1. 30 May, 2017 22 commits
  2. 29 May, 2017 1 commit
  3. 28 May, 2017 1 commit
  4. 27 May, 2017 14 commits
    • Linus Torvalds's avatar
      Merge tag 'tty-4.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 249f1efd
      Linus Torvalds authored
      Pull tty/serial fixes from Greg KH:
       "Here are some serial and tty fixes for 4.12-rc3. They are a bit bigger
        than normal, which is why I had them bake in linux-next for a few
        weeks and didn't send them to you for -rc2.
      
        They revert a few of the serdev patches from 4.12-rc1, and bring
        things back to how they were in 4.11, to try to make things a bit more
        stable there. Rob and Johan both agree that this is the way forward,
        so this isn't people squabbling over semantics. Other than that, just
        a few minor serial driver fixes that people have had problems with.
      
        All of these have been in linux-next for a few weeks with no reported
        issues"
      
      * tag 'tty-4.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        serial: altera_uart: call iounmap() at driver remove
        serial: imx: ensure UCR3 and UFCR are setup correctly
        MAINTAINERS/serial: Change maintainer of jsm driver
        serial: enable serdev support
        tty/serdev: add serdev registration interface
        serdev: Restore serdev_device_write_buf for atomic context
        serial: core: fix crash in uart_suspend_port
        tty: fix port buffer locking
        tty: ehv_bytechan: clean up init error handling
        serial: ifx6x60: fix use-after-free on module unload
        serial: altera_jtaguart: adding iounmap()
        serial: exar: Fix stuck MSIs
        serial: efm32: Fix parity management in 'efm32_uart_console_get_options()'
        serdev: fix tty-port client deregistration
        Revert "tty_port: register tty ports with serdev bus"
        drivers/tty: 8250: only call fintek_8250_probe when doing port I/O
      249f1efd
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 6f68a6ae
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "Fix running SPU programs on Cell, and a few other minor fixes.
      
        Thanks to Alistair Popple, Jeremy Kerr, Michael Neuling, Nicholas
        Piggin"
      
      * tag 'powerpc-4.12-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc: Add PPC_FEATURE userspace bits for SCV and DARN instructions
        powerpc/spufs: Fix hash faults for kernel regions
        powerpc: Fix booting P9 hash with CONFIG_PPC_RADIX_MMU=N
        powerpc/powernv/npu-dma.c: Fix opal_npu_destroy_context() call
        selftests/powerpc: Fix TM resched DSCR test with some compilers
      6f68a6ae
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 38e6bf23
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A series of fixes for X86:
      
         - The final fix for the end-of-stack issue in the unwinder
         - Handle non PAT systems gracefully
         - Prevent access to uninitiliazed memory
         - Move early delay calaibration after basic init
         - Fix Kconfig help text
         - Fix a cross compile issue
         - Unbreak older make versions"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/timers: Move simple_udelay_calibration past init_hypervisor_platform
        x86/alternatives: Prevent uninitialized stack byte read in apply_alternatives()
        x86/PAT: Fix Xorg regression on CPUs that don't support PAT
        x86/watchdog: Fix Kconfig help text file path reference to lockup watchdog documentation
        x86/build: Permit building with old make versions
        x86/unwind: Add end-of-stack check for ftrace handlers
        Revert "x86/entry: Fix the end of the stack for newly forked tasks"
        x86/boot: Use CROSS_COMPILE prefix for readelf
      38e6bf23
    • Linus Torvalds's avatar
      Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 39b8ab31
      Linus Torvalds authored
      Pull timer fixlet from Thomas Gleixner:
       "Silence dmesg spam by making the posix cpu timer printks depend on
        print_fatal_signals"
      
      * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        posix-timers: Make signal printks conditional
      39b8ab31
    • Linus Torvalds's avatar
      Merge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · de0b9d75
      Linus Torvalds authored
      Pull RAS fixes from Thomas Gleixner:
       "Two fixlets for RAS:
      
         - Export memory_error() so the NFIT module can utilize it
      
         - Handle memory errors in NFIT correctly"
      
      * 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        acpi, nfit: Fix the memory error check in nfit_handle_mce()
        x86/MCE: Export memory_error()
      de0b9d75
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · fac3fcae
      Linus Torvalds authored
      Pull perf tooling fixes from Thomas Gleixner:
      
       - Synchronization of tools and kernel headers
      
       - A series of fixes for perf report addressing various failures:
          * Handle invalid maps proper
          * Plug a memory leak
          * Handle frames and callchain order correctly
      
