Tejun Heo	bb09c8634b	kernfs: remove kernfs_path_len() ... It doesn't have any in-kernel user and the same result can be obtained from kernfs_path(@kn, NULL, 0). Remove it. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Serge Hallyn <serge.hallyn@ubuntu.com>	2016-08-10 11:23:44 -04:00
Tejun Heo	3abb1d90f5	kernfs: make kernfs_path*() behave in the style of strlcpy() ... kernfs_path*() functions always return the length of the full path but the path content is undefined if the length is larger than the provided buffer. This makes its behavior different from strlcpy() and requires error handling in all its users even when they don't care about truncation. In addition, the implementation can actully be simplified by making it behave properly in strlcpy() style. * Update kernfs_path_from_node_locked() to always fill up the buffer with path. If the buffer is not large enough, the output is truncated and terminated. * kernfs_path() no longer needs error handling. Make it a simple inline wrapper around kernfs_path_from_node(). * sysfs_warn_dup()'s use of kernfs_path() doesn't need error handling. Updated accordingly. * cgroup_path()'s use of kernfs_path() updated to retain the old behavior. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>	2016-08-10 11:23:44 -04:00
Tejun Heo	0e0b2afdf6	kernfs: add dummy implementation of kernfs_path_from_node() ... The dummy version of kernfs_path_from_node() was missing. This currently doesn't break anything. Let's add it for consistency and to ease adding wrappers around it. v2: Removed stray ';' which was causing build failures. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2016-08-10 11:23:43 -04:00
Linus Torvalds	3aa2fc1667	Merge tag 'driver-core-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core ... Pull driver core updates from Greg KH: "Here's the "big" driver core update for 4.7-rc1. Mostly just debugfs changes, the long-known and messy races with removing debugfs files should be fixed thanks to the great work of Nicolai Stange. We also have some isa updates in here (the x86 maintainers told me to take it through this tree), a new warning when we run out of dynamic char major numbers, and a few other assorted changes, details in the shortlog. All have been in linux-next for some time with no reported issues" * tag 'driver-core-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits) Revert "base: dd: don't remove driver_data in -EPROBE_DEFER case" gpio: ws16c48: Utilize the ISA bus driver gpio: 104-idio-16: Utilize the ISA bus driver gpio: 104-idi-48: Utilize the ISA bus driver gpio: 104-dio-48e: Utilize the ISA bus driver watchdog: ebc-c384_wdt: Utilize the ISA bus driver iio: stx104: Utilize the module_isa_driver and max_num_isa_dev macros iio: stx104: Add X86 dependency to STX104 Kconfig option Documentation: Add ISA bus driver documentation isa: Implement the max_num_isa_dev macro isa: Implement the module_isa_driver macro pnp: pnpbios: Add explicit X86_32 dependency to PNPBIOS isa: Decouple X86_32 dependency from the ISA Kconfig option driver-core: use 'dev' argument in dev_dbg_ratelimited stub base: dd: don't remove driver_data in -EPROBE_DEFER case kernfs: Move faulting copy_user operations outside of the mutex devcoredump: add scatterlist support debugfs: unproxify files created through debugfs_create_u32_array() debugfs: unproxify files created through debugfs_create_blob() debugfs: unproxify files created through debugfs_create_bool() ...	2016-05-20 21:26:15 -07:00
Serge E. Hallyn	4f41fc5962	cgroup, kernfs: make mountinfo show properly scoped path for cgroup namespaces ... Patch summary: When showing a cgroupfs entry in mountinfo, show the path of the mount root dentry relative to the reader's cgroup namespace root. Short explanation (courtesy of mkerrisk): If we create a new cgroup namespace, then we want both /proc/self/cgroup and /proc/self/mountinfo to show cgroup paths that are correctly virtualized with respect to the cgroup mount point. Previous to this patch, /proc/self/cgroup shows the right info, but /proc/self/mountinfo does not. Long version: When a uid 0 task which is in freezer cgroup /a/b, unshares a new cgroup namespace, and then mounts a new instance of the freezer cgroup, the new mount will be rooted at /a/b. The root dentry field of the mountinfo entry will show '/a/b'. cat > /tmp/do1 << EOF mount -t cgroup -o freezer freezer /mnt grep freezer /proc/self/mountinfo EOF unshare -Gm bash /tmp/do1 > 330 160 0:34 / /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime - cgroup cgroup rw,freezer > 355 133 0:34 /a/b /mnt rw,relatime - cgroup freezer rw,freezer The task's freezer cgroup entry in /proc/self/cgroup will simply show '/': grep freezer /proc/self/cgroup 9:freezer:/ If instead the same task simply bind mounts the /a/b cgroup directory, the resulting mountinfo entry will again show /a/b for the dentry root. However in this case the task will find its own cgroup at /mnt/a/b, not at /mnt: mount --bind /sys/fs/cgroup/freezer/a/b /mnt 130 25 0:34 /a/b /mnt rw,nosuid,nodev,noexec,relatime shared:21 - cgroup cgroup rw,freezer In other words, there is no way for the task to know, based on what is in mountinfo, which cgroup directory is its own. Example (by