1. 16 Apr, 2019 2 commits
  2. 14 Apr, 2019 2 commits
  3. 06 Apr, 2019 1 commit
    • Alexander Potapenko's avatar
      x86/asm: Use stricter assembly constraints in bitops · 5b77e95d
      Alexander Potapenko authored
      There's a number of problems with how arch/x86/include/asm/bitops.h
      is currently using assembly constraints for the memory region
      bitops are modifying:
      
      1) Use memory clobber in bitops that touch arbitrary memory
      
      Certain bit operations that read/write bits take a base pointer and an
      arbitrarily large offset to address the bit relative to that base.
      Inline assembly constraints aren't expressive enough to tell the
      compiler that the assembly directive is going to touch a specific memory
      location of unknown size, therefore we have to use the "memory" clobber
      to indicate that the assembly is going to access memory locations other
      than those listed in the inputs/outputs.
      
      To indicate that BTR/BTS instructions don't necessarily touch the first
      sizeof(long) bytes of the argument, we also move the address to assembly
      inputs.
      
      This particular change leads to size increase of 124 kernel functions in
      a defconfig build. For some of them the diff is in NOP operations, other
      end up re-reading values from memory and may potentially slow down the
      execution. But without these clobbers the compiler is free to cache
      the contents of the bitmaps and use them as if they weren't changed by
      the inline assembly.
      
      2) Use byte-sized arguments for operations touching single bytes.
      
      Passing a long value to ANDB/ORB/XORB instructions makes the compiler
      treat sizeof(long) bytes as being clobbered, which isn't the case. This
      may theoretically lead to worse code in the case of heavy optimization.
      
      Practical impact:
      
      I've built a defconfig kernel and looked through some of the functions
      generated by GCC 7.3.0 with and without this clobber, and didn't spot
      any miscompilations.
      
      However there is a (trivial) theoretical case where this code leads to
      miscompilation:
      
        https://lkml.org/lkml/2019/3/28/393
      
      using just GCC 8.3.0 with -O2.  It isn't hard to imagine someone writes
      such a function in the kernel someday.
      
      So the primary motivation is to fix an existing misuse of the asm
      directive, which happens to work in certain configurations now, but
      isn't guaranteed to work under different circumstances.
      
      [ --mingo: Added -stable tag because defconfig only builds a fraction
        of the kernel and the trivial testcase looks normal enough to
        be used in existing or in-development code. ]
      Signed-off-by: default avatarAlexander Potapenko <glider@google.com>
      Cc: <stable@vger.kernel.org>
      Cc: Andy Lutomirski <luto@kernel.org>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Brian Gerst <brgerst@gmail.com>
      Cc: Denys Vlasenko <dvlasenk@redhat.com>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: James Y Knight <jyknight@google.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Paul E. McKenney <paulmck@linux.ibm.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Link: http://lkml.kernel.org/r/20190402112813.193378-1-glider@google.com
      [ Edited the changelog, tidied up one of the defines. ]
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      5b77e95d
  4. 01 Apr, 2019 1 commit
    • Xiaochen Shen's avatar
      x86/resctrl: Fix typos in the mba_sc mount option · faa3604e
      Xiaochen Shen authored
      The user can control the MBA memory bandwidth in MBps (Mega
      Bytes per second) units of the MBA Software Controller (mba_sc)
      by using the "mba_MBps" mount option. For details, see
      Documentation/x86/resctrl_ui.txt.
      
      However, commit
      
        23bf1b6b ("kernfs, sysfs, cgroup, intel_rdt: Support fs_context")
      
      changed the mount option name from "mba_MBps" to "mba_mpbs" by mistake.
      
      Change it back from to "mba_MBps" because it is user-visible, and
      correct "Opt_mba_mpbs" spelling to "Opt_mba_mbps".
      
       [ bp: massage commit message. ]
      
      Fixes: 23bf1b6b ("kernfs, sysfs, cgroup, intel_rdt: Support fs_context")
      Signed-off-by: default avatarXiaochen Shen <xiaochen.shen@intel.com>
      Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
      Cc: dhowells@redhat.com
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: pei.p.jia@intel.com
      Cc: Reinette Chatre <reinette.chatre@intel.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: x86-ml <x86@kernel.org>
      Link: https://lkml.kernel.org/r/1553896238-22130-1-git-send-email-xiaochen.shen@intel.com
      faa3604e
  5. 29 Mar, 2019 1 commit
  6. 28 Mar, 2019 3 commits
    • Jann Horn's avatar
      x86/cpufeature: Fix __percpu annotation in this_cpu_has() · f6027c81
      Jann Horn authored
      &cpu_info.x86_capability is __percpu, and the second argument of
      x86_this_cpu_test_bit() is expected to be __percpu. Don't cast the
      __percpu away and then implicitly add it again. This gets rid of 106
      lines of sparse warnings with the kernel config I'm using.
      Signed-off-by: default avatarJann Horn <jannh@google.com>
      Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
      Cc: Nadav Amit <namit@vmware.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: x86-ml <x86@kernel.org>
      Link: https://lkml.kernel.org/r/20190328154948.152273-1-jannh@google.com
      f6027c81
    • Ralph Campbell's avatar
      x86/mm: Don't exceed the valid physical address space · 92c77f7c
      Ralph Campbell authored
      valid_phys_addr_range() is used to sanity check the physical address range
      of an operation, e.g., access to /dev/mem. It uses __pa(high_memory)
      internally.
      
