mirror of
https://github.com/a52xq-dev/kernel.git
synced 2026-10-22 18:28:11 +07:00
| SHA1 | ||
|---|---|---|
* aosp/upstream-f2fs-stable-linux-4.19.y: fscrypt: document testing with xfstests fscrypt: remove selection of CONFIG_CRYPTO_SHA256 fscrypt: remove unnecessary includes of ratelimit.h fscrypt: don't set policy for a dead directory fscrypt: decrypt only the needed blocks in __fscrypt_decrypt_bio() fscrypt: support decrypting multiple filesystem blocks per page fscrypt: introduce fscrypt_decrypt_block_inplace() fscrypt: handle blocksize < PAGE_SIZE in fscrypt_zeroout_range() fscrypt: support encrypting multiple filesystem blocks per page fscrypt: introduce fscrypt_encrypt_block_inplace() fscrypt: clean up some BUG_ON()s in block encryption/decryption fscrypt: rename fscrypt_do_page_crypto() to fscrypt_crypt_block() fscrypt: remove the "write" part of struct fscrypt_ctx fscrypt: simplify bounce page handling Change-Id: I49d9ee4b5cbb847a5fa0b736e0ff4a406b21bc1b Signed-off-by: Jaegeuk Kim <jaegeuk@google.com> 
Jaegeuk Kim
commited |
958d8d0436 | |
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Merge 4.19.73 into android-4.19
Changes in 4.19.73
ALSA: hda - Fix potential endless loop at applying quirks
ALSA: hda/realtek - Fix overridden device-specific initialization
ALSA: hda/realtek - Add quirk for HP Pavilion 15
ALSA: hda/realtek - Enable internal speaker & headset mic of ASUS UX431FL
ALSA: hda/realtek - Fix the problem of two front mics on a ThinkCentre
sched/fair: Don't assign runtime for throttled cfs_rq
drm/vmwgfx: Fix double free in vmw_recv_msg()
vhost/test: fix build for vhost test
vhost/test: fix build for vhost test - again
powerpc/tm: Fix FP/VMX unavailable exceptions inside a transaction
batman-adv: fix uninit-value in batadv_netlink_get_ifindex()
batman-adv: Only read OGM tvlv_len after buffer len check
hv_sock: Fix hang when a connection is closed
Blk-iolatency: warn on negative inflight IO counter
blk-iolatency: fix STS_AGAIN handling
{nl,mac}80211: fix interface combinations on crypto controlled devices
timekeeping: Use proper ktime_add when adding nsecs in coarse offset
selftests: fib_rule_tests: use pre-defined DEV_ADDR
x86/ftrace: Fix warning and considate ftrace_jmp_replace() and ftrace_call_replace()
powerpc/64: mark start_here_multiplatform as __ref
media: stm32-dcmi: fix irq = 0 case
arm64: dts: rockchip: enable usb-host regulators at boot on rk3328-rock64
scripts/decode_stacktrace: match basepath using shell prefix operator, not regex
riscv: remove unused variable in ftrace
nvme-fc: use separate work queue to avoid warning
clk: s2mps11: Add used attribute to s2mps11_dt_match
remoteproc: qcom: q6v5: shore up resource probe handling
modules: always page-align module section allocations
kernel/module: Fix mem leak in module_add_modinfo_attrs
drm/i915: Re-apply "Perform link quality check, unconditionally during long pulse"
media: cec/v4l2: move V4L2 specific CEC functions to V4L2
media: cec: remove cec-edid.c
scsi: qla2xxx: Move log messages before issuing command to firmware
keys: Fix the use of the C++ keyword "private" in uapi/linux/keyctl.h
Drivers: hv: kvp: Fix two "this statement may fall through" warnings
x86, hibernate: Fix nosave_regions setup for hibernation
remoteproc: qcom: q6v5-mss: add SCM probe dependency
drm/amdgpu/gfx9: Update gfx9 golden settings.
drm/amdgpu: Update gc_9_0 golden settings.
KVM: x86: hyperv: enforce vp_index < KVM_MAX_VCPUS
KVM: x86: hyperv: consistently use 'hv_vcpu' for 'struct kvm_vcpu_hv' variables
KVM: x86: hyperv: keep track of mismatched VP indexes
KVM: hyperv: define VP assist page helpers
x86/kvm/lapic: preserve gfn_to_hva_cache len on cache reinit
drm/i915: Fix intel_dp_mst_best_encoder()
drm/i915: Rename PLANE_CTL_DECOMPRESSION_ENABLE
drm/i915/gen9+: Fix initial readout for Y tiled framebuffers
drm/atomic_helper: Disallow new modesets on unregistered connectors
Drivers: hv: kvp: Fix the indentation of some "break" statements
Drivers: hv: kvp: Fix the recent regression caused by incorrect clean-up
powerplay: Respect units on max dcfclk watermark
drm/amd/pp: Fix truncated clock value when set watermark
drm/amd/dm: Understand why attaching path/tile properties are needed
ARM: davinci: da8xx: define gpio interrupts as separate resources
ARM: davinci: dm365: define gpio interrupts as separate resources
ARM: davinci: dm646x: define gpio interrupts as separate resources
ARM: davinci: dm355: define gpio interrupts as separate resources
ARM: davinci: dm644x: define gpio interrupts as separate resources
s390/zcrypt: reinit ap queue state machine during device probe
media: vim2m: use workqueue
media: vim2m: use cancel_delayed_work_sync instead of flush_schedule_work
drm/i915: Restore sane defaults for KMS on GEM error load
drm/i915: Cleanup gt powerstate from gem
KVM: PPC: Book3S HV: Fix race between kvm_unmap_hva_range and MMU mode switch
Btrfs: clean up scrub is_dev_replace parameter
Btrfs: fix deadlock with memory reclaim during scrub
btrfs: Remove extent_io_ops::fill_delalloc
btrfs: Fix error handling in btrfs_cleanup_ordered_extents
scsi: megaraid_sas: Fix combined reply queue mode detection
scsi: megaraid_sas: Add check for reset adapter bit
scsi: megaraid_sas: Use 63-bit DMA addressing
powerpc/pkeys: Fix handling of pkey state across fork()
btrfs: volumes: Make sure no dev extent is beyond device boundary
btrfs: Use real device structure to verify dev extent
media: vim2m: only cancel work if it is for right context
ARC: show_regs: lockdep: re-enable preemption
ARC: mm: do_page_fault fixes #1: relinquish mmap_sem if signal arrives while handle_mm_fault
IB/uverbs: Fix OOPs upon device disassociation
crypto: ccree - fix resume race condition on init
crypto: ccree - add missing inline qualifier
drm/vblank: Allow dynamic per-crtc max_vblank_count
drm/i915/ilk: Fix warning when reading emon_status with no output
mfd: Kconfig: Fix I2C_DESIGNWARE_PLATFORM dependencies
tpm: Fix some name collisions with drivers/char/tpm.h
bcache: replace hard coded number with BUCKET_GC_GEN_MAX
bcache: treat stale && dirty keys as bad keys
KVM: VMX: Compare only a single byte for VMCS' "launched" in vCPU-run
iio: adc: exynos-adc: Add S5PV210 variant
dt-bindings: iio: adc: exynos-adc: Add S5PV210 variant
iio: adc: exynos-adc: Use proper number of channels for Exynos4x12
mt76: fix corrupted software generated tx CCMP PN
drm/nouveau: Don't WARN_ON VCPI allocation failures
iwlwifi: fix devices with PCI Device ID 0x34F0 and 11ac RF modules
iwlwifi: add new card for 9260 series
x86/kvmclock: set offset for kvm unstable clock
spi: spi-gpio: fix SPI_CS_HIGH capability
powerpc/kvm: Save and restore host AMR/IAMR/UAMOR
mmc: renesas_sdhi: Fix card initialization failure in high speed mode
btrfs: scrub: pass fs_info to scrub_setup_ctx
btrfs: scrub: move scrub_setup_ctx allocation out of device_list_mutex
btrfs: scrub: fix circular locking dependency warning
btrfs: init csum_list before possible free
PCI: qcom: Fix error handling in runtime PM support
PCI: qcom: Don't deassert reset GPIO during probe
drm: add __user attribute to ptr_to_compat()
CIFS: Fix error paths in writeback code
CIFS: Fix leaking locked VFS cache pages in writeback retry
drm/i915: Handle vm_mmap error during I915_GEM_MMAP ioctl with WC set
drm/i915: Sanity check mmap length against object size
usb: typec: tcpm: Try PD-2.0 if sink does not respond to 3.0 source-caps
arm64: dts: stratix10: add the sysmgr-syscon property from the gmac's
IB/mlx5: Reset access mask when looping inside page fault handler
kvm: mmu: Fix overflow on kvm mmu page limit calculation
x86/kvm: move kvm_load/put_guest_xcr0 into atomic context
KVM: x86: Always use 32-bit SMRAM save state for 32-bit kernels
cifs: Fix lease buffer length error
media: i2c: tda1997x: select V4L2_FWNODE
ext4: protect journal inode's blocks using block_validity
ARM: dts: qcom: ipq4019: fix PCI range
ARM: dts: qcom: ipq4019: Fix MSI IRQ type
ARM: dts: qcom: ipq4019: enlarge PCIe BAR range
dt-bindings: mmc: Add supports-cqe property
dt-bindings: mmc: Add disable-cqe-dcmd property.
PCI: Add macro for Switchtec quirk declarations
PCI: Reset Lenovo ThinkPad P50 nvgpu at boot if necessary
dm mpath: fix missing call of path selector type->end_io
blk-mq: free hw queue's resource in hctx's release handler
mmc: sdhci-pci: Add support for Intel CML
PCI: dwc: Use devm_pci_alloc_host_bridge() to simplify code
cifs: smbd: take an array of reqeusts when sending upper layer data
dm crypt: move detailed message into debug level
signal/arc: Use force_sig_fault where appropriate
ARC: mm: fix uninitialised signal code in do_page_fault
ARC: mm: SIGSEGV userspace trying to access kernel virtual memory
drm/amdkfd: Add missing Polaris10 ID
kvm: Check irqchip mode before assign irqfd
drm/amdgpu: fix ring test failure issue during s3 in vce 3.0 (V2)
drm/amdgpu/{uvd,vcn}: fetch ring's read_ptr after alloc
Btrfs: fix race between block group removal and block group allocation
cifs: add spinlock for the openFileList to cifsInodeInfo
clk: tegra: Fix maximum audio sync clock for Tegra124/210
clk: tegra210: Fix default rates for HDA clocks
IB/hfi1: Avoid hardlockup with flushlist_lock
apparmor: reset pos on failure to unpack for various functions
scsi: target/core: Use the SECTOR_SHIFT constant
scsi: target/iblock: Fix overrun in WRITE SAME emulation
staging: wilc1000: fix error path cleanup in wilc_wlan_initialize()
scsi: zfcp: fix request object use-after-free in send path causing wrong traces
cifs: Properly handle auto disabling of serverino option
ALSA: hda - Don't resume forcibly i915 HDMI/DP codec
ceph: use ceph_evict_inode to cleanup inode's resource
KVM: x86: optimize check for valid PAT value
KVM: VMX: Always signal #GP on WRMSR to MSR_IA32_CR_PAT with bad value
KVM: VMX: Fix handling of #MC that occurs during VM-Entry
KVM: VMX: check CPUID before allowing read/write of IA32_XSS
KVM: PPC: Use ccr field in pt_regs struct embedded in vcpu struct
KVM: PPC: Book3S HV: Fix CR0 setting in TM emulation
ARM: dts: gemini: Set DIR-685 SPI CS as active low
RDMA/srp: Document srp_parse_in() arguments
RDMA/srp: Accept again source addresses that do not have a port number
btrfs: correctly validate compression type
resource: Include resource end in walk_*() interfaces
resource: Fix find_next_iomem_res() iteration issue
resource: fix locking in find_next_iomem_res()
pstore: Fix double-free in pstore_mkfile() failure path
dm thin metadata: check if in fail_io mode when setting needs_check
drm/panel: Add support for Armadeus ST0700 Adapt
ALSA: hda - Fix intermittent CORB/RIRB stall on Intel chips
powerpc/mm: Limit rma_size to 1TB when running without HV mode
iommu/iova: Remove stale cached32_node
gpio: don't WARN() on NULL descs if gpiolib is disabled
i2c: at91: disable TXRDY interrupt after sending data
i2c: at91: fix clk_offset for sama5d2
mm/migrate.c: initialize pud_entry in migrate_vma()
iio: adc: gyroadc: fix uninitialized return code
NFSv4: Fix delegation state recovery
bcache: only clear BTREE_NODE_dirty bit when it is set
bcache: add comments for mutex_lock(&b->write_lock)
bcache: fix race in btree_flush_write()
drm/i915: Make sure cdclk is high enough for DP audio on VLV/CHV
virtio/s390: fix race on airq_areas[]
drm/atomic_helper: Allow DPMS On<->Off changes for unregistered connectors
ext4: don't perform block validity checks on the journal inode
ext4: fix block validity checks for journal inodes using indirect blocks
ext4: unsigned int compared against zero
PCI: Reset both NVIDIA GPU and HDA in ThinkPad P50 workaround
powerpc/tm: Remove msr_tm_active()
powerpc/tm: Fix restoring FP/VMX facility incorrectly on interrupts
vhost: make sure log_num < in_num
Linux 4.19.73
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I7bc57825aeb36759bb8e8726888da9af06392c09
Greg Kroah-Hartman
commited |
8ca5759502 | |
[ Upstream commit ffe0bbabb0cffceceae07484fde1ec2a63b1537c ] If gpiolib is disabled, we use the inline stubs from gpio/consumer.h instead of regular definitions of GPIO API. The stubs for 'optional' variants of gpiod_get routines return NULL in this case as if the relevant GPIO wasn't found. This is correct so far. Calling other (non-gpio_get) stubs from this header triggers a warning because the GPIO descriptor couldn't have been requested. The warning however is unconditional (WARN_ON(1)) and is emitted even if the passed descriptor pointer is NULL. We don't want to force the users of 'optional' gpio_get to check the returned pointer before calling e.g. gpiod_set_value() so let's only WARN on non-NULL descriptors. Cc: stable@vger.kernel.org Reported-by: Claus H. Stovgaard <cst@phaseone.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
Bartosz Golaszewski
authored and
 Greg Kroah-Hartman
commited |
c9c90711ee | |
[ Upstream commit 5de719e3d01b4abe0de0d7b857148a880ff2a90b ] After commit 
Yufen Yu
authored and
Greg Kroah-Hartman
commited |
69409854ba | |
upstream commit 594cc251fdd0 ("make 'user_access_begin()' do 'access_ok()'")
Originally, the rule used to be that you'd have to do access_ok()
separately, and then user_access_begin() before actually doing the
direct (optimized) user access.
