1. 01 Dec, 2014 2 commits
  2. 23 Nov, 2014 11 commits
    • Linus Torvalds's avatar
      Linux 3.18-rc6 · 5d01410f
      Linus Torvalds authored
      5d01410f
    • Andy Lutomirski's avatar
      uprobes, x86: Fix _TIF_UPROBE vs _TIF_NOTIFY_RESUME · 82975bc6
      Andy Lutomirski authored
      x86 call do_notify_resume on paranoid returns if TIF_UPROBE is set but
      not on non-paranoid returns.  I suspect that this is a mistake and that
      the code only works because int3 is paranoid.
      
      Setting _TIF_NOTIFY_RESUME in the uprobe code was probably a workaround
      for the x86 bug.  With that bug fixed, we can remove _TIF_NOTIFY_RESUME
      from the uprobes code.
      Reported-by: default avatarOleg Nesterov <oleg@redhat.com>
      Acked-by: default avatarSrikar Dronamraju <srikar@linux.vnet.ibm.com>
      Acked-by: default avatarBorislav Petkov <bp@suse.de>
      Signed-off-by: default avatarAndy Lutomirski <luto@amacapital.net>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      82975bc6
    • Thomas Gleixner's avatar
      sched: Provide update_curr callbacks for stop/idle scheduling classes · 90e362f4
      Thomas Gleixner authored
      Chris bisected a NULL pointer deference in task_sched_runtime() to
      commit 6e998916 'sched/cputime: Fix clock_nanosleep()/clock_gettime()
      inconsistency'.
      
      Chris observed crashes in atop or other /proc walking programs when he
      started fork bombs on his machine.  He assumed that this is a new exit
      race, but that does not make any sense when looking at that commit.
      
      What's interesting is that, the commit provides update_curr callbacks
      for all scheduling classes except stop_task and idle_task.
      
      While nothing can ever hit that via the clock_nanosleep() and
      clock_gettime() interfaces, which have been the target of the commit in
      question, the author obviously forgot that there are other code paths
      which invoke task_sched_runtime()
      
      do_task_stat(()
       thread_group_cputime_adjusted()
         thread_group_cputime()
           task_cputime()
             task_sched_runtime()
              if (task_current(rq, p) && task_on_rq_queued(p)) {
                update_rq_clock(rq);
                up->sched_class->update_curr(rq);
              }
      
      If the stats are read for a stomp machine task, aka 'migration/N' and
      that task is current on its cpu, this will happily call the NULL pointer
      of stop_task->update_curr.  Ooops.
      
      Chris observation that this happens faster when he runs the fork bomb
      makes sense as the fork bomb will kick migration threads more often so
      the probability to hit the issue will increase.
      
      Add the missing update_curr callbacks to the scheduler classes stop_task
      and idle_task.  While idle tasks cannot be monitored via /proc we have
      other means to hit the idle case.
      
      Fixes: 6e998916 'sched/cputime: Fix clock_nanosleep()/clock_gettime() inconsistency'
      Reported-by: default avatarChris Mason <clm@fb.com>
      Reported-and-tested-by: default avatarBorislav Petkov <bp@alien8.de>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Stanislaw Gruszka <sgruszka@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      90e362f4
    • Linus Torvalds's avatar
      Merge branch 'x86-traps' (trap handling from Andy Lutomirski) · 00c89b2f
      Linus Torvalds authored
      Merge x86-64 iret fixes from Andy Lutomirski:
       "This addresses the following issues:
      
         - an unrecoverable double-fault triggerable with modify_ldt.
         - invalid stack usage in espfix64 failed IRET recovery from IST
           context.
         - invalid stack usage in non-espfix64 failed IRET recovery from IST
           context.
      
        It also makes a good but IMO scary change: non-espfix64 failed IRET
        will now report the correct error.  Hopefully nothing depended on the
        old incorrect behavior, but maybe Wine will get confused in some
        obscure corner case"
      
      * emailed patches from Andy Lutomirski <luto@amacapital.net>:
        x86_64, traps: Rework bad_iret
        x86_64, traps: Stop using IST for #SS
        x86_64, traps: Fix the espfix64 #DF fixup and rewrite it in C
      00c89b2f
    • Andy Lutomirski's avatar
      x86_64, traps: Rework bad_iret · b645af2d
      Andy Lutomirski authored
      It's possible for iretq to userspace to fail.  This can happen because
      of a bad CS, SS, or RIP.
      