      If memory is populated at the end of the physical address space, then
      __pa(high_memory) is outside of the physical address space because:
      
         high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
      
      For the comparison in valid_phys_addr_range() this is not an issue, but if
      CONFIG_DEBUG_VIRTUAL is enabled, __pa() maps to __phys_addr(), which
      verifies that the resulting physical address is within the valid physical
      address space of the CPU. So in the case that memory is populated at the
      end of the physical address space, this is not true and triggers a
      VIRTUAL_BUG_ON().
      
      Use __pa(high_memory - 1) to prevent the conversion from going beyond
      the end of valid physical addresses.
      
      Fixes: be62a320 ("x86/mm: Limit mmap() of /dev/mem to valid physical addresses")
      Signed-off-by: default avatarRalph Campbell <rcampbell@nvidia.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: Craig Bergstrom <craigb@google.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
      Cc: Fengguang Wu <fengguang.wu@intel.com>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: Hans Verkuil <hans.verkuil@cisco.com>
      Cc: Mauro Carvalho Chehab <mchehab@s-opensource.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Sander Eikelenboom <linux@eikelenboom.it>
      Cc: Sean Young <sean@mess.org>
      
      Link: https://lkml.kernel.org/r/20190326001817.15413-2-rcampbell@nvidia.com
      92c77f7c
    • Daniel Borkmann's avatar
      x86/retpolines: Disable switch jump tables when retpolines are enabled · a9d57ef1
      Daniel Borkmann authored
      Commit ce02ef06 ("x86, retpolines: Raise limit for generating indirect
      calls from switch-case") raised the limit under retpolines to 20 switch
      cases where gcc would only then start to emit jump tables, and therefore
      effectively disabling the emission of slow indirect calls in this area.
      
      After this has been brought to attention to gcc folks [0], Martin Liska
      has then fixed gcc to align with clang by avoiding to generate switch jump
      tables entirely under retpolines. This is taking effect in gcc starting
      from stable version 8.4.0. Given kernel supports compilation with older
      versions of gcc where the fix is not being available or backported anymore,
      we need to keep the extra KBUILD_CFLAGS around for some time and generally
      set the -fno-jump-tables to align with what more recent gcc is doing
      automatically today.
      
      More than 20 switch cases are not expected to be fast-path critical, but
      it would still be good to align with gcc behavior for versions < 8.4.0 in
      order to have consistency across supported gcc versions. vmlinux size is
      slightly growing by 0.27% for older gcc. This flag is only set to work
      around affected gcc, no change for clang.
      
        [0] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86952Suggested-by: default avatarMartin Liska <mliska@suse.cz>
      Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: David Woodhouse <dwmw2@infradead.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Jesper Dangaard Brouer <brouer@redhat.com>
      Cc: Björn Töpel<bjorn.topel@intel.com>
      Cc: Magnus Karlsson <magnus.karlsson@intel.com>
      Cc: Alexei Starovoitov <ast@kernel.org>
      Cc: H.J. Lu <hjl.tools@gmail.com>
      Cc: Alexei Starovoitov <ast@kernel.org>
      Cc: David S. Miller <davem@davemloft.net>
      Link: https://lkml.kernel.org/r/20190325135620.14882-1-daniel@iogearbox.net
      a9d57ef1
  7. 27 Mar, 2019 2 commits
  8. 24 Mar, 2019 15 commits
    • Peng Hao's avatar
      x86/resctrl: Remove unused variable · 7f2daa96
      Peng Hao authored
      Variable "struct rdt_resource *r" is set but not used. So remove it.
      Signed-off-by: default avatarPeng Hao <peng.hao2@zte.com.cn>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Link: https://lkml.kernel.org/r/1552152584-26087-1-git-send-email-peng.hao2@zte.com.cn
      7f2daa96
    • Linus Torvalds's avatar
      Linux 5.1-rc2 · 8c2ffd91
      Linus Torvalds authored
      8c2ffd91
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 17403fa2
      Linus Torvalds authored
      Pull ext4 fixes from Ted Ts'o:
       "Miscellaneous ext4 bug fixes for 5.1"
      
      * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: prohibit fstrim in norecovery mode
        ext4: cleanup bh release code in ext4_ind_remove_space()
        ext4: brelse all indirect buffer in ext4_ind_remove_space()
        ext4: report real fs size after failed resize
        ext4: add missing brelse() in add_new_gdb_meta_bg()
        ext4: remove useless ext4_pin_inode()
        ext4: avoid panic during forced reboot
        ext4: fix data corruption caused by unaligned direct AIO
        ext4: fix NULL pointer dereference while journal is aborted
      17403fa2
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 231c807a
      Linus Torvalds authored
      Pull scheduler updates from Thomas Gleixner:
       "Third more careful attempt for this set of fixes:
      