But experience has shown that people then decide not to do access_ok()
at all, and instead rely on it being implied by other operations or
similar. Which makes it very hard to verify that the access has
actually been range-checked.
If you use the unsafe direct user accesses, hardware features (either
SMAP - Supervisor Mode Access Protection - on x86, or PAN - Privileged
Access Never - on ARM) do force you to use user_access_begin(). But
nothing really forces the range check.
By putting the range check into user_access_begin(), we actually force
people to do the right thing (tm), and the range check vill be visible
near the actual accesses. We have way too long a history of people
trying to avoid them.
Bug: 135368228
Change-Id: I4ca0e4566ea080fa148c5e768bb1a0b6f7201c01
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds
authored and
 Alistair Delva
commited |
ac351de9dd | |
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Greg Kroah-Hartman
commited |
5fc4dfdee6 | |
[ Upstream commit 5c498950f730aa17c5f8a2cdcb903524e4002ed2 ] Signed-off-by: Luis Henriques <lhenriques@suse.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
Luis Henriques
authored and
Greg Kroah-Hartman
commited |
0f134f6e72 | |
[ Upstream commit 68e03b85474a51ec1921b4d13204782594ef7223 ]
when do randbuilding, I got this error:
In file included from drivers/hwmon/pmbus/ucd9000.c:19:0:
./include/linux/gpio/driver.h:576:1: error: redefinition of gpiochip_add_pin_range
gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
^~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/hwmon/pmbus/ucd9000.c:18:0:
./include/linux/gpio.h:245:1: note: previous definition of gpiochip_add_pin_range was here
gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
^~~~~~~~~~~~~~~~~~~~~~
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes:
YueHaibing
authored and
Greg Kroah-Hartman
commited |
6052090280 | |
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Merge 4.19.70 into android-4.19
Changes in 4.19.70
dmaengine: ste_dma40: fix unneeded variable warning
nvme-multipath: revalidate nvme_ns_head gendisk in nvme_validate_ns
afs: Fix the CB.ProbeUuid service handler to reply correctly
afs: Fix loop index mixup in afs_deliver_vl_get_entry_by_name_u()
fs: afs: Fix a possible null-pointer dereference in afs_put_read()
afs: Only update d_fsdata if different in afs_d_revalidate()
nvmet-loop: Flush nvme_delete_wq when removing the port
nvme: fix a possible deadlock when passthru commands sent to a multipath device
nvme-pci: Fix async probe remove race
soundwire: cadence_master: fix register definition for SLAVE_STATE
soundwire: cadence_master: fix definitions for INTSTAT0/1
auxdisplay: panel: need to delete scan_timer when misc_register fails in panel_attach
dmaengine: stm32-mdma: Fix a possible null-pointer dereference in stm32_mdma_irq_handler()
omap-dma/omap_vout_vrfb: fix off-by-one fi value
iommu/dma: Handle SG length overflow better
usb: gadget: composite: Clear "suspended" on reset/disconnect
usb: gadget: mass_storage: Fix races between fsg_disable and fsg_set_alt
xen/blkback: fix memory leaks
arm64: cpufeature: Don't treat granule sizes as strict
i2c: rcar: avoid race when unregistering slave client
i2c: emev2: avoid race when unregistering slave client
drm/ast: Fixed reboot test may cause system hanged
usb: host: fotg2: restart hcd after port reset
tools: hv: fixed Python pep8/flake8 warnings for lsvmbus
tools: hv: fix KVP and VSS daemons exit code
drm/i915: fix broadwell EU computation
watchdog: bcm2835_wdt: Fix module autoload
drm/bridge: tfp410: fix memleak in get_modes()
scsi: ufs: Fix RX_TERMINATION_FORCE_ENABLE define value
drm/tilcdc: Register cpufreq notifier after we have initialized crtc
net/tls: Fixed return value when tls_complete_pending_work() fails
net/tls: swap sk_write_space on close
net: tls, fix sk_write_space NULL write when tx disabled
ipv6/addrconf: allow adding multicast addr if IFA_F_MCAUTOJOIN is set
ipv6: Default fib6_type to RTN_UNICAST when not set
net/smc: make sure EPOLLOUT is raised
tcp: make sure EPOLLOUT wont be missed
ipv4/icmp: fix rt dst dev null pointer dereference
mm/zsmalloc.c: fix build when CONFIG_COMPACTION=n
ALSA: usb-audio: Check mixer unit bitmap yet more strictly
ALSA: line6: Fix memory leak at line6_init_pcm() error path
ALSA: hda - Fixes inverted Conexant GPIO mic mute led
ALSA: seq: Fix potential concurrent access to the deleted pool
ALSA: usb-audio: Fix invalid NULL check in snd_emuusb_set_samplerate()
ALSA: usb-audio: Add implicit fb quirk for Behringer UFX1604
kvm: x86: skip populating logical dest map if apic is not sw enabled
KVM: x86: Don't update RIP or do single-step on faulting emulation
uprobes/x86: Fix detection of 32-bit user mode
x86/apic: Do not initialize LDR and DFR for bigsmp
x86/apic: Include the LDR when clearing out APIC registers
ftrace: Fix NULL pointer dereference in t_probe_next()
ftrace: Check for successful allocation of hash
ftrace: Check for empty hash and comment the race with registering probes
usb-storage: Add new JMS567 revision to unusual_devs
USB: cdc-wdm: fix race between write and disconnect due to flag abuse
usb: hcd: use managed device resources
usb: chipidea: udc: don't do hardware access if gadget has stopped
usb: host: ohci: fix a race condition between shutdown and irq
usb: host: xhci: rcar: Fix typo in compatible string matching
USB: storage: ums-realtek: Update module parameter description for auto_delink_en
USB: storage: ums-realtek: Whitelist auto-delink support
mei: me: add Tiger Lake point LP device ID
mmc: sdhci-of-at91: add quirk for broken HS200
mmc: core: Fix init of SD cards reporting an invalid VDD range
stm class: Fix a double free of stm_source_device
intel_th: pci: Add support for another Lewisburg PCH
intel_th: pci: Add Tiger Lake support
typec: tcpm: fix a typo in the comparison of pdo_max_voltage
fsi: scom: Don't abort operations for minor errors
lib: logic_pio: Fix RCU usage
lib: logic_pio: Avoid possible overlap for unregistering regions
lib: logic_pio: Add logic_pio_unregister_range()
drm/amdgpu: Add APTX quirk for Dell Latitude 5495
drm/i915: Don't deballoon unused ggtt drm_mm_node in linux guest
drm/i915: Call dma_set_max_seg_size() in i915_driver_hw_probe()
bus: hisi_lpc: Unregister logical PIO range to avoid potential use-after-free
bus: hisi_lpc: Add .remove method to avoid driver unbind crash
VMCI: Release resource if the work is already queued
crypto: ccp - Ignore unconfigured CCP device on suspend/resume
Revert "cfg80211: fix processing world regdomain when non modular"
mac80211: fix possible sta leak
mac80211: Don't memset RXCB prior to PAE intercept
mac80211: Correctly set noencrypt for PAE frames
KVM: PPC: Book3S: Fix incorrect guest-to-user-translation error handling
KVM: arm/arm64: vgic: Fix potential deadlock when ap_list is long
KVM: arm/arm64: vgic-v2: Handle SGI bits in GICD_I{S,C}PENDR0 as WI
NFS: Clean up list moves of struct nfs_page
NFSv4/pnfs: Fix a page lock leak in nfs_pageio_resend()
NFS: Pass error information to the pgio error cleanup routine
NFS: Ensure O_DIRECT reports an error if the bytes read/written is 0
i2c: piix4: Fix port selection for AMD Family 16h Model 30h
x86/ptrace: fix up botched merge of spectrev1 fix
mt76: mt76x0u: do not reset radio on resume
Revert "ASoC: Fail card instantiation if DAI format setup fails"
Linux 4.19.70
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I35ff8a403a05a8c66d87cb4b542997e63c422288
Greg Kroah-Hartman
commited |
6b1f307bd0 | |
[ Upstream commit df3accb849607a86278a37c35e6b313635ccc48b ] Allow the caller to pass error information when cleaning up a failed I/O request so that we can conditionally take action to cancel the request altogether if the error turned out to be fatal. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
Trond Myklebust
authored and
Greg Kroah-Hartman
commited |
b5891b624b | |
[ Upstream commit 078b5fd92c4913dd367361db6c28568386077c89 ] In several places we're just moving the struct nfs_page from one list to another by first removing from the existing list, then adding to the new one. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Trond Myklebust
authored and
Greg Kroah-Hartman
commited |
57c491fd84 | |
commit b884e2de2afc68ce30f7093747378ef972dde253 upstream. Add a function to unregister a logical PIO range. Logical PIO space can still be leaked when unregistering certain LOGIC_PIO_CPU_MMIO regions, but this acceptable for now since there are no callers to unregister LOGIC_PIO_CPU_MMIO regions, and the logical PIO region allocation scheme would need significant work to improve this. Cc: stable@vger.kernel.org Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Wei Xu <xuwei5@hisilicon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
John Garry
authored and
Greg Kroah-Hartman
commited |
c4616a9b3d | |
Rename fscrypt_decrypt_page() to fscrypt_decrypt_pagecache_blocks() and redefine its behavior to decrypt all filesystem blocks in the given region of the given page, rather than assuming that the region consists of just one filesystem block. Also remove the 'inode' and 'lblk_num' parameters, since they can be retrieved from the page as it's already assumed to be a pagecache page. This is in preparation for allowing encryption on ext4 filesystems with blocksize != PAGE_SIZE. This is based on work by Chandan Rajendra. Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com> Signed-off-by: Eric Biggers <ebiggers@google.com> 
Eric Biggers
authored and
 Jaegeuk Kim
commited |
8780629b7e | |
Currently fscrypt_decrypt_page() does one of two logically distinct things depending on whether FS_CFLG_OWN_PAGES is set in the filesystem's fscrypt_operations: decrypt a pagecache page in-place, or decrypt a filesystem block in-place in any page. Currently these happen to share the same implementation, but this conflates the notion of blocks and pages. It also makes it so that all callers have to provide inode and lblk_num, when fscrypt could determine these itself for pagecache pages. Therefore, move the FS_CFLG_OWN_PAGES behavior into a new function fscrypt_decrypt_block_inplace(). This mirrors fscrypt_encrypt_block_inplace(). This is in preparation for allowing encryption on ext4 filesystems with blocksize != PAGE_SIZE. Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com> Signed-off-by: Eric Biggers <ebiggers@google.com>
Eric Biggers
authored and
Jaegeuk Kim
commited |
4582236bb4 | |
Rename fscrypt_encrypt_page() to fscrypt_encrypt_pagecache_blocks() and redefine its behavior to encrypt all filesystem blocks from the given region of the given page, rather than assuming that the region consists of just one filesystem block. Also remove the 'inode' and 'lblk_num' parameters, since they can be retrieved from the page as it's already assumed to be a pagecache page. This is in preparation for allowing encryption on ext4 filesystems with blocksize != PAGE_SIZE. This is based on work by Chandan Rajendra. Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com> Signed-off-by: Eric Biggers <ebiggers@google.com>
Eric Biggers
authored and
Jaegeuk Kim
commited |
fd0e18f34d | |
fscrypt_encrypt_page() behaves very differently depending on whether the filesystem set FS_CFLG_OWN_PAGES in its fscrypt_operations. This makes the function difficult to understand and document. It also makes it so that all callers have to provide inode and lblk_num, when fscrypt could determine these itself for pagecache pages. Therefore, move the FS_CFLG_OWN_PAGES behavior into a new function fscrypt_encrypt_block_inplace(). This is in preparation for allowing encryption on ext4 filesystems with blocksize != PAGE_SIZE. Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com> Signed-off-by: Eric Biggers <ebiggers@google.com>
Eric Biggers
authored and
Jaegeuk Kim
commited |
ce7b7a207b | |
Now that fscrypt_ctx is not used for writes, remove the 'w' fields. Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com> Signed-off-by: Eric Biggers <ebiggers@google.com>
Eric Biggers
authored and
Jaegeuk Kim
commited |
d568cccb4b | |
Currently, bounce page handling for writes to encrypted files is unnecessarily complicated. A fscrypt_ctx is allocated along with each bounce page, page_private(bounce_page) points to this fscrypt_ctx, and fscrypt_ctx::w::control_page points to the original pagecache page. However, because writes don't use the fscrypt_ctx for anything else, there's no reason why page_private(bounce_page) can't just point to the original pagecache page directly. Therefore, this patch makes this change. In the process, it also cleans up the API exposed to filesystems that allows testing whether a page is a bounce page, getting the pagecache page from a bounce page, and freeing a bounce page. Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com> Signed-off-by: Eric Biggers <ebiggers@google.com>
Eric Biggers
authored and
Jaegeuk Kim
commited |
2edab9e36a | |
Upstream commit 6471384af2a6 ("mm: security: introduce init_on_alloc=1
and init_on_free=1 boot options").
