1. 14 Jan, 2017 12 commits
  2. 13 Jan, 2017 3 commits
  3. 12 Jan, 2017 18 commits
    • Jike Song's avatar
      vfio iommu type1: fix the testing of capability for remote task · d1b333d1
      Jike Song authored
      Before the mdev enhancement type1 iommu used capable() to test the
      capability of current task; in the course of mdev development a
      new requirement, testing for another task other than current, was
      raised.  ns_capable() was used for this purpose, however it still
      tests current, the only difference is, in a specified namespace.
      
      Fix it by using has_capability() instead, which tests the cap for
      specified task in init_user_ns, the same namespace as capable().
      
      Cc: Gerd Hoffmann <kraxel@redhat.com>
      Signed-off-by: default avatarJike Song <jike.song@intel.com>
      Reviewed-by: default avatarJames Morris <james.l.morris@oracle.com>
      Reviewed-by: default avatarKirti Wankhede <kwankhede@nvidia.com>
      Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
      d1b333d1
    • Linus Torvalds's avatar
      Merge tag 'sound-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 557ed56c
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "This time we got a few more fixes than the previous rc's, and most of
        commits were about ASoC.
      
        The only significant change in the core side is the regression fix wrt
        the aux device list handling, and all the rest are driver-specific
        small / trivial fixes"
      
      * tag 'sound-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: usb-audio: Add a quirk for Plantronics BT600
        ASoC: rt5645: set sel_i2s_pre_div1 to 2
        ASoC: dpcm: Avoid putting stream state to STOP when FE stream is paused
        ASoC: Intel: Skylake: Release FW ctx in cleanup
        ASoC: Intel: bytcr-rt5640: fix settings in internal clock mode
        ASoC: fsl_ssi: set fifo watermark to more reliable value
        ASoC: nau8825: fix invalid configuration in Pre-Scalar of FLL
        ASoC: nau8825: correct the function name of register
        ASoC: Intel: Skylake: Fix to fail safely if module not available in path
        ASoC: tlv320aic3x: Mark the RESET register as volatile
        ASoC: Fix binding and probing of auxiliary components
        ASoC: wm_adsp: Don't overrun firmware file buffer when reading region data
        ASoC: Intel: bytcr_rt5640: fallback mechanism if MCLK is not enabled
        ASoC: hdmi-codec: use unsigned type to structure members with bit-field
        ASoC: topology: kfree kcontrol->private_value before freeing kcontrol
        ASoC: rsnd: don't double free kctrl
        ASoC: dwc: Fix PIO mode initialization
      557ed56c
    • Linus Torvalds's avatar
      Merge tag 'xfs-for-linus-4.10-rc4-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · e28ac1fc
      Linus Torvalds authored
      Pull xfs fixes from Darrick Wong:
       "As promised last week, here's some stability fixes from Christoph and
        Jan Kara:
      
         - fix free space request handling when low on disk space
      
         - remove redundant log failure error messages
      
         - free truncated dirty pages instead of letting them build up
           forever"
      
      * tag 'xfs-for-linus-4.10-rc4-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
        xfs: Timely free truncated dirty pages
        xfs: don't print warnings when xfs_log_force fails
        xfs: don't rely on ->total in xfs_alloc_space_available
        xfs: adjust allocation length in xfs_alloc_space_available
        xfs: fix bogus minleft manipulations
        xfs: bump up reserved blocks in xfs_alloc_set_aside
      e28ac1fc
    • Linus Torvalds's avatar
      Merge tag 'rproc-v4.10-fixes' of git://github.com/andersson/remoteproc · 9ca277eb
      Linus Torvalds authored
      Pull remoteproc fixes from Bjorn Andersson:
       "This fixes two regressions that have been reported to be introduced in
        v4.10-rc1.
      
