1. 01 Oct, 2016 5 commits
    • Miklos Szeredi's avatar
      fuse: handle killpriv in userspace fs · 5e940c1d
      Miklos Szeredi authored
      
      
      Only userspace filesystem can do the killing of suid/sgid without races.
      So introduce an INIT flag and negotiate support for this.
      Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
      5e940c1d
    • Miklos Szeredi's avatar
      fuse: fix killing s[ug]id in setattr · a09f99ed
      Miklos Szeredi authored
      
      
      Fuse allowed VFS to set mode in setattr in order to clear suid/sgid on
      chown and truncate, and (since writeback_cache) write.  The problem with
      this is that it'll potentially restore a stale mode.
      
      The poper fix would be to let the filesystems do the suid/sgid clearing on
      the relevant operations.  Possibly some are already doing it but there's no
      way we can detect this.
      
      So fix this by refreshing and recalculating the mode.  Do this only if
      ATTR_KILL_S[UG]ID is set to not destroy performance for writes.  This is
      still racy but the size of the window is reduced.
      Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
      Cc: <stable@vger.kernel.org>
      a09f99ed
    • Miklos Szeredi's avatar
      fuse: invalidate dir dentry after chmod · 5e2b8828
      Miklos Szeredi authored
      
      
      Without "default_permissions" the userspace filesystem's lookup operation
      needs to perform the check for search permission on the directory.
      
      If directory does not allow search for everyone (this is quite rare) then
      userspace filesystem has to set entry timeout to zero to make sure
      permissions are always performed.
      
      Changing the mode bits of the directory should also invalidate the
      (previously cached) dentry to make sure the next lookup will have a chance
      of updating the timeout, if needed.
      Reported-by: default avatarJean-Pierre André <jean-pierre.andre@wanadoo.fr>
      Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
      Cc: <stable@vger.kernel.org>
      5e2b8828
    • Seth Forshee's avatar
      fuse: Use generic xattr ops · 703c7362
      Seth Forshee authored
      
      
      In preparation for posix acl support, rework fuse to use xattr handlers and
      the generic setxattr/getxattr/listxattr callbacks.  Split the xattr code
      out into it's own file, and promote symbols to module-global scope as
      needed.
      
      Functionally these changes have no impact, as fuse still uses a single
      handler for all xattrs which uses the old callbacks.
      Signed-off-by: default avatarSeth Forshee <seth.forshee@canonical.com>
      Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
      703c7362
    • Miklos Szeredi's avatar
      fuse: listxattr: verify xattr list · cb3ae6d2
      Miklos Szeredi authored
      
      
      Make sure userspace filesystem is returning a well formed list of xattr
      names (zero or more nonzero length, null terminated strings).
      
      [Michael Theall: only verify in the nonzero size case]
      Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
      Cc: <stable@vger.kernel.org>
      cb3ae6d2
  2. 26 Sep, 2016 3 commits
  3. 25 Sep, 2016 7 commits
    • Lorenzo Stoakes's avatar
      mm: check VMA flags to avoid invalid PROT_NONE NUMA balancing · 38e08854
      Lorenzo Stoakes authored
      The NUMA balancing logic uses an arch-specific PROT_NONE page table flag
      defined by pte_protnone() or pmd_protnone() to mark PTEs or huge page
      PMDs respectively as requiring balancing upon a subsequent page fault.
      User-defined PROT_NONE memory regions which also have this flag set will
      not normally invoke the NUMA balancing code as do_page_fault() will send
      a segfault to the process before handle_mm_fault() is even called.
      
      However if access_remote_vm() is invoked to access a PROT_NONE region of
      memory, handle_mm_fault() is called via faultin_page() and
      __get_user_pages() without any access checks being performed, meaning
      the NUMA balancing logic is incorrectly invoked on a non-NUMA memory
      region.
      
      A simple means of triggering this problem is to access PROT_NONE mmap'd
      memory using /proc/self/mem which reliably results in the NUMA handling
      functions being invoked when CONFIG_NUMA_BALANCING is set.
      
