fae17cd97db0ea1cd73e8e4ddac349f28034ce1c
373 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Greg Kroah-Hartman
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fae17cd97d |
Merge 5.15.52 into android14-5.15
Changes in 5.15.52 tick/nohz: unexport __init-annotated tick_nohz_full_setup() x86, kvm: use proper ASM macros for kvm_vcpu_is_preempted bcache: memset on stack variables in bch_btree_check() and bch_sectors_dirty_init() xfs: use kmem_cache_free() for kmem_cache objects xfs: punch out data fork delalloc blocks on COW writeback failure xfs: Fix the free logic of state in xfs_attr_node_hasname xfs: remove all COW fork extents when remounting readonly xfs: check sb_meta_uuid for dabuf buffer recovery xfs: prevent UAF in xfs_log_item_in_current_chkpt xfs: only bother with sync_filesystem during readonly remount powerpc/ftrace: Remove ftrace init tramp once kernel init is complete fs: add is_idmapped_mnt() helper fs: move mapping helpers fs: tweak fsuidgid_has_mapping() fs: account for filesystem mappings docs: update mapping documentation fs: use low-level mapping helpers fs: remove unused low-level mapping helpers fs: port higher-level mapping helpers fs: add i_user_ns() helper fs: support mapped mounts of mapped filesystems fs: fix acl translation fs: account for group membership rtw88: 8821c: support RFE type4 wifi NIC rtw88: rtw8821c: enable rfe 6 devices net: mscc: ocelot: allow unregistered IP multicast flooding to CPU io_uring: fix not locked access to fixed buf table Linux 5.15.52 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: Icfb690703efd8cab1dffa7ca6cce28bbca635c3d |
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Christian Brauner
|
38753e9173 |
fs: support mapped mounts of mapped filesystems
commit bd303368b776eead1c29e6cdda82bde7128b82a7 upstream.
In previous patches we added new and modified existing helpers to handle
idmapped mounts of filesystems mounted with an idmapping. In this final
patch we convert all relevant places in the vfs to actually pass the
filesystem's idmapping into these helpers.
With this the vfs is in shape to handle idmapped mounts of filesystems
mounted with an idmapping. Note that this is just the generic
infrastructure. Actually adding support for idmapped mounts to a
filesystem mountable with an idmapping is follow-up work.
In this patch we extend the definition of an idmapped mount from a mount
that that has the initial idmapping attached to it to a mount that has
an idmapping attached to it which is not the same as the idmapping the
filesystem was mounted with.
As before we do not allow the initial idmapping to be attached to a
mount. In addition this patch prevents that the idmapping the filesystem
was mounted with can be attached to a mount created based on this
filesystem.
This has multiple reasons and advantages. First, attaching the initial
idmapping or the filesystem's idmapping doesn't make much sense as in
both cases the values of the i_{g,u}id and other places where k{g,u}ids
are used do not change. Second, a user that really wants to do this for
whatever reason can just create a separate dedicated identical idmapping
to attach to the mount. Third, we can continue to use the initial
idmapping as an indicator that a mount is not idmapped allowing us to
continue to keep passing the initial idmapping into the mapping helpers
to tell them that something isn't an idmapped mount even if the
filesystem is mounted with an idmapping.
Link: https://lore.kernel.org/r/20211123114227.3124056-11-brauner@kernel.org (v1)
Link: https://lore.kernel.org/r/20211130121032.3753852-11-brauner@kernel.org (v2)
Link: https://lore.kernel.org/r/20211203111707.3901969-11-brauner@kernel.org
Cc: Seth Forshee <sforshee@digitalocean.com>
Cc: Amir Goldstein <amir73il@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
CC: linux-fsdevel@vger.kernel.org
Reviewed-by: Seth Forshee <sforshee@digitalocean.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Christian Brauner
|
f895d0ff47 |
fs: use low-level mapping helpers
commit 4472071331549e911a5abad41aea6e3be855a1a4 upstream.
In a few places the vfs needs to interact with bare k{g,u}ids directly
instead of struct inode. These are just a few. In previous patches we
introduced low-level mapping helpers that are able to support
filesystems mounted an idmapping. This patch simply converts the places
to use these new helpers.
Link: https://lore.kernel.org/r/20211123114227.3124056-7-brauner@kernel.org (v1)
Link: https://lore.kernel.org/r/20211130121032.3753852-7-brauner@kernel.org (v2)
Link: https://lore.kernel.org/r/20211203111707.3901969-7-brauner@kernel.org
Cc: Seth Forshee <sforshee@digitalocean.com>
Cc: Amir Goldstein <amir73il@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
CC: linux-fsdevel@vger.kernel.org
Reviewed-by: Seth Forshee <sforshee@digitalocean.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Christian Brauner
|
7bc23abcb4 |
fs: move mapping helpers
commit a793d79ea3e041081cd7cbd8ee43d0b5e4914a2b upstream.
The low-level mapping helpers were so far crammed into fs.h. They are
out of place there. The fs.h header should just contain the higher-level
mapping helpers that interact directly with vfs objects such as struct
super_block or struct inode and not the bare mapping helpers. Similarly,
only vfs and specific fs code shall interact with low-level mapping
helpers. And so they won't be made accessible automatically through
regular {g,u}id helpers.
Link: https://lore.kernel.org/r/20211123114227.3124056-3-brauner@kernel.org (v1)
Link: https://lore.kernel.org/r/20211130121032.3753852-3-brauner@kernel.org (v2)
Link: https://lore.kernel.org/r/20211203111707.3901969-3-brauner@kernel.org
Cc: Seth Forshee <sforshee@digitalocean.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
CC: linux-fsdevel@vger.kernel.org
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Seth Forshee <sforshee@digitalocean.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Greg Kroah-Hartman
|
0a77fca3aa |
ANDROID: GKI: set vfs-only exports into their own namespace
We have namespaces, so use them for all vfs-exported namespaces so that filesystems can use them, but not anything else. Some in-kernel drivers that do direct filesystem accesses (because they serve up files) are also allowed access to these symbols to keep 'make allmodconfig' builds working properly, but it is not needed for Android kernel images. Bug: 157965270 Bug: 210074446 Cc: Matthias Maennich <maennich@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: Iaf6140baf3a18a516ab2d5c3966235c42f3f70de |
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David Anderson
|
e884438aa5 |
Revert "FROMLIST: Add flags option to get xattr method paired to..."
Revert submission 1881578 Reason for revert: broken build in CI Reverted Changes: Id2c6fa6ee:FROMLIST: Add flags option to get xattr method pai... Ifa966dabd:FROMLIST: overlayfs: inode_owner_or_capable called... I46e6c74ff:FROMLIST: overlayfs: override_creds=off option byp... I0b8fe9f1f:FROMLIST: overlayfs: handle XATTR_NOSECURITY flag ... Change-Id: Ic4f9a8dd92dc492ed0a474c783497ec525f1c762 Signed-off-by: David Anderson <dvander@google.com> |
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Greg Kroah-Hartman
|
36de88a855 |
Merge 5.15.3 into android13-5.15
Changes in 5.15.3
xhci: Fix USB 3.1 enumeration issues by increasing roothub power-on-good delay
usb: xhci: Enable runtime-pm by default on AMD Yellow Carp platform
Input: iforce - fix control-message timeout
Input: elantench - fix misreporting trackpoint coordinates
Input: i8042 - Add quirk for Fujitsu Lifebook T725
libata: fix read log timeout value
ocfs2: fix data corruption on truncate
scsi: scsi_ioctl: Validate command size
scsi: core: Avoid leaving shost->last_reset with stale value if EH does not run
scsi: core: Remove command size deduction from scsi_setup_scsi_cmnd()
scsi: lpfc: Don't release final kref on Fport node while ABTS outstanding
scsi: lpfc: Fix FCP I/O flush functionality for TMF routines
scsi: qla2xxx: Fix crash in NVMe abort path
scsi: qla2xxx: Fix kernel crash when accessing port_speed sysfs file
scsi: qla2xxx: Fix use after free in eh_abort path
ce/gf100: fix incorrect CE0 address calculation on some GPUs
char: xillybus: fix msg_ep UAF in xillyusb_probe()
mmc: mtk-sd: Add wait dma stop done flow
mmc: dw_mmc: Dont wait for DRTO on Write RSP error
exfat: fix incorrect loading of i_blocks for large files
io-wq: remove worker to owner tw dependency
parisc: Fix set_fixmap() on PA1.x CPUs
parisc: Fix ptrace check on syscall return
tpm: Check for integer overflow in tpm2_map_response_body()
firmware/psci: fix application of sizeof to pointer
crypto: s5p-sss - Add error handling in s5p_aes_probe()
media: rkvdec: Do not override sizeimage for output format
media: ite-cir: IR receiver stop working after receive overflow
media: rkvdec: Support dynamic resolution changes
media: ir-kbd-i2c: improve responsiveness of hauppauge zilog receivers
media: v4l2-ioctl: Fix check_ext_ctrls
ALSA: hda/realtek: Fix mic mute LED for the HP Spectre x360 14
ALSA: hda/realtek: Add a quirk for HP OMEN 15 mute LED
ALSA: hda/realtek: Add quirk for Clevo PC70HS
ALSA: hda/realtek: Headset fixup for Clevo NH77HJQ
ALSA: hda/realtek: Add a quirk for Acer Spin SP513-54N
ALSA: hda/realtek: Add quirk for ASUS UX550VE
ALSA: hda/realtek: Add quirk for HP EliteBook 840 G7 mute LED
ALSA: ua101: fix division by zero at probe
ALSA: 6fire: fix control and bulk message timeouts
ALSA: line6: fix control and interrupt message timeouts
ALSA: mixer: oss: Fix racy access to slots
ALSA: mixer: fix deadlock in snd_mixer_oss_set_volume
ALSA: usb-audio: Line6 HX-Stomp XL USB_ID for 48k-fixed quirk
ALSA: usb-audio: Add registration quirk for JBL Quantum 400
ALSA: hda: Free card instance properly at probe errors
ALSA: synth: missing check for possible NULL after the call to kstrdup
ALSA: pci: rme: Fix unaligned buffer addresses
ALSA: PCM: Fix NULL dereference at mmap checks
ALSA: timer: Fix use-after-free problem
ALSA: timer: Unconditionally unlink slave instances, too
Revert "ext4: enforce buffer head state assertion in ext4_da_map_blocks"
ext4: fix lazy initialization next schedule time computation in more granular unit
ext4: ensure enough credits in ext4_ext_shift_path_extents
ext4: refresh the ext4_ext_path struct after dropping i_data_sem.