      Historically, we've handled it by fixing up an exception from iretq to
      land at bad_iret, which pretends that the failed iret frame was really
      the hardware part of #GP(0) from userspace.  To make this work, there's
      an extra fixup to fudge the gs base into a usable state.
      
      This is suboptimal because it loses the original exception.  It's also
      buggy because there's no guarantee that we were on the kernel stack to
      begin with.  For example, if the failing iret happened on return from an
      NMI, then we'll end up executing general_protection on the NMI stack.
      This is bad for several reasons, the most immediate of which is that
      general_protection, as a non-paranoid idtentry, will try to deliver
      signals and/or schedule from the wrong stack.
      
      This patch throws out bad_iret entirely.  As a replacement, it augments
      the existing swapgs fudge into a full-blown iret fixup, mostly written
      in C.  It's should be clearer and more correct.
      Signed-off-by: default avatarAndy Lutomirski <luto@amacapital.net>
      Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b645af2d
    • Andy Lutomirski's avatar
      x86_64, traps: Stop using IST for #SS · 6f442be2
      Andy Lutomirski authored
      On a 32-bit kernel, this has no effect, since there are no IST stacks.
      
      On a 64-bit kernel, #SS can only happen in user code, on a failed iret
      to user space, a canonical violation on access via RSP or RBP, or a
      genuine stack segment violation in 32-bit kernel code.  The first two
      cases don't need IST, and the latter two cases are unlikely fatal bugs,
      and promoting them to double faults would be fine.
      
      This fixes a bug in which the espfix64 code mishandles a stack segment
      violation.
      
      This saves 4k of memory per CPU and a tiny bit of code.
      Signed-off-by: default avatarAndy Lutomirski <luto@amacapital.net>
      Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      6f442be2
    • Andy Lutomirski's avatar
      x86_64, traps: Fix the espfix64 #DF fixup and rewrite it in C · af726f21
      Andy Lutomirski authored
      There's nothing special enough about the espfix64 double fault fixup to
      justify writing it in assembly.  Move it to C.
      
      This also fixes a bug: if the double fault came from an IST stack, the
      old asm code would return to a partially uninitialized stack frame.
      
      Fixes: 3891a04aSigned-off-by: default avatarAndy Lutomirski <luto@amacapital.net>
      Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      af726f21
    • Linus Torvalds's avatar
      Merge tag 'armsoc-for-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · 27946315
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "A collection of fixes this week:
      
         - A set of clock fixes for shmobile platforms
         - A fix for tegra that moves serial port labels to be per board.
           We're choosing to merge this for 3.18 because the labels will start
           being parsed in 3.19, and without this change serial port numbers
           that used to be stable since the dawn of time will change numbers.
         - A few other DT tweaks for Tegra.
         - A fix for multi_v7_defconfig that makes it stop spewing cpufreq
           errors on Arndale (Exynos)"
      
      * tag 'armsoc-for-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        ARM: multi_v7_defconfig: fix failure setting CPU voltage by enabling dependent I2C controller
        ARM: tegra: roth: Fix SD card VDD_IO regulator
        ARM: tegra: Remove eMMC vmmc property for roth/tn7
        ARM: dts: tegra: move serial aliases to per-board
        ARM: tegra: Add serial port labels to Tegra124 DT
        ARM: shmobile: kzm9g legacy: Set i2c clks_per_count to 2
        ARM: shmobile: r8a7740 dtsi: Correct IIC0 parent clock
        ARM: shmobile: r8a7790: Fix SD3CKCR address to device tree
        ARM: shmobile: r8a7740 legacy: Correct IIC0 parent clock
        ARM: shmobile: r8a7740 legacy: Add missing INTCA clock for irqpin module
        ARM: shmobile: r8a7790: Fix SD3CKCR address
        ARM: dts: sun6i: Re-parent ahb1_mux to pll6 as required by dma controller
      27946315
    • Linus Torvalds's avatar
      Merge branch 'for-3.18-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu · 9f2e0f63
      Linus Torvalds authored
      Pull percpu fix from Tejun Heo:
       "This contains one patch to fix a race condition which can lead to
        percpu_ref using a percpu pointer which is corrupted with a set DEAD
        bit.  The bug was introduced while separating out the ATOMIC mode flag
        from the DEAD flag.  The fix is pretty straight forward.
      