mkerrisk): First, a little script to save some typing and verbiage: echo -e "\t/proc/self/cgroup:\t$(cat /proc/self/cgroup | grep freezer)" cat /proc/self/mountinfo | grep freezer | awk '{print "\tmountinfo:\t\t" $4 "\t" $5}' Create cgroup, place this shell into the cgroup, and look at the state of the /proc files: 2653 2653 # Our shell 14254 # cat(1) /proc/self/cgroup: 10:freezer:/a/b mountinfo: / /sys/fs/cgroup/freezer Create a shell in new cgroup and mount namespaces. The act of creating a new cgroup namespace causes the process's current cgroups directories to become its cgroup root directories. (Here, I'm using my own version of the "unshare" utility, which takes the same options as the util-linux version): Look at the state of the /proc files: /proc/self/cgroup: 10:freezer:/ mountinfo: / /sys/fs/cgroup/freezer The third entry in /proc/self/cgroup (the pathname of the cgroup inside the hierarchy) is correctly virtualized w.r.t. the cgroup namespace, which is rooted at /a/b in the outer namespace. However, the info in /proc/self/mountinfo is not for this cgroup namespace, since we are seeing a duplicate of the mount from the old mount namespace, and the info there does not correspond to the new cgroup namespace. However, trying to create a new mount still doesn't show us the right information in mountinfo: # propagating to other mountns /proc/self/cgroup: 7:freezer:/ mountinfo: /a/b /mnt/freezer The act of creating a new cgroup namespace caused the process's current freezer directory, "/a/b", to become its cgroup freezer root directory. In other words, the pathname directory of the directory within the newly mounted cgroup filesystem should be "/", but mountinfo wrongly shows us "/a/b". The consequence of this is that the process in the cgroup namespace cannot correctly construct the pathname of its cgroup root directory from the information in /proc/PID/mountinfo. With this patch, the dentry root field in mountinfo is shown relative to the reader's cgroup namespace. So the same steps as above: /proc/self/cgroup: 10:freezer:/a/b mountinfo: / /sys/fs/cgroup/freezer /proc/self/cgroup: 10:freezer:/ mountinfo: /../.. /sys/fs/cgroup/freezer /proc/self/cgroup: 10:freezer:/ mountinfo: / /mnt/freezer cgroup.clone_children freezer.parent_freezing freezer.state tasks cgroup.procs freezer.self_freezing notify_on_release 3164 2653 # First shell that placed in this cgroup 3164 # Shell started by 'unshare' 14197 # cat(1) Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com> Tested-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>	2016-05-09 12:15:03 -04:00
Chris Wilson	e4234a1fc3	kernfs: Move faulting copy_user operations outside of the mutex ... A fault in a user provided buffer may lead anywhere, and lockdep warns that we have a potential deadlock between the mm->mmap_sem and the kernfs file mutex: [ 82.811702] ====================================================== [ 82.811705] [ INFO: possible circular locking dependency detected ] [ 82.811709] 4.5.0-rc4-gfxbench+ #1 Not tainted [ 82.811711] ------------------------------------------------------- [ 82.811714] kms_setmode/5859 is trying to acquire lock: [ 82.811717] (&dev->struct_mutex){+.+.+.}, at: [<ffffffff8150d9c1>] drm_gem_mmap+0x1a1/0x270 [ 82.811731] but task is already holding lock: [ 82.811734] (&mm->mmap_sem){++++++}, at: [<ffffffff8117b364>] vm_mmap_pgoff+0x44/0xa0 [ 82.811745] which lock already depends on the new lock. [ 82.811749] the existing dependency chain (in reverse order) is: [ 82.811752] -> #3 (&mm->mmap_sem){++++++}: [ 82.811761] [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0 [ 82.811766] [<ffffffff8118bc65>] __might_fault+0x75/0xa0 [ 82.811771] [<ffffffff8124da4a>] kernfs_fop_write+0x8a/0x180 [ 82.811787] [<ffffffff811d1023>] __vfs_write+0x23/0xe0 [ 82.811792] [<ffffffff811d1d74>] vfs_write+0xa4/0x190 [ 82.811797] [<ffffffff811d2c14>] SyS_write+0x44/0xb0 [ 82.811801] [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73 [ 82.811807] -> #2 (s_active#6){++++.+}: [ 82.811814] [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0 [ 82.811819] [<ffffffff8124c070>] __kernfs_remove+0x210/0x2f0 [ 82.811823] [<ffffffff8124d040>] kernfs_remove_by_name_ns+0x40/0xa0 [ 82.811828] [<ffffffff8124e9e0>] sysfs_remove_file_ns+0x10/0x20 [ 82.811832] [<ffffffff815318d4>] device_del+0x124/0x250 [ 82.811837] [<ffffffff81531a19>] device_unregister+0x19/0x60 [ 82.811841] [<ffffffff8153c051>] cpu_cache_sysfs_exit+0x51/0xb0 [ 82.811846] [<ffffffff8153c628>] cacheinfo_cpu_callback+0x38/0x70 [ 82.811851] [<ffffffff8109ae89>] notifier_call_chain+0x39/0xa0 [ 82.811856] [<ffffffff8109aef9>] __raw_notifier_call_chain+0x9/0x10 [ 82.811860] [<ffffffff810786de>] cpu_notify+0x1e/0x40 [ 82.811865] [<ffffffff81078779>] cpu_notify_nofail+0x9/0x20 [ 82.811869] [<ffffffff81078ac3>] _cpu_down+0x233/0x340 [ 82.811874] [<ffffffff81079019>] disable_nonboot_cpus+0xc9/0x350 [ 82.811878] [<ffffffff810d2e11>] suspend_devices_and_enter+0x5a1/0xb50 [ 82.811883] [<ffffffff810d3903>] pm_suspend+0x543/0x8d0 [ 82.811888] [<ffffffff810d1b77>] state_store+0x77/0xe0 [ 82.811892] [<ffffffff813fa68f>] kobj_attr_store+0xf/0x20 [ 82.811897] [<ffffffff8124e740>] sysfs_kf_write+0x40/0x50 [ 82.811902] [<ffffffff8124dafc>] kernfs_fop_write+0x13c/0x180 [ 82.811906] [<ffffffff811d1023>] __vfs_write+0x23/0xe0 [ 82.811910] [<ffffffff811d1d74>] vfs_write+0xa4/0x190 [ 82.811914] [<ffffffff811d2c14>] SyS_write+0x44/0xb0 [ 82.811918] [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73 [ 82.811923] -> #1 (cpu_hotplug.lock){+.