      This issue was reported in bugzilla (issue 99101) which includes some
      simple repro code.
      
      There are BUG_ON() checks in do_numa_page() and do_huge_pmd_numa_page()
      added at commit c0e7cad9 to avoid accidentally provoking strange
      behaviour by attempting to apply NUMA balancing to pages that are in
      fact PROT_NONE.  The BUG_ON()'s are consistently triggered by the repro.
      
      This patch moves the PROT_NONE check into mm/memory.c rather than
      invoking BUG_ON() as faulting in these pages via faultin_page() is a
      valid reason for reaching the NUMA check with the PROT_NONE page table
      flag set and is therefore not always a bug.
      
      Link: https://bugzilla.kernel.org/show_bug.cgi?id=99101
      
      Reported-by: default avatarTrevor Saunders <tbsaunde@tbsaunde.org>
      Signed-off-by: default avatarLorenzo Stoakes <lstoakes@gmail.com>
      Acked-by: default avatarRik van Riel <riel@redhat.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Mel Gorman <mgorman@techsingularity.net>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      38e08854
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · 831e45d8
      Linus Torvalds authored
      Pull MIPS fixes from Ralf Baechle:
       "A round of 4.8 fixes:
      
        MIPS generic code:
         - Add a missing ".set pop" in an early commit
         - Fix memory regions reaching top of physical
         - MAAR: Fix address alignment
         - vDSO: Fix Malta EVA mapping to vDSO page structs
         - uprobes: fix incorrect uprobe brk handling
         - uprobes: select HAVE_REGS_AND_STACK_ACCESS_API
         - Avoid a BUG warning during PR_SET_FP_MODE prctl
         - SMP: Fix possibility of deadlock when bringing CPUs online
         - R6: Remove compact branch policy Kconfig entries
         - Fix size calc when avoiding IPIs for small icache flushes
         - Fix pre-r6 emulation FPU initialisation
         - Fix delay slot emulation count in debugfs
      
        ATH79:
         - Fix test for error return of clk_register_fixed_factor.
      
        Octeon:
         - Fix kernel header to work for VDSO build.
         - Fix initialization of platform device probing.
      
        paravirt:
         - Fix undefined reference to smp_bootstrap"
      
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
        MIPS: Fix delay slot emulation count in debugfs
        MIPS: SMP: Fix possibility of deadlock when bringing CPUs online
        MIPS: Fix pre-r6 emulation FPU initialisation
        MIPS: vDSO: Fix Malta EVA mapping to vDSO page structs
        MIPS: Select HAVE_REGS_AND_STACK_ACCESS_API
        MIPS: Octeon: Fix platform bus probing
        MIPS: Octeon: mangle-port: fix build failure with VDSO code
        MIPS: Avoid a BUG warning during prctl(PR_SET_FP_MODE, ...)
        MIPS: c-r4k: Fix size calc when avoiding IPIs for small icache flushes
        MIPS: Add a missing ".set pop" in an early commit
        MIPS: paravirt: Fix undefined reference to smp_bootstrap
        MIPS: Remove compact branch policy Kconfig entries
        MIPS: MAAR: Fix address alignment
        MIPS: Fix memory regions reaching top of physical
        MIPS: uprobes: fix incorrect uprobe brk handling
        MIPS: ath79: Fix test for error return of clk_register_fixed_factor().
      831e45d8
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.8-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 751b9a5d
      Linus Torvalds authored
      Pull one more powerpc fix from Michael Ellerman:
       "powernv/pci: Fix m64 checks for SR-IOV and window alignment from
        Russell Currey"
      
      * tag 'powerpc-4.8-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/powernv/pci: Fix m64 checks for SR-IOV and window alignment
      751b9a5d
    • Linus Torvalds's avatar
      radix tree: fix sibling entry handling in radix_tree_descend() · 8d2c0d36
      Linus Torvalds authored
      The fixes to the radix tree test suite show that the multi-order case is
      broken.  The basic reason is that the radix tree code uses tagged
      pointers with the "internal" bit in the low bits, and calculating the
      pointer indices was supposed to mask off those bits.  But gcc will
      notice that we then use the index to re-create the pointer, and will
      avoid doing the arithmetic and use the tagged pointer directly.
      