Patch series "add init_on_alloc/init_on_free boot options", v10.
Provide init_on_alloc and init_on_free boot options.
These are aimed at preventing possible information leaks and making the
control-flow bugs that depend on uninitialized values more deterministic.
Enabling either of the options guarantees that the memory returned by the
page allocator and SL[AU]B is initialized with zeroes. SLOB allocator
isn't supported at the moment, as its emulation of kmem caches complicates
handling of SLAB_TYPESAFE_BY_RCU caches correctly.
Enabling init_on_free also guarantees that pages and heap objects are
initialized right after they're freed, so it won't be possible to access
stale data by using a dangling pointer.
As suggested by Michal Hocko, right now we don't let the heap users to
disable initialization for certain allocations. There's not enough
evidence that doing so can speed up real-life cases, and introducing ways
to opt-out may result in things going out of control.
This patch (of 2):
The new options are needed to prevent possible information leaks and make
control-flow bugs that depend on uninitialized values more deterministic.
This is expected to be on-by-default on Android and Chrome OS. And it
gives the opportunity for anyone else to use it under distros too via the
boot args. (The init_on_free feature is regularly requested by folks
where memory forensics is included in their threat models.)
init_on_alloc=1 makes the kernel initialize newly allocated pages and heap
objects with zeroes. Initialization is done at allocation time at the
places where checks for __GFP_ZERO are performed.
init_on_free=1 makes the kernel initialize freed pages and heap objects
with zeroes upon their deletion. This helps to ensure sensitive data
doesn't leak via use-after-free accesses.
Both init_on_alloc=1 and init_on_free=1 guarantee that the allocator
returns zeroed memory. The two exceptions are slab caches with
constructors and SLAB_TYPESAFE_BY_RCU flag. Those are never
zero-initialized to preserve their semantics.
Both init_on_alloc and init_on_free default to zero, but those defaults
can be overridden with CONFIG_INIT_ON_ALLOC_DEFAULT_ON and
CONFIG_INIT_ON_FREE_DEFAULT_ON.
If either SLUB poisoning or page poisoning is enabled, those options take
precedence over init_on_alloc and init_on_free: initialization is only
applied to unpoisoned allocations.
Slowdown for the new features compared to init_on_free=0, init_on_alloc=0:
hackbench, init_on_free=1: +7.62% sys time (st.err 0.74%)
hackbench, init_on_alloc=1: +7.75% sys time (st.err 2.14%)
Linux build with -j12, init_on_free=1: +8.38% wall time (st.err 0.39%)
Linux build with -j12, init_on_free=1: +24.42% sys time (st.err 0.52%)
Linux build with -j12, init_on_alloc=1: -0.13% wall time (st.err 0.42%)
Linux build with -j12, init_on_alloc=1: +0.57% sys time (st.err 0.40%)
The slowdown for init_on_free=0, init_on_alloc=0 compared to the baseline
is within the standard error.
The new features are also going to pave the way for hardware memory
tagging (e.g. arm64's MTE), which will require both on_alloc and on_free
hooks to set the tags for heap objects. With MTE, tagging will have the
same cost as memory initialization.
Although init_on_free is rather costly, there are paranoid use-cases where
in-memory data lifetime is desired to be minimized. There are various
arguments for/against the realism of the associated threat models, but
given that we'll need the infrastructure for MTE anyway, and there are
people who want wipe-on-free behavior no matter what the performance cost,
it seems reasonable to include it in this series.
[glider@google.com: v8]
Link: http://lkml.kernel.org/r/20190626121943.131390-2-glider@google.com
[glider@google.com: v9]
Link: http://lkml.kernel.org/r/20190627130316.254309-2-glider@google.com
[glider@google.com: v10]
Link: http://lkml.kernel.org/r/20190628093131.199499-2-glider@google.com
Link: http://lkml.kernel.org/r/20190617151050.92663-2-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Michal Hocko <mhocko@suse.cz> [page and dmapool parts
Acked-by: James Morris <jamorris@linux.microsoft.com>]
Cc: Christoph Lameter <cl@linux.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Kostya Serebryany <kcc@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Sandeep Patil <sspatil@android.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Jann Horn <jannh@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change-Id: If0620a6a8aed34c21e98458c965e94f5a9dfd297
Bug: 138435492
Test: Boot cuttlefish with and without
Test: CONFIG_INIT_ON_ALLOC_DEFAULT_ON/CONFIG_INIT_ON_FREE_DEFAULT_ON
Signed-off-by: Alexander Potapenko <glider@google.com>
Alexander Potapenko
commited |
a5587d8fce | |
This patch adds complimentary DMA_BUF_SET_NAME ioctls, which lets userspace processes attach a free-form name to each buffer. This information can be extremely helpful for tracking and accounting shared buffers. For example, on Android, we know what each buffer will be used for at allocation time: GL, multimedia, camera, etc. The userspace allocator can use DMA_BUF_SET_NAME to associate that information with the buffer, so we can later give developers a breakdown of how much memory they're allocating for graphics, camera, etc. Signed-off-by: Greg Hackmann <ghackmann@google.com> Signed-off-by: Chenbo Feng <fengc@google.com> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190613223408.139221-3-fengc@google.com (cherry picked from commit bb2bb903042517b8fb17b2bc21e00512f2dcac01) Bug: 135613055 Test: run dmabufinfo_test.cpp and check the name is showed up in /proc/pid/fd Change-Id: Ib7f227b5e730c7ecfade14ad596ba3889eab1b0b 
Greg Hackmann
authored and
Alistair Delva
commited |
bf93f26d49 | |
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Fix oops by properly managing allocated structures crypto: ccp - Add support for valid authsize values less than 16 crypto: ccp - Ignore tag length when decrypting GCM ciphertext usb: usbfs: fix double-free of usb memory upon submiturb error usb: iowarrior: fix deadlock on disconnect sound: fix a memory leak bug mmc: cavium: Set the correct dma max segment size for mmc_host mmc: cavium: Add the missing dma unmap when the dma has finished. loop: set PF_MEMALLOC_NOIO for the worker thread Input: usbtouchscreen - initialize PM mutex before using it Input: elantech - enable SMBus on new (2018+) systems Input: synaptics - enable RMI mode for HP Spectre X360 x86/mm: Check for pfn instead of page in vmalloc_sync_one() x86/mm: Sync also unmappings in vmalloc_sync_all() mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy() perf annotate: Fix s390 gap between kernel end and module start perf db-export: Fix thread__exec_comm() perf record: Fix module size on s390 x86/purgatory: Use CFLAGS_REMOVE rather than reset KBUILD_CFLAGS gfs2: gfs2_walk_metadata fix usb: host: xhci-rcar: Fix timeout in xhci_suspend() usb: yurex: Fix use-after-free in yurex_delete usb: typec: tcpm: free log buf memory when remove debug file usb: typec: tcpm: remove tcpm dir if no children usb: typec: tcpm: Add NULL check before dereferencing config usb: typec: tcpm: Ignore unsupported/unknown alternate mode requests can: rcar_canfd: fix possible IRQ storm on high load can: peak_usb: fix potential double kfree_skb() netfilter: nfnetlink: avoid deadlock due to synchronous request_module vfio-ccw: Set pa_nr to 0 if memory allocation fails for pa_iova_pfn netfilter: Fix rpfilter dropping vrf packets by mistake netfilter: conntrack: always store window size un-scaled netfilter: nft_hash: fix symhash with modulus one scripts/sphinx-pre-install: fix script for RHEL/CentOS drm/amd/display: Wait for backlight programming completion in set backlight level drm/amd/display: use encoder's engine id to find matched free audio device drm/amd/display: Fix dc_create failure handling and 666 color depths drm/amd/display: Only enable audio if speaker allocation exists drm/amd/display: Increase size of audios array iscsi_ibft: make ISCSI_IBFT dependson ACPI instead of ISCSI_IBFT_FIND nl80211: fix NL80211_HE_MAX_CAPABILITY_LEN mac80211: don't warn about CW params when not using them allocate_flower_entry: should check for null deref hwmon: (nct6775) Fix register address and added missed tolerance for nct6106 drm: silence variable 'conn' set but not used cpufreq/pasemi: fix use-after-free in pas_cpufreq_cpu_init() s390/qdio: add sanity checks to the fast-requeue path ALSA: compress: Fix regression on compressed capture streams ALSA: compress: Prevent bypasses of set_params ALSA: compress: Don't allow paritial drain operations on capture streams ALSA: compress: Be more restrictive about when a drain is allowed perf tools: Fix proper buffer size for feature processing perf probe: Avoid calling freeing routine multiple times for same pointer drbd: dynamically allocate shash descriptor ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id() nvme: fix multipath crash when ANA is deactivated ARM: davinci: fix sleep.S build error on ARMv4 ARM: dts: bcm: bcm47094: add missing #cells for mdio-bus-mux scsi: megaraid_sas: fix panic on loading firmware crashdump scsi: ibmvfc: fix WARN_ON during event pool release scsi: scsi_dh_alua: always use a 2 second delay before retrying RTPG test_firmware: fix a memory leak bug tty/ldsem, locking/rwsem: Add missing ACQUIRE to read_failed sleep loop perf/core: Fix creating kernel counters for PMUs that override event->cpu s390/dma: provide proper ARCH_ZONE_DMA_BITS value HID: sony: Fix race condition between rumble and device remove. x86/purgatory: Do not use __builtin_memcpy and __builtin_memset ALSA: usb-audio: fix a memory leak bug can: peak_usb: pcan_usb_pro: Fix info-leaks to USB devices can: peak_usb: pcan_usb_fd: Fix info-leaks to USB devices hwmon: (nct7802) Fix wrong detection of in4 presence drm/i915: Fix wrong escape clock divisor init for GLK ALSA: firewire: fix a memory leak bug ALSA: hiface: fix multiple memory leak bugs ALSA: hda - Don't override global PCM hw info flag ALSA: hda - Workaround for crackled sound on AMD controller (1022:1457) mac80211: don't WARN on short WMM parameters from AP dax: dax_layout_busy_page() should not unmap cow pages SMB3: Fix deadlock in validate negotiate hits reconnect smb3: send CAP_DFS capability during session setup NFSv4: Fix an Oops in nfs4_do_setattr KVM: Fix leak vCPU's VMCS value into other pCPU mwifiex: fix 802.11n/WPA detection iwlwifi: don't unmap as page memory that was mapped as single iwlwifi: mvm: fix an out-of-bound access iwlwifi: mvm: don't send GEO_TX_POWER_LIMIT on version < 41 iwlwifi: mvm: fix version check for GEO_TX_POWER_LIMIT support Linux 4.19.67 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I5ea813ed5ba6d1eeda51eb4031395ee3e8ba54c3
Greg Kroah-Hartman
commited |
b1e96f1650 | |
commit 17e433b54393a6269acbcb792da97791fe1592d8 upstream.