fuse: fix page stealing
x86/sme: Use #define USE_EARLY_PGTABLE_L5 in mem_encrypt_identity.c
x86/cpu: Fix migration safety with X86_BUG_NULL_SEL
x86/irq: Ensure PI wakeup handler is unregistered before module unload
x86/iopl: Fake iopl(3) CLI/STI usage
btrfs: clear MISSING device status bit in btrfs_close_one_device
btrfs: fix lost error handling when replaying directory deletes
btrfs: call btrfs_check_rw_degradable only if there is a missing device
KVM: x86/mmu: Drop a redundant, broken remote TLB flush
KVM: VMX: Unregister posted interrupt wakeup handler on hardware unsetup
KVM: PPC: Tick accounting should defer vtime accounting 'til after IRQ handling
ia64: kprobes: Fix to pass correct trampoline address to the handler
selinux: fix race condition when computing ocontext SIDs
ipmi:watchdog: Set panic count to proper value on a panic
md/raid1: only allocate write behind bio for WriteMostly device
hwmon: (pmbus/lm25066) Add offset coefficients
regulator: s5m8767: do not use reset value as DVS voltage if GPIO DVS is disabled
regulator: dt-bindings: samsung,s5m8767: correct s5m8767,pmic-buck-default-dvs-idx property
EDAC/sb_edac: Fix top-of-high-memory value for Broadwell/Haswell
mwifiex: fix division by zero in fw download path
ath6kl: fix division by zero in send path
ath6kl: fix control-message timeout
ath10k: fix control-message timeout
ath10k: fix division by zero in send path
PCI: Mark Atheros QCA6174 to avoid bus reset
rtl8187: fix control-message timeouts
evm: mark evm_fixmode as __ro_after_init
ifb: Depend on netfilter alternatively to tc
platform/surface: aggregator_registry: Add support for Surface Laptop Studio
mt76: mt7615: fix skb use-after-free on mac reset
HID: surface-hid: Use correct event registry for managing HID events
HID: surface-hid: Allow driver matching for target ID 1 devices
wcn36xx: Fix HT40 capability for 2Ghz band
wcn36xx: Fix tx_status mechanism
wcn36xx: Fix (QoS) null data frame bitrate/modulation
PM: sleep: Do not let "syscore" devices runtime-suspend during system transitions
mwifiex: Read a PCI register after writing the TX ring write pointer
mwifiex: Try waking the firmware until we get an interrupt
libata: fix checking of DMA state
dma-buf: fix and rework dma_buf_poll v7
wcn36xx: handle connection loss indication
rsi: fix occasional initialisation failure with BT coex
rsi: fix key enabled check causing unwanted encryption for vap_id > 0
rsi: fix rate mask set leading to P2P failure
rsi: Fix module dev_oper_mode parameter description
perf/x86/intel/uncore: Support extra IMC channel on Ice Lake server
perf/x86/intel/uncore: Fix invalid unit check
perf/x86/intel/uncore: Fix Intel ICX IIO event constraints
RDMA/qedr: Fix NULL deref for query_qp on the GSI QP
ASoC: tegra: Set default card name for Trimslice
ASoC: tegra: Restore AC97 support
signal: Remove the bogus sigkill_pending in ptrace_stop
memory: renesas-rpc-if: Correct QSPI data transfer in Manual mode
signal/mips: Update (_save|_restore)_fp_context to fail with -EFAULT
signal: Add SA_IMMUTABLE to ensure forced siganls do not get changed
soc: samsung: exynos-pmu: Fix compilation when nothing selects CONFIG_MFD_CORE
soc: fsl: dpio: replace smp_processor_id with raw_smp_processor_id
soc: fsl: dpio: use the combined functions to protect critical zone
mtd: rawnand: socrates: Keep the driver compatible with on-die ECC engines
mctp: handle the struct sockaddr_mctp padding fields
power: supply: max17042_battery: Prevent int underflow in set_soc_threshold
power: supply: max17042_battery: use VFSOC for capacity when no rsns
iio: core: fix double free in iio_device_unregister_sysfs()
iio: core: check return value when calling dev_set_name()
KVM: arm64: Extract ESR_ELx.EC only
KVM: x86: Fix recording of guest steal time / preempted status
KVM: x86: Add helper to consolidate core logic of SET_CPUID{2} flows
KVM: nVMX: Query current VMCS when determining if MSR bitmaps are in use
KVM: nVMX: Handle dynamic MSR intercept toggling
can: peak_usb: always ask for BERR reporting for PCAN-USB devices
can: mcp251xfd: mcp251xfd_irq(): add missing can_rx_offload_threaded_irq_finish() in case of bus off
can: j1939: j1939_tp_cmd_recv(): ignore abort message in the BAM transport
can: j1939: j1939_can_recv(): ignore messages with invalid source address
can: j1939: j1939_tp_cmd_recv(): check the dst address of TP.CM_BAM
iio: adc: tsc2046: fix scan interval warning
powerpc/85xx: Fix oops when mpc85xx_smp_guts_ids node cannot be found
io_uring: honour zeroes as io-wq worker limits
ring-buffer: Protect ring_buffer_reset() from reentrancy
serial: core: Fix initializing and restoring termios speed
ifb: fix building without CONFIG_NET_CLS_ACT
xen/balloon: add late_initcall_sync() for initial ballooning done
ovl: fix use after free in struct ovl_aio_req
ovl: fix filattr copy-up failure
PCI: pci-bridge-emul: Fix emulation of W1C bits
PCI: cadence: Add cdns_plat_pcie_probe() missing return
cxl/pci: Fix NULL vs ERR_PTR confusion
PCI: aardvark: Do not clear status bits of masked interrupts
PCI: aardvark: Fix checking for link up via LTSSM state
PCI: aardvark: Do not unmask unused interrupts
PCI: aardvark: Fix reporting Data Link Layer Link Active
PCI: aardvark: Fix configuring Reference clock
PCI: aardvark: Fix return value of MSI domain .alloc() method
PCI: aardvark: Read all 16-bits from PCIE_MSI_PAYLOAD_REG
PCI: aardvark: Fix support for bus mastering and PCI_COMMAND on emulated bridge
PCI: aardvark: Fix support for PCI_BRIDGE_CTL_BUS_RESET on emulated bridge
PCI: aardvark: Set PCI Bridge Class Code to PCI Bridge
PCI: aardvark: Fix support for PCI_ROM_ADDRESS1 on emulated bridge
quota: check block number when reading the block in quota file
quota: correct error number in free_dqentry()
cifs: To match file servers, make sure the server hostname matches
cifs: set a minimum of 120s for next dns resolution
mfd: simple-mfd-i2c: Select MFD_CORE to fix build error
pinctrl: core: fix possible memory leak in pinctrl_enable()
coresight: cti: Correct the parameter for pm_runtime_put
coresight: trbe: Fix incorrect access of the sink specific data
coresight: trbe: Defer the probe on offline CPUs
iio: buffer: check return value of kstrdup_const()
iio: buffer: Fix memory leak in iio_buffers_alloc_sysfs_and_mask()
iio: buffer: Fix memory leak in __iio_buffer_alloc_sysfs_and_mask()
iio: buffer: Fix memory leak in iio_buffer_register_legacy_sysfs_groups()
drivers: iio: dac: ad5766: Fix dt property name
iio: dac: ad5446: Fix ad5622_write() return value
iio: ad5770r: make devicetree property reading consistent
Documentation:devicetree:bindings:iio:dac: Fix val
USB: serial: keyspan: fix memleak on probe errors
serial: 8250: fix racy uartclk update
ksmbd: set unique value to volume serial field in FS_VOLUME_INFORMATION
io-wq: serialize hash clear with wakeup
serial: 8250: Fix reporting real baudrate value in c_ospeed field
Revert "serial: 8250: Fix reporting real baudrate value in c_ospeed field"
most: fix control-message timeouts
USB: iowarrior: fix control-message timeouts
USB: chipidea: fix interrupt deadlock
power: supply: max17042_battery: Clear status bits in interrupt handler
component: do not leave master devres group open after bind
dma-buf: WARN on dmabuf release with pending attachments
drm: panel-orientation-quirks: Update the Lenovo Ideapad D330 quirk (v2)
drm: panel-orientation-quirks: Add quirk for KD Kurio Smart C15200 2-in-1
drm: panel-orientation-quirks: Add quirk for the Samsung Galaxy Book 10.6
Bluetooth: sco: Fix lock_sock() blockage by memcpy_from_msg()
Bluetooth: fix use-after-free error in lock_sock_nested()
Bluetooth: call sock_hold earlier in sco_conn_del
drm/panel-orientation-quirks: add Valve Steam Deck
rcutorture: Avoid problematic critical section nesting on PREEMPT_RT
platform/x86: wmi: do not fail if disabling fails
drm/amdgpu: move iommu_resume before ip init/resume
MIPS: lantiq: dma: add small delay after reset
MIPS: lantiq: dma: reset correct number of channel
locking/lockdep: Avoid RCU-induced noinstr fail
net: sched: update default qdisc visibility after Tx queue cnt changes
ACPI: resources: Add DMI-based legacy IRQ override quirk
rcu-tasks: Move RTGS_WAIT_CBS to beginning of rcu_tasks_kthread() loop
smackfs: Fix use-after-free in netlbl_catmap_walk()
ath11k: Align bss_chan_info structure with firmware
crypto: aesni - check walk.nbytes instead of err
x86/mm/64: Improve stack overflow warnings
x86: Increase exception stack sizes
mwifiex: Run SET_BSS_MODE when changing from P2P to STATION vif-type
mwifiex: Properly initialize private structure on interface type changes
spi: Check we have a spi_device_id for each DT compatible
fscrypt: allow 256-bit master keys with AES-256-XTS
drm/amdgpu: Fix MMIO access page fault
drm/amd/display: Fix null pointer dereference for encoders
selftests: net: fib_nexthops: Wait before checking reported idle time
ath11k: Avoid reg rules update during firmware recovery
ath11k: add handler for scan event WMI_SCAN_EVENT_DEQUEUED
ath11k: Change DMA_FROM_DEVICE to DMA_TO_DEVICE when map reinjected packets
ath10k: high latency fixes for beacon buffer
octeontx2-pf: Enable promisc/allmulti match MCAM entries.
media: mt9p031: Fix corrupted frame after restarting stream
media: netup_unidvb: handle interrupt properly according to the firmware
media: atomisp: Fix error handling in probe
media: stm32: Potential NULL pointer dereference in dcmi_irq_thread()
media: uvcvideo: Set capability in s_param
media: uvcvideo: Return -EIO for control errors
media: uvcvideo: Set unique vdev name based in type
media: vidtv: Fix memory leak in remove
media: s5p-mfc: fix possible null-pointer dereference in s5p_mfc_probe()
media: s5p-mfc: Add checking to s5p_mfc_probe().
media: videobuf2: rework vb2_mem_ops API
media: imx: set a media_device bus_info string
media: rcar-vin: Use user provided buffers when starting
media: mceusb: return without resubmitting URB in case of -EPROTO error.
ia64: don't do IA64_CMPXCHG_DEBUG without CONFIG_PRINTK
rtw88: fix RX clock gate setting while fifo dump
brcmfmac: Add DMI nvram filename quirk for Cyberbook T116 tablet
media: rcar-csi2: Add checking to rcsi2_start_receiver()
ipmi: Disable some operations during a panic
fs/proc/uptime.c: Fix idle time reporting in /proc/uptime
kselftests/sched: cleanup the child processes
ACPICA: Avoid evaluating methods too early during system resume
cpufreq: Make policy min/max hard requirements
ice: Move devlink port to PF/VF struct
media: imx-jpeg: Fix possible null pointer dereference
media: ipu3-imgu: imgu_fmt: Handle properly try
media: ipu3-imgu: VIDIOC_QUERYCAP: Fix bus_info
media: usb: dvd-usb: fix uninit-value bug in dibusb_read_eeprom_byte()
net-sysfs: try not to restart the syscall if it will fail eventually
drm/amdkfd: rm BO resv on validation to avoid deadlock
tracefs: Have tracefs directories not set OTH permission bits by default
tracing: Disable "other" permission bits in the tracefs files
ath: dfs_pattern_detector: Fix possible null-pointer dereference in channel_detector_create()
KVM: arm64: Propagate errors from __pkvm_prot_finalize hypercall
mmc: moxart: Fix reference count leaks in moxart_probe
iov_iter: Fix iov_iter_get_pages{,_alloc} page fault return value
ACPI: battery: Accept charges over the design capacity as full
ACPI: scan: Release PM resources blocked by unused objects
drm/amd/display: fix null pointer deref when plugging in display
drm/amdkfd: fix resume error when iommu disabled in Picasso
net: phy: micrel: make *-skew-ps check more lenient
leaking_addresses: Always print a trailing newline
thermal/core: Fix null pointer dereference in thermal_release()
drm/msm: prevent NULL dereference in msm_gpu_crashstate_capture()
thermal/drivers/tsens: Add timeout to get_temp_tsens_valid
block: bump max plugged deferred size from 16 to 32
floppy: fix calling platform_device_unregister() on invalid drives
md: update superblock after changing rdev flags in state_store
memstick: r592: Fix a UAF bug when removing the driver
locking/rwsem: Disable preemption for spinning region
lib/xz: Avoid overlapping memcpy() with invalid input with in-place decompression
lib/xz: Validate the value before assigning it to an enum variable
workqueue: make sysfs of unbound kworker cpumask more clever
tracing/cfi: Fix cmp_entries_* functions signature mismatch
mt76: mt7915: fix an off-by-one bound check
mwl8k: Fix use-after-free in mwl8k_fw_state_machine()
iwlwifi: change all JnP to NO-160 configuration
block: remove inaccurate requeue check
media: allegro: ignore interrupt if mailbox is not initialized
drm/amdgpu/pm: properly handle sclk for profiling modes on vangogh
nvmet: fix use-after-free when a port is removed
nvmet-rdma: fix use-after-free when a port is removed
nvmet-tcp: fix use-after-free when a port is removed
nvme: drop scan_lock and always kick requeue list when removing namespaces
samples/bpf: Fix application of sizeof to pointer
arm64: vdso32: suppress error message for 'make mrproper'
PM: hibernate: Get block device exclusively in swsusp_check()
selftests: kvm: fix mismatched fclose() after popen()
selftests/bpf: Fix perf_buffer test on system with offline cpus
iwlwifi: mvm: disable RX-diversity in powersave
smackfs: use __GFP_NOFAIL for smk_cipso_doi()
ARM: clang: Do not rely on lr register for stacktrace
gre/sit: Don't generate link-local addr if addr_gen_mode is IN6_ADDR_GEN_MODE_NONE
can: bittiming: can_fixup_bittiming(): change type of tseg1 and alltseg to unsigned int
gfs2: Cancel remote delete work asynchronously
gfs2: Fix glock_hash_walk bugs
ARM: 9136/1: ARMv7-M uses BE-8, not BE-32
tools/latency-collector: Use correct size when writing queue_full_warning
vrf: run conntrack only in context of lower/physdev for locally generated packets
net: annotate data-race in neigh_output()
ACPI: AC: Quirk GK45 to skip reading _PSR
ACPI: resources: Add one more Medion model in IRQ override quirk
btrfs: reflink: initialize return value to 0 in btrfs_extent_same()
btrfs: do not take the uuid_mutex in btrfs_rm_device
spi: bcm-qspi: Fix missing clk_disable_unprepare() on error in bcm_qspi_probe()
wcn36xx: Correct band/freq reporting on RX
wcn36xx: Fix packet drop on resume
Revert "wcn36xx: Enable firmware link monitoring"
ftrace: do CPU checking after preemption disabled
inet: remove races in inet{6}_getname()
x86/hyperv: Protect set_hv_tscchange_cb() against getting preempted
drm/amd/display: dcn20_resource_construct reduce scope of FPU enabled
selftests/core: fix conflicting types compile error for close_range()
perf/x86/intel: Fix ICL/SPR INST_RETIRED.PREC_DIST encodings
parisc: fix warning in flush_tlb_all
task_stack: Fix end_of_stack() for architectures with upwards-growing stack
erofs: don't trigger WARN() when decompression fails
parisc/unwind: fix unwinder when CONFIG_64BIT is enabled
parisc/kgdb: add kgdb_roundup() to make kgdb work with idle polling
netfilter: conntrack: set on IPS_ASSURED if flows enters internal stream state
selftests/bpf: Fix strobemeta selftest regression
fbdev/efifb: Release PCI device's runtime PM ref during FB destroy
drm/bridge: anx7625: Propagate errors from sp_tx_rst_aux()
perf/x86/intel/uncore: Fix Intel SPR CHA event constraints
perf/x86/intel/uncore: Fix Intel SPR IIO event constraints
perf/x86/intel/uncore: Fix Intel SPR M2PCIE event constraints
perf/x86/intel/uncore: Fix Intel SPR M3UPI event constraints
drm/bridge: it66121: Initialize {device,vendor}_ids
drm/bridge: it66121: Wait for next bridge to be probed
Bluetooth: fix init and cleanup of sco_conn.timeout_work
libbpf: Don't crash on object files with no symbol tables
Bluetooth: hci_uart: fix GPF in h5_recv
rcu: Fix existing exp request check in sync_sched_exp_online_cleanup()
MIPS: lantiq: dma: fix burst length for DEU
x86/xen: Mark cpu_bringup_and_idle() as dead_end_function
objtool: Handle __sanitize_cov*() tail calls
net/mlx5: Publish and unpublish all devlink parameters at once
drm/v3d: fix wait for TMU write combiner flush
crypto: sm4 - Do not change section of ck and sbox
virtio-gpu: fix possible memory allocation failure
lockdep: Let lock_is_held_type() detect recursive read as read
net: net_namespace: Fix undefined member in key_remove_domain()
net: phylink: don't call netif_carrier_off() with NULL netdev
drm: bridge: it66121: Fix return value it66121_probe
spi: Fixed division by zero warning
cgroup: Make rebind_subsystems() disable v2 controllers all at once
wcn36xx: Fix Antenna Diversity Switching
wilc1000: fix possible memory leak in cfg_scan_result()
Bluetooth: btmtkuart: fix a memleak in mtk_hci_wmt_sync
drm/amdgpu: Fix crash on device remove/driver unload
drm/amd/display: Pass display_pipe_params_st as const in DML
drm/amdgpu: move amdgpu_virt_release_full_gpu to fini_early stage
crypto: caam - disable pkc for non-E SoCs
crypto: qat - power up 4xxx device
Bluetooth: hci_h5: Fix (runtime)suspend issues on RTL8723BS HCIs
bnxt_en: Check devlink allocation and registration status
qed: Don't ignore devlink allocation failures
rxrpc: Fix _usecs_to_jiffies() by using usecs_to_jiffies()
mptcp: do not shrink snd_nxt when recovering
fortify: Fix dropped strcpy() compile-time write overflow check
mac80211: twt: don't use potentially unaligned pointer
cfg80211: always free wiphy specific regdomain
net/mlx5: Accept devlink user input after driver initialization complete
net: dsa: rtl8366rb: Fix off-by-one bug
net: dsa: rtl8366: Fix a bug in deleting VLANs
bpf/tests: Fix error in tail call limit tests
ath11k: fix some sleeping in atomic bugs
ath11k: Avoid race during regd updates
ath11k: fix packet drops due to incorrect 6 GHz freq value in rx status
ath11k: Fix memory leak in ath11k_qmi_driver_event_work
gve: DQO: avoid unused variable warnings
ath10k: Fix missing frame timestamp for beacon/probe-resp
ath10k: sdio: Add missing BH locking around napi_schdule()
drm/ttm: stop calling tt_swapin in vm_access
arm64: mm: update max_pfn after memory hotplug
drm/amdgpu: fix warning for overflow check
libbpf: Fix skel_internal.h to set errno on loader retval < 0
media: em28xx: add missing em28xx_close_extension
media: meson-ge2d: Fix rotation parameter changes detection in 'ge2d_s_ctrl()'
media: cxd2880-spi: Fix a null pointer dereference on error handling path
media: ttusb-dec: avoid release of non-acquired mutex
media: dvb-usb: fix ununit-value in az6027_rc_query
media: imx258: Fix getting clock frequency
media: v4l2-ioctl: S_CTRL output the right value
media: mtk-vcodec: venc: fix return value when start_streaming fails
media: TDA1997x: handle short reads of hdmi info frame.
