1. 04 Jul, 2020 5 commits
  2. 01 Jul, 2020 6 commits
  3. 30 Jun, 2020 1 commit
    • Sean Christopherson's avatar
      x86/split_lock: Don't write MSR_TEST_CTRL on CPUs that aren't whitelisted · 009bce1d
      Sean Christopherson authored
      Choo! Choo!  All aboard the Split Lock Express, with direct service to
      Wreckage!
      
      Skip split_lock_verify_msr() if the CPU isn't whitelisted as a possible
      SLD-enabled CPU model to avoid writing MSR_TEST_CTRL.  MSR_TEST_CTRL
      exists, and is writable, on many generations of CPUs.  Writing the MSR,
      even with '0', can result in bizarre, undocumented behavior.
      
      This fixes a crash on Haswell when resuming from suspend with a live KVM
      guest.  Because APs use the standard SMP boot flow for resume, they will
      go through split_lock_init() and the subsequent RDMSR/WRMSR sequence,
      which runs even when sld_state==sld_off to ensure SLD is disabled.  On
      Haswell (at least, my Haswell), writing MSR_TEST_CTRL with '0' will
      succeed and _may_ take the SMT _sibling_ out of VMX root mode.
      
      When KVM has an active guest, KVM performs VMXON as part of CPU onlining
      (see kvm_starting_cpu()).  Because SMP boot is serialized, the resulting
      flow is effectively:
      
        on_each_ap_cpu() {
           WRMSR(MSR_TEST_CTRL, 0)
           VMXON
        }
      
      As a result, the WRMSR can disable VMX on a different CPU that has
      already done VMXON.  This ultimately results in a #UD on VMPTRLD when
      KVM regains control and attempt run its vCPUs.
      
      The above voodoo was confirmed by reworking KVM's VMXON flow to write
      MSR_TEST_CTRL prior to VMXON, and to serialize the sequence as above.
      Further verification of the insanity was done by redoing VMXON on all
      APs after the initial WRMSR->VMXON sequence.  The additional VMXON,
      which should VM-Fail, occasionally succeeded, and also eliminated the
      unexpected #UD on VMPTRLD.
      
      The damage done by writing MSR_TEST_CTRL doesn't appear to be limited
      to VMX, e.g. after suspend with an active KVM guest, subsequent reboots
      almost always hang (even when fudging VMXON), a #UD on a random Jcc was
      observed, suspend/resume stability is qualitatively poor, and so on and
      so forth.
      
        kernel BUG at arch/x86/kvm/x86.c:386!
        CPU: 1 PID: 2592 Comm: CPU 6/KVM Tainted: G      D
        Hardware name: ASUS Q87M-E/Q87M-E, BIOS 1102 03/03/2014
        RIP: 0010:kvm_spurious_fault+0xf/0x20
        Call Trace:
         vmx_vcpu_load_vmcs+0x1fb/0x2b0
         vmx_vcpu_load+0x3e/0x160
         kvm_arch_vcpu_load+0x48/0x260
         finish_task_switch+0x140/0x260
         __schedule+0x460/0x720
         _cond_resched+0x2d/0x40
         kvm_arch_vcpu_ioctl_run+0x82e/0x1ca0
         kvm_vcpu_ioctl+0x363/0x5c0
         ksys_ioctl+0x88/0xa0
         __x64_sys_ioctl+0x16/0x20
         do_syscall_64+0x4c/0x170
         entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      Fixes: dbaba470 ("x86/split_lock: Rework the initialization flow of split lock detection")
      Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: stable@vger.kernel.org
      Link: https://lkml.kernel.org/r/20200605192605.7439-1-sean.j.christopherson@intel.com
      009bce1d
  4. 29 Jun, 2020 1 commit
  5. 21 Jun, 2020 10 commits
    • Linus Torvalds's avatar
      Linux 5.8-rc2 · 48778464
      Linus Torvalds authored
      48778464
    • Linus Torvalds's avatar
      Merge tag 'selinux-pr-20200621' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux · 817d914d
      Linus Torvalds authored
      Pull SELinux fixes from Paul Moore:
       "Three small patches to fix problems in the SELinux code, all found via
        clang.
      