After commit d73eb57b80b (KVM: Boost vCPUs that are delivering interrupts), a
five years old bug is exposed. Running ebizzy benchmark in three 80 vCPUs VMs
on one 80 pCPUs Skylake server, a lot of rcu_sched stall warning splatting
in the VMs after stress testing:
INFO: rcu_sched detected stalls on CPUs/tasks: { 4 41 57 62 77} (detected by 15, t=60004 jiffies, g=899, c=898, q=15073)
Call Trace:
flush_tlb_mm_range+0x68/0x140
tlb_flush_mmu.part.75+0x37/0xe0
tlb_finish_mmu+0x55/0x60
zap_page_range+0x142/0x190
SyS_madvise+0x3cd/0x9c0
system_call_fastpath+0x1c/0x21
swait_active() sustains to be true before finish_swait() is called in
kvm_vcpu_block(), voluntarily preempted vCPUs are taken into account
by kvm_vcpu_on_spin() loop greatly increases the probability condition
kvm_arch_vcpu_runnable(vcpu) is checked and can be true, when APICv
is enabled the yield-candidate vCPU's VMCS RVI field leaks(by
vmx_sync_pir_to_irr()) into spinning-on-a-taken-lock vCPU's current
VMCS.
This patch fixes it by checking conservatively a subset of events.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Marc Zyngier <Marc.Zyngier@arm.com>
Cc: stable@vger.kernel.org
Fixes:
Wanpeng Li
authored and
Greg Kroah-Hartman
commited |
2bc73d9141 | |
commit 9f00baf74e4b6f79a3a3dfab44fb7bb2e797b551 upstream.
AES GCM encryption allows for authsize values of 4, 8, and 12-16 bytes.
Validate the requested authsize, and retain it to save in the request
context.
Fixes:
Gary R Hook
authored and
Greg Kroah-Hartman
commited |
30692edea3 | |
This adds the pidfd_open() syscall. It allows a caller to retrieve pollable pidfds for a process which did not get created via CLONE_PIDFD, i.e. for a process that is created via traditional fork()/clone() calls that is only referenced by a PID: int pidfd = pidfd_open(1234, 0); ret = pidfd_send_signal(pidfd, SIGSTOP, NULL, 0); With the introduction of pidfds through CLONE_PIDFD it is possible to created pidfds at process creation time. However, a lot of processes get created with traditional PID-based calls such as fork() or clone() (without CLONE_PIDFD). For these processes a caller can currently not create a pollable pidfd. This is a problem for Android's low memory killer (LMK) and service managers such as systemd. Both are examples of tools that want to make use of pidfds to get reliable notification of process exit for non-parents (pidfd polling) and race-free signal sending (pidfd_send_signal()). They intend to switch to this API for process supervision/management as soon as possible. Having no way to get pollable pidfds from PID-only processes is one of the biggest blockers for them in adopting this api. With pidfd_open() making it possible to retrieve pidfds for PID-based processes we enable them to adopt this api. In line with Arnd's recent changes to consolidate syscall numbers across architectures, I have added the pidfd_open() syscall to all architectures at the same time. Signed-off-by: Christian Brauner <christian@brauner.io> Reviewed-by: David Howells <dhowells@redhat.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Kees Cook <keescook@chromium.org> Cc: Joel Fernandes (Google) <joel@joelfernandes.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jann Horn <jannh@google.com> Cc: Andy Lutomirsky <luto@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Aleksa Sarai <cyphar@cyphar.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-api@vger.kernel.org (cherry picked from commit 32fcb426ec001cb6d5a4a195091a8486ea77e2df) Bug: 135608568 Test: test program using syscall(__NR_sys_pidfd_open,..) and poll() Change-Id: I97583cfa441a08585cbedf9a44f982c0d0ee5583 Signed-off-by: Suren Baghdasaryan <surenb@google.com> 
Christian Brauner
authored and
 Joel Fernandes (Google)
commited |
abd43bb345 | |
This patch adds polling support to pidfd. Android low memory killer (LMK) needs to know when a process dies once it is sent the kill signal. It does so by checking for the existence of /proc/pid which is both racy and slow. For example, if a PID is reused between when LMK sends a kill signal and checks for existence of the PID, since the wrong PID is now possibly checked for existence. Using the polling support, LMK will be able to get notified when a process exists in race-free and fast way, and allows the LMK to do other things (such as by polling on other fds) while awaiting the process being killed to die. For notification to polling processes, we follow the same existing mechanism in the kernel used when the parent of the task group is to be notified of a child's death (do_notify_parent). This is precisely when the tasks waiting on a poll of pidfd are also awakened in this patch. We have decided to include the waitqueue in struct pid for the following reasons: 1. The wait queue has to survive for the lifetime of the poll. Including it in task_struct would not be option in this case because the task can be reaped and destroyed before the poll returns. 2. By including the struct pid for the waitqueue means that during de_thread(), the new thread group leader automatically gets the new waitqueue/pid even though its task_struct is different. Appropriate test cases are added in the second patch to provide coverage of all the cases the patch is handling. Cc: Andy Lutomirski <luto@amacapital.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Daniel Colascione <dancol@google.com> Cc: Jann Horn <jannh@google.com> Cc: Tim Murray <timmurray@google.com> Cc: Jonathan Kowalski <bl0pbl33p@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: David Howells <dhowells@redhat.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: kernel-team@android.com Reviewed-by: Oleg Nesterov <oleg@redhat.com> Co-developed-by: Daniel Colascione <dancol@google.com> Signed-off-by: Daniel Colascione <dancol@google.com> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Christian Brauner <christian@brauner.io> (cherry picked from commit b53b0b9d9a613c418057f6cb921c2f40a6f78c24) Bug: 135608568 Test: test program using syscall(__NR_sys_pidfd_open,..) and poll() Change-Id: I0391acb666b34e33ef60a778dffdf12ed3654393 Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Joel Fernandes (Google)
commited |
b3481301f4 | |
This patchset makes it possible to retrieve pid file descriptors at process creation time by introducing the new flag CLONE_PIDFD to the clone() system call. Linus originally suggested to implement this as a new flag to clone() instead of making it a separate system call. As spotted by Linus, there is exactly one bit for clone() left. CLONE_PIDFD creates file descriptors based on the anonymous inode implementation in the kernel that will also be used to implement the new mount api. They serve as a simple opaque handle on pids. Logically, this makes it possible to interpret a pidfd differently, narrowing or widening the scope of various operations (e.g. signal sending). Thus, a pidfd cannot just refer to a tgid, but also a tid, or in theory - given appropriate flag arguments in relevant syscalls - a process group or session. A pidfd does not represent a privilege. This does not imply it cannot ever be that way but for now this is not the case. A pidfd comes with additional information in fdinfo if the kernel supports procfs. The fdinfo file contains the pid of the process in the callers pid namespace in the same format as the procfs status file, i.e. "Pid:\t%d". As suggested by Oleg, with CLONE_PIDFD the pidfd is returned in the parent_tidptr argument of clone. This has the advantage that we can give back the associated pid and the pidfd at the same time. To remove worries about missing metadata access this patchset comes with a sample program that illustrates how a combination of CLONE_PIDFD, and pidfd_send_signal() can be used to gain race-free access to process metadata through /proc/<pid>. The sample program can easily be translated into a helper that would be suitable for inclusion in libc so that users don't have to worry about writing it themselves. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Christian Brauner <christian@brauner.io> Co-developed-by: Jann Horn <jannh@google.com> Signed-off-by: Jann Horn <jannh@google.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Kees Cook <keescook@chromium.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: David Howells <dhowells@redhat.com> Cc: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> Cc: Andy Lutomirsky <luto@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Aleksa Sarai <cyphar@cyphar.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> (cherry picked from commit b3e5838252665ee4cfa76b82bdf1198dca81e5be) Bug: 135608568 Test: test program using syscall(__NR_sys_pidfd_open,..) and poll() Change-Id: I8a8f87e8fb23de0adb6d6acf2e622926b7a9f55c Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Christian Brauner
authored and
Joel Fernandes (Google)
commited |
66faab946a | |
The kill() syscall operates on process identifiers (pid). After a process
has exited its pid can be reused by another process. If a caller sends a
signal to a reused pid it will end up signaling the wrong process. This
issue has often surfaced and there has been a push to address this problem [1].
This patch uses file descriptors (fd) from proc/<pid> as stable handles on
struct pid. Even if a pid is recycled the handle will not change. The fd
can be used to send signals to the process it refers to.
Thus, the new syscall pidfd_send_signal() is introduced to solve this
problem. Instead of pids it operates on process fds (pidfd).
/* prototype and argument /*
long pidfd_send_signal(int pidfd, int sig, siginfo_t *info, unsigned int flags);
/* syscall number 424 */
The syscall number was chosen to be 424 to align with Arnd's rework in his
y2038 to minimize merge conflicts (cf. [25]).
In addition to the pidfd and signal argument it takes an additional
siginfo_t and flags argument. If the siginfo_t argument is NULL then
pidfd_send_signal() is equivalent to kill(<positive-pid>, <signal>). If it
is not NULL pidfd_send_signal() is equivalent to rt_sigqueueinfo().
The flags argument is added to allow for future extensions of this syscall.
It currently needs to be passed as 0. Failing to do so will cause EINVAL.
/* pidfd_send_signal() replaces multiple pid-based syscalls */
The pidfd_send_signal() syscall currently takes on the job of
rt_sigqueueinfo(2) and parts of the functionality of kill(2), Namely, when a
positive pid is passed to kill(2). It will however be possible to also
replace tgkill(2) and rt_tgsigqueueinfo(2) if this syscall is extended.
/* sending signals to threads (tid) and process groups (pgid) */
Specifically, the pidfd_send_signal() syscall does currently not operate on
process groups or threads. This is left for future extensions.
In order to extend the syscall to allow sending signal to threads and
process groups appropriately named flags (e.g. PIDFD_TYPE_PGID, and
PIDFD_TYPE_TID) should be added. This implies that the flags argument will
determine what is signaled and not the file descriptor itself. Put in other
words, grouping in this api is a property of the flags argument not a
property of the file descriptor (cf. [13]). Clarification for this has been
requested by Eric (cf. [19]).
When appropriate extensions through the flags argument are added then
pidfd_send_signal() can additionally replace the part of kill(2) which
operates on process groups as well as the tgkill(2) and
rt_tgsigqueueinfo(2) syscalls.
How such an extension could be implemented has been very roughly sketched
in [14], [15], and [16]. However, this should not be taken as a commitment
to a particular implementation. There might be better ways to do it.
Right now this is intentionally left out to keep this patchset as simple as
possible (cf. [4]).
/* naming */
The syscall had various names throughout iterations of this patchset:
- procfd_signal()
- procfd_send_signal()
- taskfd_send_signal()
In the last round of reviews it was pointed out that given that if the
flags argument decides the scope of the signal instead of different types
of fds it might make sense to either settle for "procfd_" or "pidfd_" as
prefix. The community was willing to accept either (cf. [17] and [18]).
Given that one developer expressed strong preference for the "pidfd_"
prefix (cf. [13]) and with other developers less opinionated about the name
we should settle for "pidfd_" to avoid further bikeshedding.
The "_send_signal" suffix was chosen to reflect the fact that the syscall
takes on the job of multiple syscalls. It is therefore intentional that the
name is not reminiscent of neither kill(2) nor rt_sigqueueinfo(2). Not the
fomer because it might imply that pidfd_send_signal() is a replacement for
kill(2), and not the latter because it is a hassle to remember the correct
spelling - especially for non-native speakers - and because it is not
descriptive enough of what the syscall actually does. The name
"pidfd_send_signal" makes it very clear that its job is to send signals.
/* zombies */
Zombies can be signaled just as any other process. No special error will be
reported since a zombie state is an unreliable state (cf. [3]). However,
this can be added as an extension through the @flags argument if the need
ever arises.
/* cross-namespace signals */
The patch currently enforces that the signaler and signalee either are in
the same pid namespace or that the signaler's pid namespace is an ancestor
of the signalee's pid namespace. This is done for the sake of simplicity
and because it is unclear to what values certain members of struct
siginfo_t would need to be set to (cf. [5], [6]).
