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| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Greg Kroah-Hartman
|
de5730eaef |
This is the 4.19.75 stable release
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Merge 4.19.75 into android-4.19
Changes in 4.19.75
netfilter: nf_flow_table: set default timeout after successful insertion
HID: wacom: generic: read HID_DG_CONTACTMAX from any feature report
RDMA/restrack: Release task struct which was hold by CM_ID object
Input: elan_i2c - remove Lenovo Legion Y7000 PnpID
powerpc/mm/radix: Use the right page size for vmemmap mapping
USB: usbcore: Fix slab-out-of-bounds bug during device reset
media: tm6000: double free if usb disconnect while streaming
phy: renesas: rcar-gen3-usb2: Disable clearing VBUS in over-current
ip6_gre: fix a dst leak in ip6erspan_tunnel_xmit
udp: correct reuseport selection with connected sockets
xen-netfront: do not assume sk_buff_head list is empty in error handling
net_sched: let qdisc_put() accept NULL pointer
KVM: coalesced_mmio: add bounds checking
firmware: google: check if size is valid when decoding VPD data
serial: sprd: correct the wrong sequence of arguments
tty/serial: atmel: reschedule TX after RX was started
mwifiex: Fix three heap overflow at parsing element in cfg80211_ap_settings
nl80211: Fix possible Spectre-v1 for CQM RSSI thresholds
ieee802154: hwsim: Fix error handle path in hwsim_init_module
ieee802154: hwsim: unregister hw while hwsim_subscribe_all_others fails
ARM: dts: am57xx: Disable voltage switching for SD card
ARM: OMAP2+: Fix missing SYSC_HAS_RESET_STATUS for dra7 epwmss
bus: ti-sysc: Fix using configured sysc mask value
s390/bpf: fix lcgr instruction encoding
ARM: OMAP2+: Fix omap4 errata warning on other SoCs
ARM: dts: dra74x: Fix iodelay configuration for mmc3
ARM: OMAP1: ams-delta-fiq: Fix missing irq_ack
bus: ti-sysc: Simplify cleanup upon failures in sysc_probe()
s390/bpf: use 32-bit index for tail calls
selftests/bpf: fix "bind{4, 6} deny specific IP & port" on s390
tools: bpftool: close prog FD before exit on showing a single program
fpga: altera-ps-spi: Fix getting of optional confd gpio
netfilter: ebtables: Fix argument order to ADD_COUNTER
netfilter: nft_flow_offload: missing netlink attribute policy
netfilter: xt_nfacct: Fix alignment mismatch in xt_nfacct_match_info
NFSv4: Fix return values for nfs4_file_open()
NFSv4: Fix return value in nfs_finish_open()
NFS: Fix initialisation of I/O result struct in nfs_pgio_rpcsetup
Kconfig: Fix the reference to the IDT77105 Phy driver in the description of ATM_NICSTAR_USE_IDT77105
xdp: unpin xdp umem pages in error path
qed: Add cleanup in qed_slowpath_start()
ARM: 8874/1: mm: only adjust sections of valid mm structures
batman-adv: Only read OGM2 tvlv_len after buffer len check
bpf: allow narrow loads of some sk_reuseport_md fields with offset > 0
r8152: Set memory to all 0xFFs on failed reg reads
x86/apic: Fix arch_dynirq_lower_bound() bug for DT enabled machines
netfilter: xt_physdev: Fix spurious error message in physdev_mt_check
netfilter: nf_conntrack_ftp: Fix debug output
NFSv2: Fix eof handling
NFSv2: Fix write regression
kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol
cifs: set domainName when a domain-key is used in multiuser
cifs: Use kzfree() to zero out the password
usb: host: xhci-tegra: Set DMA mask correctly
ARM: 8901/1: add a criteria for pfn_valid of arm
ibmvnic: Do not process reset during or after device removal
sky2: Disable MSI on yet another ASUS boards (P6Xxxx)
i2c: designware: Synchronize IRQs when unregistering slave client
perf/x86/intel: Restrict period on Nehalem
perf/x86/amd/ibs: Fix sample bias for dispatched micro-ops
amd-xgbe: Fix error path in xgbe_mod_init()
tools/power x86_energy_perf_policy: Fix "uninitialized variable" warnings at -O2
tools/power x86_energy_perf_policy: Fix argument parsing
tools/power turbostat: fix buffer overrun
net: aquantia: fix out of memory condition on rx side
net: seeq: Fix the function used to release some memory in an error handling path
dmaengine: ti: dma-crossbar: Fix a memory leak bug
dmaengine: ti: omap-dma: Add cleanup in omap_dma_probe()