        Two patches fix potential double-free conditions and one fixes an
        undefined return value"
      
      * tag 'selinux-pr-20200621' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
        selinux: fix undefined return of cond_evaluate_expr
        selinux: fix a double free in cond_read_node()/cond_read_list()
        selinux: fix double free
      817d914d
    • Linus Torvalds's avatar
      Merge tag 'pinctrl-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl · 16f4aa9b
      Linus Torvalds authored
      Pull pin control fixes from Linus Walleij:
       "Some early fixes collected during the first week after the merge
        window, all pretty self-evident, with the details below. The revert is
        the crucial thing.
      
         - Fix a warning on the Qualcomm SPMI GPIO chip being instatiated
           twice without a unique irqchip struct
      
         - Use the noirq variants of the suspend and resume callbacks in the
           Tegra driver
      
         - Clean up the errorpath on the MCP23s08 driver
      
         - Revert the use of devm_of_iomap() in the Freescale driver as it was
           regressing the platform
      
         - Add some missing pins in the Qualcomm IPQ6018 driver
      
         - Fix a simple documentation bug in the pinctrl-single driver"
      
      * tag 'pinctrl-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
        pinctrl: single: fix function name in documentation
        pinctrl: qcom: ipq6018 Add missing pins in qpic pin group
        Revert "pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in case of error in 'imx_pinctrl_probe()'"
        pinctrl: mcp23s08: Split to three parts: fix ptr_ret.cocci warnings
        pinctrl: tegra: Use noirq suspend/resume callbacks
        pinctrl: qcom: spmi-gpio: fix warning about irq chip reusage
      16f4aa9b
    • Linus Torvalds's avatar
      Merge tag 'kbuild-fixes-v5.8' of... · be9160a9
      Linus Torvalds authored
      Merge tag 'kbuild-fixes-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
      
      Pull Kbuild fixes from Masahiro Yamada:
      
       - fix -gz=zlib compiler option test for CONFIG_DEBUG_INFO_COMPRESSED
      
       - improve cc-option in scripts/Kbuild.include to clean up temp files
      
       - improve cc-option in scripts/Kconfig.include for more reliable
         compile option test
      
       - do not copy modules.builtin by 'make install' because it would break
         existing systems
      
       - use 'userprogs' syntax for watch_queue sample
      
      * tag 'kbuild-fixes-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
        samples: watch_queue: build sample program for target architecture
        Revert "Makefile: install modules.builtin even if CONFIG_MODULES=n"
        scripts: Fix typo in headers_install.sh
        kconfig: unify cc-option and as-option
        kbuild: improve cc-option to clean up all temporary files
        Makefile: Improve compressed debug info support detection
      be9160a9
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 75613939
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
      
       - One fix for the interrupt rework we did last release which broke
         KVM-PR
      
       - Three commits fixing some fallout from the READ_ONCE() changes
         interacting badly with our 8xx 16K pages support, which uses a pte_t
         that is a structure of 4 actual PTEs
      
       - A cleanup of the 8xx pte_update() to use the newly added pmd_off()
      
       - A fix for a crash when handling an oops if CONFIG_DEBUG_VIRTUAL is
         enabled
      
       - A minor fix for the SPU syscall generation
      
      Thanks to Aneesh Kumar K.V, Christian Zigotzky, Christophe Leroy, Mike
      Rapoport, Nicholas Piggin.
      
      * tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/8xx: Provide ptep_get() with 16k pages
        mm: Allow arches to provide ptep_get()
        mm/gup: Use huge_ptep_get() in gup_hugepte()
        powerpc/syscalls: Use the number when building SPU syscall table
        powerpc/8xx: use pmd_off() to access a PMD entry in pte_update()
        powerpc/64s: Fix KVM interrupt using wrong save area
        powerpc: Fix kernel crash in show_instructions() w/DEBUG_VIRTUAL
      75613939
    • Linus Torvalds's avatar
      Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · 93bbca27
      Linus Torvalds authored
      Pull crypto fixes from Herbert Xu:
      
       - NULL dereference in octeontx
      
       - PM reference imbalance in ks-sa
      
       - deadlock in crypto manager
      
       - memory leak in drbg
      
       - missing socket limit check on receive SG list size in algif_skcipher
      
       - typos in caam
      
       - warnings in ccp and hisilicon
      
      * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
        crypto: drbg - always try to free Jitter RNG instance
        crypto: marvell/octeontx - Fix a potential NULL dereference
        crypto: algboss - don't wait during notifier callback
        crypto: caam - fix typos
        crypto: ccp - Fix sparse warnings in sev-dev
        crypto: hisilicon - Cap block size at 2^31
        crypto: algif_skcipher - Cap recv SG list at ctx->used
        hwrng: ks-sa - Fix runtime PM imbalance on error
      93bbca27
    • Masahiro Yamada's avatar
      samples: watch_queue: build sample program for target architecture · 214377e9
      Masahiro Yamada authored
      This userspace program includes UAPI headers exported to usr/include/.
      'make headers' always works for the target architecture (i.e. the same
      architecture as the kernel), so the sample program should be built for
      the target as well. Kbuild now supports 'userprogs' for that.
      
