- Nov 19, 2020
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Nicholas Piggin authored
IBM Power9 processors can speculatively operate on data in the L1 cache before it has been completely validated, via a way-prediction mechanism. It is not possible for an attacker to determine the contents of impermissible memory using this method, since these systems implement a combination of hardware and software security measures to prevent scenarios where protected data could be leaked. However these measures don't address the scenario where an attacker induces the operating system to speculatively execute instructions using data that the attacker controls. This can be used for example to speculatively bypass "kernel user access prevention" techniques, as discovered by Anthony Steinhauser of Google's Safeside Project. This is not an attack by itself, but there is a possibility it could be used in conjunction with side-channels or other weaknesses in the privileged code to construct an attack. This issue can be mitigated by flushing the L1 cache between privilege boundaries of concern. This patch flushes the L1 cache after user accesses. This is part of the fix for CVE-2020-4788. Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> Signed-off-by:
Daniel Axtens <dja@axtens.net> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Nicholas Piggin authored
IBM Power9 processors can speculatively operate on data in the L1 cache before it has been completely validated, via a way-prediction mechanism. It is not possible for an attacker to determine the contents of impermissible memory using this method, since these systems implement a combination of hardware and software security measures to prevent scenarios where protected data could be leaked. However these measures don't address the scenario where an attacker induces the operating system to speculatively execute instructions using data that the attacker controls. This can be used for example to speculatively bypass "kernel user access prevention" techniques, as discovered by Anthony Steinhauser of Google's Safeside Project. This is not an attack by itself, but there is a possibility it could be used in conjunction with side-channels or other weaknesses in the privileged code to construct an attack. This issue can be mitigated by flushing the L1 cache between privilege boundaries of concern. This patch flushes the L1 cache on kernel entry. This is part of the fix for CVE-2020-4788. Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> Signed-off-by:
Daniel Axtens <dja@axtens.net> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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Russell Currey authored
We are about to add an entry flush. The rfi (exit) flush test measures the number of L1D flushes over a syscall with the RFI flush enabled and disabled. But if the entry flush is also enabled, the effect of enabling and disabling the RFI flush is masked. If there is a debugfs entry for the entry flush, disable it during the RFI flush and restore it later. Reported-by:
Spoorthy S <spoorts2@in.ibm.com> Signed-off-by:
Russell Currey <ruscur@russell.cc> Signed-off-by:
Daniel Axtens <dja@axtens.net> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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- Nov 02, 2020
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Thomas Gleixner: "Three fixes all related to #DB: - Handle the BTF bit correctly so it doesn't get lost due to a kernel #DB - Only clear and set the virtual DR6 value used by ptrace on user space triggered #DB. A kernel #DB must leave it alone to ensure data consistency for ptrace. - Make the bitmasking of the virtual DR6 storage correct so it does not lose DR_STEP" * tag 'x86-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/debug: Fix DR_STEP vs ptrace_get_debugreg(6) x86/debug: Only clear/set ->virtual_dr6 for userspace #DB x86/debug: Fix BTF handling
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer fixes from Thomas Gleixner: "A few fixes for timers/timekeeping: - Prevent undefined behaviour in the timespec64_to_ns() conversion which is used for converting user supplied time input to nanoseconds. It lacked overflow protection. - Mark sched_clock_read_begin/retry() to prevent recursion in the tracer - Remove unused debug functions in the hrtimer and timerlist code" * tag 'timers-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: time: Prevent undefined behaviour in timespec64_to_ns() timers: Remove unused inline funtion debug_timer_free() hrtimer: Remove unused inline function debug_hrtimer_free() time/sched_clock: Mark sched_clock_read_begin/retry() as notrace
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull smp fix from Thomas Gleixner: "A single fix for stop machine. Mark functions no trace to prevent a crash caused by recursion when enabling or disabling a tracer on RISC-V (probably all architectures which patch through stop machine)" * tag 'smp-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: stop_machine, rcu: Mark functions as notrace