x86/uaccess: Don't leak the AC flags into __get_user() argument evaluation
x86/hyper-v: Fix overflow bug in fill_gva_list()
keys: Fix missing null pointer check in request_key_auth_describe()
iommu/amd: Flush old domains in kdump kernel
iommu/amd: Fix race in increase_address_space()
PCI: kirin: Fix section mismatch warning
ovl: fix regression caused by overlapping layers detection
floppy: fix usercopy direction
binfmt_elf: move brk out of mmap when doing direct loader exec
arm64: kpti: Whitelist Cortex-A CPUs that don't implement the CSV3 field
media: technisat-usb2: break out of loop at end of buffer
Linux 4.19.75
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I1dd841f112ee81497cd085b102979f45ee5e6b9d
|
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Marc Zyngier
|
9a74f799b9 |
kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol
[ Upstream commit |
||
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Sami Tolvanen
|
9a11e8da57 |
ANDROID: bpf: validate bpf_func when BPF_JIT is enabled with CFI
With CONFIG_BPF_JIT, the kernel makes indirect calls to dynamically generated code, which the compile-time Control-Flow Integrity (CFI) checking cannot validate. This change adds basic sanity checking to ensure we are jumping to a valid location, which narrows down the attack surface on the stored pointer. In addition, this change adds a weak arch_bpf_jit_check_func function, which architectures that implement BPF JIT can override to perform additional validation, such as verifying that the pointer points to the correct memory region. Bug: 140377409 Change-Id: I8ebac6637ab6bd9db44716b1c742add267298669 Signed-off-by: Sami Tolvanen <samitolvanen@google.com> |
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Jason Xing
|
e71f9c35ee |
UPSTREAM: psi: get poll_work to run when calling poll syscall next time
Only when calling the poll syscall the first time can user receive
POLLPRI correctly. After that, user always fails to acquire the event
signal.
Reproduce case:
1. Get the monitor code in Documentation/accounting/psi.txt
2. Run it, and wait for the event triggered.
3. Kill and restart the process.
The question is why we can end up with poll_scheduled = 1 but the work
not running (which would reset it to 0). And the answer is because the
scheduling side sees group->poll_kworker under RCU protection and then
schedules it, but here we cancel the work and destroy the worker. The
cancel needs to pair with resetting the poll_scheduled flag.
Link: http://lkml.kernel.org/r/1566357985-97781-1-git-send-email-joseph.qi@linux.alibaba.com
Signed-off-by: Jason Xing <kerneljasonxing@linux.alibaba.com>
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Caspar Zhang <caspar@linux.alibaba.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit
|
||
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Suren Baghdasaryan
|
849205758a |
UPSTREAM: sched/psi: Do not require setsched permission from the trigger creator
When a process creates a new trigger by writing into /proc/pressure/*
files, permissions to write such a file should be used to determine whether
the process is allowed to do so or not. Current implementation would also
require such a process to have setsched capability. Setting of psi trigger
thread's scheduling policy is an implementation detail and should not be
exposed to the user level. Remove the permission check by using _nocheck
version of the function.
Suggested-by: Nick Kralevich <nnk@google.com>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: lizefan@huawei.com
Cc: mingo@redhat.com
Cc: akpm@linux-foundation.org
Cc: kernel-team@android.com
Cc: dennisszhou@gmail.com
Cc: dennis@kernel.org
Cc: hannes@cmpxchg.org
Cc: axboe@kernel.dk
Link: https://lkml.kernel.org/r/20190730013310.162367-1-surenb@google.com
(cherry picked from commit
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Peter Zijlstra
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2a220bc9f2 |
UPSTREAM: sched/psi: Reduce psimon FIFO priority
PSI defaults to a FIFO-99 thread, reduce this to FIFO-1.
FIFO-99 is the very highest priority available to SCHED_FIFO and
it not a suitable default; it would indicate the psi work is the
most important work on the machine.