      This cleans the code up, using the existing is_sibling_entry() helper to
      validate the sibling pointer range (instead of open-coding it), and
      using entry_to_node() to mask off the low tag bit from the pointer.  And
      once you do that, you might as well just use the now cleaned-up pointer
      directly.
      
      [ Side note: the multi-order code isn't actually ever used in the kernel
        right now, and the only reason I didn't just delete all that code is
        that Kirill Shutemov piped up and said:
      
          "Well, my ext4-with-huge-pages patchset[1] uses multi-order entries.
           It also converts shmem-with-huge-pages and hugetlb to them.
      
           I'm okay with converting it to other mechanism, but I need
           something.  (I looked into Konstantin's RFC patchset[2].  It looks
           okay, but I don't feel myself qualified to review it as I don't
           know much about radix-tree internals.)"
      
        [1] http://lkml.kernel.org/r/20160915115523.29737-1-kirill.shutemov@linux.intel.com
        [2] http://lkml.kernel.org/r/147230727479.9957.1087787722571077339.stgit@zurg
      
       ]
      Reported-by: default avatarMatthew Wilcox <mawilcox@microsoft.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Cc: Konstantin Khlebnikov <koct9i@gmail.com>
      Cc: Cedric Blancher <cedric.blancher@gmail.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8d2c0d36
    • Matthew Wilcox's avatar
      radix tree test suite: Test radix_tree_replace_slot() for multiorder entries · 62fd5258
      Matthew Wilcox authored
      
      
      When we replace a multiorder entry, check that all indices reflect the
      new value.
      
      Also, compile the test suite with -O2, which shows other problems with
      the code due to some dodgy pointer operations in the radix tree code.
      Signed-off-by: default avatarMatthew Wilcox <mawilcox@microsoft.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      62fd5258
    • Al Viro's avatar
      fix memory leaks in tracing_buffers_splice_read() · 1ae2293d
      Al Viro authored
      
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      1ae2293d
    • Steven Rostedt (Red Hat)'s avatar
      tracing: Move mutex to protect against resetting of seq data · 1245800c
      Steven Rostedt (Red Hat) authored
      The iter->seq can be reset outside the protection of the mutex. So can
      reading of user data. Move the mutex up to the beginning of the function.
      
      Fixes: d7350c3f
      
       ("tracing/core: make the read callbacks reentrants")
      Cc: stable@vger.kernel.org # 2.6.30+
      Reported-by: default avatarAl Viro <viro@ZenIV.linux.org.uk>
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      1245800c
  4. 24 Sep, 2016 10 commits
  5. 23 Sep, 2016 15 commits
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · bd5dbcb4
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
       "Three driver bugfixes: fixing uninitialized memory pointers (eg20t),
        pm/clock imbalance (qup), and a wrongly set cached variable (pc954x)"
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: qup: skip qup_i2c_suspend if the device is already runtime suspended
        i2c: mux: pca954x: retry updating the mux selection on failure
        i2c-eg20t: fix race between i2c init and interrupt enable
      bd5dbcb4
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · d0c1d15f
      Linus Torvalds authored
      Pull input updates from Dmitry Torokhov:
       "Just a fix up for the firmware handling to the Silead driver (which is
        a new driver in this release)"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: silead_gsl1680 - use "silead/" prefix for firmware loading
        Input: silead_gsl1680 - document firmware-name, fix implementation
      d0c1d15f
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.dk/linux-block · 4ee69866
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "Three fixes, two regressions and one that poses a problem in blk-mq
        with the new nvmef code"
      
      * 'for-linus' of git://git.kernel.dk/linux-block:
        blk-mq: skip unmapped queues in blk_mq_alloc_request_hctx
        nvme-rdma: only clear queue flags after successful connect
        blk-throttle: Extend slice if throttle group is not empty
      4ee69866
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · b22734a5
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "Josef fixed a problem when quotas are enabled with his latest ENOSPC
        rework, and Jeff added more checks into the subvol ioctls to avoid
        tripping up lookup_one_len"
      
