Commit Graph

692613 Commits

Author SHA1 Message Date
Linus Torvalds
d1faa3e78a Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Thomas Gleixner:
 "A single fix for a multiplication overflow in the timer code on 32bit
  systems"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timers: Fix overflow in get_next_timer_interrupt
2017-08-04 15:14:09 -07:00
Linus Torvalds
65f4740e72 ARM: SoC fixes for 4.13
This comes a bit later than I planned, and as a consequence is a larger
 than it should be.
 
 Most of the changes are devicetree fixes, across lots of platforms:
 Renesas, Samsung Exynos, Marvell EBU, TI OMAP, Rockchips, Amlogic Meson,
 Sigma Desings Tango, Allwinner SUNxi and TI Davinci.
 
 Also across many platforms, I applied an older series of simple randconfig
 build fixes. This includes making the CONFIG_MTD_XIP option compile again,
 which had been broken for many years and probably has not been missed, but
 it felt wrong to just remove it completely.
 
 The only other changes are:
 
  - We enable HWSPINLOCK in defconfig to get some Qualcomm boards
    to work out of the box.
 
  - A few regression fixes for Texas Instruments OMAP2+.
 
  - A boot regression fix for the Renesas regulator quirk.
 
  - A suspend/resume fix for Uniphier SoCs, fixing the resume of the
    system bus.
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Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "This comes a bit later than I planned, and as a consequence is a
  larger than it should be.

  Most of the changes are devicetree fixes, across lots of platforms:
  Renesas, Samsung Exynos, Marvell EBU, TI OMAP, Rockchips, Amlogic
  Meson, Sigma Desings Tango, Allwinner SUNxi and TI Davinci.

  Also across many platforms, I applied an older series of simple
  randconfig build fixes. This includes making the CONFIG_MTD_XIP option
  compile again, which had been broken for many years and probably has
  not been missed, but it felt wrong to just remove it completely.

  The only other changes are:

   - We enable HWSPINLOCK in defconfig to get some Qualcomm boards to
     work out of the box.

   - A few regression fixes for Texas Instruments OMAP2+.

   - A boot regression fix for the Renesas regulator quirk.

   - A suspend/resume fix for Uniphier SoCs, fixing the resume of the
     system bus"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (43 commits)
  ARM: dts: tango4: Request RGMII RX and TX clock delays
  bus: uniphier-system-bus: set up registers when resuming
  ARM64: dts: marvell: armada-37xx: Fix the number of GPIO on south bridge
  ARM: shmobile: rcar-gen2: Fix deadlock in regulator quirk
  arm64: defconfig: enable missing HWSPINLOCK
  ARM: pxa: select both FB and FB_W100 for eseries
  ARM: ixp4xx: fix ioport_unmap definition
  ARM: ep93xx: use ARM_PATCH_PHYS_VIRT correctly
  ARM: mmp: mark usb_dma_mask as __maybe_unused
  ARM: omap2: mark unused functions as __maybe_unused
  ARM: omap1: avoid unused variable warning
  ARM: sirf: mark sirfsoc_init_late as __maybe_unused
  ARM: ixp4xx: use normal prototype for {read,write}s{b,w,l}
  ARM: omap1/ams-delta: warn about failed regulator enable
  ARM: rpc: rename RAM_SIZE macro
  ARM: w90x900: normalize clk API
  ARM: ep93xx: normalize clk API
  ARM: dts: sun8i: a83t: Switch to CCU device tree binding macros
  arm64: allwinner: sun50i-a64: Correct emac register size
  ARM: dts: sunxi: h3/h5: Correct emac register size
  ...
2017-08-04 15:12:15 -07:00
Linus Torvalds
b3c6858fb1 arm64 fixes:
- Report correct timer frequency to userspace when trapping CNTFRQ_EL0
 
 - Fix race with hardware page table updates when updating access flags
 
 - Silence clang overflow warning in VA_START and PAGE_OFFSET calculations
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Here are some more arm64 fixes for 4.13. The main one is the PTE race
  with the hardware walker, but there are a couple of other things too.

   - Report correct timer frequency to userspace when trapping
     CNTFRQ_EL0

   - Fix race with hardware page table updates when updating access
     flags

   - Silence clang overflow warning in VA_START and PAGE_OFFSET
     calculations"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: avoid overflow in VA_START and PAGE_OFFSET
  arm64: Fix potential race with hardware DBM in ptep_set_access_flags()
  arm64: Use arch_timer_get_rate when trapping CNTFRQ_EL0
2017-08-04 12:11:48 -07:00
Linus Torvalds
0a23ea65ce Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc fixes from David Miller:

 - block interrupts properly across the entire MMU context change (both
   the hw MMU context change and the TSB table change) so that we don't
   get a perf event interrupt in the middle. From Rob Gardner.

 - be sure to register hugepages early enough, from Nitin Gupta.

 - UltraSPARC-III user copy exception handling would return garbage for
   the copied length in some circumstances.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Fix exception handling in UltraSPARC-III memcpy.
  sbus: Convert to using %pOF instead of full_name
  sparc: defconfig: Cleanup from old Kconfig options
  sparc64: Register hugepages during arch init
  sparc64: Prevent perf from running during super critical sections
2017-08-04 10:17:45 -07:00
Linus Torvalds
c63716ab4d A bunch of fixes and follow-ups for -rc1 Luminous patches: issues with
->reencode_message() and last minute RADOS semantic changes in v12.1.2.
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Merge tag 'ceph-for-4.13-rc4' of git://github.com/ceph/ceph-client

Pull ceph fixes from Ilya Dryomov:
 "A bunch of fixes and follow-ups for -rc1 Luminous patches: issues with
  ->reencode_message() and last minute RADOS semantic changes in
  v12.1.2"

* tag 'ceph-for-4.13-rc4' of git://github.com/ceph/ceph-client:
  libceph: make RECOVERY_DELETES feature create a new interval
  libceph: upmap semantic changes
  crush: assume weight_set != null imples weight_set_size > 0
  libceph: fallback for when there isn't a pool-specific choose_arg
  libceph: don't call ->reencode_message() more than once per message
  libceph: make encode_request_*() work with r_mempool requests
2017-08-04 10:15:11 -07:00
Linus Torvalds
a64c40e79f sound fixes for 4.13-rc4
Now we hit the usual ASoC-fix-flood in the middle of release.
 Most of changes are trivial and device-specific, while one significant
 change is the fix for unbalanced of_graph_*() refcounts.  This
 involved with the change in the graph API itself that had been a bit
 messy.
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Merge tag 'sound-4.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Now we hit the usual ASoC-fix-flood in the middle of release.

  Most of the changes are trivial and device-specific, while one
  significant change is the fix for unbalanced of_graph_*() refcounts.
  This involved a change in the graph API itself that had been a bit
  messy"

* tag 'sound-4.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Fix speaker output from VAIO VPCL14M1R
  device property: Fix usecount for of_graph_get_port_parent()
  ASoC: rt5665: fix wrong register for bclk ratio control
  ASoC: Intel: Use MCLK instead of BLCK as the sysclock for RT5514 codec on kabylake platform
  ASoC: Intel: Enabling ASRC for RT5663 codec on kabylake platform
  ASoC: codecs: msm8916-analog: fix DIG_CLK_CTL_RXD3_CLK_EN define
  ASoC: Intel: Skylake: Fix missing sentinels in sst_acpi_mach
  ASoC: sh: hac: add missing "int ret"
  ASoC: samsung: odroid: Fix EPLL frequency values
  ASoC: sgtl5000: Use snd_soc_kcontrol_codec()
  ASoC: rt5665: fix GPIO6 pin function define
  ASoC: ux500: Restore platform DAI assignments
  ASoC: fix pcm-creation regression
  ASoC: do not close shared backend dailink
  ASoC: pxa: SND_PXA2XX_SOC should depend on HAS_DMA
  ASoC: Intel: Skylake: Fix default dma_buffer_size
  ASoC: rt5663: Update the HW default values based on the shipping version
  ASoC: imx-ssi: add check on platform_get_irq return value
2017-08-04 10:11:13 -07:00
Linus Torvalds
83b89ea4ad IOMMU Fixes for Linux v4.13-rc3
Including:
 
 	- Fix a scheduling-while-atomic bug in the AMD IOMMU driver. It
 	  was found after the checker was enabled earlier.
 