media: mtk-vpu: Fix a resource leak in the error handling path of 'mtk_vpu_probe()'
media: imx-jpeg: Fix the error handling path of 'mxc_jpeg_probe()'
media: i2c: ths8200 needs V4L2_ASYNC
media: sun6i-csi: Allow the video device to be open multiple times
media: radio-wl1273: Avoid card name truncation
media: si470x: Avoid card name truncation
media: tm6000: Avoid card name truncation
media: cx23885: Fix snd_card_free call on null card pointer
media: atmel: fix the ispck initialization
scs: Release kasan vmalloc poison in scs_free process
kprobes: Do not use local variable when creating debugfs file
crypto: ecc - fix CRYPTO_DEFAULT_RNG dependency
drm: fb_helper: fix CONFIG_FB dependency
cpuidle: Fix kobject memory leaks in error paths
media: em28xx: Don't use ops->suspend if it is NULL
ath10k: Don't always treat modem stop events as crashes
ath9k: Fix potential interrupt storm on queue reset
PM: EM: Fix inefficient states detection
x86/insn: Use get_unaligned() instead of memcpy()
EDAC/amd64: Handle three rank interleaving mode
rcu: Always inline rcu_dynticks_task*_{enter,exit}()
rcu: Fix rcu_dynticks_curr_cpu_in_eqs() vs noinstr
netfilter: nft_dynset: relax superfluous check on set updates
media: venus: fix vpp frequency calculation for decoder
media: dvb-frontends: mn88443x: Handle errors of clk_prepare_enable()
crypto: ccree - avoid out-of-range warnings from clang
crypto: qat - detect PFVF collision after ACK
crypto: qat - disregard spurious PFVF interrupts
hwrng: mtk - Force runtime pm ops for sleep ops
ima: fix deadlock when traversing "ima_default_rules".
b43legacy: fix a lower bounds test
b43: fix a lower bounds test
gve: Recover from queue stall due to missed IRQ
gve: Track RX buffer allocation failures
mmc: sdhci-omap: Fix NULL pointer exception if regulator is not configured
mmc: sdhci-omap: Fix context restore
memstick: avoid out-of-range warning
memstick: jmb38x_ms: use appropriate free function in jmb38x_ms_alloc_host()
net, neigh: Fix NTF_EXT_LEARNED in combination with NTF_USE
hwmon: Fix possible memleak in __hwmon_device_register()
hwmon: (pmbus/lm25066) Let compiler determine outer dimension of lm25066_coeff
ath10k: fix max antenna gain unit
kernel/sched: Fix sched_fork() access an invalid sched_task_group
net: fealnx: fix build for UML
net: intel: igc_ptp: fix build for UML
net: tulip: winbond-840: fix build for UML
tcp: switch orphan_count to bare per-cpu counters
crypto: octeontx2 - set assoclen in aead_do_fallback()
thermal/core: fix a UAF bug in __thermal_cooling_device_register()
drm/msm/dsi: do not enable irq handler before powering up the host
drm/msm: Fix potential Oops in a6xx_gmu_rpmh_init()
drm/msm: potential error pointer dereference in init()
drm/msm: unlock on error in get_sched_entity()
drm/msm: fix potential NULL dereference in cleanup
drm/msm: uninitialized variable in msm_gem_import()
net: stream: don't purge sk_error_queue in sk_stream_kill_queues()
thermal/drivers/qcom/lmh: make QCOM_LMH depends on QCOM_SCM
mailbox: Remove WARN_ON for async_cb.cb in cmdq_exec_done
media: ivtv: fix build for UML
media: ir_toy: assignment to be16 should be of correct type
mmc: mxs-mmc: disable regulator on error and in the remove function
io-wq: Remove duplicate code in io_workqueue_create()
block: ataflop: fix breakage introduced at blk-mq refactoring
blk-wbt: prevent NULL pointer dereference in wb_timer_fn
platform/x86: thinkpad_acpi: Fix bitwise vs. logical warning
mailbox: mtk-cmdq: Validate alias_id on probe
mailbox: mtk-cmdq: Fix local clock ID usage
ACPI: PM: Turn off unused wakeup power resources
ACPI: PM: Fix sharing of wakeup power resources
drm/amdkfd: Fix an inappropriate error handling in allloc memory of gpu
mt76: mt7921: fix endianness in mt7921_mcu_tx_done_event
mt76: mt7915: fix endianness warning in mt7915_mac_add_txs_skb
mt76: mt7921: fix endianness warning in mt7921_update_txs
mt76: mt7615: fix endianness warning in mt7615_mac_write_txwi
mt76: mt7915: fix info leak in mt7915_mcu_set_pre_cal()
mt76: connac: fix mt76_connac_gtk_rekey_tlv usage
mt76: fix build error implicit enumeration conversion
mt76: mt7921: fix survey-dump reporting
mt76: mt76x02: fix endianness warnings in mt76x02_mac.c
mt76: mt7921: Fix out of order process by invalid event pkt
mt76: mt7915: fix potential overflow of eeprom page index
mt76: mt7915: fix bit fields for HT rate idx
mt76: mt7921: fix dma hang in rmmod
mt76: connac: fix GTK rekey offload failure on WPA mixed mode
mt76: overwrite default reg_ops if necessary
mt76: mt7921: report HE MU radiotap
mt76: mt7921: fix firmware usage of RA info using legacy rates
mt76: mt7921: fix kernel warning from cfg80211_calculate_bitrate
mt76: mt7921: always wake device if necessary in debugfs
mt76: mt7915: fix hwmon temp sensor mem use-after-free
mt76: mt7615: fix hwmon temp sensor mem use-after-free
mt76: mt7915: fix possible infinite loop release semaphore
mt76: mt7921: fix retrying release semaphore without end
mt76: mt7615: fix monitor mode tear down crash
mt76: connac: fix possible NULL pointer dereference in mt76_connac_get_phy_mode_v2
mt76: mt7915: fix sta_rec_wtbl tag len
mt76: mt7915: fix muar_idx in mt7915_mcu_alloc_sta_req()
rsi: stop thread firstly in rsi_91x_init() error handling
mwifiex: Send DELBA requests according to spec
iwlwifi: mvm: reset PM state on unsuccessful resume
iwlwifi: pnvm: don't kmemdup() more than we have
iwlwifi: pnvm: read EFI data only if long enough
net: enetc: unmap DMA in enetc_send_cmd()
phy: micrel: ksz8041nl: do not use power down mode
nbd: Fix use-after-free in pid_show
nvme-rdma: fix error code in nvme_rdma_setup_ctrl
PM: hibernate: fix sparse warnings
clocksource/drivers/timer-ti-dm: Select TIMER_OF
x86/sev: Fix stack type check in vc_switch_off_ist()
drm/msm: Fix potential NULL dereference in DPU SSPP
drm/msm/dsi: fix wrong type in msm_dsi_host
crypto: tcrypt - fix skcipher multi-buffer tests for 1420B blocks
smackfs: use netlbl_cfg_cipsov4_del() for deleting cipso_v4_doi
KVM: selftests: Fix nested SVM tests when built with clang
libbpf: Fix memory leak in btf__dedup()
bpftool: Avoid leaking the JSON writer prepared for program metadata
libbpf: Fix overflow in BTF sanity checks
libbpf: Fix BTF header parsing checks
mt76: mt7615: mt7622: fix ibss and meshpoint
s390/gmap: validate VMA in __gmap_zap()
s390/gmap: don't unconditionally call pte_unmap_unlock() in __gmap_zap()
s390/mm: validate VMA in PGSTE manipulation functions
s390/mm: fix VMA and page table handling code in storage key handling functions
s390/uv: fully validate the VMA before calling follow_page()
KVM: s390: pv: avoid double free of sida page
KVM: s390: pv: avoid stalls for kvm_s390_pv_init_vm
irq: mips: avoid nested irq_enter()
net: dsa: avoid refcount warnings when ->port_{fdb,mdb}_del returns error
ARM: 9142/1: kasan: work around LPAE build warning
ath10k: fix module load regression with iram-recovery feature
block: ataflop: more blk-mq refactoring fixes
blk-cgroup: synchronize blkg creation against policy deactivation
libbpf: Fix off-by-one bug in bpf_core_apply_relo()
tpm: fix Atmel TPM crash caused by too frequent queries
tpm_tis_spi: Add missing SPI ID
libbpf: Fix endianness detection in BPF_CORE_READ_BITFIELD_PROBED()
tcp: don't free a FIN sk_buff in tcp_remove_empty_skb()
tracing: Fix missing trace_boot_init_histograms kstrdup NULL checks
cpufreq: intel_pstate: Fix cpu->pstate.turbo_freq initialization
spi: spi-rpc-if: Check return value of rpcif_sw_init()
samples/kretprobes: Fix return value if register_kretprobe() failed
KVM: s390: Fix handle_sske page fault handling
libertas_tf: Fix possible memory leak in probe and disconnect
libertas: Fix possible memory leak in probe and disconnect
wcn36xx: add proper DMA memory barriers in rx path
wcn36xx: Fix discarded frames due to wrong sequence number
bpf: Avoid races in __bpf_prog_run() for 32bit arches
bpf: Fixes possible race in update_prog_stats() for 32bit arches
wcn36xx: Channel list update before hardware scan
drm/amdgpu: fix a potential memory leak in amdgpu_device_fini_sw()
drm/amdgpu/gmc6: fix DMA mask from 44 to 40 bits
selftests/bpf: Fix fd cleanup in sk_lookup test
selftests/bpf: Fix memory leak in test_ima
sctp: allow IP fragmentation when PLPMTUD enters Error state
sctp: reset probe_timer in sctp_transport_pl_update
sctp: subtract sctphdr len in sctp_transport_pl_hlen
sctp: return true only for pathmtu update in sctp_transport_pl_toobig
net: amd-xgbe: Toggle PLL settings during rate change
ipmi: kcs_bmc: Fix a memory leak in the error handling path of 'kcs_bmc_serio_add_device()'
nfp: fix NULL pointer access when scheduling dim work
nfp: fix potential deadlock when canceling dim work
net: phylink: avoid mvneta warning when setting pause parameters
net: bridge: fix uninitialized variables when BRIDGE_CFM is disabled
selftests: net: bridge: update IGMP/MLD membership interval value
crypto: pcrypt - Delay write to padata->info
selftests/bpf: Fix fclose/pclose mismatch in test_progs
udp6: allow SO_MARK ctrl msg to affect routing
ibmvnic: don't stop queue in xmit
ibmvnic: Process crqs after enabling interrupts
ibmvnic: delay complete()
selftests: mptcp: fix proto type in link_failure tests
skmsg: Lose offset info in sk_psock_skb_ingress
cgroup: Fix rootcg cpu.stat guest double counting
bpf: Fix propagation of bounds from 64-bit min/max into 32-bit and var_off.
bpf: Fix propagation of signed bounds from 64-bit min/max into 32-bit.
