1. 04 Jun, 2016 4 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client · a3021a59
      Linus Torvalds authored
      Pull Ceph fixes from Sage Weil:
       "We have a few follow-up fixes for the libceph refactor from Ilya, and
        then some cephfs + fscache fixes from Zheng.
      
        The first two FS-Cache patches are acked by David Howells and deemed
        trivial enough to go through our tree.  The rest fix some issues with
        the ceph fscache handling (disable cache for inodes opened for write,
        and simplify the revalidation logic accordingly, dropping the
        now-unnecessary work queue)"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
        ceph: use i_version to check validity of fscache
        ceph: improve fscache revalidation
        ceph: disable fscache when inode is opened for write
        ceph: avoid unnecessary fscache invalidation/revlidation
        ceph: call __fscache_uncache_page() if readpages fails
        FS-Cache: make check_consistency callback return int
        FS-Cache: wake write waiter after invalidating writes
        libceph: use %s instead of %pE in dout()s
        libceph: put request only if it's done in handle_reply()
        libceph: change ceph_osdmap_flag() to take osdc
      a3021a59
    • Linus Torvalds's avatar
      Merge tag 'acpi-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · eb10a7b7
      Linus Torvalds authored
      Pull ACPI fixes from Rafael Wysocki:
       "Two fixes for problems introduced recently (ACPICA and the ACPI
        backlight driver) and one fix for an older issue that prevents at
        least one system from booting.
      
        Specifics:
      
         - Fix an incorrect check introduced by recent ACPICA changes which
           causes problems with booting KVM guests to happen, among other
           things (Lv Zheng).
      
         - Fix a backlight issue introduced by recent changes to the ACPI
           video driver (Aaron Lu).
      
         - Fix the ACPI processor initialization which attempts to register an
           IO region without checking if that really is necessary and
           sometimes prevents drivers loaded subsequently from registering
           their resources which leads to boot issues (Rafael Wysocki)"
      
      * tag 'acpi-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        ACPI / processor: Avoid reserving IO regions too early
        ACPICA / Hardware: Fix old register check in acpi_hw_get_access_bit_width()
        ACPI / Thermal / video: fix max_level incorrect value
      eb10a7b7
    • Linus Torvalds's avatar
      Merge tag 'pm-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 50163203
      Linus Torvalds authored
      Pull power management fixes from Rafael Wysocki:
       "Two fixes for problems introduced recently in the cpufreq core and the
        intel_pstate driver.
      
        Specifics:
      
         - Fix a silly mistake related to the clamp_val() usage in a function
           added by a recent commit (Rafael Wysocki).
      
         - Reduce the log level of an annoying message added to intel_pstate
           during the recent merge window (Srinivas Pandruvada)"
      
      * tag 'pm-4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        cpufreq: Fix clamp_val() usage in cpufreq_driver_fast_switch()
        cpufreq: intel_pstate: Downgrade print level for _PPC
      50163203
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · d46d0256
      Linus Torvalds authored
      Merge various fixes from Andrew Morton:
       "10 fixes"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>:
        mm, page_alloc: recalculate the preferred zoneref if the context can ignore memory policies
        mm, page_alloc: reset zonelist iterator after resetting fair zone allocation policy
        mm, oom_reaper: do not use siglock in try_oom_reaper()
        mm, page_alloc: prevent infinite loop in buffered_rmqueue()
        checkpatch: reduce git commit description style false positives
        mm/z3fold.c: avoid modifying HEADLESS page and minor cleanup
        memcg: add RCU locking around css_for_each_descendant_pre() in memcg_offline_kmem()
        mm: check the return value of lookup_page_ext for all call sites
        kdump: fix dmesg gdbmacro to work with record based printk
        mm: fix overflow in vm_map_ram()
      d46d0256
  2. 03 Jun, 2016 26 commits
  3. 02 Jun, 2016 10 commits
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 4340fa55
      Linus Torvalds authored
      Pull KVM fixes from Radim Krčmář:
       "ARM:
         - two fixes for 4.6 vgic [Christoffer] (cc stable)
      
         - six fixes for 4.7 vgic [Marc]
      
        x86:
         - six fixes from syzkaller reports [Paolo] (two of them cc stable)
      
         - allow OS X to boot [Dmitry]
      