 	- A fix for the virtual APIC code in the AMD IOMMU driver which
 	  delivers device interrupts directly into KVM guests for
 	  assigned devices.
 
 	- Fixes for the recently merged lock-less page-table code for
 	  ARM. The redundant TLB syncs got reverted and locks added
 	  again around the TLB sync code.
 
 	- Fix for error handling in arm_smmu_add_device()
 
 	- Address sanitization fix for arm io-pgtable code
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Merge tag 'iommu-fixes-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:

 - fix a scheduling-while-atomic bug in the AMD IOMMU driver. It was
   found after the checker was enabled earlier.

 - a fix for the virtual APIC code in the AMD IOMMU driver which
   delivers device interrupts directly into KVM guests for assigned
   devices.

 - fixes for the recently merged lock-less page-table code for ARM. The
   redundant TLB syncs got reverted and locks added again around the TLB
   sync code.

 - fix for error handling in arm_smmu_add_device()

 - address sanitization fix for arm io-pgtable code

* tag 'iommu-fixes-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix schedule-while-atomic BUG in initialization code
  iommu/amd: Enable ga_log_intr when enabling guest_mode
  iommu/io-pgtable: Sanitise map/unmap addresses
  iommu/arm-smmu: Fix the error path in arm_smmu_add_device
  Revert "iommu/io-pgtable: Avoid redundant TLB syncs"
  iommu/mtk: Avoid redundant TLB syncs locally
  iommu/arm-smmu: Reintroduce locking around TLB sync operations
2017-08-04 10:05:29 -07:00
Linus Torvalds
8145f373ae MMC core:
- Fix NULL pointer dereference for block I/O during hotplug
 MMC host:
  - sdhci-of-at91: Fix card detect for non-removable cards
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Merge tag 'mmc-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "A couple of mmc fixes intended for v4.13-rc4.

  MMC core:
   - Fix NULL pointer dereference for block I/O during hotplug

  MMC host:
   - sdhci-of-at91: Fix card detect for non-removable cards"

* tag 'mmc-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: block: bypass the queue even if usage is present for hotplug
  mmc: sdhci-of-at91: force card detect value for non removable devices
2017-08-04 10:02:56 -07:00
Linus Torvalds
47d47585d0 just some lonely amd fixes
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Merge tag 'drm-fixes-for-v4.13-rc4' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Either my email ate everything or everyone is on holidays, either way
  all I can find is some lonely AMD fixes"

[ Europe might be on vacation, and the Pacific NW is too hot for work. ]

* tag 'drm-fixes-for-v4.13-rc4' of git://people.freedesktop.org/~airlied/linux:
  drm/amdgpu: Use list_del_init in amdgpu_mn_unregister
  drm/amdgpu: Fix undue fallthroughs in golden registers initialization
  drm/amdgpu: fix header on gfx9 clear state
2017-08-04 09:59:24 -07:00
Linus Torvalds
841fe95303 powerpc fixes for 4.13 #5
Fixes for recently merged code:
  - a fix for the _PAGE_DEVMAP support, which was breaking KVM on Power9 radix
  - avoid a (harmless) lockdep warning in the early SMP code
  - return failure for some uses of dma_set_mask() rather than falling back to 32-bits
  - fix stack setup in watchdog soft_nmi_common() to use emergency stack
  - fix of_irq_to_resource() error check in of_fsl_spi_probe()
 
 Two fixes going to stable:
  - fix saving of Transactional Memory SPRs in core dump
  - fix __check_irq_replay missing decrementer interrupt
 
 And two misc:
  - fix 64-bit boot wrapper build with non-biarch compiler
  - work around a POWER9 PMU hang after state-loss idle
 
 Thanks to:
   Alistair Popple, Aneesh Kumar K.V, Cyril Bur, Gustavo Romero, Jose Ricardo
   Ziviani, Laurent Vivier, Nicholas Piggin, Oliver O'Halloran, Sergei Shtylyov,
   Suraj Jitindar Singh, Thomas Gleixner.
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Merge tag 'powerpc-4.13-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Fixes for recently merged code:
   - a fix for the _PAGE_DEVMAP support, which was breaking KVM on
     Power9 radix
   - avoid a (harmless) lockdep warning in the early SMP code
   - return failure for some uses of dma_set_mask() rather than falling
     back to 32-bits
   - fix stack setup in watchdog soft_nmi_common() to use emergency
     stack
   - fix of_irq_to_resource() error check in of_fsl_spi_probe()

  Two fixes going to stable:
   - fix saving of Transactional Memory SPRs in core dump
   - fix __check_irq_replay missing decrementer interrupt

  And two misc:
   - fix 64-bit boot wrapper build with non-biarch compiler
   - work around a POWER9 PMU hang after state-loss idle

  Thanks to: Alistair Popple, Aneesh Kumar K.V, Cyril Bur, Gustavo
  Romero, Jose Ricardo Ziviani, Laurent Vivier, Nicholas Piggin, Oliver
  O'Halloran, Sergei Shtylyov, Suraj Jitindar Singh, Thomas Gleixner"

* tag 'powerpc-4.13-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64: Fix __check_irq_replay missing decrementer interrupt
  powerpc/perf: POWER9 PMU stops after idle workaround
  powerpc/83xx/mpc832x_rdb: fix of_irq_to_resource() error check
  powerpc/64s: Fix stack setup in watchdog soft_nmi_common()
  powerpc/powernv/pci: Return failure for some uses of dma_set_mask()
  powerpc/boot: Fix 64-bit boot wrapper build with non-biarch compiler
  powerpc/smp: Call smp_ops->setup_cpu() directly on the boot CPU
  powerpc/tm: Fix saving of TM SPRs in core dump
  powerpc/mm: Fix pmd/pte_devmap() on non-leaf entries
2017-08-04 09:56:54 -07:00
David S. Miller
0ede1c4013 sparc64: Fix exception handling in UltraSPARC-III memcpy.
Mikael Pettersson reported that some test programs in the strace-4.18
testsuite cause an OOPS.

After some debugging it turns out that garbage values are returned
when an exception occurs, causing the fixup memset() to be run with
bogus arguments.

The problem is that two of the exception handler stubs write the
successfully copied length into the wrong register.

Fixes: ee841d0aff ("sparc64: Convert U3copy_{from,to}_user to accurate exception reporting.")
Reported-by: Mikael Pettersson <mikpelinux@gmail.com>
Tested-by: Mikael Pettersson <mikpelinux@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-04 09:47:52 -07:00
Nick Desaulniers
82cd588052 arm64: avoid overflow in VA_START and PAGE_OFFSET
The bitmask used to define these values produces overflow, as seen by
this compiler warning:

arch/arm64/kernel/head.S:47:8: warning:
      integer overflow in preprocessor expression
  #elif (PAGE_OFFSET & 0x1fffff) != 0
         ^~~~~~~~~~~
arch/arm64/include/asm/memory.h:52:46: note:
      expanded from macro 'PAGE_OFFSET'
  #define PAGE_OFFSET             (UL(0xffffffffffffffff) << (VA_BITS -
1))
                                      ~~~~~~~~~~~~~~~~~~  ^

It would be preferrable to use GENMASK_ULL() instead, but it's not set
up to be used from assembly (the UL() macro token pastes UL suffixes
when not included in assembly sources).