      I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because
      $(CC) may not provide libc.
      Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
      214377e9
    • Masahiro Yamada's avatar
      Revert "Makefile: install modules.builtin even if CONFIG_MODULES=n" · 2c6d9636
      Masahiro Yamada authored
      This reverts commit e0b250b5,
      which broke build systems that need to install files to a certain
      path, but do not set INSTALL_MOD_PATH when invoking 'make install'.
      
        $ make INSTALL_PATH=/tmp/destdir install
        mkdir: cannot create directory ‘/lib/modules/5.8.0-rc1+/’: Permission denied
        Makefile:1342: recipe for target '_builtin_inst_' failed
        make: *** [_builtin_inst_] Error 1
      
      While modules.builtin is useful also for CONFIG_MODULES=n, this change
      in the behavior is quite unexpected. Maybe "make modules_install"
      can install modules.builtin irrespective of CONFIG_MODULES as Jonas
      originally suggested.
      
      Anyway, that commit should be reverted ASAP.
      Reported-by: default avatarDouglas Anderson <dianders@chromium.org>
      Reported-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Cc: Jonas Karlman <jonas@kwiboo.se>
      Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
      Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Tested-by: default avatarGuenter Roeck <linux@roeck-us.net>
      2c6d9636
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 64677779
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "One minor fix and two patches reworking the ata dma drain for the
        !CONFIG_LIBATA case. The latter is a 5.7 regression fix"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: Wire up ata_scsi_dma_need_drain for SAS HBA drivers
        scsi: libata: Provide an ata_scsi_dma_need_drain stub for !CONFIG_ATA
        scsi: ufs-bsg: Fix runtime PM imbalance on error
      64677779
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · a5c6a1f0
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
      
       - a small collection of remaining API conversion patches (all acked)
         which allow to finally remove the deprecated API
      
       - some documentation fixes and a MAINTAINERS addition
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        MAINTAINERS: Add robert and myself as qcom i2c cci maintainers
        i2c: smbus: Fix spelling mistake in the comments
        Documentation/i2c: SMBus start signal is S not A
        i2c: remove deprecated i2c_new_device API
        Documentation: media: convert to use i2c_new_client_device()
        video: backlight: tosa_lcd: convert to use i2c_new_client_device()
        x86/platform/intel-mid: convert to use i2c_new_client_device()
        drm: encoder_slave: use new I2C API
        drm: encoder_slave: fix refcouting error for modules
      a5c6a1f0
  6. 20 Jun, 2020 13 commits
    • Drew Fustini's avatar
      pinctrl: single: fix function name in documentation · 25fae752
      Drew Fustini authored
      Use the correct the function name in the documentation for
      "pcs_parse_one_pinctrl_entry()".
      
      "smux_parse_one_pinctrl_entry()" appears to be an artifact from the
      development of a prior patch series ("simple pinmux driver") which
      transformed into pinctrl-single.
      Signed-off-by: default avatarDrew Fustini <drew@beagleboard.org>
      Link: https://lore.kernel.org/r/20200612112758.GA3407886@x1Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      25fae752
    • Linus Torvalds's avatar
      Merge tag 'trace-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 8b6ddd10
      Linus Torvalds authored
      Pull tracing fixes from Steven Rostedt:
      
       - Have recordmcount work with > 64K sections (to support LTO)
      
       - kprobe RCU fixes
      
       - Correct a kprobe critical section with missing mutex
      
       - Remove redundant arch_disarm_kprobe() call
      
       - Fix lockup when kretprobe triggers within kprobe_flush_task()
      
