sfrench/cifs-2.6.git
5 years agoMerge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 8 Jul 2018 20:56:25 +0000 (13:56 -0700)]
Merge branch 'x86-pti-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86/pti updates from Thomas Gleixner:
 "Two small fixes correcting the handling of SSB mitigations on AMD
  processors"

* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/bugs: Fix the AMD SSBD usage of the SPEC_CTRL MSR
  x86/bugs: Update when to check for the LS_CFG SSBD mitigation

5 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 8 Jul 2018 20:26:55 +0000 (13:26 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Thomas Gleixner:

 - Prevent an out-of-bounds access in mtrr_write()

 - Break a circular dependency in the new hyperv IPI acceleration code

 - Address the build breakage related to inline functions by enforcing
   gnu_inline and explicitly bringing native_save_fl() out of line,
   which also adds a set of _ARM_ARG macros which provide 32/64bit
   safety.

 - Initialize the shadow CR4 per cpu variable before using it.

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mtrr: Don't copy out-of-bounds data in mtrr_write
  x86/hyper-v: Fix the circular dependency in IPI enlightenment
  x86/paravirt: Make native_save_fl() extern inline
  x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h>
  compiler-gcc.h: Add __attribute__((gnu_inline)) to all inline declarations
  x86/mm/32: Initialize the CR4 shadow before __flush_tlb_all()

5 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 8 Jul 2018 19:41:23 +0000 (12:41 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Thomas Gleixner:

 - The hopefully final fix for the reported race problems in
   kthread_parkme(). The previous attempt still left a hole and was
   partially wrong.

 - Plug a race in the remote tick mechanism which triggers a warning
   about updates not being done correctly. That's a false positive if
   the race condition is hit as the remote CPU is idle. Plug it by
   checking the condition again when holding run queue lock.

 - Fix a bug in the utilization estimation of a run queue which causes
   the estimation to be 0 when a run queue is throttled.

 - Advance the global expiration of the period timer when the timer is
   restarted after a idle period. Otherwise the expiry time is stale and
   the timer fires prematurely.

 - Cure the drift between the bandwidth timer and the runqueue
   accounting, which leads to bogus throttling of runqueues

 - Place the call to cpufreq_update_util() correctly so the function
   will observe the correct number of running RT tasks and not a stale
   one.

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kthread, sched/core: Fix kthread_parkme() (again...)
  sched/util_est: Fix util_est_dequeue() for throttled cfs_rq
  sched/fair: Advance global expiration when period timer is restarted
  sched/fair: Fix bandwidth timer clock drift condition
  sched/rt: Fix call to cpufreq_update_util()
  sched/nohz: Skip remote tick on idle task entirely

5 years agoMerge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 8 Jul 2018 18:57:40 +0000 (11:57 -0700)]
Merge branch 'core-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull objtool fix from Thomas Gleixner:
 "A single fix for objtool to address a bug in handling the cold
  subfunction detection for aliased functions which was added recently.
  The bug causes objtool to enter an infinite loop"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Support GCC 8 '-fnoreorder-functions'

5 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Sun, 8 Jul 2018 18:29:14 +0000 (11:29 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:

 - add missing RETs in x86 aegis/morus

 - fix build error in arm speck

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: x86 - Add missing RETs
  crypto: arm/speck - fix building in Thumb2 mode

5 years agoMerge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 8 Jul 2018 18:10:30 +0000 (11:10 -0700)]
Merge tag 'ext4_for_linus_stable' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 bugfixes from Ted Ts'o:
 "Bug fixes for ext4; most of which relate to vulnerabilities where a
  maliciously crafted file system image can result in a kernel OOPS or
  hang.

  At least one fix addresses an inline data bug could be triggered by
  userspace without the need of a crafted file system (although it does
  require that the inline data feature be enabled)"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: check superblock mapped prior to committing
  ext4: add more mount time checks of the superblock
  ext4: add more inode number paranoia checks
  ext4: avoid running out of journal credits when appending to an inline file
  jbd2: don't mark block as modified if the handle is out of credits
  ext4: never move the system.data xattr out of the inode body
  ext4: clear i_data in ext4_inode_info when removing inline data
  ext4: include the illegal physical block in the bad map ext4_error msg
  ext4: verify the depth of extent tree in ext4_find_extent()
  ext4: only look at the bg_flags field if it is valid
  ext4: make sure bitmaps and the inode table don't overlap with bg descriptors
  ext4: always check block group bounds in ext4_init_block_bitmap()
  ext4: always verify the magic number in xattr blocks
  ext4: add corruption check in ext4_xattr_set_entry()
  ext4: add warn_on_error mount option

5 years agoMerge tag 'pci-v4.18-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
Linus Torvalds [Sun, 8 Jul 2018 17:55:21 +0000 (10:55 -0700)]
Merge tag 'pci-v4.18-fixes-2' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - Fix a use-after-free in the endpoint code (Dan Carpenter)

 - Stop defaulting CONFIG_PCIE_DW_PLAT_HOST to yes (Geert Uytterhoeven)

 - Fix an nfp regression caused by a change in how we limit the number
   of VFs we can enable (Jakub Kicinski)

 - Fix failure path cleanup issues in the new R-Car gen3 PHY support
   (Marek Vasut)

 - Fix leaks of OF nodes in faraday, xilinx-nwl, xilinx (Nicholas Mc
   Guire)

* tag 'pci-v4.18-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  nfp: stop limiting VFs to 0
  PCI/IOV: Reset total_VFs limit after detaching PF driver
  PCI: faraday: Add missing of_node_put()
  PCI: xilinx-nwl: Add missing of_node_put()
  PCI: xilinx: Add missing of_node_put()
  PCI: endpoint: Use after free in pci_epf_unregister_driver()
  PCI: controller: dwc: Do not let PCIE_DW_PLAT_HOST default to yes
  PCI: rcar: Clean up PHY init on failure
  PCI: rcar: Shut the PHY down in failpath

5 years agoMerge tag '4.18-rc3-smb3fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sun, 8 Jul 2018 01:31:34 +0000 (18:31 -0700)]
Merge tag '4.18-rc3-smb3fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Five smb3/cifs fixes for stable (including for some leaks and memory
  overwrites) and also a few fixes for recent regressions in packet
  signing.

  Additional testing at the recent SMB3 test event, and some good work
  by Paulo and others spotted the issues fixed here. In addition to my
  xfstest runs on these, Aurelien and Stefano did additional test runs
  to verify this set"

* tag '4.18-rc3-smb3fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: Fix stack out-of-bounds in smb{2,3}_create_lease_buf()
  cifs: Fix infinite loop when using hard mount option
  cifs: Fix slab-out-of-bounds in send_set_info() on SMB2 ACE setting
  cifs: Fix memory leak in smb2_set_ea()
  cifs: fix SMB1 breakage
  cifs: Fix validation of signed data in smb2
  cifs: Fix validation of signed data in smb3+
  cifs: Fix use after free of a mid_q_entry

5 years agoMerge tag 'dma-mapping-4.18-3' of git://git.infradead.org/users/hch/dma-mapping
Linus Torvalds [Sun, 8 Jul 2018 00:55:16 +0000 (17:55 -0700)]
Merge tag 'dma-mapping-4.18-3' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fix from Christoph Hellwig:
 "Revert an incorrect dma-mapping commit for 4.18-rc"

* tag 'dma-mapping-4.18-3' of git://git.infradead.org/users/hch/dma-mapping:
  Revert "iommu/intel-iommu: Enable CONFIG_DMA_DIRECT_OPS=y and clean up intel_{alloc,free}_coherent()"

5 years agoMerge tag 'dmaengine-fix-4.18-rc4' of git://git.infradead.org/users/vkoul/slave-dma
Linus Torvalds [Sun, 8 Jul 2018 00:29:08 +0000 (17:29 -0700)]
Merge tag 'dmaengine-fix-4.18-rc4' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "We have few odd driver fixes and one email update change for you this
  time:

   - Driver fixes for k3dma (off by one), pl330 (burst residue
     granularity) and omap-dma (incorrect residue_granularity)

   - Sinan's email update"

* tag 'dmaengine-fix-4.18-rc4' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: k3dma: Off by one in k3_of_dma_simple_xlate()
  dmaengine: pl330: report BURST residue granularity
  MAINTAINERS: Update email-id of Sinan Kaya
  dmaengine: ti: omap-dma: Fix OMAP1510 incorrect residue_granularity

5 years agoMerge tag 'for-linus-4.18-2' of git://github.com/cminyard/linux-ipmi
Linus Torvalds [Sun, 8 Jul 2018 00:15:38 +0000 (17:15 -0700)]
Merge tag 'for-linus-4.18-2' of git://github.com/cminyard/linux-ipmi

Pull IPMI fixes from Corey Minyard:
 "A couple of small fixes: one to the BMC side of things that fixes an
  interrupt issue, and one oops fix if init fails in a certain way on
  the client driver"

* tag 'for-linus-4.18-2' of git://github.com/cminyard/linux-ipmi:
  ipmi: kcs_bmc: fix IRQ exception if the channel is not open
  ipmi: Cleanup oops on initialization failure

5 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Sat, 7 Jul 2018 17:51:25 +0000 (10:51 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 LDFLAGS clean-up from Catalin Marinas:

 - use aarch64elf instead of aarch64linux

 - move endianness options to LDFLAGS instead from LD

 - remove no-op '-p' linker flag

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: remove no-op -p linker flag
  arm64: add endianness option to LDFLAGS instead of LD
  arm64: Use aarch64elf and aarch64elfb emulation mode variants

5 years agox86/mtrr: Don't copy out-of-bounds data in mtrr_write
Jann Horn [Fri, 6 Jul 2018 21:50:03 +0000 (23:50 +0200)]
x86/mtrr: Don't copy out-of-bounds data in mtrr_write

Don't access the provided buffer out of bounds - this can cause a kernel
out-of-bounds read when invoked through sys_splice() or other things that
use kernel_write()/__kernel_write().

Fixes: 7f8ec5a4f01a ("x86/mtrr: Convert to use strncpy_from_user() helper")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180706215003.156702-1-jannh@google.com
5 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 7 Jul 2018 02:45:47 +0000 (19:45 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is two minor bug fixes (aacraid, target) and a fix for a
  potential exploit in the way sg handles teardown"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: sg: mitigate read/write abuse
  scsi: aacraid: Fix PD performance regression over incorrect qd being set
  scsi: target: Fix truncated PR-in ReadKeys response

5 years agoMerge tag 'for-linus-20180706' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 7 Jul 2018 02:13:42 +0000 (19:13 -0700)]
Merge tag 'for-linus-20180706' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Two minor fixes for this series:

   - add LOOP_SET_BLOCK_SIZE as compat ioctl (Evan Green)

   - drbd use-after-free fix (Lars Ellenberg)"

* tag 'for-linus-20180706' of git://git.kernel.dk/linux-block:
  loop: Add LOOP_SET_BLOCK_SIZE in compat ioctl
  drbd: fix access after free

5 years agoMerge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 6 Jul 2018 19:32:17 +0000 (12:32 -0700)]
Merge tag 'clk-fixes-for-linus' of git://git./linux/kernel/git/clk/linux

Pull clk fixes from Stephen Boyd:
 "The usual collection of driver fixlets:

   - build cleanup/fix for the sunxi makefile that tried to save size
     but failed and prevented dead code elimination from working

   - two Davinci clk driver fixes for a typo causing build failures in
     different configurations and an error check that checks the wrong
     variable.