         - Prevent a 32bit math overflow in the cpufreq code
      
         - Fix a buffer overflow when scanning the cgroup2 cpu.max property
      
         - A set of fixes for the NOHZ scheduler logic to prevent waking up
           CPUs even if the capacity of the busy CPUs is sufficient along with
           other tweaks optimizing the behaviour for asymmetric systems
           (big/little)"
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/fair: Skip LLC NOHZ logic for asymmetric systems
        sched/fair: Tune down misfit NOHZ kicks
        sched/fair: Comment some nohz_balancer_kick() kick conditions
        sched/core: Fix buffer overflow in cgroup2 property cpu.max
        sched/cpufreq: Fix 32-bit math overflow
      231c807a
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 49ef0156
      Linus Torvalds authored
      Pull perf updates from Thomas Gleixner:
       "A larger set of perf updates.
      
        Not all of them are strictly fixes, but that's solely the tip
        maintainers fault as they let the timely -rc1 pull request fall
        through the cracks for various reasons including travel. So I'm
        sending this nevertheless because rebasing and distangling fixes and
        updates would be a mess and risky as well. As of tomorrow, a strict
        fixes separation is happening again. Sorry for the slip-up.
      
        Kernel:
      
         - Handle RECORD_MMAP vs. RECORD_MMAP2 correctly so different
           consumers of the mmap event get what they requested.
      
        Tools:
      
         - A larger set of updates to perf record/report/scripts vs. time
           stamp handling
      
         - More Python3 fixups
      
         - A pile of memory leak plumbing
      
         - perf BPF improvements and fixes
      
         - Finalize the perf.data directory storage"
      
      [ Note: the kernel part is strictly a fix, the updates are purely to
        tooling       - Linus ]
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (75 commits)
        perf bpf: Show more BPF program info in print_bpf_prog_info()
        perf bpf: Extract logic to create program names from perf_event__synthesize_one_bpf_prog()
        perf tools: Save bpf_prog_info and BTF of new BPF programs
        perf evlist: Introduce side band thread
        perf annotate: Enable annotation of BPF programs
        perf build: Check what binutils's 'disassembler()' signature to use
        perf bpf: Process PERF_BPF_EVENT_PROG_LOAD for annotation
        perf symbols: Introduce DSO_BINARY_TYPE__BPF_PROG_INFO
        perf feature detection: Add -lopcodes to feature-libbfd
        perf top: Add option --no-bpf-event
        perf bpf: Save BTF information as headers to perf.data
        perf bpf: Save BTF in a rbtree in perf_env
        perf bpf: Save bpf_prog_info information as headers to perf.data
        perf bpf: Save bpf_prog_info in a rbtree in perf_env
        perf bpf: Make synthesize_bpf_events() receive perf_session pointer instead of perf_tool
        perf bpf: Synthesize bpf events with bpf_program__get_prog_info_linear()
        bpftool: use bpf_program__get_prog_info_linear() in prog.c:do_dump()
        tools lib bpf: Introduce bpf_program__get_prog_info_linear()
        perf record: Replace option --bpf-event with --no-bpf-event
        perf tests: Fix a memory leak in test__perf_evsel__tp_sched_test()
        ...
      49ef0156
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 19caf581
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A set of x86 fixes:
      
         - Prevent potential NULL pointer dereferences in the HPET and HyperV
           code
      
         - Exclude the GART aperture from /proc/kcore to prevent kernel
           crashes on access
      
         - Use the correct macros for Cyrix I/O on Geode processors
      
         - Remove yet another kernel address printk leak
      
         - Announce microcode reload completion as requested by quite some
           people. Microcode loading has become popular recently.
      
         - Some 'Make Clang' happy fixlets
      
         - A few cleanups for recently added code"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/gart: Exclude GART aperture from kcore
        x86/hw_breakpoints: Make default case in hw_breakpoint_arch_parse() return an error
        x86/mm/pti: Make local symbols static
        x86/cpu/cyrix: Remove {get,set}Cx86_old macros used for Cyrix processors
        x86/cpu/cyrix: Use correct macros for Cyrix calls on Geode processors
        x86/microcode: Announce reload operation's completion
        x86/hyperv: Prevent potential NULL pointer dereference
        x86/hpet: Prevent potential NULL pointer dereference
        x86/lib: Fix indentation issue, remove extra tab
        x86/boot: Restrict header scope to make Clang happy
        x86/mm: Don't leak kernel addresses
        x86/cpufeature: Fix various quality problems in the <asm/cpu_device_hd.h> header
      19caf581
    • Linus Torvalds's avatar
      Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a75eda7b
      Linus Torvalds authored
      Pull timer fixes from Thomas Gleixner:
       "A set of small fixes plus the removal of stale board support code:
      
         - Remove the board support code from the clpx711x clocksource driver.
           This change had fallen through the cracks and I'm sending it now
           rather than dealing with people who want to improve that stale code
           for 3 month.
      