       - Fix memory leak in fetch_op_data operations
      
       - Fix sleep in atomic in ftrace trace array sample code
      
       - Free up memory on failure in sample trace array code
      
       - Fix incorrect reporting of function_graph fields in format file
      
       - Fix quote within quote parsing in bootconfig
      
       - Fix return value of bootconfig tool
      
       - Add testcases for bootconfig tool
      
       - Fix maybe uninitialized warning in ftrace pid file code
      
       - Remove unused variable in tracing_iter_reset()
      
       - Fix some typos
      
      * tag 'trace-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        ftrace: Fix maybe-uninitialized compiler warning
        tools/bootconfig: Add testcase for show-command and quotes test
        tools/bootconfig: Fix to return 0 if succeeded to show the bootconfig
        tools/bootconfig: Fix to use correct quotes for value
        proc/bootconfig: Fix to use correct quotes for value
        tracing: Remove unused event variable in tracing_iter_reset
        tracing/probe: Fix memleak in fetch_op_data operations
        trace: Fix typo in allocate_ftrace_ops()'s comment
        tracing: Make ftrace packed events have align of 1
        sample-trace-array: Remove trace_array 'sample-instance'
        sample-trace-array: Fix sleeping function called from invalid context
        kretprobe: Prevent triggering kretprobe from within kprobe_flush_task
        kprobes: Remove redundant arch_disarm_kprobe() call
        kprobes: Fix to protect kick_kprobe_optimizer() by kprobe_mutex
        kprobes: Use non RCU traversal APIs on kprobe_tables if possible
        kprobes: Suppress the suspicious RCU warning on kprobes
        recordmcount: support >64k sections
      8b6ddd10
    • Linus Torvalds's avatar
      Merge tag 'libnvdimm-for-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · eede2b9b
      Linus Torvalds authored
      Pull libnvdimm updates from Dan Williams:
       "A feature (papr_scm health retrieval) and a fix (sysfs attribute
        visibility) for v5.8.
      
        Vaibhav explains in the merge commit below why missing v5.8 would be
        painful and I agreed to try a -rc2 pull because only cosmetics kept
        this out of -rc1 and his initial versions were posted in more than
        enough time for v5.8 consideration:
      
         'These patches are tied to specific features that were committed to
          customers in upcoming distros releases (RHEL and SLES) whose
          time-lines are tied to 5.8 kernel release.
      
          Being able to track the health of an nvdimm is critical for our
          customers that are running workloads leveraging papr-scm nvdimms.
          Missing the 5.8 kernel would mean missing the distro timelines and
          shifting forward the availability of this feature in distro kernels
          by at least 6 months'
      
        Summary:
      
         - Fix the visibility of the region 'align' attribute.
      
           The new unit tests for region alignment handling caught a corner
           case where the alignment cannot be specified if the region is
           converted from static to dynamic provisioning at runtime.
      
         - Add support for device health retrieval for the persistent memory
           supported by the papr_scm driver.
      
           This includes both the standard sysfs "health flags" that the nfit
           persistent memory driver publishes and a mechanism for the ndctl
           tool to retrieve a health-command payload"
      
      * tag 'libnvdimm-for-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
        nvdimm/region: always show the 'align' attribute
        powerpc/papr_scm: Implement support for PAPR_PDSM_HEALTH
        ndctl/papr_scm,uapi: Add support for PAPR nvdimm specific methods
        powerpc/papr_scm: Improve error logging and handling papr_scm_ndctl()
        powerpc/papr_scm: Fetch nvdimm health information from PHYP
        seq_buf: Export seq_buf_printf
        powerpc: Document details on H_SCM_HEALTH hcall
      eede2b9b
    • Sivaprakash Murugesan's avatar
      pinctrl: qcom: ipq6018 Add missing pins in qpic pin group · 7f5f4de8
      Sivaprakash Murugesan authored
      The patch adds missing qpic data pins to qpic pingroup. These pins are
      necessary for the qpic nand to work.
      
      Fixes: ef1ea54e ("pinctrl: qcom: Add ipq6018 pinctrl driver")
      Signed-off-by: default avatarSivaprakash Murugesan <sivaprak@codeaurora.org>
      Link: https://lore.kernel.org/r/1592541089-17700-1-git-send-email-sivaprak@codeaurora.orgSigned-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      7f5f4de8
    • Haibo Chen's avatar
      Revert "pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource... · 13f2d25b
      Haibo Chen authored
      Revert "pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in case of error in 'imx_pinctrl_probe()'"
      
      This reverts commit ba403242.
      