Suggested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Suggested-by: Yury Norov <ynorov@caviumnetworks.com>
Suggested-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-08-04 15:06:35 +01:00
Catalin Marinas
6d332747fa arm64: Fix potential race with hardware DBM in ptep_set_access_flags()
In a system with DBM (dirty bit management) capable agents there is a
possible race between a CPU executing ptep_set_access_flags() (maybe
non-DBM capable) and a hardware update of the dirty state (clearing of
PTE_RDONLY). The scenario:

a) the pte is writable (PTE_WRITE set), clean (PTE_RDONLY set) and old
   (PTE_AF clear)
b) ptep_set_access_flags() is called as a result of a read access and it
   needs to set the pte to writable, clean and young (PTE_AF set)
c) a DBM-capable agent, as a result of a different write access, is
   marking the entry as young (setting PTE_AF) and dirty (clearing
   PTE_RDONLY)

The current ptep_set_access_flags() implementation would set the
PTE_RDONLY bit in the resulting value overriding the DBM update and
losing the dirty state.

This patch fixes such race by setting PTE_RDONLY to the most permissive
(lowest value) of the current entry and the new one.

Fixes: 66dbd6e61a ("arm64: Implement ptep_set_access_flags() for hardware AF/DBM")
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Steve Capper <steve.capper@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-08-04 13:26:11 +01:00
Arnd Bergmann
41c454fa0e Drop unused VPIF endpoints from device-tree.
They should be used only when an actual
 remote-endpoint is connected.
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Merge tag 'davinci-fixes-for-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci into fixes

Pull "DaVinci fixes for v4.13" from Sekhar Nori:

Drop unused VPIF endpoints from device-tree.
They should be used only when an actual
remote-endpoint is connected.

* tag 'davinci-fixes-for-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci:
  ARM: dts: da850-lcdk: drop unused VPIF endpoints
  ARM: dts: da850-evm: drop unused VPIF endpoints
2017-08-04 13:22:33 +02:00
Arnd Bergmann
ae119859a1 Allwinner fixes for 4.13
Two fixes to correct the EMAC blocks memory region size to match the
 datasheet. One that converts raw A83T clock indices to macros from the
 clk dt-binding header, completing the A83T sunxi-ng clk driver.
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Merge tag 'sunxi-fixes-for-4.13' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into fixes

Pull "Allwinner fixes for 4.13" from Chen-Yu Tsai:

Two fixes to correct the EMAC blocks memory region size to match the
datasheet. One that converts raw A83T clock indices to macros from the
clk dt-binding header, completing the A83T sunxi-ng clk driver.

* tag 'sunxi-fixes-for-4.13' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
  ARM: dts: sun8i: a83t: Switch to CCU device tree binding macros
  arm64: allwinner: sun50i-a64: Correct emac register size
  ARM: dts: sunxi: h3/h5: Correct emac register size
2017-08-04 13:04:42 +02:00
Arnd Bergmann
3d8db0a889 Qualcomm ARM64 based defconfig Fixes for v4.13-rc2
* Enable missing HWSPINLOCK
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Merge tag 'qcom-arm64-defconfig-fixes-for-4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into fixes

Pull "Qualcomm ARM64 based defconfig Fixes for v4.13-rc2" from Andy Gross:

* Enable missing HWSPINLOCK

* tag 'qcom-arm64-defconfig-fixes-for-4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux:
  arm64: defconfig: enable missing HWSPINLOCK
2017-08-04 13:03:24 +02:00
Marc Gonzalez
985333b0ee ARM: dts: tango4: Request RGMII RX and TX clock delays
RX and TX clock delays are required. Request them explicitly.

Fixes: cad008b8a7 ("ARM: dts: tango4: Initial device trees")
Cc: stable@vger.kernel.org
Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-08-04 12:59:30 +02:00
Masahiro Yamada
2f4233ee13 bus: uniphier-system-bus: set up registers when resuming
When resuming, set up registers that have been lost in the sleep state.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-08-04 12:57:18 +02:00
Arnd Bergmann
264e22afa3 Third Round of Renesas ARM Based SoC Fixes for v4.13
Fix deadlock in regulator quirk for R-Car Gen 2 SoCs
 
 The da9063/da9210 regulator quirk for R-Car Gen2 boards uses a bus
 notifier, and unregisters the notifier when it is no longer needed.
 However, a notifier must not be unregistered from within the call chain.
 
 This bug went unnoticed, as blocking_notifier_chain_unregister() didn't
 take the semaphore during early boot. This is no longer the case as of
 upstream commit 1c3c5eab17 ("sched/core: Enable might_sleep() and
 smp_processor_id() checks early") and a deadlock occurs.
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Merge tag 'renesas-fixes3-for-v4.13' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes

Pull "Third Round of Renesas ARM Based SoC Fixes for v4.13" from Simon Horman:

Fix deadlock in regulator quirk for R-Car Gen 2 SoCs

The da9063/da9210 regulator quirk for R-Car Gen2 boards uses a bus
notifier, and unregisters the notifier when it is no longer needed.
However, a notifier must not be unregistered from within the call chain.

This bug went unnoticed, as blocking_notifier_chain_unregister() didn't
take the semaphore during early boot. This is no longer the case as of
upstream commit 1c3c5eab17 ("sched/core: Enable might_sleep() and
smp_processor_id() checks early") and a deadlock occurs.

* tag 'renesas-fixes3-for-v4.13' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: rcar-gen2: Fix deadlock in regulator quirk
2017-08-04 12:54:41 +02:00
Arnd Bergmann
48cb953e6d mvebu fixes for 4.13 (part 2)
All the fixes are for ARM64 mvebu:
 
  - Fix the RTC interrupt on A7K/A8K which was missed when switching
    from GIC to ICU
  - Mark the A7K/A8K crypto engine as dma coherent
  - Fix the number of GPIO on south bridge on Armada 3700
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Merge tag 'mvebu-fixes-4.13-2' of git://git.infradead.org/linux-mvebu into fixes

Pull "mvebu fixes for 4.13 (part 2)" from Gregory CLEMENT:

All the fixes are for ARM64 mvebu:

 - Fix the RTC interrupt on A7K/A8K which was missed when switching
   from GIC to ICU
 - Mark the A7K/A8K crypto engine as dma coherent
 - Fix the number of GPIO on south bridge on Armada 3700

* tag 'mvebu-fixes-4.13-2' of git://git.infradead.org/linux-mvebu:
  ARM64: dts: marvell: armada-37xx: Fix the number of GPIO on south bridge
  arm64: dts: marvell: mark the cp110 crypto engine as dma coherent
  arm64: dts: marvell: use ICU for the CP110 slave RTC
2017-08-04 12:53:21 +02:00
Arnd Bergmann
b99bba09a5 Amlogic fixes for v4.13-rc
- 2 minor DT fixes
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Merge tag 'amlogic-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic into fixes

Pull "Amlogic fixes for v4.13-rc" from Kevin Hilman:

- 2 minor DT fixes

* tag 'amlogic-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic:
  ARM64: dts: meson-gxl-s905x-libretech-cc: fixup board definition
  ARM64: dts: meson-gx: use specific compatible for the AO pwms
2017-08-04 12:50:52 +02:00
Arnd Bergmann
e86c86bc8e Fix for the recently added mali dt support. The example
showed a wrong value, so fix it before it gets copy-pasted
 to much.
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Merge tag 'v4.13-rockchip-dts32fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into fixes

Pull "Rockchip dts32 fixes for 4.13" from Heiko Stübner:

Fix for the recently added mali dt support. The example
showed a wrong value, so fix it before it gets copy-pasted
to much.