   - undo the DT ABI breaking imx6ul binding header shuffle that got
     merged this cycle"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  dt-bindings: clock: imx6ul: Do not change the clock definition order
  clk: davinci: fix a typo (which leads to build failures)
  clk: davinci: cfgchip: testing the wrong variable
  clk: sunxi-ng: replace lib-y with obj-y

5 years agoMerge tag 'vfio-v4.18-rc4' of git://github.com/awilliam/linux-vfio
Linus Torvalds [Fri, 6 Jul 2018 19:23:53 +0000 (12:23 -0700)]
Merge tag 'vfio-v4.18-rc4' of git://github.com/awilliam/linux-vfio

Pull VFIO fixes from Alex Williamson:

 - Make vfio-pci IGD extensions optional via Kconfig (Alex Williamson)

 - Remove unused and soon to be removed map_atomic callback from mbochs
   sample driver, add unmap callback to avoid dmabuf leaks (Gerd
   Hoffmann)

 - Fix usage of get_user_pages_longterm() (Jason Gunthorpe)

 - Fix sample mbochs driver vm_operations_struct.fault return type
   (Souptick Joarder)

* tag 'vfio-v4.18-rc4' of git://github.com/awilliam/linux-vfio:
  sample/vfio-mdev: Change return type to vm_fault_t
  vfio: Use get_user_pages_longterm correctly
  sample/mdev/mbochs: add mbochs_kunmap_dmabuf
  sample/mdev/mbochs: remove mbochs_kmap_atomic_dmabuf
  vfio/pci: Make IGD support a configurable option

5 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Fri, 6 Jul 2018 16:14:34 +0000 (09:14 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "A few more changes for v4.18:

   - wire up the two new system calls io_pgetevents and rseq

   - fix a register corruption in the expolines code for machines
     without EXRL

   - drastically reduce the memory utilization of the dasd driver

   - fix reference counting for KVM page table pages"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: wire up rseq system call
  s390: wire up io_pgetevents system call
  s390/mm: fix refcount usage for 4K pgste
  s390/dasd: reduce the default queue depth and nr of hardware queues
  s390: Correct register corruption in critical section cleanup

5 years agox86/hyper-v: Fix the circular dependency in IPI enlightenment
K. Y. Srinivasan [Tue, 3 Jul 2018 23:01:55 +0000 (16:01 -0700)]
x86/hyper-v: Fix the circular dependency in IPI enlightenment

The IPI hypercalls depend on being able to map the Linux notion of CPU ID
to the hypervisor's notion of the CPU ID. The array hv_vp_index[] provides
this mapping. Code for populating this array depends on the IPI functionality.
Break this circular dependency.

[ tglx: Use a proper define instead of '-1' with a u32 variable as pointed
   out by Vitaly ]

Fixes: 68bb7bfb7985 ("X86/Hyper-V: Enable IPI enlightenments")
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Cc: gregkh@linuxfoundation.org
Cc: devel@linuxdriverproject.org
Cc: olaf@aepfle.de
Cc: apw@canonical.com
Cc: jasowang@redhat.com
Cc: hpa@zytor.com
Cc: sthemmin@microsoft.com
Cc: Michael.H.Kelley@microsoft.com
Cc: vkuznets@redhat.com
Link: https://lkml.kernel.org/r/20180703230155.15160-1-kys@linuxonhyperv.com
5 years agoMerge tag 'drm-fixes-2018-07-06' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 6 Jul 2018 02:43:29 +0000 (19:43 -0700)]
Merge tag 'drm-fixes-2018-07-06' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "This is the drm fixes for rc4.

  It's a bit larger than I'd like but the exynos cleanups are pretty
  mechanical, and I'd rather have them in sooner rather than later so we
  can avoid too much conflicts around them. The non-mechanincal exynos
  changes are mostly fixes for new feature recently introduced.

  Apart from the exynos updates, we have:

  i915:
   - GVT and GGTT mapping fixes

  amdgpu:
   - fix HDMI2.0 4K@60 Hz regression
   - Hotplug fixes for dual-GPU laptops to make power management better
   - misc vega12 bios fixes, a race fix and some typos.

  sii8620 bridge:
   - small fixes around mode setting

  core:
   - use kvzalloc to allocate blob property memory"

* tag 'drm-fixes-2018-07-06' of git://anongit.freedesktop.org/drm/drm: (34 commits)
  drm/amd/display: add a check for display depth validity
  drm/amd/display: adding ycbcr420 pixel encoding for hdmi
  drm/udl: fix display corruption of the last line
  drm/bridge/sii8620: Fix link mode selection
  drm/bridge/sii8620: Fix display of packed pixel modes
  drm/bridge/sii8620: Send AVI infoframe in all MHL versions
  drm/amdgpu: fix user fence write race condition
  drm/i915: Try GGTT mmapping whole object as partial
  drm/amdgpu/pm: fix display count in non-DC path
  drm/amdgpu: fix swapped emit_ib_size in vce3
  drm: Use kvzalloc for allocating blob property memory
  drm/i915/gvt: changed DDI mode emulation type
  drm/i915/gvt: fix a bug of partially write ggtt enties
  drm/exynos: Replace drm_dev_unref with drm_dev_put
  drm/exynos: Replace drm_gem_object_unreference_unlocked with put function
  drm/exynos: Replace drm_framebuffer_{un/reference} with put,get functions
  drm/exynos: ipp: use correct enum type
  drm/exynos: decon5433: Fix WINCONx reset value
  drm/exynos: decon5433: Fix per-plane global alpha for XRGB modes
  drm/exynos: fimc: Use real buffer width for configuring the hardware
  ...

5 years agoMerge tag 'trace-v4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Fri, 6 Jul 2018 02:29:07 +0000 (19:29 -0700)]
Merge tag 'trace-v4.18-rc3' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes and cleanups from Steven Rostedt:
 "While cleaning out my INBOX, I found a few patches that were lost in
  the noise. These are minor bug fixes and clean ups. Those include:

   - avoid a string overflow

   - code that didn't match the comment (but should)

   - a small code optimization (use of a conditional)

   - quiet printf warnings

   - nuke unused code

   - fix function graph interrupt annotation"

* tag 'trace-v4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix missing return symbol in function_graph output
  ftrace: Nuke clear_ftrace_function
  tracing: Use __printf markup to silence compiler
  tracing: Optimize trace_buffer_iter() logic
  tracing: Make create_filter() code match the comments
  tracing: Avoid string overflow

5 years agoMerge tag 'exynos-drm-fixes-for-v4.18-rc4' of git://git.kernel.org/pub/scm/linux...
Dave Airlie [Fri, 6 Jul 2018 00:46:58 +0000 (10:46 +1000)]
Merge tag 'exynos-drm-fixes-for-v4.18-rc4' of git://git./linux/kernel/git/daeinki/drm-exynos into drm-fixes

Fixups
- Fix several problems to IPPv2 merged to mainline recentely.
  . An align problem of width size that IPP driver incorrectly
    calculated the real buffer size.
  . Horizontal and vertical flip problem.
  . Per-plane global alpha for XRGB modes.
  . Incorrect variant of the YUV modes.
- Fix plane overlapping problem.
  . The stange order of overlapping planes on XRGB modes
    by setting global alpha value to maximum value.

Cleanup
- Rename a enum type, drm_ipp_size_id, to one specific to Exynos,
  drm_exynos_ipp_limit_type.
- Replace {un/reference} with {put,get} functions.
  . it replaces several reference/unreference functions with Linux
    kernel nameing standard.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1530512041-21392-1-git-send-email-inki.dae@samsung.com
5 years agoMerge branch 'drm-fixes-4.18' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Fri, 6 Jul 2018 00:44:35 +0000 (10:44 +1000)]
Merge branch 'drm-fixes-4.18' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

- Fix an HDMI 2.0 4k@60 regression
- Hotplug fixes for PX/HG laptops
- Fixes for vbios changes in vega12
- Fix a race in the user fence code
- Fix a couple of misc typos

Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180705155206.2752-1-alexander.deucher@amd.com
5 years agoMerge tag 'drm-intel-fixes-2018-07-05' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 6 Jul 2018 00:44:04 +0000 (10:44 +1000)]
Merge tag 'drm-intel-fixes-2018-07-05' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

A couple of GVT fixes, and a GGTT mmapping fix.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8736wxq35t.fsf@intel.com
5 years agoMerge tag 'drm-misc-fixes-2018-07-05' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 6 Jul 2018 00:41:12 +0000 (10:41 +1000)]
Merge tag 'drm-misc-fixes-2018-07-05' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Fixes for v4.18-rc4:
- A few small fixes for the sii8620 bridge.
- Allocate blob property memory using kvzalloc instead of kmalloc.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4267636e-bb7c-8f69-eeff-12e045b3e7e1@linux.intel.com
5 years agoFix up non-directory creation in SGID directories
Linus Torvalds [Wed, 4 Jul 2018 00:10:19 +0000 (17:10 -0700)]
Fix up non-directory creation in SGID directories

sgid directories have special semantics, making newly created files in
the directory belong to the group of the directory, and newly created
subdirectories will also become sgid.  This is historically used for
group-shared directories.

But group directories writable by non-group members should not imply
that such non-group members can magically join the group, so make sure
to clear the sgid bit on non-directories for non-members (but remember
that sgid without group execute means "mandatory locking", just to
confuse things even more).

Reported-by: Jann Horn <jannh@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoRevert "iommu/intel-iommu: Enable CONFIG_DMA_DIRECT_OPS=y and clean up intel_{alloc...
Christoph Hellwig [Thu, 5 Jul 2018 19:29:55 +0000 (13:29 -0600)]
Revert "iommu/intel-iommu: Enable CONFIG_DMA_DIRECT_OPS=y and clean up intel_{alloc,free}_coherent()"

This commit may cause a less than required dma mask to be used for
some allocations, which apparently leads to module load failures for
iwlwifi sometimes.

This reverts commit d657c5c73ca987214a6f9436e435b34fc60f332a.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Fabio Coatti <fabio.coatti@gmail.com>
Tested-by: Fabio Coatti <fabio.coatti@gmail.com>
5 years agocifs: Fix stack out-of-bounds in smb{2,3}_create_lease_buf() 4.18-rc3-smb3fixes
Stefano Brivio [Thu, 5 Jul 2018 13:10:02 +0000 (15:10 +0200)]
cifs: Fix stack out-of-bounds in smb{2,3}_create_lease_buf()

smb{2,3}_create_lease_buf() store a lease key in the lease
context for later usage on a lease break.

In most paths, the key is currently sourced from data that
happens to be on the stack near local variables for oplock in
SMB2_open() callers, e.g. from open_shroot(), whereas
smb2_open_file() properly allocates space on its stack for it.

The address of those local variables holding the oplock is then
passed to create_lease_buf handlers via SMB2_open(), and 16
bytes near oplock are used. This causes a stack out-of-bounds
access as reported by KASAN on SMB2.1 and SMB3 mounts (first
out-of-bounds access is shown here):

[  111.528823] BUG: KASAN: stack-out-of-bounds in smb3_create_lease_buf+0x399/0x3b0 [cifs]
[  111.530815] Read of size 8 at addr ffff88010829f249 by task mount.cifs/985
[  111.532838] CPU: 3 PID: 985 Comm: mount.cifs Not tainted 4.18.0-rc3+ #91
[  111.534656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[  111.536838] Call Trace:
[  111.537528]  dump_stack+0xc2/0x16b
[  111.540890]  print_address_description+0x6a/0x270
[  111.542185]  kasan_report+0x258/0x380
[  111.544701]  smb3_create_lease_buf+0x399/0x3b0 [cifs]
[  111.546134]  SMB2_open+0x1ef8/0x4b70 [cifs]
[  111.575883]  open_shroot+0x339/0x550 [cifs]
[  111.591969]  smb3_qfs_tcon+0x32c/0x1e60 [cifs]
[  111.617405]  cifs_mount+0x4f3/0x2fc0 [cifs]
[  111.674332]  cifs_smb3_do_mount+0x263/0xf10 [cifs]
[  111.677915]  mount_fs+0x55/0x2b0
[  111.679504]  vfs_kern_mount.part.22+0xaa/0x430
[  111.684511]  do_mount+0xc40/0x2660
[  111.698301]  ksys_mount+0x80/0xd0
[  111.701541]  do_syscall_64+0x14e/0x4b0
[  111.711807]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  111.713665] RIP: 0033:0x7f372385b5fa
[  111.715311] Code: 48 8b 0d 99 78 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 66 78 2c 00 f7 d8 64 89 01 48
[  111.720330] RSP: 002b:00007ffff27049d8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
[  111.722601] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f372385b5fa
[  111.724842] RDX: 000055c2ecdc73b2 RSI: 000055c2ecdc73f9 RDI: 00007ffff270580f
[  111.727083] RBP: 00007ffff2705804 R08: 000055c2ee976060 R09: 0000000000001000
[  111.729319] R10: 0000000000000000 R11: 0000000000000206 R12: 00007f3723f4d000
[  111.731615] R13: 000055c2ee976060 R14: 00007f3723f4f90f R15: 0000000000000000

[  111.735448] The buggy address belongs to the page:
[  111.737420] page:ffffea000420a7c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
[  111.739890] flags: 0x17ffffc0000000()
[  111.741750] raw: 0017ffffc0000000 0000000000000000 dead000000000200 0000000000000000
[  111.744216] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[  111.746679] page dumped because: kasan: bad access detected

[  111.750482] Memory state around the buggy address:
[  111.752562]  ffff88010829f100: 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 00
[  111.754991]  ffff88010829f180: 00 00 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00
[  111.757401] >ffff88010829f200: 00 00 00 00 00 f1 f1 f1 f1 01 f2 f2 f2 f2 f2 f2
[  111.759801]                                               ^
[  111.762034]  ffff88010829f280: f2 02 f2 f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00
[  111.764486]  ffff88010829f300: f2 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[  111.766913] ==================================================================

Lease keys are however already generated and stored in fid data
on open and create paths: pass them down to the lease context
creation handlers and use them.