         - Use the proper clocksource mask on RICSV
      
         - Make local scope functions and variables static"
      
      * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        clocksource/drivers/clps711x: Remove board support
        clocksource/drivers/riscv: Fix clocksource mask
        clocksource/drivers/mips-gic-timer: Make gic_compare_irqaction static
        clocksource/drivers/timer-ti-dm: Make omap_dm_timer_set_load_start() static
        clocksource/drivers/tcb_clksrc: Make tc_clksrc_suspend/resume() static
        clocksource/drivers/clps711x: Make clps711x_clksrc_init() static
        time/jiffies: Make refined_jiffies static
      a75eda7b
    • Linus Torvalds's avatar
      Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f6cc519b
      Linus Torvalds authored
      Pull locking fixes from Thomas Gleixner:
       "Two small fixes:
      
         - Cure a recently introduces error path hickup which tries to
           unregister a not registered lockdep key in te workqueue code
      
         - Prevent unaligned cmpxchg() crashes in the robust list handling
           code by sanity checking the user space supplied futex pointer"
      
      * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        futex: Ensure that futex address is aligned in handle_futex_death()
        workqueue: Only unregister a registered lockdep key
      f6cc519b
    • Linus Torvalds's avatar
      Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e08fef88
      Linus Torvalds authored
      Pull irq fixes from Thomas Gleixner:
       "A set of fixes for the interrupt subsystem:
      
         - Remove secondary GIC support on systems w/o device-tree support
      
         - A set of small fixlets in various irqchip drivers
      
         - static and fall-through annotations
      
         - Kernel doc and typo fixes"
      
      * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        genirq: Mark expected switch case fall-through
        genirq/devres: Remove excess parameter from kernel doc
        irqchip/irq-mvebu-sei: Make mvebu_sei_ap806_caps static
        irqchip/mbigen: Don't clear eventid when freeing an MSI
        irqchip/stm32: Don't set rising configuration registers at init
        irqchip/stm32: Don't clear rising/falling config registers at init
        dt-bindings: irqchip: renesas-irqc: Document r8a774c0 support
        irqchip/mmp: Make mmp_irq_domain_ops static
        irqchip/brcmstb-l2: Make two init functions static
        genirq: Fix typo in comment of IRQD_MOVE_PCNTXT
        irqchip/gic-v3-its: Fix comparison logic in lpi_range_cmp
        irqchip/gic: Drop support for secondary GIC in non-DT systems
        irqchip/imx-irqsteer: Fix of_property_read_u32() error handling
      e08fef88
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 1ebf5afb
      Linus Torvalds authored
      Pull core fixes from Thomas Gleixner:
       "Two small fixes:
      
         - Move the large objtool_file struct off the stack so objtool works
           in setups with a tight stack limit.
      
         - Make a few variables static in the watchdog core code"
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        watchdog/core: Make variables static
        objtool: Move objtool_file struct off the stack
      1ebf5afb
    • Linus Torvalds's avatar
      Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux · 9fc13bbd
      Linus Torvalds authored
      Pull thermal management fixes from Zhang Rui:
      
       - Fix a wrong __percpu structure declaration in intel_powerclamp driver
         (Luc Van Oostenryck)
      
       - Fix truncated name of the idle injection kthreads created by
         intel_powerclamp driver (Zhang Rui)
      
       - Fix the missing UUID supports in int3400 thermal driver (Matthew
         Garrett)
      
       - Fix a crash when accessing the debugfs of bcm2835 SoC thermal driver
         (Phil Elwell)
      
       - A couple of trivial fixes/cleanups in some SoC thermal drivers
      
      * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
        thermal/intel_powerclamp: fix truncated kthread name
        thermal: mtk: Allocate enough space for mtk_thermal.
        thermal/int340x_thermal: fix mode setting
        thermal/int340x_thermal: Add additional UUIDs
        thermal: cpu_cooling: Remove unused cur_freq variable
        thermal: bcm2835: Fix crash in bcm2835_thermal_debugfs
        thermal: samsung: Fix incorrect check after code merge
        thermal/intel_powerclamp: fix __percpu declaration of worker_data
      9fc13bbd
    • Linus Torvalds's avatar
      Merge tag '5.1-rc1-cifs-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6 · 38104c00
      Linus Torvalds authored
      Pull smb3 fixes from Steve French:
      