* tag 'v4.13-rockchip-dts32fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  ARM: dts: rockchip: fix mali gpu node on rk3288
  dt-bindings: gpu: drop wrong compatible from midgard binding example
2017-08-04 12:48:46 +02:00
Nicholas Piggin
3db40c312c powerpc/64: Fix __check_irq_replay missing decrementer interrupt
If the decrementer wraps again and de-asserts the decrementer
exception while hard-disabled, __check_irq_replay() has a test to
notice the wrap when interrupts are re-enabled.

The decrementer check must be done when clearing the PACA_IRQ_HARD_DIS
flag, not when the PACA_IRQ_DEC flag is tested. Previously this worked
because the decrementer interrupt was always the first one checked
after clearing the hard disable flag, but HMI check was moved ahead of
that, which introduced this bug.

This can cause a missed decrementer interrupt if we soft-disable
interrupts then take an HMI which is recorded in irq_happened, then
hard-disable interrupts for > 4s to wrap the decrementer.

Fixes: e0e0d6b739 ("powerpc/64: Replay hypervisor maintenance interrupt first")
Cc: stable@vger.kernel.org # v4.9+
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-04 12:55:49 +10:00
Nicholas Piggin
09539f9b12 powerpc/perf: POWER9 PMU stops after idle workaround
POWER9 DD2 PMU can stop after a state-loss idle in some conditions.

A solution is to set then clear MMCRA[60] after wake from state-loss
idle. MMCRA[60] is a non-architected bit, see the user manual for
details.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-08-04 12:52:26 +10:00
Dave Airlie
5669b9989e Merge branch 'drm-fixes-4.13' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
Just a few small fixes for 4.13.

* 'drm-fixes-4.13' of git://people.freedesktop.org/~agd5f/linux:
  drm/amdgpu: Use list_del_init in amdgpu_mn_unregister
  drm/amdgpu: Fix undue fallthroughs in golden registers initialization
  drm/amdgpu: fix header on gfx9 clear state
2017-08-04 11:43:14 +10:00
Linus Torvalds
869c058fbe VFIO fixes for v4.13-rc4
- SPAPR/EEH config build fix (Murilo Opsfelder Araujo)
 
  - Fix possible device lock deadlock (Alex Williamson)
 
  - Correctly size integrated endpoint PCIe capabilities (Alex Williamson)
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Merge tag 'vfio-v4.13-rc4' of git://github.com/awilliam/linux-vfio

Pull VFIO fixes from Alex Williamson:

 - SPAPR/EEH config build fix (Murilo Opsfelder Araujo)

 - Fix possible device lock deadlock (Alex Williamson)

 - Correctly size integrated endpoint PCIe capabilities (Alex
   Williamson)

* tag 'vfio-v4.13-rc4' of git://github.com/awilliam/linux-vfio:
  vfio/pci: Fix handling of RC integrated endpoint PCIe capability size
  vfio/pci: Use pci_try_reset_function() on initial open
  include/linux/vfio.h: Guard powerpc-specific functions with CONFIG_VFIO_SPAPR_EEH
2017-08-03 15:25:14 -07:00
Linus Torvalds
995d03ae26 Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "15 fixes"

[ This does not merge the "fortify: use WARN instead of BUG for now"
  patch, which needs a bit of extra work to build cleanly with all
  configurations. Arnd is on it.   - Linus ]

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  ocfs2: don't clear SGID when inheriting ACLs
  mm: allow page_cache_get_speculative in interrupt context
  userfaultfd: non-cooperative: flush event_wqh at release time
  ipc: add missing container_of()s for randstruct
  cpuset: fix a deadlock due to incomplete patching of cpusets_enabled()
  userfaultfd_zeropage: return -ENOSPC in case mm has gone
  mm: take memory hotplug lock within numa_zonelist_order_handler()
  mm/page_io.c: fix oops during block io poll in swapin path
  zram: do not free pool->size_class
  kthread: fix documentation build warning
  kasan: avoid -Wmaybe-uninitialized warning
  userfaultfd: non-cooperative: notify about unmap of destination during mremap
  mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries
  pid: kill pidhash_size in pidhash_init()
  mm/hugetlb.c: __get_user_pages ignores certain follow_hugetlb_page errors
2017-08-03 14:58:13 -07:00
Linus Torvalds
8d3fe85f07 ACPI fixes for v4.13-rc4
- Fix a device ID of Hisilicon Hip07/08 in the ACPI APD (AMD SoC)
    driver (Hanjun Guo).
 
  - Fix list corruption (introduced during the 4.11 cycle) in the ACPI
    LPSS (Intel SoC) driver (Hans de Goede).
 
  - Fix PCC mailbox handling code crash during initialization when
    PCCT is not present and PCC channel 0 is requested (Hoan Tran).
 
  - Fix a WDAT watchdog initialization issue causing platform device
    creation to fail due to partially overlapping address ranges in
    resources (Ryan Kennedy).
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Merge tag 'acpi-4.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "These fix two issues in the ACPI SoC drivers (Intel LPSS and AMD APD),
  a crash in the PCC mailbox initialization code and a WDAT watchdog
  initialization failure.

  Specifics:

   - Fix a device ID of Hisilicon Hip07/08 in the ACPI APD (AMD SoC)
     driver (Hanjun Guo).

   - Fix list corruption (introduced during the 4.11 cycle) in the ACPI
     LPSS (Intel SoC) driver (Hans de Goede).

   - Fix PCC mailbox handling code crash during initialization when PCCT
     is not present and PCC channel 0 is requested (Hoan Tran).

   - Fix a WDAT watchdog initialization issue causing platform device
     creation to fail due to partially overlapping address ranges in
     resources (Ryan Kennedy)"

* tag 'acpi-4.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: APD: Fix HID for Hisilicon Hip07/08
  mailbox: pcc: Fix crash when request PCC channel 0
  ACPI / watchdog: Fix init failure with overlapping register regions
  ACPI / LPSS: Only call pwm_add_table() for the first PWM controller
2017-08-03 12:37:12 -07:00
Linus Torvalds
73784fb73b Power management fixes for v4.13-rc4
- Fix the handling of the scaling_cur_freq cpufreq policy attribute
    on x86 systems with the MPERF/APERF registers present to make it
    behave more as expected after recent changes (Rafael Wysocki).
 
  - Drop a leftover callback from the intel_pstate driver which also
    prevents the cpuinfo_cur_freq cpufreq policy attribute from being
    incorrectly exposed when intel_pstate works in the active mode
    (Rafael Wysocki).
 
  - Add a missing piece describing the cpuinfo_cur_freq policy
    attribute to cpufreq documentation (Rafael Wysocki).
 
  - Fix up a recently added part of the Thunderbolt driver to avoid
    aborting system suspends if its mailbox commands time out (Rafael
    Wysocki).
 
  - Update device runtime PM framework documentation to reflect the
    current behavior of the code (Johan Hovold).
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Merge tag 'pm-4.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix two cpufreq issues, one introduced recently and one related
  to recent changes, fix cpufreq documentation, fix up recently added
  code in the Thunderbolt driver and update runtime PM framework
  documentation.

  Specifics:

   - Fix the handling of the scaling_cur_freq cpufreq policy attribute
     on x86 systems with the MPERF/APERF registers present to make it
     behave more as expected after recent changes (Rafael Wysocki).

   - Drop a leftover callback from the intel_pstate driver which also
     prevents the cpuinfo_cur_freq cpufreq policy attribute from being
     incorrectly exposed when intel_pstate works in the active mode
     (Rafael Wysocki).

   - Add a missing piece describing the cpuinfo_cur_freq policy
     attribute to cpufreq documentation (Rafael Wysocki).

   - Fix up a recently added part of the Thunderbolt driver to avoid
     aborting system suspends if its mailbox commands time out (Rafael
     Wysocki).