      After commit 26d8cde5 ("pinctrl: freescale: imx: add shared
      input select reg support"). i.MX7D has two iomux controllers
      iomuxc and iomuxc-lpsr which share select_input register for
      daisy chain settings.
      If use 'devm_of_iomap()', when probe the iomuxc-lpsr, will call
      devm_request_mem_region() for the region <0x30330000-0x3033ffff>
      for the first time. Then, next time when probe the iomuxc, API
      devm_platform_ioremap_resource() will also use the API
      devm_request_mem_region() for the share region <0x30330000-0x3033ffff>
      again, then cause issue, log like below:
      
      [    0.179561] imx7d-pinctrl 302c0000.iomuxc-lpsr: initialized IMX pinctrl driver
      [    0.191742] imx7d-pinctrl 30330000.pinctrl: can't request region for resource [mem 0x30330000-0x3033ffff]
      [    0.191842] imx7d-pinctrl: probe of 30330000.pinctrl failed with error -16
      
      Fixes: ba403242 ("pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in case of error in 'imx_pinctrl_probe()'")
      Signed-off-by: default avatarHaibo Chen <haibo.chen@nxp.com>
      Reviewed-by: default avatarDong Aisheng <aisheng.dong@nxp.com>
      Link: https://lore.kernel.org/r/1591673223-1680-1-git-send-email-haibo.chen@nxp.comSigned-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      13f2d25b
    • Linus Torvalds's avatar
      Merge tag 's390-5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · 1566feea
      Linus Torvalds authored
      Pull s390 fixes from Vasily Gorbik:
      
       - a few ptrace fixes mostly for strace and seccomp_bpf kernel tests
         findings
      
       - cleanup unused pm callbacks in virtio ccw
      
       - replace kmalloc + memset with kzalloc in crypto
      
       - use $(LD) for vDSO linkage to make clang happy
      
       - fix vDSO clock_getres() to preserve the same behaviour as
         posix_get_hrtimer_res()
      
       - fix workqueue cpumask warning when NUMA=n and nr_node_ids=2
      
       - reduce SLSB writes during input processing, improve warnings and
         cleanup qdio_data usage in qdio
      
       - a few fixes to use scnprintf() instead of snprintf()
      
      * tag 's390-5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390: fix syscall_get_error for compat processes
        s390/qdio: warn about unexpected SLSB states
        s390/qdio: clean up usage of qdio_data
        s390/numa: let NODES_SHIFT depend on NEED_MULTIPLE_NODES
        s390/vdso: fix vDSO clock_getres()
        s390/vdso: Use $(LD) instead of $(CC) to link vDSO
        s390/protvirt: use scnprintf() instead of snprintf()
        s390: use scnprintf() in sys_##_prefix##_##_name##_show
        s390/crypto: use scnprintf() instead of snprintf()
        s390/zcrypt: use kzalloc
        s390/virtio: remove unused pm callbacks
        s390/qdio: reduce SLSB writes during Input Queue processing
        selftests/seccomp: s390 shares the syscall and return value register
        s390/ptrace: fix setting syscall number
        s390/ptrace: pass invalid syscall numbers to tracing
        s390/ptrace: return -ENOSYS when invalid syscall is supplied
        s390/seccomp: pass syscall arguments via seccomp_data
        s390/qdio: fine-tune SLSB update
      1566feea
    • Linus Torvalds's avatar
      Merge tag 'riscv-for-linus-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux · 7fdfbe08
      Linus Torvalds authored
      Pull RISC-V fixes from Palmer Dabbelt:
      
       - a workaround for a compiler surprise related to the "r" inline
         assembly that allows LLVM to boot.
      
       - a fix to avoid WX-only mappings, which the ISA does not allow. While
         this probably manifests in many ways, the bug was found in stress-ng.
      
       - a missing lock in set_direct_map_*(), which due to a recent lockdep
         change started asserting.
      
      * tag 'riscv-for-linus-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
        RISC-V: Acquire mmap lock before invoking walk_page_range
        RISC-V: Don't allow write+exec only page mapping request in mmap
        riscv/atomic: Fix sign extension for RV64I
      7fdfbe08
    • Linus Torvalds's avatar
      Merge tag 'linux-kselftest-5.8-rc2' of... · 27c27605
      Linus Torvalds authored
      Merge tag 'linux-kselftest-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
      
      Pull kselftest cleanups from Shuah Khan:
      
       - ftrace "requires:" list for simplifying and unifying requirement
         checks for each test case, adding "requires:" line instead of
         checking required ftrace interfaces in each test case.
      