         - correct an incorrect usage of the kref api
      
         - revert the change to make the resource table read-only. As the
           space each vdev resource is used as virtio device config space it
           must be shared with the remote"
      
      * tag 'rproc-v4.10-fixes' of git://github.com/andersson/remoteproc:
        Revert "remoteproc: Merge table_ptr and cached_table pointers"
        remoteproc: fix vdev reference management
      9ca277eb
    • Linus Torvalds's avatar
      Merge tag 'rpmsg-v4.10-fixes' of git://github.com/andersson/remoteproc · 1d865da7
      Linus Torvalds authored
      Pull rpmsg fixes from Bjorn Andersson:
       "This fixes a regression introduced in v4.10-rc1 that prohibits
        multiple channels with the same name but different endpoint addresses
        to be used"
      
      * tag 'rpmsg-v4.10-fixes' of git://github.com/andersson/remoteproc:
        rpmsg: virtio_rpmsg_bus: fix channel creation
      1d865da7
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid · 95ce1313
      Linus Torvalds authored
      Pull HID fixes from Jiri Kosina:
      
       - device descriptor length validation fix to hid-cypress driver from
         Greg
      
       - introduction of a short delay into i2c-hid, which is not really
         mandated by the spec, but fixes Asus Touchpads
      
       - Petzl USB connectable flashlight quirk from myself
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
        HID: i2c-hid: Add sleep between POWER ON and RESET
        HID: hid-cypress: validate length of report
        HID: ignore Petzl USB headlamp
      95ce1313
    • Linus Torvalds's avatar
      Merge branch 'scsi-target-for-v4.10' of... · cb38b453
      Linus Torvalds authored
      Merge branch 'scsi-target-for-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bvanassche/linux
      
      Pull scsi target fixes from Bart Van Assche:
      
       - a series of bug fixes for the XCOPY implementation from David
         Disseldorp
      
       - one bug fix for the ibmvscsis driver, a driver that is used for
         communication between partitions on IBM POWER systems.
      
      * 'scsi-target-for-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bvanassche/linux:
        ibmvscsis: Fix srp_transfer_data fail return code
        target: support XCOPY requests without parameters
        target: check for XCOPY parameter truncation
        target: use XCOPY segment descriptor CSCD IDs
        target: check XCOPY segment descriptor CSCD IDs
        target: simplify XCOPY wwn->se_dev lookup helper
        target: return UNSUPPORTED TARGET/SEGMENT DESC TYPE CODE sense
        target: bounds check XCOPY total descriptor list length
        target: bounds check XCOPY segment descriptor list
        target: use XCOPY TOO MANY TARGET DESCRIPTORS sense
        target: add XCOPY target/segment desc sense codes
      cb38b453
    • Geng, Jichao's avatar
      ceph: fix get_oldest_context() · 84fcc2d2
      Geng, Jichao authored
      For no snapshot case, we should use ci->truncate_{seq,size}.
      
      Fixes: 5f743e45 ("ceph: record truncate size/seq for snap data writeback")
      Signed-off-by: default avatarGeng, Jichao <geng.jichao@h3c.com>
      Signed-off-by: default avatarYan, Zheng <zyan@redhat.com>
      84fcc2d2
    • Yan, Zheng's avatar
      ceph: fix mds cluster availability check · cc8e8342
      Yan, Zheng authored
      We should apply the check after getting the initial mdsmap.
      
      Fixes: e9e427f0 ("ceph: check availability of mds cluster on mount")
      Link: http://tracker.ceph.com/issues/18161Signed-off-by: default avatarYan, Zheng <zyan@redhat.com>
      cc8e8342
    • Linus Torvalds's avatar
      Merge tag 'md/4.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md · 607ae5f2
      Linus Torvalds authored
      Pull md fixes from Shaohua Li:
       "Basically one fix for raid5 cache which is merged in this cycle,
        others are trival fixes"
      
      * tag 'md/4.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
        md/raid5: Use correct IS_ERR() variation on pointer check
        md: cleanup mddev flag clear for takeover
        md/r5cache: fix spelling mistake on "recoverying"
        md/r5cache: assign conf->log before r5l_load_log()
        md/r5cache: simplify handling of sh->log_start in recovery
        md/raid5-cache: removes unnecessary write-through mode judgments
        md/raid10: Refactor raid10_make_request
        md/raid1: Refactor raid1_make_request
      607ae5f2
    • Ard Biesheuvel's avatar
      arm64: assembler: make adr_l work in modules under KASLR · 41c066f2
      Ard Biesheuvel authored
      When CONFIG_RANDOMIZE_MODULE_REGION_FULL=y, the offset between loaded
      modules and the core kernel may exceed 4 GB, putting symbols exported
      by the core kernel out of the reach of the ordinary adrp/add instruction
      pairs used to generate relative symbol references. So make the adr_l
      macro emit a movz/movk sequence instead when executing in module context.
      