   - Update device runtime PM framework documentation to reflect the
     current behavior of the code (Johan Hovold)"

* tag 'pm-4.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  thunderbolt: icm: Ignore mailbox errors in icm_suspend()
  cpufreq: x86: Make scaling_cur_freq behave more as expected
  PM / runtime: Document new pm_runtime_set_suspended() constraint
  cpufreq: docs: Add missing cpuinfo_cur_freq description
  cpufreq: intel_pstate: Drop ->get from intel_pstate structure
2017-08-03 12:32:49 -07:00
Rafael J. Wysocki
3de559d4df Merge branches 'acpi-soc', 'acpi-wdat' and 'acpi-cppc'
* acpi-soc:
  ACPI: APD: Fix HID for Hisilicon Hip07/08
  ACPI / LPSS: Only call pwm_add_table() for the first PWM controller

* acpi-wdat:
  ACPI / watchdog: Fix init failure with overlapping register regions

* acpi-cppc:
  mailbox: pcc: Fix crash when request PCC channel 0
2017-08-03 20:30:18 +02:00
Rafael J. Wysocki
78aa904a77 Merge branches 'pm-core' and 'pm-misc'
* pm-core:
  PM / runtime: Document new pm_runtime_set_suspended() constraint

* pm-misc:
  thunderbolt: icm: Ignore mailbox errors in icm_suspend()
2017-08-03 20:29:45 +02:00
Rafael J. Wysocki
8a05c3115d Merge branches 'pm-cpufreq-x86', 'pm-cpufreq-docs' and 'intel_pstate'
* pm-cpufreq-x86:
  cpufreq: x86: Make scaling_cur_freq behave more as expected

* pm-cpufreq-docs:
  cpufreq: docs: Add missing cpuinfo_cur_freq description

* intel_pstate:
  cpufreq: intel_pstate: Drop ->get from intel_pstate structure
2017-08-03 20:29:24 +02:00
Radim Krčmář
53a5abd839 KVM/ARM Fixes for v4.13-rc4
- Yet another race with VM destruction plugged
 - A set of small vgic fixes
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Merge tag 'kvm-arm-for-v4.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm

KVM/ARM Fixes for v4.13-rc4

- Yet another race with VM destruction plugged
- A set of small vgic fixes
2017-08-03 17:59:58 +02:00
Christoffer Dall
3af4e414af KVM: arm/arm64: vgic: Use READ_ONCE fo cmpxchg
There is a small chance that the compiler could generate separate loads
for the dist->propbaser which could be modified from another CPU.  As we
want to make sure we atomically update the entire value, and don't race
with other updates, guarantee that the cmpxchg operation compares
against the original value.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2017-08-03 15:47:36 +01:00
Wanpeng Li
6550c4df7e KVM: nVMX: Fix interrupt window request with "Acknowledge interrupt on exit"
------------[ cut here ]------------
 WARNING: CPU: 5 PID: 2288 at arch/x86/kvm/vmx.c:11124 nested_vmx_vmexit+0xd64/0xd70 [kvm_intel]
 CPU: 5 PID: 2288 Comm: qemu-system-x86 Not tainted 4.13.0-rc2+ #7
 RIP: 0010:nested_vmx_vmexit+0xd64/0xd70 [kvm_intel]
Call Trace:
  vmx_check_nested_events+0x131/0x1f0 [kvm_intel]
  ? vmx_check_nested_events+0x131/0x1f0 [kvm_intel]
  kvm_arch_vcpu_ioctl_run+0x5dd/0x1be0 [kvm]
  ? vmx_vcpu_load+0x1be/0x220 [kvm_intel]
  ? kvm_arch_vcpu_load+0x62/0x230 [kvm]
  kvm_vcpu_ioctl+0x340/0x700 [kvm]
  ? kvm_vcpu_ioctl+0x340/0x700 [kvm]
  ? __fget+0xfc/0x210
  do_vfs_ioctl+0xa4/0x6a0
  ? __fget+0x11d/0x210
  SyS_ioctl+0x79/0x90
  do_syscall_64+0x8f/0x750
  ? trace_hardirqs_on_thunk+0x1a/0x1c
  entry_SYSCALL64_slow_path+0x25/0x25

This can be reproduced by booting L1 guest w/ 'noapic' grub parameter, which
means that tells the kernel to not make use of any IOAPICs that may be present
in the system.

Actually external_intr variable in nested_vmx_vmexit() is the req_int_win
variable passed from vcpu_enter_guest() which means that the L0's userspace
requests an irq window. I observed the scenario (!kvm_cpu_has_interrupt(vcpu) &&
L0's userspace reqeusts an irq window) is true, so there is no interrupt which
L1 requires to inject to L2, we should not attempt to emualte "Acknowledge
interrupt on exit" for the irq window requirement in this scenario.

This patch fixes it by not attempt to emulate "Acknowledge interrupt on exit"
if there is no L1 requirement to inject an interrupt to L2.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
[Added code comment to make it obvious that the behavior is not correct.
 We should do a userspace exit with open interrupt window instead of the
 nested VM exit.  This patch still improves the behavior, so it was
 accepted as a (temporary) workaround.]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2017-08-03 15:38:11 +02:00
Shawn Lin
7c84b8b43d mmc: block: bypass the queue even if usage is present for hotplug
The commit 304419d8a7 ("mmc: core: Allocate per-request data using the
block layer core") refactored mechanism of queue handling caused
mmc_init_request() can be called just after mmc_cleanup_queue() caused null
pointer dereference.

Another commit bbdc74dc19 ("mmc: block: Prevent new req entering queue
after its cleanup") tried to fix the problem. However it actually miss one
corner case.

We could still reproduce the issue mentioned with these steps:
(1) insert a SD card and mount it
(2) hotplug it, so it will leave md->usage still be counted
(3) reboot the system which will sync data and umount the card

[Unable to handle kernel NULL pointer dereference at virtual address
00000000
[user pgtable: 4k pages, 48-bit VAs, pgd = ffff80007bab3000
[[0000000000000000] *pgd=000000007a828003, *pud=0000000078dce003,
*pmd=000000007aab6003, *pte=0000000000000000
[Internal error: Oops: 96000007 [#1] PREEMPT SMP
[Modules linked in:
[CPU: 3 PID: 3507 Comm: umount Tainted: G        W
4.13.0-rc1-next-20170720-00012-g9d9bf45 #33
[Hardware name: Firefly-RK3399 Board (DT)
[task: ffff80007a1de200 task.stack: ffff80007a01c000
[PC is at mmc_init_request+0x14/0xc4
[LR is at alloc_request_size+0x4c/0x74
[pc : [<ffff0000087d7150>] lr : [<ffff000008378fe0>] pstate: 600001c5
[sp : ffff80007a01f8f0

....

[[<ffff0000087d7150>] mmc_init_request+0x14/0xc4
[[<ffff000008378fe0>] alloc_request_size+0x4c/0x74
[[<ffff00000817ac28>] mempool_create_node+0xb8/0x17c
[[<ffff00000837aadc>] blk_init_rl+0x9c/0x120
[[<ffff000008396580>] blkg_alloc+0x110/0x234
[[<ffff000008396ac8>] blkg_create+0x424/0x468
[[<ffff00000839877c>] blkg_lookup_create+0xd8/0x14c
[[<ffff0000083796bc>] generic_make_request_checks+0x368/0x3b0
[[<ffff00000837b050>] generic_make_request+0x1c/0x240

So mmc_blk_put wouldn't calling blk_cleanup_queue which actually the
QUEUE_FLAG_DYING and QUEUE_FLAG_BYPASS should stay. Block core expect
blk_queue_bypass_{start, end} internally to bypass/drain the queue before
actually dying the queue, so it didn't expose API to set the queue bypass.
I think we should set QUEUE_FLAG_BYPASS whenever queue is removed, although
the md->usage is still counted, as no dispatch queue could be found then.

