1. 26 Mar, 2020 11 commits
  2. 06 Mar, 2020 1 commit
    • Atish Patra's avatar
      RISC-V: Move all address space definition macros to one place · 9f40b6e7
      Atish Patra authored
      If both CONFIG_KASAN and CONFIG_SPARSEMEM_VMEMMAP are set, we get the
      following compilation error.
      
      ---------------------------------------------------------------
      ./arch/riscv/include/asm/pgtable-64.h: In function ‘pud_page’:
      ./include/asm-generic/memory_model.h:54:29: error: ‘vmemmap’ undeclared
      (first use in this function); did you mean ‘mem_map’?
       #define __pfn_to_page(pfn) (vmemmap + (pfn))
                                   ^~~~~~~
      ./include/asm-generic/memory_model.h:82:21: note: in expansion of
      macro ‘__pfn_to_page’
      
       #define pfn_to_page __pfn_to_page
                           ^~~~~~~~~~~~~
      ./arch/riscv/include/asm/pgtable-64.h:70:9: note: in expansion of macro
      ‘pfn_to_page’
        return pfn_to_page(pud_val(pud) >> _PAGE_PFN_SHIFT);
      ---------------------------------------------------------------
      
      Fix the compliation errors by moving all the address space definition
      macros before including pgtable-64.h.
      
      Fixes: 8ad8b727 (riscv: Add KASAN support)
      Signed-off-by: default avatarAtish Patra <atish.patra@wdc.com>
      Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
      Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
      9f40b6e7
  3. 05 Mar, 2020 1 commit
  4. 03 Mar, 2020 7 commits
  5. 01 Mar, 2020 5 commits
  6. 29 Feb, 2020 4 commits
    • Dan Carpenter's avatar
      ext4: potential crash on allocation error in ext4_alloc_flex_bg_array() · 37b0b6b8
      Dan Carpenter authored
      If sbi->s_flex_groups_allocated is zero and the first allocation fails
      then this code will crash.  The problem is that "i--" will set "i" to
      -1 but when we compare "i >= sbi->s_flex_groups_allocated" then the -1
      is type promoted to unsigned and becomes UINT_MAX.  Since UINT_MAX
      is more than zero, the condition is true so we call kvfree(new_groups[-1]).
      The loop will carry on freeing invalid memory until it crashes.
      
      Fixes: 7c990728 ("ext4: fix potential race between s_flex_groups online resizing and access")
      Reviewed-by: default avatarSuraj Jitindar Singh <surajjs@amazon.com>
      Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Cc: stable@kernel.org
      Link: https://lore.kernel.org/r/20200228092142.7irbc44yaz3by7nb@kili.mountainSigned-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      37b0b6b8
    • Wolfram Sang's avatar
      macintosh: therm_windtunnel: fix regression when instantiating devices · 38b17afb
      Wolfram Sang authored
      Removing attach_adapter from this driver caused a regression for at
      least some machines. Those machines had the sensors described in their
      DT, too, so they didn't need manual creation of the sensor devices. The
      old code worked, though, because manual creation came first. Creation of
      DT devices then failed later and caused error logs, but the sensors
      worked nonetheless because of the manually created devices.
      
      When removing attach_adaper, manual creation now comes later and loses
      the race. The sensor devices were already registered via DT, yet with
      another binding, so the driver could not be bound to it.
      
      This fix refactors the code to remove the race and only manually creates
      devices if there are no DT nodes present. Also, the DT binding is updated
      to match both, the DT and manually created devices. Because we don't
      know which device creation will be used at runtime, the code to start
      the kthread is moved to do_probe() which will be called by both methods.
      
      Fixes: 3e7bed52 ("macintosh: therm_windtunnel: drop using attach_adapter")
      Link: https://bugzilla.kernel.org/show_bug.cgi?id=201723Reported-by: default avatarErhard Furtner <erhard_f@mailbox.org>
      Tested-by: default avatarErhard Furtner <erhard_f@mailbox.org>
      Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
      Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
      Cc: stable@kernel.org # v4.19+
      38b17afb
    • Qian Cai's avatar
      jbd2: fix data races at struct journal_head · 6c5d9112
      Qian Cai authored
      journal_head::b_transaction and journal_head::b_next_transaction could
      be accessed concurrently as noticed by KCSAN,
      