         - don't trust compilers [Nadav]"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: x86: fix OOPS after invalid KVM_SET_DEBUGREGS
        KVM: x86: avoid vmalloc(0) in the KVM_SET_CPUID
        KVM: irqfd: fix NULL pointer dereference in kvm_irq_map_gsi
        KVM: fail KVM_SET_VCPU_EVENTS with invalid exception number
        KVM: x86: avoid vmalloc(0) in the KVM_SET_CPUID
        kvm: x86: avoid warning on repeated KVM_SET_TSS_ADDR
        KVM: Handle MSR_IA32_PERF_CTL
        KVM: x86: avoid write-tearing of TDP
        KVM: arm/arm64: vgic-new: Removel harmful BUG_ON
        arm64: KVM: vgic-v3: Relax synchronization when SRE==1
        arm64: KVM: vgic-v3: Prevent the guest from messing with ICC_SRE_EL1
        arm64: KVM: Make ICC_SRE_EL1 access return the configured SRE value
        KVM: arm/arm64: vgic-v3: Always resample level interrupts
        KVM: arm/arm64: vgic-v2: Always resample level interrupts
        KVM: arm/arm64: vgic-v3: Clear all dirty LRs
        KVM: arm/arm64: vgic-v2: Clear all dirty LRs
      4340fa55
    • Joshua Henderson's avatar
      irqchip/irq-pic32-evic: Fix bug with external interrupts. · 0de6b997
      Joshua Henderson authored
      The wrong external interrupt bits are being set, offset by 1.
      Signed-off-by: default avatarJoshua Henderson <digitalpeer@digitalpeer.com>
      Signed-off-by: default avatarPurna Chandra Mandal <purna.mandal@microchip.com>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      0de6b997
    • Ganapatrao Kulkarni's avatar
      irqchip/gicv3-its: numa: Enable workaround for Cavium thunderx erratum 23144 · fbf8f40e
      Ganapatrao Kulkarni authored
      The erratum fixes the hang of ITS SYNC command by avoiding inter node
      io and collections/cpu mapping on thunderx dual-socket platform.
      
      This fix is only applicable for Cavium's ThunderX dual-socket platform.
      Reviewed-by: default avatarRobert Richter <rrichter@cavium.com>
      Signed-off-by: default avatarGanapatrao Kulkarni <gkulkarni@caviumnetworks.com>
      Signed-off-by: default avatarRobert Richter <rrichter@cavium.com>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      fbf8f40e
    • Andrew Jones's avatar
      irqchip/gic-v3: Fix quiescence check in gic_enable_redist · cf1d9d11
      Andrew Jones authored
      Make sure the two sides of the bitwise operation are bool.
      Signed-off-by: default avatarAndrew Jones <drjones@redhat.com>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      cf1d9d11
    • Andrew Jones's avatar
      irqchip/gic-v3: Fix copy+paste mistakes in defines · fab0cdc3
      Andrew Jones authored
      ICC_SGI1R_AFFINITY_{2,3}_MASK are unused, which is good
      because they were defined with the wrong shifts.
      Signed-off-by: default avatarAndrew Jones <drjones@redhat.com>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      fab0cdc3
    • Marc Zyngier's avatar
      irqchip/gic-v3: Fix ICC_SGI1R_EL1.INTID decoding mask · dd5f1b04
      Marc Zyngier authored
      The INTID mask is wrong, and is made a signed value, which has
      nteresting effects in the KVM emulation. Let's sanitize it.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      dd5f1b04
    • Paolo Bonzini's avatar
      KVM: x86: fix OOPS after invalid KVM_SET_DEBUGREGS · d14bdb55
      Paolo Bonzini authored
      MOV to DR6 or DR7 causes a #GP if an attempt is made to write a 1 to
      any of bits 63:32.  However, this is not detected at KVM_SET_DEBUGREGS
      time, and the next KVM_RUN oopses:
      