Since Real-Time tasks will have pre-allocated memory and locked it in
place, Real-Time tasks do not care about PSI. All it needs is to be
above OTHER.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: Suren Baghdasaryan <surenb@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
(cherry picked from commit
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Greg Kroah-Hartman
|
046263fec6 |
This is the 4.19.74 stable release
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Yang Yingliang
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52bfcc9c84 |
modules: fix compile error if don't have strict module rwx
commit |
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Yang Yingliang
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ae415d7a27 |
modules: fix BUG when load module with rodata=n
commit |
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Yunfeng Ye
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991b3458da |
genirq: Prevent NULL pointer dereference in resend_irqs()
commit |
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zhuguangqing
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81daa79b75 |
ANDROID: Log which device failed to suspend in dpm_suspend_start()
Problem background: In the process of suspend, maybe some device suspend callback failed in dpm_suspend_start()/dpm_prepare()/dpm_suspend(). Because it's after suspend_console(), so printf() is disabled now. Currently we can see "Some devices failed to suspend, or early wake event detected" by log_suspend_abort_reason() in bugreport. There are many devices but we don't know which exactly device failed. So we want to do a little change to record which device failed. Note: I checked upstream LTS kernel, then I found the patch can not be sent upstream, because it uses function log_suspend_abort_reason() in wakeup_reason.c, the initial patch(https://patchwork.kernel.org/patch/3827331/) for adding /kernel/power/wakeup_reason.c is not accepted by upstream which was merged in AOSP common kernels. So maybe the patch could only be sent to AOSP common kernels. Test: manual - Use modified version for daily use two days, from bugreport we can see which device failed. Bug: 120445600 Change-Id: I326c87ca1263496db79d08ec615f12fc22452d7a Signed-off-by: zhuguangqing <zhuguangqing@xiaomi.com> |
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Greg Kroah-Hartman
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8ca5759502 |
This is the 4.19.73 stable release
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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
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Nadav Amit
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192b9af8ca |
resource: fix locking in find_next_iomem_res()
[ Upstream commit |
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Bjorn Helgaas
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485bcc29a2 |
resource: Fix find_next_iomem_res() iteration issue
[ Upstream commit
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Bjorn Helgaas
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9a80dfccad |
resource: Include resource end in walk_*() interfaces
[ Upstream commit |
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YueHaibing
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3015291b2f |
kernel/module: Fix mem leak in module_add_modinfo_attrs
[ Upstream commit |
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Jessica Yu
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9c49f7811f |
modules: always page-align module section allocations
[ Upstream commit |
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Jason A. Donenfeld
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68829256e1 |
timekeeping: Use proper ktime_add when adding nsecs in coarse offset
[ Upstream commit |
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Liangyan
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38d38d1e0c |
sched/fair: Don't assign runtime for throttled cfs_rq
commit |
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Linus Torvalds
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ac351de9dd |
BACKPORT: make 'user_access_begin()' do 'access_ok()'
upstream commit
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Greg Kroah-Hartman
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5fc4dfdee6 |
This is the 4.19.72 stable release
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Andrea Righi
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5e1d50a3ea |
kprobes: Fix potential deadlock in kprobe_optimizer()
[ Upstream commit |
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Greg Kroah-Hartman
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6b1f307bd0 |
This is the 4.19.70 stable release
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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
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Steven Rostedt (VMware)
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8ea639525d |