       LTP: starting fsync04
       /dev/zero: Can't open blockdev
       EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem
       EXT4-fs (loop0): mounted filesystem with ordered data mode. Opts: (null)
       ==================================================================
       BUG: KCSAN: data-race in __jbd2_journal_refile_buffer [jbd2] / jbd2_write_access_granted [jbd2]
      
       write to 0xffff99f9b1bd0e30 of 8 bytes by task 25721 on cpu 70:
        __jbd2_journal_refile_buffer+0xdd/0x210 [jbd2]
        __jbd2_journal_refile_buffer at fs/jbd2/transaction.c:2569
        jbd2_journal_commit_transaction+0x2d15/0x3f20 [jbd2]
        (inlined by) jbd2_journal_commit_transaction at fs/jbd2/commit.c:1034
        kjournald2+0x13b/0x450 [jbd2]
        kthread+0x1cd/0x1f0
        ret_from_fork+0x27/0x50
      
       read to 0xffff99f9b1bd0e30 of 8 bytes by task 25724 on cpu 68:
        jbd2_write_access_granted+0x1b2/0x250 [jbd2]
        jbd2_write_access_granted at fs/jbd2/transaction.c:1155
        jbd2_journal_get_write_access+0x2c/0x60 [jbd2]
        __ext4_journal_get_write_access+0x50/0x90 [ext4]
        ext4_mb_mark_diskspace_used+0x158/0x620 [ext4]
        ext4_mb_new_blocks+0x54f/0xca0 [ext4]
        ext4_ind_map_blocks+0xc79/0x1b40 [ext4]
        ext4_map_blocks+0x3b4/0x950 [ext4]
        _ext4_get_block+0xfc/0x270 [ext4]
        ext4_get_block+0x3b/0x50 [ext4]
        __block_write_begin_int+0x22e/0xae0
        __block_write_begin+0x39/0x50
        ext4_write_begin+0x388/0xb50 [ext4]
        generic_perform_write+0x15d/0x290
        ext4_buffered_write_iter+0x11f/0x210 [ext4]
        ext4_file_write_iter+0xce/0x9e0 [ext4]
        new_sync_write+0x29c/0x3b0
        __vfs_write+0x92/0xa0
        vfs_write+0x103/0x260
        ksys_write+0x9d/0x130
        __x64_sys_write+0x4c/0x60
        do_syscall_64+0x91/0xb05
        entry_SYSCALL_64_after_hwframe+0x49/0xbe
      
       5 locks held by fsync04/25724:
        #0: ffff99f9911093f8 (sb_writers#13){.+.+}, at: vfs_write+0x21c/0x260
        #1: ffff99f9db4c0348 (&sb->s_type->i_mutex_key#15){+.+.}, at: ext4_buffered_write_iter+0x65/0x210 [ext4]
        #2: ffff99f5e7dfcf58 (jbd2_handle){++++}, at: start_this_handle+0x1c1/0x9d0 [jbd2]
        #3: ffff99f9db4c0168 (&ei->i_data_sem){++++}, at: ext4_map_blocks+0x176/0x950 [ext4]
        #4: ffffffff99086b40 (rcu_read_lock){....}, at: jbd2_write_access_granted+0x4e/0x250 [jbd2]
       irq event stamp: 1407125
       hardirqs last  enabled at (1407125): [<ffffffff980da9b7>] __find_get_block+0x107/0x790
       hardirqs last disabled at (1407124): [<ffffffff980da8f9>] __find_get_block+0x49/0x790
       softirqs last  enabled at (1405528): [<ffffffff98a0034c>] __do_softirq+0x34c/0x57c
       softirqs last disabled at (1405521): [<ffffffff97cc67a2>] irq_exit+0xa2/0xc0
      
       Reported by Kernel Concurrency Sanitizer on:
       CPU: 68 PID: 25724 Comm: fsync04 Tainted: G L 5.6.0-rc2-next-20200221+ #7
       Hardware name: HPE ProLiant DL385 Gen10/ProLiant DL385 Gen10, BIOS A40 07/10/2019
      
      The plain reads are outside of jh->b_state_lock critical section which result
      in data races. Fix them by adding pairs of READ|WRITE_ONCE().
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Signed-off-by: default avatarQian Cai <cai@lca.pw>
      Link: https://lore.kernel.org/r/20200222043111.2227-1-cai@lca.pwSigned-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      6c5d9112
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 7557c1b3
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "Four small fixes.
      