Suggested-by: Aurélien Aptel <aaptel@suse.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Fixes: b8c32dbb0deb ("CIFS: Request SMB2.1 leases")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agocifs: Fix infinite loop when using hard mount option
Paulo Alcantara [Thu, 5 Jul 2018 16:46:34 +0000 (13:46 -0300)]
cifs: Fix infinite loop when using hard mount option

For every request we send, whether it is SMB1 or SMB2+, we attempt to
reconnect tcon (cifs_reconnect_tcon or smb2_reconnect) before carrying
out the request.

So, while server->tcpStatus != CifsNeedReconnect, we wait for the
reconnection to succeed on wait_event_interruptible_timeout(). If it
returns, that means that either the condition was evaluated to true, or
timeout elapsed, or it was interrupted by a signal.

Since we're not handling the case where the process woke up due to a
received signal (-ERESTARTSYS), the next call to
wait_event_interruptible_timeout() will _always_ fail and we end up
looping forever inside either cifs_reconnect_tcon() or smb2_reconnect().

Here's an example of how to trigger that:

$ mount.cifs //foo/share /mnt/test -o
username=foo,password=foo,vers=1.0,hard

(break connection to server before executing bellow cmd)
$ stat -f /mnt/test & sleep 140
[1] 2511

$ ps -aux -q 2511
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      2511  0.0  0.0  12892  1008 pts/0    S    12:24   0:00 stat -f
/mnt/test

$ kill -9 2511

(wait for a while; process is stuck in the kernel)
$ ps -aux -q 2511
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      2511 83.2  0.0  12892  1008 pts/0    R    12:24  30:01 stat -f
/mnt/test

By using 'hard' mount point means that cifs.ko will keep retrying
indefinitely, however we must allow the process to be killed otherwise
it would hang the system.

Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Cc: stable@vger.kernel.org
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agocifs: Fix slab-out-of-bounds in send_set_info() on SMB2 ACE setting
Stefano Brivio [Thu, 5 Jul 2018 09:46:42 +0000 (11:46 +0200)]
cifs: Fix slab-out-of-bounds in send_set_info() on SMB2 ACE setting

A "small" CIFS buffer is not big enough in general to hold a
setacl request for SMB2, and we end up overflowing the buffer in
send_set_info(). For instance:

 # mount.cifs //127.0.0.1/test /mnt/test -o username=test,password=test,nounix,cifsacl
 # touch /mnt/test/acltest
 # getcifsacl /mnt/test/acltest
 REVISION:0x1
 CONTROL:0x9004
 OWNER:S-1-5-21-2926364953-924364008-418108241-1000
 GROUP:S-1-22-2-1001
 ACL:S-1-5-21-2926364953-924364008-418108241-1000:ALLOWED/0x0/0x1e01ff
 ACL:S-1-22-2-1001:ALLOWED/0x0/R
 ACL:S-1-22-2-1001:ALLOWED/0x0/R
 ACL:S-1-5-21-2926364953-924364008-418108241-1000:ALLOWED/0x0/0x1e01ff
 ACL:S-1-1-0:ALLOWED/0x0/R
 # setcifsacl -a "ACL:S-1-22-2-1004:ALLOWED/0x0/R" /mnt/test/acltest

this setacl will cause the following KASAN splat:

[  330.777927] BUG: KASAN: slab-out-of-bounds in send_set_info+0x4dd/0xc20 [cifs]
[  330.779696] Write of size 696 at addr ffff88010d5e2860 by task setcifsacl/1012

[  330.781882] CPU: 1 PID: 1012 Comm: setcifsacl Not tainted 4.18.0-rc2+ #2
[  330.783140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[  330.784395] Call Trace:
[  330.784789]  dump_stack+0xc2/0x16b
[  330.786777]  print_address_description+0x6a/0x270
[  330.787520]  kasan_report+0x258/0x380
[  330.788845]  memcpy+0x34/0x50
[  330.789369]  send_set_info+0x4dd/0xc20 [cifs]
[  330.799511]  SMB2_set_acl+0x76/0xa0 [cifs]
[  330.801395]  set_smb2_acl+0x7ac/0xf30 [cifs]
[  330.830888]  cifs_xattr_set+0x963/0xe40 [cifs]
[  330.840367]  __vfs_setxattr+0x84/0xb0
[  330.842060]  __vfs_setxattr_noperm+0xe6/0x370
[  330.843848]  vfs_setxattr+0xc2/0xd0
[  330.845519]  setxattr+0x258/0x320
[  330.859211]  path_setxattr+0x15b/0x1b0
[  330.864392]  __x64_sys_setxattr+0xc0/0x160
[  330.866133]  do_syscall_64+0x14e/0x4b0
[  330.876631]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  330.878503] RIP: 0033:0x7ff2e507db0a
[  330.880151] Code: 48 8b 0d 89 93 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 bc 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 56 93 2c 00 f7 d8 64 89 01 48
[  330.885358] RSP: 002b:00007ffdc4903c18 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
[  330.887733] RAX: ffffffffffffffda RBX: 000055d1170de140 RCX: 00007ff2e507db0a
[  330.890067] RDX: 000055d1170de7d0 RSI: 000055d115b39184 RDI: 00007ffdc4904818
[  330.892410] RBP: 0000000000000001 R08: 0000000000000000 R09: 000055d1170de7e4
[  330.894785] R10: 00000000000002b8 R11: 0000000000000246 R12: 0000000000000007
[  330.897148] R13: 000055d1170de0c0 R14: 0000000000000008 R15: 000055d1170de550

[  330.901057] Allocated by task 1012:
[  330.902888]  kasan_kmalloc+0xa0/0xd0
[  330.904714]  kmem_cache_alloc+0xc8/0x1d0
[  330.906615]  mempool_alloc+0x11e/0x380
[  330.908496]  cifs_small_buf_get+0x35/0x60 [cifs]
[  330.910510]  smb2_plain_req_init+0x4a/0xd60 [cifs]
[  330.912551]  send_set_info+0x198/0xc20 [cifs]
[  330.914535]  SMB2_set_acl+0x76/0xa0 [cifs]
[  330.916465]  set_smb2_acl+0x7ac/0xf30 [cifs]
[  330.918453]  cifs_xattr_set+0x963/0xe40 [cifs]
[  330.920426]  __vfs_setxattr+0x84/0xb0
[  330.922284]  __vfs_setxattr_noperm+0xe6/0x370
[  330.924213]  vfs_setxattr+0xc2/0xd0
[  330.926008]  setxattr+0x258/0x320
[  330.927762]  path_setxattr+0x15b/0x1b0
[  330.929592]  __x64_sys_setxattr+0xc0/0x160
[  330.931459]  do_syscall_64+0x14e/0x4b0
[  330.933314]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

[  330.936843] Freed by task 0:
[  330.938588] (stack is not available)

[  330.941886] The buggy address belongs to the object at ffff88010d5e2800
 which belongs to the cache cifs_small_rq of size 448
[  330.946362] The buggy address is located 96 bytes inside of
 448-byte region [ffff88010d5e2800ffff88010d5e29c0)
[  330.950722] The buggy address belongs to the page:
[  330.952789] page:ffffea0004357880 count:1 mapcount:0 mapping:ffff880108fdca80 index:0x0 compound_mapcount: 0
[  330.955665] flags: 0x17ffffc0008100(slab|head)
[  330.957760] raw: 0017ffffc0008100 dead000000000100 dead000000000200 ffff880108fdca80
[  330.960356] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[  330.963005] page dumped because: kasan: bad access detected

[  330.967039] Memory state around the buggy address:
[  330.969255]  ffff88010d5e2880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[  330.971833]  ffff88010d5e2900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[  330.974397] >ffff88010d5e2980: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
[  330.976956]                                            ^
[  330.979226]  ffff88010d5e2a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  330.981755]  ffff88010d5e2a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  330.984225] ==================================================================

Fix this by allocating a regular CIFS buffer in
smb2_plain_req_init() if the request command is SMB2_SET_INFO.

Reported-by: Jianhong Yin <jiyin@redhat.com>
Fixes: 366ed846df60 ("cifs: Use smb 2 - 3 and cifsacl mount options setacl function")
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-and-tested-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agocifs: Fix memory leak in smb2_set_ea()
Paulo Alcantara [Wed, 4 Jul 2018 17:16:16 +0000 (14:16 -0300)]
cifs: Fix memory leak in smb2_set_ea()

This patch fixes a memory leak when doing a setxattr(2) in SMB2+.

Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
5 years agocifs: fix SMB1 breakage
Ronnie Sahlberg [Thu, 28 Jun 2018 00:47:14 +0000 (10:47 +1000)]
cifs: fix SMB1 breakage

SMB1 mounting broke in commit 35e2cc1ba755
("cifs: Use correct packet length in SMB2_TRANSFORM header")
Fix it and also rename smb2_rqst_len to smb_rqst_len
to make it less unobvious that the function is also called from
CIFS/SMB1

Good job by Paulo reviewing and cleaning up Ronnie's original patch.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Paulo Alcantara <palcantara@suse.de>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agocifs: Fix validation of signed data in smb2
Paulo Alcantara [Sat, 23 Jun 2018 17:52:24 +0000 (14:52 -0300)]
cifs: Fix validation of signed data in smb2

Fixes: c713c8770fa5 ("cifs: push rfc1002 generation down the stack")
We failed to validate signed data returned by the server because
__cifs_calc_signature() now expects to sign the actual data in iov but
we were also passing down the rfc1002 length.

Fix smb3_calc_signature() to calculate signature of rfc1002 length prior
to passing only the actual data iov[1-N] to __cifs_calc_signature(). In
addition, there are a few cases where no rfc1002 length is passed so we
make sure there's one (iov_len == 4).

Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agocifs: Fix validation of signed data in smb3+
Paulo Alcantara [Sat, 23 Jun 2018 17:52:23 +0000 (14:52 -0300)]
cifs: Fix validation of signed data in smb3+

Fixes: c713c8770fa5 ("cifs: push rfc1002 generation down the stack")
We failed to validate signed data returned by the server because
__cifs_calc_signature() now expects to sign the actual data in iov but
we were also passing down the rfc1002 length.

Fix smb3_calc_signature() to calculate signature of rfc1002 length prior
to passing only the actual data iov[1-N] to __cifs_calc_signature(). In
addition, there are a few cases where no rfc1002 length is passed so we
make sure there's one (iov_len == 4).

Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agocifs: Fix use after free of a mid_q_entry
Lars Persson [Mon, 25 Jun 2018 12:05:25 +0000 (14:05 +0200)]
cifs: Fix use after free of a mid_q_entry

With protocol version 2.0 mounts we have seen crashes with corrupt mid
entries. Either the server->pending_mid_q list becomes corrupt with a
cyclic reference in one element or a mid object fetched by the
demultiplexer thread becomes overwritten during use.

Code review identified a race between the demultiplexer thread and the
request issuing thread. The demultiplexer thread seems to be written
with the assumption that it is the sole user of the mid object until
it calls the mid callback which either wakes the issuer task or
deletes the mid.

This assumption is not true because the issuer task can be woken up
earlier by a signal. If the demultiplexer thread has proceeded as far
as setting the mid_state to MID_RESPONSE_RECEIVED then the issuer
thread will happily end up calling cifs_delete_mid while the
demultiplexer thread still is using the mid object.

Inserting a delay in the cifs demultiplexer thread widens the race
window and makes reproduction of the race very easy:

if (server->large_buf)
buf = server->bigbuf;

+ usleep_range(500, 4000);

server->lstrp = jiffies;

To resolve this I think the proper solution involves putting a
reference count on the mid object. This patch makes sure that the
demultiplexer thread holds a reference until it has finished
processing the transaction.

Cc: stable@vger.kernel.org
Signed-off-by: Lars Persson <larper@axis.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agoautofs: rename 'autofs' module back to 'autofs4'
Linus Torvalds [Thu, 5 Jul 2018 01:17:51 +0000 (18:17 -0700)]
autofs: rename 'autofs' module back to 'autofs4'

It turns out that systemd has a bug: it wants to load the autofs module
early because of some initialization ordering with udev, and it doesn't
do that correctly.  Everywhere else it does the proper "look up module
name" that does the proper alias resolution, but in that early code, it
just uses a hardcoded "autofs4" for the module name.

The result of that is that as of commit a2225d931f75 ("autofs: remove
left-over autofs4 stubs"), you get

    systemd[1]: Failed to insert module 'autofs4': No such file or directory

in the system logs, and a lack of module loading.  All this despite the
fact that we had very clearly marked 'autofs4' as an alias for this
module.

What's so ridiculous about this is that literally everything else does
the module alias handling correctly, including really old versions of
systemd (that just used 'modprobe' to do this), and even all the other
systemd module loading code.

Only that special systemd early module load code is broken, hardcoding
the module names for not just 'autofs4', but also "ipv6", "unix",
"ip_tables" and "virtio_rng".  Very annoying.

Instead of creating an _additional_ separate compatibility 'autofs4'
module, just rely on the fact that everybody else gets this right, and
just call the module 'autofs4' for compatibility reasons, with 'autofs'
as the alias name.

That will allow the systemd people to fix their bugs, adding the proper
alias handling, and maybe even fix the name of the module to be just
"autofs" (so that they can _test_ the alias handling).  And eventually,
we can revert this silly compatibility hack.

See also

    https://github.com/systemd/systemd/issues/9501
    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=902946

for the systemd bug reports upstream and in the Debian bug tracker
respectively.

Fixes: a2225d931f75 ("autofs: remove left-over autofs4 stubs")
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Reported-by: Michael Biebl <biebl@debian.org>
Cc: Ian Kent <raven@themaw.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoarm64: remove no-op -p linker flag
Greg Hackmann [Wed, 27 Jun 2018 19:46:14 +0000 (12:46 -0700)]
arm64: remove no-op -p linker flag

Linking the ARM64 defconfig kernel with LLVM lld fails with the error:

  ld.lld: error: unknown argument: -p
  Makefile:1015: recipe for target 'vmlinux' failed

Without this flag, the ARM64 defconfig kernel successfully links with
lld and boots on Dragonboard 410c.

After digging through binutils source and changelogs, it turns out that
-p is only relevant to ancient binutils installations targeting 32-bit
ARM.  binutils accepts -p for AArch64 too, but it's always been
undocumented and silently ignored.  A comment in
ld/emultempl/aarch64elf.em explains that it's "Only here for backwards
compatibility".

Since this flag is a no-op on ARM64, we can safely drop it.

Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
5 years agoMerge tag 'acpi-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Thu, 5 Jul 2018 16:52:30 +0000 (09:52 -0700)]
Merge tag 'acpi-4.18-rc4' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "These fix a recent ACPICA regression, fix a battery driver regression
  introduced during the 4.17 cycle and fix up the recently added support
  for the PPTT ACPI table.

  Specifics:

   - Revert part of a recent ACPICA regression fix that added leading
     newlines to ACPICA error messages and made the kernel log look
     broken (Rafael Wysocki).

   - Fix an ACPI battery driver regression introduced during the 4.17
     cycle due to incorrect error handling that made Thinkpad 13 laptops
     crash on boot (Jouke Witteveen).

   - Fix up the recently added PPTT ACPI table support by covering the
     case when a PPTT structure represents a processors group correctly
     (Sudeep Holla)"

* tag 'acpi-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / battery: Safe unregistering of hooks
  ACPI / PPTT: use ACPI ID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set
  ACPICA: Drop leading newlines from error messages

5 years agoMerge tag 'pm-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Thu, 5 Jul 2018 16:50:18 +0000 (09:50 -0700)]
Merge tag 'pm-4.18-rc4' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix a PCI power management regression introduced during the 4.17
  cycle and fix up the recently added support for devices in multiple
  power domains.

  Specifics:

   - Resume parallel PCI (non-PCIe) bridges on suspend-to-RAM (ACP S3)
     to avoid confusing the platform firmware which started to happen
     after a core power management regression fix that went in during
     the 4.17 cycle (Rafael Wysocki).

   - Fix up the recently added support for devices in multiple power
     domains by avoiding to power up the entire domain unnecessarily
     when attaching a device to it (Ulf Hansson)"

* tag 'pm-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / Domains: Don't power on at attach for the multi PM domain case
  PCI / ACPI / PM: Resume bridges w/o drivers on suspend-to-RAM

5 years agoMerge tag 'riscv-for-linus-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 5 Jul 2018 16:47:18 +0000 (09:47 -0700)]
Merge tag 'riscv-for-linus-4.18-rc4' of git://git./linux/kernel/git/palmer/riscv-linux

Pull RISC-V fixes from Palmer Dabbelt:
 "This contains a handful of fixes for the RISC-V port:

   - A fix to R_RISCV_ADD32/R_RISCV_SUB32 relocations that allows
     modules that use these to load correctly.

   - The removal of of_platform_populate(), which is obselete.

   - The removal of irq-riscv-intc.h, which is obselete.

   - A fix to PTRACE_SETREGSET.

   - Fixes that allow the RV32I kernel to build (at least for Zong, I've
     got another patch on the mailing list that's necessary on my setup :)).

  I've just given these a defconfig build test"

* tag 'riscv-for-linus-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
  RISC-V: Fix PTRACE_SETREGSET bug.
  RISC-V: Don't include irq-riscv-intc.h
  riscv: remove unnecessary of_platform_populate call
  RISC-V: fix R_RISCV_ADD32/R_RISCV_SUB32 relocations
  RISC-V: Change variable type for 32-bit compatible
  RISC-V: Add definiion of extract symbol's index and type for 32-bit
  RISC-V: Select GENERIC_UCMPDI2 on RV32I
  RISC-V: Add conditional macro for zone of DMA32

5 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Linus Torvalds [Thu, 5 Jul 2018 16:45:25 +0000 (09:45 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/gerg/m68knommu

Pull m68knommu fix from Greg Ungerer:
 "A single fix for breakage introduced in this merge window"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68k: fix "bad page state" oops on ColdFire boot

5 years agodrm/amd/display: add a check for display depth validity
Mikita Lipski [Wed, 4 Jul 2018 21:27:56 +0000 (17:27 -0400)]
drm/amd/display: add a check for display depth validity

[why]
HDMI 2.0 fails to validate 4K@60 timing with 10 bpc
[how]
Adding a helper function that would verify if the display depth
assigned would pass a bandwidth validation.
Drop the display depth by one level till calculated pixel clk
is lower than maximum TMDS clk.

Bugzilla: https://bugs.freedesktop.org/106959

Tested-by: Mike Lothian <mike@fireburn.co.uk>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
5 years agodrm/amd/display: adding ycbcr420 pixel encoding for hdmi
Mikita Lipski [Wed, 4 Jul 2018 21:26:26 +0000 (17:26 -0400)]
drm/amd/display: adding ycbcr420 pixel encoding for hdmi

[why]
HDMI EDID's VSDB contains spectial timings for specifically
YCbCr 4:2:0 colour space. In those cases we need to verify
if the mode provided is one of the special ones has to use
YCbCr 4:2:0 pixel encoding for display info.
[how]
Verify if the mode is using specific ycbcr420 colour space with
the help of DRM helper function and assign the mode to use
ycbcr420 pixel encoding.

Tested-by: Mike Lothian <mike@fireburn.co.uk>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
5 years agoMerge branches 'acpi-tables' and 'acpica'
Rafael J. Wysocki [Thu, 5 Jul 2018 11:03:43 +0000 (13:03 +0200)]
Merge branches 'acpi-tables' and 'acpica'

Merge ACPICA regression fix and a fix for the recently added PPTT
support.

* acpi-tables:
  ACPI / PPTT: use ACPI ID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set

* acpica:
  ACPICA: Drop leading newlines from error messages

5 years agoMerge branch 'pm-pci'
Rafael J. Wysocki [Thu, 5 Jul 2018 10:47:16 +0000 (12:47 +0200)]
Merge branch 'pm-pci'

Merge a PCI power management regression fix.

* pm-pci:
  PCI / ACPI / PM: Resume bridges w/o drivers on suspend-to-RAM

5 years agodrm/udl: fix display corruption of the last line
Mikulas Patocka [Sun, 3 Jun 2018 14:40:54 +0000 (16:40 +0200)]
drm/udl: fix display corruption of the last line

The displaylink hardware has such a peculiarity that it doesn't render a
command until next command is received. This produces occasional
corruption, such as when setting 22x11 font on the console, only the first
line of the cursor will be blinking if the cursor is located at some
specific columns.

When we end up with a repeating pixel, the driver has a bug that it leaves
one uninitialized byte after the command (and this byte is enough to flush
the command and render it - thus it fixes the screen corruption), however
whe we end up with a non-repeating pixel, there is no byte appended and
this results in temporary screen corruption.

This patch fixes the screen corruption by always appending a byte 0xAF at
the end of URB. It also removes the uninitialized byte.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
5 years agoarm64: add endianness option to LDFLAGS instead of LD
Masahiro Yamada [Tue, 3 Jul 2018 01:22:00 +0000 (10:22 +0900)]
arm64: add endianness option to LDFLAGS instead of LD

With the recent syntax extension, Kconfig is now able to evaluate the
compiler / toolchain capability.

However, accumulating flags to 'LD' is not compatible with the way
it works; 'LD' must be passed to Kconfig to call $(ld-option,...)
from Kconfig files.  If you tweak 'LD' in arch Makefile depending on
CONFIG_CPU_BIG_ENDIAN, this would end up with circular dependency
between Makefile and Kconfig.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
5 years agoRISC-V: Fix the rv32i kernel build
Palmer Dabbelt [Wed, 4 Jul 2018 21:12:53 +0000 (14:12 -0700)]
RISC-V: Fix the rv32i kernel build

These patches for building 32-bit RISC-V kernel.
 - Fix the compile errors and warnings on RV32I.
 - Fix some incompatible problem on RV32I.
 - Add format.h for compatible of print format.

The fixed width integer types format for Elf_Addr will move to
generic header by another patch. For now, there are some warning
about unexpected argument of type on RV32I.