ftrace: Check for empty hash and comment the race with registering probes
commit |
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Naveen N. Rao
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9d98e0f485 |
ftrace: Check for successful allocation of hash
commit |
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Naveen N. Rao
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f184b16748 |
ftrace: Fix NULL pointer dereference in t_probe_next()
commit |
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Greg Kroah-Hartman
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12dc90c620 |
This is the 4.19.69 stable release
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Fix the hw_ver returned in device attributes isdn: mISDN: hfcsusb: Fix possible null-pointer dereferences in start_isoc_chain() mac80211_hwsim: Fix possible null-pointer dereferences in hwsim_dump_radio_nl() netfilter: ipset: Actually allow destination MAC address for hash:ip,mac sets too netfilter: ipset: Copy the right MAC address in bitmap:ip,mac and hash:ip,mac sets netfilter: ipset: Fix rename concurrency with listing rxrpc: Fix potential deadlock rxrpc: Fix the lack of notification when sendmsg() fails on a DATA packet isdn: hfcsusb: Fix mISDN driver crash caused by transfer buffer on the stack net: phy: phy_led_triggers: Fix a possible null-pointer dereference in phy_led_trigger_change_speed() perf bench numa: Fix cpu0 binding can: sja1000: force the string buffer NULL-terminated can: peak_usb: force the string buffer NULL-terminated net/ethernet/qlogic/qed: force the string buffer NULL-terminated NFSv4: Fix a potential sleep while atomic in nfs4_do_reclaim() NFS: Fix regression whereby fscache errors are appearing on 'nofsc' mounts HID: quirks: Set the INCREMENT_USAGE_ON_DUPLICATE quirk on Saitek X52 HID: input: fix a4tech horizontal wheel custom usage drm/rockchip: Suspend DP late SMB3: Fix potential memory leak when processing compound chain SMB3: Kernel oops mounting a encryptData share with CONFIG_DEBUG_VIRTUAL s390: put _stext and _etext into .text section net: cxgb3_main: Fix a resource leak in a error path in 'init_one()' net: stmmac: Fix issues when number of Queues >= 4 net: stmmac: tc: Do not return a fragment entry net: hisilicon: make hip04_tx_reclaim non-reentrant net: hisilicon: fix hip04-xmit never return TX_BUSY net: hisilicon: Fix dma_map_single failed on arm64 libata: have ata_scsi_rw_xlat() fail invalid passthrough requests libata: add SG safety checks in SFF pio transfers x86/lib/cpu: Address missing prototypes warning drm/vmwgfx: fix memory leak when too many retries have occurred block, bfq: handle NULL return value by bfq_init_rq() perf ftrace: Fix failure to set cpumask when only one cpu is present perf cpumap: Fix writing to illegal memory in handling cpumap mask perf pmu-events: Fix missing "cpu_clk_unhalted.core" event KVM: arm64: Don't write junk to sysregs on reset KVM: arm: Don't write junk to CP15 registers on reset selftests: kvm: Adding config fragments HID: wacom: correct misreported EKR ring values HID: wacom: Correct distance scale for 2nd-gen Intuos devices Revert "dm bufio: fix deadlock with loop device" clk: socfpga: stratix10: fix rate caclulationg for cnt_clks ceph: clear page dirty before invalidate page ceph: don't try fill file_lock on unsuccessful GETFILELOCK reply libceph: fix PG split vs OSD (re)connect race drm/nouveau: Don't retry infinitely when receiving no data on i2c over AUX gpiolib: never report open-drain/source lines as 'input' to user-space Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86_PAE userfaultfd_release: always remove uffd flags and clear vm_userfaultfd_ctx x86/retpoline: Don't clobber RFLAGS during CALL_NOSPEC on i386 x86/apic: Handle missing global clockevent gracefully x86/CPU/AMD: Clear RDRAND CPUID bit on AMD family 15h/16h x86/boot: Save fields explicitly, zero out everything else x86/boot: Fix boot regression caused by bootparam sanitizing dm kcopyd: always complete failed jobs dm btree: fix order of block initialization in btree_split_beneath dm integrity: fix a crash due to BUG_ON in __journal_read_write() dm raid: add missing cleanup in raid_ctr() dm space map metadata: fix missing store of apply_bops() return value dm table: fix invalid memory accesses with too high sector number dm zoned: improve error handling in reclaim dm zoned: improve error handling in i/o map code dm zoned: properly handle backing device failure genirq: Properly pair kobject_del() with kobject_add() mm, page_owner: handle THP splits correctly mm/zsmalloc.c: migration can leave pages in ZS_EMPTY indefinitely mm/zsmalloc.c: fix race condition in zs_destroy_pool xfs: fix missing ILOCK unlock when xfs_setattr_nonsize fails due to EDQUOT xfs: don't trip over uninitialized buffer on extent read of corrupted inode xfs: Move fs/xfs/xfs_attr.h to fs/xfs/libxfs/xfs_attr.h xfs: Add helper function xfs_attr_try_sf_addname xfs: Add attibute set and helper functions xfs: Add attibute remove and helper functions xfs: always rejoin held resources during defer roll dm zoned: fix potential NULL dereference in dmz_do_reclaim() powerpc: Allow flush_(inval_)dcache_range to work across ranges >4GB rxrpc: Fix local endpoint refcounting rxrpc: Fix read-after-free in rxrpc_queue_local() rxrpc: Fix local endpoint replacement rxrpc: Fix local refcounting Linux 4.19.69 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I9824a29e0434a6a80e2f32fdb88c0ac1fe8e5af5 |
