1. 20 Aug, 2012 3 commits
  2. 17 Aug, 2012 26 commits
    • Carlos Alberto Lopez Perez's avatar
      classmate-laptop: always call input_sync() after input_report_switch() · ad20c73b
      Carlos Alberto Lopez Perez authored
      Due to commit cdda911c evdev only
      becomes readable when the buffer contains an EV_SYN/SYN_REPORT event.
      
      So in order to read the tablet sensor data as it happens we need to
      ensure that we always call input_sync() after input_report_switch()
      Signed-off-by: default avatarCarlos Alberto Lopez Perez <clopez@igalia.com>
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      ad20c73b
    • Manoj Iyer's avatar
      thinkpad-acpi: recognize latest V-Series using DMI_BIOS_VENDOR · a4f46bb9
      Manoj Iyer authored
      In the latest V-series bios DMI_PRODUCT_VERSION does not contain
      the string Lenovo or Thinkpad, but is set to the model number, this
      causes the thinkpad_acpi module to fail to load. Recognize laptop
      as Lenovo using DMI_BIOS_VENDOR instead, which is set to Lenovo.
      
      Test on V490u
      =============
      == After the patch ==
      
      [ 1350.295757] thinkpad_acpi: ThinkPad ACPI Extras v0.24
      [ 1350.295760] thinkpad_acpi: http://ibm-acpi.sf.net/
      [ 1350.295761] thinkpad_acpi: ThinkPad BIOS H7ET21WW (1.00 ), EC unknown
      [ 1350.295763] thinkpad_acpi: Lenovo LENOVO, model LV5DXXX
      [ 1350.296086] thinkpad_acpi: detected a 8-level brightness capable ThinkPad
      [ 1350.296694] thinkpad_acpi: radio switch found; radios are enabled
      [ 1350.296703] thinkpad_acpi: possible tablet mode switch found; ThinkPad in laptop mode
      [ 1350.306466] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
      [ 1350.307082] Registered led device: tpacpi::thinklight
      [ 1350.307215] Registered led device: tpacpi::power
      [ 1350.307255] Registered led device: tpacpi::standby
      [ 1350.307294] Registered led device: tpacpi::thinkvantage
      [ 1350.308160] thinkpad_acpi: Standard ACPI backlight interface available, not loading native one
      [ 1350.308333] thinkpad_acpi: Console audio control enabled, mode: monitor (read only)
      [ 1350.312287] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input14
      
      == Before the patch ==
      sudo modprobe thinkpad_acpi
      FATAL: Error inserting thinkpad_acpi (/lib/modules/3.2.0-27-generic/kernel/drivers/platform/x86/thinkpad_acpi.ko): No such device
      
      Test on B485
      =============
      This patch was also test in a B485 where the thinkpad_acpi module does not
      have any issues loading. But, I tested it to make sure this patch does not
      break on already functioning models of Lenovo products.
      