Change in v1:
 - Fix some error in v1
 - Remove implementation of fixed width integer types format for Elf_Addr.

5 years agoRISC-V: Fix PTRACE_SETREGSET bug.
Jim Wilson [Mon, 11 Jun 2018 21:48:22 +0000 (14:48 -0700)]
RISC-V: Fix PTRACE_SETREGSET bug.

In riscv_gpr_set, pass regs instead of &regs to user_regset_copyin to fix
gdb segfault.

Signed-off-by: Jim Wilson <jimw@sifive.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
5 years agoRISC-V: Don't include irq-riscv-intc.h
Palmer Dabbelt [Fri, 22 Jun 2018 22:46:28 +0000 (15:46 -0700)]
RISC-V: Don't include irq-riscv-intc.h

This file has never existed in the upstream kernel, but it's guarded by
an #ifdef that's also never existed in the upstream kernel.  As a part
of our interrupt controller refactoring this header is no longer
necessary, but this reference managed to sneak in anyway.

Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
5 years agoriscv: remove unnecessary of_platform_populate call
Rob Herring [Tue, 19 Jun 2018 21:41:34 +0000 (15:41 -0600)]
riscv: remove unnecessary of_platform_populate call

The DT core will call of_platform_default_populate, so it is not
necessary for arch specific code to call it unless there are custom
match entries, auxdata or parent device. Neither of those apply here, so
remove the call.

Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: linux-riscv@lists.infradead.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
5 years agoRISC-V: fix R_RISCV_ADD32/R_RISCV_SUB32 relocations
Andreas Schwab [Tue, 12 Jun 2018 17:26:36 +0000 (19:26 +0200)]
RISC-V: fix R_RISCV_ADD32/R_RISCV_SUB32 relocations

The R_RISCV_ADD32/R_RISCV_SUB32 relocations should add/subtract the
address of the symbol (without overflow check), not its contents.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
5 years agoRISC-V: Change variable type for 32-bit compatible
Zong Li [Mon, 25 Jun 2018 08:49:40 +0000 (16:49 +0800)]
RISC-V: Change variable type for 32-bit compatible

Signed-off-by: Zong Li <zong@andestech.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
5 years agoRISC-V: Add definiion of extract symbol's index and type for 32-bit
Zong Li [Mon, 25 Jun 2018 08:49:39 +0000 (16:49 +0800)]
RISC-V: Add definiion of extract symbol's index and type for 32-bit

Use generic marco to get the index and type of symbol.

Signed-off-by: Zong Li <zong@andestech.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
5 years agoRISC-V: Select GENERIC_UCMPDI2 on RV32I
Zong Li [Mon, 25 Jun 2018 08:49:38 +0000 (16:49 +0800)]
RISC-V: Select GENERIC_UCMPDI2 on RV32I

On 32-bit, it need to use __ucmpdi2, otherwise, it can't find the __ucmpdi2
symbol.

Signed-off-by: Zong Li <zong@andestech.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
5 years agoRISC-V: Add conditional macro for zone of DMA32
Zong Li [Mon, 25 Jun 2018 08:49:37 +0000 (16:49 +0800)]
RISC-V: Add conditional macro for zone of DMA32

The DMA32 is for 64-bit usage.

Signed-off-by: Zong Li <zong@andestech.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
5 years agosample/vfio-mdev: Change return type to vm_fault_t
Souptick Joarder [Wed, 4 Jul 2018 15:30:14 +0000 (21:00 +0530)]
sample/vfio-mdev: Change return type to vm_fault_t

convert mbochs_region_vm_fault and mbochs_dmabuf_vm_fault
to return vm_fault_t type.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
5 years agoarm64: Use aarch64elf and aarch64elfb emulation mode variants
Paul Kocialkowski [Mon, 2 Jul 2018 09:16:59 +0000 (11:16 +0200)]
arm64: Use aarch64elf and aarch64elfb emulation mode variants

The aarch64linux and aarch64linuxb emulation modes are not supported by
bare-metal toolchains and Linux using them forbids building the kernel
with these toolchains.

Since there is apparently no reason to target these emulation modes, the
more generic elf modes are used instead, allowing to build on bare-metal
toolchains as well as the already-supported ones.

Fixes: 3d6a7b99e3fa ("arm64: ensure the kernel is compiled for LP64")
Cc: stable@vger.kernel.org
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
5 years agodrm/bridge/sii8620: Fix link mode selection
Maciej Purski [Thu, 28 Jun 2018 16:44:03 +0000 (18:44 +0200)]
drm/bridge/sii8620: Fix link mode selection

Current link mode values do not allow to enable packed pixel modes.

Select packed pixel clock mode, if needed, every time the link mode
register gets updated.

Signed-off-by: Maciej Purski <m.purski@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1530204243-6370-4-git-send-email-m.purski@samsung.com
5 years agodrm/bridge/sii8620: Fix display of packed pixel modes
Maciej Purski [Thu, 28 Jun 2018 16:44:02 +0000 (18:44 +0200)]
drm/bridge/sii8620: Fix display of packed pixel modes

Current implementation does not guarantee packed pixel modes working
with every dongle. There are some dongles, which require selecting
the output mode explicitly.

Write proper values to registers in packed_pixel mode, based on how it
is done in vendor's code. Select output color space: RGB
(no packed pixel) or YCBCR422 (packed pixel).

This reverts commit e8b92efa629dac0e70ea4145c5e70616de5f89c8
("drm/bridge/sii8620: fix display of packed pixel modes in MHL2").

Signed-off-by: Maciej Purski <m.purski@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1530204243-6370-3-git-send-email-m.purski@samsung.com
5 years agodrm/bridge/sii8620: Send AVI infoframe in all MHL versions
Maciej Purski [Thu, 28 Jun 2018 16:44:01 +0000 (18:44 +0200)]
drm/bridge/sii8620: Send AVI infoframe in all MHL versions

Currently AVI infoframe is sent only in MHL3. However, some MHL2 dongles
need AVI infoframe to work correctly in either packed pixel mode or
non-packed pixel mode.

Send AVI infoframe in set_infoframes() in every case. Create an
infoframe using drm_hdmi_infoframe_from_display_mode() instead of
manually filling each infoframe structure's field.

Signed-off-by: Maciej Purski <m.purski@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1530204243-6370-2-git-send-email-m.purski@samsung.com
5 years agoACPI / battery: Safe unregistering of hooks
Jouke Witteveen [Wed, 4 Jul 2018 10:27:15 +0000 (12:27 +0200)]
ACPI / battery: Safe unregistering of hooks

A hooking API was implemented for 4.17 in fa93854f7a7ed63d followed
by hooks for Thinkpad laptops in 2801b9683f740012. The Thinkpad
drivers did not support the Thinkpad 13 and the hooking API crashes
on unsupported batteries by altering a list of hooks during unsafe
iteration. Thus, Thinkpad 13 laptops could no longer boot.

Additionally, a lock was kept in place and debugging information was
printed out of order.

Fixes: fa93854f7a7e (battery: Add the battery hooking API)
Cc: 4.17+ <stable@vger.kernel.org> # 4.17+
Signed-off-by: Jouke Witteveen <j.witteveen@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
5 years agodrm/amdgpu: fix user fence write race condition
Nicolai Hähnle [Fri, 29 Jun 2018 11:23:25 +0000 (13:23 +0200)]
drm/amdgpu: fix user fence write race condition

The buffer object backing the user fence is reserved using the non-user
fence, i.e., as soon as the non-user fence is signaled, the user fence
buffer object can be moved or even destroyed.

Therefore, emit the user fence first.

Both fences have the same cache invalidation behavior, so this should
have no user-visible effect.

Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
5 years agos390: wire up rseq system call
Heiko Carstens [Sat, 30 Jun 2018 08:54:15 +0000 (10:54 +0200)]
s390: wire up rseq system call

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
5 years agos390: wire up io_pgetevents system call
Heiko Carstens [Sat, 30 Jun 2018 08:53:57 +0000 (10:53 +0200)]
s390: wire up io_pgetevents system call

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
5 years agomm: teach dump_page() to correctly output poisoned struct pages
Pavel Tatashin [Wed, 4 Jul 2018 00:02:53 +0000 (17:02 -0700)]
mm: teach dump_page() to correctly output poisoned struct pages

If struct page is poisoned, and uninitialized access is detected via
PF_POISONED_CHECK(page) dump_page() is called to output the page.  But,
the dump_page() itself accesses struct page to determine how to print
it, and therefore gets into a recursive loop.

For example:

  dump_page()
   __dump_page()
    PageSlab(page)
     PF_POISONED_CHECK(page)
      VM_BUG_ON_PGFLAGS(PagePoisoned(page), page)
       dump_page() recursion loop.

Link: http://lkml.kernel.org/r/20180702180536.2552-1-pasha.tatashin@oracle.com
Fixes: f165b378bbdf ("mm: uninitialized struct page poisoning sanity checking")
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoARM: disable KCOV for trusted foundations code
Arnd Bergmann [Wed, 4 Jul 2018 00:02:49 +0000 (17:02 -0700)]
ARM: disable KCOV for trusted foundations code

The ARM trusted foundations code is currently broken in linux-next when
CONFIG_KCOV_INSTRUMENT_ALL is set:

  /tmp/ccHdQsCI.s: Assembler messages:
  /tmp/ccHdQsCI.s:37: Error: .err encountered
  /tmp/ccHdQsCI.s:38: Error: .err encountered
  /tmp/ccHdQsCI.s:39: Error: .err encountered
  scripts/Makefile.build:311: recipe for target 'arch/arm/firmware/trusted_foundations.o' failed

I could not find a function attribute that lets me disable
-fsanitize-coverage=trace-pc for just one function, so this turns it off
for the entire file instead.

Link: http://lkml.kernel.org/r/20180529103636.1535457-1-arnd@arndb.de
Fixes: 758517202bd2e4 ("arm: port KCOV to arm")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Olof Johansson <olof@lixom.net>
Tested-by: Olof Johansson <olof@lixom.net>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agokasan: fix shadow_size calculation error in kasan_module_alloc
Zhen Lei [Wed, 4 Jul 2018 00:02:46 +0000 (17:02 -0700)]
kasan: fix shadow_size calculation error in kasan_module_alloc

There is a special case that the size is "(N << KASAN_SHADOW_SCALE_SHIFT)
Pages plus X", the value of X is [1, KASAN_SHADOW_SCALE_SIZE-1].  The
operation "size >> KASAN_SHADOW_SCALE_SHIFT" will drop X, and the
roundup operation can not retrieve the missed one page.  For example:
size=0x28006, PAGE_SIZE=0x1000, KASAN_SHADOW_SCALE_SHIFT=3, we will get
shadow_size=0x5000, but actually we need 6 pages.

  shadow_size = round_up(size >> KASAN_SHADOW_SCALE_SHIFT, PAGE_SIZE);

This can lead to a kernel crash when kasan is enabled and the value of
mod->core_layout.size or mod->init_layout.size is like above.  Because
the shadow memory of X has not been allocated and mapped.

move_module:
  ptr = module_alloc(mod->core_layout.size);
  ...
  memset(ptr, 0, mod->core_layout.size); //crashed

  Unable to handle kernel paging request at virtual address ffff0fffff97b000
  ......
  Call trace:
    __asan_storeN+0x174/0x1a8
    memset+0x24/0x48
    layout_and_allocate+0xcd8/0x1800
    load_module+0x190/0x23e8
    SyS_finit_module+0x148/0x180

Link: http://lkml.kernel.org/r/1529659626-12660-1-git-send-email-thunder.leizhen@huawei.com
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: Dmitriy Vyukov <dvyukov@google.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Libin <huawei.libin@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm: hugetlb: yield when prepping struct pages
Cannon Matthews [Wed, 4 Jul 2018 00:02:43 +0000 (17:02 -0700)]
mm: hugetlb: yield when prepping struct pages

When booting with very large numbers of gigantic (i.e.  1G) pages, the
operations in the loop of gather_bootmem_prealloc, and specifically
prep_compound_gigantic_page, takes a very long time, and can cause a
softlockup if enough pages are requested at boot.