       - Fixes for handling inlines and children mode
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        tools/include: Sync kernel ABI headers with tooling headers
        perf tools: Put caller above callee in --children mode
        perf report: Do not drop last inlined frame
        perf report: Always honor callchain order for inlined nodes
        perf script: Add --inline option for debugging
        perf report: Fix off-by-one for non-activation frames
        perf report: Fix memory leak in addr2line when called by addr2inlines
        perf report: Don't crash on invalid maps in `-g srcline` mode
      fac3fcae
    • Linus Torvalds's avatar
      Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 805f2869
      Linus Torvalds authored
      Pull locking fix from Thomas Gleixner:
       "A fix for a state leak which was introduced in the recent rework of
        futex/rtmutex interaction"
      
      * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        futex,rt_mutex: Fix rt_mutex_cleanup_proxy_lock()
      805f2869
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d024baa5
      Linus Torvalds authored
      Pull kthread fix from Thomas Gleixner:
       "A single fix which prevents a use after free when kthread fork fails"
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        kthread: Fix use-after-free if kthread fork fails
      d024baa5
    • Linus Torvalds's avatar
      Merge tag 'trace-v4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 77d64656
      Linus Torvalds authored
      Pull ftrace fixes from Steven Rostedt:
       "There's been a few memory issues found with ftrace.
      
        One was simply a memory leak where not all was being freed that should
        have been in releasing a file pointer on set_graph_function.
      
        Then Thomas found that the ftrace trampolines were marked for
        read/write as well as execute. To shrink the possible attack surface,
        he added calls to set them to ro. Which also uncovered some other
        issues with freeing module allocated memory that had its permissions
        changed.
      
        Kprobes had a similar issue which is fixed and a selftest was added to
        trigger that issue again"
      
      * tag 'trace-v4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        x86/ftrace: Make sure that ftrace trampolines are not RWX
        x86/mm/ftrace: Do not bug in early boot on irqs_disabled in cpu_flush_range()
        selftests/ftrace: Add a testcase for many kprobe events
        kprobes/x86: Fix to set RWX bits correctly before releasing trampoline
        ftrace: Fix memory leak in ftrace_graph_release()
      77d64656
    • Thomas Gleixner's avatar
      x86/ftrace: Make sure that ftrace trampolines are not RWX · 6ee98ffe
      Thomas Gleixner authored
      ftrace use module_alloc() to allocate trampoline pages. The mapping of
      module_alloc() is RWX, which makes sense as the memory is written to right
      after allocation. But nothing makes these pages RO after writing to them.
      
      Add proper set_memory_rw/ro() calls to protect the trampolines after
      modification.
      
      Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1705251056410.1862@nanosSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
      6ee98ffe
    • Steven Rostedt (VMware)'s avatar
      x86/mm/ftrace: Do not bug in early boot on irqs_disabled in cpu_flush_range() · a53276e2
      Steven Rostedt (VMware) authored
      With function tracing starting in early bootup and having its trampoline
      pages being read only, a bug triggered with the following:
      
      kernel BUG at arch/x86/mm/pageattr.c:189!
      invalid opcode: 0000 [#1] SMP
      Modules linked in:
      CPU: 0 PID: 0 Comm: swapper Not tainted 4.12.0-rc2-test+ #3
      Hardware name: MSI MS-7823/CSM-H87M-G43 (MS-7823), BIOS V1.6 02/22/2014
      task: ffffffffb4222500 task.stack: ffffffffb4200000
      RIP: 0010:change_page_attr_set_clr+0x269/0x302
      RSP: 0000:ffffffffb4203c88 EFLAGS: 00010046
      RAX: 0000000000000046 RBX: 0000000000000000 RCX: 00000001b6000000
      RDX: ffffffffb4203d40 RSI: 0000000000000000 RDI: ffffffffb4240d60
      RBP: ffffffffb4203d18 R08: 00000001b6000000 R09: 0000000000000001
      R10: ffffffffb4203aa8 R11: 0000000000000003 R12: ffffffffc029b000
      R13: ffffffffb4203d40 R14: 0000000000000001 R15: 0000000000000000
      FS:  0000000000000000(0000) GS:ffff9a639ea00000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: ffff9a636b384000 CR3: 00000001ea21d000 CR4: 00000000000406b0
      Call Trace:
       change_page_attr_clear+0x1f/0x21
       set_memory_ro+0x1e/0x20
       arch_ftrace_update_trampoline+0x207/0x21c
       ? ftrace_caller+0x64/0x64
       ? 0xffffffffc029b000
       ftrace_startup+0xf4/0x198
       register_ftrace_function+0x26/0x3c
       function_trace_init+0x5e/0x73
       tracer_init+0x1e/0x23
       tracing_set_tracer+0x127/0x15a
       register_tracer+0x19b/0x1bc
       init_function_trace+0x90/0x92
       early_trace_init+0x236/0x2b3
       start_kernel+0x200/0x3f5
       x86_64_start_reservations+0x29/0x2b
       x86_64_start_kernel+0x17c/0x18f
       secondary_startup_64+0x9f/0x9f
       ? secondary_startup_64+0x9f/0x9f
      