        I just committed the patch to the percpu tree but am sending out the
        pull request early as I'll be on vacation for a week.  The patch
        should be fairly safe and while the latency will be higher I'll be
        checking emails"
      
      * 'for-3.18-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
        percpu-ref: fix DEAD flag contamination of percpu pointer
      9f2e0f63
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · d038a63a
      Linus Torvalds authored
      Pull btrfs deadlock fix from Chris Mason:
       "This has a fix for a long standing deadlock that we've been trying to
        nail down for a while.  It ended up being a bad interaction with the
        fair reader/writer locks and the order btrfs reacquires locks in the
        btree"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        btrfs: fix lockups from btrfs_clear_path_blocking
      d038a63a
    • Tejun Heo's avatar
      percpu-ref: fix DEAD flag contamination of percpu pointer · 4aab3b5b
      Tejun Heo authored
      While decoupling ATOMIC and DEAD flags, f47ad457 ("percpu_ref:
      decouple switching to percpu mode and reinit") updated
      __ref_is_percpu() so that it only tests ATOMIC flag to determine
      whether the ref is in percpu mode or not; however, while DEAD implies
      ATOMIC, the two flags are set separately during percpu_ref_kill() and
      if __ref_is_percpu() races percpu_ref_kill(), it may see DEAD w/o
      ATOMIC.  Because __ref_is_percpu() returns @ref->percpu_count_ptr
      value verbatim as the percpu pointer after testing ATOMIC, the pointer
      may now be contaminated with the DEAD flag.
      
      This can be fixed by clearing the flag bits before returning the
      pointer which was the fix proposed by Shaohua; however, as DEAD
      implies ATOMIC, we can just test for both flags at once and avoid the
      explicit masking.
      
      Update __ref_is_percpu() so that it tests that both ATOMIC and DEAD
      are clear before returning @ref->percpu_count_ptr as the percpu
      pointer.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Reported-and-Reviewed-by: default avatarShaohua Li <shli@kernel.org>
      Link: http://lkml.kernel.org/r/995deb699f5b873c45d667df4add3b06f73c2c25.1416638887.git.shli@kernel.org
      Fixes: f47ad457 ("percpu_ref: decouple switching to percpu mode and reinit")
      4aab3b5b
  3. 22 Nov, 2014 2 commits
  4. 21 Nov, 2014 17 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 8a84e01e
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Fix BUG when decrypting empty packets in mac80211, from Ronald Wahl.
      
       2) nf_nat_range is not fully initialized and this is copied back to
          userspace, from Daniel Borkmann.
      
       3) Fix read past end of b uffer in netfilter ipset, also from Dan
          Carpenter.
      
       4) Signed integer overflow in ipv4 address mask creation helper
          inet_make_mask(), from Vincent BENAYOUN.
      
       5) VXLAN, be2net, mlx4_en, and qlcnic need ->ndo_gso_check() methods to
          properly describe the device's capabilities, from Joe Stringer.
      
       6) Fix memory leaks and checksum miscalculations in openvswitch, from
          Pravin B SHelar and Jesse Gross.
      
       7) FIB rules passes back ambiguous error code for unreachable routes,
          making behavior confusing for userspace.  Fix from Panu Matilainen.
      
       8) ieee802154fake_probe() doesn't release resources properly on error,
          from Alexey Khoroshilov.
      
       9) Fix skb_over_panic in add_grhead(), from Daniel Borkmann.
      
      10) Fix access of stale slave pointers in bonding code, from Nikolay
          Aleksandrov.
      
      11) Fix stack info leak in PPP pptp code, from Mathias Krause.
      
      12) Cure locking bug in IPX stack, from Jiri Bohac.
      
