- 28 Sep, 2019 4 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fixes from Ingo Molnar: - Apply a number of membarrier related fixes and cleanups, which fixes a use-after-free race in the membarrier code - Introduce proper RCU protection for tasks on the runqueue - to get rid of the subtle task_rcu_dereference() interface that was easy to get wrong - Misc fixes, but also an EAS speedup * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/fair: Avoid redundant EAS calculation sched/core: Remove double update_max_interval() call on CPU startup sched/core: Fix preempt_schedule() interrupt return comment sched/fair: Fix -Wunused-but-set-variable warnings sched/core: Fix migration to invalid CPU in __set_cpus_allowed_ptr() sched/membarrier: Return -ENOMEM to userspace on memory allocation failure sched/membarrier: Skip IPIs when mm->mm_users == 1 selftests, sched/membarrier: Add multi-threaded test sched/membarrier: Fix p->mm->membarrier_state racy load sched/membarrier: Call sync_core only before usermode for same mm sched/membarrier: Remove redundant check sched/membarrier: Fix private expedited registration check tasks, sched/core: RCUify the assignment of rq->curr tasks, sched/core: With a grace period after finish_task_switch(), remove unnecessary code tasks, sched/core: Ensure tasks are available for a grace period after leaving the runqueue tasks: Add a count of task RCU users sched/core: Convert vcpu_is_preempted() from macro to an inline function sched/fair: Remove unused cfs_rq_clock_task() function
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Linus Torvalds authored
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull kernel lockdown mode from James Morris: "This is the latest iteration of the kernel lockdown patchset, from Matthew Garrett, David Howells and others. From the original description: This patchset introduces an optional kernel lockdown feature, intended to strengthen the boundary between UID 0 and the kernel. When enabled, various pieces of kernel functionality are restricted. Applications that rely on low-level access to either hardware or the kernel may cease working as a result - therefore this should not be enabled without appropriate evaluation beforehand. The majority of mainstream distributions have been carrying variants of this patchset for many years now, so there's value in providing a doesn't meet every distribution requirement, but gets us much closer to not requiring external patches. There are two major changes since this was last proposed for mainline: - Separating lockdown from EFI secure boot. Background discussion is covered here: https://lwn.net/Articles/751061/ - Implementation as an LSM, with a default stackable lockdown LSM module. This allows the lockdown feature to be policy-driven, rather than encoding an implicit policy within the mechanism. The new locked_down LSM hook is provided to allow LSMs to make a policy decision around whether kernel functionality that would allow tampering with or examining the runtime state of the kernel should be permitted. The included lockdown LSM provides an implementation with a simple policy intended for general purpose use. This policy provides a coarse level of granularity, controllable via the kernel command line: lockdown={integrity|confidentiality} Enable the kernel lockdown feature. If set to integrity, kernel features that allow userland to modify the running kernel are disabled. If set to confidentiality, kernel features that allow userland to extract confidential information from the kernel are also disabled. This may also be controlled via /sys/kernel/security/lockdown and overriden by kernel configuration. New or existing LSMs may implement finer-grained controls of the lockdown features. Refer to the lockdown_reason documentation in include/linux/security.h for details. The lockdown feature has had signficant design feedback and review across many subsystems. This code has been in linux-next for some weeks, with a few fixes applied along the way. Stephen Rothwell noted that commit 9d1f8be5 ("bpf: Restrict bpf when kernel lockdown is in confidentiality mode") is missing a Signed-off-by from its author. Matthew responded that he is providing this under category (c) of the DCO" * 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (31 commits) kexec: Fix file verification on S390 security: constify some arrays in lockdown LSM lockdown: Print current->comm in restriction messages efi: Restrict efivar_ssdt_load when the kernel is locked down tracefs: Restrict tracefs when the kernel is locked down debugfs: Restrict debugfs when the kernel is locked down kexec: Allow kexec_file() with appropriate IMA policy when locked down lockdown: Lock down perf when in confidentiality mode bpf: Restrict bpf when kernel lockdown is in confidentiality mode lockdown: Lock down tracing and perf kprobes when in confidentiality mode lockdown: Lock down /proc/kcore x86/mmiotrace: Lock down the testmmiotrace module lockdown: Lock down module params that specify hardware parameters (eg. ioport) lockdown: Lock down TIOCSSERIAL lockdown: Prohibit PCMCIA CIS storage when the kernel is locked down acpi: Disable ACPI table override if the kernel is locked down acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down ACPI: Limit access to custom_method when the kernel is locked down x86/msr: Restrict MSR access when the kernel is locked down x86: Lock down IO port access when the kernel is locked down ...