of: unittest: fix EXPECT text for gpio hog errors
cpufreq: Fix parameter in parse_perf_domain()
staging: r8188eu: fix memory leak in rtw_set_key
arm64: dts: meson: sm1: add Ethernet PHY reset line for ODROID-C4/HC4
iio: st_sensors: disable regulators after device unregistration
RDMA/rxe: Fix wrong port_cap_flags
ARM: dts: BCM5301X: Fix memory nodes names
arm64: dts: broadcom: bcm4908: Fix UART clock name
clk: mvebu: ap-cpu-clk: Fix a memory leak in error handling paths
scsi: pm80xx: Fix lockup in outbound queue management
scsi: qla2xxx: edif: Use link event to wake up app
scsi: lpfc: Fix NVMe I/O failover to non-optimized path
ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
arm64: dts: rockchip: Fix GPU register width for RK3328
ARM: dts: qcom: msm8974: Add xo_board reference clock to DSI0 PHY
RDMA/bnxt_re: Fix query SRQ failure
arm64: dts: ti: k3-j721e-main: Fix "max-virtual-functions" in PCIe EP nodes
arm64: dts: ti: k3-j721e-main: Fix "bus-range" upto 256 bus number for PCIe
arm64: dts: ti: j7200-main: Fix "vendor-id"/"device-id" properties of pcie node
arm64: dts: ti: j7200-main: Fix "bus-range" upto 256 bus number for PCIe
arm64: dts: meson-g12a: Fix the pwm regulator supply properties
arm64: dts: meson-g12b: Fix the pwm regulator supply properties
arm64: dts: meson-sm1: Fix the pwm regulator supply properties
bus: ti-sysc: Fix timekeeping_suspended warning on resume
ARM: dts: at91: tse850: the emac<->phy interface is rmii
arm64: dts: qcom: sc7180: Base dynamic CPU power coefficients in reality
soc: qcom: llcc: Disable MMUHWT retention
arm64: dts: qcom: sc7280: fix display port phy reg property
scsi: dc395: Fix error case unwinding
MIPS: loongson64: make CPU_LOONGSON64 depends on MIPS_FP_SUPPORT
JFS: fix memleak in jfs_mount
pinctrl: renesas: rzg2l: Fix missing port register 21h
ASoC: wcd9335: Use correct version to initialize Class H
arm64: dts: qcom: msm8916: Fix Secondary MI2S bit clock
arm64: dts: renesas: beacon: Fix Ethernet PHY mode
iommu/mediatek: Fix out-of-range warning with clang
arm64: dts: qcom: pm8916: Remove wrong reg-names for rtc@6000
iommu/dma: Fix sync_sg with swiotlb
iommu/dma: Fix arch_sync_dma for map
ALSA: hda: Reduce udelay() at SKL+ position reporting
ALSA: hda: Use position buffer for SKL+ again
ALSA: usb-audio: Fix possible race at sync of urb completions
soundwire: debugfs: use controller id and link_id for debugfs
power: reset: at91-reset: check properly the return value of devm_of_iomap
scsi: ufs: core: Fix ufshcd_probe_hba() prototype to match the definition
scsi: ufs: core: Stop clearing UNIT ATTENTIONS
scsi: megaraid_sas: Fix concurrent access to ISR between IRQ polling and real interrupt
scsi: pm80xx: Fix misleading log statement in pm8001_mpi_get_nvmd_resp()
driver core: Fix possible memory leak in device_link_add()
arm: dts: omap3-gta04a4: accelerometer irq fix
ASoC: SOF: topology: do not power down primary core during topology removal
iio: st_pressure_spi: Add missing entries SPI to device ID table
soc/tegra: Fix an error handling path in tegra_powergate_power_up()
memory: fsl_ifc: fix leak of irq and nand_irq in fsl_ifc_ctrl_probe
clk: at91: check pmc node status before registering syscore ops
powerpc/mem: Fix arch/powerpc/mm/mem.c:53:12: error: no previous prototype for 'create_section_mapping'
video: fbdev: chipsfb: use memset_io() instead of memset()
powerpc: fix unbalanced node refcount in check_kvm_guest()
powerpc/paravirt: correct preempt debug splat in vcpu_is_preempted()
serial: 8250_dw: Drop wrong use of ACPI_PTR()
usb: gadget: hid: fix error code in do_config()
power: supply: rt5033_battery: Change voltage values to µV
power: supply: max17040: fix null-ptr-deref in max17040_probe()
scsi: csiostor: Uninitialized data in csio_ln_vnp_read_cbfn()
RDMA/mlx4: Return missed an error if device doesn't support steering
usb: musb: select GENERIC_PHY instead of depending on it
staging: most: dim2: do not double-register the same device
staging: ks7010: select CRYPTO_HASH/CRYPTO_MICHAEL_MIC
RDMA/core: Set sgtable nents when using ib_dma_virt_map_sg()
dyndbg: make dyndbg a known cli param
powerpc/perf: Fix cycles/instructions as PM_CYC/PM_INST_CMPL in power10
pinctrl: renesas: checker: Fix off-by-one bug in drive register check
ARM: dts: stm32: Reduce DHCOR SPI NOR frequency to 50 MHz
ARM: dts: stm32: fix STUSB1600 Type-C irq level on stm32mp15xx-dkx
ARM: dts: stm32: fix SAI sub nodes register range
ARM: dts: stm32: fix AV96 board SAI2 pin muxing on stm32mp15
ASoC: cs42l42: Always configure both ASP TX channels
ASoC: cs42l42: Correct some register default values
ASoC: cs42l42: Defer probe if request_threaded_irq() returns EPROBE_DEFER
soc: qcom: rpmhpd: Make power_on actually enable the domain
soc: qcom: socinfo: add two missing PMIC IDs
iio: buffer: Fix double-free in iio_buffers_alloc_sysfs_and_mask()
usb: typec: STUSB160X should select REGMAP_I2C
iio: adis: do not disabe IRQs in 'adis_init()'
soundwire: bus: stop dereferencing invalid slave pointer
scsi: ufs: ufshcd-pltfrm: Fix memory leak due to probe defer
scsi: lpfc: Wait for successful restart of SLI3 adapter during host sg_reset
serial: imx: fix detach/attach of serial console
usb: dwc2: drd: fix dwc2_force_mode call in dwc2_ovr_init
usb: dwc2: drd: fix dwc2_drd_role_sw_set when clock could be disabled
usb: dwc2: drd: reset current session before setting the new one
powerpc/booke: Disable STRICT_KERNEL_RWX, DEBUG_PAGEALLOC and KFENCE
usb: dwc3: gadget: Skip resizing EP's TX FIFO if already resized
firmware: qcom_scm: Fix error retval in __qcom_scm_is_call_available()
soc: qcom: rpmhpd: fix sm8350_mxc's peer domain
soc: qcom: apr: Add of_node_put() before return
arm64: dts: qcom: pmi8994: Fix "eternal"->"external" typo in WLED node
arm64: dts: qcom: sdm845: Use RPMH_CE_CLK macro directly
arm64: dts: qcom: sdm845: Fix Qualcomm crypto engine bus clock
pinctrl: equilibrium: Fix function addition in multiple groups
ASoC: topology: Fix stub for snd_soc_tplg_component_remove()
phy: qcom-qusb2: Fix a memory leak on probe
phy: ti: gmii-sel: check of_get_address() for failure
phy: qcom-qmp: another fix for the sc8180x PCIe definition
phy: qcom-snps: Correct the FSEL_MASK
phy: Sparx5 Eth SerDes: Fix return value check in sparx5_serdes_probe()
serial: xilinx_uartps: Fix race condition causing stuck TX
clk: at91: sam9x60-pll: use DIV_ROUND_CLOSEST_ULL
clk: at91: clk-master: check if div or pres is zero
clk: at91: clk-master: fix prescaler logic
HID: u2fzero: clarify error check and length calculations
HID: u2fzero: properly handle timeouts in usb_submit_urb
powerpc/nohash: Fix __ptep_set_access_flags() and ptep_set_wrprotect()
powerpc/book3e: Fix set_memory_x() and set_memory_nx()
powerpc/44x/fsp2: add missing of_node_put
powerpc/xmon: fix task state output
ALSA: oxfw: fix functional regression for Mackie Onyx 1640i in v5.14 or later
iommu/dma: Fix incorrect error return on iommu deferred attach
powerpc: Don't provide __kernel_map_pages() without ARCH_SUPPORTS_DEBUG_PAGEALLOC
ASoC: cs42l42: Correct configuring of switch inversion from ts-inv
RDMA/hns: Fix initial arm_st of CQ
RDMA/hns: Modify the value of MAX_LP_MSG_LEN to meet hardware compatibility
ASoC: rsnd: Fix an error handling path in 'rsnd_node_count()'
serial: cpm_uart: Protect udbg definitions by CONFIG_SERIAL_CPM_CONSOLE
virtio_ring: check desc == NULL when using indirect with packed
vdpa/mlx5: Fix clearing of VIRTIO_NET_F_MAC feature bit
mips: cm: Convert to bitfield API to fix out-of-bounds access
power: supply: bq27xxx: Fix kernel crash on IRQ handler register error
RDMA/core: Require the driver to set the IOVA correctly during rereg_mr
apparmor: fix error check
rpmsg: Fix rpmsg_create_ept return when RPMSG config is not defined
mtd: rawnand: intel: Fix potential buffer overflow in probe
nfsd: don't alloc under spinlock in rpc_parse_scope_id
rtc: ds1302: Add SPI ID table
rtc: ds1390: Add SPI ID table
rtc: pcf2123: Add SPI ID table
remoteproc: imx_rproc: Fix TCM io memory type
i2c: i801: Use PCI bus rescan mutex to protect P2SB access
dmaengine: idxd: move out percpu_ref_exit() to ensure it's outside submission
rtc: mcp795: Add SPI ID table
Input: ariel-pwrbutton - add SPI device ID table
i2c: mediatek: fixing the incorrect register offset
NFS: Default change_attr_type to NFS4_CHANGE_TYPE_IS_UNDEFINED
NFS: Don't set NFS_INO_DATA_INVAL_DEFER and NFS_INO_INVALID_DATA
NFS: Ignore the directory size when marking for revalidation
NFS: Fix dentry verifier races
pnfs/flexfiles: Fix misplaced barrier in nfs4_ff_layout_prepare_ds
drm/bridge/lontium-lt9611uxc: fix provided connector suport
drm/plane-helper: fix uninitialized variable reference
PCI: aardvark: Don't spam about PIO Response Status
PCI: aardvark: Fix preserving PCI_EXP_RTCTL_CRSSVE flag on emulated bridge
opp: Fix return in _opp_add_static_v2()
NFS: Fix deadlocks in nfs_scan_commit_list()
sparc: Add missing "FORCE" target when using if_changed
fs: orangefs: fix error return code of orangefs_revalidate_lookup()
Input: st1232 - increase "wait ready" timeout
drm/bridge: nwl-dsi: Add atomic_get_input_bus_fmts
mtd: spi-nor: hisi-sfc: Remove excessive clk_disable_unprepare()
PCI: uniphier: Serialize INTx masking/unmasking and fix the bit operation
mtd: rawnand: arasan: Prevent an unsupported configuration
mtd: core: don't remove debugfs directory if device is in use
remoteproc: Fix a memory leak in an error handling path in 'rproc_handle_vdev()'
rtc: rv3032: fix error handling in rv3032_clkout_set_rate()
dmaengine: at_xdmac: call at_xdmac_axi_config() on resume path
dmaengine: at_xdmac: fix AT_XDMAC_CC_PERID() macro
dmaengine: stm32-dma: fix stm32_dma_get_max_width
NFS: Fix up commit deadlocks
NFS: Fix an Oops in pnfs_mark_request_commit()
Fix user namespace leak
auxdisplay: img-ascii-lcd: Fix lock-up when displaying empty string
auxdisplay: ht16k33: Connect backlight to fbdev
auxdisplay: ht16k33: Fix frame buffer device blanking
soc: fsl: dpaa2-console: free buffer before returning from dpaa2_console_read
netfilter: nfnetlink_queue: fix OOB when mac header was cleared
dmaengine: dmaengine_desc_callback_valid(): Check for `callback_result`
dmaengine: tegra210-adma: fix pm runtime unbalance
dmanegine: idxd: fix resource free ordering on driver removal
dmaengine: idxd: reconfig device after device reset command
signal/sh: Use force_sig(SIGKILL) instead of do_group_exit(SIGKILL)
m68k: set a default value for MEMORY_RESERVE
watchdog: f71808e_wdt: fix inaccurate report in WDIOC_GETTIMEOUT
ar7: fix kernel builds for compiler test
scsi: target: core: Remove from tmr_list during LUN unlink
scsi: qla2xxx: Relogin during fabric disturbance
scsi: qla2xxx: Fix gnl list corruption
scsi: qla2xxx: Turn off target reset during issue_lip
scsi: qla2xxx: edif: Fix app start fail
scsi: qla2xxx: edif: Fix app start delay
scsi: qla2xxx: edif: Flush stale events and msgs on session down
scsi: qla2xxx: edif: Increase ELS payload
scsi: qla2xxx: edif: Fix EDIF bsg
NFSv4: Fix a regression in nfs_set_open_stateid_locked()
dmaengine: idxd: fix resource leak on dmaengine driver disable
i2c: xlr: Fix a resource leak in the error handling path of 'xlr_i2c_probe()'
gpio: realtek-otto: fix GPIO line IRQ offset
xen-pciback: Fix return in pm_ctrl_init()
nbd: fix max value for 'first_minor'
nbd: fix possible overflow for 'first_minor' in nbd_dev_add()
io-wq: fix max-workers not correctly set on multi-node system
net: davinci_emac: Fix interrupt pacing disable
kselftests/net: add missed icmp.sh test to Makefile
kselftests/net: add missed setup_loopback.sh/setup_veth.sh to Makefile
kselftests/net: add missed SRv6 tests
kselftests/net: add missed vrf_strict_mode_test.sh test to Makefile
kselftests/net: add missed toeplitz.sh/toeplitz_client.sh to Makefile
ethtool: fix ethtool msg len calculation for pause stats
openrisc: fix SMP tlb flush NULL pointer dereference
net: vlan: fix a UAF in vlan_dev_real_dev()
net: dsa: felix: fix broken VLAN-tagged PTP under VLAN-aware bridge
ice: Fix replacing VF hardware MAC to existing MAC filter
ice: Fix not stopping Tx queues for VFs
kdb: Adopt scheduler's task classification
ACPI: PMIC: Fix intel_pmic_regs_handler() read accesses
PCI: j721e: Fix j721e_pcie_probe() error path
nvdimm/btt: do not call del_gendisk() if not needed
scsi: bsg: Fix errno when scsi_bsg_register_queue() fails
scsi: ufs: ufshpb: Use proper power management API
scsi: ufs: core: Fix NULL pointer dereference
scsi: ufs: ufshpb: Properly handle max-single-cmd
selftests: net: properly support IPv6 in GSO GRE test
drm/nouveau/svm: Fix refcount leak bug and missing check against null bug
nvdimm/pmem: cleanup the disk if pmem_release_disk() is yet assigned
block/ataflop: use the blk_cleanup_disk() helper
block/ataflop: add registration bool before calling del_gendisk()
block/ataflop: provide a helper for cleanup up an atari disk
ataflop: remove ataflop_probe_lock mutex
PCI: Do not enable AtomicOps on VFs
cpufreq: intel_pstate: Clear HWP desired on suspend/shutdown and offline
net: phy: fix duplex out of sync problem while changing settings
block: fix device_add_disk() kobject_create_and_add() error handling