      13) Revert SKB fclone memory freeing optimization that is racey and can
          allow accesses to freed up memory, from Eric Dumazet.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (71 commits)
        tcp: Restore RFC5961-compliant behavior for SYN packets
        net: Revert "net: avoid one atomic operation in skb_clone()"
        virtio-net: validate features during probe
        cxgb4 : Fix DCB priority groups being returned in wrong order
        ipx: fix locking regression in ipx_sendmsg and ipx_recvmsg
        openvswitch: Don't validate IPv6 label masks.
        pptp: fix stack info leak in pptp_getname()
        brcmfmac: don't include linux/unaligned/access_ok.h
        cxgb4i : Don't block unload/cxgb4 unload when remote closes TCP connection
        ipv6: delete protocol and unregister rtnetlink when cleanup
        net/mlx4_en: Add VXLAN ndo calls to the PF net device ops too
        bonding: fix curr_active_slave/carrier with loadbalance arp monitoring
        mac80211: minstrel_ht: fix a crash in rate sorting
        vxlan: Inline vxlan_gso_check().
        can: m_can: update to support CAN FD features
        can: m_can: fix incorrect error messages
        can: m_can: add missing delay after setting CCCR_INIT bit
        can: m_can: fix not set can_dlc for remote frame
        can: m_can: fix possible sleep in napi poll
        can: m_can: add missing message RAM initialization
        ...
      8a84e01e
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 928352e9
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Just two radeon and two intel fixes: endian and regression fixes"
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        drm/radeon: fix endian swapping in vbios fetch for tdp table
        drm/radeon: disable native backlight control on pre-r6xx asics (v2)
        drm/i915: Kick fbdev before vgacon
        drm/i915: drop WaSetupGtModeTdRowDispatch:snb
      928352e9
    • Linus Torvalds's avatar
      Merge tag 'sound-3.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 9a7e4f56
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "This batch ended up as a relatively high volume due to pending ASoC
        fixes.  But most of fixes there are trivial and/or device- specific
        fixes and quirks, so safe to apply.  The only (ASoC) core fixes are
        the DPCM race fix and the machine-driver matching fix for
        componentization"
      
      * tag 'sound-3.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: hda - fix the mic mute led problem for Latitude E5550
        ALSA: hda - move DELL_WMI_MIC_MUTE_LED to the tail in the quirk chain
        ASoC: wm_adsp: Avoid attempt to free buffers that might still be in use
        ALSA: usb-audio: Set the Control Selector to SU_SELECTOR_CONTROL for UAC2
        ALSA: usb-audio: Add ctrl message delay quirk for Marantz/Denon devices
        ASoC: sgtl5000: Fix SMALL_POP bit definition
        ASoC: cs42l51: re-hook of_match_table pointer
        ASoC: rt5670: change dapm routes of PLL connection
        ASoC: rt5670: correct the incorrect default values
        ASoC: samsung: Add MODULE_DEVICE_TABLE for Snow
        ASoC: max98090: Correct pclk divisor settings
        ASoC: dpcm: Fix race between FE/BE updates and trigger
        ASoC: Fix snd_soc_find_dai() matching component by name
        ASoC: rsnd: remove unsupported PAUSE flag
        ASoC: fsi: remove unsupported PAUSE flag
        ASoC: rt5645: Mark RT5645_TDM_CTRL_3 as readable
        ASoC: rockchip-i2s: fix infinite loop in rockchip_snd_rxctrl
        ASoC: es8328-i2c: Fix i2c_device_id name field in es8328_id
        ASoC: fsl_asrc: Add reg_defaults for regmap to fix kernel dump
      9a7e4f56
    • Linus Torvalds's avatar
      Merge tag 'pm+acpi-3.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · f100a746
      Linus Torvalds authored
      Pull ACPI power management fix from Rafael Wysocki:
       "This is just a one-liner fixing a regression introduced in 3.13 that
        broke system suspend on some Chromebooks.
      
        On those machines there are ACPI device objects for some I2C devices
        that can wake up the system from sleep states, but that is done via a
        platform-specific mechanism and the ACPI objects don't contain any
        wakeup-related information.  When we started to use ACPI power
        management with those devices (which happened during the 3.13 cycle),
        their configuration confused the ACPI PM layer that returned error
        codes from suspend callbacks for them causing system suspend to fail.
      