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Linus Torvalds authored
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity Pull integrity updates from Mimi Zohar: "The major feature in this time is IMA support for measuring and appraising appended file signatures. In addition are a couple of bug fixes and code cleanup to use struct_size(). In addition to the PE/COFF and IMA xattr signatures, the kexec kernel image may be signed with an appended signature, using the same scripts/sign-file tool that is used to sign kernel modules. Similarly, the initramfs may contain an appended signature. This contained a lot of refactoring of the existing appended signature verification code, so that IMA could retain the existing framework of calculating the file hash once, storing it in the IMA measurement list and extending the TPM, verifying the file's integrity based on a file hash or signature (eg. xattrs), and adding an audit record containing the file hash, all based on policy. (The IMA support for appended signatures patch set was posted and reviewed 11 times.) The support for appended signature paves the way for adding other signature verification methods, such as fs-verity, based on a single system-wide policy. The file hash used for verifying the signature and the signature, itself, can be included in the IMA measurement list" * 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity: ima: ima_api: Use struct_size() in kzalloc() ima: use struct_size() in kzalloc() sefltest/ima: support appended signatures (modsig) ima: Fix use after free in ima_read_modsig() MODSIGN: make new include file self contained ima: fix freeing ongoing ahash_request ima: always return negative code for error ima: Store the measurement again when appraising a modsig ima: Define ima-modsig template ima: Collect modsig ima: Implement support for module-style appended signatures ima: Factor xattr_verify() out of ima_appraise_measurement() ima: Add modsig appraise_type option for module-style appended signatures integrity: Select CONFIG_KEYS instead of depending on it PKCS#7: Introduce pkcs7_get_digest() PKCS#7: Refactor verify_pkcs7_signature() MODSIGN: Export module signature definitions ima: initialize the "template" field with the default template
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git://linux-nfs.org/~bfields/linuxLinus Torvalds authored
Pull nfsd updates from Bruce Fields: "Highlights: - Add a new knfsd file cache, so that we don't have to open and close on each (NFSv2/v3) READ or WRITE. This can speed up read and write in some cases. It also replaces our readahead cache. - Prevent silent data loss on write errors, by treating write errors like server reboots for the purposes of write caching, thus forcing clients to resend their writes. - Tweak the code that allocates sessions to be more forgiving, so that NFSv4.1 mounts are less likely to hang when a server already has a lot of clients. - Eliminate an arbitrary limit on NFSv4 ACL sizes; they should now be limited only by the backend filesystem and the maximum RPC size. - Allow the server to enforce use of the correct kerberos credentials when a client reclaims state after a reboot. And some miscellaneous smaller bugfixes and cleanup" * tag 'nfsd-5.4' of git://linux-nfs.org/~bfields/linux: (34 commits) sunrpc: clean up indentation issue nfsd: fix nfs read eof detection nfsd: Make nfsd_reset_boot_verifier_locked static nfsd: degraded slot-count more gracefully as allocation nears exhaustion. nfsd: handle drc over-allocation gracefully. nfsd: add support for upcall version 2 nfsd: add a "GetVersion" upcall for nfsdcld nfsd: Reset the boot verifier on all write I/O errors nfsd: Don't garbage collect files that might contain write errors nfsd: Support the server resetting the boot verifier nfsd: nfsd_file cache entries should be per net namespace nfsd: eliminate an unnecessary acl size limit Deprecate nfsd fault injection nfsd: remove duplicated include from filecache.c nfsd: Fix the documentation for svcxdr_tmpalloc() nfsd: Fix up some unused variable warnings nfsd: close cached files prior to a REMOVE or RENAME that would replace target nfsd: rip out the raparms cache nfsd: have nfsd_test_lock use the nfsd_file cache nfsd: hook up nfs4_preprocess_stateid_op to the nfsd_file cache ...