       - two fixes for stable for guest mount problems with smb3.1.1
      
       - two fixes for crediting (SMB3 flow control) on resent requests
      
       - a byte range lock leak fix
      
       - two fixes for incorrect rc mappings
      
      * tag '5.1-rc1-cifs-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
        cifs: update internal module version number
        SMB3: Fix SMB3.1.1 guest mounts to Samba
        cifs: Fix slab-out-of-bounds when tracing SMB tcon
        cifs: allow guest mounts to work for smb3.11
        fix incorrect error code mapping for OBJECTID_NOT_FOUND
        cifs: fix that return -EINVAL when do dedupe operation
        CIFS: Fix an issue with re-sending rdata when transport returning -EAGAIN
        CIFS: Fix an issue with re-sending wdata when transport returning -EAGAIN
      38104c00
    • Linus Torvalds's avatar
      Merge tag 'auxdisplay-for-linus-v5.1-rc2' of git://github.com/ojeda/linux · e0046bb3
      Linus Torvalds authored
      Pull auxdisplay updates from Miguel Ojeda:
       "A few fixes and improvements for auxdisplay:
      
         - Series to fix a memory leak in hd44780 while introducing
           charlcd_free(). From Andy Shevchenko
      
         - Series to clean up the Kconfig menus and a couple of improvements
           for charlcd. From Mans Rullgard"
      
      * tag 'auxdisplay-for-linus-v5.1-rc2' of git://github.com/ojeda/linux:
        auxdisplay: charlcd: make backlight initial state configurable
        auxdisplay: charlcd: simplify init message display
        auxdisplay: deconfuse configuration
        auxdisplay: hd44780: Convert to use charlcd_free()
        auxdisplay: panel: Convert to use charlcd_free()
        auxdisplay: charlcd: Introduce charlcd_free() helper
        auxdisplay: charlcd: Move to_priv() to charlcd namespace
        auxdisplay: hd44780: Fix memory leak on ->remove()
      e0046bb3
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 1fa8109f
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "Six fixes to four drivers and two core fixes.
      
        One core fix simply corrects a missed destroy_rcu_head() but the other
        is hopefully the end of an ongoing effort to make suspend/resume play
        nicely with scsi quiesce"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: ibmvscsi: Fix empty event pool access during host removal
        scsi: ibmvscsi: Protect ibmvscsi_head from concurrent modificaiton
        scsi: hisi_sas: Add softreset in hisi_sas_I_T_nexus_reset()
        scsi: qla2xxx: Fix NULL pointer crash due to stale CPUID
        scsi: qla2xxx: Fix FC-AL connection target discovery
        scsi: core: Avoid that a kernel warning appears during system resume
        scsi: core: Also call destroy_rcu_head() for passthrough requests
        scsi: iscsi: flush running unbind operations when removing a session
      1fa8109f
    • Alexander Shiyan's avatar
      clocksource/drivers/clps711x: Remove board support · 2a6a8e2d
      Alexander Shiyan authored
      Since board support for the CLPS711X platform was removed,
      remove the board support from the clps711x-timer driver.
      Signed-off-by: default avatarAlexander Shiyan <shc_work@mail.ru>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
      Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
      Link: https://lkml.kernel.org/r/20181220111626.17140-1-shc_work@mail.ru
      2a6a8e2d
  9. 23 Mar, 2019 13 commits
    • Linus Torvalds's avatar
      Merge tag 'io_uring-20190323' of git://git.kernel.dk/linux-block · 1bdd3dbf
      Linus Torvalds authored
      Pull io_uring fixes and improvements from Jens Axboe:
       "The first five in this series are heavily inspired by the work Al did
        on the aio side to fix the races there.
      
        The last two re-introduce a feature that was in io_uring before it got
        merged, but which I pulled since we didn't have a good way to have
        BVEC iters that already have a stable reference. These aren't
        necessarily related to block, it's just how io_uring pins fixed
        buffers"
      
      * tag 'io_uring-20190323' of git://git.kernel.dk/linux-block:
        block: add BIO_NO_PAGE_REF flag
        iov_iter: add ITER_BVEC_FLAG_NO_REF flag
        io_uring: mark me as the maintainer
        io_uring: retry bulk slab allocs as single allocs
        io_uring: fix poll races
        io_uring: fix fget/fput handling
        io_uring: add prepped flag
        io_uring: make io_read/write return an integer
        io_uring: use regular request ref counts
      1bdd3dbf
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20190323' of git://git.kernel.dk/linux-block · 2335cbe6
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "A set of fixes/changes that should go into this series. This contains:
      
         - Kernel doc / comment updates (Bart, Shenghui)
      
         - Un-export of core-only used function (Bart)
      
         - Fix race on loop file access (Dongli)
      
         - pf/pcd queue cleanup fixes (me)
      
         - Use appropriate helper for RESTART bit set (Yufen)
      
         - Use named identifier for classic poll (Yufen)"
      
      * tag 'for-linus-20190323' of git://git.kernel.dk/linux-block:
        sbitmap: trivial - update comment for sbitmap_deferred_clear_bit
        blkcg: Fix kernel-doc warnings
        blk-iolatency: #include "blk.h"
        block: Unexport blk_mq_add_to_requeue_list()
        block: add BLK_MQ_POLL_CLASSIC for hybrid poll and return EINVAL for unexpected value
        blk-mq: remove unused 'nr_expired' from blk_mq_hw_ctx
        loop: access lo_backing_file only when the loop device is Lo_bound
        blk-mq: use blk_mq_sched_mark_restart_hctx to set RESTART
        paride/pcd: cleanup queues when detection fails
        paride/pf: cleanup queues when detection fails
      2335cbe6
    • Linus Torvalds's avatar
      Merge tag 'ceph-for-5.1-rc2' of git://github.com/ceph/ceph-client · 9a1050ad
      Linus Torvalds authored
      Pull ceph fixes from Ilya Dryomov:
       "A follow up for the new alloc_size logic and a blacklisting fix,
        marked for stable"
      