      While at it, remove the pointless special case for the stack pointer.
      Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
      Acked-by: default avatarWill Deacon <will.deacon@arm.com>
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      41c066f2
    • Paolo Bonzini's avatar
      KVM: x86: fix emulation of "MOV SS, null selector" · 33ab9110
      Paolo Bonzini authored
      This is CVE-2017-2583.  On Intel this causes a failed vmentry because
      SS's type is neither 3 nor 7 (even though the manual says this check is
      only done for usable SS, and the dmesg splat says that SS is unusable!).
      On AMD it's worse: svm.c is confused and sets CPL to 0 in the vmcb.
      
      The fix fabricates a data segment descriptor when SS is set to a null
      selector, so that CPL and SS.DPL are set correctly in the VMCS/vmcb.
      Furthermore, only allow setting SS to a NULL selector if SS.RPL < 3;
      this in turn ensures CPL < 3 because RPL must be equal to CPL.
      
      Thanks to Andy Lutomirski and Willy Tarreau for help in analyzing
      the bug and deciphering the manuals.
      Reported-by: default avatarXiaohan Zhang <zhangxiaohan1@huawei.com>
      Fixes: 79d5b4c3
      Cc: stable@nongnu.org
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      33ab9110
    • Jike Song's avatar
      capability: export has_capability · 19c816e8
      Jike Song authored
      has_capability() is sometimes needed by modules to test capability
      for specified task other than current, so export it.
      
      Cc: Kirti Wankhede <kwankhede@nvidia.com>
      Signed-off-by: default avatarJike Song <jike.song@intel.com>
      Acked-by: default avatarSerge Hallyn <serge@hallyn.com>
      Acked-by: default avatarJames Morris <james.l.morris@oracle.com>
      Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
      19c816e8
    • Wanpeng Li's avatar
      KVM: x86: fix NULL deref in vcpu_scan_ioapic · 546d87e5
      Wanpeng Li authored
      Reported by syzkaller:
      
          BUG: unable to handle kernel NULL pointer dereference at 00000000000001b0
          IP: _raw_spin_lock+0xc/0x30
          PGD 3e28eb067
          PUD 3f0ac6067
          PMD 0
          Oops: 0002 [#1] SMP
          CPU: 0 PID: 2431 Comm: test Tainted: G           OE   4.10.0-rc1+ #3
          Call Trace:
           ? kvm_ioapic_scan_entry+0x3e/0x110 [kvm]
           kvm_arch_vcpu_ioctl_run+0x10a8/0x15f0 [kvm]
           ? pick_next_task_fair+0xe1/0x4e0
           ? kvm_arch_vcpu_load+0xea/0x260 [kvm]
           kvm_vcpu_ioctl+0x33a/0x600 [kvm]
           ? hrtimer_try_to_cancel+0x29/0x130
           ? do_nanosleep+0x97/0xf0
           do_vfs_ioctl+0xa1/0x5d0
           ? __hrtimer_init+0x90/0x90
           ? do_nanosleep+0x5b/0xf0
           SyS_ioctl+0x79/0x90
           do_syscall_64+0x6e/0x180
           entry_SYSCALL64_slow_path+0x25/0x25
          RIP: _raw_spin_lock+0xc/0x30 RSP: ffffa43688973cc0
      
      The syzkaller folks reported a NULL pointer dereference due to
      ENABLE_CAP succeeding even without an irqchip.  The Hyper-V
      synthetic interrupt controller is activated, resulting in a
      wrong request to rescan the ioapic and a NULL pointer dereference.
      