      * 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        btrfs: ensure that file descriptor used with subvol ioctls is a dir
        Btrfs: handle quota reserve failure properly
      b22734a5
    • Linus Torvalds's avatar
      Merge tag 'regmap-fix-v4.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap · 78bbf153
      Linus Torvalds authored
      Pull regmap fix from Mark Brown:
       "A fix for an issue with double locking that was introduced earlier
        this release.  I'd missed in review that we were already in a locked
        region when trying to drop part of the cache"
      
      * tag 'regmap-fix-v4.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
        regmap: fix deadlock on _regmap_raw_write() error path
      78bbf153
    • Linus Torvalds's avatar
      Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · 2ddfdd42
      Linus Torvalds authored
      Pull crypto fixes from Herbert Xu:
       "This fixes a regression in RSA that was only half-fixed earlier in the
        cycle.  It also fixes an older regression that breaks the keyring
        subsystem"
      
      * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
        crypto: rsa-pkcs1pad - Handle leading zero for decryption
        KEYS: Fix skcipher IV clobbering
      2ddfdd42
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 7d188bad
      Linus Torvalds authored
      Pull arm64 fixes from Catalin Marinas:
       "A couple of last-minute arm64 fixes for 4.8:
      
         - Fix secondary CPU to NUMA node assignment
      
         - Fix kgdb breakpoint insertion in read-only text sections (when
           CONFIG_DEBUG_RODATA or CONFIG_DEBUG_SET_MODULE_RONX are enabled)"
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: kgdb: handle read-only text / modules
        arm64: Call numa_store_cpu_info() earlier.
      7d188bad
    • Linus Torvalds's avatar
      Merge tag 'tags/nand-fixes-for-4.8-rc8' of git://git.infradead.org/linux-ubifs · d9d1ffe0
      Linus Torvalds authored
      Pull MTD fixes from Richard Weinberger:
       "NAND Fixes for 4.8-rc8.
      
        This contains fixes for bugs which got introduced in -rc1.  Usually
        Brian takes NAND patches from Boris, but since Brian is very busy
        these days with other stuff and Boris is not yet member of the
        kernel.org web of trust I stepped in.
      
        Boris will be in Berlin at ELCE, I'll sign his key and hopefully other
        Kernel developers too such that he can issue his own pull requests
        soon.
      
        Summary:
      
         - Fix a wrong OOB layout definition in the mxc driver
         - Fix incorrect ECC handling in the mtk driver"
      
      * tag 'tags/nand-fixes-for-4.8-rc8' of git://git.infradead.org/linux-ubifs:
        mtd: nand: mxc: fix obiwan error in mxc_nand_v[12]_ooblayout_free() functions
        mtd: nand: fix chances to create incomplete ECC data when writing
        mtd: nand: fix generating over-boundary ECC data when writing
      d9d1ffe0
    • Linus Torvalds's avatar
      Merge tag 'mmc-v4.8-rc7' of git://git.linaro.org/people/ulf.hansson/mmc · e7c5412f
      Linus Torvalds authored
      Pull MMC fix from Ulf Hansson:
       "MMC host:
      
         - dw_mmc: fix the spamming log message"
      
      * tag 'mmc-v4.8-rc7' of git://git.linaro.org/people/ulf.hansson/mmc:
        mmc: dw_mmc: fix the spamming log message
      e7c5412f
    • Linus Torvalds's avatar
      Merge tag 'configfs-for-4.8-2' of git://git.infradead.org/users/hch/configfs · e47f2e50
      Linus Torvalds authored
      Pull configfs fix from Christoph Hellwig:
       "One more trivial fix for the binary attribute code from Phil Turnbull"
      