       - a minor spelling correction patch
      
      * tag 'linux-kselftest-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
        selftests/ftrace: Support ":README" suffix for requires
        selftests/ftrace: Support ":tracer" suffix for requires
        selftests/ftrace: Convert check_filter_file() with requires list
        selftests/ftrace: Convert required interface checks into requires list
        selftests/ftrace: Add "requires:" list support
        selftests/ftrace: Return unsupported for the unconfigured features
        selftests/ftrace: Allow ":" in description
        tools: testing: ftrace: trigger: fix spelling mistake
      27c27605
    • David Howells's avatar
      afs: Fix hang on rmmod due to outstanding timer · 5481fc6e
      David Howells authored
      The fileserver probe timer, net->fs_probe_timer, isn't cancelled when
      the kafs module is being removed and so the count it holds on
      net->servers_outstanding doesn't get dropped..
      
      This causes rmmod to wait forever.  The hung process shows a stack like:
      
      	afs_purge_servers+0x1b5/0x23c [kafs]
      	afs_net_exit+0x44/0x6e [kafs]
      	ops_exit_list+0x72/0x93
      	unregister_pernet_operations+0x14c/0x1ba
      	unregister_pernet_subsys+0x1d/0x2a
      	afs_exit+0x29/0x6f [kafs]
      	__do_sys_delete_module.isra.0+0x1a2/0x24b
      	do_syscall_64+0x51/0x95
      	entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      Fix this by:
      
       (1) Attempting to cancel the probe timer and, if successful, drop the
           count that the timer was holding.
      
       (2) Make the timer function just drop the count and not schedule the
           prober if the afs portion of net namespace is being destroyed.
      
      Also, whilst we're at it, make the following changes:
      
       (3) Initialise net->servers_outstanding to 1 and decrement it before
           waiting on it so that it doesn't generate wake up events by being
           decremented to 0 until we're cleaning up.
      
       (4) Switch the atomic_dec() on ->servers_outstanding for ->fs_timer in
           afs_purge_servers() to use the helper function for that.
      
      Fixes: f6cbb368 ("afs: Actively poll fileservers to maintain NAT or firewall openings")
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5481fc6e
    • David Howells's avatar
      afs: Fix afs_do_lookup() to call correct fetch-status op variant · f8ea5c7b
      David Howells authored
      Fix afs_do_lookup()'s fallback case for when FS.InlineBulkStatus isn't
      supported by the server.
      
      In the fallback, it calls FS.FetchStatus for the specific vnode it's
      meant to be looking up.  Commit b6489a49 broke this by renaming one
      of the two identically-named afs_fetch_status_operation descriptors to
      something else so that one of them could be made non-static.  The site
      that used the renamed one, however, wasn't renamed and didn't produce
      any warning because the other was declared in a header.
      
      Fix this by making afs_do_lookup() use the renamed variant.
      
      Note that there are two variants of the success method because one is
      called from ->lookup() where we may or may not have an inode, but can't
      call iget until after we've talked to the server - whereas the other is
      called from within iget where we have an inode, but it may or may not be
      initialised.
      
      The latter variant expects there to be an inode, but because it's being
      called from there former case, there might not be - resulting in an oops
      like the following:
      
        BUG: kernel NULL pointer dereference, address: 00000000000000b0
        ...
        RIP: 0010:afs_fetch_status_success+0x27/0x7e
        ...
        Call Trace:
          afs_wait_for_operation+0xda/0x234
          afs_do_lookup+0x2fe/0x3c1
          afs_lookup+0x3c5/0x4bd
          __lookup_slow+0xcd/0x10f
          walk_component+0xa2/0x10c
          path_lookupat.isra.0+0x80/0x110
          filename_lookup+0x81/0x104
          vfs_statx+0x76/0x109
          __do_sys_newlstat+0x39/0x6b
          do_syscall_64+0x4c/0x78
          entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      Fixes: b6489a49 ("afs: Fix silly rename")
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      f8ea5c7b
    • Christophe Leroy's avatar
      powerpc/8xx: Provide ptep_get() with 16k pages · c0e1c8c2
      Christophe Leroy authored
      READ_ONCE() now enforces atomic read, which leads to:
      