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- 27 Sep, 2019 15 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuseLinus Torvalds authored
Pull fuse virtio-fs support from Miklos Szeredi: "Virtio-fs allows exporting directory trees on the host and mounting them in guest(s). This isn't actually a new filesystem, but a glue layer between the fuse filesystem and a virtio based back-end. It's similar in functionality to the existing virtio-9p solution, but significantly faster in benchmarks and has better POSIX compliance. Further permformance improvements can be achieved by sharing the page cache between host and guest, allowing for faster I/O and reduced memory use. Kata Containers have been including the out-of-tree virtio-fs (with the shared page cache patches as well) since version 1.7 as an experimental feature. They have been active in development and plan to switch from virtio-9p to virtio-fs as their default solution. There has been interest from other sources as well. The userspace infrastructure is slated to be merged into qemu once the kernel part hits mainline. This was developed by Vivek Goyal, Dave Gilbert and Stefan Hajnoczi" * tag 'virtio-fs-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: virtio-fs: add virtiofs filesystem virtio-fs: add Documentation/filesystems/virtiofs.rst fuse: reserve values for mapping protocol
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git://github.com/martinetd/linuxLinus Torvalds authored
Pull 9p updates from Dominique Martinet: "Some of the usual small fixes and cleanup. Small fixes all around: - avoid overlayfs copy-up for PRIVATE mmaps - KUMSAN uninitialized warning for transport error - one syzbot memory leak fix in 9p cache - internal API cleanup for v9fs_fill_super" * tag '9p-for-5.4' of git://github.com/martinetd/linux: 9p/vfs_super.c: Remove unused parameter data in v9fs_fill_super 9p/cache.c: Fix memory leak in v9fs_cache_session_get_cookie 9p: Transport error uninitialized 9p: avoid attaching writeback_fid on mmap with type PRIVATE
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linuxLinus Torvalds authored
Pull more RISC-V updates from Paul Walmsley: "Some additional RISC-V updates. This includes one significant fix: - Prevent interrupts from being unconditionally re-enabled during exception handling if they were disabled in the context in which the exception occurred Also a few other fixes: - Fix a build error when sparse memory support is manually enabled - Prevent CPUs beyond CONFIG_NR_CPUS from being enabled in early boot And a few minor improvements: - DT improvements: in the FU540 SoC DT files, improve U-Boot compatibility by adding an "ethernet0" alias, drop an unnecessary property from the DT files, and add support for the PWM device - KVM preparation: add a KVM-related macro for future RISC-V KVM support, and export some symbols required to build KVM support as modules - defconfig additions: build more drivers by default for QEMU configurations" * tag 'riscv/for-v5.4-rc1-b' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: riscv: Avoid interrupts being erroneously enabled in handle_exception() riscv: dts: sifive: Drop "clock-frequency" property of cpu nodes riscv: dts: sifive: Add ethernet0 to the aliases node RISC-V: Export kernel symbols for kvm KVM: RISC-V: Add KVM_REG_RISCV for ONE_REG interface arch/riscv: disable excess harts before picking main boot hart RISC-V: Enable VIRTIO drivers in RV64 and RV32 defconfig RISC-V: Fix building error when CONFIG_SPARSEMEM_MANUAL=y riscv: dts: Add DT support for SiFive FU540 PWM driver
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git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2Linus Torvalds authored
Pull nios2 fix from Ley Foon Tan: "Make sure the command line buffer is NUL-terminated" * tag 'nios2-v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2: nios2: force the string buffer NULL-terminated
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull more KVM updates from Paolo Bonzini: "x86 KVM changes: - The usual accuracy improvements for nested virtualization - The usual round of code cleanups from Sean - Added back optimizations that were prematurely removed in 5.2 (the bare minimum needed to fix the regression was in 5.3-rc8, here comes the rest) - Support for UMWAIT/UMONITOR/TPAUSE - Direct L2->L0 TLB flushing when L0 is Hyper-V and L1 is KVM - Tell Windows guests if SMT is disabled on the host - More accurate detection of vmexit cost - Revert a pvqspinlock pessimization" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (56 commits) KVM: nVMX: cleanup and fix host 64-bit mode checks KVM: vmx: fix build warnings in hv_enable_direct_tlbflush() on i386 KVM: x86: Don't check kvm_rebooting in __kvm_handle_fault_on_reboot() KVM: x86: Drop ____kvm_handle_fault_on_reboot() KVM: VMX: Add error handling to VMREAD helper KVM: VMX: Optimize VMX instruction error and fault handling KVM: x86: Check kvm_rebooting in kvm_spurious_fault() KVM: selftests: fix ucall on x86 Revert "locking/pvqspinlock: Don't wait if vCPU is preempted" kvm: nvmx: limit atomic switch MSRs kvm: svm: Intercept RDPRU kvm: x86: Add "significant index" flag to a few CPUID leaves KVM: x86/mmu: Skip invalid pages during zapping iff root_count is zero KVM: x86/mmu: Explicitly track only a single invalid mmu generation KVM: x86/mmu: Revert "KVM: x86/mmu: Remove is_obsolete() call" KVM: x86/mmu: Revert "Revert "KVM: MMU: reclaim the zapped-obsolete page first"" KVM: x86/mmu: Revert "Revert "KVM: MMU: collapse TLB flushes when zap all pages"" KVM: x86/mmu: Revert "Revert "KVM: MMU: zap pages in batch"" KVM: x86/mmu: Revert "Revert "KVM: MMU: add tracepoint for kvm_mmu_invalidate_all_pages"" KVM: x86/mmu: Revert "Revert "KVM: MMU: show mmu_valid_gen in shadow page related tracepoints"" ...