/* compat syscalls */
It became clear that we would like to avoid adding compat syscalls
(cf. [7]). The compat syscall handling is now done in kernel/signal.c
itself by adding __copy_siginfo_from_user_generic() which lets us avoid
compat syscalls (cf. [8]). It should be noted that the addition of
__copy_siginfo_from_user_any() is caused by a bug in the original
implementation of rt_sigqueueinfo(2) (cf. 12).
With upcoming rework for syscall handling things might improve
significantly (cf. [11]) and __copy_siginfo_from_user_any() will not gain
any additional callers.
/* testing */
This patch was tested on x64 and x86.
/* userspace usage */
An asciinema recording for the basic functionality can be found under [9].
With this patch a process can be killed via:
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>
static inline int do_pidfd_send_signal(int pidfd, int sig, siginfo_t *info,
unsigned int flags)
{
#ifdef __NR_pidfd_send_signal
return syscall(__NR_pidfd_send_signal, pidfd, sig, info, flags);
#else
return -ENOSYS;
#endif
}
int main(int argc, char *argv[])
{
int fd, ret, saved_errno, sig;
if (argc < 3)
exit(EXIT_FAILURE);
fd = open(argv[1], O_DIRECTORY | O_CLOEXEC);
if (fd < 0) {
printf("%s - Failed to open \"%s\"\n", strerror(errno), argv[1]);
exit(EXIT_FAILURE);
}
sig = atoi(argv[2]);
printf("Sending signal %d to process %s\n", sig, argv[1]);
ret = do_pidfd_send_signal(fd, sig, NULL, 0);
saved_errno = errno;
close(fd);
errno = saved_errno;
if (ret < 0) {
printf("%s - Failed to send signal %d to process %s\n",
strerror(errno), sig, argv[1]);
exit(EXIT_FAILURE);
}
exit(EXIT_SUCCESS);
}
/* Q&A
* Given that it seems the same questions get asked again by people who are
* late to the party it makes sense to add a Q&A section to the commit
* message so it's hopefully easier to avoid duplicate threads.
*
* For the sake of progress please consider these arguments settled unless
* there is a new point that desperately needs to be addressed. Please make
* sure to check the links to the threads in this commit message whether
* this has not already been covered.
*/
Q-01: (Florian Weimer [20], Andrew Morton [21])
What happens when the target process has exited?
A-01: Sending the signal will fail with ESRCH (cf. [22]).
Q-02: (Andrew Morton [21])
Is the task_struct pinned by the fd?
A-02: No. A reference to struct pid is kept. struct pid - as far as I
understand - was created exactly for the reason to not require to
pin struct task_struct (cf. [22]).
Q-03: (Andrew Morton [21])
Does the entire procfs directory remain visible? Just one entry
within it?
A-03: The same thing that happens right now when you hold a file descriptor
to /proc/<pid> open (cf. [22]).
Q-04: (Andrew Morton [21])
Does the pid remain reserved?
A-04: No. This patchset guarantees a stable handle not that pids are not
recycled (cf. [22]).
Q-05: (Andrew Morton [21])
Do attempts to signal that fd return errors?
A-05: See {Q,A}-01.
Q-06: (Andrew Morton [22])
Is there a cleaner way of obtaining the fd? Another syscall perhaps.
A-06: Userspace can already trivially retrieve file descriptors from procfs
so this is something that we will need to support anyway. Hence,
there's no immediate need to add another syscalls just to make
pidfd_send_signal() not dependent on the presence of procfs. However,
adding a syscalls to get such file descriptors is planned for a
future patchset (cf. [22]).
Q-07: (Andrew Morton [21] and others)
This fd-for-a-process sounds like a handy thing and people may well
think up other uses for it in the future, probably unrelated to
signals. Are the code and the interface designed to permit such
future applications?
A-07: Yes (cf. [22]).
Q-08: (Andrew Morton [21] and others)
Now I think about it, why a new syscall? This thing is looking
rather like an ioctl?
A-08: This has been extensively discussed. It was agreed that a syscall is
preferred for a variety or reasons. Here are just a few taken from
prior threads. Syscalls are safer than ioctl()s especially when
signaling to fds. Processes are a core kernel concept so a syscall
seems more appropriate. The layout of the syscall with its four
arguments would require the addition of a custom struct for the
ioctl() thereby causing at least the same amount or even more
complexity for userspace than a simple syscall. The new syscall will
replace multiple other pid-based syscalls (see description above).
The file-descriptors-for-processes concept introduced with this
syscall will be extended with other syscalls in the future. See also
[22], [23] and various other threads already linked in here.
Q-09: (Florian Weimer [24])
What happens if you use the new interface with an O_PATH descriptor?
A-09:
pidfds opened as O_PATH fds cannot be used to send signals to a
process (cf. [2]). Signaling processes through pidfds is the
equivalent of writing to a file. Thus, this is not an operation that
operates "purely at the file descriptor level" as required by the
open(2) manpage. See also [4].
/* References */
[1]: https://lore.kernel.org/lkml/20181029221037.87724-1-dancol@google.com/
[2]: https://lore.kernel.org/lkml/874lbtjvtd.fsf@oldenburg2.str.redhat.com/
[3]: https://lore.kernel.org/lkml/20181204132604.aspfupwjgjx6fhva@brauner.io/
[4]: https://lore.kernel.org/lkml/20181203180224.fkvw4kajtbvru2ku@brauner.io/
[5]: https://lore.kernel.org/lkml/20181121213946.GA10795@mail.hallyn.com/
[6]: https://lore.kernel.org/lkml/20181120103111.etlqp7zop34v6nv4@brauner.io/
[7]: https://lore.kernel.org/lkml/36323361-90BD-41AF-AB5B-EE0D7BA02C21@amacapital.net/
[8]: https://lore.kernel.org/lkml/87tvjxp8pc.fsf@xmission.com/
[9]: https://asciinema.org/a/IQjuCHew6bnq1cr78yuMv16cy
[11]: https://lore.kernel.org/lkml/F53D6D38-3521-4C20-9034-5AF447DF62FF@amacapital.net/
[12]: https://lore.kernel.org/lkml/87zhtjn8ck.fsf@xmission.com/
[13]: https://lore.kernel.org/lkml/871s6u9z6u.fsf@xmission.com/
[14]: https://lore.kernel.org/lkml/20181206231742.xxi4ghn24z4h2qki@brauner.io/
[15]: https://lore.kernel.org/lkml/20181207003124.GA11160@mail.hallyn.com/
[16]: https://lore.kernel.org/lkml/20181207015423.4miorx43l3qhppfz@brauner.io/
[17]: https://lore.kernel.org/lkml/CAGXu5jL8PciZAXvOvCeCU3wKUEB_dU-O3q0tDw4uB_ojMvDEew@mail.gmail.com/
[18]: https://lore.kernel.org/lkml/20181206222746.GB9224@mail.hallyn.com/
[19]: https://lore.kernel.org/lkml/20181208054059.19813-1-christian@brauner.io/
[20]: https://lore.kernel.org/lkml/8736rebl9s.fsf@oldenburg.str.redhat.com/
[21]: https://lore.kernel.org/lkml/20181228152012.dbf0508c2508138efc5f2bbe@linux-foundation.org/
[22]: https://lore.kernel.org/lkml/20181228233725.722tdfgijxcssg76@brauner.io/
[23]: https://lwn.net/Articles/773459/
[24]: https://lore.kernel.org/lkml/8736rebl9s.fsf@oldenburg.str.redhat.com/
[25]: https://lore.kernel.org/lkml/CAK8P3a0ej9NcJM8wXNPbcGUyOUZYX+VLoDFdbenW3s3114oQZw@mail.gmail.com/
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Jann Horn <jannh@google.com>
Cc: Andy Lutomirsky <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Christian Brauner <christian@brauner.io>
Reviewed-by: Tycho Andersen <tycho@tycho.ws>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Serge Hallyn <serge@hallyn.com>
Acked-by: Aleksa Sarai <cyphar@cyphar.com>
(cherry picked from commit 3eb39f47934f9d5a3027fe00d906a45fe3a15fad)
Conflicts:
include/linux/proc_fs.h - trivial manual merge
include/uapi/asm-generic/unistd.h - trivial manual merge
kernel/signal.c
(1. manual merges because of 4.19 differences
2. change prepare_kill_siginfo() to use struct siginfo instead of
kernel_siginfo
3. change copy_siginfo_from_user_any() to use struct siginfo instead of
kernel_siginfo
4. change pidfd_send_signal() to use struct siginfo instead of
kernel_siginfo
5. use copy_from_user() instead of copy_siginfo_from_user() in
copy_siginfo_from_user_any())
Bug: 135608568
Test: test program using syscall(__NR_pidfd_send_signal,..) to send SIGKILL
Change-Id: I24e6298ecf036d1822f3fa6c5286984b4e195c16
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Christian Brauner
authored and
Joel Fernandes (Google)
commited |
1f27ef8d9b | |
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAl1NlswACgkQONu9yGCS aT6bJBAAhlElptL5xPWWrkZdYBVyfcat3VaeEmtO7ilHxyvhFMFOE8zIYEg/NU5s ySM1yqdYvZY1ANawzIEH3es7eXy++GBBIVcRUPBuEVG/yv4/XyeX6MQYlDn3LuzI KsTAkkkqy4LLieqZTF5cqavu1EuUkQWkPxKW1ps9O5Dv24FRmKhj+EiIoEGt43Ln 6d8vChzS+ZWNhWMJd4zP8x5ZXjUUTYlBxveRQQ9yatTbzrQdfkxyD7k6+1K8se8T m9koOVJC9LtbR7W2WbVVq4L6ik3l3LQTr592kZVKiwyVgJtlul3LvqS0hNXcQxSj pwfbz+4b8UP4aRgRbMxzSRLOkb+hUOvYR+CuGLKx827b9FQcLNAbseRsA0MlPENF jJJUQSDollhx4knbYU+8Y2V1WtDi7Dnjt5gRvCvQ6rdrJMp1mFdqRGxfsdBaR10N kU+LaSfIheEvuRoTv535NpxvPQhmEqY6NTGwMYDP1xlvu4vQbWF+HAMhCLmTWrif i5ITtxYxSZOHNy7lvR7dNTMWsLoYg0KvG/oqJo8kSLmlBPcga+VK1YlPsc6JrfEG d4ft7rMz/Cx2oeUQfiURqi/XPwyIBaU6MbovLuQkVx9CJcwgYcmdFD0HRHZIEwgk z0q965POxm3DUoJF8HjBFNUOmlaYn9JZBmrwg5aFgwCy5Kot8g0= =aeth -----END PGP SIGNATURE----- Merge 4.19.66 into android-4.19 Changes in 4.19.66 scsi: fcoe: Embed fc_rport_priv in fcoe_rport structure gcc-9: don't warn about uninitialized variable driver core: Establish order of operations for device_add and device_del via bitflag drivers/base: Introduce kill_device() libnvdimm/bus: Prevent duplicate device_unregister() calls libnvdimm/region: Register badblocks before namespaces libnvdimm/bus: Prepare the nd_ioctl() path to be re-entrant libnvdimm/bus: Fix wait_nvdimm_bus_probe_idle() ABBA deadlock HID: wacom: fix bit shift for Cintiq Companion 2 HID: Add quirk for HP X1200 PIXART OEM mouse IB: directly cast the sockaddr union to aockaddr atm: iphase: Fix Spectre v1 vulnerability bnx2x: Disable multi-cos feature. ife: error out when nla attributes are empty ip6_gre: reload ipv6h in prepare_ip6gre_xmit_ipv6 ip6_tunnel: fix possible use-after-free on xmit ipip: validate header length in ipip_tunnel_xmit mlxsw: spectrum: Fix error path in mlxsw_sp_module_init() mvpp2: fix panic on module removal mvpp2: refactor MTU change code net: bridge: delete local fdb on device init failure net: bridge: mcast: don't delete permanent entries when fast leave is enabled net: fix ifindex collision during namespace removal net/mlx5e: always initialize frag->last_in_page net/mlx5: Use reversed order when unregister devices net: phylink: Fix flow control for fixed-link net: qualcomm: rmnet: Fix incorrect UL checksum offload logic net: sched: Fix a possible null-pointer dereference in dequeue_func() net sched: update vlan action for batched events operations net: sched: use temporary variable for actions indexes net/smc: do not schedule tx_work in SMC_CLOSED state NFC: nfcmrvl: fix gpio-handling regression ocelot: Cancel delayed work before wq destruction tipc: compat: allow tipc commands without arguments tun: mark small packets as owned by the tap sock net/mlx5: Fix modify_cq_in alignment net/mlx5e: Prevent encap flow counter update async to user query r8169: don't use MSI before RTL8168d compat_ioctl: pppoe: fix PPPOEIOCSFWD handling cgroup: Call cgroup_release() before __exit_signal() cgroup: Implement css_task_iter_skip() cgroup: Include dying leaders with live threads in PROCS iterations cgroup: css_task_iter_skip()'d iterators must be advanced before accessed cgroup: Fix css_task_iter_advance_css_set() cset skip condition spi: bcm2835: Fix 3-wire mode if DMA is enabled Linux 4.19.66 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: Id33ce169af8bf14a3791040b4cf923832ce84f6c
Greg Kroah-Hartman
commited |
487e61785a | |
commit c03cd7738a83b13739f00546166969342c8ff014 upstream. CSS_TASK_ITER_PROCS currently iterates live group leaders; however, this means that a process with dying leader and live threads will be skipped. IOW, cgroup.procs might be empty while cgroup.threads isn't, which is confusing to say the least. Fix it by making cset track dying tasks and include dying leaders with live threads in PROCS iteration. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-and-tested-by: Topi Miettinen <toiwoton@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Tejun Heo
authored and
Greg Kroah-Hartman
commited |
4340d175b8 | |
commit b636fd38dc40113f853337a7d2a6885ad23b8811 upstream. When a task is moved out of a cset, task iterators pointing to the task are advanced using the normal css_task_iter_advance() call. This is fine but we'll be tracking dying tasks on csets and thus moving tasks from cset->tasks to (to be added) cset->dying_tasks. When we remove a task from cset->tasks, if we advance the iterators, they may move over to the next cset before we had the chance to add the task back on the dying list, which can allow the task to escape iteration. This patch separates out skipping from advancing. Skipping only moves the affected iterators to the next pointer rather than fully advancing it and the following advancing will recognize that the cursor has already been moved forward and do the rest of advancing. This ensures that when a task moves from one list to another in its cset, as long as it moves in the right direction, it's always visible to iteration. This doesn't cause any visible behavior changes. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tejun Heo
authored and
Greg Kroah-Hartman
commited |
370b9e6399 | |
[ Upstream commit 055d88242a6046a1ceac3167290f054c72571cd9 ]
Support for handling the PPPOEIOCSFWD ioctl in compat mode was added in
linux-2.5.69 along with hundreds of other commands, but was always broken
sincen only the structure is compatible, but the command number is not,
due to the size being sizeof(size_t), or at first sizeof(sizeof((struct
sockaddr_pppox)), which is different on 64-bit architectures.