For example booting with 3844 1G pages requires prepping
(set_compound_head, init the count) over 1 billion 4K tail pages, which
takes considerable time.

Add a cond_resched() to the outer loop in gather_bootmem_prealloc() to
prevent this lockup.

Tested: Booted with softlockup_panic=1 hugepagesz=1G hugepages=3844 and
no softlockup is reported, and the hugepages are reported as
successfully setup.

Link: http://lkml.kernel.org/r/20180627214447.260804-1-cannonmatthews@google.com
Signed-off-by: Cannon Matthews <cannonmatthews@google.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Peter Feiner <pfeiner@google.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agouserfaultfd: hugetlbfs: fix userfaultfd_huge_must_wait() pte access
Janosch Frank [Wed, 4 Jul 2018 00:02:39 +0000 (17:02 -0700)]
userfaultfd: hugetlbfs: fix userfaultfd_huge_must_wait() pte access

Use huge_ptep_get() to translate huge ptes to normal ptes so we can
check them with the huge_pte_* functions.  Otherwise some architectures
will check the wrong values and will not wait for userspace to bring in
the memory.

Link: http://lkml.kernel.org/r/20180626132421.78084-1-frankja@linux.ibm.com
Fixes: 369cd2121be4 ("userfaultfd: hugetlbfs: userfaultfd_huge_must_wait for hugepmd ranges")
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agotracing: Fix missing return symbol in function_graph output
Changbin Du [Wed, 31 Jan 2018 15:48:49 +0000 (23:48 +0800)]
tracing: Fix missing return symbol in function_graph output

The function_graph tracer does not show the interrupt return marker for the
leaf entry. On leaf entries, we see an unbalanced interrupt marker (the
interrupt was entered, but nevern left).

Before:
 1)               |  SyS_write() {
 1)               |    __fdget_pos() {
 1)   0.061 us    |      __fget_light();
 1)   0.289 us    |    }
 1)               |    vfs_write() {
 1)   0.049 us    |      rw_verify_area();
 1) + 15.424 us   |      __vfs_write();
 1)   ==========> |
 1)   6.003 us    |      smp_apic_timer_interrupt();
 1)   0.055 us    |      __fsnotify_parent();
 1)   0.073 us    |      fsnotify();
 1) + 23.665 us   |    }
 1) + 24.501 us   |  }

After:
 0)               |  SyS_write() {
 0)               |    __fdget_pos() {
 0)   0.052 us    |      __fget_light();
 0)   0.328 us    |    }
 0)               |    vfs_write() {
 0)   0.057 us    |      rw_verify_area();
 0)               |      __vfs_write() {
 0)   ==========> |
 0)   8.548 us    |      smp_apic_timer_interrupt();
 0)   <========== |
 0) + 36.507 us   |      } /* __vfs_write */
 0)   0.049 us    |      __fsnotify_parent();
 0)   0.066 us    |      fsnotify();
 0) + 50.064 us   |    }
 0) + 50.952 us   |  }

Link: http://lkml.kernel.org/r/1517413729-20411-1-git-send-email-changbin.du@intel.com
Cc: stable@vger.kernel.org
Fixes: f8b755ac8e0cc ("tracing/function-graph-tracer: Output arrows signal on hardirq call/return")
Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoftrace: Nuke clear_ftrace_function
Yisheng Xie [Fri, 2 Feb 2018 02:14:49 +0000 (10:14 +0800)]
ftrace: Nuke clear_ftrace_function

clear_ftrace_function is not used outside of ftrace.c and is not help to
use a function, so nuke it per Steve's suggestion.

Link: http://lkml.kernel.org/r/1517537689-34947-1-git-send-email-xieyisheng1@huawei.com
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agotracing: Use __printf markup to silence compiler
Mathieu Malaterre [Thu, 8 Mar 2018 20:58:43 +0000 (21:58 +0100)]
tracing: Use __printf markup to silence compiler

Silence warnings (triggered at W=1) by adding relevant __printf attributes.

  CC      kernel/trace/trace.o
kernel/trace/trace.c: In function â€˜__trace_array_vprintk’:
kernel/trace/trace.c:2979:2: warning: function might be possible candidate for â€˜gnu_printf’ format attribute [-Wsuggest-attribute=format]
  len = vscnprintf(tbuffer, TRACE_BUF_SIZE, fmt, args);
  ^~~
  AR      kernel/trace/built-in.o

Link: http://lkml.kernel.org/r/20180308205843.27447-1-malat@debian.org
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agotracing: Optimize trace_buffer_iter() logic
yuan linyu [Sun, 8 Apr 2018 11:36:31 +0000 (19:36 +0800)]
tracing: Optimize trace_buffer_iter() logic

Simplify and optimize the logic in trace_buffer_iter() to use a conditional
operation instead of an if conditional.

Link: http://lkml.kernel.org/r/20180408113631.3947-1-cugyly@163.com
Signed-off-by: yuan linyu <Linyu.Yuan@alcatel-sbell.com.cn>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agotracing: Make create_filter() code match the comments
Steven Rostedt (VMware) [Mon, 2 Jul 2018 15:41:38 +0000 (11:41 -0400)]
tracing: Make create_filter() code match the comments

The comment in create_filter() states that the passed in filter pointer
(filterp) will either be NULL or contain an error message stating why the
filter failed. But it also expects the filter pointer to point to NULL when
passed in. If it is not, the function create_filter_start() will warn and
return an error message without updating the filter pointer. This is not
what the comment states.

As we always expect the pointer to point to NULL, if it is not, trigger a
WARN_ON(), set it to NULL, and then continue the path as the rest will work
as the comment states. Also update the comment to state it must point to
NULL.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agotracing: Avoid string overflow
Arnd Bergmann [Wed, 28 Mar 2018 14:09:10 +0000 (16:09 +0200)]
tracing: Avoid string overflow

'err' is used as a NUL-terminated string, but using strncpy() with the length
equal to the buffer size may result in lack of the termination:

kernel/trace/trace_events_hist.c: In function 'hist_err_event':
kernel/trace/trace_events_hist.c:396:3: error: 'strncpy' specified bound 256 equals destination size [-Werror=stringop-truncation]
   strncpy(err, var, MAX_FILTER_STR_VAL);

This changes it to use the safer strscpy() instead.

Link: http://lkml.kernel.org/r/20180328140920.2842153-1-arnd@arndb.de
Cc: stable@vger.kernel.org
Fixes: f404da6e1d46 ("tracing: Add 'last error' error facility for hist triggers")
Acked-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agonet/smc: fix up merge error with poll changes
Linus Torvalds [Tue, 3 Jul 2018 16:53:43 +0000 (09:53 -0700)]
net/smc: fix up merge error with poll changes

My networking merge (commit 4e33d7d47943: "Pull networking fixes from
David Miller") got the poll() handling conflict wrong for af_smc.

The conflict between my a11e1d432b51 ("Revert changes to convert to
->poll_mask() and aio IOCB_CMD_POLL") and Ursula Braun's 24ac3a08e658
("net/smc: rebuild nonblocking connect") should have left the call to
sock_poll_wait() in place, just without the socket lock release/retake.

And I really should have realized that.  But happily, I at least asked
Ursula to double-check the merge, and she set me right.

This also fixes an incidental whitespace issue nearby that annoyed me
while looking at this.

Pointed-out-by: Ursula Braun <ubraun@linux.ibm.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoPM / Domains: Don't power on at attach for the multi PM domain case
Ulf Hansson [Fri, 29 Jun 2018 09:15:37 +0000 (11:15 +0200)]
PM / Domains: Don't power on at attach for the multi PM domain case

There are no legacy behavior in drivers to consider while attaching a
device to genpd - for the multiple PM domain case.

For that reason, let's instead require the driver to runtime resume the
device, via calling pm_runtime_get_sync() for example, when it needs to
power on the corresponding PM domain.

This allows us to improve the situation during attach. Instead of always
power on the PM domain, which may be unnecessary, let's leave it in its
current state. Additionally, to avoid the PM domain to stay powered on,
let's schedule a power off work.

Fixes: 3c095f32a92b (PM / Domains: Add support for multi PM domains ...)
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
5 years agoloop: Add LOOP_SET_BLOCK_SIZE in compat ioctl
Evan Green [Mon, 2 Jul 2018 23:03:46 +0000 (16:03 -0700)]
loop: Add LOOP_SET_BLOCK_SIZE in compat ioctl

This change adds LOOP_SET_BLOCK_SIZE as one of the supported ioctls
in lo_compat_ioctl. It only takes an unsigned long argument, and
in practice a 32-bit value works fine.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Evan Green <evgreen@chromium.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
5 years agoMerge tag 'gvt-fixes-2018-07-03' of https://github.com/intel/gvt-linux into drm-intel...
Jani Nikula [Tue, 3 Jul 2018 11:57:43 +0000 (14:57 +0300)]
Merge tag 'gvt-fixes-2018-07-03' of https://github.com/intel/gvt-linux into drm-intel-fixes

gvt-fixes-2018-07-03

- replace virtual transcoder mode as DVI to fix guest warning (Xiaolin)
- fix partial GGTT entry write (Yan)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180703061139.GQ1267@zhen-hp.sh.intel.com
5 years agodrm/i915: Try GGTT mmapping whole object as partial
Chris Wilson [Sat, 30 Jun 2018 09:05:09 +0000 (10:05 +0100)]
drm/i915: Try GGTT mmapping whole object as partial

If the whole object is already pinned by HW for use as scanout, we will
fail to move it to the mappable region and so must resort to using a
partial VMA covering the whole object.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104513
Fixes: aa136d9d72c2 ("drm/i915: Convert partial ggtt vma to full ggtt if it spans the entire object")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Matthew Auld <matthew.william.auld@gmail.com>
Reviewed-by: Matthew Auld <matthew.william.auld@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180630090509.469-1-chris@chris-wilson.co.uk
(cherry picked from commit 7e7367d3bc6cf27dd7e007e7897fcebfeff1ee8b)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
5 years agox86/paravirt: Make native_save_fl() extern inline
Nick Desaulniers [Thu, 21 Jun 2018 16:23:24 +0000 (09:23 -0700)]
x86/paravirt: Make native_save_fl() extern inline

native_save_fl() is marked static inline, but by using it as
a function pointer in arch/x86/kernel/paravirt.c, it MUST be outlined.

paravirt's use of native_save_fl() also requires that no GPRs other than
%rax are clobbered.

Compilers have different heuristics which they use to emit stack guard
code, the emittance of which can break paravirt's callee saved assumption
by clobbering %rcx.

Marking a function definition extern inline means that if this version
cannot be inlined, then the out-of-line version will be preferred. By
having the out-of-line version be implemented in assembly, it cannot be
instrumented with a stack protector, which might violate custom calling
conventions that code like paravirt rely on.

The semantics of extern inline has changed since gnu89. This means that
folks using GCC versions >= 5.1 may see symbol redefinition errors at
link time for subdirs that override KBUILD_CFLAGS (making the C standard
used implicit) regardless of this patch. This has been cleaned up
earlier in the patch set, but is left as a note in the commit message
for future travelers.

Reports:
 https://lkml.org/lkml/2018/5/7/534
 https://github.com/ClangBuiltLinux/linux/issues/16

Discussion:
 https://bugs.llvm.org/show_bug.cgi?id=37512
 https://lkml.org/lkml/2018/5/24/1371

Thanks to the many folks that participated in the discussion.