      * tag 'ceph-for-5.1-rc2' of git://github.com/ceph/ceph-client:
        rbd: drop wait_for_latest_osdmap()
        libceph: wait for latest osdmap in ceph_monc_blacklist_add()
        rbd: set io_min, io_opt and discard_granularity to alloc_size
      9a1050ad
    • Darrick J. Wong's avatar
      ext4: prohibit fstrim in norecovery mode · 18915b58
      Darrick J. Wong authored
      The ext4 fstrim implementation uses the block bitmaps to find free space
      that can be discarded.  If we haven't replayed the journal, the bitmaps
      will be stale and we absolutely *cannot* use stale metadata to zap the
      underlying storage.
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      18915b58
    • zhangyi (F)'s avatar
      ext4: cleanup bh release code in ext4_ind_remove_space() · 5e86bdda
      zhangyi (F) authored
      Currently, we are releasing the indirect buffer where we are done with
      it in ext4_ind_remove_space(), so we can see the brelse() and
      BUFFER_TRACE() everywhere.  It seems fragile and hard to read, and we
      may probably forget to release the buffer some day.  This patch cleans
      up the code by putting of the code which releases the buffers to the
      end of the function.
      Signed-off-by: default avatarzhangyi (F) <yi.zhang@huawei.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      5e86bdda
    • zhangyi (F)'s avatar
      ext4: brelse all indirect buffer in ext4_ind_remove_space() · 674a2b27
      zhangyi (F) authored
      All indirect buffers get by ext4_find_shared() should be released no
      mater the branch should be freed or not. But now, we forget to release
      the lower depth indirect buffers when removing space from the same
      higher depth indirect block. It will lead to buffer leak and futher
      more, it may lead to quota information corruption when using old quota,
      consider the following case.
      
       - Create and mount an empty ext4 filesystem without extent and quota
         features,
       - quotacheck and enable the user & group quota,
       - Create some files and write some data to them, and then punch hole
         to some files of them, it may trigger the buffer leak problem
         mentioned above.
       - Disable quota and run quotacheck again, it will create two new
         aquota files and write the checked quota information to them, which
         probably may reuse the freed indirect block(the buffer and page
         cache was not freed) as data block.
       - Enable quota again, it will invoke
         vfs_load_quota_inode()->invalidate_bdev() to try to clean unused
         buffers and pagecache. Unfortunately, because of the buffer of quota
         data block is still referenced, quota code cannot read the up to date
         quota info from the device and lead to quota information corruption.
      
      This problem can be reproduced by xfstests generic/231 on ext3 file
      system or ext4 file system without extent and quota features.
      
      This patch fix this problem by releasing the missing indirect buffers,
      in ext4_ind_remove_space().
      Reported-by: default avatarHulk Robot <hulkci@huawei.com>
      Signed-off-by: default avatarzhangyi (F) <yi.zhang@huawei.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Cc: stable@kernel.org
      674a2b27
    • Gustavo A. R. Silva's avatar
      genirq: Mark expected switch case fall-through · 93417a3f
      Gustavo A. R. Silva authored
      In preparation to enabling -Wimplicit-fallthrough, mark switch
      cases where we are expecting to fall through.
      
      With -Wimplicit-fallthrough added to CFLAGS:
      
       kernel/irq/manage.c: In function ‘irq_do_set_affinity’:
       kernel/irq/manage.c:198:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
         cpumask_copy(desc->irq_common_data.affinity, mask);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       kernel/irq/manage.c:199:2: note: here
         case IRQ_SET_MASK_OK_NOCOPY:
         ^~~~
      
      Annotate it.
      Signed-off-by: default avatarGustavo A. R. Silva <gustavo@embeddedor.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: Kees Cook <keescook@chromium.org>
      Link: https://lkml.kernel.org/r/20190228213714.GA9246@embeddedor
      93417a3f
    • Atish Patra's avatar
      clocksource/drivers/riscv: Fix clocksource mask · 32d0be01
      Atish Patra authored
      For all riscv architectures (RV32, RV64 and RV128), the clocksource
      is a 64 bit incrementing counter.
      
      Fix the clock source mask accordingly.
      
      Tested on both 64bit and 32 bit virt machine in QEMU.
      