        However, the ACPI PM layer can safely ignore the wakeup setting from a
        device driver if the ACPI object corresponding to the device in
        question doesn't contain wakeup information in which case the driver
        itself is responsible for setting up the device for system wakeup"
      
      * tag 'pm+acpi-3.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        ACPI / PM: Ignore wakeup setting if the ACPI companion can't wake up
      f100a746
    • Linus Torvalds's avatar
      Merge tag 'devicetree-fixes-for-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux · 2e29a6d0
      Linus Torvalds authored
      Pull devicetree fixes from Rob Herring:
       "DeviceTree fixes for 3.18:
      
         - two fixes for OF selftest code
         - fix for PowerPC address parsing to disable work-around except on
           old PowerMACs
         - fix a crash when earlycon is enabled, but no device is found
         - DT documentation fixes and missing vendor prefixes
      
        All but the doc updates are also for stable"
      
      * tag 'devicetree-fixes-for-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
        of/selftest: Fix testing when /aliases is missing
        of/selftest: Fix off-by-one error in removal path
        documentation: pinctrl bindings: Fix trivial typo 'abitrary'
        devicetree: bindings: Add vendor prefix for Micron Technology, Inc.
        of: Add vendor prefix for Chips&Media, Inc.
        of/base: Fix PowerPC address parsing hack
        devicetree: vendor-prefixes.txt: fix whitespace
        of: Fix crash if an earlycon driver is not found
        of/irq: Drop obsolete 'interrupts' vs 'interrupts-extended' text
        of: Spelling s/stucture/structure/
        devicetree: bindings: add sandisk to the vendor prefixes
      2e29a6d0
    • Linus Torvalds's avatar
      Merge tag 'pci-v3.18-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci · 08685897
      Linus Torvalds authored
      Pull PCI fixes from Bjorn Helgaas:
       "These are fixes for an issue with 64-bit PCI bus addresses on 32-bit
        PAE kernels, an APM X-Gene problem (it depended on a generic change we
        removed before merging), a fix for my hotplug device configuration
        changes, and a devicetree documentation update.
      
        Resource management:
          - Support 64-bit bridge windows if we have 64-bit dma_addr_t (Yinghai Lu)
      
        PCI device hotplug:
          - Apply _HPX Link Control settings to all devices with a link (Yinghai Lu)
      
        Generic host bridge driver:
          - Add DT binding for "linux,pci-domain" property (Lucas Stach)
      
        APM X-Gene:
          - Assign resources to bus before adding new devices (Duc Dang)"
      
      * tag 'pci-v3.18-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
        PCI: Support 64-bit bridge windows if we have 64-bit dma_addr_t
        PCI: Apply _HPX Link Control settings to all devices with a link
        PCI: Add missing DT binding for "linux,pci-domain" property
        PCI: xgene: Assign resources to bus before adding new devices
      08685897
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · a46171d0
      Linus Torvalds authored
      Pull SCSI target fixes from Nicholas Bellinger:
       "Here are the target-pending fixes queued for v3.18-rc6.
      
        The highlights include:
      
         - target-core OOPs fix with tcm_qla2xxx + vxworks FC initiators +
           zero length SCSI commands having a transfer direction set.  (Roland
           + Craig Watson)
      
         - vhost-scsi OOPs fix to explicitly prevent WWPN endpoint configfs
           group removal while qemu still has an active reference.  (Paolo +
           nab)
      
         - ib_srpt fix for RDMA hardware with lower srp_sq_size limits.
           (Bart)
      
         - two ib_isert work-arounds for running on ocrdma hardware (Or + Sagi
           + Chris)
      
         - iscsi-target discovery portal typo + SPC-3 PR Preempt SA key
           matching fix (Steve)"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
        IB/isert: Adjust CQ size to HW limits
        target: return CONFLICT only when SA key unmatched
        iser-target: Handle DEVICE_REMOVAL event on network portal listener correctly
        ib_isert: Add max_send_sge=2 minimum for control PDU responses
        srp-target: Retry when QP creation fails with ENOMEM
        iscsi-target: return the correct port in SendTargets
        vhost-scsi: Take configfs group dependency during VHOST_SCSI_SET_ENDPOINT
        target: Don't call TFO->write_pending if data_length == 0
      a46171d0
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma · 4ec69c7e
      Linus Torvalds authored
      Pull dmaengine fixes from Vinod Koul:
       "We have couple of fixes for dmaengine queued up:
         - dma mempcy fix for dma configuration of sun6i by Maxime
         - pl330 fixes: First the fixing allocation for data buffers by Liviu
           and then Jon's fixe for fifo width and usage"
      