+.+.}: [ 82.811929] [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0 [ 82.811933] [<ffffffff817b6f72>] mutex_lock_nested+0x62/0x3b0 [ 82.811940] [<ffffffff810784c1>] get_online_cpus+0x61/0x80 [ 82.811944] [<ffffffff811170eb>] stop_machine+0x1b/0xe0 [ 82.811949] [<ffffffffa0178edd>] gen8_ggtt_insert_entries__BKL+0x2d/0x30 [i915] [ 82.812009] [<ffffffffa017d3a6>] ggtt_bind_vma+0x46/0x70 [i915] [ 82.812045] [<ffffffffa017eb70>] i915_vma_bind+0x140/0x290 [i915] [ 82.812081] [<ffffffffa01862b9>] i915_gem_object_do_pin+0x899/0xb00 [i915] [ 82.812117] [<ffffffffa0186555>] i915_gem_object_pin+0x35/0x40 [i915] [ 82.812154] [<ffffffffa019a23e>] intel_init_pipe_control+0xbe/0x210 [i915] [ 82.812192] [<ffffffffa0197312>] intel_logical_rings_init+0xe2/0xde0 [i915] [ 82.812232] [<ffffffffa0186fe3>] i915_gem_init+0xf3/0x130 [i915] [ 82.812278] [<ffffffffa02097ed>] i915_driver_load+0xf2d/0x1770 [i915] [ 82.812318] [<ffffffff81512474>] drm_dev_register+0xa4/0xb0 [ 82.812323] [<ffffffff8151467e>] drm_get_pci_dev+0xce/0x1e0 [ 82.812328] [<ffffffffa01472cf>] i915_pci_probe+0x2f/0x50 [i915] [ 82.812360] [<ffffffff8143f907>] pci_device_probe+0x87/0xf0 [ 82.812366] [<ffffffff81535f89>] driver_probe_device+0x229/0x450 [ 82.812371] [<ffffffff81536233>] __driver_attach+0x83/0x90 [ 82.812375] [<ffffffff81533c61>] bus_for_each_dev+0x61/0xa0 [ 82.812380] [<ffffffff81535879>] driver_attach+0x19/0x20 [ 82.812384] [<ffffffff8153535f>] bus_add_driver+0x1ef/0x290 [ 82.812388] [<ffffffff81536e9b>] driver_register+0x5b/0xe0 [ 82.812393] [<ffffffff8143e83b>] __pci_register_driver+0x5b/0x60 [ 82.812398] [<ffffffff81514866>] drm_pci_init+0xd6/0x100 [ 82.812402] [<ffffffffa027c094>] 0xffffffffa027c094 [ 82.812406] [<ffffffff810003de>] do_one_initcall+0xae/0x1d0 [ 82.812412] [<ffffffff811595a0>] do_init_module+0x5b/0x1cb [ 82.812417] [<ffffffff81106160>] load_module+0x1c20/0x2480 [ 82.812422] [<ffffffff81106bae>] SyS_finit_module+0x7e/0xa0 [ 82.812428] [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73 [ 82.812433] -> #0 (&dev->struct_mutex){+.+.+.}: [ 82.812439] [<ffffffff810cbe59>] __lock_acquire+0x1fc9/0x20f0 [ 82.812443] [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0 [ 82.812456] [<ffffffff8150d9e7>] drm_gem_mmap+0x1c7/0x270 [ 82.812460] [<ffffffff81196a14>] mmap_region+0x334/0x580 [ 82.812466] [<ffffffff81196fc4>] do_mmap+0x364/0x410 [ 82.812470] [<ffffffff8117b38d>] vm_mmap_pgoff+0x6d/0xa0 [ 82.812474] [<ffffffff811950f4>] SyS_mmap_pgoff+0x184/0x220 [ 82.812479] [<ffffffff8100a0fd>] SyS_mmap+0x1d/0x20 [ 82.812484] [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73 [ 82.812489] other info that might help us debug this: [ 82.812493] Chain exists of: &dev->struct_mutex --> s_active#6 --> &mm->mmap_sem [ 82.812502] Possible unsafe locking scenario: [ 82.812506] CPU0 CPU1 [ 82.812508] ---- ---- [ 82.812510] lock(&mm->mmap_sem); [ 82.812514] lock(s_active#6); [ 82.812519] lock(&mm->mmap_sem); [ 82.812522] lock(&dev->struct_mutex); [ 82.812526] *** DEADLOCK *** [ 82.812531] 1 lock held by kms_setmode/5859: [ 82.812533] #0: (&mm->mmap_sem){++++++}, at: [<ffffffff8117b364>] vm_mmap_pgoff+0x44/0xa0 [ 82.812541] stack backtrace: [ 82.812547] CPU: 0 PID: 5859 Comm: kms_setmode Not tainted 4.5.0-rc4-gfxbench+ #1 [ 82.812550] Hardware name: /NUC5CPYB, BIOS PYBSWCEL.86A.0040.2015.0814.1353 08/14/2015 [ 82.812553] 0000000000000000 ffff880079407bf0 ffffffff813f8505 ffffffff825fb270 [ 82.812560] ffffffff825c4190 ffff880079407c30 ffffffff810c84ac ffff880079407c90 [ 82.812566] ffff8800797ed328 ffff8800797ecb00 0000000000000001 ffff8800797ed350 [ 82.812573] Call Trace: [ 82.812578] [<ffffffff813f8505>] dump_stack+0x67/0x92 [ 82.812582] [<ffffffff810c84ac>] print_circular_bug+0x1fc/0x310 [ 82.812586] [<ffffffff810cbe59>] __lock_acquire+0x1fc9/0x20f0 [ 82.812590] [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0 [ 82.812594] [<ffffffff8150d9c1>] ? drm_gem_mmap+0x1a1/0x270 [ 82.812599] [<ffffffff8150d9e7>] drm_gem_mmap+0x1c7/0x270 [ 82.812603] [<ffffffff8150d9c1>] ? drm_gem_mmap+0x1a1/0x270 [ 82.812608] [<ffffffff81196a14>] mmap_region+0x334/0x580 [ 82.812612] [<ffffffff81196fc4>] do_mmap+0x364/0x410 [ 82.812616] [<ffffffff8117b38d>] vm_mmap_pgoff+0x6d/0xa0 [ 82.812629] [<ffffffff811950f4>] SyS_mmap_pgoff+0x184/0x220 [ 82.812633] [<ffffffff8100a0fd>] SyS_mmap+0x1d/0x20 [ 82.812637] [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73 Highly unlikely though this scenario is, we can avoid the issue entirely by moving the copy operation from out under the kernfs_get_active() tracking by assigning the preallocated buffer its own mutex. The temporary buffer allocation doesn't require mutex locking as it is entirely local. The locked section was extended by the addition of the preallocated buf to speed up md user operations in commit 2b75869bba Author: NeilBrown <neilb@suse.de> Date: Mon Oct 13 16:41:28 2014 +1100 sysfs/kernfs: allow attributes to request write buffer be pre-allocated. Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94350 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: NeilBrown <neilb@suse.de> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2016-04-30 10:05:05 -07:00