        CC      mm/gup.o
      In file included from ./include/linux/kernel.h:11:0,
                       from mm/gup.c:2:
      In function 'gup_hugepte.constprop',
          inlined from 'gup_huge_pd.isra.79' at mm/gup.c:2465:8:
      ./include/linux/compiler.h:392:38: error: call to '__compiletime_assert_222' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().
        _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                            ^
      ./include/linux/compiler.h:373:4: note: in definition of macro '__compiletime_assert'
          prefix ## suffix();    \
          ^
      ./include/linux/compiler.h:392:2: note: in expansion of macro '_compiletime_assert'
        _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
        ^
      ./include/linux/compiler.h:405:2: note: in expansion of macro 'compiletime_assert'
        compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
        ^
      ./include/linux/compiler.h:291:2: note: in expansion of macro 'compiletime_assert_rwonce_type'
        compiletime_assert_rwonce_type(x);    \
        ^
      mm/gup.c:2428:8: note: in expansion of macro 'READ_ONCE'
        pte = READ_ONCE(*ptep);
              ^
      In function 'gup_get_pte',
          inlined from 'gup_pte_range' at mm/gup.c:2228:9,
          inlined from 'gup_pmd_range' at mm/gup.c:2613:15,
          inlined from 'gup_pud_range' at mm/gup.c:2641:15,
          inlined from 'gup_p4d_range' at mm/gup.c:2666:15,
          inlined from 'gup_pgd_range' at mm/gup.c:2694:15,
          inlined from 'internal_get_user_pages_fast' at mm/gup.c:2795:3:
      ./include/linux/compiler.h:392:38: error: call to '__compiletime_assert_219' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().
        _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                            ^
      ./include/linux/compiler.h:373:4: note: in definition of macro '__compiletime_assert'
          prefix ## suffix();    \
          ^
      ./include/linux/compiler.h:392:2: note: in expansion of macro '_compiletime_assert'
        _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
        ^
      ./include/linux/compiler.h:405:2: note: in expansion of macro 'compiletime_assert'
        compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
        ^
      ./include/linux/compiler.h:291:2: note: in expansion of macro 'compiletime_assert_rwonce_type'
        compiletime_assert_rwonce_type(x);    \
        ^
      mm/gup.c:2199:9: note: in expansion of macro 'READ_ONCE'
        return READ_ONCE(*ptep);
               ^
      make[2]: *** [mm/gup.o] Error 1
      
      Define ptep_get() on 8xx when using 16k pages.
      
      Fixes: 9e343b46 ("READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses")
      Signed-off-by: default avatarChristophe Leroy <christophe.leroy@csgroup.eu>
      Acked-by: default avatarWill Deacon <will@kernel.org>
      Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Link: https://lore.kernel.org/r/341688399c1b102756046d19ea6ce39db1ae4742.1592225558.git.christophe.leroy@csgroup.eu
      c0e1c8c2
    • Christophe Leroy's avatar
      mm: Allow arches to provide ptep_get() · 481e980a
      Christophe Leroy authored
      Since commit 9e343b46 ("READ_ONCE: Enforce atomicity for
      {READ,WRITE}_ONCE() memory accesses") it is not possible anymore to
      use READ_ONCE() to access complex page table entries like the one
      defined for powerpc 8xx with 16k size pages.
      
      Define a ptep_get() helper that architectures can override instead
      of performing a READ_ONCE() on the page table entry pointer.
      
      Fixes: 9e343b46 ("READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses")
      Signed-off-by: default avatarChristophe Leroy <christophe.leroy@csgroup.eu>
      Acked-by: default avatarWill Deacon <will@kernel.org>
      Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Link: https://lore.kernel.org/r/087fa12b6e920e32315136b998aa834f99242695.1592225558.git.christophe.leroy@csgroup.eu
      481e980a
    • Christophe Leroy's avatar
      mm/gup: Use huge_ptep_get() in gup_hugepte() · 55ca2263
      Christophe Leroy authored
      gup_hugepte() reads hugepage table entries, it can't read
      them directly, huge_ptep_get() must be used.
      