Debugged-by: Alistair Strachan <astrachan@google.com>
Debugged-by: Matthias Kaehlcke <mka@chromium.org>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: H. Peter Anvin <hpa@zytor.com>
Suggested-by: Tom Stellar <tstellar@redhat.com>
Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@redhat.com
Cc: akataria@vmware.com
Cc: akpm@linux-foundation.org
Cc: andrea.parri@amarulasolutions.com
Cc: ard.biesheuvel@linaro.org
Cc: aryabinin@virtuozzo.com
Cc: astrachan@google.com
Cc: boris.ostrovsky@oracle.com
Cc: brijesh.singh@amd.com
Cc: caoj.fnst@cn.fujitsu.com
Cc: geert@linux-m68k.org
Cc: ghackmann@google.com
Cc: gregkh@linuxfoundation.org
Cc: jan.kiszka@siemens.com
Cc: jarkko.sakkinen@linux.intel.com
Cc: joe@perches.com
Cc: jpoimboe@redhat.com
Cc: keescook@google.com
Cc: kirill.shutemov@linux.intel.com
Cc: kstewart@linuxfoundation.org
Cc: linux-efi@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org
Cc: manojgupta@google.com
Cc: mawilcox@microsoft.com
Cc: michal.lkml@markovi.net
Cc: mjg59@google.com
Cc: mka@chromium.org
Cc: pombredanne@nexb.com
Cc: rientjes@google.com
Cc: rostedt@goodmis.org
Cc: thomas.lendacky@amd.com
Cc: tweek@google.com
Cc: virtualization@lists.linux-foundation.org
Cc: will.deacon@arm.com
Cc: yamada.masahiro@socionext.com
Link: http://lkml.kernel.org/r/20180621162324.36656-4-ndesaulniers@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agox86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h>
H. Peter Anvin [Thu, 21 Jun 2018 16:23:23 +0000 (09:23 -0700)]
x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h>

i386 and x86-64 uses different registers for arguments; make them
available so we don't have to #ifdef in the actual code.

Native size and specified size (q, l, w, b) versions are provided.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com>
Acked-by: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@redhat.com
Cc: akataria@vmware.com
Cc: akpm@linux-foundation.org
Cc: andrea.parri@amarulasolutions.com
Cc: ard.biesheuvel@linaro.org
Cc: arnd@arndb.de
Cc: aryabinin@virtuozzo.com
Cc: astrachan@google.com
Cc: boris.ostrovsky@oracle.com
Cc: brijesh.singh@amd.com
Cc: caoj.fnst@cn.fujitsu.com
Cc: geert@linux-m68k.org
Cc: ghackmann@google.com
Cc: gregkh@linuxfoundation.org
Cc: jan.kiszka@siemens.com
Cc: jarkko.sakkinen@linux.intel.com
Cc: joe@perches.com
Cc: jpoimboe@redhat.com
Cc: keescook@google.com
Cc: kirill.shutemov@linux.intel.com
Cc: kstewart@linuxfoundation.org
Cc: linux-efi@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org
Cc: manojgupta@google.com
Cc: mawilcox@microsoft.com
Cc: michal.lkml@markovi.net
Cc: mjg59@google.com
Cc: mka@chromium.org
Cc: pombredanne@nexb.com
Cc: rientjes@google.com
Cc: rostedt@goodmis.org
Cc: thomas.lendacky@amd.com
Cc: tstellar@redhat.com
Cc: tweek@google.com
Cc: virtualization@lists.linux-foundation.org
Cc: will.deacon@arm.com
Cc: yamada.masahiro@socionext.com
Link: http://lkml.kernel.org/r/20180621162324.36656-3-ndesaulniers@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agocompiler-gcc.h: Add __attribute__((gnu_inline)) to all inline declarations
Nick Desaulniers [Thu, 21 Jun 2018 16:23:22 +0000 (09:23 -0700)]
compiler-gcc.h: Add __attribute__((gnu_inline)) to all inline declarations

Functions marked extern inline do not emit an externally visible
function when the gnu89 C standard is used. Some KBUILD Makefiles
overwrite KBUILD_CFLAGS. This is an issue for GCC 5.1+ users as without
an explicit C standard specified, the default is gnu11. Since c99, the
semantics of extern inline have changed such that an externally visible
function is always emitted. This can lead to multiple definition errors
of extern inline functions at link time of compilation units whose build
files have removed an explicit C standard compiler flag for users of GCC
5.1+ or Clang.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: H. Peter Anvin <hpa@zytor.com>
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@redhat.com
Cc: akataria@vmware.com
Cc: akpm@linux-foundation.org
Cc: andrea.parri@amarulasolutions.com
Cc: ard.biesheuvel@linaro.org
Cc: aryabinin@virtuozzo.com
Cc: astrachan@google.com
Cc: boris.ostrovsky@oracle.com
Cc: brijesh.singh@amd.com
Cc: caoj.fnst@cn.fujitsu.com
Cc: geert@linux-m68k.org
Cc: ghackmann@google.com
Cc: gregkh@linuxfoundation.org
Cc: jan.kiszka@siemens.com
Cc: jarkko.sakkinen@linux.intel.com
Cc: jpoimboe@redhat.com
Cc: keescook@google.com
Cc: kirill.shutemov@linux.intel.com
Cc: kstewart@linuxfoundation.org
Cc: linux-efi@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org
Cc: manojgupta@google.com
Cc: mawilcox@microsoft.com
Cc: michal.lkml@markovi.net
Cc: mjg59@google.com
Cc: mka@chromium.org
Cc: pombredanne@nexb.com
Cc: rientjes@google.com
Cc: rostedt@goodmis.org
Cc: sedat.dilek@gmail.com
Cc: thomas.lendacky@amd.com
Cc: tstellar@redhat.com
Cc: tweek@google.com
Cc: virtualization@lists.linux-foundation.org
Cc: will.deacon@arm.com
Cc: yamada.masahiro@socionext.com
Link: http://lkml.kernel.org/r/20180621162324.36656-2-ndesaulniers@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agox86/bugs: Fix the AMD SSBD usage of the SPEC_CTRL MSR
Tom Lendacky [Mon, 2 Jul 2018 21:36:02 +0000 (16:36 -0500)]
x86/bugs: Fix the AMD SSBD usage of the SPEC_CTRL MSR

On AMD, the presence of the MSR_SPEC_CTRL feature does not imply that the
SSBD mitigation support should use the SPEC_CTRL MSR. Other features could
have caused the MSR_SPEC_CTRL feature to be set, while a different SSBD
mitigation option is in place.

Update the SSBD support to check for the actual SSBD features that will
use the SPEC_CTRL MSR.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 6ac2f49edb1e ("x86/bugs: Add AMD's SPEC_CTRL MSR usage")
Link: http://lkml.kernel.org/r/20180702213602.29202.33151.stgit@tlendack-t1.amdoffice.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agox86/bugs: Update when to check for the LS_CFG SSBD mitigation
Tom Lendacky [Mon, 2 Jul 2018 21:35:53 +0000 (16:35 -0500)]
x86/bugs: Update when to check for the LS_CFG SSBD mitigation

If either the X86_FEATURE_AMD_SSBD or X86_FEATURE_VIRT_SSBD features are
present, then there is no need to perform the check for the LS_CFG SSBD
mitigation support.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180702213553.29202.21089.stgit@tlendack-t1.amdoffice.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agox86/mm/32: Initialize the CR4 shadow before __flush_tlb_all()
Zhenzhong Duan [Tue, 3 Jul 2018 06:49:54 +0000 (23:49 -0700)]
x86/mm/32: Initialize the CR4 shadow before __flush_tlb_all()

On 32-bit kernels, __flush_tlb_all() may have read the CR4 shadow before the
initialization of CR4 shadow in cpu_init().

Fix it by adding an explicit cr4_init_shadow() call into start_secondary()
which is the first function called on non-boot SMP CPUs - ahead of the
__flush_tlb_all() call.

( This is somewhat of a layering violation, but start_secondary() does
  CR4 bootstrap in the PCID case anyway. )

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: http://lkml.kernel.org/r/b07b6ae9-4b57-4b40-b9bc-50c2c67f1d91@default
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agokthread, sched/core: Fix kthread_parkme() (again...)
Peter Zijlstra [Thu, 7 Jun 2018 09:45:49 +0000 (11:45 +0200)]
kthread, sched/core: Fix kthread_parkme() (again...)

Gaurav reports that commit:

  85f1abe0019f ("kthread, sched/wait: Fix kthread_parkme() completion issue")

isn't working for him. Because of the following race:

> controller Thread                               CPUHP Thread
> takedown_cpu
> kthread_park
> kthread_parkme
> Set KTHREAD_SHOULD_PARK
>                                                 smpboot_thread_fn
>                                                 set Task interruptible
>
>
> wake_up_process
>  if (!(p->state & state))
>                 goto out;
>
>                                                 Kthread_parkme
>                                                 SET TASK_PARKED
>                                                 schedule
>                                                 raw_spin_lock(&rq->lock)
> ttwu_remote
> waiting for __task_rq_lock
>                                                 context_switch
>
>                                                 finish_lock_switch
>
>
>
>                                                 Case TASK_PARKED
>                                                 kthread_park_complete
>
>
> SET Running

Furthermore, Oleg noticed that the whole scheduler TASK_PARKED
handling is buggered because the TASK_DEAD thing is done with
preemption disabled, the current code can still complete early on
preemption :/

So basically revert that earlier fix and go with a variant of the
alternative mentioned in the commit. Promote TASK_PARKED to special
state to avoid the store-store issue on task->state leading to the
WARN in kthread_unpark() -> __kthread_bind().

But in addition, add wait_task_inactive() to kthread_park() to ensure
the task really is PARKED when we return from kthread_park(). This
avoids the whole kthread still gets migrated nonsense -- although it
would be really good to get this done differently.

Reported-by: Gaurav Kohli <gkohli@codeaurora.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 85f1abe0019f ("kthread, sched/wait: Fix kthread_parkme() completion issue")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agosched/util_est: Fix util_est_dequeue() for throttled cfs_rq
Vincent Guittot [Thu, 14 Jun 2018 10:33:00 +0000 (12:33 +0200)]
sched/util_est: Fix util_est_dequeue() for throttled cfs_rq

When a cfs_rq is throttled, parent cfs_rq->nr_running is decreased and
everything happens at cfs_rq level. Currently util_est stays unchanged
in such case and it keeps accounting the utilization of throttled tasks.
This can somewhat make sense as we don't dequeue tasks but only throttled
cfs_rq.

If a task of another group is enqueued/dequeued and root cfs_rq becomes
idle during the dequeue, util_est will be cleared whereas it was
accounting util_est of throttled tasks before. So the behavior of util_est
is not always the same regarding throttled tasks and depends of side
activity. Furthermore, util_est will not be updated when the cfs_rq is
unthrottled as everything happens at cfs_rq level. Main results is that
util_est will stay null whereas we now have running tasks. We have to wait
for the next dequeue/enqueue of the previously throttled tasks to get an
up to date util_est.

Remove the assumption that cfs_rq's estimated utilization of a CPU is 0
if there is no running task so the util_est of a task remains until the
latter is dequeued even if its cfs_rq has been throttled.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 7f65ea42eb00 ("sched/fair: Add util_est on top of PELT")
Link: http://lkml.kernel.org/r/1528972380-16268-1-git-send-email-vincent.guittot@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agosched/fair: Advance global expiration when period timer is restarted
Xunlei Pang [Wed, 20 Jun 2018 10:18:34 +0000 (18:18 +0800)]
sched/fair: Advance global expiration when period timer is restarted

When period gets restarted after some idle time, start_cfs_bandwidth()
doesn't update the expiration information, expire_cfs_rq_runtime() will
see cfs_rq->runtime_expires smaller than rq clock and go to the clock
drift logic, wasting needless CPU cycles on the scheduler hot path.

Update the global expiration in start_cfs_bandwidth() to avoid frequent
expire_cfs_rq_runtime() calls once a new period begins.

Signed-off-by: Xunlei Pang <xlpang@linux.alibaba.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ben Segall <bsegall@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180620101834.24455-2-xlpang@linux.alibaba.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agosched/fair: Fix bandwidth timer clock drift condition
Xunlei Pang [Wed, 20 Jun 2018 10:18:33 +0000 (18:18 +0800)]
sched/fair: Fix bandwidth timer clock drift condition

I noticed that cgroup task groups constantly get throttled even
if they have low CPU usage, this causes some jitters on the response
time to some of our business containers when enabling CPU quotas.