Aditya Kali	fb3c831565	kernfs: define kernfs_node_dentry ... Add a new kernfs api is added to lookup the dentry for a particular kernfs path. Signed-off-by: Aditya Kali <adityakali@google.com> Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Tejun Heo <tj@kernel.org>	2016-02-16 13:04:58 -05:00
Aditya Kali	9f6df573a4	kernfs: Add API to generate relative kernfs path ... The new function kernfs_path_from_node() generates and returns kernfs path of a given kernfs_node relative to a given parent kernfs_node. Signed-off-by: Aditya Kali <adityakali@google.com> Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Tejun Heo <tj@kernel.org>	2016-02-16 13:04:58 -05:00
Tejun Heo	bd96f76a24	kernfs: implement kernfs_walk_and_get() ... Implement kernfs_walk_and_get() which is similar to kernfs_find_and_get() but can walk a path instead of just a name. v2: Use strlcpy() instead of strlen() + memcpy() as suggested by David. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: David Miller <davem@davemloft.net>	2015-11-20 15:55:52 -05:00
Tejun Heo	9acee9c551	kernfs: implement kernfs_path_len() ... Add a function to determine the path length of a kernfs node. This for now will be used by writeback tracepoint updates. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jens Axboe <axboe@fb.com>	2015-08-18 15:49:15 -07:00
Linus Torvalds	0cbee99269	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace ... Pull user namespace updates from Eric Biederman: "Long ago and far away when user namespaces where young it was realized that allowing fresh mounts of proc and sysfs with only user namespace permissions could violate the basic rule that only root gets to decide if proc or sysfs should be mounted at all. Some hacks were put in place to reduce the worst of the damage could be done, and the common sense rule was adopted that fresh mounts of proc and sysfs should allow no more than bind mounts of proc and sysfs. Unfortunately that rule has not been fully enforced. There are two kinds of gaps in that enforcement. Only filesystems mounted on empty directories of proc and sysfs should be ignored but the test for empty directories was insufficient. So in my tree directories on proc, sysctl and sysfs that will always be empty are created specially. Every other technique is imperfect as an ordinary directory can have entries added even after a readdir returns and shows that the directory is empty. Special creation of directories for mount points makes the code in the kernel a smidge clearer about it's purpose. I asked container developers from the various container projects to help test this and no holes were found in the set of mount points on proc and sysfs that are created specially. This set of changes also starts enforcing the mount flags of fresh mounts of proc and sysfs are consistent with the existing mount of proc and sysfs. I expected this to be the boring part of the work but unfortunately unprivileged userspace winds up mounting fresh copies of proc and sysfs with noexec and nosuid clear when root set those flags on the previous mount of proc and sysfs. So for now only the atime, read-only and nodev attributes which userspace happens to keep consistent are enforced. Dealing with the noexec and nosuid attributes remains for another time. This set of changes also addresses an issue with how open file descriptors from /proc/<pid>/ns/* are displayed. Recently readlink of /proc/<pid>/fd has been triggering a WARN_ON that has not been meaningful since it was added (as all of the code in the kernel was converted) and is not now actively wrong. There is also a short list of issues that have not been fixed yet that I will mention briefly. It is possible to rename a directory from below to above a bind mount. At which point any directory pointers below the renamed directory can be walked up to the root directory of the filesystem. With user namespaces enabled a bind mount of the bind mount can be created allowing the user to pick a directory whose children they can rename to outside of the bind mount. This is challenging to fix and doubly so because all obvious solutions must touch code that is in the performance part of pathname resolution. As mentioned above there is also a question of how to ensure that developers by accident or with purpose do not introduce exectuable files on sysfs and proc and in doing so introduce security regressions in the current userspace that will not be immediately obvious and as such are likely to require breaking userspace in painful ways once they are recognized" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: vfs: Remove incorrect debugging WARN in prepend_path mnt: Update fs_fully_visible to test for permanently empty directories sysfs: Create mountpoints with sysfs_create_mount_point sysfs: Add support for permanently empty directories to serve as mount points. kernfs: Add support for always empty directories. proc: Allow creating permanently empty directories that serve as mount points sysctl: Allow creating permanently empty directories that serve as mountpoints. fs: Add helper functions for permanently empty directories. vfs: Ignore unlocked mounts in fs_fully_visible mnt: Modify fs_fully_visible to deal with locked ro nodev and atime mnt: Refactor the logic for mounting sysfs and proc in a user namespace	2015-07-03 15:20:57 -07:00