      Fixes: 62b01943 ("clocksource: new RISC-V SBI timer driver")
      Signed-off-by: default avatarAtish Patra <atish.patra@wdc.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
      Cc: Albert Ou <aou@eecs.berkeley.edu>
      Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
      Cc: linux-riscv@lists.infradead.org
      Cc: Palmer Dabbelt <palmer@sifive.com>
      Cc: Anup Patel <Anup.Patel@wdc.com>
      Cc: Damien Le Moal <Damien.LeMoal@wdc.com>
      Cc: stable@vger.kernel.org
      Link: https://lkml.kernel.org/r/20190322215411.19362-1-atish.patra@wdc.com
      32d0be01
    • Kairui Song's avatar
      x86/gart: Exclude GART aperture from kcore · ffc8599a
      Kairui Song authored
      On machines where the GART aperture is mapped over physical RAM,
      /proc/kcore contains the GART aperture range. Accessing the GART range via
      /proc/kcore results in a kernel crash.
      
      vmcore used to have the same issue, until it was fixed with commit
      2a3e83c6 ("x86/gart: Exclude GART aperture from vmcore")', leveraging
      existing hook infrastructure in vmcore to let /proc/vmcore return zeroes
      when attempting to read the aperture region, and so it won't read from the
      actual memory.
      
      Apply the same workaround for kcore. First implement the same hook
      infrastructure for kcore, then reuse the hook functions introduced in the
      previous vmcore fix. Just with some minor adjustment, rename some functions
      for more general usage, and simplify the hook infrastructure a bit as there
      is no module usage yet.
      Suggested-by: default avatarBaoquan He <bhe@redhat.com>
      Signed-off-by: default avatarKairui Song <kasong@redhat.com>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Reviewed-by: default avatarJiri Bohac <jbohac@suse.cz>
      Acked-by: default avatarBaoquan He <bhe@redhat.com>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Omar Sandoval <osandov@fb.com>
      Cc: Dave Young <dyoung@redhat.com>
      Link: https://lkml.kernel.org/r/20190308030508.13548-1-kasong@redhat.com
      
      ffc8599a
    • Steve French's avatar
      cifs: update internal module version number · cf7d624f
      Steve French authored
      To 2.19
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      cf7d624f
    • Steve French's avatar
      SMB3: Fix SMB3.1.1 guest mounts to Samba · 8c11a607
      Steve French authored
      Workaround problem with Samba responses to SMB3.1.1
      null user (guest) mounts.  The server doesn't set the
      expected flag in the session setup response so we have
      to do a similar check to what is done in smb3_validate_negotiate
      where we also check if the user is a null user (but not sec=krb5
      since username might not be passed in on mount for Kerberos case).
      
      Note that the commit below tightened the conditions and forced signing
      for the SMB2-TreeConnect commands as per MS-SMB2.
      However, this should only apply to normal user sessions and not for
      cases where there is no user (even if server forgets to set the flag
      in the response) since we don't have anything useful to sign with.
      This is especially important now that the more secure SMB3.1.1 protocol
      is in the default dialect list.
      
      An earlier patch ("cifs: allow guest mounts to work for smb3.11") fixed
      the guest mounts to Windows.
      
          Fixes: 6188f28b ("Tree connect for SMB3.1.1 must be signed for non-encrypted shares")
      Reviewed-by: default avatarRonnie Sahlberg <lsahlber@redhat.com>
      Reviewed-by: default avatarPaulo Alcantara <palcantara@suse.de>
      CC: Stable <stable@vger.kernel.org>
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      8c11a607
    • Paulo Alcantara (SUSE)'s avatar
      cifs: Fix slab-out-of-bounds when tracing SMB tcon · 68ddb496
      Paulo Alcantara (SUSE) authored
      This patch fixes the following KASAN report:
      
      [  779.044746] BUG: KASAN: slab-out-of-bounds in string+0xab/0x180
      [  779.044750] Read of size 1 at addr ffff88814f327968 by task trace-cmd/2812
      