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Linus Torvalds authored
Merge tag 'pwm/for-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm updates from Thierry Reding: "Besides one new driver being added for the PWM controller found in various Spreadtrum SoCs, this series of changes brings a slew of, mostly minor, fixes and cleanups for existing drivers, as well as some enhancements to the core code. Lastly, Uwe is added to the PWM subsystem entry of the MAINTAINERS file, making official his role as a reviewer" * tag 'pwm/for-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (34 commits) MAINTAINERS: Add myself as reviewer for the PWM subsystem MAINTAINERS: Add patchwork link for PWM entry MAINTAINERS: Add a selection of PWM related keywords to the PWM entry pwm: mediatek: Add MT7629 compatible string dt-bindings: pwm: Update bindings for MT7629 SoC pwm: mediatek: Update license and switch to SPDX tag pwm: mediatek: Use pwm_mediatek as common prefix pwm: mediatek: Allocate the clks array dynamically pwm: mediatek: Remove the has_clks field pwm: mediatek: Drop the check for of_device_get_match_data() pwm: atmel: Consolidate driver data initialization pwm: atmel: Remove unneeded check for match data pwm: atmel: Remove platform_device_id and use only dt bindings pwm: stm32-lp: Add check in case requested period cannot be achieved pwm: Ensure pwm_apply_state() doesn't modify the state argument pwm: fsl-ftm: Don't update the state for the caller of pwm_apply_state() pwm: sun4i: Don't update the state for the caller of pwm_apply_state() pwm: rockchip: Don't update the state for the caller of pwm_apply_state() pwm: Let pwm_get_state() return the last implemented state pwm: Introduce local struct pwm_chip in pwm_apply_state() ...
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull more io_uring updates from Jens Axboe: "Just two things in here: - Improvement to the io_uring CQ ring wakeup for batched IO (me) - Fix wrong comparison in poll handling (yangerkun) I realize the first one is a little late in the game, but it felt pointless to hold it off until the next release. Went through various testing and reviews with Pavel and peterz" * tag 'for-5.4/io_uring-2019-09-27' of git://git.kernel.dk/linux-block: io_uring: make CQ ring wakeups be more efficient io_uring: compare cached_cq_tail with cq.head in_io_uring_poll
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull block fixes from Jens Axboe: "A few fixes/changes to round off this merge window. This contains: - Small series making some functional tweaks to blk-iocost (Tejun) - Elevator switch locking fix (Ming) - Kill redundant call in blk-wbt (Yufen) - Fix flush timeout handling (Yufen)" * tag 'for-linus-2019-09-27' of git://git.kernel.dk/linux-block: block: fix null pointer dereference in blk_mq_rq_timed_out() rq-qos: get rid of redundant wbt_update_limits() iocost: bump up default latency targets for hard disks iocost: improve nr_lagging handling iocost: better trace vrate changes block: don't release queue's sysfs lock during switching elevator blk-mq: move lockdep_assert_held() into elevator_exit
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git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linuxLinus Torvalds authored
Pull thermal management updates from Zhang Rui: - Add Amit Kucheria as thermal subsystem Reviewer (Amit Kucheria) - Fix a use after free bug when unregistering thermal zone devices (Ido Schimmel) - Fix thermal core framework to use put_device() when device_register() fails (Yue Hu) - Enable intel_pch_thermal and MMIO RAPL support for Intel Icelake platform (Srinivas Pandruvada) - Add clock operations in qorip thermal driver, for some platforms with clock control like i.MX8MQ (Anson Huang) - A couple of trivial fixes and cleanups for thermal core and different soc thermal drivers (Amit Kucheria, Christophe JAILLET, Chuhong Yuan, Fuqian Huang, Kelsey Skunberg, Nathan Huckleberry, Rishi Gupta, Srinivas Kandagatla) * 'for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: MAINTAINERS: Add Amit Kucheria as reviewer for thermal thermal: Add some error messages thermal: Fix use-after-free when unregistering thermal zone device thermal/drivers/core: Use put_device() if device_register() fails thermal_hwmon: Sanitize thermal_zone type thermal: intel: Use dev_get_drvdata thermal: intel: int3403: replace printk(KERN_WARN...) with pr_warn(...) thermal: intel: int340x_thermal: Remove unnecessary acpi_has_method() uses thermal: int340x: processor_thermal: Add Ice Lake support drivers: thermal: qcom: tsens: Fix memory leak from qfprom read thermal: tegra: Fix a typo thermal: rcar_gen3_thermal: Replace devm_add_action() followed by failure action with devm_add_action_or_reset() thermal: armada: Fix -Wshift-negative-value dt-bindings: thermal: qoriq: Add optional clocks property thermal: qoriq: Use __maybe_unused instead of #if CONFIG_PM_SLEEP thermal: qoriq: Use devm_platform_ioremap_resource() instead of of_iomap() thermal: qoriq: Fix error path of calling qoriq_tmu_register_tmu_zone fail thermal: qoriq: Add clock operations drivers: thermal: processor_thermal_device: Export sysfs interface for TCC offset
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git://www.linux-watchdog.org/linux-watchdogLinus Torvalds authored
Pull watchdog updates from Wim Van Sebroeck: - addition of AST2600, i.MX7ULP and F81803 watchdog support - removal of the w90x900 and ks8695 drivers - ziirave_wdt improvements - small fixes and improvements * tag 'linux-watchdog-5.4-rc1' of git://www.linux-watchdog.org/linux-watchdog: (51 commits) watchdog: f71808e_wdt: Add F81803 support watchdog: qcom: remove unnecessary variable from private storage watchdog: qcom: support pre-timeout when the bark irq is available watchdog: imx_sc: this patch just fixes whitespaces watchdog: apseed: Add access_cs0 option for alt-boot watchdog: aspeed: add support for dual boot watchdog: orion_wdt: use timer1 as a pretimeout watchdog: Add i.MX7ULP watchdog support dt-bindings: watchdog: Add i.MX7ULP bindings dt-bindings: watchdog: sun4i: Add the watchdog clock dt-bindings: watchdog: sun4i: Add the watchdog interrupts dt-bindings: watchdog: Convert Allwinner watchdog to a schema dt-bindings: watchdog: Add YAML schemas for the generic watchdog bindings watchdog: aspeed: Add support for AST2600 dt-bindings: watchdog: Add ast2600 compatible watchdog: ziirave_wdt: Update checked I2C functionality mask watchdog: ziirave_wdt: Drop ziirave_firm_write_block_data() watchdog: ziirave_wdt: Fix DOWNLOAD_START payload watchdog: ziirave_wdt: Drop status polling code watchdog: ziirave_wdt: Fix RESET_PROCESSOR payload ...