      * 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
        dmaengine: Fix allocation size for PL330 data buffer depth.
        dmaengine: pl330: Limit MFIFO usage for memcpy to avoid exhausting entries
        dmaengine: pl330: Align DMA memcpy operations to MFIFO width
        dmaengine: sun6i: Fix memcpy operation
      4ec69c7e
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · e6a588d0
      Linus Torvalds authored
      Pull MIPS fixes from Ralf Baechle:
       "More 3.18 fixes for MIPS:
      
         - backtraces were not quite working on on 64-bit kernels
         - loongson needs a different cache coherency setting
         - Loongson 3 is a MIPS64 R2 version but due to erratum we treat is an
           older architecture revision.
         - fix build errors due to undefined references to __node_distances
           for certain configurations.
         - fix instruction decodig in the jump label code.
         - for certain configurations copy_{from,to}_user destroy the content
           of $3 so that register needs to be marked as clobbed by the calling
           code.
         - Hardware Table Walker fixes.
         - fill the delay slot of the last instruction of memcpy otherwise
           whatever ends up there randomly might have undesirable effects.
         - ensure get_user/__get_user always zero the variable to be read even
           in case of an error"
      
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
        MIPS: jump_label.c: Handle the microMIPS J instruction encoding
        MIPS: jump_label.c: Correct the span of the J instruction
        MIPS: Zero variable read by get_user / __get_user in case of an error.
        MIPS: lib: memcpy: Restore NOP on delay slot before returning to caller
        MIPS: tlb-r4k: Add missing HTW stop/start sequences
        MIPS: asm: uaccess: Add v1 register to clobber list on EVA
        MIPS: oprofile: Fix backtrace on 64-bit kernel
        MIPS: Loongson: Set Loongson-3's ISA level to MIPS64R1
        MIPS: Loongson: Fix the write-combine CCA value setting
        MIPS: IP27: Fix __node_distances undefined error
        MIPS: Loongson3: Fix __node_distances undefined error
      e6a588d0
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux · 4fc82c0a
      Linus Torvalds authored
      Pull powerpc fix from Michael Ellerman:
       "One fix from Scott, he says:
      
        This patch fixes a crash (introduced in v3.18-rc1) in the FSL MSI driver
        when threaded IRQs are enabled"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux:
        powerpc/fsl_msi: mark the msi cascade handler IRQF_NO_THREAD
      4fc82c0a
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c6c9161d
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "Misc fixes:
         - gold linker build fix
         - noxsave command line parsing fix
         - bugfix for NX setup
         - microcode resume path bug fix
         - _TIF_NOHZ versus TIF_NOHZ bugfix as discussed in the mysterious
           lockup thread"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86, syscall: Fix _TIF_NOHZ handling in syscall_trace_enter_phase1
        x86, kaslr: Handle Gold linker for finding bss/brk
        x86, mm: Set NX across entire PMD at boot
        x86, microcode: Update BSPs microcode on resume
        x86: Require exact match for 'noxsave' command line option
      c6c9161d
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 8b2ed21e
      Linus Torvalds authored
      Pull scheduler fixes from Ingo Molnar:
       "Misc fixes: two NUMA fixes, two cputime fixes and an RCU/lockdep fix"
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/cputime: Fix clock_nanosleep()/clock_gettime() inconsistency
        sched/cputime: Fix cpu_timer_sample_group() double accounting
        sched/numa: Avoid selecting oneself as swap target
        sched/numa: Fix out of bounds read in sched_init_numa()
        sched: Remove lockdep check in sched_move_task()
      8b2ed21e
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 13f5004c
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar:
       "Misc fixes: two Intel uncore driver fixes, a CPU-hotplug fix and a
        build dependencies fix"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86/intel/uncore: Fix boot crash on SBOX PMU on Haswell-EP
        perf/x86/intel/uncore: Fix IRP uncore register offsets on Haswell EP
        perf: Fix corruption of sibling list with hotplug
        perf/x86: Fix embarrasing typo
      13f5004c
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a64bb02f
      Linus Torvalds authored
      Pull core fix from Ingo Molnar:
       "Fix GENMASK macro shift overflow"
      