          #include <sys/ioctl.h>
          #include <sys/mman.h>
          #include <sys/types.h>
          #include <linux/kvm.h>
          #include <pthread.h>
          #include <stddef.h>
          #include <stdint.h>
          #include <stdlib.h>
          #include <string.h>
          #include <unistd.h>
      
          #ifndef KVM_CAP_HYPERV_SYNIC
          #define KVM_CAP_HYPERV_SYNIC 123
          #endif
      
          void* thr(void* arg)
          {
      	struct kvm_enable_cap cap;
      	cap.flags = 0;
      	cap.cap = KVM_CAP_HYPERV_SYNIC;
      	ioctl((long)arg, KVM_ENABLE_CAP, &cap);
      	return 0;
          }
      
          int main()
          {
      	void *host_mem = mmap(0, 0x1000, PROT_READ|PROT_WRITE,
      			MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
      	int kvmfd = open("/dev/kvm", 0);
      	int vmfd = ioctl(kvmfd, KVM_CREATE_VM, 0);
      	struct kvm_userspace_memory_region memreg;
      	memreg.slot = 0;
      	memreg.flags = 0;
      	memreg.guest_phys_addr = 0;
      	memreg.memory_size = 0x1000;
      	memreg.userspace_addr = (unsigned long)host_mem;
      	host_mem[0] = 0xf4;
      	ioctl(vmfd, KVM_SET_USER_MEMORY_REGION, &memreg);
      	int cpufd = ioctl(vmfd, KVM_CREATE_VCPU, 0);
      	struct kvm_sregs sregs;
      	ioctl(cpufd, KVM_GET_SREGS, &sregs);
      	sregs.cr0 = 0;
      	sregs.cr4 = 0;
      	sregs.efer = 0;
      	sregs.cs.selector = 0;
      	sregs.cs.base = 0;
      	ioctl(cpufd, KVM_SET_SREGS, &sregs);
      	struct kvm_regs regs = { .rflags = 2 };
      	ioctl(cpufd, KVM_SET_REGS, &regs);
      	ioctl(vmfd, KVM_CREATE_IRQCHIP, 0);
      	pthread_t th;
      	pthread_create(&th, 0, thr, (void*)(long)cpufd);
      	usleep(rand() % 10000);
      	ioctl(cpufd, KVM_RUN, 0);
      	pthread_join(th, 0);
      	return 0;
          }
      
      This patch fixes it by failing ENABLE_CAP if without an irqchip.
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Fixes: 5c919412 (kvm/x86: Hyper-V synthetic interrupt controller)
      Cc: stable@vger.kernel.org # 4.5+
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Radim Krčmář <rkrcmar@redhat.com>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Signed-off-by: default avatarWanpeng Li <wanpeng.li@hotmail.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      546d87e5
    • Wanpeng Li's avatar
      KVM: eventfd: fix NULL deref irqbypass consumer · 4f3dbdf4
      Wanpeng Li authored
      Reported syzkaller:
      
          BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
          IP: irq_bypass_unregister_consumer+0x9d/0xb70 [irqbypass]
          PGD 0
      
          Oops: 0002 [#1] SMP
          CPU: 1 PID: 125 Comm: kworker/1:1 Not tainted 4.9.0+ #1
          Workqueue: kvm-irqfd-cleanup irqfd_shutdown [kvm]
          task: ffff9bbe0dfbb900 task.stack: ffffb61802014000
          RIP: 0010:irq_bypass_unregister_consumer+0x9d/0xb70 [irqbypass]
          Call Trace:
           irqfd_shutdown+0x66/0xa0 [kvm]
           process_one_work+0x16b/0x480
           worker_thread+0x4b/0x500
           kthread+0x101/0x140
           ? process_one_work+0x480/0x480
           ? kthread_create_on_node+0x60/0x60
           ret_from_fork+0x25/0x30
          RIP: irq_bypass_unregister_consumer+0x9d/0xb70 [irqbypass] RSP: ffffb61802017e20
          CR2: 0000000000000008
      
      The syzkaller folks reported a NULL pointer dereference that due to
      unregister an consumer which fails registration before. The syzkaller
      creates two VMs w/ an equal eventfd occasionally. So the second VM
      fails to register an irqbypass consumer. It will make irqfd as inactive
      and queue an workqueue work to shutdown irqfd and unregister the irqbypass
      consumer when eventfd is closed. However, the second consumer has been
      initialized though it fails registration. So the token(same as the first
      VM's) is taken to unregister the consumer through the workqueue, the
      consumer of the first VM is found and unregistered, then NULL deref incurred
      in the path of deleting consumer from the consumers list.
      