        Three are in drivers for fairly obvious bugs. The fourth is a set of
        regressions introduced by the compat_ioctl changes because some of the
        compat updates wrongly replaced .ioctl instead of .compat_ioctl"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: compat_ioctl: cdrom: Replace .ioctl with .compat_ioctl in four appropriate places
        scsi: zfcp: fix wrong data and display format of SFP+ temperature
        scsi: sd_sbc: Fix sd_zbc_report_zones()
        scsi: libfc: free response frame from GPN_ID
      7557c1b3
  7. 28 Feb, 2020 11 commits
    • Linus Torvalds's avatar
      Merge tag 'pci-v5.6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci · 29795de0
      Linus Torvalds authored
      Pull PCI fixes from Bjorn Helgaas:
      
       - Fix build issue on 32-bit ARM with old compilers (Marek Szyprowski)
      
       - Update MAINTAINERS for recent Cadence driver file move (Lukas
         Bulwahn)
      
      * tag 'pci-v5.6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
        MAINTAINERS: Correct Cadence PCI driver path
        PCI: brcmstb: Fix build on 32bit ARM platforms with older compilers
      29795de0
    • Linus Torvalds's avatar
      Merge tag 'block-5.6-2020-02-28' of git://git.kernel.dk/linux-block · 2edc78b9
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
      
       - Passthrough insertion fix (Ming)
      
       - Kill off some unused arguments (John)
      
       - blktrace RCU fix (Jan)
      
       - Dead fields removal for null_blk (Dongli)
      
       - NVMe polled IO fix (Bijan)
      
      * tag 'block-5.6-2020-02-28' of git://git.kernel.dk/linux-block:
        nvme-pci: Hold cq_poll_lock while completing CQEs
        blk-mq: Remove some unused function arguments
        null_blk: remove unused fields in 'nullb_cmd'
        blktrace: Protect q->blk_trace with RCU
        blk-mq: insert passthrough request into hctx->dispatch directly
      2edc78b9
    • Linus Torvalds's avatar
      Merge tag 'io_uring-5.6-2020-02-28' of git://git.kernel.dk/linux-block · 74dea5d9
      Linus Torvalds authored
      Pull io_uring fixes from Jens Axboe:
      
       - Fix for a race with IOPOLL used with SQPOLL (Xiaoguang)
      
       - Only show ->fdinfo if procfs is enabled (Tobias)
      
       - Fix for a chain with multiple personalities in the SQEs
      
       - Fix for a missing free of personality idr on exit
      
       - Removal of the spin-for-work optimization
      
       - Fix for next work lookup on request completion
      
       - Fix for non-vec read/write result progation in case of links
      
       - Fix for a fileset references on switch
      
       - Fix for a recvmsg/sendmsg 32-bit compatability mode
      
      * tag 'io_uring-5.6-2020-02-28' of git://git.kernel.dk/linux-block:
        io_uring: fix 32-bit compatability with sendmsg/recvmsg
        io_uring: define and set show_fdinfo only if procfs is enabled
        io_uring: drop file set ref put/get on switch
        io_uring: import_single_range() returns 0/-ERROR
        io_uring: pick up link work on submit reference drop
        io-wq: ensure work->task_pid is cleared on init
        io-wq: remove spin-for-work optimization
        io_uring: fix poll_list race for SETUP_IOPOLL|SETUP_SQPOLL
        io_uring: fix personality idr leak
        io_uring: handle multiple personalities in link chains
      74dea5d9
    • Jens Axboe's avatar
      Merge branch 'nvme-5.6-rc4' of git://git.infradead.org/nvme into block-5.6 · 5b8ea58b
      Jens Axboe authored
      Pull NVMe fix from Keith.
      