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git://anongit.freedesktop.org/drm/drmLinus Torvalds authored
Pull drm fixes from Dave Airlie: "Fixes built up over the past 1.5 weeks or so, it's two weeks of amdgpu, some core cleanups and some panfrost fixes. I also finally figured out why my desktop was slow to do a bunch of stuff (someone gave it an IPv6 address which can't reach anything!). core: - Some cleanups and fixes in the self-refresh helpers - Some cleanups and fixes in the atomic helpers amdgpu: - Fix a 64 bit divide - Prevent a memory leak in a failure case in dc - Load proper gfx firmware on navi14 variants - Add more navi12 and navi14 PCI ids - Misc fixes for renoir - Fix bandwidth issues with multiple displays on vega20 - Support for Dali - Fix a possible oops with KFD on hawaii - Fix for backlight level after resume on some APUs - Other misc fixes panfrost: - Multiple panfrost fixes for regulator support and page fault handling" * tag 'drm-next-2019-09-27' of git://anongit.freedesktop.org/drm/drm: (34 commits) drm/amd/display: prevent memory leak drm/amdgpu/gfx10: add support for wks firmware loading drm/amdgpu/display: include slab.h in dcn21_resource.c drm/amdgpu/display: fix 64 bit divide drm/panfrost: Prevent race when handling page fault drm/panfrost: Remove NULL checks for regulator drm/panfrost: Fix regulator_get_optional() misuse drm: Measure Self Refresh Entry/Exit times to avoid thrashing drm: Fix kerneldoc and remove unused struct member in self_refresh helper drm/atomic: Rename crtc_state->pageflip_flags to async_flip drm/atomic: Reject FLIP_ASYNC unconditionally drm/atomic: Take the atomic toys away from X drm/amdgpu: flag navi12 and 14 as experimental for 5.4 drm/kms: Duct-tape for mode object lifetime checks drm/amdgpu: add navi12 pci id drm/amdgpu: add navi14 PCI ID for work station SKU drm/amdkfd: Swap trap temporary registers in gfx10 trap handler drm/amd/powerplay: implement sysfs for getting dpm clock drm/amd/display: Restore backlight brightness after system resume drm/amd/display: Implement voltage limitation for dali ...