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull locking fixes from Thomas Gleixner: "A couple of locking fixes: - Fix incorrect failure injection handling in the fuxtex code - Prevent a preemption warning in lockdep when tracking local_irq_enable() and interrupts are already enabled - Remove more raw_cpu_read() usage from lockdep which causes state corruption on !X86 architectures. - Make the nr_unused_locks accounting in lockdep correct again" * tag 'locking-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: lockdep: Fix nr_unused_locks accounting locking/lockdep: Remove more raw_cpu_read() usage futex: Fix incorrect should_fail_futex() handling lockdep: Fix preemption WARN for spurious IRQ-enable
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscLinus Torvalds authored
Pull char/misc fixes/removals from Greg KH: "Here's some small fixes for 5.10-rc2 and a big driver removal. The fixes are for some reported issues in the interconnect and coresight drivers, nothing major. The "big" driver removal is the MIC drivers have been asked to be removed as the hardware never shipped and Intel no longer wants to maintain something that no one can use. This is welcomed by many as the DMA usage of these drivers was "interesting" and the security people were starting to question some issues that were starting to be found in the codebase. Note, one of the subsystems for this driver, the "VOP" code, will probably come back in future kernel versions as it was looking to potentially solve some PCIe virtualization issues that a number of other vendors were wanting to solve. But as-is, this codebase didn't work for anyone else so no actual functionality is being removed. All of these have been in linux-next with no reported issues" * tag 'char-misc-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: coresight: cti: Initialize dynamic sysfs attributes coresight: Fix uninitialised pointer bug in etm_setup_aux() coresight: add module license misc: mic: remove the MIC drivers interconnect: qcom: use icc_sync state for sm8[12]50 interconnect: qcom: Ensure that the floor bandwidth value is enforced interconnect: qcom: sc7180: Init BCMs before creating the nodes interconnect: qcom: sdm845: Init BCMs before creating the nodes interconnect: Aggregate before setting initial bandwidth interconnect: qcom: sdm845: Enable keepalive for the MM1 BCM
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Linus Torvalds authored
Merge tag 'driver-core-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core and documentation fixes from Greg KH: "Here is one tiny debugfs change to fix up an API where the last user was successfully fixed up in 5.10-rc1 (so it couldn't be merged earlier), and a much larger Documentation/ABI/ update to the files so they can be automatically parsed by our tools. The Documentation/ABI/ updates are just formatting issues, small ones to bring the files into parsable format, and have been acked by numerous subsystem maintainers and the documentation maintainer. I figured it was good to get this into 5.10-rc2 to help wih the merge issues that would arise if these were to stick in linux-next until 5.11-rc1. The debugfs change has been in linux-next for a long time, and the Documentation updates only for the last linux-next release" * tag 'driver-core-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (40 commits) scripts: get_abi.pl: assume ReST format by default docs: ABI: sysfs-class-led-trigger-pattern: remove hw_pattern duplication docs: ABI: sysfs-class-backlight: unify ABI documentation docs: ABI: sysfs-c2port: remove a duplicated entry docs: ABI: sysfs-class-power: unify duplicated properties docs: ABI: unify /sys/class/leds/<led>/brightness documentation docs: ABI: stable: remove a duplicated documentation docs: ABI: change read/write attributes docs: ABI: cleanup several ABI documents docs: ABI: sysfs-bus-nvdimm: use the right format for ABI docs: ABI: vdso: use the right format for ABI docs: ABI: fix syntax to be parsed using ReST notation docs: ABI: convert testing/configfs-acpi to ReST docs: Kconfig/Makefile: add a check for broken ABI files docs: abi-testing.rst: enable --rst-sources when building docs docs: ABI: don't escape ReST-incompatible chars from obsolete and removed docs: ABI: create a 2-depth index for ABI docs: ABI: make it parse ABI/stable as ReST-compatible files docs: ABI: sysfs-uevent: make it compatible with ReST output docs: ABI: testing: make the files compatible with ReST output ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds authored