Eric W. Biederman	ea015218f2	kernfs: Add support for always empty directories. ... Add a new function kernfs_create_empty_dir that can be used to create directory that can not be modified. Update the code to use make_empty_dir_inode when reporting a permanently empty directory to the vfs. Update the code to not allow adding to permanently empty directories. Cc: stable@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>	2015-07-01 10:36:43 -05:00
Tejun Heo	fb02915f47	kernfs: make kernfs_get_inode() public ... Move kernfs_get_inode() prototype from fs/kernfs/kernfs-internal.h to include/linux/kernfs.h. It obtains the matching inode for a kernfs_node. It will be used by cgroup for inode based permission checks for now but is generally useful. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2015-06-18 16:54:28 -04:00
Tejun Heo	dfeb0750b6	kernfs: remove KERNFS_STATIC_NAME ... When a new kernfs node is created, KERNFS_STATIC_NAME is used to avoid making a separate copy of its name. It's currently only used for sysfs attributes whose filenames are required to stay accessible and unchanged. There are rare exceptions where these names are allocated and formatted dynamically but for the vast majority of cases they're consts in the rodata section. Now that kernfs is converted to use kstrdup_const() and kfree_const(), there's little point in keeping KERNFS_STATIC_NAME around. Remove it. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2015-02-13 21:21:36 -08:00
NeilBrown	2b75869bba	sysfs/kernfs: allow attributes to request write buffer be pre-allocated. ... md/raid allows metadata management to be performed in user-space. A various times, particularly on device failure, the metadata needs to be updated before further writes can be permitted. This means that the user-space program which updates metadata much not block on writeout, and so must not allocate memory. mlockall(MCL_CURRENT|MCL_FUTURE) and pre-allocation can avoid all memory allocation issues for user-memory, but that does not help kernel memory. Several kernel objects can be pre-allocated. e.g. files opened before any writes to the array are permitted. However some kernel allocation happens in places that cannot be pre-allocated. In particular, writes to sysfs files (to tell md that it can now allow writes to the array) allocate a buffer using GFP_KERNEL. This patch allows attributes to be marked as "PREALLOC". In that case the maximal buffer is allocated when the file is opened, and then used on each write instead of allocating a new buffer. As the same buffer is now shared for all writes on the same file description, the mutex is extended to cover full use of the buffer including the copy_from_user(). The new __ATTR_PREALLOC() 'or's a new flag in to the 'mode', which is inspected by sysfs_add_file_mode_ns() to determine if the file should be marked as requiring prealloc. Despite the comment, we *do* use ->seq_show together with ->prealloc in this patch. The next patch fixes that. Signed-off-by: NeilBrown <neilb@suse.de> Reviewed-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-11-07 10:53:25 -08:00
Linus Torvalds	40f6123737	Merge branch 'for-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup ... Pull cgroup fixes from Tejun Heo: "Mostly fixes for the fallouts from the recent cgroup core changes. The decoupled nature of cgroup dynamic hierarchy management (hierarchies are created dynamically on mount but may or may not be reused once unmounted depending on remaining usages) led to more ugliness being added to kernfs. Hopefully, this is the last of it" * 'for-3.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cpuset: break kernfs active protection in cpuset_write_resmask() cgroup: fix a race between cgroup_mount() and cgroup_kill_sb() kernfs: introduce kernfs_pin_sb() cgroup: fix mount failure in a corner case cpuset,mempolicy: fix sleeping function called from invalid context cgroup: fix broken css_has_online_children()	2014-07-10 11:38:23 -07:00
Tejun Heo	ecca47ce82	kernfs: kernfs_notify() must be useable from non-sleepable contexts ... d911d98748 ("kernfs: make kernfs_notify() trigger inotify events too") added fsnotify triggering to kernfs_notify() which requires a sleepable context. There are already existing users of kernfs_notify() which invoke it from an atomic context and in general it's silly to require a sleepable context for triggering a notification. The following is an invalid context bug triggerd by md invoking sysfs_notify() from IO completion path. BUG: sleeping function called from invalid context at kernel/locking/mutex.c:586 in_atomic(): 1, irqs_disabled(): 1, pid: 0, name: swapper/1 2 locks held by swapper/1/0: #0: (&(&vblk->vq_lock)->rlock){-.-...}, at: [<ffffffffa0039042>] virtblk_done+0x42/0xe0 [virtio_blk] #1: (&(&bitmap->counts.lock)->rlock){-.....