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Michael Kelley
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42731deff2 |
genirq: Properly pair kobject_del() with kobject_add()
commit |
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Greg Kroah-Hartman
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bf707e4df1 |
This is the 4.19.68 stable release
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAl1iS0cACgkQONu9yGCS aT7zbhAAyPU6KNVLa1Pj/xQf8puJ3v+FTws0X9Ii9zyWCNNuTXSi8mf4arP8oMjH NsYvhCGBHIQO0l3kFJRnOMLp0pPZPPUgHLvFWQljKWRABUOzMLjCWolnjegIPo8E cUwYkwx5T5oZtYH7ScxfQLiQUJB28L65+gi+/LBqANcEYL6WaSa2+UIBeVUzbMTt tQw6TAmE6f/kGAbmiQFeIdHj6Q9MrQyGBwTdhVSe+OENlZnZq8pxbwy3GXwEBuOP rtmUfZrSxdUmWBa7+/oW14TBe/c6j2LT0tVoyZdUFGZNbOUNv4vEImXghd28YSuv fppeSkom5di+RDH+B+LCNm+rV5vbfQqGTMuwBT6do2EDuQQ5KqS5kR8tULI4GKVl pNejWeK2qcNNloC7imH+4rHIy9AFewKz1ixbGolSaPXyCYfYEBx1xfpw4npng2+X aWJuk7/DnEEdzeKu9msdycQpf0aT5vkJqquBZQTzd5HAMlgqAF/sjvKjIsaUPNu1 wDc+tyyAF0lObR7aswuhvttZ/8yczMW6pOJiM/XAfFn/a+Y7V2FRedGcIsxyeKOw YMNoW6VskIunShpbKhxVjPViI27NM0o8vmwCKmRQ6FRpxOX6vViNj+uQOjGQxfez N5g9jqxLsq9YGVQfoseS2Taao8JkBrTOW0wiJtE3/nwt/FaeHpU= =M37u -----END PGP SIGNATURE----- Merge 4.19.68 into android-4.19 Changes in 4.19.68 sh: kernel: hw_breakpoint: Fix missing break in switch statement seq_file: fix problem when seeking mid-record mm/hmm: fix bad subpage pointer in try_to_unmap_one mm: mempolicy: make the behavior consistent when MPOL_MF_MOVE* and MPOL_MF_STRICT were specified mm: mempolicy: handle vma with unmovable pages mapped correctly in mbind mm/memcontrol.c: fix use after free in mem_cgroup_iter() mm/usercopy: use memory range to be accessed for wraparound check Revert "pwm: Set class for exported channels in sysfs" cpufreq: schedutil: Don't skip freq update when limits change xtensa: add missing isync to the cpu_reset TLB code ALSA: hda/realtek - Add quirk for HP Envy x360 ALSA: usb-audio: Fix a stack buffer overflow bug in check_input_term ALSA: usb-audio: Fix an OOB bug in parse_audio_mixer_unit ALSA: hda - Apply workaround for another AMD chip 1022:1487 ALSA: hda - Fix a memory leak bug ALSA: hda - Add a generic reboot_notify ALSA: hda - Let all conexant codec enter D3 when rebooting HID: holtek: test for sanity of intfdata HID: hiddev: avoid opening a disconnected device HID: hiddev: do cleanup in failure of opening a device Input: kbtab - sanity check for endpoint type Input: iforce - add sanity checks net: usb: pegasus: fix improper read if get_registers() fail netfilter: ebtables: also count base chain policies riscv: Make __fstate_clean() work correctly. clk: at91: generated: Truncate divisor to GENERATED_MAX_DIV + 1 clk: sprd: Select REGMAP_MMIO to avoid compile errors clk: renesas: cpg-mssr: Fix reset control race condition xen/pciback: remove set but not used variable 'old_state' irqchip/gic-v3-its: Free unused vpt_page when alloc vpe table fail irqchip/irq-imx-gpcv2: Forward irq type to parent perf header: Fix divide by zero error if f_header.attr_size==0 perf header: Fix use of unitialized value warning libata: zpodd: Fix small read overflow in zpodd_get_mech_type() drm/bridge: lvds-encoder: Fix build error while CONFIG_DRM_KMS_HELPER=m Btrfs: fix deadlock between fiemap and transaction commits scsi: hpsa: correct scsi command status issue after reset scsi: qla2xxx: Fix possible fcport null-pointer dereferences drm/amdgpu: fix a potential information leaking bug ata: libahci: do not complain in case of deferred probe kbuild: modpost: handle KBUILD_EXTRA_SYMBOLS only for external modules kbuild: Check for unknown options with cc-option usage in Kconfig and clang arm64/efi: fix variable 'si' set but not used arm64: unwind: Prohibit probing on return_address() arm64/mm: fix variable 'pud' set but not used IB/core: Add mitigation for Spectre V1 IB/mlx5: Fix MR registration flow to use UMR properly IB/mad: Fix use-after-free in ib mad completion handling drm: msm: Fix add_gpu_components drm/exynos: fix missing decrement of retry counter Revert "kmemleak: allow to coexist with fault injection" ocfs2: remove set but not used variable 'last_hash' asm-generic: fix -Wtype-limits compiler warnings arm64: KVM: regmap: Fix unexpected switch fall-through KVM: arm/arm64: Sync ICH_VMCR_EL2 back when about to block staging: comedi: dt3000: Fix signed integer overflow 'divider * base' staging: comedi: dt3000: Fix rounding up of timer divisor iio: adc: max9611: Fix temperature reading in probe USB: core: Fix races in character device registration and deregistraion