Pull staging driver fixes from Greg KH: "Here are some small staging driver fixes for issues that have been reported in 5.10-rc1: - octeon driver fixes - wfx driver fixes - memory leak fix in vchiq driver - fieldbus driver bugfix - comedi driver bugfix All of these have been in linux-next with no reported issues" * tag 'staging-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: staging: fieldbus: anybuss: jump to correct label in an error path staging: wfx: fix test on return value of gpiod_get_value() staging: wfx: fix use of uninitialized pointer staging: mmal-vchiq: Fix memory leak for vchiq_instance staging: comedi: cb_pcidas: Allow 2-channel commands for AO subdevice staging: octeon: Drop on uncorrectable alignment or FCS error staging: octeon: repair "fixed-link" support
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/ttyLinus Torvalds authored
Pull tty/serial fixes from Greg KH: "Here are some small TTY and Serial driver fixes for reported issues for 5.10-rc2. They include: - vt ioctl bugfix for reported problems - fsl_lpuart serial driver fix - 21285 serial driver bugfix All have been in linux-next with no reported issues" * tag 'tty-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: vt_ioctl: fix GIO_UNIMAP regression vt: keyboard, extend func_buf_lock to readers vt: keyboard, simplify vt_kdgkbsent tty: serial: fsl_lpuart: LS1021A has a FIFO size of 16 words, like LS1028A tty: serial: 21285: fix lockup on open
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Pull USB driver fixes from Greg KH: "Here are a number of small bugfixes for reported issues in some USB drivers. They include: - typec bugfixes - xhci bugfixes and lockdep warning fixes - cdc-acm driver regression fix - kernel doc fixes - cdns3 driver bugfixes for a bunch of reported issues - other tiny USB driver fixes All have been in linux-next with no reported issues" * tag 'usb-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: usb: cdns3: gadget: own the lock wrongly at the suspend routine usb: cdns3: Fix on-chip memory overflow issue usb: cdns3: gadget: suspicious implicit sign extension xhci: Don't create stream debugfs files with spinlock held. usb: xhci: Workaround for S3 issue on AMD SNPS 3.0 xHC xhci: Fix sizeof() mismatch usb: typec: stusb160x: fix signedness comparison issue with enum variables usb: typec: add missing MODULE_DEVICE_TABLE() to stusb160x USB: apple-mfi-fastcharge: don't probe unhandled devices usbcore: Check both id_table and match() when both available usb: host: ehci-tegra: Fix error handling in tegra_ehci_probe() usb: typec: stusb160x: fix an IS_ERR() vs NULL check in probe usb: typec: tcpm: reset hard_reset_count for any disconnect usb: cdc-acm: fix cooldown mechanism usb: host: fsl-mph-dr-of: check return of dma_set_mask() usb: fix kernel-doc markups usb: typec: stusb160x: fix some signedness bugs usb: cdns3: Variable 'length' set but not used
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull kvm fixes from Paolo Bonzini: "ARM: - selftest fix - force PTE mapping on device pages provided via VFIO - fix detection of cacheable mapping at S2 - fallback to PMD/PTE mappings for composite huge pages - fix accounting of Stage-2 PGD allocation - fix AArch32 handling of some of the debug registers - simplify host HYP entry - fix stray pointer conversion on nVHE TLB invalidation - fix initialization of the nVHE code - simplify handling of capabilities exposed to HYP - nuke VCPUs caught using a forbidden AArch32 EL0 x86: - new nested virtualization selftest - miscellaneous fixes - make W=1 fixes - reserve new CPUID bit in the KVM leaves" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: vmx: remove unused variable KVM: selftests: Don't require THP to run tests KVM: VMX: eVMCS: make evmcs_sanitize_exec_ctrls() work again KVM: selftests: test behavior of unmapped L2 APIC-access address KVM: x86: Fix NULL dereference at kvm_msr_ignored_check() KVM: x86: replace static const variables with macros KVM: arm64: Handle Asymmetric AArch32 systems arm64: cpufeature: upgrade hyp caps to final arm64: cpufeature: reorder cpus_have_{const, final}_cap() KVM: arm64: Factor out is_{vhe,nvhe}_hyp_code() KVM: arm64: Force PTE mapping on fault resulting in a device mapping KVM: arm64: Use fallback mapping sizes for contiguous huge page sizes KVM: arm64: Fix masks in stage2_pte_cacheable() KVM: arm64: Fix AArch32 handling of DBGD{CCINT,SCRext} and DBGVCR KVM: arm64: Allocate stage-2 pgd pages with GFP_KERNEL_ACCOUNT KVM: arm64: Drop useless PAN setting on host EL1 to EL2 transition KVM: arm64: Remove leftover kern_hyp_va() in nVHE TLB invalidation KVM: arm64: Don't corrupt tpidr_el2 on failed HVC call x86/kvm: Reserve KVM_FEATURE_MSI_EXT_DEST_ID
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- Nov 01, 2020
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git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds authored