}, at: [<ffffffff81633718>] bitmap_endwrite+0x68/0x240 irq event stamp: 33518 hardirqs last enabled at (33515): [<ffffffff8102544f>] default_idle+0x1f/0x230 hardirqs last disabled at (33516): [<ffffffff818122ed>] common_interrupt+0x6d/0x72 softirqs last enabled at (33518): [<ffffffff810a1272>] _local_bh_enable+0x22/0x50 softirqs last disabled at (33517): [<ffffffff810a29e0>] irq_enter+0x60/0x80 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.16.0-0.rc2.git2.1.fc21.x86_64 #1 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 0000000000000000 f90db13964f4ee05 ffff88007d403b80 ffffffff81807b4c 0000000000000000 ffff88007d403ba8 ffffffff810d4f14 0000000000000000 0000000000441800 ffff880078fa1780 ffff88007d403c38 ffffffff8180caf2 Call Trace: <IRQ> [<ffffffff81807b4c>] dump_stack+0x4d/0x66 [<ffffffff810d4f14>] __might_sleep+0x184/0x240 [<ffffffff8180caf2>] mutex_lock_nested+0x42/0x440 [<ffffffff812d76a0>] kernfs_notify+0x90/0x150 [<ffffffff8163377c>] bitmap_endwrite+0xcc/0x240 [<ffffffffa00de863>] close_write+0x93/0xb0 [raid1] [<ffffffffa00df029>] r1_bio_write_done+0x29/0x50 [raid1] [<ffffffffa00e0474>] raid1_end_write_request+0xe4/0x260 [raid1] [<ffffffff813acb8b>] bio_endio+0x6b/0xa0 [<ffffffff813b46c4>] blk_update_request+0x94/0x420 [<ffffffff813bf0ea>] blk_mq_end_io+0x1a/0x70 [<ffffffffa00392c2>] virtblk_request_done+0x32/0x80 [virtio_blk] [<ffffffff813c0648>] __blk_mq_complete_request+0x88/0x120 [<ffffffff813c070a>] blk_mq_complete_request+0x2a/0x30 [<ffffffffa0039066>] virtblk_done+0x66/0xe0 [virtio_blk] [<ffffffffa002535a>] vring_interrupt+0x3a/0xa0 [virtio_ring] [<ffffffff81116177>] handle_irq_event_percpu+0x77/0x340 [<ffffffff8111647d>] handle_irq_event+0x3d/0x60 [<ffffffff81119436>] handle_edge_irq+0x66/0x130 [<ffffffff8101c3e4>] handle_irq+0x84/0x150 [<ffffffff818146ad>] do_IRQ+0x4d/0xe0 [<ffffffff818122f2>] common_interrupt+0x72/0x72 <EOI> [<ffffffff8105f706>] ? native_safe_halt+0x6/0x10 [<ffffffff81025454>] default_idle+0x24/0x230 [<ffffffff81025f9f>] arch_cpu_idle+0xf/0x20 [<ffffffff810f5adc>] cpu_startup_entry+0x37c/0x7b0 [<ffffffff8104df1b>] start_secondary+0x25b/0x300 This patch fixes it by punting the notification delivery through a work item. This ends up adding an extra pointer to kernfs_elem_attr enlarging kernfs_node by a pointer, which is not ideal but not a very big deal either. If this turns out to be an actual issue, we can move kernfs_elem_attr->size to kernfs_node->iattr later. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Josh Boyer <jwboyer@fedoraproject.org> Cc: Jens Axboe <axboe@kernel.dk> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-07-02 09:32:09 -07:00
Li Zefan	4e26445faa	kernfs: introduce kernfs_pin_sb() ... kernfs_pin_sb() tries to get a refcnt of the superblock. This will be used by cgroupfs. v2: - make kernfs_pin_sb() return the superblock. - drop kernfs_drop_sb(). tj: Updated the comment a bit. [ This is a prerequisite for a bugfix. ] Cc: <stable@vger.kernel.org> # 3.15 Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>	2014-06-30 10:16:25 -04:00
Jianyu Zhan	26fc9cd200	kernfs: move the last knowledge of sysfs out from kernfs ... There is still one residue of sysfs remaining: the sb_magic SYSFS_MAGIC. However this should be kernfs user specific, so this patch moves it out. Kerrnfs user should specify their magic number while mouting. Signed-off-by: Jianyu Zhan <nasa4836@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-05-27 14:33:17 -07:00
Greg Kroah-Hartman	cbfef53360	Merge 3.15-rc6 into driver-core-next ... We want the kernfs fixes in this branch as well for testing. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-05-23 10:13:53 +09:00
Tejun Heo	555724a831	kernfs, sysfs, cgroup: restrict extra perm check on open to sysfs ... The kernfs open method - kernfs_fop_open() - inherited extra permission checks from sysfs. While the vfs layer allows ignoring the read/write permissions checks if the issuer has CAP_DAC_OVERRIDE, sysfs explicitly denied open regardless of the cap if the file doesn't have any of the UGO perms of the requested access or doesn't implement the requested operation. It can be debated whether this was a good idea or not but the behavior is too subtle and dangerous to change at this point. After cgroup got converted to kernfs, this extra perm check also got applied to cgroup breaking libcgroup which opens write-only files with O_RDWR as root. This patch gates the extra open permission check with a new flag KERNFS_ROOT_EXTRA_OPEN_PERM_CHECK and enables it for sysfs. For sysfs, nothing changes. For cgroup, root now can perform any operation regardless of the permissions as it was before kernfs conversion. Note that kernfs still fails unimplemented operations with -EINVAL. While at it, add comments explaining KERNFS_ROOT flags. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Andrey Wagin <avagin@gmail.com> Tested-by: Andrey Wagin <avagin@gmail.com> Cc: Li Zefan <lizefan@huawei.com> References: http://lkml.kernel.org/g/CANaxB-xUm3rJ-Cbp72q-rQJO5mZe1qK6qXsQM=vh0U8upJ44+A@mail.gmail.com Fixes: 2bd59d48eb ("cgroup: convert to kernfs") Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-05-13 13:21:40 +02:00