Guillaume Nault adds:
And the implementation was broken until 2016 (see
Arnd Bergmann
authored and
Greg Kroah-Hartman
commited |
e6e9bcef12 | |
[ Upstream commit 90bb769291161cf25a818d69cf608c181654473e ]
This patch prevents a race between user invoked cached counters
query and a neighbor last usage updater.
The cached flow counter stats can be queried by calling
"mlx5_fc_query_cached" which provides the number of bytes and
packets that passed via this flow since the last time this counter
was queried.
It does so by reducting the last saved stats from the current, cached
stats and then updating the last saved stats with the cached stats.
It also provide the lastuse value for that flow.
Since "mlx5e_tc_update_neigh_used_value" needs to retrieve the
last usage time of encapsulation flows, it calls the flow counter
query method periodically and async to user queries of the flow counter
using cls_flower.
This call is causing the driver to update the last reported bytes and
packets from the cache and therefore, future user queries of the flow
stats will return lower than expected number for bytes and packets
since the last saved stats in the driver was updated async to the last
saved stats in cls_flower.
This causes wrong stats presentation of encapsulation flows to user.
Since the neighbor usage updater only needs the lastuse stats from the
cached counter, the fix is to use a dedicated lastuse query call that
returns the lastuse value without synching between the cached stats and
the last saved stats.
Fixes:
Ariel Levkovich
authored and
Greg Kroah-Hartman
commited |
0ccf47265e | |
[ Upstream commit 7a32f2962c56d9d8a836b4469855caeee8766bd4 ]
Fix modify_cq_in alignment to match the device specification.
After this fix the 'cq_umem_valid' field will be in the right offset.
Cc: <stable@vger.kernel.org> # 4.19
Fixes: bd37197554eb ("net/mlx5: Update mlx5_ifc with DEVX UID bits")
Signed-off-by: Edward Srouji <edwards@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Edward Srouji
authored and
Greg Kroah-Hartman
commited |
cd84a10792 | |
commit 00289cd87676e14913d2d8492d1ce05c4baafdae upstream.
The libnvdimm subsystem arranges for devices to be destroyed as a result
of a sysfs operation. Since device_unregister() cannot be called from
an actively running sysfs attribute of the same device libnvdimm
arranges for device_unregister() to be performed in an out-of-line async
context.
The driver core maintains a 'dead' state for coordinating its own racing
async registration / de-registration requests. Rather than add local
'dead' state tracking infrastructure to libnvdimm device objects, export
the existing state tracking via a new kill_device() helper.
The kill_device() helper simply marks the device as dead, i.e. that it
is on its way to device_del(), or returns that the device was already
dead. This can be used in advance of calling device_unregister() for
subsystems like libnvdimm that might need to handle multiple user
threads racing to delete a device.
This refactoring does not change any behavior, but it is a pre-requisite
for follow-on fixes and therefore marked for -stable.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Fixes:
Dan Williams
authored and
Greg Kroah-Hartman
commited |
c23106d427 | |
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Merge 4.19.65 into android-4.19
Changes in 4.19.65
ARM: riscpc: fix DMA
ARM: dts: rockchip: Make rk3288-veyron-minnie run at hs200
ARM: dts: rockchip: Make rk3288-veyron-mickey's emmc work again
ARM: dts: rockchip: Mark that the rk3288 timer might stop in suspend
ftrace: Enable trampoline when rec count returns back to one
dmaengine: tegra-apb: Error out if DMA_PREP_INTERRUPT flag is unset
arm64: dts: rockchip: fix isp iommu clocks and power domain
kernel/module.c: Only return -EEXIST for modules that have finished loading
firmware/psci: psci_checker: Park kthreads before stopping them
MIPS: lantiq: Fix bitfield masking
dmaengine: rcar-dmac: Reject zero-length slave DMA requests
clk: tegra210: fix PLLU and PLLU_OUT1
fs/adfs: super: fix use-after-free bug
clk: sprd: Add check for return value of sprd_clk_regmap_init()
btrfs: fix minimum number of chunk errors for DUP
btrfs: qgroup: Don't hold qgroup_ioctl_lock in btrfs_qgroup_inherit()
cifs: Fix a race condition with cifs_echo_request
ceph: fix improper use of smp_mb__before_atomic()
ceph: return -ERANGE if virtual xattr value didn't fit in buffer
ACPI: blacklist: fix clang warning for unused DMI table
scsi: zfcp: fix GCC compiler warning emitted with -Wmaybe-uninitialized
perf version: Fix segfault due to missing OPT_END()
x86: kvm: avoid constant-conversion warning
ACPI: fix false-positive -Wuninitialized warning
be2net: Signal that the device cannot transmit during reconfiguration
x86/apic: Silence -Wtype-limits compiler warnings
x86: math-emu: Hide clang warnings for 16-bit overflow
mm/cma.c: fail if fixed declaration can't be honored
lib/test_overflow.c: avoid tainting the kernel and fix wrap size
lib/test_string.c: avoid masking memset16/32/64 failures
coda: add error handling for fget
coda: fix build using bare-metal toolchain
uapi linux/coda_psdev.h: move upc_req definition from uapi to kernel side headers
drivers/rapidio/devices/rio_mport_cdev.c: NUL terminate some strings
ipc/mqueue.c: only perform resource calculation if user valid
mlxsw: spectrum_dcb: Configure DSCP map as the last rule is removed
xen/pv: Fix a boot up hang revealed by int3 self test
x86/kvm: Don't call kvm_spurious_fault() from .fixup
x86/paravirt: Fix callee-saved function ELF sizes
x86, boot: Remove multiple copy of static function sanitize_boot_params()
drm/nouveau: fix memory leak in nouveau_conn_reset()
kconfig: Clear "written" flag to avoid data loss
kbuild: initialize CLANG_FLAGS correctly in the top Makefile
Btrfs: fix incremental send failure after deduplication
Btrfs: fix race leading to fs corruption after transaction abort
mmc: dw_mmc: Fix occasional hang after tuning on eMMC
mmc: meson-mx-sdio: Fix misuse of GENMASK macro
gpiolib: fix incorrect IRQ requesting of an active-low lineevent
IB/hfi1: Fix Spectre v1 vulnerability
mtd: rawnand: micron: handle on-die "ECC-off" devices correctly
selinux: fix memory leak in policydb_init()
ALSA: hda: Fix 1-minute detection delay when i915 module is not available
mm: vmscan: check if mem cgroup is disabled or not before calling memcg slab shrinker
s390/dasd: fix endless loop after read unit address configuration
cgroup: kselftest: relax fs_spec checks
parisc: Fix build of compressed kernel even with debug enabled
drivers/perf: arm_pmu: Fix failure path in PM notifier
arm64: compat: Allow single-byte watchpoints on all addresses
arm64: cpufeature: Fix feature comparison for CTR_EL0.{CWG,ERG}
nbd: replace kill_bdev() with __invalidate_device() again
xen/swiotlb: fix condition for calling xen_destroy_contiguous_region()
IB/mlx5: Fix unreg_umr to ignore the mkey state
IB/mlx5: Use direct mkey destroy command upon UMR unreg failure
IB/mlx5: Move MRs to a kernel PD when freeing them to the MR cache
IB/mlx5: Fix clean_mr() to work in the expected order
IB/mlx5: Fix RSS Toeplitz setup to be aligned with the HW specification
IB/hfi1: Check for error on call to alloc_rsm_map_table
drm/i915/gvt: fix incorrect cache entry for guest page mapping
eeprom: at24: make spd world-readable again
ARC: enable uboot support unconditionally
objtool: Support GCC 9 cold subfunction naming scheme
gcc-9: properly declare the {pv,hv}clock_page storage
x86/vdso: Prevent segfaults due to hoisted vclock reads
scsi: mpt3sas: Use 63-bit DMA addressing on SAS35 HBA
x86/cpufeatures: Carve out CQM features retrieval
x86/cpufeatures: Combine word 11 and 12 into a new scattered features word
x86/speculation: Prepare entry code for Spectre v1 swapgs mitigations
x86/speculation: Enable Spectre v1 swapgs mitigations
x86/entry/64: Use JMP instead of JMPQ
x86/speculation/swapgs: Exclude ATOMs from speculation through SWAPGS
Documentation: Add swapgs description to the Spectre v1 documentation
Linux 4.19.65
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Iceeabdb164657e0a616db618e6aa8445d56b0dc1
Greg Kroah-Hartman
commited |
de4c70d6a9 | |
[ Upstream commit f90fb3c7e2c13ae829db2274b88b845a75038b8a ] Only users of upc_req in kernel side fs/coda/psdev.c and fs/coda/upcall.c already include linux/coda_psdev.h. Suggested by Jan Harkes <jaharkes@cs.cmu.edu> in https://lore.kernel.org/lkml/20150531111913.GA23377@cs.cmu.edu/ Fixes these include/uapi/linux/coda_psdev.h compilation errors in userspace: linux/coda_psdev.h:12:19: error: field `uc_chain' has incomplete type struct list_head uc_chain; ^ linux/coda_psdev.h:13:2: error: unknown type name `caddr_t' caddr_t uc_data; ^ linux/coda_psdev.h:14:2: error: unknown type name `u_short' u_short uc_flags; ^ linux/coda_psdev.h:15:2: error: unknown type name `u_short' u_short uc_inSize; /* Size is at most 5000 bytes */ ^ linux/coda_psdev.h:16:2: error: unknown type name `u_short' u_short uc_outSize; ^ linux/coda_psdev.h:17:2: error: unknown type name `u_short' u_short uc_opcode; /* copied from data to save lookup */ ^ linux/coda_psdev.h:19:2: error: unknown type name `wait_queue_head_t' wait_queue_head_t uc_sleep; /* process' wait queue */ ^ Link: http://lkml.kernel.org/r/9f99f5ce6a0563d5266e6cf7aa9585aac2cae971.1558117389.git.jaharkes@cs.cmu.edu Signed-off-by: Mikko Rapeli <mikko.rapeli@iki.fi> Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Colin Ian King <colin.king@canonical.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: David Howells <dhowells@redhat.com> Cc: Fabian Frederick <fabf@skynet.be> Cc: Sam Protsenko <semen.protsenko@linaro.org> Cc: Yann Droneaud <ydroneaud@opteya.com> Cc: Zhouyang Jia <jiazhouyang09@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 
Mikko Rapeli
authored and
Greg Kroah-Hartman
commited |
35ee8b8448 | |
[ Upstream commit b2a57e334086602be56b74958d9f29b955cd157f ] The kernel is self-contained project and can be built with bare-metal toolchain. But bare-metal toolchain doesn't define __linux__. Because of this u_quad_t type is not defined when using bare-metal toolchain and codafs build fails. This patch fixes it by defining u_quad_t type unconditionally. Link: http://lkml.kernel.org/r/3cbb40b0a57b6f9923a9d67b53473c0b691a3eaa.1558117389.git.jaharkes@cs.cmu.edu Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> Signed-off-by: Jan Harkes <jaharkes@cs.cmu.edu> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Colin Ian King <colin.king@canonical.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: David Howells <dhowells@redhat.com> Cc: Fabian Frederick <fabf@skynet.be> Cc: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Yann Droneaud <ydroneaud@opteya.com> Cc: Zhouyang Jia <jiazhouyang09@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> 
Sam Protsenko
authored and
Greg Kroah-Hartman
commited |
dea2ee496a | |
[ Upstream commit dfd6f9ad36368b8dbd5f5a2b2f0a4705ae69a323 ]
clang gets confused by an uninitialized variable in what looks
to it like a never executed code path:
arch/x86/kernel/acpi/boot.c:618:13: error: variable 'polarity' is uninitialized when used here [-Werror,-Wuninitialized]
polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
^~~~~~~~
arch/x86/kernel/acpi/boot.c:606:32: note: initialize the variable 'polarity' to silence this warning
int rc, irq, trigger, polarity;
^
= 0
arch/x86/kernel/acpi/boot.c:617:12: error: variable 'trigger' is uninitialized when used here [-Werror,-Wuninitialized]
trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
^~~~~~~
arch/x86/kernel/acpi/boot.c:606:22: note: initialize the variable 'trigger' to silence this warning
int rc, irq, trigger, polarity;
^
= 0
This is unfortunately a design decision in clang and won't be fixed.