      [13486.746359] thinkpad_acpi: ThinkPad ACPI Extras v0.24
      [13486.746364] thinkpad_acpi: http://ibm-acpi.sf.net/
      [13486.746368] thinkpad_acpi: ThinkPad BIOS HJET15WW(1.01), EC unknown
      [13486.746373] thinkpad_acpi: Lenovo Lenovo LB485, model 814TR01
      [13486.747300] thinkpad_acpi: detected a 8-level brightness capable ThinkPad
      [13486.752435] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
      [13486.752883] Registered led device: tpacpi::thinklight
      [13486.752915] thinkpad_acpi: Standard ACPI backlight interface available, not loading native one
      [13486.753216] thinkpad_acpi: Console audio control enabled, mode: monitor (read only)
      [13486.757147] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input15
      Signed-off-by: default avatarManoj Iyer <manoj.iyer@canonical.com>
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      a4f46bb9
    • AceLan Kao's avatar
      dell-laptop: Fixed typo in touchpad LED quirk · a2174ba2
      AceLan Kao authored
      Fixed the typo introduced from the below commit
      5f1e88f dell-laptop: Add 6 machines to touchpad led quirk
      Reported-by: default avatarCarlos Alberto Lopez Perez <clopez@igalia.com>
      Signed-off-by: default avatarAceLan Kao <acelan.kao@canonical.com>
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      a2174ba2
    • Seth Forshee's avatar
      vga_switcheroo: Don't require handler init callback · e99eac5e
      Seth Forshee authored
      This callback is a no-op in nouveau, and the upcoming apple-gmux
      switcheroo support won't require it either. Rather than forcing drivers
      to stub it out, just make it optional and remove the callback from
      nouveau.
      Signed-off-by: default avatarSeth Forshee <seth.forshee@canonical.com>
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      e99eac5e
    • Seth Forshee's avatar
      vga_switcheroo: Remove assumptions about registration/unregistration ordering · 36704c0c
      Seth Forshee authored
      vga_switcheroo assumes that the handler will be registered before the
      last client, otherwise switching will not be enabled. Likewise it's
      assumed that the handler will not be unregistered without at least one
      client also being unregistered, otherwise switching will remain enabled
      despite no longer having a handler. These assumptions cannot be enforced
      if the handler is in a separate driver from both clients, as with the
      gmux found in Apple laptops. Remove this assumption.
      Signed-off-by: default avatarSeth Forshee <seth.forshee@canonical.com>
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      36704c0c
    • Andreas Heider's avatar
      apple-gmux: Add display mux support · 76b487dd
      Andreas Heider authored
      Add support for the gmux display muxing functionality and register a mux
      handler with vga_switcheroo.
      Signed-off-by: default avatarAndreas Heider <andreas@meetr.de>
      Signed-off-by: default avatarSeth Forshee <seth.forshee@canonical.com>
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      76b487dd
    • Seth Forshee's avatar
      apple-gmux: Fix kconfig dependencies · f94f0f10
      Seth Forshee authored
      Fix the dependencies of apple-gmux to prevent it from being built-in
      when one or more of its dependencies is built as a module. Otherwise it
      can fail to build due to missing symbols.
      
      v2: Add dependency on ACPI to fix build failure when ACPI=n
      Reported-by: default avatarArun Raghavan <arun.raghavan@collabora.co.uk>
      Signed-off-by: default avatarSeth Forshee <seth.forshee@canonical.com>
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      f94f0f10
    • AceLan Kao's avatar
      asus-wmi: record wlan status while controlled by userapp · a50bd128
      AceLan Kao authored
      If the user bit is set, that mean BIOS can't set and record the wlan
      status, it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
      (0x00010012) while we query the wlan status by id ASUS_WMI_DEVID_WLAN
      (0x00010011) through WMI.
      So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
      (0x00010012) while setting the wlan status through WMI.
      This is also the behavior that windows app will do.
      
      Quote from ASUS application engineer
      ===
      When you call WMIMethod(DSTS, 0x00010011) to get WLAN status, it may return
      
      (1) 0x00050001 (On)
      (2) 0x00050000 (Off)
      (3) 0x00030001 (On)
      (4) 0x00030000 (Off)
      (5) 0x00000002 (Unknown)
      
      (1), (2) means that the model has hardware GPIO for WLAN, you can call
      WMIMethod(DEVS, 0x00010011, 1 or 0) to turn WLAN on/off.
      (3), (4) means that the model doesn’t have hardware GPIO, you need to use
      API or driver library to turn WLAN on/off, and call
      WMIMethod(DEVS, 0x00010012, 1 or 0) to set WLAN LED status.
      After you set WLAN LED status, you can see the WLAN status is changed with
      WMIMethod(DSTS, 0x00010011). Because the status is recorded lastly
      (ex: Windows), you can use it for synchronization.
      (5) means that the model doesn’t have WLAN device.
      
      WLAN is the ONLY special case with upper rule.
      
      For other device, like Bluetooth, you just need use
      WMIMethod(DSTS, 0x00010013) to get, and WMIMethod(DEVS, 0x00010013, 1 or 0)
      to set.
      ===
      Signed-off-by: default avatarAceLan Kao <acelan.kao@canonical.com>
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      a50bd128
    • Matthew Garrett's avatar
      apple_gmux: Fix ACPI video unregister · 9f6f955a
      Matthew Garrett authored
      We were only calling acpi_video_unregister() if ACPI video support was built
      in, not if it was a module.
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      9f6f955a
    • Matthew Garrett's avatar
      apple_gmux: Add support for newer hardware · 96ff7056
      Matthew Garrett authored
      New gmux devices have a different method for accessing the registers.
      Update the driver to cope. Incorporates feedback from Bernhard Froemel.
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      Cc: Bernhard Froemel <froemel@vmars.tuwien.ac.at>
      Cc: Seth Forshee <seth.forshee@canonical.com>
      96ff7056
    • Matthew Garrett's avatar
      gmux: Add generic write32 function · 7e30ed6b
      Matthew Garrett authored
      Move the special-cased backlight update function to a generic gmux_write32
      function.
      Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
      Cc: Seth Forshee <seth.forshee@canonical.com>
      7e30ed6b
    • Linus Torvalds's avatar
      Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband · 846b9996
      Linus Torvalds authored
      Pull infiniband/rdma fixes from Roland Dreier:
       "Grab bag of InfiniBand/RDMA fixes:
         - IPoIB fixes for regressions introduced by path database conversion
         - mlx4 fixes for bugs with large memory systems and regressions from
           SR-IOV patches
         - RDMA CM fix for passing bad event up to userspace
         - Other minor fixes"
      
      * tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
        IB/mlx4: Check iboe netdev pointer before dereferencing it
        mlx4_core: Clean up buddy bitmap allocation
        mlx4_core: Fix integer overflow issues around MTT table
        mlx4_core: Allow large mlx4_buddy bitmaps
        IB/srp: Fix a race condition
        IB/qib: Fix error return code in qib_init_7322_variables()
        IB: Fix typos in infiniband drivers
        IB/ipoib: Fix RCU pointer dereference of wrong object
        IB/ipoib: Add missing locking when CM object is deleted
        RDMA/ucma.c: Fix for events with wrong context on iWARP
        RDMA/ocrdma: Don't call vlan_dev_real_dev() for non-VLAN netdevs
        IB/mlx4: Fix possible deadlock on sm_lock spinlock
      846b9996
    • Linus Torvalds's avatar
      Merge tag 'tty-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 225a389b
      Linus Torvalds authored
      Pull TTY fixes from Greg Kroah-Hartman:
       "Here are 4 tiny patches, each fixing a serial driver problem that
        people have reported.
      
        Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
      
      * tag 'tty-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        pmac_zilog,kdb: Fix console poll hook to return instead of loop
        serial: mxs-auart: fix the wrong RTS hardware flow control
        serial: ifx6x60: fix paging fault on spi_register_driver
        serial: Change Kconfig entry for CLPS711X-target
      225a389b
    • Linus Torvalds's avatar
      Merge tag 'staging-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · 557e2e2e
      Linus Torvalds authored
      Pull staging fixes from Greg Kroah-Hartman:
       "Here are some staging driver fixes (and iio driver fixes, they get
        lumped in with the staging stuff due to dependancies) for your 3.6-rc3
        tree.
      
        Nothing major, just a bunch of fixes that people have reported.
      
        Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
      
      * tag 'staging-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (26 commits)
        iio: lm3533-als: Fix build warnings
        staging:iio:ad7780: Mark channels as unsigned
        staging:iio:ad7192: Report offset and scale for temperature channel
        staging:iio:ad7192: Report channel offset
        staging:iio:ad7192: Mark channels as unsigned
        staging:iio:ad7192: Fix setting ACX
        staging:iio:ad7192: Add missing break in switch statement
        staging:iio:ad7793: Fix internal reference value
        staging:iio:ad7793: Follow new IIO naming spec
        staging:iio:ad7793: Fix temperature scale and offset
        staging:iio:ad7793: Report channel offset
        staging:iio:ad7793: Mark channels as unsigned
        staging:iio:ad7793: Add missing break in switch statement
        iio/adjd_s311: Fix potential memory leak in adjd_s311_update_scan_mode()
        iio: frequency: ADF4350: Fix potential reference div factor overflow.
        iio: staging: ad7298_ring: Fix maybe-uninitialized warning
        staging: comedi: usbduxfast: Declare MODULE_FIRMWARE usage
        staging: comedi: usbdux: Declare MODULE_FIRMWARE usage
        staging: comedi: usbduxsigma: Declare MODULE_FIRMWARE usage
        staging: csr: add INET dependancy
        ...
      557e2e2e
    • Linus Torvalds's avatar
      Merge tag 'driver-core-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core · c8391797
      Linus Torvalds authored
      Pull driver core fixes from Greg Kroah-Hartman:
       "Here are two tiny patches, one fixing a dynamic debug problem that the
        printk rework turned up, and the other one fixing an extcon problem
        that people reported.
      
        Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
      
      * tag 'driver-core-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
        extcon: extcon_gpio: Replace gpio_request_one by devm_gpio_request_one
        drivers-core: make structured logging play nice with dynamic-debug
      c8391797
    • Linus Torvalds's avatar
      Merge tag 'char-misc-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · d7d45fed
      Linus Torvalds authored
      Pull Char / Misc driver fixes from Greg Kroah-Hartman:
       "Here are some small misc and w1 driver fixes for 3.6-rc3.  Nothing
        major, just some some bugfixes and a new device id for a w1 driver.
      
        Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
      
      * tag 'char-misc-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        1-Wire: Add support for the maxim ds1825 temperature sensor
        ti-st: Fix check for pdata->chip_awake function pointer
        mei: add mei_quirk_probe function
        mei: fix device stall after wd is stopped
      d7d45fed
    • Linus Torvalds's avatar
      Merge tag 'usb-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 9134e7d2
      Linus Torvalds authored
      Pull USB patches from Greg Kroah-Hartman:
       "Here are a number of small USB patches for 3.6-rc3.
      
        The "large" one is just a number of device id updates to the option
        driver, done by the manufacturer, properly fixing up the device ids
        based on shipping devices.
      
        Other than that, some gadget driver fixes, the obligitary XHCI
        patches, and some other device ids and bugs fixed.
      
        Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
      
      * tag 'usb-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (26 commits)
        USB: qcserial: fix port handling on Gobi 1K and 2K+
        USB: serial: Fix mos7840 timeout
        USB: option: add ZTE K5006-Z
        usb: gadget: u_ether: fix kworker 100% CPU issue with still used interfaces in eth_stop
        usb: host: tegra: fix warning messages in ehci_remove
        usb: host: mips: sead3: Update for EHCI register structure.
        usb: renesas_usbhs: fixup resume method for autonomy mode
        usb: renesas_usbhs: mod_host: add missing .bus_suspend/resume
        update MAINTAINERS for Oliver Neukum
        usb: usb_wwan: resume/suspend can be called after port is gone
        usb: serial: prevent suspend/resume from racing against probe/remove
        usb: usb_wwan: replace release and disconnect with a port_remove hook
        usb: serial: mos7840: Fixup mos7840_chars_in_buffer()
        USB: isp1362-hcd.c: usb message always saved in case of underrun
        OMAP: USB : Fix the EHCI enumeration and core retention issue
        usb: chipidea: fix and improve dependencies if usb host or gadget support is built as module
        USB: support the new interfaces of Huawei Data Card devices in option driver
        USB: ftdi_sio: Add VID/PID for Kondo Serial USB
        xhci: Switch PPT ports to EHCI on shutdown.
        xhci: Fix bug after deq ptr set to link TRB.
        ...
      9134e7d2
    • Randy Dunlap's avatar
      scripts/kernel-doc: fix fatal script error · 0df7c0e3
      Randy Dunlap authored
      Fix fatal error in scripts/kernel-doc by ignoring the "__weak" attribute:
      
        Error(drivers/pci/pci.c:2820): cannot understand prototype: 'char * __weak pcibios_setup(char *str) '
      Signed-off-by: default avatarRandy Dunlap <rdunlap@xenotime.net>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0df7c0e3
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security · 0b0402d4
      Linus Torvalds authored
      Pull a Yama bugfix from James Morris.
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
        Yama: access task_struct->comm directly
      0b0402d4
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming · 9d0f8140
      Linus Torvalds authored
      Pull C6X atomic64 support from Mark Salter:
       "Enable atomic64 ops in C6X
         - define L1_CACHE_SHIFT
         - select GENERIC_ATOMIC64"
      
      * tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
        C6X: select GENERIC_ATOMIC64
        C6X: add Lx_CACHE_SHIFT defines
      9d0f8140
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · ef824bfb
      Linus Torvalds authored
      Pull ext4 bug fixes from Ted Ts'o:
       "The following are all bug fixes and regressions.  The most notable are
        the ones which cause problems for ext4 on RAID --- a performance
        problem when mounting very large filesystems, and a kernel OOPS when
        doing an rm -rf on large directory hierarchies on fast devices."
      
      * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: fix kernel BUG on large-scale rm -rf commands
        ext4: fix long mount times on very big file systems
        ext4: don't call ext4_error while block group is locked
        ext4: avoid kmemcheck complaint from reading uninitialized memory
        ext4: make sure the journal sb is written in ext4_clear_journal_err()
      ef824bfb
    • Ian Kent's avatar
      autofs4 - fix expire check · d807ff83
      Ian Kent authored
      In some cases when an autofs indirect mount is contained in a file
      system that is marked as shared (such as when systemd does the
      equivalent of "mount --make-rshared /" early in the boot), mounts
      stop expiring.
      