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git://github.com/jonmason/ntbLinus Torvalds authored
Pull NTB updates from Jon Mason: "A few bugfixes and support for new AMD NTB hardware" * tag 'ntb-5.4' of git://github.com/jonmason/ntb: NTB: fix IDT Kconfig typos/spellos ntb_hw_amd: Add memory window support for new AMD hardware ntb_hw_amd: Add a new NTB PCI device ID NTB: ntb_transport: remove redundant assignment to rc ntb_hw_switchtec: make ntb_mw_set_trans() work when addr == 0 ntb: point to right memory window index
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Jarkko Sakkinen authored
To address a major procedural concern on Linus's part the keyrings needs a co-maintainer. Suggested-by: David Howells <dhowells@redhat.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Yufen Yu authored
We got a null pointer deference BUG_ON in blk_mq_rq_timed_out() as following: [ 108.825472] BUG: kernel NULL pointer dereference, address: 0000000000000040 [ 108.827059] PGD 0 P4D 0 [ 108.827313] Oops: 0000 [#1] SMP PTI [ 108.827657] CPU: 6 PID: 198 Comm: kworker/6:1H Not tainted 5.3.0-rc8+ #431 [ 108.829503] Workqueue: kblockd blk_mq_timeout_work [ 108.829913] RIP: 0010:blk_mq_check_expired+0x258/0x330 [ 108.838191] Call Trace: [ 108.838406] bt_iter+0x74/0x80 [ 108.838665] blk_mq_queue_tag_busy_iter+0x204/0x450 [ 108.839074] ? __switch_to_asm+0x34/0x70 [ 108.839405] ? blk_mq_stop_hw_queue+0x40/0x40 [ 108.839823] ? blk_mq_stop_hw_queue+0x40/0x40 [ 108.840273] ? syscall_return_via_sysret+0xf/0x7f [ 108.840732] blk_mq_timeout_work+0x74/0x200 [ 108.841151] process_one_work+0x297/0x680 [ 108.841550] worker_thread+0x29c/0x6f0 [ 108.841926] ? rescuer_thread+0x580/0x580 [ 108.842344] kthread+0x16a/0x1a0 [ 108.842666] ? kthread_flush_work+0x170/0x170 [ 108.843100] ret_from_fork+0x35/0x40 The bug is caused by the race between timeout handle and completion for flush request. When timeout handle function blk_mq_rq_timed_out() try to read 'req->q->mq_ops', the 'req' have completed and reinitiated by next flush request, which would call blk_rq_init() to clear 'req' as 0. After commit 12f5b931 ("blk-mq: Remove generation seqeunce"), normal requests lifetime are protected by refcount. Until 'rq->ref' drop to zero, the request can really be free. Thus, these requests cannot been reused before timeout handle finish. However, flush request has defined .end_io and rq->end_io() is still called even if 'rq->ref' doesn't drop to zero. After that, the 'flush_rq' can be reused by the next flush request handle, resulting in null pointer deference BUG ON. We fix this problem by covering flush request with 'rq->ref'. If the refcount is not zero, flush_end_io() return and wait the last holder recall it. To record the request status, we add a new entry 'rq_status', which will be used in flush_end_io(). Cc: Christoph Hellwig <hch@infradead.org> Cc: Keith Busch <keith.busch@intel.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: stable@vger.kernel.org # v4.18+ Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Bob Liu <bob.liu@oracle.com> Signed-off-by: Yufen Yu <yuyufen@huawei.com> ------- v2: - move rq_status from struct request to struct blk_flush_queue v3: - remove unnecessary '{}' pair. v4: - let spinlock to protect 'fq->rq_status' v5: - move rq_status after flush_running_idx member of struct blk_flush_queue Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Yufen Yu authored
We have updated limits after calling wbt_set_min_lat(). No need to update again. Reviewed-by: Bob Liu <bob.liu@oracle.com> Signed-off-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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- 26 Sep, 2019 21 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer fix from Ingo Molnar: "Fix a timer expiry bug that would cause spurious delay of timers" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: timer: Read jiffies once when forwarding base clk
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull more perf updates from Ingo Molnar: "The only kernel change is comment typo fixes. The rest is mostly tooling fixes, but also new vendor event additions and updates, a bigger libperf/libtraceevent library and a header files reorganization that came in a bit late" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (108 commits) perf unwind: Fix libunwind build failure on i386 systems perf parser: Remove needless include directives perf build: Add detection of java-11-openjdk-devel package perf jvmti: Include JVMTI support for s390 perf vendor events: Remove P8 HW events which are not supported perf evlist: Fix access of freed id arrays perf stat: Fix free memory access / memory leaks in metrics perf tools: Replace needless mmap.h with what is needed, event.h perf evsel: Move config terms to a separate header perf evlist: Remove unused perf_evlist__fprintf() method perf evsel: Introduce evsel_fprintf.h perf evsel: Remove need for symbol_conf in evsel_fprintf.c perf copyfile: Move copyfile routines to separate files libperf: Add perf_evlist__poll() function libperf: Add perf_evlist__add_pollfd() function libperf: Add perf_evlist__alloc_pollfd() function libperf: Add libperf_init() call to the tests libperf: Merge libperf_set_print() into libperf_init() libperf: Add libperf dependency for tests targets libperf: Use sys/types.h to get ssize_t, not unistd.h ...