It's very simple to reproduce:

  mkdir /sys/fs/cgroup/cpu/test
  cd /sys/fs/cgroup/cpu/test
  echo 100000 > cpu.cfs_quota_us
  echo $$ > tasks

then repeat:

  cat cpu.stat | grep nr_throttled  # nr_throttled will increase steadily

After some analysis, we found that cfs_rq::runtime_remaining will
be cleared by expire_cfs_rq_runtime() due to two equal but stale
"cfs_{b|q}->runtime_expires" after period timer is re-armed.

The current condition to judge clock drift in expire_cfs_rq_runtime()
is wrong, the two runtime_expires are actually the same when clock
drift happens, so this condtion can never hit. The orginal design was
correctly done by this commit:

  a9cf55b28610 ("sched: Expire invalid runtime")

... but was changed to be the current implementation due to its locking bug.

This patch introduces another way, it adds a new field in both structures
cfs_rq and cfs_bandwidth to record the expiration update sequence, and
uses them to figure out if clock drift happens (true if they are equal).

Signed-off-by: Xunlei Pang <xlpang@linux.alibaba.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ben Segall <bsegall@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 51f2176d74ac ("sched/fair: Fix unlocked reads of some cfs_b->quota/period")
Link: http://lkml.kernel.org/r/20180620101834.24455-1-xlpang@linux.alibaba.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agosched/rt: Fix call to cpufreq_update_util()
Vincent Guittot [Tue, 26 Jun 2018 13:53:22 +0000 (15:53 +0200)]
sched/rt: Fix call to cpufreq_update_util()

With commit:

  8f111bc357aa ("cpufreq/schedutil: Rewrite CPUFREQ_RT support")

the schedutil governor uses rq->rt.rt_nr_running to detect whether an
RT task is currently running on the CPU and to set frequency to max
if necessary.

cpufreq_update_util() is called in enqueue/dequeue_top_rt_rq() but
rq->rt.rt_nr_running has not been updated yet when dequeue_top_rt_rq() is
called so schedutil still considers that an RT task is running when the
last task is dequeued. The update of rq->rt.rt_nr_running happens later
in dequeue_rt_stack().

In fact, we can take advantage of the sequence that the dequeue then
re-enqueue rt entities when a rt task is enqueued or dequeued;
As a result enqueue_top_rt_rq() is always called when a task is
enqueued or dequeued and also when groups are throttled or unthrottled.
The only place that not use enqueue_top_rt_rq() is when root rt_rq is
throttled.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: efault@gmx.de
Cc: juri.lelli@redhat.com
Cc: patrick.bellasi@arm.com
Cc: viresh.kumar@linaro.org
Fixes: 8f111bc357aa ('cpufreq/schedutil: Rewrite CPUFREQ_RT support')
Link: http://lkml.kernel.org/r/1530021202-21695-1-git-send-email-vincent.guittot@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agosched/nohz: Skip remote tick on idle task entirely
Frederic Weisbecker [Thu, 28 Jun 2018 16:29:41 +0000 (18:29 +0200)]
sched/nohz: Skip remote tick on idle task entirely

Some people have reported that the warning in sched_tick_remote()
occasionally triggers, especially in favour of some RCU-Torture
pressure:

WARNING: CPU: 11 PID: 906 at kernel/sched/core.c:3138 sched_tick_remote+0xb6/0xc0
Modules linked in:
CPU: 11 PID: 906 Comm: kworker/u32:3 Not tainted 4.18.0-rc2+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
Workqueue: events_unbound sched_tick_remote
RIP: 0010:sched_tick_remote+0xb6/0xc0
Code: e8 0f 06 b8 00 c6 03 00 fb eb 9d 8b 43 04 85 c0 75 8d 48 8b 83 e0 0a 00 00 48 85 c0 75 81 eb 88 48 89 df e8 bc fe ff ff eb aa <0f> 0b eb
+c5 66 0f 1f 44 00 00 bf 17 00 00 00 e8 b6 2e fe ff 0f b6
Call Trace:
 process_one_work+0x1df/0x3b0
 worker_thread+0x44/0x3d0
 kthread+0xf3/0x130
 ? set_worker_desc+0xb0/0xb0
 ? kthread_create_worker_on_cpu+0x70/0x70
 ret_from_fork+0x35/0x40

This happens when the remote tick applies on an idle task. Usually the
idle_cpu() check avoids that, but it is performed before we lock the
runqueue and it is therefore racy. It was intended to be that way in
order to prevent from useless runqueue locks since idle task tick
callback is a no-op.

Now if the racy check slips out of our hands and we end up remotely
ticking an idle task, the empty task_tick_idle() is harmless. Still
it won't pass the WARN_ON_ONCE() test that ensures rq_clock_task() is
not too far from curr->se.exec_start because update_curr_idle() doesn't
update the exec_start value like other scheduler policies. Hence the
reported false positive.

So let's have another check, while the rq is locked, to make sure we
don't remote tick on an idle task. The lockless idle_cpu() still applies
to avoid unecessary rq lock contention.

Reported-by: Jacek Tomaka <jacekt@dug.com>
Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reported-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1530203381-31234-1-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agoext4: check superblock mapped prior to committing
Jon Derrick [Mon, 2 Jul 2018 22:45:18 +0000 (18:45 -0400)]
ext4: check superblock mapped prior to committing

This patch attempts to close a hole leading to a BUG seen with hot
removals during writes [1].

A block device (NVME namespace in this test case) is formatted to EXT4
without partitions. It's mounted and write I/O is run to a file, then
the device is hot removed from the slot. The superblock attempts to be
written to the drive which is no longer present.

The typical chain of events leading to the BUG:
ext4_commit_super()
  __sync_dirty_buffer()
    submit_bh()
      submit_bh_wbc()
        BUG_ON(!buffer_mapped(bh));

This fix checks for the superblock's buffer head being mapped prior to
syncing.

[1] https://www.spinics.net/lists/linux-ext4/msg56527.html

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
5 years agoACPI / PPTT: use ACPI ID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set
Sudeep Holla [Fri, 29 Jun 2018 16:17:57 +0000 (17:17 +0100)]
ACPI / PPTT: use ACPI ID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set

Currently, we use the ACPI processor ID only for the leaf/processor nodes
as the specification states it must match the value of the ACPI processor
ID field in the processor’s entry in the MADT.

However, if a PPTT structure represents a processors group, it
matches a processor container UID in the namespace and the
ACPI_PPTT_ACPI_PROCESSOR_ID_VALID flag indicates whether the
ACPI processor ID is valid.

Let's use UID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set to be
consistent instead of using table offset as it's currently done for
non-leaf nodes.

Fixes: 2bd00bcd73e5 (ACPI/PPTT: Add Processor Properties Topology Table parsing)
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Jeremy Linton <jeremy.linton@arm.com>
[ rjw: Changelog (minor) ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
5 years agoMerge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
Linus Torvalds [Mon, 2 Jul 2018 19:40:59 +0000 (12:40 -0700)]
Merge branch 'for-next' of git://git./linux/kernel/git/shli/md

Pull MD fixes from Shaohua Li:
 "Two small fixes for MD:

   - an error handling fix from me

   - a recover bug fix for raid10 from BingJing"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  md/raid10: fix that replacement cannot complete recovery after reassemble
  MD: cleanup resources in failure

5 years agoMerge tag 'for-linus' of git://github.com/stffrdhrn/linux
Linus Torvalds [Mon, 2 Jul 2018 19:38:14 +0000 (12:38 -0700)]
Merge tag 'for-linus' of git://github.com/stffrdhrn/linux

Pull OpenRISC fixes from Stafford Horne:
 "Two fixes for issues which were breaking OpenRISC boot:

   - Fix bug in __pte_free_tlb() exposed in 4.18 by Matthew Wilcox's
     page table flag addition.

   - Fix issue booting on real hardware if delay slot detection
     emulation is disabled"

* tag 'for-linus' of git://github.com/stffrdhrn/linux:
  openrisc: entry: Fix delay slot exception detection
  openrisc: Call destructor during __pte_free_tlb

5 years agodrm/amdgpu/pm: fix display count in non-DC path
Alex Deucher [Thu, 28 Jun 2018 17:44:25 +0000 (12:44 -0500)]
drm/amdgpu/pm: fix display count in non-DC path

new_active_crtcs is a bitmask, new_active_crtc_count is the
actual count.

Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
5 years agodrm/amdgpu: fix swapped emit_ib_size in vce3
Alex Deucher [Thu, 28 Jun 2018 17:38:53 +0000 (12:38 -0500)]
drm/amdgpu: fix swapped emit_ib_size in vce3

The phys and vm versions had the values swapped.

Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Mon, 2 Jul 2018 18:18:28 +0000 (11:18 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Verify netlink attributes properly in nf_queue, from Eric Dumazet.

 2) Need to bump memory lock rlimit for test_sockmap bpf test, from
    Yonghong Song.

 3) Fix VLAN handling in lan78xx driver, from Dave Stevenson.

 4) Fix uninitialized read in nf_log, from Jann Horn.

 5) Fix raw command length parsing in mlx5, from Alex Vesker.

 6) Cleanup loopback RDS connections upon netns deletion, from Sowmini
    Varadhan.

 7) Fix regressions in FIB rule matching during create, from Jason A.
    Donenfeld and Roopa Prabhu.

 8) Fix mpls ether type detection in nfp, from Pieter Jansen van Vuuren.

 9) More bpfilter build fixes/adjustments from Masahiro Yamada.

10) Fix XDP_{TX,REDIRECT} flushing in various drivers, from Jesper
    Dangaard Brouer.

11) fib_tests.sh file permissions were broken, from Shuah Khan.

12) Make sure BH/preemption is disabled in data path of mac80211, from
    Denis Kenzior.

13) Don't ignore nla_parse_nested() return values in nl80211, from
    Johannes berg.

14) Properly account sock objects ot kmemcg, from Shakeel Butt.

15) Adjustments to setting bpf program permissions to read-only, from
    Daniel Borkmann.

16) TCP Fast Open key endianness was broken, it always took on the host
    endiannness. Whoops. Explicitly make it little endian. From Yuching
    Cheng.

17) Fix prefix route setting for link local addresses in ipv6, from
    David Ahern.

18) Potential Spectre v1 in zatm driver, from Gustavo A. R. Silva.

19) Various bpf sockmap fixes, from John Fastabend.

20) Use after free for GRO with ESP, from Sabrina Dubroca.

21) Passing bogus flags to crypto_alloc_shash() in ipv6 SR code, from
    Eric Biggers.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (87 commits)
  qede: Adverstise software timestamp caps when PHC is not available.
  qed: Fix use of incorrect size in memcpy call.
  qed: Fix setting of incorrect eswitch mode.
  qed: Limit msix vectors in kdump kernel to the minimum required count.
  ipvlan: call dev_change_flags when ipvlan mode is reset
  ipv6: sr: fix passing wrong flags to crypto_alloc_shash()
  net: fix use-after-free in GRO with ESP
  tcp: prevent bogus FRTO undos with non-SACK flows
  bpf: sockhash, add release routine
  bpf: sockhash fix omitted bucket lock in sock_close
  bpf: sockmap, fix smap_list_map_remove when psock is in many maps
  bpf: sockmap, fix crash when ipv6 sock is added
  net: fib_rules: bring back rule_exists to match rule during add
  hv_netvsc: split sub-channel setup into async and sync
  net: use dev_change_tx_queue_len() for SIOCSIFTXQLEN
  atm: zatm: Fix potential Spectre v1
  s390/qeth: consistently re-enable device features
  s390/qeth: don't clobber buffer on async TX completion
  s390/qeth: avoid using is_multicast_ether_addr_64bits on (u8 *)[6]
  s390/qeth: fix race when setting MAC address
  ...