      * 'nvme-5.6-rc4' of git://git.infradead.org/nvme:
        nvme-pci: Hold cq_poll_lock while completing CQEs
      5b8ea58b
    • Linus Torvalds's avatar
      Merge tag 'acpi-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · c60c0402
      Linus Torvalds authored
      Pull ACPI fixes from Rafael Wysocki:
       "Fix a couple of configuration issues in the ACPI watchdog (WDAT)
        driver (Mika Westerberg) and make it possible to disable that driver
        at boot time in case it still does not work as expected (Jean
        Delvare)"
      
      * tag 'acpi-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        ACPI: watchdog: Set default timeout in probe
        ACPI: watchdog: Fix gas->access_width usage
        ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro
        ACPI: watchdog: Allow disabling WDAT at boot
      c60c0402
    • Linus Torvalds's avatar
      Merge tag 'pm-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 36428598
      Linus Torvalds authored
      Pull power management fixes from Rafael Wysocki:
       "Fix a recent cpufreq initialization regression (Rafael Wysocki),
        revert a devfreq commit that made incompatible changes and broke user
        land on some systems (Orson Zhai), drop a stale reference to a
        document that has gone away recently (Jonathan Neuschäfer), and fix a
        typo in a hibernation code comment (Alexandre Belloni)"
      
      * tag 'pm-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        cpufreq: Fix policy initialization for internal governor drivers
        Revert "PM / devfreq: Modify the device name as devfreq(X) for sysfs"
        PM / hibernate: fix typo "reserverd_size" -> "reserved_size"
        Documentation: power: Drop reference to interface.rst
      36428598
    • Linus Torvalds's avatar
      Merge tag 'zonefs-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs · bfeb4f99
      Linus Torvalds authored
      Pull zonefs fixes from Damien Le Moal:
       "Two fixes in here:
      
         - Revert the initial decision to silently ignore IOCB_NOWAIT for
           asynchronous direct IOs to sequential zone files. Instead, return
           an error to the user to signal that the feature is not supported
           (from Christoph)
      
         - A fix to zonefs Kconfig to select FS_IOMAP to avoid build failures
           if no other file system already selected this option (from
           Johannes)"
      
      * tag 'zonefs-5.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
        zonefs: select FS_IOMAP
        zonefs: fix IOCB_NOWAIT handling
      bfeb4f99
    • Paolo Bonzini's avatar
      Merge tag 'kvmarm-fixes-5.6-1' of... · e951445f
      Paolo Bonzini authored
      Merge tag 'kvmarm-fixes-5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
      
      KVM/arm fixes for 5.6, take #1
      
      - Fix compilation on 32bit
      - Move  VHE guest entry/exit into the VHE-specific entry code
      - Make sure all functions called by the non-VHE HYP code is tagged as __always_inline
      e951445f
    • Erwan Velu's avatar
      kvm: x86: Limit the number of "kvm: disabled by bios" messages · ef935c25
      Erwan Velu authored
      In older version of systemd(219), at boot time, udevadm is called with :
      	/usr/bin/udevadm trigger --type=devices --action=add"
      
      This program generates an echo "add" in /sys/devices/system/cpu/cpu<x>/uevent,
      leading to the "kvm: disabled by bios" message in case of your Bios disabled
      the virtualization extensions.
      
      On a modern system running up to 256 CPU threads, this pollutes the Kernel logs.
      
      This patch offers to ratelimit this message to avoid any userspace program triggering
      this uevent printing this message too often.
      
      This patch is only a workaround but greatly reduce the pollution without
      breaking the current behavior of printing a message if some try to instantiate
      KVM on a system that doesn't support it.
      
      Note that recent versions of systemd (>239) do not have trigger this behavior.
      
      This patch will be useful at least for some using older systemd with recent Kernels.
      Signed-off-by: default avatarErwan Velu <e.velu@criteo.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      ef935c25
    • Rafael J. Wysocki's avatar
      Merge branches 'pm-sleep' and 'pm-devfreq' · 189c6967
      Rafael J. Wysocki authored
      * pm-sleep:
        PM / hibernate: fix typo "reserverd_size" -> "reserved_size"
        Documentation: power: Drop reference to interface.rst
      
      * pm-devfreq:
        Revert "PM / devfreq: Modify the device name as devfreq(X) for sysfs"
      189c6967
    • Paolo Bonzini's avatar
      KVM: x86: avoid useless copy of cpufreq policy · aaec7c03
      Paolo Bonzini authored
      struct cpufreq_policy is quite big and it is not a good idea
      to allocate one on the stack.  Just use cpufreq_cpu_get and
      cpufreq_cpu_put which is even simpler.
      Reported-by: default avatarChristoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      aaec7c03