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds authored
Pull tracing fix from Steven Rostedt: "Srikar Dronamraju fixed a bug in the newmulti probe code" * tag 'trace-v5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing/probe: Fix same probe event argument matching
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Arnaldo Carvalho de Melo authored
Naresh Kamboju reported, that on the i386 build pr_err() doesn't get defined properly due to header ordering: perf-in.o: In function `libunwind__x86_reg_id': tools/perf/util/libunwind/../../arch/x86/util/unwind-libunwind.c:109: undefined reference to `pr_err' Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/kees/linuxLinus Torvalds authored
Pull usercopy fix from Kees Cook: "Fix hardened usercopy under CONFIG_DEBUG_VIRTUAL" * tag 'usercopy-v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: usercopy: Avoid HIGHMEM pfn warning
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Linus Torvalds authored
Merge tag 'linux-kselftest-5.4-rc1.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull Kselftest updates from Shuah Khan: "Fixes to existing tests" * tag 'linux-kselftest-5.4-rc1.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests: tpm2: install python files selftests: livepatch: add missing fragments to config selftests: watchdog: cleanup whitespace in usage options selftest/ftrace: Fix typo in trigger-snapshot.tc selftests: watchdog: Add optional file argument selftests/seccomp: fix build on older kernels selftests: use "$(MAKE)" instead of "make"
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git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds authored
Pull NFS client updates from Anna Schumaker: "Stable bugfixes: - Dequeue the request from the receive queue while we're re-encoding # v4.20+ - Fix buffer handling of GSS MIC without slack # 5.1 Features: - Increase xprtrdma maximum transport header and slot table sizes - Add support for nfs4_call_sync() calls using a custom rpc_task_struct - Optimize the default readahead size - Enable pNFS filelayout LAYOUTGET on OPEN Other bugfixes and cleanups: - Fix possible null-pointer dereferences and memory leaks - Various NFS over RDMA cleanups - Various NFS over RDMA comment updates - Don't receive TCP data into a reset request buffer - Don't try to parse incomplete RPC messages - Fix congestion window race with disconnect - Clean up pNFS return-on-close error handling - Fixes for NFS4ERR_OLD_STATEID handling" * tag 'nfs-for-5.4-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (53 commits) pNFS/filelayout: enable LAYOUTGET on OPEN NFS: Optimise the default readahead size NFSv4: Handle NFS4ERR_OLD_STATEID in LOCKU NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE NFSv4: Fix OPEN_DOWNGRADE error handling pNFS: Handle NFS4ERR_OLD_STATEID on layoutreturn by bumping the state seqid NFSv4: Add a helper to increment stateid seqids NFSv4: Handle RPC level errors in LAYOUTRETURN NFSv4: Handle NFS4ERR_DELAY correctly in return-on-close NFSv4: Clean up pNFS return-on-close error handling pNFS: Ensure we do clear the return-on-close layout stateid on fatal errors NFS: remove unused check for negative dentry NFSv3: use nfs_add_or_obtain() to create and reference inodes NFS: Refactor nfs_instantiate() for dentry referencing callers SUNRPC: Fix congestion window race with disconnect SUNRPC: Don't try to parse incomplete RPC messages SUNRPC: Rename xdr_buf_read_netobj to xdr_buf_read_mic SUNRPC: Fix buffer handling of GSS MIC without slack SUNRPC: RPC level errors should always set task->tk_rpc_status SUNRPC: Don't receive TCP data into a request buffer that has been reset ...
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Kees Cook authored
When brk was moved for binaries without an interpreter, it should have been limited to ET_DYN only. In other words, the special case was an ET_DYN that lacks an INTERP, not just an executable that lacks INTERP. The bug manifested for giant static executables, where the brk would end up in the middle of the text area on 32-bit architectures. Reported-and-tested-by: Richard Kojedzinszky <richard@kojedz.in> Fixes: bbdc6076 ("binfmt_elf: move brk out of mmap when doing direct loader exec") Cc: stable@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds authored
Pull xfs fixes from Darrick Wong: "There are a couple of bug fixes and some small code cleanups that came in recently: - Minor code cleanups - Fix a superblock logging error - Ensure that collapse range converts the data fork to extents format when necessary - Revert the ALLOC_USERDATA cleanup because it caused subtle behavior regressions" * tag 'xfs-5.4-merge-8' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: avoid unused to_mp() function warning xfs: log proper length of superblock xfs: revert 1baa2800 ("xfs: remove the unused XFS_ALLOC_USERDATA flag") xfs: removed unneeded variable xfs: convert inode to extent format after extent merge due to shift
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull jffs2 fix from Al Viro: "braino fix for mount API conversion for jffs2" * 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: jffs2: Fix mounting under new mount API
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds authored