      Interrupts should not be enabled at this early in the boot process. It is
      also fine to leave interrupts enabled during this time as there's only one
      CPU running, and on_each_cpu() means to only run on the current CPU.
      
      If early_boot_irqs_disabled is set, it is safe to run cpu_flush_range() with
      interrupts disabled. Don't trigger a BUG_ON() in that case.
      
      Link: http://lkml.kernel.org/r/20170526093717.0be3b849@gandalf.local.homeSuggested-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
      a53276e2
    • Masami Hiramatsu's avatar
      selftests/ftrace: Add a testcase for many kprobe events · bdd7e3d6
      Masami Hiramatsu authored
      Add a testcase to test kprobes via ftrace interface
      with many concurrent kprobe events.
      
      This tries to add many kprobe events (up to 256) on
      kernel functions. To avoid making ftrace-based
      kprobes (kprobes on fentry), it skips first N bytes
      (on x86 N=5, on ppc or arm N=4) of function entry.
      After that, it enables all those events, disable it,
      and remove it.
      
      Since the unoptimization buffer reclaiming will
      be delayed, after removing events, it will wait
      enough time.
      
      Link: http://lkml.kernel.org/r/149577388470.11702.11832460851769204511.stgit@devboxSigned-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
      Suggested-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
      bdd7e3d6
    • Masami Hiramatsu's avatar
      kprobes/x86: Fix to set RWX bits correctly before releasing trampoline · c93f5cf5
      Masami Hiramatsu authored
      Fix kprobes to set(recover) RWX bits correctly on trampoline
      buffer before releasing it. Releasing readonly page to
      module_memfree() crash the kernel.
      
      Without this fix, if kprobes user register a bunch of kprobes
      in function body (since kprobes on function entry usually
      use ftrace) and unregister it, kernel hits a BUG and crash.
      
      Link: http://lkml.kernel.org/r/149570868652.3518.14120169373590420503.stgit@devboxSigned-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
      Fixes: d0381c81 ("kprobes/x86: Set kprobes pages read-only")
      Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
      c93f5cf5
    • Luis Henriques's avatar
      ftrace: Fix memory leak in ftrace_graph_release() · f9797c2f
      Luis Henriques authored
      ftrace_hash is being kfree'ed in ftrace_graph_release(), however the
      ->buckets field is not.  This results in a memory leak that is easily
      captured by kmemleak:
      
      unreferenced object 0xffff880038afe000 (size 8192):
        comm "trace-cmd", pid 238, jiffies 4294916898 (age 9.736s)
        hex dump (first 32 bytes):
          00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
          00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
        backtrace:
          [<ffffffff815f561e>] kmemleak_alloc+0x4e/0xb0
          [<ffffffff8113964d>] __kmalloc+0x12d/0x1a0
          [<ffffffff810bf6d1>] alloc_ftrace_hash+0x51/0x80
          [<ffffffff810c0523>] __ftrace_graph_open.isra.39.constprop.46+0xa3/0x100
          [<ffffffff810c05e8>] ftrace_graph_open+0x68/0xa0
          [<ffffffff8114003d>] do_dentry_open.isra.1+0x1bd/0x2d0
          [<ffffffff81140df7>] vfs_open+0x47/0x60
          [<ffffffff81150f95>] path_openat+0x2a5/0x1020
          [<ffffffff81152d6a>] do_filp_open+0x8a/0xf0
          [<ffffffff811411df>] do_sys_open+0x12f/0x200
          [<ffffffff811412ce>] SyS_open+0x1e/0x20
          [<ffffffff815fa6e0>] entry_SYSCALL_64_fastpath+0x13/0x94
          [<ffffffffffffffff>] 0xffffffffffffffff
      
      Link: http://lkml.kernel.org/r/20170525152038.7661-1-lhenriques@suse.com
      
      Cc: stable@vger.kernel.org
      Fixes: b9b0c831 ("ftrace: Convert graph filter to use hash tables")
      Signed-off-by: default avatarLuis Henriques <lhenriques@suse.com>
      Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
      f9797c2f
  5. 26 May, 2017 2 commits