      * tag 'configfs-for-4.8-2' of git://git.infradead.org/users/hch/configfs:
        configfs: Return -EFBIG from configfs_write_bin_file.
      e47f2e50
    • Christoph Hellwig's avatar
      blk-mq: skip unmapped queues in blk_mq_alloc_request_hctx · c8712c6a
      Christoph Hellwig authored
      
      
      This provides the caller a feedback that a given hctx is not mapped and thus
      no command can be sent on it.
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Tested-by: default avatarSteve Wise <swise@opengridcomputing.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      c8712c6a
    • Paul Burton's avatar
      MIPS: Fix pre-r6 emulation FPU initialisation · 7e956304
      Paul Burton authored
      
      
      In the mipsr2_decoder() function, used to emulate pre-MIPSr6
      instructions that were removed in MIPSr6, the init_fpu() function is
      called if a removed pre-MIPSr6 floating point instruction is the first
      floating point instruction used by the task. However, init_fpu()
      performs varous actions that rely upon not being migrated. For example
      in the most basic case it sets the coprocessor 0 Status.CU1 bit to
      enable the FPU & then loads FP register context into the FPU registers.
      If the task were to migrate during this time, it may end up attempting
      to load FP register context on a different CPU where it hasn't set the
      CU1 bit, leading to errors such as:
      
          do_cpu invoked from kernel context![#2]:
          CPU: 2 PID: 7338 Comm: fp-prctl Tainted: G      D         4.7.0-00424-g49b0c82 #2
          task: 838e4000 ti: 88d38000 task.ti: 88d38000
          $ 0   : 00000000 00000001 ffffffff 88d3fef8
          $ 4   : 838e4000 88d38004 00000000 00000001
          $ 8   : 3400fc01 801f8020 808e9100 24000000
          $12   : dbffffff 807b69d8 807b0000 00000000
          $16   : 00000000 80786150 00400fc4 809c0398
          $20   : 809c0338 0040273c 88d3ff28 808e9d30
          $24   : 808e9d30 00400fb4
          $28   : 88d38000 88d3fe88 00000000 8011a2ac
          Hi    : 0040273c
          Lo    : 88d3ff28
          epc   : 80114178 _restore_fp+0x10/0xa0
          ra    : 8011a2ac mipsr2_decoder+0xd5c/0x1660
          Status: 1400fc03	KERNEL EXL IE
          Cause : 1080002c (ExcCode 0b)
          PrId  : 0001a920 (MIPS I6400)
          Modules linked in:
          Process fp-prctl (pid: 7338, threadinfo=88d38000, task=838e4000, tls=766527d0)
          Stack : 00000000 00000000 00000000 88d3fe98 00000000 00000000 809c0398 809c0338
          	  808e9100 00000000 88d3ff28 00400fc4 00400fc4 0040273c 7fb69e18 004a0000
          	  004a0000 004a0000 7664add0 8010de18 00000000 00000000 88d3fef8 88d3ff28
          	  808e9100 00000000 766527d0 8010e534 000c0000 85755000 8181d580 00000000
          	  00000000 00000000 004a0000 00000000 766527d0 7fb69e18 004a0000 80105c20
          	  ...
          Call Trace:
          [<80114178>] _restore_fp+0x10/0xa0
          [<8011a2ac>] mipsr2_decoder+0xd5c/0x1660
          [<8010de18>] do_ri+0x90/0x6b8
          [<80105c20>] ret_from_exception+0x0/0x10
      
      Fix this by disabling preemption around the call to init_fpu(), ensuring
      that it starts & completes on one CPU.
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Fixes: b0a668fb ("MIPS: kernel: mips-r2-to-r6-emul: Add R2 emulator for MIPS R6")
      Cc: linux-mips@linux-mips.org
      Cc: stable@vger.kernel.org # v4.0+
      Patchwork: https://patchwork.linux-mips.org/patch/14305/
      
      Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      7e956304
    • AKASHI Takahiro's avatar
      arm64: kgdb: handle read-only text / modules · 67787b68
      AKASHI Takahiro authored
      Handle read-only cases when CONFIG_DEBUG_RODATA (4.0) or
      CONFIG_DEBUG_SET_MODULE_RONX (3.18) are enabled by using
      aarch64_insn_write() instead of probe_kernel_write() as introduced by
      commit 2f896d58 ("arm64: use fixmap for text patching") in 4.0.
      