      Nobody seems to currently use GENMASK() to fill every single last bit
      (which is what overflows) in-tree, and gcc would warn about it, so we
      have that going for us.  But apparently there are pending changes that
      want this.
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        bitops: Fix shift overflow in GENMASK macros
      a64bb02f
    • Calvin Owens's avatar
      tcp: Restore RFC5961-compliant behavior for SYN packets · 0c228e83
      Calvin Owens authored
      Commit c3ae62af ("tcp: should drop incoming frames without ACK
      flag set") was created to mitigate a security vulnerability in which a
      local attacker is able to inject data into locally-opened sockets by
      using TCP protocol statistics in procfs to quickly find the correct
      sequence number.
      
      This broke the RFC5961 requirement to send a challenge ACK in response
      to spurious RST packets, which was subsequently fixed by commit
      7b514a88 ("tcp: accept RST without ACK flag").
      
      Unfortunately, the RFC5961 requirement that spurious SYN packets be
      handled in a similar manner remains broken.
      
      RFC5961 section 4 states that:
      
         ... the handling of the SYN in the synchronized state SHOULD be
         performed as follows:
      
         1) If the SYN bit is set, irrespective of the sequence number, TCP
            MUST send an ACK (also referred to as challenge ACK) to the remote
            peer:
      
            <SEQ=SND.NXT><ACK=RCV.NXT><CTL=ACK>
      
            After sending the acknowledgment, TCP MUST drop the unacceptable
            segment and stop processing further.
      
         By sending an ACK, the remote peer is challenged to confirm the loss
         of the previous connection and the request to start a new connection.
         A legitimate peer, after restart, would not have a TCB in the
         synchronized state.  Thus, when the ACK arrives, the peer should send
         a RST segment back with the sequence number derived from the ACK
         field that caused the RST.
      
         This RST will confirm that the remote peer has indeed closed the
         previous connection.  Upon receipt of a valid RST, the local TCP
         endpoint MUST terminate its connection.  The local TCP endpoint
         should then rely on SYN retransmission from the remote end to
         re-establish the connection.
      
      This patch lets SYN packets through the discard added in c3ae62af,
      so that spurious SYN packets are properly dealt with as per the RFC.
      
      The challenge ACK is sent unconditionally and is rate-limited, so the
      original vulnerability is not reintroduced by this patch.
      Signed-off-by: default avatarCalvin Owens <calvinowens@fb.com>
      Acked-by: default avatarEric Dumazet <edumazet@google.com>
      Acked-by: default avatarNeal Cardwell <ncardwell@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0c228e83
    • Eric Dumazet's avatar
      net: Revert "net: avoid one atomic operation in skb_clone()" · e7820e39
      Eric Dumazet authored
      Not sure what I was thinking, but doing anything after
      releasing a refcount is suicidal or/and embarrassing.
      
      By the time we set skb->fclone to SKB_FCLONE_FREE, another cpu
      could have released last reference and freed whole skb.
      
      We potentially corrupt memory or trap if CONFIG_DEBUG_PAGEALLOC is set.
      Reported-by: default avatarChris Mason <clm@fb.com>
      Fixes: ce1a4ea3 ("net: avoid one atomic operation in skb_clone()")
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Cc: Sabrina Dubroca <sd@queasysnail.net>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e7820e39
    • Al Viro's avatar
      Merge branch 'overlayfs-current' of... · 3035b675
      Al Viro authored
      Merge branch 'overlayfs-current' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs into for-linus
      
      "The biggest change is to rename the filesystem from "overlayfs" to "overlay".
      This will allow legacy overlayfs to be easily carried by distros alongside the
      new mainline one.  Also fix a couple of copy-up races and allow escaping comma
      character in filenames."
      
      The last bit is about commas in pathname mount options...
      3035b675
  5. 20 Nov, 2014 8 commits