         general protection fault: 0000 [#1] SMP
         CPU: 2 PID: 14987 Comm: a.out Not tainted 4.4.9-300.fc23.x86_64 #1
         Hardware name: LENOVO 2325F51/2325F51, BIOS G2ET32WW (1.12 ) 05/30/2012
         [...]
         Call Trace:
          [<ffffffffa072c93d>] kvm_arch_vcpu_ioctl_run+0x141d/0x14e0 [kvm]
          [<ffffffffa071405d>] kvm_vcpu_ioctl+0x33d/0x620 [kvm]
          [<ffffffff81241648>] do_vfs_ioctl+0x298/0x480
          [<ffffffff812418a9>] SyS_ioctl+0x79/0x90
          [<ffffffff817a0f2e>] entry_SYSCALL_64_fastpath+0x12/0x71
         Code: 55 83 ff 07 48 89 e5 77 27 89 ff ff 24 fd 90 87 80 81 0f 23 fe 5d c3 0f 23 c6 5d c3 0f 23 ce 5d c3 0f 23 d6 5d c3 0f 23 de 5d c3 <0f> 23 f6 5d c3 0f 0b 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00
         RIP  [<ffffffff810639eb>] native_set_debugreg+0x2b/0x40
          RSP <ffff88005836bd50>
      
      Testcase (beautified/reduced from syzkaller output):
      
          #include <unistd.h>
          #include <sys/syscall.h>
          #include <string.h>
          #include <stdint.h>
          #include <linux/kvm.h>
          #include <fcntl.h>
          #include <sys/ioctl.h>
      
          long r[8];
      
          int main()
          {
              struct kvm_debugregs dr = { 0 };
      
              r[2] = open("/dev/kvm", O_RDONLY);
              r[3] = ioctl(r[2], KVM_CREATE_VM, 0);
              r[4] = ioctl(r[3], KVM_CREATE_VCPU, 7);
      
              memcpy(&dr,
                     "\x5d\x6a\x6b\xe8\x57\x3b\x4b\x7e\xcf\x0d\xa1\x72"
                     "\xa3\x4a\x29\x0c\xfc\x6d\x44\x00\xa7\x52\xc7\xd8"
                     "\x00\xdb\x89\x9d\x78\xb5\x54\x6b\x6b\x13\x1c\xe9"
                     "\x5e\xd3\x0e\x40\x6f\xb4\x66\xf7\x5b\xe3\x36\xcb",
                     48);
              r[7] = ioctl(r[4], KVM_SET_DEBUGREGS, &dr);
              r[6] = ioctl(r[4], KVM_RUN, 0);
          }
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
      d14bdb55
    • Paolo Bonzini's avatar
      KVM: x86: avoid vmalloc(0) in the KVM_SET_CPUID · f8c1b85b
      Paolo Bonzini authored
      This causes an ugly dmesg splat.  Beautified syzkaller testcase:
      
          #include <unistd.h>
          #include <sys/syscall.h>
          #include <sys/ioctl.h>
          #include <fcntl.h>
          #include <linux/kvm.h>
      
          long r[8];
      
          int main()
          {
              struct kvm_irq_routing ir = { 0 };
              r[2] = open("/dev/kvm", O_RDWR);
              r[3] = ioctl(r[2], KVM_CREATE_VM, 0);
              r[4] = ioctl(r[3], KVM_SET_GSI_ROUTING, &ir);
              return 0;
          }
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
      f8c1b85b
    • Paolo Bonzini's avatar
      KVM: irqfd: fix NULL pointer dereference in kvm_irq_map_gsi · c622a3c2
      Paolo Bonzini authored
      Found by syzkaller:
      
          BUG: unable to handle kernel NULL pointer dereference at 0000000000000120
          IP: [<ffffffffa0797202>] kvm_irq_map_gsi+0x12/0x90 [kvm]
          PGD 6f80b067 PUD b6535067 PMD 0
          Oops: 0000 [#1] SMP
          CPU: 3 PID: 4988 Comm: a.out Not tainted 4.4.9-300.fc23.x86_64 #1
          [...]
          Call Trace:
           [<ffffffffa0795f62>] irqfd_update+0x32/0xc0 [kvm]
           [<ffffffffa0796c7c>] kvm_irqfd+0x3dc/0x5b0 [kvm]
           [<ffffffffa07943f4>] kvm_vm_ioctl+0x164/0x6f0 [kvm]
           [<ffffffff81241648>] do_vfs_ioctl+0x298/0x480
           [<ffffffff812418a9>] SyS_ioctl+0x79/0x90
           [<ffffffff817a1062>] tracesys_phase2+0x84/0x89
          Code: b5 71 a7 e0 5b 41 5c 41 5d 5d f3 c3 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 8b 8f 10 2e 00 00 31 c0 48 89 e5 <39> 91 20 01 00 00 76 6a 48 63 d2 48 8b 94 d1 28 01 00 00 48 85
          RIP  [<ffffffffa0797202>] kvm_irq_map_gsi+0x12/0x90 [kvm]
           RSP <ffff8800926cbca8>
          CR2: 0000000000000120
      