Pull more s390 updates from Vasily Gorbik: - Fix three kasan findings - Add PERF_EVENT_IOC_PERIOD ioctl support - Add Crypto Express7S support and extend sysfs attributes for pkey - Minor common I/O layer documentation corrections * tag 's390-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/cio: exclude subchannels with no parent from pseudo check s390/cio: avoid calling strlen on null pointer s390/topology: avoid firing events before kobjs are created s390/cpumf: Remove mixed white space s390/cpum_sf: Support ioctl PERF_EVENT_IOC_PERIOD s390/zcrypt: CEX7S exploitation support s390/cio: fix intparm documentation s390/pkey: Add sysfs attributes to emit AES CIPHER key blobs
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tipLinus Torvalds authored
Pull xen update from Juergen Gross: "Only two small patches this time: - a small cleanup for swiotlb-xen - a fix for PCI initialization for some platforms" * tag 'for-linus-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/pci: reserve MCFG areas earlier swiotlb-xen: Convert to use macro
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Linus Torvalds authored
Merge more updates from Andrew Morton: - almost all of the rest of -mm - various other subsystems Subsystems affected by this patch series: memcg, misc, core-kernel, lib, checkpatch, reiserfs, fat, fork, cpumask, kexec, uaccess, kconfig, kgdb, bug, ipc, lzo, kasan, madvise, cleanups, pagemap * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (77 commits) arch/sparc/include/asm/pgtable_64.h: fix build mm: treewide: clarify pgtable_page_{ctor,dtor}() naming ntfs: remove (un)?likely() from IS_ERR() conditions IB/hfi1: remove unlikely() from IS_ERR*() condition xfs: remove unlikely() from WARN_ON() condition wimax/i2400m: remove unlikely() from WARN*() condition fs: remove unlikely() from WARN_ON() condition xen/events: remove unlikely() from WARN() condition checkpatch: check for nested (un)?likely() calls hexagon: drop empty and unused free_initrd_mem mm: factor out common parts between MADV_COLD and MADV_PAGEOUT mm: introduce MADV_PAGEOUT mm: change PAGEREF_RECLAIM_CLEAN with PAGE_REFRECLAIM mm: introduce MADV_COLD mm: untag user pointers in mmap/munmap/mremap/brk vfio/type1: untag user pointers in vaddr_get_pfn tee/shm: untag user pointers in tee_shm_register media/v4l2-core: untag user pointers in videobuf_dma_contig_user_get drm/radeon: untag user pointers in radeon_gem_userptr_ioctl drm/amdgpu: untag user pointers ...
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Andrew Morton authored
A last-minute fixlet which I'd failed to merge at the appropriate time had the predictable effect. Fixes: f672e2c217e2d4b2 ("lib: untag user pointers in strn*_user") Cc: Andrey Konovalov <andreyknvl@google.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Mark Rutland authored
The naming of pgtable_page_{ctor,dtor}() seems to have confused a few people, and until recently arm64 used these erroneously/pointlessly for other levels of page table. To make it incredibly clear that these only apply to the PTE level, and to align with the naming of pgtable_pmd_page_{ctor,dtor}(), let's rename them to pgtable_pte_page_{ctor,dtor}(). These changes were generated with the following shell script: ---- git grep -lw 'pgtable_page_.tor' | while read FILE; do sed -i '{s/pgtable_page_ctor/pgtable_pte_page_ctor/}' $FILE; sed -i '{s/pgtable_page_dtor/pgtable_pte_page_dtor/}' $FILE; done ---- ... with the documentation re-flowed to remain under 80 columns, and whitespace fixed up in macros to keep backslashes aligned. There should be no functional change as a result of this patch. Link: http://lkml.kernel.org/r/20190722141133.3116-1-mark.rutland@arm.comSigned-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Yu Zhao <yuzhao@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Denis Efremov authored
"likely(!IS_ERR(x))" is excessive. IS_ERR() already uses unlikely() internally. Link: http://lkml.kernel.org/r/20190829165025.15750-11-efremov@linux.comSigned-off-by: Denis Efremov <efremov@linux.com> Cc: Anton Altaparmakov <anton@tuxera.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Denis Efremov authored
"unlikely(IS_ERR_OR_NULL(x))" is excessive. IS_ERR_OR_NULL() already uses unlikely() internally. Link: http://lkml.kernel.org/r/20190829165025.15750-8-efremov@linux.comSigned-off-by: Denis Efremov <efremov@linux.com> Cc: Mike Marciniszyn <mike.marciniszyn@intel.com> Cc: Joe Perches <joe@perches.com> Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Denis Efremov authored
"unlikely(WARN_ON(x))" is excessive. WARN_ON() already uses unlikely() internally. Link: http://lkml.kernel.org/r/20190829165025.15750-7-efremov@linux.comSigned-off-by: Denis Efremov <efremov@linux.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Denis Efremov authored
"unlikely(WARN_ON(x))" is excessive. WARN_ON() already uses unlikely() internally. Link: http://lkml.kernel.org/r/20190829165025.15750-6-efremov@linux.comSigned-off-by: Denis Efremov <efremov@linux.com> Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Denis Efremov authored
"unlikely(WARN_ON(x))" is excessive. WARN_ON() already uses unlikely() internally. Link: http://lkml.kernel.org/r/20190829165025.15750-5-efremov@linux.comSigned-off-by: Denis Efremov <efremov@linux.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Denis Efremov authored
"unlikely(WARN(x))" is excessive. WARN() already uses unlikely() internally. Link: http://lkml.kernel.org/r/20190829165025.15750-4-efremov@linux.comSigned-off-by: Denis Efremov <efremov@linux.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Joe Perches <joe@perches.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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