Changing the acpi_get_override_irq() macro to an inline function
reliably avoids the issue.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Arnd Bergmann
authored and
Greg Kroah-Hartman
commited |
c0cca0e97c | |
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAl1GibIACgkQONu9yGCS aT7z2hAAmv8AsH9IG43m7t6zLroJVswr/9594xk7yPBQgcY3/PW2aTFBCFbsdOL4 yXcj2PSwRiq9K6qAJULrvOvncR9fIILHqzWzyXnoaZ30lR/FxaaFmuHZX/5Ix1tB e5EEE/EA49UAEjEDaMLq8g2IvibsReDxmSpnXyBJWoyRAdFIElVnMJ2+zvP/wRhF NKzQj/bj/qecCbis2lUCaVWJFZ6+P/52UbD8lvIwqR3nk2TKsGDcLU6eY3yg4KrB rEHl5T8KIPrkX3KNIEB8EcFREene+rdpZLLVe4fYwf+gOqfiFXSzZZvweauMkplq ehlVHkykvQvlsVM2tjBD379z3C4aasZDuMVNMCbAy2FlruLeBQ7gEn77mCJB9VH5 /n/mlc2yizdoowtARCLWOUMfASpdSbqu2SQ7A/3kwG7l6GrpzKSIU2nQgm+41sUZ QJVtZ3IYsPoYjnU4B3JZzgJnf3M9jcRz/3JegviqhSEbF1gaScJX0cqN8C1idN/v ZAGCJK9S20/EEEsp5jn+bq2grUehvmD4TVDfot4P+5yRYyBIhMFpbM2RpjydOpwy +x8D1Q34LYPFgZfQ0vF62vcSBhMBiJ/7j41rUeo44K+Lg00F3yCOyL6FxK6S8h6j wsD0xLbllMrhV5KRYFizb3QbCHoHYiROIJk76uLvB+Tqq2Jg9VQ= =qIi2 -----END PGP SIGNATURE----- Merge 4.19.64 into android-4.19 Changes in 4.19.64 hv_sock: Add support for delayed close vsock: correct removal of socket from the list NFS: Fix dentry revalidation on NFSv4 lookup NFS: Refactor nfs_lookup_revalidate() NFSv4: Fix lookup revalidate of regular files usb: dwc2: Disable all EP's on disconnect usb: dwc2: Fix disable all EP's on disconnect arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ binder: fix possible UAF when freeing buffer ISDN: hfcsusb: checking idx of ep configuration media: au0828: fix null dereference in error path ath10k: Change the warning message string media: cpia2_usb: first wake up, then free in disconnect media: pvrusb2: use a different format for warnings NFS: Cleanup if nfs_match_client is interrupted media: radio-raremono: change devm_k*alloc to k*alloc iommu/vt-d: Don't queue_iova() if there is no flush queue iommu/iova: Fix compilation error with !CONFIG_IOMMU_IOVA Bluetooth: hci_uart: check for missing tty operations vhost: introduce vhost_exceeds_weight() vhost_net: fix possible infinite loop vhost: vsock: add weight support vhost: scsi: add weight support sched/fair: Don't free p->numa_faults with concurrent readers sched/fair: Use RCU accessors consistently for ->numa_group /proc/<pid>/cmdline: remove all the special cases /proc/<pid>/cmdline: add back the setproctitle() special case drivers/pps/pps.c: clear offset flags in PPS_SETPARAMS ioctl Fix allyesconfig output. ceph: hold i_ceph_lock when removing caps for freeing inode block, scsi: Change the preempt-only flag into a counter scsi: core: Avoid that a kernel warning appears during system resume ip_tunnel: allow not to count pkts on tstats by setting skb's dev to NULL Linux 4.19.64 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I3e9055b677bd8ad9d5070307fae0bc765d444e9d
Greg Kroah-Hartman
commited |
844ecc4634 | |
commit cd84a62e0078dce09f4ed349bec84f86c9d54b30 upstream. The RQF_PREEMPT flag is used for three purposes: - In the SCSI core, for making sure that power management requests are executed even if a device is in the "quiesced" state. - For domain validation by SCSI drivers that use the parallel port. - In the IDE driver, for IDE preempt requests. Rename "preempt-only" into "pm-only" because the primary purpose of this mode is power management. Since the power management core may but does not have to resume a runtime suspended device before performing system-wide suspend and since a later patch will set "pm-only" mode as long as a block device is runtime suspended, make it possible to set "pm-only" mode from more than one context. Since with this change scsi_device_quiesce() is no longer idempotent, make that function return early if it is called for a quiesced queue. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ming Lei <ming.lei@redhat.com> Cc: Jianchao Wang <jianchao.w.wang@oracle.com> Cc: Johannes Thumshirn <jthumshirn@suse.de> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Bart Van Assche
authored and
Greg Kroah-Hartman
commited |
c58a650736 | |
commit cb361d8cdef69990f6b4504dc1fd9a594d983c97 upstream.
The old code used RCU annotations and accessors inconsistently for
->numa_group, which can lead to use-after-frees and NULL dereferences.
Let all accesses to ->numa_group use proper RCU helpers to prevent such
issues.
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Fixes:
Jann Horn
authored and
Greg Kroah-Hartman
commited |
a5a3915f17 | |
commit 16d51a590a8ce3befb1308e0e7ab77f3b661af33 upstream.
When going through execve(), zero out the NUMA fault statistics instead of
freeing them.
During execve, the task is reachable through procfs and the scheduler. A
concurrent /proc/*/sched reader can read data from a freed ->numa_faults
allocation (confirmed by KASAN) and write it back to userspace.
I believe that it would also be possible for a use-after-free read to occur
through a race between a NUMA fault and execve(): task_numa_fault() can
lead to task_numa_compare(), which invokes task_weight() on the currently
running task of a different CPU.
Another way to fix this would be to make ->numa_faults RCU-managed or add
extra locking, but it seems easier to wipe the NUMA fault statistics on
execve.
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Fixes:
Jann Horn
authored and
Greg Kroah-Hartman
commited |
48046e092a | |
commit 201c1db90cd643282185a00770f12f95da330eca upstream.
The stub function for !CONFIG_IOMMU_IOVA needs to be
'static inline'.
Fixes: effa467870c76 ('iommu/vt-d: Don't queue_iova() if there is no flush queue')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joerg Roedel
authored and
Greg Kroah-Hartman
commited |
3a0c22cbc5 | |
commit effa467870c7612012885df4e246bdb8ffd8e44c upstream.
Intel VT-d driver was reworked to use common deferred flushing
implementation. Previously there was one global per-cpu flush queue,
afterwards - one per domain.
Before deferring a flush, the queue should be allocated and initialized.
Currently only domains with IOMMU_DOMAIN_DMA type initialize their flush
queue. It's probably worth to init it for static or unmanaged domains
too, but it may be arguable - I'm leaving it to iommu folks.
Prevent queuing an iova flush if the domain doesn't have a queue.
The defensive check seems to be worth to keep even if queue would be
initialized for all kinds of domains. And is easy backportable.
On 4.19.43 stable kernel it has a user-visible effect: previously for
devices in si domain there were crashes, on sata devices:
BUG: spinlock bad magic on CPU#6, swapper/0/1
lock: 0xffff88844f582008, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
CPU: 6 PID: 1 Comm: swapper/0 Not tainted 4.19.43 #1
Call Trace:
<IRQ>
dump_stack+0x61/0x7e
spin_bug+0x9d/0xa3
do_raw_spin_lock+0x22/0x8e
_raw_spin_lock_irqsave+0x32/0x3a
queue_iova+0x45/0x115
intel_unmap+0x107/0x113
intel_unmap_sg+0x6b/0x76
__ata_qc_complete+0x7f/0x103
ata_qc_complete+0x9b/0x26a
ata_qc_complete_multiple+0xd0/0xe3
ahci_handle_port_interrupt+0x3ee/0x48a
ahci_handle_port_intr+0x73/0xa9
ahci_single_level_irq_intr+0x40/0x60
__handle_irq_event_percpu+0x7f/0x19a
handle_irq_event_percpu+0x32/0x72
handle_irq_event+0x38/0x56
handle_edge_irq+0x102/0x121
handle_irq+0x147/0x15c
do_IRQ+0x66/0xf2
common_interrupt+0xf/0xf
RIP: 0010:__do_softirq+0x8c/0x2df
The same for usb devices that use ehci-pci:
BUG: spinlock bad magic on CPU#0, swapper/0/1
lock: 0xffff88844f402008, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.19.43 #4
Call Trace:
<IRQ>
dump_stack+0x61/0x7e
spin_bug+0x9d/0xa3
do_raw_spin_lock+0x22/0x8e
_raw_spin_lock_irqsave+0x32/0x3a
queue_iova+0x77/0x145
intel_unmap+0x107/0x113
intel_unmap_page+0xe/0x10
usb_hcd_unmap_urb_setup_for_dma+0x53/0x9d
usb_hcd_unmap_urb_for_dma+0x17/0x100
unmap_urb_for_dma+0x22/0x24
__usb_hcd_giveback_urb+0x51/0xc3
usb_giveback_urb_bh+0x97/0xde
tasklet_action_common.isra.4+0x5f/0xa1
tasklet_action+0x2d/0x30
__do_softirq+0x138/0x2df
irq_exit+0x7d/0x8b
smp_apic_timer_interrupt+0x10f/0x151
apic_timer_interrupt+0xf/0x20
</IRQ>
RIP: 0010:_raw_spin_unlock_irqrestore+0x17/0x39
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: iommu@lists.linux-foundation.org
Cc: <stable@vger.kernel.org> # 4.14+
Fixes:
Dmitry Safonov
authored and
Greg Kroah-Hartman
commited |
4fd0eb60ba | |
* origin/upstream-f2fs-stable-linux-4.19.y: f2fs: use EINVAL for superblock with invalid magic f2fs: fix to read source block before invalidating it f2fs: remove redundant check from f2fs_setflags_common() f2fs: use generic checking function for FS_IOC_FSSETXATTR f2fs: use generic checking and prep function for FS_IOC_SETFLAGS ubifs, fscrypt: cache decrypted symlink target in ->i_link vfs: use READ_ONCE() to access ->i_link fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory fscrypt: cache decrypted symlink target in ->i_link fscrypt: fix race where ->lookup() marks plaintext dentry as ciphertext fscrypt: only set dentry_operations on ciphertext dentries fscrypt: fix race allowing rename() and link() of ciphertext dentries fscrypt: clean up and improve dentry revalidation fscrypt: use READ_ONCE() to access ->i_crypt_info fscrypt: remove WARN_ON_ONCE() when decryption fails fscrypt: drop inode argument from fscrypt_get_ctx() f2fs: improve print log in f2fs_sanity_check_ckpt() f2fs: avoid out-of-range memory access f2fs: fix to avoid long latency during umount f2fs: allow all the users to pin a file f2fs: support swap file w/ DIO f2fs: allocate blocks for pinned file f2fs: fix is_idle() check for discard type f2fs: add a rw_sem to cover quota flag changes f2fs: set SBI_NEED_FSCK for xattr corruption case f2fs: use generic EFSBADCRC/EFSCORRUPTED f2fs: Use DIV_ROUND_UP() instead of open-coding f2fs: print kernel message if filesystem is inconsistent f2fs: introduce f2fs_<level> macros to wrap f2fs_printk() f2fs: avoid get_valid_blocks() for cleanup f2fs: ioctl for removing a range from F2FS f2fs: only set project inherit bit for directory f2fs: separate f2fs i_flags from fs_flags and ext4 i_flags f2fs: Add option to limit required GC for checkpoint=disable f2fs: Fix accounting for unusable blocks f2fs: Fix root reserved on remount f2fs: Lower threshold for disable_cp_again f2fs: fix sparse warning f2fs: fix f2fs_show_options to show nodiscard mount option f2fs: add error prints for debugging mount failure f2fs: fix to do sanity check on segment bitmap of LFS curseg f2fs: add missing sysfs entries in documentation f2fs: fix to avoid deadloop if data_flush is on f2fs: always assume that the device is idle under gc_urgent f2fs: add bio cache for IPU f2fs: allow ssr block allocation during checkpoint=disable period f2fs: fix to check layout on last valid checkpoint park Change-Id: Ie910f127f574c2115e5b9a6725461ce002c267be Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Jaegeuk Kim
commited |
e6f3ddbf65 | |
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Merge 4.19.63 into android-4.19
Changes in 4.19.63
hvsock: fix epollout hang from race condition
drm/panel: simple: Fix panel_simple_dsi_probe
iio: adc: stm32-dfsdm: manage the get_irq error case
iio: adc: stm32-dfsdm: missing error case during probe
staging: vt6656: use meaningful error code during buffer allocation
usb: core: hub: Disable hub-initiated U1/U2
tty: max310x: Fix invalid baudrate divisors calculator
pinctrl: rockchip: fix leaked of_node references
tty: serial: cpm_uart - fix init when SMC is relocated
drm/amd/display: Fill prescale_params->scale for RGB565
drm/amdgpu/sriov: Need to initialize the HDP_NONSURFACE_BAStE
drm/amd/display: Disable ABM before destroy ABM struct
drm/amdkfd: Fix a potential memory leak
drm/amdkfd: Fix sdma queue map issue
drm/edid: Fix a missing-check bug in drm_load_edid_firmware()
PCI: Return error if cannot probe VF
drm/bridge: tc358767: read display_props in get_modes()
drm/bridge: sii902x: pixel clock unit is 10kHz instead of 1kHz
gpu: host1x: Increase maximum DMA segment size
drm/crc-debugfs: User irqsafe spinlock in drm_crtc_add_crc_entry
drm/crc-debugfs: Also sprinkle irqrestore over early exits
memstick: Fix error cleanup path of memstick_init
tty/serial: digicolor: Fix digicolor-usart already registered warning
tty: serial: msm_serial: avoid system lockup condition
serial: 8250: Fix TX interrupt handling condition
drm/amd/display: Always allocate initial connector state state
drm/virtio: Add memory barriers for capset cache.