usb: gadget: udc: renesas_usb3: Fix sysfs interface of "role" usb: cdc-acm: make sure a refcount is taken early enough USB: CDC: fix sanity checks in CDC union parser USB: serial: option: add D-Link DWM-222 device ID USB: serial: option: Add support for ZTE MF871A USB: serial: option: add the BroadMobi BM818 card USB: serial: option: Add Motorola modem UARTs drm/i915/cfl: Add a new CFL PCI ID. dm: disable DISCARD if the underlying storage no longer supports it arm64: ftrace: Ensure module ftrace trampoline is coherent with I-side netfilter: conntrack: Use consistent ct id hash calculation Input: psmouse - fix build error of multiple definition iommu/amd: Move iommu_init_pci() to .init section bnx2x: Fix VF's VLAN reconfiguration in reload. bonding: Add vlan tx offload to hw_enc_features net: dsa: Check existence of .port_mdb_add callback before calling it net/mlx4_en: fix a memory leak bug net/packet: fix race in tpacket_snd() sctp: fix memleak in sctp_send_reset_streams sctp: fix the transport error_count check team: Add vlan tx offload to hw_enc_features tipc: initialise addr_trail_end when setting node addresses xen/netback: Reset nr_frags before freeing skb net/mlx5e: Only support tx/rx pause setting for port owner net/mlx5e: Use flow keys dissector to parse packets for ARFS mmc: sdhci-of-arasan: Do now show error message in case of deffered probe Linux 4.19.68 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I8d9bb84a852deab3581f6cb37b4cb16e9bfe927c |
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Viresh Kumar
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7c001e5aab |
cpufreq: schedutil: Don't skip freq update when limits change
commit |
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Quentin Perret
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8e9d3d0740 |
ANDROID: sched/fair: Cap transient util in stune
boosted_cpu_util() sums the CFS and RT util signals before they are used for frequency selection. While the util_avg signals are in sync, util_est prevents cpu_util_cfs() from decreasing when a CFS task is preempted by RT. This util_est behaviour is beneficial in many scenarios, but it can cause the sum of rt_util and cfs_util to go above SCHED_CAPACITY_SCALE. Although benign, this transient value appears in the stune tracepoints, and can cause confusion. Work around the problem by capping the util sum to SCHED_CAPACITY_SCALE. Bug: 120440300 Change-Id: I2be6eb157af86024e52ae11715f5637c77b201a3 Signed-off-by: Quentin Perret <quentin.perret@arm.com> |
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Greg Kroah-Hartman
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b1e96f1650 |
This is the 4.19.67 stable release
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAl1WZYYACgkQONu9yGCS aT5VjRAApdD6wuKcKhZ8j010Ni18w6W+3qs6IuIXv94eav0zFSRaO9Zp93lZq2p0 h+k+ssZ+P8a4EuDquzDydlagno9hojHFAYr+9loPZlZUw578Jzg9JbJK9Z1MyQCo BCRElzZG67E+WjLP0wGHnS0oVhIoHlJaVWP3pEYkTJILY65ErLT/fYGs64YUAEKr Ct1pKoIHPEC0606IKx12kmV645ME4z6pI7g4kLDhk2BozglbxGlwdHgVuIe/NzDP PraR1gqMoOD2skjK673ozsZ65yuiVeqSTsbs49Xao1lAS6etUMbC/ACU/yrhL48H mMM/EFTSKb5TjJSxQAXU1ANQrm4X6n1yPkNW/MdthnPAotDY3Nda4NNVE9X2toM7 XW0HfFdcVD7aJtpC/h6ckndGTaOGkHSPjhJtSlBEjF76BA+KhZ9hhcjNWng92bWL d5Nws4b82wvgM6T99mkZfbMc2MOopPMf+I94W0JcMa49+rXhyhJdrC72GpxKLdSq +XtZJupFWg0RrPlZfmc4Az8f/uY0UfR9gNSaHJokaZAkMzH2x4MzMnPxwRiXAw4W qz1s+sgZlqUQcWvODzaNvG1l7QtjD5rbdJ+FAjN2+16F8rep52Yl/IQffYr04DDD wikYmcUoMh8hCoj6Atj2LAAU9ulhl6ja8s0YpmHz/HQETufHAZc= =gOG+ -----END PGP SIGNATURE----- Merge 4.19.67 into android-4.19 Changes in 4.19.67 iio: cros_ec_accel_legacy: Fix incorrect channel setting iio: adc: max9611: Fix misuse of GENMASK macro staging: gasket: apex: fix copy-paste typo staging: android: ion: Bail out upon SIGKILL when allocating memory. crypto: ccp - 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 |
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Leonard Crestez
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d768173982 |
perf/core: Fix creating kernel counters for PMUs that override event->cpu
[ Upstream commit
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Suren Baghdasaryan
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0c4addb718 |
UPSTREAM: pidfd: fix a poll race when setting exit_state
There is a race between reading task->exit_state in pidfd_poll and
writing it after do_notify_parent calls do_notify_pidfd. Expected
sequence of events is:
CPU 0 CPU 1
------------------------------------------------
exit_notify
do_notify_parent
do_notify_pidfd
tsk->exit_state = EXIT_DEAD
pidfd_poll
if (tsk->exit_state)
However nothing prevents the following sequence:
CPU 0 CPU 1
------------------------------------------------
exit_notify
do_notify_parent
do_notify_pidfd
pidfd_poll
if (tsk->exit_state)
tsk->exit_state = EXIT_DEAD
This causes a polling task to wait forever, since poll blocks because
exit_state is 0 and the waiting task is not notified again. A stress
test continuously doing pidfd poll and process exits uncovered this bug.