      Testcase:
      
          #include <unistd.h>
          #include <sys/syscall.h>
          #include <string.h>
          #include <stdint.h>
          #include <linux/kvm.h>
          #include <fcntl.h>
          #include <sys/ioctl.h>
      
          long r[26];
      
          int main()
          {
              memset(r, -1, sizeof(r));
              r[2] = open("/dev/kvm", 0);
              r[3] = ioctl(r[2], KVM_CREATE_VM, 0);
      
              struct kvm_irqfd ifd;
              ifd.fd = syscall(SYS_eventfd2, 5, 0);
              ifd.gsi = 3;
              ifd.flags = 2;
              ifd.resamplefd = ifd.fd;
              r[25] = ioctl(r[3], KVM_IRQFD, &ifd);
              return 0;
          }
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
      c622a3c2
    • Paolo Bonzini's avatar
      KVM: fail KVM_SET_VCPU_EVENTS with invalid exception number · 78e546c8
      Paolo Bonzini authored
      This cannot be returned by KVM_GET_VCPU_EVENTS, so it is okay to return
      EINVAL.  It causes a WARN from exception_type:
      
          WARNING: CPU: 3 PID: 16732 at arch/x86/kvm/x86.c:345 exception_type+0x49/0x50 [kvm]()
          CPU: 3 PID: 16732 Comm: a.out Tainted: G        W       4.4.6-300.fc23.x86_64 #1
          Hardware name: LENOVO 2325F51/2325F51, BIOS G2ET32WW (1.12 ) 05/30/2012
           0000000000000286 000000006308a48b ffff8800bec7fcf8 ffffffff813b542e
           0000000000000000 ffffffffa0966496 ffff8800bec7fd30 ffffffff810a40f2
           ffff8800552a8000 0000000000000000 00000000002c267c 0000000000000001
          Call Trace:
           [<ffffffff813b542e>] dump_stack+0x63/0x85
           [<ffffffff810a40f2>] warn_slowpath_common+0x82/0xc0
           [<ffffffff810a423a>] warn_slowpath_null+0x1a/0x20
           [<ffffffffa0924809>] exception_type+0x49/0x50 [kvm]
           [<ffffffffa0934622>] kvm_arch_vcpu_ioctl_run+0x10a2/0x14e0 [kvm]
           [<ffffffffa091c04d>] kvm_vcpu_ioctl+0x33d/0x620 [kvm]
           [<ffffffff81241248>] do_vfs_ioctl+0x298/0x480
           [<ffffffff812414a9>] SyS_ioctl+0x79/0x90
           [<ffffffff817a04ee>] entry_SYSCALL_64_fastpath+0x12/0x71
          ---[ end trace b1a0391266848f50 ]---
      
      Testcase (beautified/reduced from syzkaller output):
      
          #include <unistd.h>
          #include <sys/syscall.h>
          #include <string.h>
          #include <stdint.h>
          #include <fcntl.h>
          #include <sys/ioctl.h>
          #include <linux/kvm.h>
      
          long r[31];
      
          int main()
          {
              memset(r, -1, sizeof(r));
              r[2] = open("/dev/kvm", O_RDONLY);
              r[3] = ioctl(r[2], KVM_CREATE_VM, 0);
              r[7] = ioctl(r[3], KVM_CREATE_VCPU, 0);
      
              struct kvm_vcpu_events ve = {
                      .exception.injected = 1,
                      .exception.nr = 0xd4
              };
              r[27] = ioctl(r[7], KVM_SET_VCPU_EVENTS, &ve);
              r[30] = ioctl(r[7], KVM_RUN, 0);
              return 0;
          }
      Reported-by: default avatarDmitry Vyukov <dvyukov@google.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
      78e546c8