Pull vhost fixes from Michael Tsirkin: "Fixes all over the place. A new UAPI is borderline: can also be considered a new feature but also seems to be the only way we could come up with to fix addressing for userspace - and it seems important to switch to it now before userspace making assumptions about addressing ability of devices is set in stone" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vdpasim: allow to assign a MAC address vdpasim: fix MAC address configuration vdpa: handle irq bypass register failure case vdpa_sim: Fix DMA mask Revert "vhost-vdpa: fix page pinning leakage in error path" vdpa/mlx5: Fix error return in map_direct_mr() vhost_vdpa: Return -EFAULT if copy_from_user() fails vdpa_sim: implement get_iova_range() vhost: vdpa: report iova range vdpa: introduce config op to get valid iova range
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Linus Torvalds authored
Merge tag 'flexible-array-conversions-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux Pull more flexible-array member conversions from Gustavo A. R. Silva: "Replace zero-length arrays with flexible-array members" * tag 'flexible-array-conversions-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux: printk: ringbuffer: Replace zero-length array with flexible-array member net/smc: Replace zero-length array with flexible-array member net/mlx5: Replace zero-length array with flexible-array member mei: hw: Replace zero-length array with flexible-array member gve: Replace zero-length array with flexible-array member Bluetooth: btintel: Replace zero-length array with flexible-array member scsi: target: tcmu: Replace zero-length array with flexible-array member ima: Replace zero-length array with flexible-array member enetc: Replace zero-length array with flexible-array member fs: Replace zero-length array with flexible-array member Bluetooth: Replace zero-length array with flexible-array member params: Replace zero-length array with flexible-array member tracepoint: Replace zero-length array with flexible-array member platform/chrome: cros_ec_proto: Replace zero-length array with flexible-array member platform/chrome: cros_ec_commands: Replace zero-length array with flexible-array member mailbox: zynqmp-ipi-message: Replace zero-length array with flexible-array member dmaengine: ti-cppi5: Replace zero-length array with flexible-array member
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git://git.infradead.org/users/hch/dma-mappingLinus Torvalds authored
Pull dma-mapping fix from Christoph Hellwig: "Fix an integer overflow on 32-bit platforms in the new DMA range code (Geert Uytterhoeven)" * tag 'dma-mapping-5.10-2' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: fix 32-bit overflow with CONFIG_ARM_LPAE=n
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "Four driver fixes and one core fix. The core fix closes a race window where we could kick off a second asynchronous scan because the test and set of the variable preventing it isn't atomic" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: hisi_sas: Stop using queue #0 always for v2 hw scsi: ibmvscsi: Fix potential race after loss of transport scsi: mptfusion: Fix null pointer dereferences in mptscsih_remove() scsi: qla2xxx: Return EBUSY on fcport deletion scsi: core: Don't start concurrent async scan on same host
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- Oct 31, 2020
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Paolo Bonzini authored
Reported-by:
kernel test robot <lkp@intel.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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Andrew Jones authored
Unless we want to test with THP, then we shouldn't require it to be configured by the host kernel. Unfortunately, even advising with MADV_NOHUGEPAGE does require it, so check for THP first in order to avoid madvise failing with EINVAL. Signed-off-by:
Andrew Jones <drjones@redhat.com> Message-Id: <20201029201703.102716-2-drjones@redhat.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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Vitaly Kuznetsov authored
It was noticed that evmcs_sanitize_exec_ctrls() is not being executed nowadays despite the code checking 'enable_evmcs' static key looking correct. Turns out, static key magic doesn't work in '__init' section (and it is unclear when things changed) but setup_vmcs_config() is called only once per CPU so we don't really need it to. Switch to checking 'enlightened_vmcs' instead, it is supposed to be in sync with 'enable_evmcs'. Opportunistically make evmcs_sanitize_exec_ctrls '__init' and drop unneeded extra newline from it. Reported-by:
Yang Weijiang <weijiang.yang@intel.com> Signed-off-by:
Vitaly Kuznetsov <vkuznets@redhat.com> Message-Id: <20201014143346.2430936-1-vkuznets@redhat.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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Jim Mattson authored
Add a regression test for commit 671ddc70 ("KVM: nVMX: Don't leak L1 MMIO regions to L2"). First, check to see that an L2 guest can be launched with a valid APIC-access address that is backed by a page of L1 physical memory. Next, set the APIC-access address to a (valid) L1 physical address that is not backed by memory. KVM can't handle this situation, so resuming L2 should result in a KVM exit for internal error (emulation). Signed-off-by:
Jim Mattson <jmattson@google.com> Reviewed-by:
Ricardo Koller <ricarkol@google.com> Reviewed-by:
Peter Shier <pshier@google.com> Message-Id: <20201026180922.3120555-1-jmattson@google.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull block fixes from Jens Axboe: - null_blk zone fixes (Damien, Kanchan) - NVMe pull request from Christoph: - improve zone revalidation (Keith Busch) - gracefully handle zero length messages in nvme-rdma (zhenwei pi) - nvme-fc error handling fixes (James Smart) - nvmet tracing NULL pointer dereference fix (Chaitanya Kulkarni)" - xsysace platform fixes (Andy) - scatterlist type cleanup (David) - blk-cgroup memory fixes (Gabriel) - nbd block size update fix (Ming) - Flush completion state fix (Ming) - bio_add_hw_page() iteration fix (Naohiro) * tag 'block-5.10-2020-10-30' of git://git.kernel.dk/linux-block: blk-mq: mark flush request as IDLE in flush_end_io() lib/scatterlist: use consistent sg_copy_buffer() return type xsysace: use platform_get_resource() and platform_get_irq_optional() null_blk: Fix locking in zoned mode null_blk: Fix zone reset all tracing nbd: don't update block size after device is started block: advance iov_iter on bio_add_hw_page failure null_blk: synchronization fix for zoned device nvmet: fix a NULL pointer dereference when tracing the flush command nvme-fc: remove nvme_fc_terminate_io() nvme-fc: eliminate terminate_io use by nvme_fc_error_recovery nvme-fc: remove err_work work item nvme-fc: track error_recovery while connecting nvme-rdma: handle unexpected nvme completion data length nvme: ignore zone validate errors on subsequent scans blk-cgroup: Pre-allocate tree node on blkg_conf_prep blk-cgroup: Fix memleak on error path
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Gustavo A. R. Silva authored
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays Signed-off-by:
Gustavo A. R. Silva <gustavoars@kernel.org>
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Gustavo A. R. Silva authored
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays Signed-off-by:
Gustavo A. R. Silva <gustavoars@kernel.org>
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Gustavo A. R. Silva authored
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays Signed-off-by:
Gustavo A. R. Silva <gustavoars@kernel.org>
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Gustavo A. R. Silva authored
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays Signed-off-by:
Gustavo A. R. Silva <gustavoars@kernel.org>
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Gustavo A. R. Silva authored
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. Refactor the code according to the use of a flexible-array member in struct gve_stats_report, instead of a zero-length array, and use the struct_size() helper to calculate the size for the resource allocation. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays Signed-off-by:
Gustavo A. R. Silva <gustavoars@kernel.org>
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Gustavo A. R. Silva authored
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays Signed-off-by:
Gustavo A. R. Silva <gustavoars@kernel.org>
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull io_uring fixes from Jens Axboe: - Fixes for linked timeouts (Pavel) - Set IO_WQ_WORK_CONCURRENT early for async offload (Pavel) - Two minor simplifications that make the code easier to read and follow (Pavel) * tag 'io_uring-5.10-2020-10-30' of git://git.kernel.dk/linux-block: io_uring: use type appropriate io_kiocb handler for double poll io_uring: simplify __io_queue_sqe() io_uring: simplify nxt propagation in io_queue_sqe io_uring: don't miss setting IO_WQ_WORK_CONCURRENT io_uring: don't defer put of cancelled ltimeout io_uring: always clear LINK_TIMEOUT after cancel io_uring: don't adjust LINK_HEAD in cancel ltimeout io_uring: remove opcode check on ltimeout kill
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull libata fix from Jens Axboe: "Single fix for an old regression with sata_nv" * tag 'libata-5.10-2020-10-30' of git://git.kernel.dk/linux-block: ata: sata_nv: Fix retrieving of active qcs
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git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linuxLinus Torvalds authored
Pull btrfs fixes from David Sterba: - lockdep fixes: - drop path locks before manipulating sysfs objects or qgroups - preliminary fixes before tree locks get switched to rwsem - use annotated seqlock - build warning fixes (printk format) - fix relocation vs fallocate race - tree checker properly validates number of stripes and parity - readahead vs device replace fixes - iomap dio fix for unnecessary buffered io fallback * tag 'for-5.10-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: btrfs: convert data_seqcount to seqcount_mutex_t btrfs: don't fallback to buffered read if we don't need to btrfs: add a helper to read the tree_root commit root for backref lookup btrfs: drop the path before adding qgroup items when enabling qgroups btrfs: fix readahead hang and use-after-free after removing a device btrfs: fix use-after-free on readahead extent after failure to create it btrfs: tree-checker: validate number of chunk stripes and parity btrfs: tree-checker: fix incorrect printk format btrfs: drop the path before adding block group sysfs files btrfs: fix relocation failure due to race with fallocate