      This patch fixes it by making irq_bypass_register/unregister_consumer()
      looks for the consumer entry based on consumer pointer itself instead of
      token matching.
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Suggested-by: default avatarAlex Williamson <alex.williamson@redhat.com>
      Cc: stable@vger.kernel.org
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Radim Krčmář <rkrcmar@redhat.com>
      Cc: Dmitry Vyukov <dvyukov@google.com>
      Cc: Alex Williamson <alex.williamson@redhat.com>
      Signed-off-by: default avatarWanpeng Li <wanpeng.li@hotmail.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      4f3dbdf4
    • Steve Rutherford's avatar
      KVM: x86: Introduce segmented_write_std · 129a72a0
      Steve Rutherford authored
      Introduces segemented_write_std.
      
      Switches from emulated reads/writes to standard read/writes in fxsave,
      fxrstor, sgdt, and sidt.  This fixes CVE-2017-2584, a longstanding
      kernel memory leak.
      
      Since commit 283c95d0 ("KVM: x86: emulate FXSAVE and FXRSTOR",
      2016-11-09), which is luckily not yet in any final release, this would
      also be an exploitable kernel memory *write*!
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Cc: stable@vger.kernel.org
      Fixes: 96051572
      Fixes: 283c95d0Suggested-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarSteve Rutherford <srutherford@google.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      129a72a0
    • David Matlack's avatar
      KVM: x86: flush pending lapic jump label updates on module unload · cef84c30
      David Matlack authored
      KVM's lapic emulation uses static_key_deferred (apic_{hw,sw}_disabled).
      These are implemented with delayed_work structs which can still be
      pending when the KVM module is unloaded. We've seen this cause kernel
      panics when the kvm_intel module is quickly reloaded.
      
      Use the new static_key_deferred_flush() API to flush pending updates on
      module unload.
      Signed-off-by: default avatarDavid Matlack <dmatlack@google.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      cef84c30
    • David Matlack's avatar
      jump_labels: API for flushing deferred jump label updates · b6416e61
      David Matlack authored
      Modules that use static_key_deferred need a way to synchronize with
      any delayed work that is still pending when the module is unloaded.
      Introduce static_key_deferred_flush() which flushes any pending
      jump label updates.
      Signed-off-by: default avatarDavid Matlack <dmatlack@google.com>
      Cc: stable@vger.kernel.org
      Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      b6416e61
  4. 11 Jan, 2017 7 commits
    • Brendan McGrath's avatar
      HID: i2c-hid: Add sleep between POWER ON and RESET · a89af4ab
      Brendan McGrath authored
      Support for the Asus Touchpad was recently added. It turns out this
      device can fail initialisation (and become unusable) when the RESET
      command is sent too soon after the POWER ON command.
      
      Unfortunately the i2c-hid specification does not specify the need for
      a delay between these two commands. But it was discovered the Windows
      driver has a 1ms delay.
      
      As a result, this patch modifies the i2c-hid module to add a sleep
      inbetween the POWER ON and RESET commands which lasts between 1ms and 5ms.
      
      See https://github.com/vlasenko/hid-asus-dkms/issues/24 for further
      details.
      Signed-off-by: default avatarBrendan McGrath <redmcg@redmandi.dyndns.org>
      Reviewed-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
      Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
      a89af4ab
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · ba836a6f
      Linus Torvalds authored
      Merge fixes from Andrew Morton:
       "27 fixes.
      
        There are three patches that aren't actually fixes. They're simple
        function renamings which are nice-to-have in mainline as ongoing net
        development depends on them."
      