drm/ttm: remove ttm_bo_vm_insert_huge()
bonding: Fix a use-after-free problem when bond_sysfs_slave_add() failed
octeontx2-pf: select CONFIG_NET_DEVLINK
ALSA: memalloc: Catch call with NULL snd_dma_buffer pointer
mfd: core: Add missing of_node_put for loop iteration
mfd: cpcap: Add SPI device ID table
mfd: sprd: Add SPI device ID table
mfd: altera-sysmgr: Fix a mistake caused by resource_size conversion
ACPI: PM: Fix device wakeup power reference counting error
libbpf: Fix lookup_and_delete_elem_flags error reporting
selftests/bpf/xdp_redirect_multi: Put the logs to tmp folder
selftests/bpf/xdp_redirect_multi: Use arping to accurate the arp number
selftests/bpf/xdp_redirect_multi: Give tcpdump a chance to terminate cleanly
selftests/bpf/xdp_redirect_multi: Limit the tests in netns
drm: fb_helper: improve CONFIG_FB dependency
Revert "drm/imx: Annotate dma-fence critical section in commit path"
drm/amdgpu/powerplay: fix sysfs_emit/sysfs_emit_at handling
can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path
can: mcp251xfd: mcp251xfd_chip_start(): fix error handling for mcp251xfd_chip_rx_int_enable()
mm/zsmalloc.c: close race window between zs_pool_dec_isolated() and zs_unregister_migration()
zram: off by one in read_block_state()
perf bpf: Add missing free to bpf_event__print_bpf_prog_info()
llc: fix out-of-bound array index in llc_sk_dev_hash()
nfc: pn533: Fix double free when pn533_fill_fragment_skbs() fails
litex_liteeth: Fix a double free in the remove function
arm64: arm64_ftr_reg->name may not be a human-readable string
arm64: pgtable: make __pte_to_phys/__phys_to_pte_val inline functions
bpf, sockmap: Remove unhash handler for BPF sockmap usage
bpf, sockmap: Fix race in ingress receive verdict with redirect to self
bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding
bpf, sockmap: sk_skb data_end access incorrect when src_reg = dst_reg
dmaengine: stm32-dma: fix burst in case of unaligned memory address
dmaengine: stm32-dma: avoid 64-bit division in stm32_dma_get_max_width
gve: Fix off by one in gve_tx_timeout()
drm/i915/fb: Fix rounding error in subsampled plane size calculation
init: make unknown command line param message clearer
seq_file: fix passing wrong private data
drm/amdgpu: fix uvd crash on Polaris12 during driver unloading
net: dsa: mv88e6xxx: Don't support >1G speeds on 6191X on ports other than 10
net/sched: sch_taprio: fix undefined behavior in ktime_mono_to_any
net: hns3: fix ROCE base interrupt vector initialization bug
net: hns3: fix pfc packet number incorrect after querying pfc parameters
net: hns3: fix kernel crash when unload VF while it is being reset
net: hns3: allow configure ETS bandwidth of all TCs
net: stmmac: allow a tc-taprio base-time of zero
net: ethernet: ti: cpsw_ale: Fix access to un-initialized memory
net: marvell: mvpp2: Fix wrong SerDes reconfiguration order
vsock: prevent unnecessary refcnt inc for nonblocking connect
net/smc: fix sk_refcnt underflow on linkdown and fallback
cxgb4: fix eeprom len when diagnostics not implemented
selftests/net: udpgso_bench_rx: fix port argument
thermal: int340x: fix build on 32-bit targets
smb3: do not error on fsync when readonly
ARM: 9155/1: fix early early_iounmap()
ARM: 9156/1: drop cc-option fallbacks for architecture selection
parisc: Fix backtrace to always include init funtion names
parisc: Flush kernel data mapping in set_pte_at() when installing pte for user page
MIPS: fix duplicated slashes for Platform file path
MIPS: fix *-pkg builds for loongson2ef platform
MIPS: Fix assembly error from MIPSr2 code used within MIPS_ISA_ARCH_LEVEL
x86/mce: Add errata workaround for Skylake SKX37
PCI/MSI: Move non-mask check back into low level accessors
PCI/MSI: Destroy sysfs before freeing entries
KVM: x86: move guest_pv_has out of user_access section
posix-cpu-timers: Clear task::posix_cputimers_work in copy_process()
irqchip/sifive-plic: Fixup EOI failed when masked
f2fs: should use GFP_NOFS for directory inodes
f2fs: include non-compressed blocks in compr_written_block
f2fs: fix UAF in f2fs_available_free_memory
ceph: fix mdsmap decode when there are MDS's beyond max_mds
erofs: fix unsafe pagevec reuse of hooked pclusters
drm/i915/guc: Fix blocked context accounting
block: Hold invalidate_lock in BLKDISCARD ioctl
block: Hold invalidate_lock in BLKZEROOUT ioctl
block: Hold invalidate_lock in BLKRESETZONE ioctl
ksmbd: Fix buffer length check in fsctl_validate_negotiate_info()
ksmbd: don't need 8byte alignment for request length in ksmbd_check_message
dmaengine: ti: k3-udma: Set bchan to NULL if a channel request fail
dmaengine: ti: k3-udma: Set r/tchan or rflow to NULL if request fail
dmaengine: bestcomm: fix system boot lockups
net, neigh: Enable state migration between NUD_PERMANENT and NTF_USE
9p/net: fix missing error check in p9_check_errors
mm/filemap.c: remove bogus VM_BUG_ON
memcg: prohibit unconditional exceeding the limit of dying tasks
mm, oom: pagefault_out_of_memory: don't force global OOM for dying tasks
mm, oom: do not trigger out_of_memory from the #PF
mm, thp: lock filemap when truncating page cache
mm, thp: fix incorrect unmap behavior for private pages
mfd: dln2: Add cell for initializing DLN2 ADC
video: backlight: Drop maximum brightness override for brightness zero
bcache: fix use-after-free problem in bcache_device_free()
bcache: Revert "bcache: use bvec_virt"
PM: sleep: Avoid calling put_device() under dpm_list_mtx
s390/cpumf: cpum_cf PMU displays invalid value after hotplug remove
s390/cio: check the subchannel validity for dev_busid
s390/tape: fix timer initialization in tape_std_assign()
s390/ap: Fix hanging ioctl caused by orphaned replies
s390/cio: make ccw_device_dma_* more robust
remoteproc: elf_loader: Fix loading segment when is_iomem true
remoteproc: Fix the wrong default value of is_iomem
remoteproc: imx_rproc: Fix ignoring mapping vdev regions
remoteproc: imx_rproc: Fix rsc-table name
mtd: rawnand: fsmc: Fix use of SM ORDER
mtd: rawnand: ams-delta: Keep the driver compatible with on-die ECC engines
mtd: rawnand: xway: Keep the driver compatible with on-die ECC engines
mtd: rawnand: mpc5121: Keep the driver compatible with on-die ECC engines
mtd: rawnand: gpio: Keep the driver compatible with on-die ECC engines
mtd: rawnand: pasemi: Keep the driver compatible with on-die ECC engines
mtd: rawnand: orion: Keep the driver compatible with on-die ECC engines
mtd: rawnand: plat_nand: Keep the driver compatible with on-die ECC engines
mtd: rawnand: au1550nd: Keep the driver compatible with on-die ECC engines
powerpc/vas: Fix potential NULL pointer dereference
powerpc/bpf: Fix write protecting JIT code
powerpc/32e: Ignore ESR in instruction storage interrupt handler
powerpc/powernv/prd: Unregister OPAL_MSG_PRD2 notifier during module unload
powerpc/security: Use a mutex for interrupt exit code patching
powerpc/64s/interrupt: Fix check_return_regs_valid() false positive
powerpc/pseries/mobility: ignore ibm, platform-facilities updates
powerpc/85xx: fix timebase sync issue when CONFIG_HOTPLUG_CPU=n
drm/sun4i: Fix macros in sun8i_csc.h
PCI: Add PCI_EXP_DEVCTL_PAYLOAD_* macros
PCI: aardvark: Fix PCIe Max Payload Size setting
SUNRPC: Partial revert of commit
|
||
Rongwei Wang
|
3ea871f0d8 |
mm, thp: fix incorrect unmap behavior for private pages
commit 8468e937df1f31411d1e127fa38db064af051fe5 upstream.
When truncating pagecache on file THP, the private pages of a process
should not be unmapped mapping. This incorrect behavior on a dynamic
shared libraries which will cause related processes to happen core dump.
A simple test for a DSO (Prerequisite is the DSO mapped in file THP):
int main(int argc, char *argv[])
{
int fd;
fd = open(argv[1], O_WRONLY);
if (fd < 0) {
perror("open");
}
close(fd);
return 0;
}
The test only to open a target DSO, and do nothing. But this operation
will lead one or more process to happen core dump. This patch mainly to
fix this bug.
Link: https://lkml.kernel.org/r/20211025092134.18562-3-rongwei.wang@linux.alibaba.com
Fixes:
|
||
|
Rongwei Wang
|
fd8e972dc4 |
mm, thp: lock filemap when truncating page cache
commit 55fc0d91746759c71bc165bba62a2db64ac98e35 upstream.
Patch series "fix two bugs for file THP".
This patch (of 2):
Transparent huge page has supported read-only non-shmem files. The
file- backed THP is collapsed by khugepaged and truncated when written
(for shared libraries).
However, there is a race when multiple writers truncate the same page
cache concurrently.
In that case, subpage(s) of file THP can be revealed by find_get_entry
in truncate_inode_pages_range, which will trigger PageTail BUG_ON in
truncate_inode_page, as follows:
page:000000009e420ff2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x7ff pfn:0x50c3ff
head:0000000075ff816d order:9 compound_mapcount:0 compound_pincount:0
flags: 0x37fffe0000010815(locked|uptodate|lru|arch_1|head)
raw: 37fffe0000000000 fffffe0013108001 dead000000000122 dead000000000400
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
head: 37fffe0000010815 fffffe001066bd48 ffff000404183c20 0000000000000000
head: 0000000000000600 0000000000000000 00000001ffffffff ffff000c0345a000
page dumped because: VM_BUG_ON_PAGE(PageTail(page))
------------[ cut here ]------------
kernel BUG at mm/truncate.c:213!
Internal error: Oops - BUG: 0 [#1] SMP
Modules linked in: xfs(E) libcrc32c(E) rfkill(E) ...
CPU: 14 PID: 11394 Comm: check_madvise_d Kdump: ...
Hardware name: ECS, BIOS 0.0.0 02/06/2015
pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
Call trace:
truncate_inode_page+0x64/0x70
truncate_inode_pages_range+0x550/0x7e4
truncate_pagecache+0x58/0x80
do_dentry_open+0x1e4/0x3c0
vfs_open+0x38/0x44
do_open+0x1f0/0x310
path_openat+0x114/0x1dc
do_filp_open+0x84/0x134
do_sys_openat2+0xbc/0x164
__arm64_sys_openat+0x74/0xc0
el0_svc_common.constprop.0+0x88/0x220
do_el0_svc+0x30/0xa0
el0_svc+0x20/0x30
el0_sync_handler+0x1a4/0x1b0
el0_sync+0x180/0x1c0
Code: aa0103e0 900061e1 910ec021 9400d300 (d4210000)
This patch mainly to lock filemap when one enter truncate_pagecache(),
avoiding truncating the same page cache concurrently.
Link: https://lkml.kernel.org/r/20211025092134.18562-1-rongwei.wang@linux.alibaba.com
Link: https://lkml.kernel.org/r/20211025092134.18562-2-rongwei.wang@linux.alibaba.com
Fixes:
|
||
|
David Anderson
|
8c288004aa |
FROMLIST: Add flags option to get xattr method paired to __vfs_getxattr
Add a flag option to get xattr method that could have a bit flag of XATTR_NOSECURITY passed to it. XATTR_NOSECURITY is generally then set in the __vfs_getxattr path when called by security infrastructure. This handles the case of a union filesystem driver that is being requested by the security layer to report back the xattr data. For the use case where access is to be blocked by the security layer. The path then could be security(dentry) -> __vfs_getxattr(dentry...XATTR_NOSECURITY) -> handler->get(dentry...XATTR_NOSECURITY) -> __vfs_getxattr(lower_dentry...XATTR_NOSECURITY) -> lower_handler->get(lower_dentry...XATTR_NOSECURITY) which would report back through the chain data and success as expected, the logging security layer at the top would have the data to determine the access permissions and report back the target context that was blocked. Without the get handler flag, the path on a union filesystem would be the errant security(dentry) -> __vfs_getxattr(dentry) -> handler->get(dentry) -> vfs_getxattr(lower_dentry) -> nested -> security(lower_dentry, log off) -> lower_handler->get(lower_dentry) which would report back through the chain no data, and -EACCES. For selinux for both cases, this would translate to a correctly determined blocked access. In the first case with this change a correct avc log would be reported, in the second legacy case an incorrect avc log would be reported against an uninitialized u:object_r:unlabeled:s0 context making the logs cosmetically useless for audit2allow. This patch series is inert and is the wide-spread addition of the flags option for xattr functions, and a replacement of __vfs_getxattr with __vfs_getxattr(...XATTR_NOSECURITY). Bug: 204981027 Link: https://lore.kernel.org/lkml/20211117015806.2192263-2-dvander@google.com Change-Id: Id2c6fa6eeb2b5cca5a11e0cd02a3fbf2a5fcbef4 Signed-off-by: David Anderson <dvander@google.com> Signed-off-by: Mark Salyzyn <salyzyn@android.com> |
||
Alistair Delva
|
62d9cb66f6 |
ANDROID: Add filp_open_block() for zram
We currently plan to disallow use of filp_open() from drivers in GKI, however the ZRAM driver still needs it. Add a new GKI-only variant of filp_open() which only permits a block device to be opened, which can be exported instead. This keeps ZRAM working but cuts down on drivers that attempt to open and write files in kernel mode. Bug: 179220339 Bug: 205141088 Change-Id: Id696b4aaf204b0499ce0a1b6416648670236e570 Signed-off-by: Alistair Delva <adelva@google.com> |
||
Kuan-Ying Lee
|
996496b8ea |
ANDROID: syscall_check: add vendor hook for open syscall
Through this vendor hook, we can get the timing to check
current running task for the validation of its credential
and open operation.