Fixes: 304419d8a7 ("mmc: core: Allocate per-request data using the block layer core")
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-08-03 11:00:39 +02:00
Ludovic Desroches
7a1e3f1431 mmc: sdhci-of-at91: force card detect value for non removable devices
When the device is non removable, the card detect signal is often used
for another purpose i.e. muxed to another SoC peripheral or used as a
GPIO. It could lead to wrong behaviors depending the default value of
this signal if not muxed to the SDHCI controller.

Fixes: bb5f8ea4d5 ("mmc: sdhci-of-at91: introduce driver for the Atmel SDMMC")
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-08-03 10:50:55 +02:00
Linus Torvalds
19ec50a438 Two more NFS client bugfixes for 4.13
Stable fix:
 - Fix EXCHANGE_ID corrupt verifier issue
 
 Other fix:
 - Fix double frees in nfs4_test_session_trunk()
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Merge tag 'nfs-for-4.13-4' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull NFS client fixes from Anna Schumaker:
 "Two fixes from Trond this time, now that he's back from his vacation.
  The first is a stable fix for the EXCHANGE_ID issue on the mailing
  list, and the other fixes a double-free situation that he found at the
  same time.

  Stable fix:
   - Fix EXCHANGE_ID corrupt verifier issue

  Other fix:
   - Fix double frees in nfs4_test_session_trunk()"

* tag 'nfs-for-4.13-4' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  NFSv4: Fix double frees in nfs4_test_session_trunk()
  NFSv4: Fix EXCHANGE_ID corrupt verifier issue
2017-08-02 20:56:44 -07:00
Annie Cherkaev
9f5af546e6 isdn/i4l: fix buffer overflow
This fixes a potential buffer overflow in isdn_net.c caused by an
unbounded strcpy.

[ ISDN seems to be effectively unmaintained, and the I4L driver in
  particular is long deprecated, but in case somebody uses this..
    - Linus ]

Signed-off-by: Jiten Thakkar <jitenmt@gmail.com>
Signed-off-by: Annie Cherkaev <annie.cherk@gmail.com>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 20:43:36 -07:00
Tero Kristo
f54d2cd3c1 clk: keystone: sci-clk: Fix sci_clk_get
Currently a bug in the sci_clk_get implementation causes it to always
return a clock belonging to the last device in the static list of clock
data. This is due to a bug in the init code that causes the array
used by sci_clk_get to only be populated with the clocks for the last
device, as each device overwrites the entire array with its own clocks.

Fix this by calculating the actual number of clocks for the SoC, and
allocating the whole array in one go. Also, we don't need the handle
to the init data array anymore after doing this, instead we can
just compare the dev_id / clk_id against the registered clocks and
use binary search for speed.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Reported-by: Dave Gerlach <d-gerlach@ti.com>
Fixes: b745c0794e ("clk: keystone: Add sci-clk driver support")
Cc: Nishanth Menon <nm@ti.com>
Tested-by: Franklin Cooper <fcooper@ti.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2017-08-02 18:37:26 -07:00
Jan Kara
19ec8e4858 ocfs2: don't clear SGID when inheriting ACLs
When new directory 'DIR1' is created in a directory 'DIR0' with SGID bit
set, DIR1 is expected to have SGID bit set (and owning group equal to
the owning group of 'DIR0').  However when 'DIR0' also has some default
ACLs that 'DIR1' inherits, setting these ACLs will result in SGID bit on
'DIR1' to get cleared if user is not member of the owning group.

Fix the problem by moving posix_acl_update_mode() out of ocfs2_set_acl()
into ocfs2_iop_set_acl().  That way the function will not be called when
inheriting ACLs which is what we want as it prevents SGID bit clearing
and the mode has been properly set by posix_acl_create() anyway.  Also
posix_acl_chmod() that is calling ocfs2_set_acl() takes care of updating
mode itself.

Fixes: 073931017b ("posix_acl: Clear SGID bit when setting file permissions")
Link: http://lkml.kernel.org/r/20170801141252.19675-3-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Mark Fasheh <mfasheh@versity.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 17:16:13 -07:00
Kan Liang
1ee1c3f5b5 mm: allow page_cache_get_speculative in interrupt context
Kernel panic when calling the IRQ-safe __get_user_pages_fast in NMI
handler.

The bug was introduced by commit 2947ba054a ("x86/mm/gup: Switch GUP
to the generic get_user_page_fast() implementation").

The original x86 __get_user_page_fast used plain get_page() or
page_ref_add().  However, the generic __get_user_page_fast uses
page_cache_get_speculative(), which has VM_BUG_ON(in_interrupt()).

There is no reason to prevent page_cache_get_speculative from using in
interrupt context.  According to the author, putting a BUG_ON there is
just because the code is not verifying correctness of interrupt races.
I did some tests in interrupt context.  There is no issue found.

Removing VM_BUG_ON(in_interrupt()) for page_cache_get_speculative().

Link: http://lkml.kernel.org/r/1501609146-59730-1-git-send-email-kan.liang@intel.com
Fixes: 2947ba054a ("x86/mm/gup: Switch GUP to the generic get_user_page_fast() implementation")
Signed-off-by: Kan Liang <kan.liang@intel.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ying Huang <ying.huang@intel.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 17:16:13 -07:00
Mike Rapoport
5a18b64e3f userfaultfd: non-cooperative: flush event_wqh at release time
There may still be threads waiting on event_wqh at the time the
userfault file descriptor is closed.  Flush the events wait-queue to
prevent waiting threads from hanging.

Link: http://lkml.kernel.org/r/1501398127-30419-1-git-send-email-rppt@linux.vnet.ibm.com
Fixes: 9cd75c3cd4 ("userfaultfd: non-cooperative: add ability to report
non-PF events from uffd descriptor")
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 17:16:13 -07:00
Kees Cook
ade9f91b32 ipc: add missing container_of()s for randstruct
When building with the randstruct gcc plugin, the layout of the IPC
structs will be randomized, which requires any sub-structure accesses to
use container_of().  The proc display handlers were missing the needed
container_of()s since the iterator is passing in the top-level struct
kern_ipc_perm.

This would lead to crashes when running the "lsipc" program after the
system had IPC registered (e.g. after starting up Gnome):

  general protection fault: 0000 [#1] PREEMPT SMP
  ...
  RIP: 0010:shm_add_rss_swap.isra.1+0x13/0xa0
  ...
  Call Trace:
    sysvipc_shm_proc_show+0x5e/0x150
    sysvipc_proc_show+0x1a/0x30
    seq_read+0x2e9/0x3f0
  ...

Link: http://lkml.kernel.org/r/20170730205950.GA55841@beast
Fixes: 3859a271a0 ("randstruct: Mark various structs for randomization")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Dominik Brodowski <linux@dominikbrodowski.net>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 17:16:12 -07:00
Dima Zavin
89affbf5d9 cpuset: fix a deadlock due to incomplete patching of cpusets_enabled()
In codepaths that use the begin/retry interface for reading
mems_allowed_seq with irqs disabled, there exists a race condition that
stalls the patch process after only modifying a subset of the
static_branch call sites.

This problem manifested itself as a deadlock in the slub allocator,
inside get_any_partial.  The loop reads mems_allowed_seq value (via
read_mems_allowed_begin), performs the defrag operation, and then
verifies the consistency of mem_allowed via the read_mems_allowed_retry
and the cookie returned by xxx_begin.

The issue here is that both begin and retry first check if cpusets are
enabled via cpusets_enabled() static branch.  This branch can be
rewritted dynamically (via cpuset_inc) if a new cpuset is created.  The
x86 jump label code fully synchronizes across all CPUs for every entry
it rewrites.  If it rewrites only one of the callsites (specifically the
one in read_mems_allowed_retry) and then waits for the
smp_call_function(do_sync_core) to complete while a CPU is inside the
begin/retry section with IRQs off and the mems_allowed value is changed,
we can hang.

This is because begin() will always return 0 (since it wasn't patched
yet) while retry() will test the 0 against the actual value of the seq
counter.