To fix it, we make sure that the task's exit_state is always set before
calling do_notify_pidfd.
Fixes:
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Christian Brauner
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abd43bb345 |
UPSTREAM: pid: add pidfd_open()
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
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Joel Fernandes (Google)
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b3481301f4 |
UPSTREAM: pidfd: add polling support
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
|
||
|
Christian Brauner
|
2471d6f992 |
UPSTREAM: signal: improve comments
Improve the comments for pidfd_send_signal().
First, the comment still referred to a file descriptor for a process as a
"task file descriptor" which stems from way back at the beginning of the
discussion. Replace this with "pidfd" for consistency.
Second, the wording for the explanation of the arguments to the syscall
was a bit inconsistent, e.g. some used the past tense some used present
tense. Make the wording more consistent.
Signed-off-by: Christian Brauner <christian@brauner.io>
(cherry picked from commit
|
||
|
Christian Brauner
|
5013eebdf4 |
UPSTREAM: fork: do not release lock that wasn't taken
Avoid calling cgroup_threadgroup_change_end() without having called
cgroup_threadgroup_change_begin() first.
During process creation we need to check whether the cgroup we are in
allows us to fork. To perform this check the cgroup needs to guard itself
against threadgroup changes and takes a lock.
Prior to CLONE_PIDFD the cleanup target "bad_fork_free_pid" would also need
to call cgroup_threadgroup_change_end() because said lock had already been
taken.
However, this is not the case anymore with the addition of CLONE_PIDFD. We
are now allocating a pidfd before we check whether the cgroup we're in can
fork and thus prior to taking the lock. So when copy_process() fails at the
right step it would release a lock we haven't taken.
This bug is not even very subtle to be honest. It's just not very clear
from the naming of cgroup_threadgroup_change_{begin,end}() that a lock is
taken.
Here's the relevant splat:
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7fec849
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90
90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90
90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000ffed5a8c EFLAGS: 00000246 ORIG_RAX: 0000000000000078
RAX: ffffffffffffffda RBX: 0000000000003ffc RCX: 0000000000000000
RDX: 00000000200005c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000012 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(depth <= 0)
WARNING: CPU: 1 PID: 7744 at kernel/locking/lockdep.c:4052 __lock_release
kernel/locking/lockdep.c:4052 [inline]
WARNING: CPU: 1 PID: 7744 at kernel/locking/lockdep.c:4052
lock_release+0x667/0xa00 kernel/locking/lockdep.c:4321
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7744 Comm: syz-executor007 Not tainted 5.1.0+ #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
panic+0x2cb/0x65c kernel/panic.c:214
__warn.cold+0x20/0x45 kernel/panic.c:566
report_bug+0x263/0x2b0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:179 [inline]
fixup_bug arch/x86/kernel/traps.c:174 [inline]
do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:972
RIP: 0010:__lock_release kernel/locking/lockdep.c:4052 [inline]
RIP: 0010:lock_release+0x667/0xa00 kernel/locking/lockdep.c:4321
Code: 0f 85 a0 03 00 00 8b 35 77 66 08 08 85 f6 75 23 48 c7 c6 a0 55 6b 87
48 c7 c7 40 25 6b 87 4c 89 85 70 ff ff ff e8 b7 a9 eb ff <0f> 0b 4c 8b 85
70 ff ff ff 4c 89 ea 4c 89 e6 4c 89 c7 e8 52 63 ff
RSP: 0018:ffff888094117b48 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 1ffff11012822f6f RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815af236 RDI: ffffed1012822f5b
RBP: ffff888094117c00 R08: ffff888092bfc400 R09: fffffbfff113301d
R10: fffffbfff113301c R11: ffffffff889980e3 R12: ffffffff8a451df8
R13: ffffffff8142e71f R14: ffffffff8a44cc80 R15: ffff888094117bd8
percpu_up_read.constprop.0+0xcb/0x110 include/linux/percpu-rwsem.h:92
cgroup_threadgroup_change_end include/linux/cgroup-defs.h:712 [inline]
copy_process.part.0+0x47ff/0x6710 kernel/fork.c:2222
copy_process kernel/fork.c:1772 [inline]
_do_fork+0x25d/0xfd0 kernel/fork.c:2338
__do_compat_sys_x86_clone arch/x86/ia32/sys_ia32.c:240 [inline]
__se_compat_sys_x86_clone arch/x86/ia32/sys_ia32.c:236 [inline]
__ia32_compat_sys_x86_clone+0xbc/0x140 arch/x86/ia32/sys_ia32.c:236
do_syscall_32_irqs_on arch/x86/entry/common.c:334 [inline]
do_fast_syscall_32+0x281/0xd54 arch/x86/entry/common.c:405
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7fec849
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90
90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90
90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000ffed5a8c EFLAGS: 00000246 ORIG_RAX: 0000000000000078
RAX: ffffffffffffffda RBX: 0000000000003ffc RCX: 0000000000000000
RDX: 00000000200005c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000012 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..