Tejun Heo	7d568a8383	kernfs: implement kernfs_root->supers list ... Currently, there's no way to find out which super_blocks are associated with a given kernfs_root. Let's implement it - the planned inotify extension to kernfs_notify() needs it. Make kernfs_super_info point back to the super_block and chain it at kernfs_root->supers. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-04-25 11:43:31 -07:00
Tejun Heo	b7ce40cff0	kernfs: cache atomic_write_len in kernfs_open_file ... While implementing atomic_write_len, 4d3773c4bb ("kernfs: implement kernfs_ops->atomic_write_len") moved data copy from userland inside kernfs_get_active() and kernfs_open_file->mutex so that kernfs_ops->atomic_write_len can be accessed before copying buffer from userland; unfortunately, this could lead to locking order inversion involving mmap_sem if copy_from_user() takes a page fault. ====================================================== [ INFO: possible circular locking dependency detected ] 3.14.0-rc4-next-20140228-sasha-00011-g4077c67-dirty #26 Tainted: G W ------------------------------------------------------- trinity-c236/10658 is trying to acquire lock: (&of->mutex#2){+.+.+.}, at: [<fs/kernfs/file.c:487>] kernfs_fop_mmap+0x54/0x120 but task is already holding lock: (&mm->mmap_sem){++++++}, at: [<mm/util.c:397>] vm_mmap_pgoff+0x6e/0xe0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_sem){++++++}: [<kernel/locking/lockdep.c:1945 kernel/locking/lockdep.c:2131>] validate_chain+0x6c5/0x7b0 [<kernel/locking/lockdep.c:3182>] __lock_acquire+0x4cd/0x5a0 [<arch/x86/include/asm/current.h:14 kernel/locking/lockdep.c:3602>] lock_acquire+0x182/0x1d0 [<mm/memory.c:4188>] might_fault+0x7e/0xb0 [<arch/x86/include/asm/uaccess.h:713 fs/kernfs/file.c:291>] kernfs_fop_write+0xd8/0x190 [<fs/read_write.c:473>] vfs_write+0xe3/0x1d0 [<fs/read_write.c:523 fs/read_write.c:515>] SyS_write+0x5d/0xa0 [<arch/x86/kernel/entry_64.S:749>] tracesys+0xdd/0xe2 -> #0 (&of->mutex#2){+.+.+.}: [<kernel/locking/lockdep.c:1840>] check_prev_add+0x13f/0x560 [<kernel/locking/lockdep.c:1945 kernel/locking/lockdep.c:2131>] validate_chain+0x6c5/0x7b0 [<kernel/locking/lockdep.c:3182>] __lock_acquire+0x4cd/0x5a0 [<arch/x86/include/asm/current.h:14 kernel/locking/lockdep.c:3602>] lock_acquire+0x182/0x1d0 [<kernel/locking/mutex.c:470 kernel/locking/mutex.c:571>] mutex_lock_nested+0x6a/0x510 [<fs/kernfs/file.c:487>] kernfs_fop_mmap+0x54/0x120 [<mm/mmap.c:1573>] mmap_region+0x310/0x5c0 [<mm/mmap.c:1365>] do_mmap_pgoff+0x385/0x430 [<mm/util.c:399>] vm_mmap_pgoff+0x8f/0xe0 [<mm/mmap.c:1416 mm/mmap.c:1374>] SyS_mmap_pgoff+0x1b0/0x210 [<arch/x86/kernel/sys_x86_64.c:72>] SyS_mmap+0x1d/0x20 [<arch/x86/kernel/entry_64.S:749>] tracesys+0xdd/0xe2 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_sem); lock(&of->mutex#2); lock(&mm->mmap_sem); lock(&of->mutex#2); *** DEADLOCK *** 1 lock held by trinity-c236/10658: #0: (&mm->mmap_sem){++++++}, at: [<mm/util.c:397>] vm_mmap_pgoff+0x6e/0xe0 stack backtrace: CPU: 2 PID: 10658 Comm: trinity-c236 Tainted: G W 3.14.0-rc4-next-20140228-sasha-00011-g4077c67-dirty #26 0000000000000000 ffff88011911fa48 ffffffff8438e945 0000000000000000 0000000000000000 ffff88011911fa98 ffffffff811a0109 ffff88011911fab8 ffff88011911fab8 ffff88011911fa98 ffff880119128cc0 ffff880119128cf8 Call Trace: [<lib/dump_stack.c:52>] dump_stack+0x52/0x7f [<kernel/locking/lockdep.c:1213>] print_circular_bug+0x129/0x160 [<kernel/locking/lockdep.c:1840>] check_prev_add+0x13f/0x560 [<include/linux/spinlock.h:343 mm/slub.c:1933>] ? deactivate_slab+0x511/0x550 [<kernel/locking/lockdep.c:1945 kernel/locking/lockdep.c:2131>] validate_chain+0x6c5/0x7b0 [<kernel/locking/lockdep.c:3182>] __lock_acquire+0x4cd/0x5a0 [<mm/mmap.c:1552>] ? mmap_region+0x24a/0x5c0 [<arch/x86/include/asm/current.h:14 kernel/locking/lockdep.c:3602>] lock_acquire+0x182/0x1d0 [<fs/kernfs/file.c:487>] ? kernfs_fop_mmap+0x54/0x120 [<kernel/locking/mutex.c:470 kernel/locking/mutex.c:571>] mutex_lock_nested+0x6a/0x510 [<fs/kernfs/file.c:487>] ? kernfs_fop_mmap+0x54/0x120 [<kernel/sched/core.c:2477>] ? get_parent_ip+0x11/0x50 [<fs/kernfs/file.c:487>] ? kernfs_fop_mmap+0x54/0x120 [<fs/kernfs/file.c:487>] kernfs_fop_mmap+0x54/0x120 [<mm/mmap.c:1573>] mmap_region+0x310/0x5c0 [<mm/mmap.c:1365>] do_mmap_pgoff+0x385/0x430 [<mm/util.c:397>] ? vm_mmap_pgoff+0x6e/0xe0 [<mm/util.c:399>] vm_mmap_pgoff+0x8f/0xe0 [<kernel/rcu/update.c:97>] ? __rcu_read_unlock+0x44/0xb0 [<fs/file.c:641>] ? dup_fd+0x3c0/0x3c0 [<mm/mmap.c:1416 mm/mmap.c:1374>] SyS_mmap_pgoff+0x1b0/0x210 [<arch/x86/kernel/sys_x86_64.c:72>] SyS_mmap+0x1d/0x20 [<arch/x86/kernel/entry_64.S:749>] tracesys+0xdd/0xe2 Fix it by caching atomic_write_len in kernfs_open_file during open so that it can be determined without accessing kernfs_ops in kernfs_fop_write(). This restores the structure of kernfs_fop_write() before 4d3773c4bb with updated @len determination logic. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Sasha Levin <sasha.levin@oracle.com> References: http://lkml.kernel.org/g/53113485.2090407@oracle.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-03-08 22:08:29 -08:00
Greg Kroah-Hartman	13df797743	Merge 3.14-rc5 into driver-core-next ... We want the fixes in here.	2014-03-02 20:09:08 -08:00