Bug: 191291287
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Change-Id: Ia644ceb02dbc230ee1d25cad3630c2c3f908e41a
(cherry picked from commit
|
||
Jeff Layton
|
f7e33bdbd6 |
fs: remove mandatory file locking support
We added CONFIG_MANDATORY_FILE_LOCKING in 2015, and soon after turned it off in Fedora and RHEL8. Several other distros have followed suit. I've heard of one problem in all that time: Someone migrated from an older distro that supported "-o mand" to one that didn't, and the host had a fstab entry with "mand" in it which broke on reboot. They didn't actually _use_ mandatory locking so they just removed the mount option and moved on. This patch rips out mandatory locking support wholesale from the kernel, along with the Kconfig option and the Documentation file. It also changes the mount code to ignore the "mand" mount option instead of erroring out, and to throw a big, ugly warning. Signed-off-by: Jeff Layton <jlayton@kernel.org> |
||
Linus Torvalds
|
58ec9059b3 |
Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs name lookup updates from Al Viro:
"Small namei.c patch series, mostly to simplify the rules for nameidata
state. It's actually from the previous cycle - but I didn't post it
for review in time...
Changes visible outside of fs/namei.c: file_open_root() calling
conventions change, some freed bits in LOOKUP_... space"
* 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
namei: make sure nd->depth is always valid
teach set_nameidata() to handle setting the root as well
take LOOKUP_{ROOT,ROOT_GRABBED,JUMPED} out of LOOKUP_... space
switch file_open_root() to struct path
|
||
|
Linus Torvalds
|
71bd934101 |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: "190 patches. Subsystems affected by this patch series: mm (hugetlb, userfaultfd, vmscan, kconfig, proc, z3fold, zbud, ras, mempolicy, memblock, migration, thp, nommu, kconfig, madvise, memory-hotplug, zswap, zsmalloc, zram, cleanups, kfence, and hmm), procfs, sysctl, misc, core-kernel, lib, lz4, checkpatch, init, kprobes, nilfs2, hfs, signals, exec, kcov, selftests, compress/decompress, and ipc" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (190 commits) ipc/util.c: use binary search for max_idx ipc/sem.c: use READ_ONCE()/WRITE_ONCE() for use_global_lock ipc: use kmalloc for msg_queue and shmid_kernel ipc sem: use kvmalloc for sem_undo allocation lib/decompressors: remove set but not used variabled 'level' selftests/vm/pkeys: exercise x86 XSAVE init state selftests/vm/pkeys: refill shadow register after implicit kernel write selftests/vm/pkeys: handle negative sys_pkey_alloc() return code selftests/vm/pkeys: fix alloc_random_pkey() to make it really, really random kcov: add __no_sanitize_coverage to fix noinstr for all architectures exec: remove checks in __register_bimfmt() x86: signal: don't do sas_ss_reset() until we are certain that sigframe won't be abandoned hfsplus: report create_date to kstat.btime hfsplus: remove unnecessary oom message nilfs2: remove redundant continue statement in a while-loop kprobes: remove duplicated strong free_insn_page in x86 and s390 init: print out unknown kernel parameters checkpatch: do not complain about positive return values starting with EPOLL checkpatch: improve the indented label test checkpatch: scripts/spdxcheck.py now requires python3 ... |
||
Collin Fijalkovich
|
eb6ecbed0a |
mm, thp: relax the VM_DENYWRITE constraint on file-backed THPs
Transparent huge pages are supported for read-only non-shmem files, but
are only used for vmas with VM_DENYWRITE. This condition ensures that
file THPs are protected from writes while an application is running
(ETXTBSY). Any existing file THPs are then dropped from the page cache
when a file is opened for write in do_dentry_open(). Since sys_mmap
ignores MAP_DENYWRITE, this constrains the use of file THPs to vmas
produced by execve().
Systems that make heavy use of shared libraries (e.g. Android) are unable
to apply VM_DENYWRITE through the dynamic linker, preventing them from
benefiting from the resultant reduced contention on the TLB.
This patch reduces the constraint on file THPs allowing use with any
executable mapping from a file not opened for write (see
inode_is_open_for_write()). It also introduces additional conditions to
ensure that files opened for write will never be backed by file THPs.
Restricting the use of THPs to executable mappings eliminates the risk
that a read-only file later opened for write would encounter significant
latencies due to page cache truncation.
The ld linker flag '-z max-page-size=(hugepage size)' can be used to
produce executables with the necessary layout. The dynamic linker must
map these file's segments at a hugepage size aligned vma for the mapping
to be backed with THPs.
Comparison of the performance characteristics of 4KB and 2MB-backed
libraries follows; the Android dex2oat tool was used to AOT compile an
example application on a single ARM core.
4KB Pages:
==========
count event_name # count / runtime
598,995,035,942 cpu-cycles # 1.800861 GHz
81,195,620,851 raw-stall-frontend # 244.112 M/sec
347,754,466,597 iTLB-loads # 1.046 G/sec
2,970,248,900 iTLB-load-misses # 0.854122% miss rate
Total test time: 332.854998 seconds.
2MB Pages:
==========
count event_name # count / runtime
592,872,663,047 cpu-cycles # 1.800358 GHz
76,485,624,143 raw-stall-frontend # 232.261 M/sec
350,478,413,710 iTLB-loads # 1.064 G/sec
803,233,322 iTLB-load-misses # 0.229182% miss rate
Total test time: 329.826087 seconds
A check of /proc/$(pidof dex2oat64)/smaps shows THPs in use:
/apex/com.android.art/lib64/libart.so
FilePmdMapped: 4096 kB
/apex/com.android.art/lib64/libart-compiler.so
FilePmdMapped: 2048 kB
Link: https://lkml.kernel.org/r/20210406000930.3455850-1-cfijalkovich@google.com
Signed-off-by: Collin Fijalkovich <cfijalkovich@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Acked-by: Song Liu <song@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Hridya Valsaraju <hridya@google.com>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Tim Murray <timmurray@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
||
|
Christian Brauner
|
cfe80306a0 |
open: don't silently ignore unknown O-flags in openat2()
The new openat2() syscall verifies that no unknown O-flag values are
set and returns an error to userspace if they are while the older open
syscalls like open() and openat() simply ignore unknown flag values:
#define O_FLAG_CURRENTLY_INVALID (1 << 31)
struct open_how how = {
.flags = O_RDONLY | O_FLAG_CURRENTLY_INVALID,
.resolve = 0,
};
/* fails */
fd = openat2(-EBADF, "/dev/null", &how, sizeof(how));
/* succeeds */
fd = openat(-EBADF, "/dev/null", O_RDONLY | O_FLAG_CURRENTLY_INVALID);
However, openat2() silently truncates the upper 32 bits meaning:
#define O_FLAG_CURRENTLY_INVALID_LOWER32 (1 << 31)
#define O_FLAG_CURRENTLY_INVALID_UPPER32 (1 << 40)
struct open_how how_lowe32 = {
.flags = O_RDONLY | O_FLAG_CURRENTLY_INVALID_LOWER32,
};
struct open_how how_upper32 = {
.flags = O_RDONLY | O_FLAG_CURRENTLY_INVALID_UPPER32,
};
/* fails */
fd = openat2(-EBADF, "/dev/null", &how_lower32, sizeof(how_lower32));
/* succeeds */
fd = openat2(-EBADF, "/dev/null", &how_upper32, sizeof(how_upper32));
Fix this by preventing the immediate truncation in build_open_flags().
There's a snafu here though stripping FMODE_* directly from flags would
cause the upper 32 bits to be truncated as well due to integer promotion
rules since FMODE_* is unsigned int, O_* are signed ints (yuck).
In addition, struct open_flags currently defines flags to be 32 bit
which is reasonable. If we simply were to bump it to 64 bit we would
need to change a lot of code preemptively which doesn't seem worth it.
So simply add a compile-time check verifying that all currently known
O_* flags are within the 32 bit range and fail to build if they aren't
anymore.
This change shouldn't regress old open syscalls since they silently
truncate any unknown values anyway. It is a tiny semantic change for
openat2() but it is very unlikely people pass ing > 32 bit unknown flags
and the syscall is relatively new too.
Link: https://lore.kernel.org/r/20210528092417.3942079-3-brauner@kernel.org
Cc: Christoph Hellwig <hch@lst.de>
Cc: Aleksa Sarai <cyphar@cyphar.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Reported-by: Richard Guy Briggs <rgb@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Aleksa Sarai <cyphar@cyphar.com>
Reviewed-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
|
||
Al Viro
|
ffb37ca3bd |
switch file_open_root() to struct path
... and provide file_open_root_mnt(), using the root of given mount. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|
Linus Torvalds
|
7d6beb71da |
Merge tag 'idmapped-mounts-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull idmapped mounts from Christian Brauner:
"This introduces idmapped mounts which has been in the making for some
time. Simply put, different mounts can expose the same file or
directory with different ownership. This initial implementation comes
with ports for fat, ext4 and with Christoph's port for xfs with more
filesystems being actively worked on by independent people and
maintainers.
Idmapping mounts handle a wide range of long standing use-cases. Here
are just a few:
- Idmapped mounts make it possible to easily share files between
multiple users or multiple machines especially in complex
scenarios. For example, idmapped mounts will be used in the
implementation of portable home directories in
systemd-homed.service(8) where they allow users to move their home
directory to an external storage device and use it on multiple
computers where they are assigned different uids and gids. This
effectively makes it possible to assign random uids and gids at
login time.
- It is possible to share files from the host with unprivileged
containers without having to change ownership permanently through
chown(2).
- It is possible to idmap a container's rootfs and without having to
mangle every file. For example, Chromebooks use it to share the
user's Download folder with their unprivileged containers in their
Linux subsystem.
- It is possible to share files between containers with
non-overlapping idmappings.
- Filesystem that lack a proper concept of ownership such as fat can
use idmapped mounts to implement discretionary access (DAC)
permission checking.
- They allow users to efficiently changing ownership on a per-mount
basis without having to (recursively) chown(2) all files. In
contrast to chown (2) changing ownership of large sets of files is
instantenous with idmapped mounts. This is especially useful when
ownership of a whole root filesystem of a virtual machine or
container is changed. With idmapped mounts a single syscall
mount_setattr syscall will be sufficient to change the ownership of
all files.
- Idmapped mounts always take the current ownership into account as
idmappings specify what a given uid or gid is supposed to be mapped
to. This contrasts with the chown(2) syscall which cannot by itself
take the current ownership of the files it changes into account. It
simply changes the ownership to the specified uid and gid. This is
especially problematic when recursively chown(2)ing a large set of
files which is commong with the aforementioned portable home
directory and container and vm scenario.
- Idmapped mounts allow to change ownership locally, restricting it
to specific mounts, and temporarily as the ownership changes only
apply as long as the mount exists.
Several userspace projects have either already put up patches and
pull-requests for this feature or will do so should you decide to pull
this:
- systemd: In a wide variety of scenarios but especially right away
in their implementation of portable home directories.
https://systemd.io/HOME_DIRECTORY/
- container runtimes: containerd, runC, LXD:To share data between
host and unprivileged containers, unprivileged and privileged
containers, etc. The pull request for idmapped mounts support in
containerd, the default Kubernetes runtime is already up for quite
a while now: https://github.com/containerd/containerd/pull/4734
- The virtio-fs developers and several users have expressed interest
in using this feature with virtual machines once virtio-fs is
ported.
- ChromeOS: Sharing host-directories with unprivileged containers.
I've tightly synced with all those projects and all of those listed
here have also expressed their need/desire for this feature on the
mailing list. For more info on how people use this there's a bunch of
talks about this too. Here's just two recent ones:
https://www.cncf.io/wp-content/uploads/2020/12/Rootless-Containers-in-Gitpod.pdf
https://fosdem.org/2021/schedule/event/containers_idmap/
This comes with an extensive xfstests suite covering both ext4 and
xfs:
https://git.kernel.org/brauner/xfstests-dev/h/idmapped_mounts
It covers truncation, creation, opening, xattrs, vfscaps, setid
execution, setgid inheritance and more both with idmapped and
non-idmapped mounts. It already helped to discover an unrelated xfs
setgid inheritance bug which has since been fixed in mainline. It will
be sent for inclusion with the xfstests project should you decide to
merge this.
In order to support per-mount idmappings vfsmounts are marked with
user namespaces. The idmapping of the user namespace will be used to
map the ids of vfs objects when they are accessed through that mount.
By default all vfsmounts are marked with the initial user namespace.
The initial user namespace is used to indicate that a mount is not
idmapped. All operations behave as before and this is verified in the
testsuite.
Based on prior discussions we want to attach the whole user namespace
and not just a dedicated idmapping struct. This allows us to reuse all
the helpers that already exist for dealing with idmappings instead of
introducing a whole new range of helpers. In addition, if we decide in
the future that we are confident enough to enable unprivileged users
to setup idmapped mounts the permission checking can take into account
whether the caller is privileged in the user namespace the mount is
currently marked with.
The user namespace the mount will be marked with can be specified by
passing a file descriptor refering to the user namespace as an
argument to the new mount_setattr() syscall together with the new
MOUNT_ATTR_IDMAP flag. The system call follows the openat2() pattern
of extensibility.