      Fixes: 11d91a77
      
       ("arm64: Add CONFIG_DEBUG_SET_MODULE_RONX support")
      Signed-off-by: default avatarAKASHI Takahiro <takahiro.akashi@linaro.org>
      Reviewed-by: default avatarMark Rutland <mark.rutland@arm.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Jason Wessel <jason.wessel@windriver.com>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      67787b68
    • David Daney's avatar
      arm64: Call numa_store_cpu_info() earlier. · c18df0ad
      David Daney authored
      
      
      The wq_numa_init() function makes a private CPU to node map by calling
      cpu_to_node() early in the boot process, before the non-boot CPUs are
      brought online.  Since the default implementation of cpu_to_node()
      returns zero for CPUs that have never been brought online, the
      workqueue system's view is that *all* CPUs are on node zero.
      
      When the unbound workqueue for a non-zero node is created, the
      tsk_cpus_allowed() for the worker threads is the empty set because
      there are, in the view of the workqueue system, no CPUs on non-zero
      nodes.  The code in try_to_wake_up() using this empty cpumask ends up
      using the cpumask empty set value of NR_CPUS as an index into the
      per-CPU area pointer array, and gets garbage as it is one past the end
      of the array.  This results in:
      
      [    0.881970] Unable to handle kernel paging request at virtual address fffffb1008b926a4
      [    1.970095] pgd = fffffc00094b0000
      [    1.973530] [fffffb1008b926a4] *pgd=0000000000000000, *pud=0000000000000000, *pmd=0000000000000000
      [    1.982610] Internal error: Oops: 96000004 [#1] SMP
      [    1.987541] Modules linked in:
      [    1.990631] CPU: 48 PID: 295 Comm: cpuhp/48 Tainted: G        W       4.8.0-rc6-preempt-vol+ #9
      [    1.999435] Hardware name: Cavium ThunderX CN88XX board (DT)
      [    2.005159] task: fffffe0fe89cc300 task.stack: fffffe0fe8b8c000
      [    2.011158] PC is at try_to_wake_up+0x194/0x34c
      [    2.015737] LR is at try_to_wake_up+0x150/0x34c
      [    2.020318] pc : [<fffffc00080e7468>] lr : [<fffffc00080e7424>] pstate: 600000c5
      [    2.027803] sp : fffffe0fe8b8fb10
      [    2.031149] x29: fffffe0fe8b8fb10 x28: 0000000000000000
      [    2.036522] x27: fffffc0008c63bc8 x26: 0000000000001000
      [    2.041896] x25: fffffc0008c63c80 x24: fffffc0008bfb200
      [    2.047270] x23: 00000000000000c0 x22: 0000000000000004
      [    2.052642] x21: fffffe0fe89d25bc x20: 0000000000001000
      [    2.058014] x19: fffffe0fe89d1d00 x18: 0000000000000000
      [    2.063386] x17: 0000000000000000 x16: 0000000000000000
      [    2.068760] x15: 0000000000000018 x14: 0000000000000000
      [    2.074133] x13: 0000000000000000 x12: 0000000000000000
      [    2.079505] x11: 0000000000000000 x10: 0000000000000000
      [    2.084879] x9 : 0000000000000000 x8 : 0000000000000000
      [    2.090251] x7 : 0000000000000040 x6 : 0000000000000000
      [    2.095621] x5 : ffffffffffffffff x4 : 0000000000000000
      [    2.100991] x3 : 0000000000000000 x2 : 0000000000000000
      [    2.106364] x1 : fffffc0008be4c24 x0 : ffffff0ffffada80
      [    2.111737]
      [    2.113236] Process cpuhp/48 (pid: 295, stack limit = 0xfffffe0fe8b8c020)
      [    2.120102] Stack: (0xfffffe0fe8b8fb10 to 0xfffffe0fe8b90000)