phy: renesas: rcar-gen2: Fix memory leak at error paths
drm/amd/display: fix compilation error
powerpc/pseries/mobility: prevent cpu hotplug during DT update
drm/rockchip: Properly adjust to a true clock in adjusted_mode
serial: imx: fix locking in set_termios()
tty: serial_core: Set port active bit in uart_port_activate
usb: gadget: Zero ffs_io_data
mmc: sdhci: sdhci-pci-o2micro: Check if controller supports 8-bit width
powerpc/pci/of: Fix OF flags parsing for 64bit BARs
drm/msm: Depopulate platform on probe failure
serial: mctrl_gpio: Check if GPIO property exisits before requesting it
PCI: sysfs: Ignore lockdep for remove attribute
i2c: stm32f7: fix the get_irq error cases
kbuild: Add -Werror=unknown-warning-option to CLANG_FLAGS
genksyms: Teach parser about 128-bit built-in types
PCI: xilinx-nwl: Fix Multi MSI data programming
iio: iio-utils: Fix possible incorrect mask calculation
powerpc/cacheflush: fix variable set but not used
powerpc/xmon: Fix disabling tracing while in xmon
recordmcount: Fix spurious mcount entries on powerpc
mfd: madera: Add missing of table registration
mfd: core: Set fwnode for created devices
mfd: arizona: Fix undefined behavior
mfd: hi655x-pmic: Fix missing return value check for devm_regmap_init_mmio_clk
mm/swap: fix release_pages() when releasing devmap pages
um: Silence lockdep complaint about mmap_sem
powerpc/4xx/uic: clear pending interrupt after irq type/pol change
RDMA/i40iw: Set queue pair state when being queried
serial: sh-sci: Terminate TX DMA during buffer flushing
serial: sh-sci: Fix TX DMA buffer flushing and workqueue races
IB/mlx5: Fixed reporting counters on 2nd port for Dual port RoCE
powerpc/mm: Handle page table allocation failures
IB/ipoib: Add child to parent list only if device initialized
arm64: assembler: Switch ESB-instruction with a vanilla nop if !ARM64_HAS_RAS
PCI: mobiveil: Fix PCI base address in MEM/IO outbound windows
PCI: mobiveil: Fix the Class Code field
kallsyms: exclude kasan local symbols on s390
PCI: mobiveil: Initialize Primary/Secondary/Subordinate bus numbers
PCI: mobiveil: Use the 1st inbound window for MEM inbound transactions
perf test mmap-thread-lookup: Initialize variable to suppress memory sanitizer warning
perf stat: Fix use-after-freed pointer detected by the smatch tool
perf top: Fix potential NULL pointer dereference detected by the smatch tool
perf session: Fix potential NULL pointer dereference found by the smatch tool
perf annotate: Fix dereferencing freed memory found by the smatch tool
perf hists browser: Fix potential NULL pointer dereference found by the smatch tool
RDMA/rxe: Fill in wc byte_len with IB_WC_RECV_RDMA_WITH_IMM
PCI: dwc: pci-dra7xx: Fix compilation when !CONFIG_GPIOLIB
powerpc/boot: add {get, put}_unaligned_be32 to xz_config.h
block: init flush rq ref count to 1
f2fs: avoid out-of-range memory access
mailbox: handle failed named mailbox channel request
dlm: check if workqueues are NULL before flushing/destroying
powerpc/eeh: Handle hugepages in ioremap space
block/bio-integrity: fix a memory leak bug
sh: prevent warnings when using iounmap
mm/kmemleak.c: fix check for softirq context
9p: pass the correct prototype to read_cache_page
mm/gup.c: mark undo_dev_pagemap as __maybe_unused
mm/gup.c: remove some BUG_ONs from get_gate_page()
memcg, fsnotify: no oom-kill for remote memcg charging
mm/mmu_notifier: use hlist_add_head_rcu()
proc: use down_read_killable mmap_sem for /proc/pid/smaps_rollup
proc: use down_read_killable mmap_sem for /proc/pid/pagemap
proc: use down_read_killable mmap_sem for /proc/pid/clear_refs
proc: use down_read_killable mmap_sem for /proc/pid/map_files
cxgb4: reduce kernel stack usage in cudbg_collect_mem_region()
proc: use down_read_killable mmap_sem for /proc/pid/maps
locking/lockdep: Fix lock used or unused stats error
mm: use down_read_killable for locking mmap_sem in access_remote_vm
locking/lockdep: Hide unused 'class' variable
usb: wusbcore: fix unbalanced get/put cluster_id
usb: pci-quirks: Correct AMD PLL quirk detection
btrfs: inode: Don't compress if NODATASUM or NODATACOW set
x86/sysfb_efi: Add quirks for some devices with swapped width and height
x86/speculation/mds: Apply more accurate check on hypervisor platform
binder: prevent transactions to context manager from its own process.
fpga-manager: altera-ps-spi: Fix build error
mei: me: add mule creek canyon (EHL) device ids
hpet: Fix division by zero in hpet_time_div()
ALSA: ac97: Fix double free of ac97_codec_device
ALSA: line6: Fix wrong altsetting for LINE6_PODHD500_1
ALSA: hda - Add a conexant codec entry to let mute led work
powerpc/xive: Fix loop exit-condition in xive_find_target_in_mask()
powerpc/tm: Fix oops on sigreturn on systems without TM
libnvdimm/bus: Stop holding nvdimm_bus_list_mutex over __nd_ioctl()
access: avoid the RCU grace period for the temporary subjective credentials
Linux 4.19.63
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ic31529aa6fd283d16d6bfb182187a9402a4db44f
Greg Kroah-Hartman
commited |
75ff56e1a2 | |
commit d7852fbd0f0423937fa287a598bfde188bb68c22 upstream. It turns out that 'access()' (and 'faccessat()') can cause a lot of RCU work because it installs a temporary credential that gets allocated and freed for each system call. The allocation and freeing overhead is mostly benign, but because credentials can be accessed under the RCU read lock, the freeing involves a RCU grace period. Which is not a huge deal normally, but if you have a lot of access() calls, this causes a fair amount of seconday damage: instead of having a nice alloc/free patterns that hits in hot per-CPU slab caches, you have all those delayed free's, and on big machines with hundreds of cores, the RCU overhead can end up being enormous. But it turns out that all of this is entirely unnecessary. Exactly because access() only installs the credential as the thread-local subjective credential, the temporary cred pointer doesn't actually need to be RCU free'd at all. Once we're done using it, we can just free it synchronously and avoid all the RCU overhead. So add a 'non_rcu' flag to 'struct cred', which can be set by users that know they only use it in non-RCU context (there are other potential users for this). We can make it a union with the rcu freeing list head that we need for the RCU case, so this doesn't need any extra storage. Note that this also makes 'get_current_cred()' clear the new non_rcu flag, in case we have filesystems that take a long-term reference to the cred and then expect the RCU delayed freeing afterwards. It's not entirely clear that this is required, but it makes for clear semantics: the subjective cred remains non-RCU as long as you only access it synchronously using the thread-local accessors, but you _can_ use it as a generic cred if you want to. It is possible that we should just remove the whole RCU markings for ->cred entirely. Only ->real_cred is really supposed to be accessed through RCU, and the long-term cred copies that nfs uses might want to explicitly re-enable RCU freeing if required, rather than have get_current_cred() do it implicitly. But this is a "minimal semantic changes" change for the immediate problem. Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Eric Dumazet <edumazet@google.com> Acked-by: Paul E. McKenney <paulmck@linux.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Jan Glauber <jglauber@marvell.com> Cc: Jiri Kosina <jikos@kernel.org> Cc: Jayachandran Chandrasekharan Nair <jnair@marvell.com> Cc: Greg KH <greg@kroah.com> Cc: Kees Cook <keescook@chromium.org> Cc: David Howells <dhowells@redhat.com> Cc: Miklos Szeredi <miklos@szeredi.hu> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linus Torvalds
authored and
Greg Kroah-Hartman
commited |
408af82309 | |
[ Upstream commit 1e390478cfb527e34c9ab89ba57212cb05c33c51 ] Recent versions of the DMA API debug code have started to warn about violations of the maximum DMA segment size. This is because the segment size defaults to 64 KiB, which can easily be exceeded in large buffer allocations such as used in DRM/KMS for framebuffers. Technically the Tegra SMMU and ARM SMMU don't have a maximum segment size (they map individual pages irrespective of whether they are contiguous or not), so the choice of 4 MiB is a bit arbitrary here. The maximum segment size is a 32-bit unsigned integer, though, so we can't set it to the correct maximum size, which would be the size of the aperture. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
Thierry Reding
authored and
Greg Kroah-Hartman
commited |
4d14323a2e | |
Make the f2fs implementation of FS_IOC_FSSETXATTR use the new VFS helper
function vfs_ioc_fssetxattr_check(), and remove the project quota check
since it's now done by the helper function.
This is based on a patch from Darrick Wong, but reworked to apply after
commit 360985573b55 ("f2fs: separate f2fs i_flags from fs_flags and ext4
i_flags").
Originally-from: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Eric Biggers
authored and
Jaegeuk Kim
commited |
e831418555 | |
Make the f2fs implementation of FS_IOC_SETFLAGS use the new VFS helper
function vfs_ioc_setflags_prepare().
This is based on a patch from Darrick Wong, but reworked to apply after
commit 360985573b55 ("f2fs: separate f2fs i_flags from fs_flags and ext4
i_flags").
Originally-from: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Eric Biggers
authored and
Jaegeuk Kim
commited |
f62199a95c |