The following conditions must be met in order to create an idmapped
mount:
- The caller must currently have the CAP_SYS_ADMIN capability in the
user namespace the underlying filesystem has been mounted in.
- The underlying filesystem must support idmapped mounts.
- The mount must not already be idmapped. This also implies that the
idmapping of a mount cannot be altered once it has been idmapped.
- The mount must be a detached/anonymous mount, i.e. it must have
been created by calling open_tree() with the OPEN_TREE_CLONE flag
and it must not already have been visible in the filesystem.
The last two points guarantee easier semantics for userspace and the
kernel and make the implementation significantly simpler.
By default vfsmounts are marked with the initial user namespace and no
behavioral or performance changes are observed.
The manpage with a detailed description can be found here:
|
||
|
Christian Brauner
|
b8b546a061 |
open: handle idmapped mounts
For core file operations such as changing directories or chrooting, determining file access, changing mode or ownership the vfs will verify that the caller is privileged over the inode. Extend the various helpers to handle idmapped mounts. If the inode is accessed through an idmapped mount map it into the mount's user namespace. Afterwards the permissions checks are identical to non-idmapped mounts. When changing file ownership we need to map the uid and gid from the mount's user namespace. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Link: https://lore.kernel.org/r/20210121131959.646623-17-christian.brauner@ubuntu.com Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Reviewed-by: James Morris <jamorris@linux.microsoft.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> |
||
|
Christian Brauner
|
643fe55a06 |
open: handle idmapped mounts in do_truncate()
When truncating files the vfs will verify that the caller is privileged over the inode. Extend it to handle idmapped mounts. If the inode is accessed through an idmapped mount it is mapped according to the mount's user namespace. Afterwards the permissions checks are identical to non-idmapped mounts. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Link: https://lore.kernel.org/r/20210121131959.646623-16-christian.brauner@ubuntu.com Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> |
||
|
Christian Brauner
|
2f221d6f7b |
attr: handle idmapped mounts
When file attributes are changed most filesystems rely on the setattr_prepare(), setattr_copy(), and notify_change() helpers for initialization and permission checking. Let them handle idmapped mounts. If the inode is accessed through an idmapped mount map it into the mount's user namespace. Afterwards the checks are identical to non-idmapped mounts. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Helpers that perform checks on the ia_uid and ia_gid fields in struct iattr assume that ia_uid and ia_gid are intended values and have already been mapped correctly at the userspace-kernelspace boundary as we already do today. If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Link: https://lore.kernel.org/r/20210121131959.646623-8-christian.brauner@ubuntu.com Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> |
||
|
Christian Brauner
|
47291baa8d |
namei: make permission helpers idmapped mount aware
The two helpers inode_permission() and generic_permission() are used by the vfs to perform basic permission checking by verifying that the caller is privileged over an inode. In order to handle idmapped mounts we extend the two helpers with an additional user namespace argument. On idmapped mounts the two helpers will make sure to map the inode according to the mount's user namespace and then peform identical permission checks to inode_permission() and generic_permission(). If the initial user namespace is passed nothing changes so non-idmapped mounts will see identical behavior as before. Link: https://lore.kernel.org/r/20210121131959.646623-6-christian.brauner@ubuntu.com Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Morris <jamorris@linux.microsoft.com> Acked-by: Serge Hallyn <serge@hallyn.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> |
||
|
Christian Brauner
|
02f92b3868 |
fs: add file and path permissions helpers
Add two simple helpers to check permissions on a file and path respectively and convert over some callers. It simplifies quite a few codepaths and also reduces the churn in later patches quite a bit. Christoph also correctly points out that this makes codepaths (e.g. ioctls) way easier to follow that would otherwise have to do more complex argument passing than necessary. Link: https://lore.kernel.org/r/20210121131959.646623-4-christian.brauner@ubuntu.com Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Suggested-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Morris <jamorris@linux.microsoft.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> |
||
Jens Axboe
|
99668f6180 |
fs: expose LOOKUP_CACHED through openat2() RESOLVE_CACHED
Now that we support non-blocking path resolution internally, expose it via openat2() in the struct open_how ->resolve flags. This allows applications using openat2() to limit path resolution to the extent that it is already cached. If the lookup cannot be satisfied in a non-blocking manner, openat2(2) will return -1/-EAGAIN. Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|
Linus Torvalds
|
faf145d6f3 |
Merge branch 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull execve updates from Eric Biederman: "This set of changes ultimately fixes the interaction of posix file lock and exec. Fundamentally most of the change is just moving where unshare_files is called during exec, and tweaking the users of files_struct so that the count of files_struct is not unnecessarily played with. Along the way fcheck and related helpers were renamed to more accurately reflect what they do. There were also many other small changes that fell out, as this is the first time in a long time much of this code has been touched. Benchmarks haven't turned up any practical issues but Al Viro has observed a possibility for a lot of pounding on task_lock. So I have some changes in progress to convert put_files_struct to always rcu free files_struct. That wasn't ready for the merge window so that will have to wait until next time" * 'exec-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (27 commits) exec: Move io_uring_task_cancel after the point of no return coredump: Document coredump code exclusively used by cell spufs file: Remove get_files_struct file: Rename __close_fd_get_file close_fd_get_file file: Replace ksys_close with close_fd file: Rename __close_fd to close_fd and remove the files parameter file: Merge __alloc_fd into alloc_fd file: In f_dupfd read RLIMIT_NOFILE once. file: Merge __fd_install into fd_install proc/fd: In fdinfo seq_show don't use get_files_struct bpf/task_iter: In task_file_seq_get_next use task_lookup_next_fd_rcu proc/fd: In proc_readfd_common use task_lookup_next_fd_rcu file: Implement task_lookup_next_fd_rcu kcmp: In get_file_raw_ptr use task_lookup_fd_rcu proc/fd: In tid_fd_mode use task_lookup_fd_rcu file: Implement task_lookup_fd_rcu file: Rename fcheck lookup_fd_rcu file: Replace fcheck_files with files_lookup_fd_rcu file: Factor files_lookup_fd_locked out of fcheck_files file: Rename __fcheck_files to files_lookup_fd_raw ... |
||
Eric W. Biederman
|
8760c909f5 |
file: Rename __close_fd to close_fd and remove the files parameter
The function __close_fd was added to support binder[1]. Now that binder has been fixed to no longer need __close_fd[2] all calls to __close_fd pass current->files. Therefore transform the files parameter into a local variable initialized to current->files, and rename __close_fd to close_fd to reflect this change, and keep it in sync with the similar changes to __alloc_fd, and __fd_install. This removes the need for callers to care about the extra care that needs to be take if anything except current->files is passed, by limiting the callers to only operation on current->files. [1] |
||
Aleksa Sarai
|
398840f8bb |
openat2: reject RESOLVE_BENEATH|RESOLVE_IN_ROOT
This was an oversight in the original implementation, as it makes no
sense to specify both scoping flags to the same openat2(2) invocation
(before this patch, the result of such an invocation was equivalent to
RESOLVE_IN_ROOT being ignored).
This is a userspace-visible ABI change, but the only user of openat2(2)
at the moment is LXC which doesn't specify both flags and so no
userspace programs will break as a result.
Fixes:
|
||
Kees Cook
|
633fb6ac39 |
exec: move S_ISREG() check earlier
The execve(2)/uselib(2) syscalls have always rejected non-regular files.
Recently, it was noticed that a deadlock was introduced when trying to
execute pipes, as the S_ISREG() test was happening too late. This was
fixed in commit
|
||
|
Linus Torvalds
|
e1ec517e18 |
Merge branch 'hch.init_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull init and set_fs() cleanups from Al Viro: "Christoph's 'getting rid of ksys_...() uses under KERNEL_DS' series" * 'hch.init_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (50 commits) init: add an init_dup helper init: add an init_utimes helper init: add an init_stat helper init: add an init_mknod helper init: add an init_mkdir helper init: add an init_symlink helper init: add an init_link helper init: add an init_eaccess helper init: add an init_chmod helper init: add an init_chown helper init: add an init_chroot helper init: add an init_chdir helper init: add an init_rmdir helper init: add an init_unlink helper init: add an init_umount helper init: add an init_mount helper init: mark create_dev as __init init: mark console_on_rootfs as __init init: initialize ramdisk_execute_command at compile time devtmpfs: refactor devtmpfsd() ... |
||
Christoph Hellwig
|
eb9d7d390e |
init: add an init_eaccess helper
Add a simple helper to check if a file exists based on kernel space file name and switch the early init code over to it. Note that this theoretically changes behavior as it always is based on the effective permissions. But during early init that doesn't make a difference. Signed-off-by: Christoph Hellwig <hch@lst.de> |
||
|
Christoph Hellwig
|
1097742efc |
init: add an init_chmod helper
Add a simple helper to chmod with a kernel space file name and switch the early init code over to it. Signed-off-by: Christoph Hellwig <hch@lst.de> |
||
|
Christoph Hellwig
|
b873498f99 |
init: add an init_chown helper
Add a simple helper to chown with a kernel space file name and switch the early init code over to it. Signed-off-by: Christoph Hellwig <hch@lst.de> |
||
|
Christoph Hellwig
|
4b7ca5014c |
init: add an init_chroot helper
Add a simple helper to chroot with a kernel space file name and switch the early init code over to it. Remove the now unused ksys_chroot. Signed-off-by: Christoph Hellwig <hch@lst.de> |
||
|
Christoph Hellwig
|
db63f1e315 |
init: add an init_chdir helper
Add a simple helper to chdir with a kernel space file name and switch the early init code over to it. Remove the now unused ksys_chdir. Signed-off-by: Christoph Hellwig <hch@lst.de> |
||
|
Christoph Hellwig
|
b25ba7c3c9 |
fs: remove ksys_fchmod
Fold it into the only remaining caller. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Christoph Hellwig
|
166e07c37c |
fs: remove ksys_open
Just open code it in the two callers. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Christoph Hellwig
|
9e96c8c0e9 |
fs: add a vfs_fchmod helper
Add a helper for struct file based chmode operations. To be used by the initramfs code soon. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Christoph Hellwig
|
c04011fe8c |
fs: add a vfs_fchown helper
Add a helper for struct file based chown operations. To be used by the initramfs code soon. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
|
Christian Brauner
|
60997c3d45 |
close_range: add CLOSE_RANGE_UNSHARE
One of the use-cases of close_range() is to drop file descriptors just before
execve(). This would usually be expressed in the sequence:
unshare(CLONE_FILES);
close_range(3, ~0U);
as pointed out by Linus it might be desirable to have this be a part of
close_range() itself under a new flag CLOSE_RANGE_UNSHARE.
This expands {dup,unshare)_fd() to take a max_fds argument that indicates the
maximum number of file descriptors to copy from the old struct files. When the
user requests that all file descriptors are supposed to be closed via
close_range(min, max) then we can cap via unshare_fd(min) and hence don't need
to do any of the heavy fput() work for everything above min.
The patch makes it so that if CLOSE_RANGE_UNSHARE is requested and we do in
fact currently share our file descriptor table we create a new private copy.