      Fixes: 9e343b46 ("READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses")
      Signed-off-by: default avatarChristophe Leroy <christophe.leroy@csgroup.eu>
      Acked-by: default avatarWill Deacon <will@kernel.org>
      Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Link: https://lore.kernel.org/r/ffc3714334c3bfaca6f13788ad039e8759ae413f.1592225558.git.christophe.leroy@csgroup.eu
      55ca2263
  7. 19 Jun, 2020 4 commits
    • Dan Williams's avatar
      Merge branch 'for-5.8/papr_scm' into libnvdimm-for-next · 9df24eae
      Dan Williams authored
      Include the papr_scm health retrieval feature for v5.8-rc2. The
      functionality was initially posted well in advance of the merge window,
      but review comments and a late build-bot warning kept them out of the
      v5.8-rc1 libnvdimm pull request.
      
      Vaibhav notes:
      These patches are tied to specific features that were committed to
      customers in upcoming distros releases (RHEL and SLES) whose time-lines
      are tied to 5.8 kernel release.
      
      Being able to track the health of an nvdimm is critical for our
      customers that are running workloads leveraging papr-scm nvdimms.
      Missing the 5.8 kernel would mean missing the distro timelines and
      shifting forward the availability of this feature in distro kernels by
      at least 6 months.
      9df24eae
    • Linus Torvalds's avatar
      Merge tag 'io_uring-5.8-2020-06-19' of git://git.kernel.dk/linux-block · 4333a9b0
      Linus Torvalds authored
      Pull io_uring fixes from Jens Axboe:
      
       - Catch a case where io_sq_thread() didn't do proper mm acquire
      
       - Ensure poll completions are reaped on shutdown
      
       - Async cancelation and run fixes (Pavel)
      
       - io-poll race fixes (Xiaoguang)
      
       - Request cleanup race fix (Xiaoguang)
      
      * tag 'io_uring-5.8-2020-06-19' of git://git.kernel.dk/linux-block:
        io_uring: fix possible race condition against REQ_F_NEED_CLEANUP
        io_uring: reap poll completions while waiting for refs to drop on exit
        io_uring: acquire 'mm' for task_work for SQPOLL
        io_uring: add memory barrier to synchronize io_kiocb's result and iopoll_completed
        io_uring: don't fail links for EAGAIN error in IOPOLL mode
        io_uring: cancel by ->task not pid
        io_uring: lazy get task
        io_uring: batch cancel in io_uring_cancel_files()
        io_uring: cancel all task's requests on exit
        io-wq: add an option to cancel all matched reqs
        io-wq: reorder cancellation pending -> running
        io_uring: fix lazy work init
      4333a9b0
    • Linus Torvalds's avatar
      Merge tag 'block-5.8-2020-06-19' of git://git.kernel.dk/linux-block · d2b1c81f
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
      
       - Use import_uuid() where appropriate (Andy)
      
       - bcache fixes (Coly, Mauricio, Zhiqiang)
      
       - blktrace sparse warnings fix (Jan)
      
       - blktrace concurrent setup fix (Luis)
      
       - blkdev_get use-after-free fix (Jason)
      
       - Ensure all blk-mq maps are updated (Weiping)
      
       - Loop invalidate bdev fix (Zheng)
      
      * tag 'block-5.8-2020-06-19' of git://git.kernel.dk/linux-block:
        block: make function 'kill_bdev' static
        loop: replace kill_bdev with invalidate_bdev
        partitions/ldm: Replace uuid_copy() with import_uuid() where it makes sense
        block: update hctx map when use multiple maps
        blktrace: Avoid sparse warnings when assigning q->blk_trace
        blktrace: break out of blktrace setup on concurrent calls
        block: Fix use-after-free in blkdev_get()
        trace/events/block.h: drop kernel-doc for dropped function parameter
        blk-mq: Remove redundant 'return' statement
        bcache: pr_info() format clean up in bcache_device_init()
        bcache: use delayed kworker fo asynchronous devices registration
        bcache: check and adjust logical block size for backing devices
        bcache: fix potential deadlock problem in btree_gc_coalesce
      d2b1c81f
    • Linus Torvalds's avatar
      Merge tag 'libata-5.8-2020-06-19' of git://git.kernel.dk/linux-block · 592be758
      Linus Torvalds authored
      Pull libata fixes from Jens Axboe:
       "A few minor changes that should go into this release"
      
      * tag 'libata-5.8-2020-06-19' of git://git.kernel.dk/linux-block:
        libata: Use per port sync for detach
        ata/libata: Fix usage of page address by page_address in ata_scsi_mode_select_xlat function
        sata_rcar: handle pm_runtime_get_sync failure cases
      592be758