Reported-and-tested-by: syzbot+3286e58549edc479faae@syzkaller.appspotmail.com
Fixes:
|
||
|
Christian Brauner
|
5eecbc68ed |
UPSTREAM: signal: support CLONE_PIDFD with pidfd_send_signal
Let pidfd_send_signal() use pidfds retrieved via CLONE_PIDFD. With this
patch pidfd_send_signal() becomes independent of procfs. This fullfils
the request made when we merged the pidfd_send_signal() patchset. The
pidfd_send_signal() syscall is now always available allowing for it to
be used by users without procfs mounted or even users without procfs
support compiled into the kernel.
Signed-off-by: Christian Brauner <christian@brauner.io>
Co-developed-by: Jann Horn <jannh@google.com>
Signed-off-by: Jann Horn <jannh@google.com>
Acked-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
|
||
|
Christian Brauner
|
66faab946a |
UPSTREAM: clone: add CLONE_PIDFD
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
|
||
|
Christian Brauner
|
c46b05132a |
UPSTREAM: signal: use fdget() since we don't allow O_PATH
As stated in the original commit for pidfd_send_signal() we don't allow
to signal processes through O_PATH file descriptors since it is
semantically equivalent to a write on the pidfd.
We already correctly error out right now and return EBADF if an O_PATH
fd is passed. This is because we use file->f_op to detect whether a
pidfd is passed and O_PATH fds have their file->f_op set to empty_fops
in do_dentry_open() and thus fail the test.
Thus, there is no regression. It's just semantically correct to use
fdget() and return an error right from there instead of taking a
reference and returning an error later.
Signed-off-by: Christian Brauner <christian@brauner.io>
Acked-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: Jann Horn <jann@thejh.net>
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: Oleg Nesterov <oleg@redhat.com>
Cc: Aleksa Sarai <cyphar@cyphar.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit
|
||
|
Jann Horn
|
74c14d6081 |
UPSTREAM: signal: don't silently convert SI_USER signals to non-current pidfd
The current sys_pidfd_send_signal() silently turns signals with explicit SI_USER context that are sent to non-current tasks into signals with kernel-generated siginfo. This is unlike do_rt_sigqueueinfo(), which returns -EPERM in this case. If a user actually wants to send a signal with kernel-provided siginfo, they can do that with pidfd_send_signal(pidfd, sig, NULL, 0); so allowing this case is unnecessary. Instead of silently replacing the siginfo, just bail out with an error; this is consistent with other interfaces and avoids special-casing behavior based on security checks. Fixes: |
||
|
Christian Brauner
|
1f27ef8d9b |
BACKPORT: signal: add pidfd_send_signal() syscall
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
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Greg Kroah-Hartman
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487e61785a |
This is the 4.19.66 stable release
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Tejun Heo
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ebda41dd17 |
cgroup: Fix css_task_iter_advance_css_set() cset skip condition
commit |
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Tejun Heo
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0a9abd2778 |
cgroup: css_task_iter_skip()'d iterators must be advanced before accessed
commit |
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Tejun Heo
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4340d175b8 |
cgroup: Include dying leaders with live threads in PROCS iterations
commit
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Tejun Heo
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370b9e6399 |
cgroup: Implement css_task_iter_skip()
commit
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Tejun Heo
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7528e95b75 |
cgroup: Call cgroup_release() before __exit_signal()
commit
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Greg Kroah-Hartman
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de4c70d6a9 |
This is the 4.19.65 stable release
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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
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