We then close all fds in the requested range and finally after we're done we
install the new fd table.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
|
||
|
Christian Brauner
|
278a5fbaed |
open: add close_range()
This adds the close_range() syscall. It allows to efficiently close a range of file descriptors up to all file descriptors of a calling task. I was contacted by FreeBSD as they wanted to have the same close_range() syscall as we proposed here. We've coordinated this and in the meantime, Kyle was fast enough to merge close_range() into FreeBSD already in April: https://reviews.freebsd.org/D21627 https://svnweb.freebsd.org/base?view=revision&revision=359836 and the current plan is to backport close_range() to FreeBSD 12.2 (cf. [2]) once its merged in Linux too. Python is in the process of switching to close_range() on FreeBSD and they are waiting on us to merge this to switch on Linux as well: https://bugs.python.org/issue38061 The syscall came up in a recent discussion around the new mount API and making new file descriptor types cloexec by default. During this discussion, Al suggested the close_range() syscall (cf. [1]). Note, a syscall in this manner has been requested by various people over time. First, it helps to close all file descriptors of an exec()ing task. This can be done safely via (quoting Al's example from [1] verbatim): /* that exec is sensitive */ unshare(CLONE_FILES); /* we don't want anything past stderr here */ close_range(3, ~0U); execve(....); The code snippet above is one way of working around the problem that file descriptors are not cloexec by default. This is aggravated by the fact that we can't just switch them over without massively regressing userspace. For a whole class of programs having an in-kernel method of closing all file descriptors is very helpful (e.g. demons, service managers, programming language standard libraries, container managers etc.). (Please note, unshare(CLONE_FILES) should only be needed if the calling task is multi-threaded and shares the file descriptor table with another thread in which case two threads could race with one thread allocating file descriptors and the other one closing them via close_range(). For the general case close_range() before the execve() is sufficient.) Second, it allows userspace to avoid implementing closing all file descriptors by parsing through /proc/<pid>/fd/* and calling close() on each file descriptor. From looking at various large(ish) userspace code bases this or similar patterns are very common in: - service managers (cf. [4]) - libcs (cf. [6]) - container runtimes (cf. [5]) - programming language runtimes/standard libraries - Python (cf. [2]) - Rust (cf. [7], [8]) As Dmitry pointed out there's even a long-standing glibc bug about missing kernel support for this task (cf. [3]). In addition, the syscall will also work for tasks that do not have procfs mounted and on kernels that do not have procfs support compiled in. In such situations the only way to make sure that all file descriptors are closed is to call close() on each file descriptor up to UINT_MAX or RLIMIT_NOFILE, OPEN_MAX trickery (cf. comment [8] on Rust). The performance is striking. For good measure, comparing the following simple close_all_fds() userspace implementation that is essentially just glibc's version in [6]: static int close_all_fds(void) { int dir_fd; DIR *dir; struct dirent *direntp; dir = opendir("/proc/self/fd"); if (!dir) return -1; dir_fd = dirfd(dir); while ((direntp = readdir(dir))) { int fd; if (strcmp(direntp->d_name, ".") == 0) continue; if (strcmp(direntp->d_name, "..") == 0) continue; fd = atoi(direntp->d_name); if (fd == dir_fd || fd == 0 || fd == 1 || fd == 2) continue; close(fd); } closedir(dir); return 0; } to close_range() yields: 1. closing 4 open files: - close_all_fds(): ~280 us - close_range(): ~24 us 2. closing 1000 open files: - close_all_fds(): ~5000 us - close_range(): ~800 us close_range() is designed to allow for some flexibility. Specifically, it does not simply always close all open file descriptors of a task. Instead, callers can specify an upper bound. This is e.g. useful for scenarios where specific file descriptors are created with well-known numbers that are supposed to be excluded from getting closed. For extra paranoia close_range() comes with a flags argument. This can e.g. be used to implement extension. Once can imagine userspace wanting to stop at the first error instead of ignoring errors under certain circumstances. There might be other valid ideas in the future. In any case, a flag argument doesn't hurt and keeps us on the safe side. From an implementation side this is kept rather dumb. It saw some input from David and Jann but all nonsense is obviously my own! - Errors to close file descriptors are currently ignored. (Could be changed by setting a flag in the future if needed.) - __close_range() is a rather simplistic wrapper around __close_fd(). My reasoning behind this is based on the nature of how __close_fd() needs to release an fd. But maybe I misunderstood specifics: We take the files_lock and rcu-dereference the fdtable of the calling task, we find the entry in the fdtable, get the file and need to release files_lock before calling filp_close(). In the meantime the fdtable might have been altered so we can't just retake the spinlock and keep the old rcu-reference of the fdtable around. Instead we need to grab a fresh reference to the fdtable. If my reasoning is correct then there's really no point in fancyfying __close_range(): We just need to rcu-dereference the fdtable of the calling task once to cap the max_fd value correctly and then go on calling __close_fd() in a loop. /* References */ [1]: https://lore.kernel.org/lkml/20190516165021.GD17978@ZenIV.linux.org.uk/ [2]: |
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Linus Torvalds
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94709049fb |
Merge branch 'akpm' (patches from Andrew)
Merge updates from Andrew Morton: "A few little subsystems and a start of a lot of MM patches. Subsystems affected by this patch series: squashfs, ocfs2, parisc, vfs. With mm subsystems: slab-generic, slub, debug, pagecache, gup, swap, memcg, pagemap, memory-failure, vmalloc, kasan" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (128 commits) kasan: move kasan_report() into report.c mm/mm_init.c: report kasan-tag information stored in page->flags ubsan: entirely disable alignment checks under UBSAN_TRAP kasan: fix clang compilation warning due to stack protector x86/mm: remove vmalloc faulting mm: remove vmalloc_sync_(un)mappings() x86/mm/32: implement arch_sync_kernel_mappings() x86/mm/64: implement arch_sync_kernel_mappings() mm/ioremap: track which page-table levels were modified mm/vmalloc: track which page-table levels were modified mm: add functions to track page directory modifications s390: use __vmalloc_node in stack_alloc powerpc: use __vmalloc_node in alloc_vm_stack arm64: use __vmalloc_node in arch_alloc_vmap_stack mm: remove vmalloc_user_node_flags mm: switch the test_vmalloc module to use __vmalloc_node mm: remove __vmalloc_node_flags_caller mm: remove both instances of __vmalloc_node_flags mm: remove the prot argument to __vmalloc_node mm: remove the pgprot argument to __vmalloc ... |
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Jeff Layton
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735e4ae5ba |
vfs: track per-sb writeback errors and report them to syncfs
Patch series "vfs: have syncfs() return error when there are writeback errors", v6. Currently, syncfs does not return errors when one of the inodes fails to be written back. It will return errors based on the legacy AS_EIO and AS_ENOSPC flags when syncing out the block device fails, but that's not particularly helpful for filesystems that aren't backed by a blockdev. It's also possible for a stray sync to lose those errors. The basic idea in this set is to track writeback errors at the superblock level, so that we can quickly and easily check whether something bad happened without having to fsync each file individually. syncfs is then changed to reliably report writeback errors after they occur, much in the same fashion as fsync does now. This patch (of 2): Usually we suggest that applications call fsync when they want to ensure that all data written to the file has made it to the backing store, but that can be inefficient when there are a lot of open files. Calling syncfs on the filesystem can be more efficient in some situations, but the error reporting doesn't currently work the way most people expect. If a single inode on a filesystem reports a writeback error, syncfs won't necessarily return an error. syncfs only returns an error if __sync_blockdev fails, and on some filesystems that's a no-op. It would be better if syncfs reported an error if there were any writeback failures. Then applications could call syncfs to see if there are any errors on any open files, and could then call fsync on all of the other descriptors to figure out which one failed. This patch adds a new errseq_t to struct super_block, and has mapping_set_error also record writeback errors there. To report those errors, we also need to keep an errseq_t in struct file to act as a cursor. This patch adds a dedicated field for that purpose, which slots nicely into 4 bytes of padding at the end of struct file on x86_64. An earlier version of this patch used an O_PATH file descriptor to cue the kernel that the open file should track the superblock error and not the inode's writeback error. I think that API is just too weird though. This is simpler and should make syncfs error reporting "just work" even if someone is multiplexing fsync and syncfs on the same fds. Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Andres Freund <andres@anarazel.de> Cc: Matthew Wilcox <willy@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Cc: Dave Chinner <david@fromorbit.com> Cc: David Howells <dhowells@redhat.com> Link: http://lkml.kernel.org/r/20200428135155.19223-1-jlayton@kernel.org Link: http://lkml.kernel.org/r/20200428135155.19223-2-jlayton@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Miklos Szeredi
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c8ffd8bcdd |
vfs: add faccessat2 syscall
POSIX defines faccessat() as having a fourth "flags" argument, while the linux syscall doesn't have it. Glibc tries to emulate AT_EACCESS and AT_SYMLINK_NOFOLLOW, but AT_EACCESS emulation is broken. Add a new faccessat(2) syscall with the added flags argument and implement both flags. The value of AT_EACCESS is defined in glibc headers to be the same as AT_REMOVEDIR. Use this value for the kernel interface as well, together with the explanatory comment. Also add AT_EMPTY_PATH support, which is not documented by POSIX, but can be useful and is trivial to implement. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> |
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Miklos Szeredi
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9470451505 |
vfs: split out access_override_creds()
Split out a helper that overrides the credentials in preparation for actually doing the access check. This prepares for the next patch that optionally disables the creds override. Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> |
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Linus Torvalds
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9c577491b9 |
Merge branch 'work.dotdot1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pathwalk sanitizing from Al Viro:
"Massive pathwalk rewrite and cleanups.
Several iterations have been posted; hopefully this thing is getting
readable and understandable now. Pretty much all parts of pathname
resolutions are affected...
The branch is identical to what has sat in -next, except for commit
message in "lift all calls of step_into() out of follow_dotdot/
follow_dotdot_rcu", crediting Qian Cai for reporting the bug; only
commit message changed there."
* 'work.dotdot1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (69 commits)
lookup_open(): don't bother with fallbacks to lookup+create
atomic_open(): no need to pass struct open_flags anymore
open_last_lookups(): move complete_walk() into do_open()
open_last_lookups(): lift O_EXCL|O_CREAT handling into do_open()
open_last_lookups(): don't abuse complete_walk() when all we want is unlazy
open_last_lookups(): consolidate fsnotify_create() calls
take post-lookup part of do_last() out of loop
link_path_walk(): sample parent's i_uid and i_mode for the last component
__nd_alloc_stack(): make it return bool
reserve_stack(): switch to __nd_alloc_stack()
pick_link(): take reserving space on stack into a new helper
pick_link(): more straightforward handling of allocation failures
fold path_to_nameidata() into its only remaining caller
pick_link(): pass it struct path already with normal refcounting rules
fs/namei.c: kill follow_mount()
non-RCU analogue of the previous commit
helper for mount rootwards traversal
follow_dotdot(): be lazy about changing nd->path
follow_dotdot_rcu(): be lazy about changing nd->path
follow_dotdot{,_rcu}(): massage loops
...
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Al Viro
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d9a9f4849f |
cifs_atomic_open(): fix double-put on late allocation failure
several iterations of ->atomic_open() calling conventions ago, we
used to need fput() if ->atomic_open() failed at some point after
successful finish_open(). Now (since 2016) it's not needed -
struct file carries enough state to make fput() work regardless
of the point in struct file lifecycle and discarding it on
failure exits in open() got unified. Unfortunately, I'd missed
the fact that we had an instance of ->atomic_open() (cifs one)
that used to need that fput(), as well as the stale comment in
finish_open() demanding such late failure handling. Trivially
fixed...
Fixes:
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Al Viro
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31d1726d72 |
make build_open_flags() treat O_CREAT | O_EXCL as implying O_NOFOLLOW
O_CREAT | O_EXCL means "-EEXIST if we run into a trailing symlink". As it is, we might or might not have LOOKUP_FOLLOW in op->intent in that case - that depends upon having O_NOFOLLOW in open flags. It doesn't matter, since we won't be checking it in that case - do_last() bails out earlier. However, making sure it's not set (i.e. acting as if we had an explicit O_NOFOLLOW) makes the behaviour more explicit and allows to reorder the check for O_CREAT | O_EXCL in do_last() with the call of step_into() immediately following it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
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Jens Axboe
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35cb6d54c1 |
fs: make build_open_flags() available internally
This is a prep patch for supporting non-blocking open from io_uring. Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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Aleksa Sarai
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fddb5d430a |
open: introduce openat2(2) syscall
/* Background. */
For a very long time, extending openat(2) with new features has been
incredibly frustrating. This stems from the fact that openat(2) is
possibly the most famous counter-example to the mantra "don't silently
accept garbage from userspace" -- it doesn't check whether unknown flags
are present[1].
This means that (generally) the addition of new flags to openat(2) has
been fraught with backwards-compatibility issues (O_TMPFILE has to be
defined as __O_TMPFILE|O_DIRECTORY|[O_RDWR or O_WRONLY] to ensure old
kernels gave errors, since it's insecure to silently ignore the
flag[2]). All new security-related flags therefore have a tough road to
being added to openat(2).
Userspace also has a hard time figuring out whether a particular flag is
supported on a particular kernel. While it is now possible with
contemporary kernels (thanks to [3]), older kernels will expose unknown
flag bits through fcntl(F_GETFL). Giving a clear -EINVAL during
openat(2) time matches modern syscall designs and is far more
fool-proof.
In addition, the newly-added path resolution restriction LOOKUP flags
(which we would like to expose to user-space) don't feel related to the
pre-existing O_* flag set -- they affect all components of path lookup.
We'd therefore like to add a new flag argument.
Adding a new syscall allows us to finally fix the flag-ignoring problem,
and we can make it extensible enough so that we will hopefully never
need an openat3(2).
/* Syscall Prototype. */
/*
* open_how is an extensible structure (similar in interface to
* clone3(2) or sched_setattr(2)). The size parameter must be set to
* sizeof(struct open_how), to allow for future extensions. All future
* extensions will be appended to open_how, with their zero value
* acting as a no-op default.
*/
struct open_how { /* ... */ };
int openat2(int dfd, const char *pathname,
struct open_how *how, size_t size);
/* Description. */
The initial version of 'struct open_how' contains the following fields:
flags
Used to specify openat(2)-style flags. However, any unknown flag
bits or otherwise incorrect flag combinations (like O_PATH|O_RDWR)
will result in -EINVAL. In addition, this field is 64-bits wide to
allow for more O_ flags than currently permitted with openat(2).
mode
The file mode for O_CREAT or O_TMPFILE.
Must be set to zero if flags does not contain O_CREAT or O_TMPFILE.
resolve
Restrict path resolution (in contrast to O_* flags they affect all
path components). The current set of flags are as follows (at the
moment, all of the RESOLVE_ flags are implemented as just passing
the corresponding LOOKUP_ flag).
RESOLVE_NO_XDEV => LOOKUP_NO_XDEV
RESOLVE_NO_SYMLINKS => LOOKUP_NO_SYMLINKS
RESOLVE_NO_MAGICLINKS => LOOKUP_NO_MAGICLINKS
RESOLVE_BENEATH => LOOKUP_BENEATH
RESOLVE_IN_ROOT => LOOKUP_IN_ROOT
open_how does not contain an embedded size field, because it is of
little benefit (userspace can figure out the kernel open_how size at
runtime fairly easily without it). It also only contains u64s (even
though ->mode arguably should be a u16) to avoid having padding fields
which are never used in the future.
Note that as a result of the new how->flags handling, O_PATH|O_TMPFILE
is no longer permitted for openat(2). As far as I can tell, this has
always been a bug and appears to not be used by userspace (and I've not
seen any problems on my machines by disallowing it). If it turns out
this breaks something, we can special-case it and only permit it for
openat(2) but not openat2(2).
After input from Florian Weimer, the new open_how and flag definitions
are inside a separate header from uapi/linux/fcntl.h, to avoid problems
that glibc has with importing that header.
/* Testing. */
In a follow-up patch there are over 200 selftests which ensure that this
syscall has the correct semantics and will correctly handle several
attack scenarios.
In addition, I've written a userspace library[4] which provides
convenient wrappers around openat2(RESOLVE_IN_ROOT) (this is necessary
because no other syscalls support RESOLVE_IN_ROOT, and thus lots of care
must be taken when using RESOLVE_IN_ROOT'd file descriptors with other
syscalls). During the development of this patch, I've run numerous
verification tests using libpathrs (showing that the API is reasonably
usable by userspace).
/* Future Work. */
Additional RESOLVE_ flags have been suggested during the review period.
These can be easily implemented separately (such as blocking auto-mount
during resolution).
Furthermore, there are some other proposed changes to the openat(2)
interface (the most obvious example is magic-link hardening[5]) which
would be a good opportunity to add a way for userspace to restrict how
O_PATH file descriptors can be re-opened.
Another possible avenue of future work would be some kind of
CHECK_FIELDS[6] flag which causes the kernel to indicate to userspace
which openat2(2) flags and fields are supported by the current kernel
(to avoid userspace having to go through several guesses to figure it
out).
[1]: https://lwn.net/Articles/588444/
[2]: https://lore.kernel.org/lkml/CA+55aFyyxJL1LyXZeBsf2ypriraj5ut1XkNDsunRBqgVjZU_6Q@mail.gmail.com
[3]: commit
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