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linuxLinus Torvalds authored
Pull arm64 fixes from Will Deacon: "The diffstat is a bit spread out thanks to an invasive CPU erratum workaround which missed the merge window and also a bunch of fixes to the recently added MTE selftests. - Fixes to MTE kselftests - Fix return code from KVM Spectre-v2 hypercall - Build fixes for ld.lld and Clang's infamous integrated assembler - Ensure RCU is up and running before we use printk() - Workaround for Cortex-A77 erratum 1508412 - Fix linker warnings from unexpected ELF sections - Ensure PE/COFF sections are 64k aligned" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: Change .weak to SYM_FUNC_START_WEAK_PI for arch/arm64/lib/mem*.S arm64/smp: Move rcu_cpu_starting() earlier arm64: Add workaround for Arm Cortex-A77 erratum 1508412 arm64: Add part number for Arm Cortex-A77 arm64: mte: Document that user PSTATE.TCO is ignored by kernel uaccess module: use hidden visibility for weak symbol references arm64: efi: increase EFI PE/COFF header padding to 64 KB arm64: vmlinux.lds: account for spurious empty .igot.plt sections kselftest/arm64: Fix check_user_mem test kselftest/arm64: Fix check_ksm_options test kselftest/arm64: Fix check_mmap_options test kselftest/arm64: Fix check_child_memory test kselftest/arm64: Fix check_tags_inclusion test kselftest/arm64: Fix check_buffer_fill test arm64: avoid -Woverride-init warning KVM: arm64: ARM_SMCCC_ARCH_WORKAROUND_1 doesn't return SMCCC_RET_NOT_REQUIRED arm64: vdso32: Allow ld.lld to properly link the VDSO
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Linus Torvalds authored
Merge tag 'asm-generic-fixes-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic fix from Arnd Bergmann: "One small bugfix, fixing a build regression for RISC-V" * tag 'asm-generic-fixes-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: asm-generic: mark __{get,put}_user_fn as __always_inline
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/socLinus Torvalds authored
Pull ARM SoC fixes from Arnd Bergmann: "This is a fairly large set of bug fixes on top of -rc1, as most of them were ready but didn't quite make it into the last-minute pull requests for the merge window. Allwinner: - fix for incorrect CPU overtemperature limit Amlogic: - multiple smaller DT bugfixes, and missing device nodes Marvell EBU: - add missing aliases for ethernet switch ports on espressobin board Marvell MMP: - DTC warning fix - bugfix for camera interface power-down NXP i.MX: - re-enable the GPIO driver on all defconfigs ST STM32MP1: - fix random crashes from incorrect voltage settings Synaptics Berlin: - enable the correct hardware timer driver Texas Instruments K2G: - fix a boot regression in the power domain code TEE drivers: - fix regression in TEE "login" method SCMI drivers: - multiple code fixes for corner cases in newly added code MAINTAINERS file: - move Kukjin Kim and Sangbeom Kim to credits (used to work on Samsung Exynos) - Masahiro Yamada is stepping down as Uniphier maintainer I did not include a series of patches that work around a regression caused by a bugfix in an ethernet phy driver that resulted in an inadvertent DT binding change. This is still under discussion" * tag 'arm-soc-fixes-v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (31 commits) soc: ti: ti_sci_pm_domains: check for proper args count in xlate ARM: dts: stm32: Describe Vin power supply on stm32mp157c-edx board ARM: dts: stm32: Describe Vin power supply on stm32mp15xx-dkx board ARM: multi_v5_defconfig: Select CONFIG_GPIO_MXC ARM: imx_v4_v5_defconfig: Select CONFIG_GPIO_MXC ARM: dts: mmp2-olpc-xo-1-75: Use plural form of "-gpios" ARM: dts: mmp3: Add power domain for the camera arm64: berlin: Select DW_APB_TIMER_OF dt-bindings: sram: sunxi-sram: add V3s compatible string MAINTAINERS: Move Sangbeom Kim to credits MAINTAINERS: Move Kukjin Kim to credits MAINTAINERS: step down as maintainer of UniPhier SoCs and Denali driver ARM: multi_v7_defconfig: Build in CONFIG_GPIO_MXC by default ARM: imx_v6_v7_defconfig: Build in CONFIG_GPIO_MXC by default arm64: defconfig: Build in CONFIG_GPIO_MXC by default arm64: dts: meson: odroid-n2 plus: fix vddcpu_a pwm ARM: dts: meson8: remove two invalid interrupt lines from the GPU node arm64: dts: amlogic: add missing ethernet reset ID firmware: arm_scmi: Fix duplicate workqueue name firmware: arm_scmi: Fix locking in notifications ...