The fix is to use two different static keys: one for begin
(pre_enable_key) and one for retry (enable_key).  In cpuset_inc(), we
first bump the pre_enable key to ensure that cpuset_mems_allowed_begin()
always return a valid seqcount if are enabling cpusets.  Similarly, when
disabling cpusets via cpuset_dec(), we first ensure that callers of
cpuset_mems_allowed_retry() will start ignoring the seqcount value
before we let cpuset_mems_allowed_begin() return 0.

The relevant stack traces of the two stuck threads:

  CPU: 1 PID: 1415 Comm: mkdir Tainted: G L  4.9.36-00104-g540c51286237 #4
  Hardware name: Default string Default string/Hardware, BIOS 4.29.1-20170526215256 05/26/2017
  task: ffff8817f9c28000 task.stack: ffffc9000ffa4000
  RIP: smp_call_function_many+0x1f9/0x260
  Call Trace:
    smp_call_function+0x3b/0x70
    on_each_cpu+0x2f/0x90
    text_poke_bp+0x87/0xd0
    arch_jump_label_transform+0x93/0x100
    __jump_label_update+0x77/0x90
    jump_label_update+0xaa/0xc0
    static_key_slow_inc+0x9e/0xb0
    cpuset_css_online+0x70/0x2e0
    online_css+0x2c/0xa0
    cgroup_apply_control_enable+0x27f/0x3d0
    cgroup_mkdir+0x2b7/0x420
    kernfs_iop_mkdir+0x5a/0x80
    vfs_mkdir+0xf6/0x1a0
    SyS_mkdir+0xb7/0xe0
    entry_SYSCALL_64_fastpath+0x18/0xad

  ...

  CPU: 2 PID: 1 Comm: init Tainted: G L  4.9.36-00104-g540c51286237 #4
  Hardware name: Default string Default string/Hardware, BIOS 4.29.1-20170526215256 05/26/2017
  task: ffff8818087c0000 task.stack: ffffc90000030000
  RIP: int3+0x39/0x70
  Call Trace:
    <#DB> ? ___slab_alloc+0x28b/0x5a0
    <EOE> ? copy_process.part.40+0xf7/0x1de0
    __slab_alloc.isra.80+0x54/0x90
    copy_process.part.40+0xf7/0x1de0
    copy_process.part.40+0xf7/0x1de0
    kmem_cache_alloc_node+0x8a/0x280
    copy_process.part.40+0xf7/0x1de0
    _do_fork+0xe7/0x6c0
    _raw_spin_unlock_irq+0x2d/0x60
    trace_hardirqs_on_caller+0x136/0x1d0
    entry_SYSCALL_64_fastpath+0x5/0xad
    do_syscall_64+0x27/0x350
    SyS_clone+0x19/0x20
    do_syscall_64+0x60/0x350
    entry_SYSCALL64_slow_path+0x25/0x25

Link: http://lkml.kernel.org/r/20170731040113.14197-1-dmitriyz@waymo.com
Fixes: 46e700abc4 ("mm, page_alloc: remove unnecessary taking of a seqlock when cpusets are disabled")
Signed-off-by: Dima Zavin <dmitriyz@waymo.com>
Reported-by: Cliff Spradlin <cspradlin@waymo.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christopher Lameter <cl@linux.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 17:16:12 -07:00
Mike Rapoport
9d95aa4bad userfaultfd_zeropage: return -ENOSPC in case mm has gone
In the non-cooperative userfaultfd case, the process exit may race with
outstanding mcopy_atomic called by the uffd monitor.  Returning -ENOSPC
instead of -EINVAL when mm is already gone will allow uffd monitor to
distinguish this case from other error conditions.

Unfortunately I overlooked userfaultfd_zeropage when updating
userfaultd_copy().

Link: http://lkml.kernel.org/r/1501136819-21857-1-git-send-email-rppt@linux.vnet.ibm.com
Fixes: 96333187ab ("userfaultfd_copy: return -ENOSPC in case mm has gone")
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 17:16:12 -07:00
Heiko Carstens
167d0f258f mm: take memory hotplug lock within numa_zonelist_order_handler()
Andre Wild reported the following warning:

  WARNING: CPU: 2 PID: 1205 at kernel/cpu.c:240 lockdep_assert_cpus_held+0x4c/0x60
  Modules linked in:
  CPU: 2 PID: 1205 Comm: bash Not tainted 4.13.0-rc2-00022-gfd2b2c57ec20 #10
  Hardware name: IBM 2964 N96 702 (z/VM 6.4.0)
  task: 00000000701d8100 task.stack: 0000000073594000
  Krnl PSW : 0704f00180000000 0000000000145e24 (lockdep_assert_cpus_held+0x4c/0x60)
  ...
  Call Trace:
   lockdep_assert_cpus_held+0x42/0x60)
   stop_machine_cpuslocked+0x62/0xf0
   build_all_zonelists+0x92/0x150
   numa_zonelist_order_handler+0x102/0x150
   proc_sys_call_handler.isra.12+0xda/0x118
   proc_sys_write+0x34/0x48
   __vfs_write+0x3c/0x178
   vfs_write+0xbc/0x1a0
   SyS_write+0x66/0xc0
   system_call+0xc4/0x2b0
   locks held by bash/1205:
   #0:  (sb_writers#4){.+.+.+}, at: vfs_write+0xa6/0x1a0
   #1:  (zl_order_mutex){+.+...}, at: numa_zonelist_order_handler+0x44/0x150
   #2:  (zonelists_mutex){+.+...}, at: numa_zonelist_order_handler+0xf4/0x150
  Last Breaking-Event-Address:
    lockdep_assert_cpus_held+0x48/0x60

This can be easily triggered with e.g.

    echo n > /proc/sys/vm/numa_zonelist_order

In commit 3f906ba236 ("mm/memory-hotplug: switch locking to a percpu
rwsem") memory hotplug locking was changed to fix a potential deadlock.

This also switched the stop_machine() invocation within
build_all_zonelists() to stop_machine_cpuslocked() which now expects
that online cpus are locked when being called.

This assumption is not true if build_all_zonelists() is being called
from numa_zonelist_order_handler().

In order to fix this simply add a mem_hotplug_begin()/mem_hotplug_done()
pair to numa_zonelist_order_handler().

Link: http://lkml.kernel.org/r/20170726111738.38768-1-heiko.carstens@de.ibm.com
Fixes: 3f906ba236 ("mm/memory-hotplug: switch locking to a percpu rwsem")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reported-by: Andre Wild <wild@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 17:16:11 -07:00
Tetsuo Handa
b0ba2d0faf mm/page_io.c: fix oops during block io poll in swapin path
When a thread is OOM-killed during swap_readpage() operation, an oops
occurs because end_swap_bio_read() is calling wake_up_process() based on
an assumption that the thread which called swap_readpage() is still
alive.