      [  779.044756] CPU: 1 PID: 2812 Comm: trace-cmd Not tainted 5.1.0-rc1+ #62
      [  779.044760] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-0-ga698c89-prebuilt.qemu.org 04/01/2014
      [  779.044761] Call Trace:
      [  779.044769]  dump_stack+0x5b/0x90
      [  779.044775]  ? string+0xab/0x180
      [  779.044781]  print_address_description+0x6c/0x23c
      [  779.044787]  ? string+0xab/0x180
      [  779.044792]  ? string+0xab/0x180
      [  779.044797]  kasan_report.cold.3+0x1a/0x32
      [  779.044803]  ? string+0xab/0x180
      [  779.044809]  string+0xab/0x180
      [  779.044816]  ? widen_string+0x160/0x160
      [  779.044822]  ? vsnprintf+0x5bf/0x7f0
      [  779.044829]  vsnprintf+0x4e7/0x7f0
      [  779.044836]  ? pointer+0x4a0/0x4a0
      [  779.044841]  ? seq_buf_vprintf+0x79/0xc0
      [  779.044848]  seq_buf_vprintf+0x62/0xc0
      [  779.044855]  trace_seq_printf+0x113/0x210
      [  779.044861]  ? trace_seq_puts+0x110/0x110
      [  779.044867]  ? trace_raw_output_prep+0xd8/0x110
      [  779.044876]  trace_raw_output_smb3_tcon_class+0x9f/0xc0
      [  779.044882]  print_trace_line+0x377/0x890
      [  779.044888]  ? tracing_buffers_read+0x300/0x300
      [  779.044893]  ? ring_buffer_read+0x58/0x70
      [  779.044899]  s_show+0x6e/0x140
      [  779.044906]  seq_read+0x505/0x6a0
      [  779.044913]  vfs_read+0xaf/0x1b0
      [  779.044919]  ksys_read+0xa1/0x130
      [  779.044925]  ? kernel_write+0xa0/0xa0
      [  779.044931]  ? __do_page_fault+0x3d5/0x620
      [  779.044938]  do_syscall_64+0x63/0x150
      [  779.044944]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
      [  779.044949] RIP: 0033:0x7f62c2c2db31
      [ 779.044955] Code: fe ff ff 48 8d 3d 17 9e 09 00 48 83 ec 08 e8 96 02
      02 00 66 0f 1f 44 00 00 8b 05 fa fc 2c 00 48 63 ff 85 c0 75 13 31 c0
      0f 05 <48> 3d 00 f0 ff ff 77 57 f3 c3 0f 1f 44 00 00 55 53 48 89 d5 48
      89
      [  779.044958] RSP: 002b:00007ffd6e116678 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
      [  779.044964] RAX: ffffffffffffffda RBX: 0000560a38be9260 RCX: 00007f62c2c2db31
      [  779.044966] RDX: 0000000000002000 RSI: 00007ffd6e116710 RDI: 0000000000000003
      [  779.044966] RDX: 0000000000002000 RSI: 00007ffd6e116710 RDI: 0000000000000003
      [  779.044969] RBP: 00007f62c2ef5420 R08: 0000000000000000 R09: 0000000000000003
      [  779.044972] R10: ffffffffffffffa8 R11: 0000000000000246 R12: 00007ffd6e116710
      [  779.044975] R13: 0000000000002000 R14: 0000000000000d68 R15: 0000000000002000
      
      [  779.044981] Allocated by task 1257:
      [  779.044987]  __kasan_kmalloc.constprop.5+0xc1/0xd0
      [  779.044992]  kmem_cache_alloc+0xad/0x1a0
      [  779.044997]  getname_flags+0x6c/0x2a0
      [  779.045003]  user_path_at_empty+0x1d/0x40
      [  779.045008]  do_faccessat+0x12a/0x330
      [  779.045012]  do_syscall_64+0x63/0x150
      [  779.045017]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      [  779.045019] Freed by task 1257:
      [  779.045023]  __kasan_slab_free+0x12e/0x180
      [  779.045029]  kmem_cache_free+0x85/0x1b0
      [  779.045034]  filename_lookup.part.70+0x176/0x250
      [  779.045039]  do_faccessat+0x12a/0x330
      [  779.045043]  do_syscall_64+0x63/0x150
      [  779.045048]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      [  779.045052] The buggy address belongs to the object at ffff88814f326600
      which belongs to the cache names_cache of size 4096
      [  779.045057] The buggy address is located 872 bytes to the right of
      4096-byte region [ffff88814f326600, ffff88814f327600)
      [  779.045058] The buggy address belongs to the page:
      [  779.045062] page:ffffea00053cc800 count:1 mapcount:0 mapping:ffff88815b191b40 index:0x0 compound_mapcount: 0
      [  779.045067] flags: 0x200000000010200(slab|head)
      [  779.045075] raw: 0200000000010200 dead000000000100 dead000000000200 ffff88815b191b40
      [  779.045081] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
      [  779.045083] page dumped because: kasan: bad access detected
      
      [  779.045085] Memory state around the buggy address:
      [  779.045089]  ffff88814f327800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045093]  ffff88814f327880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045097] >ffff88814f327900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045099]                                                           ^
      [  779.045103]  ffff88814f327980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045107]  ffff88814f327a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
      [  779.045109] ==================================================================
      [  779.045110] Disabling lock debugging due to kernel taint
      
      Correctly assign tree name str for smb3_tcon event.
      Signed-off-by: default avatarPaulo Alcantara (SUSE) <paulo@paulo.ac>
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      68ddb496
    • Ronnie Sahlberg's avatar
      cifs: allow guest mounts to work for smb3.11 · e71ab2aa
      Ronnie Sahlberg authored
      Fix Guest/Anonymous sessions so that they work with SMB 3.11.
      
      The commit noted below tightened the conditions and forced signing for
      the SMB2-TreeConnect commands as per MS-SMB2.
      However, this should only apply to normal user sessions and not for
      Guest/Anonumous sessions.
      
      Fixes: 6188f28b ("Tree connect for SMB3.1.1 must be signed for non-encrypted shares")
      Signed-off-by: default avatarRonnie Sahlberg <lsahlber@redhat.com>
      CC: Stable <stable@vger.kernel.org>
      Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
      e71ab2aa