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull PNP fix from Rafael Wysocki: "Make function names in kerneldoc comments match the actual names of the functions that they correspond to (Mauro Carvalho Chehab)" * tag 'pnp-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PNP: fix kernel-doc markups
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull device properties framework fixes from Rafael Wysocki: "Fix the secondary firmware node handling while manipulating the primary firmware node for a given device (Andy Shevchenko)" * tag 'devprop-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: device property: Don't clear secondary pointer for shared primary firmware node device property: Keep secondary firmware node secondary by type
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull ACPI fixes from Rafael Wysocki: "These fix three assorted minor issues. Specifics: - Eliminate compiler warning emitted when building the ACPI dock driver (Arnd Bergmann). - Drop lid_init_state quirk for Acer SW5-012 that is not needed any more after recent changes (Hans de Goede). - Fix "missing minus" typo in the NFIT parsing code (Zhang Qilong)" * tag 'acpi-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI: button: Drop no longer necessary Acer SW5-012 lid_init_state quirk ACPI: NFIT: Fix comparison to '-ENXIO' ACPI: dock: fix enum-conversion warning
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull power management fixes from Rafael Wysocki: "These fix a few issues related to running intel_pstate in the passive mode with HWP enabled, correct the handling of the max_cstate module parameter in intel_idle and make a few janitorial changes. Specifics: - Modify Kconfig to prevent configuring either the "conservative" or the "ondemand" governor as the default cpufreq governor if intel_pstate is selected, in which case "schedutil" is the default choice for the default governor setting (Rafael Wysocki). - Modify the cpufreq core, intel_pstate and the schedutil governor to avoid missing updates of the HWP max limit when intel_pstate operates in the passive mode with HWP enabled (Rafael Wysocki). - Fix max_cstate module parameter handling in intel_idle for processor models with C-state tables coming from ACPI (Chen Yu). - Clean up assorted pieces of power management code (Jackie Zamow, Tom Rix, Zhang Qilong)" * tag 'pm-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: schedutil: Always call driver if CPUFREQ_NEED_UPDATE_LIMITS is set cpufreq: Introduce cpufreq_driver_test_flags() cpufreq: speedstep: remove unneeded semicolon PM: sleep: fix typo in kernel/power/process.c intel_idle: Fix max_cstate for processor models without C-state tables cpufreq: intel_pstate: Avoid missing HWP max updates in passive mode cpufreq: Introduce CPUFREQ_NEED_UPDATE_LIMITS driver flag cpufreq: Avoid configuring old governors as default with intel_pstate cpufreq: e_powersaver: remove unreachable break
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git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmcLinus Torvalds authored
Pull MMC host fixes from Ulf Hansson: - sdhci: Fix performance regression with auto CMD auto select - sdhci-of-esdhc: Fix initialization for eMMC HS400 mode - sdhci-of-esdhc: Fix timeout bug for tuning commands * tag 'mmc-v5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: sdhci-of-esdhc: make sure delay chain locked for HS400 mmc: sdhci-of-esdhc: set timeout to max before tuning mmc: sdhci: Use Auto CMD Auto Select only when v4_mode is true
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