      * akpm: (27 commits)
        timerfd: export defines to userspace
        mm/hugetlb.c: fix reservation race when freeing surplus pages
        mm/slab.c: fix SLAB freelist randomization duplicate entries
        zram: support BDI_CAP_STABLE_WRITES
        zram: revalidate disk under init_lock
        mm: support anonymous stable page
        mm: add documentation for page fragment APIs
        mm: rename __page_frag functions to __page_frag_cache, drop order from drain
        mm: rename __alloc_page_frag to page_frag_alloc and __free_page_frag to page_frag_free
        mm, memcg: fix the active list aging for lowmem requests when memcg is enabled
        mm: don't dereference struct page fields of invalid pages
        mailmap: add codeaurora.org names for nameless email commits
        signal: protect SIGNAL_UNKILLABLE from unintentional clearing.
        mm: pmd dirty emulation in page fault handler
        ipc/sem.c: fix incorrect sem_lock pairing
        lib/Kconfig.debug: fix frv build failure
        mm: get rid of __GFP_OTHER_NODE
        mm: fix remote numa hits statistics
        mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done}
        ocfs2: fix crash caused by stale lvb with fsdlm plugin
        ...
      ba836a6f
    • Dan Carpenter's avatar
      vfio-mdev: remove some dead code · 73da4268
      Dan Carpenter authored
      We set info.count to 1 in mtty_get_irq_info() so static checkers
      complain that, "Why do we have impossible conditions?"  The answer is
      that it seems to be left over dead code that can be safely removed.
      Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Reviewed-by: default avatarKirti Wankhede <kwankhede@nvidia.com>
      Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
      73da4268
    • Dan Carpenter's avatar
      vfio-mdev: buffer overflow in ioctl() · 5c677869
      Dan Carpenter authored
      This is a sample driver for documentation so the impact is probably
      pretty low.  But we should check that bar_index is valid so we
      don't write beyond the end of the mdev_state->region_info[] array.
      
      Fixes: 9d1a546c ("docs: Sample driver to demonstrate how to use Mediated device framework.")
      Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Reviewed-by: default avatarKirti Wankhede <kwankhede@nvidia.com>
      Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
      5c677869
    • Dan Carpenter's avatar
      vfio-mdev: return -EFAULT if copy_to_user() fails · 6ed0993a
      Dan Carpenter authored
      The copy_to_user() function returns the number of bytes which it wasn't
      able to copy but we want to return a negative error code.
      
      Fixes: 9d1a546c ("docs: Sample driver to demonstrate how to use Mediated device framework.")
      Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Reviewed-by: default avatarKirti Wankhede <kwankhede@nvidia.com>
      Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
      6ed0993a
    • Takashi Iwai's avatar
      Merge tag 'asoc-fix-v4.10-rc3' of... · 6cf4569c
      Takashi Iwai authored
      Merge tag 'asoc-fix-v4.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
      
      ASoC: Fixes for v4.10
      
      As well as the usual smattering of driver specific fixes collected since
      the merge window this has one particularly important fix to the core for
      handling of aux_devs which was broken during the merge window by some of
      the componentization refactoring.
      6cf4569c
    • Jan Kara's avatar
      xfs: Timely free truncated dirty pages · 0a417b8d
      Jan Kara authored
      Commit 99579cce "xfs: skip dirty pages in ->releasepage()" started
      to skip dirty pages in xfs_vm_releasepage() which also has the effect
      that if a dirty page is truncated, it does not get freed by
      block_invalidatepage() and is lingering in LRU list waiting for reclaim.
      So a simple loop like:
      
      while true; do
      	dd if=/dev/zero of=file bs=1M count=100
      	rm file
      done
      
      will keep using more and more memory until we hit low watermarks and
      start pagecache reclaim which will eventually reclaim also the truncate
      pages. Keeping these truncated (and thus never usable) pages in memory
      is just a waste of memory, is unnecessarily stressing page cache
      reclaim, and reportedly also leads to anonymous mmap(2) returning ENOMEM
      prematurely.
      
      So instead of just skipping dirty pages in xfs_vm_releasepage(), return
      to old behavior of skipping them only if they have delalloc or unwritten
      buffers and fix the spurious warnings by warning only if the page is
      clean.
      
      CC: stable@vger.kernel.org
      CC: Brian Foster <bfoster@redhat.com>
      CC: Vlastimil Babka <vbabka@suse.cz>
      Reported-by: default avatarPetr Tůma <petr.tuma@d3s.mff.cuni.cz>
      Fixes: 99579cceSigned-off-by: default avatarJan Kara <jack@suse.cz>
      Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
      Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
      0a417b8d