Li Zefan	fed95bab8d	sysfs: fix namespace refcnt leak ... As mount() and kill_sb() is not a one-to-one match, we shoudn't get ns refcnt unconditionally in sysfs_mount(), and instead we should get the refcnt only when kernfs_mount() allocated a new superblock. v2: - Changed the name of the new argument, suggested by Tejun. - Made the argument optional, suggested by Tejun. v3: - Make the new argument as second-to-last arg, suggested by Tejun. Signed-off-by: Li Zefan <lizefan@huawei.com> Acked-by: Tejun Heo <tj@kernel.org> --- fs/kernfs/mount.c | 8 +++++++- fs/sysfs/mount.c | 5 +++-- include/linux/kernfs.h | 9 +++++---- 3 files changed, 15 insertions(+), 7 deletions(-) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-02-25 07:37:52 -08:00
Tejun Heo	ba341d55a4	kernfs: add CONFIG_KERNFS ... As sysfs was kernfs's only user, kernfs has been piggybacking on CONFIG_SYSFS; however, kernfs is scheduled to grow a new user very soon. Introduce a separate config option CONFIG_KERNFS which is to be selected by kernfs users. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-02-07 16:08:57 -08:00
Tejun Heo	3eef34ad7d	kernfs: implement kernfs_get_parent(), kernfs_name/path() and friends ... kernfs_node->parent and ->name are currently marked as "published" indicating that kernfs users may access them directly; however, those fields may get updated by kernfs_rename[_ns]() and unrestricted access may lead to erroneous values or oops. Protect ->parent and ->name updates with a irq-safe spinlock kernfs_rename_lock and implement the following accessors for these fields. * kernfs_name() - format the node's name into the specified buffer * kernfs_path() - format the node's path into the specified buffer * pr_cont_kernfs_name() - pr_cont a node's name (doesn't need buffer) * pr_cont_kernfs_path() - pr_cont a node's path (doesn't need buffer) * kernfs_get_parent() - pin and return a node's parent All can be called under any context. The recursive sysfs_pathname() in fs/sysfs/dir.c is replaced with kernfs_path() and sysfs_rename_dir_ns() is updated to use kernfs_get_parent() instead of dereferencing parent directly. v2: Dummy definition of kernfs_path() for !CONFIG_KERNFS was missing static inline making it cause a lot of build warnings. Add it. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-02-07 16:05:35 -08:00
Tejun Heo	0c23b2259a	kernfs: implement kernfs_node_from_dentry(), kernfs_root_from_sb() and kernfs_rename() ... Implement helpers to determine node from dentry and root from super_block. Also add a kernfs_rename_ns() wrapper which assumes NULL namespace. These generally make sense and will be used by cgroup. v2: Some dummy implementations for !CONFIG_SYSFS was missing. Fixed. Reported by kbuild test robot. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-02-07 16:00:41 -08:00
Tejun Heo	2536390da0	kernfs: add kernfs_open_file->priv ... Add a private data field to be used by kernfs file operations. This generally makes sense and will be used by cgroup. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-02-07 16:00:40 -08:00
Tejun Heo	4d3773c4bb	kernfs: implement kernfs_ops->atomic_write_len ... A write to a kernfs_node is buffered through a kernel buffer. Writes <= PAGE_SIZE are performed atomically, while larger ones are executed in PAGE_SIZE chunks. While this is enough for sysfs, cgroup which is scheduled to be converted to use kernfs needs a bit more control over it. This patch adds kernfs_ops->atomic_write_len. If not set (zero), the behavior stays the same. If set, writes upto the size are executed atomically and larger writes are rejected with -E2BIG. A different implementation strategy would be allowing configuring chunking size while making the original write size available to the write method; however, such strategy, while being more complicated, doesn't really buy anything. If the write implementation has to handle chunking, the specific chunk size shouldn't matter all that much. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-02-07 15:52:48 -08:00
Tejun Heo	d35258ef70	kernfs: allow nodes to be created in the deactivated state ... Currently, kernfs_nodes are made visible to userland on creation, which makes it difficult for kernfs users to atomically succeed or fail creation of multiple nodes. In addition, if something fails after creating some nodes, the created nodes might already be in use and their active refs need to be drained for removal, which has the potential to introduce tricky reverse locking dependency on active_ref depending on how the error path is synchronized. This patch introduces per-root flag KERNFS_ROOT_CREATE_DEACTIVATED. If set, all nodes under the root are created in the deactivated state and stay invisible to userland until explicitly enabled by the new kernfs_activate() API. Also, nodes which have never been activated are guaranteed to bypass draining on removal thus allowing error paths to not worry about lockding dependency on active_ref draining. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-02-07 15:52:48 -08:00
Tejun Heo	6a7fed4eef	kernfs: implement kernfs_syscall_ops->remount_fs() and ->show_options() ... Add two super_block related syscall callbacks ->remount_fs() and ->show_options() to kernfs_syscall_ops. These simply forward the matching super_operations. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-02-07 15:52:48 -08:00