      [    2.125914] fb00:                                   fffffe0fe8b8fb80 fffffc00080e7648
      .
      .
      .
      [    2.442859] Call trace:
      [    2.445327] Exception stack(0xfffffe0fe8b8f940 to 0xfffffe0fe8b8fa70)
      [    2.451843] f940: fffffe0fe89d1d00 0000040000000000 fffffe0fe8b8fb10 fffffc00080e7468
      [    2.459767] f960: fffffe0fe8b8f980 fffffc00080e4958 ffffff0ff91ab200 fffffc00080e4b64
      [    2.467690] f980: fffffe0fe8b8f9d0 fffffc00080e515c fffffe0fe8b8fa80 0000000000000000
      [    2.475614] f9a0: fffffe0fe8b8f9d0 fffffc00080e58e4 fffffe0fe8b8fa80 0000000000000000
      [    2.483540] f9c0: fffffe0fe8d10000 0000000000000040 fffffe0fe8b8fa50 fffffc00080e5ac4
      [    2.491465] f9e0: ffffff0ffffada80 fffffc0008be4c24 0000000000000000 0000000000000000
      [    2.499387] fa00: 0000000000000000 ffffffffffffffff 0000000000000000 0000000000000040
      [    2.507309] fa20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
      [    2.515233] fa40: 0000000000000000 0000000000000000 0000000000000000 0000000000000018
      [    2.523156] fa60: 0000000000000000 0000000000000000
      [    2.528089] [<fffffc00080e7468>] try_to_wake_up+0x194/0x34c
      [    2.533723] [<fffffc00080e7648>] wake_up_process+0x28/0x34
      [    2.539275] [<fffffc00080d3764>] create_worker+0x110/0x19c
      [    2.544824] [<fffffc00080d69dc>] alloc_unbound_pwq+0x3cc/0x4b0
      [    2.550724] [<fffffc00080d6bcc>] wq_update_unbound_numa+0x10c/0x1e4
      [    2.557066] [<fffffc00080d7d78>] workqueue_online_cpu+0x220/0x28c
      [    2.563234] [<fffffc00080bd288>] cpuhp_invoke_callback+0x6c/0x168
      [    2.569398] [<fffffc00080bdf74>] cpuhp_up_callbacks+0x44/0xe4
      [    2.575210] [<fffffc00080be194>] cpuhp_thread_fun+0x13c/0x148
      [    2.581027] [<fffffc00080dfbac>] smpboot_thread_fn+0x19c/0x1a8
      [    2.586929] [<fffffc00080dbd64>] kthread+0xdc/0xf0
      [    2.591776] [<fffffc0008083380>] ret_from_fork+0x10/0x50
      [    2.597147] Code: b00057e1 91304021 91005021 b8626822 (b8606821)
      [    2.603464] ---[ end trace 58c0cd36b88802bc ]---
      [    2.608138] Kernel panic - not syncing: Fatal exception
      
      Fix by moving call to numa_store_cpu_info() for all CPUs into
      smp_prepare_cpus(), which happens before wq_numa_init().  Since
      smp_store_cpu_info() now contains only a single function call,
      simplify by removing the function and out-lining its contents.
      Suggested-by: default avatarRobert Richter <rric@kernel.org>
      Fixes: 1a2db300
      
       ("arm64, numa: Add NUMA support for arm64 platforms.")
      Cc: <stable@vger.kernel.org> # 4.7.x-
      Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
      Reviewed-by: default avatarRobert Richter <rrichter@cavium.com>
      Tested-by: default avatarYisheng Xie <xieyisheng1@huawei.com>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      c18df0ad
    • Vivien Didelot's avatar
      locking/hung_task: Fix typo in CONFIG_DETECT_HUNG_TASK help text · 96b03ab8
      Vivien Didelot authored
      
      
      Fix the indefinitiley -> indefinitely typo in Kconfig.debug.
      Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Link: http://lkml.kernel.org/r/20160922205513.17821-1-vivien.didelot@savoirfairelinux.com
      
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      96b03ab8