  Out of memory: Kill process 525 (polkitd) score 0 or sacrifice child
  Killed process 525 (polkitd) total-vm:528128kB, anon-rss:0kB, file-rss:4kB, shmem-rss:0kB
  oom_reaper: reaped process 525 (polkitd), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
  general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
  Modules linked in: nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ipt_REJECT nf_reject_ipv4 ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter coretemp ppdev pcspkr vmw_balloon sg shpchp vmw_vmci parport_pc parport i2c_piix4 ip_tables xfs libcrc32c sd_mod sr_mod cdrom ata_generic pata_acpi vmwgfx ahci libahci drm_kms_helper ata_piix syscopyarea sysfillrect sysimgblt fb_sys_fops mptspi scsi_transport_spi ttm e1000 mptscsih drm mptbase i2c_core libata serio_raw
  CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.13.0-rc2-next-20170725 #129
  Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/31/2013
  task: ffffffffb7c16500 task.stack: ffffffffb7c00000
  RIP: 0010:__lock_acquire+0x151/0x12f0
  Call Trace:
   <IRQ>
   lock_acquire+0x59/0x80
   _raw_spin_lock_irqsave+0x3b/0x4f
   try_to_wake_up+0x3b/0x410
   wake_up_process+0x10/0x20
   end_swap_bio_read+0x6f/0xf0
   bio_endio+0x92/0xb0
   blk_update_request+0x88/0x270
   scsi_end_request+0x32/0x1c0
   scsi_io_completion+0x209/0x680
   scsi_finish_command+0xd4/0x120
   scsi_softirq_done+0x120/0x140
   __blk_mq_complete_request_remote+0xe/0x10
   flush_smp_call_function_queue+0x51/0x120
   generic_smp_call_function_single_interrupt+0xe/0x20
   smp_trace_call_function_single_interrupt+0x22/0x30
   smp_call_function_single_interrupt+0x9/0x10
   call_function_single_interrupt+0xa7/0xb0
   </IRQ>
  RIP: 0010:native_safe_halt+0x6/0x10
   default_idle+0xe/0x20
   arch_cpu_idle+0xa/0x10
   default_idle_call+0x1e/0x30
   do_idle+0x187/0x200
   cpu_startup_entry+0x6e/0x70
   rest_init+0xd0/0xe0
   start_kernel+0x456/0x477
   x86_64_start_reservations+0x24/0x26
   x86_64_start_kernel+0xf7/0x11a
   secondary_startup_64+0xa5/0xa5
  Code: c3 49 81 3f 20 9e 0b b8 41 bc 00 00 00 00 44 0f 45 e2 83 fe 01 0f 87 62 ff ff ff 89 f0 49 8b 44 c7 08 48 85 c0 0f 84 52 ff ff ff <f0> ff 80 98 01 00 00 8b 3d 5a 49 c4 01 45 8b b3 18 0c 00 00 85
  RIP: __lock_acquire+0x151/0x12f0 RSP: ffffa01f39e03c50
  ---[ end trace 6c441db499169b1e ]---
  Kernel panic - not syncing: Fatal exception in interrupt
  Kernel Offset: 0x36000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
  ---[ end Kernel panic - not syncing: Fatal exception in interrupt

Fix it by holding a reference to the thread.

[akpm@linux-foundation.org: add comment]
Fixes: 23955622ff ("swap: add block io poll in swapin path")
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Shaohua Li <shli@fb.com>
Cc: Tim Chen <tim.c.chen@intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 17:16:11 -07:00
Minchan Kim
3189c82056 zram: do not free pool->size_class
Mike reported kernel goes oops with ltp:zram03 testcase.

  zram: Added device: zram0
  zram0: detected capacity change from 0 to 107374182400
  BUG: unable to handle kernel paging request at 0000306d61727a77
  IP: zs_map_object+0xb9/0x260
  PGD 0
  P4D 0
  Oops: 0000 [#1] SMP
  Dumping ftrace buffer:
     (ftrace buffer empty)
  Modules linked in: zram(E) xfs(E) libcrc32c(E) btrfs(E) xor(E) raid6_pq(E) loop(E) ebtable_filter(E) ebtables(E) ip6table_filter(E) ip6_tables(E) iptable_filter(E) ip_tables(E) x_tables(E) af_packet(E) br_netfilter(E) bridge(E) stp(E) llc(E) iscsi_ibft(E) iscsi_boot_sysfs(E) nls_iso8859_1(E) nls_cp437(E) vfat(E) fat(E) intel_powerclamp(E) coretemp(E) cdc_ether(E) kvm_intel(E) usbnet(E) mii(E) kvm(E) irqbypass(E) crct10dif_pclmul(E) crc32_pclmul(E) crc32c_intel(E) iTCO_wdt(E) ghash_clmulni_intel(E) bnx2(E) iTCO_vendor_support(E) pcbc(E) ioatdma(E) ipmi_ssif(E) aesni_intel(E) i5500_temp(E) i2c_i801(E) aes_x86_64(E) lpc_ich(E) shpchp(E) mfd_core(E) crypto_simd(E) i7core_edac(E) dca(E) glue_helper(E) cryptd(E) ipmi_si(E) button(E) acpi_cpufreq(E) ipmi_devintf(E) pcspkr(E) ipmi_msghandler(E)
   nfsd(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E) sunrpc(E) ext4(E) crc16(E) mbcache(E) jbd2(E) sd_mod(E) ata_generic(E) i2c_algo_bit(E) ata_piix(E) drm_kms_helper(E) ahci(E) syscopyarea(E) sysfillrect(E) libahci(E) sysimgblt(E) fb_sys_fops(E) uhci_hcd(E) ehci_pci(E) ttm(E) ehci_hcd(E) libata(E) drm(E) megaraid_sas(E) usbcore(E) sg(E) dm_multipath(E) dm_mod(E) scsi_dh_rdac(E) scsi_dh_emc(E) scsi_dh_alua(E) scsi_mod(E) efivarfs(E) autofs4(E) [last unloaded: zram]
  CPU: 6 PID: 12356 Comm: swapon Tainted: G            E   4.13.0.g87b2c3f-default #194
  Hardware name: IBM System x3550 M3 -[7944K3G]-/69Y5698     , BIOS -[D6E150AUS-1.10]- 12/15/2010
  task: ffff880158d2c4c0 task.stack: ffffc90001680000
  RIP: 0010:zs_map_object+0xb9/0x260
  Call Trace:
   zram_bvec_rw.isra.26+0xe8/0x780 [zram]
   zram_rw_page+0x6e/0xa0 [zram]
   bdev_read_page+0x81/0xb0
   do_mpage_readpage+0x51a/0x710
   mpage_readpages+0x122/0x1a0
   blkdev_readpages+0x1d/0x20
   __do_page_cache_readahead+0x1b2/0x270
   ondemand_readahead+0x180/0x2c0
   page_cache_sync_readahead+0x31/0x50
   generic_file_read_iter+0x7e7/0xaf0
   blkdev_read_iter+0x37/0x40
   __vfs_read+0xce/0x140
   vfs_read+0x9e/0x150
   SyS_read+0x46/0xa0
   entry_SYSCALL_64_fastpath+0x1a/0xa5
  Code: 81 e6 00 c0 3f 00 81 fe 00 00 16 00 0f 85 9f 01 00 00 0f b7 13 65 ff 05 5e 07 dc 7e 66 c1 ea 02 81 e2 ff 01 00 00 49 8b 54 d4 08 <8b> 4a 48 41 0f af ce 81 e1 ff 0f 00 00 41 89 c9 48 c7 c3 a0 70
  RIP: zs_map_object+0xb9/0x260 RSP: ffffc90001683988
  CR2: 0000306d61727a77

He bisected the problem is [1].

After commit cf8e0fedf0 ("mm/zsmalloc: simplify zs_max_alloc_size
handling"), zram doesn't use double pointer for pool->size_class any
more in zs_create_pool so counter function zs_destroy_pool don't need to
free it, either.

Otherwise, it does kfree wrong address and then, kernel goes Oops.

Link: http://lkml.kernel.org/r/20170725062650.GA12134@bbox
Fixes: cf8e0fedf0 ("mm/zsmalloc: simplify zs_max_alloc_size handling")
Signed-off-by: Minchan Kim <minchan@kernel.org>
Reported-by: Mike Galbraith <efault@gmx.de>
Tested-by: Mike Galbraith <efault@gmx.de>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 16:34:47 -07:00
Jonathan Corbet
d16977f3a6 kthread: fix documentation build warning
The kerneldoc comment for kthread_create() had an incorrect argument
name, leading to a warning in the docs build.

Correct it, and make one more small step toward a warning-free build.

Link: http://lkml.kernel.org/r/20170724135916.7f486c6f@lwn.net
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 16:34:47 -07:00