      When this happens the first expiry check on a mountpoint dentry in
      autofs_expire_indirect() sees a mountpoint dentry with a higher
      than minimal reference count. Consequently the dentry is condidered
      busy and the actual expiry check is never done.
      
      This particular check was originally meant as an optimisation to
      detect a path walk in progress but with the addition of rcu-walk
      it can be ineffective anyway.
      
      Removing the test allows automounts to expire again since the
      actual expire check doesn't rely on the dentry reference count.
      Signed-off-by: default avatarIan Kent <raven@themaw.net>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d807ff83
    • Theodore Ts'o's avatar
      ext4: fix kernel BUG on large-scale rm -rf commands · 89a4e48f
      Theodore Ts'o authored
      Commit 968dee77: "ext4: fix hole punch failure when depth is greater
      than 0" introduced a regression in v3.5.1/v3.6-rc1 which caused kernel
      crashes when users ran run "rm -rf" on large directory hierarchy on
      ext4 filesystems on RAID devices:
      
          BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
      
          Process rm (pid: 18229, threadinfo ffff8801276bc000, task ffff880123631710)
          Call Trace:
           [<ffffffff81236483>] ? __ext4_handle_dirty_metadata+0x83/0x110
           [<ffffffff812353d3>] ext4_ext_truncate+0x193/0x1d0
           [<ffffffff8120a8cf>] ? ext4_mark_inode_dirty+0x7f/0x1f0
           [<ffffffff81207e05>] ext4_truncate+0xf5/0x100
           [<ffffffff8120cd51>] ext4_evict_inode+0x461/0x490
           [<ffffffff811a1312>] evict+0xa2/0x1a0
           [<ffffffff811a1513>] iput+0x103/0x1f0
           [<ffffffff81196d84>] do_unlinkat+0x154/0x1c0
           [<ffffffff8118cc3a>] ? sys_newfstatat+0x2a/0x40
           [<ffffffff81197b0b>] sys_unlinkat+0x1b/0x50
           [<ffffffff816135e9>] system_call_fastpath+0x16/0x1b
          Code: 8b 4d 20 0f b7 41 02 48 8d 04 40 48 8d 04 81 49 89 45 18 0f b7 49 02 48 83 c1 01 49 89 4d 00 e9 ae f8 ff ff 0f 1f 00 49 8b 45 28 <48> 8b 40 28 49 89 45 20 e9 85 f8 ff ff 0f 1f 80 00 00 00
      
          RIP  [<ffffffff81233164>] ext4_ext_remove_space+0xa34/0xdf0
      
      This could be reproduced as follows:
      
      The problem in commit 968dee77 was that caused the variable 'i' to
      be left uninitialized if the truncate required more space than was
      available in the journal.  This resulted in the function
      ext4_ext_truncate_extend_restart() returning -EAGAIN, which caused
      ext4_ext_remove_space() to restart the truncate operation after
      starting a new jbd2 handle.
      Reported-by: default avatarMaciej Żenczykowski <maze@google.com>
      Reported-by: default avatarMarti Raudsepp <marti@juffo.org>
      Tested-by: default avatarFengguang Wu <fengguang.wu@intel.com>
      Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
      Cc: stable@vger.kernel.org
      89a4e48f
    • Theodore Ts'o's avatar
      ext4: fix long mount times on very big file systems · 0548bbb8
      Theodore Ts'o authored
      Commit 8aeb00ff: "ext4: fix overhead calculation used by
      ext4_statfs()" introduced a O(n**2) calculation which makes very large
      file systems take forever to mount.  Fix this with an optimization for
      non-bigalloc file systems.  (For bigalloc file systems the overhead
      needs to be set in the the superblock.)
      Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
      Cc: stable@vger.kernel.org
      0548bbb8
    • Theodore Ts'o's avatar
      ext4: don't call ext4_error while block group is locked · 7a4c5de2
      Theodore Ts'o authored
      While in ext4_validate_block_bitmap(), if an block allocation bitmap
      is found to be invalid, we call ext4_error() while the block group is
      still locked.  This causes ext4_commit_super() to call a function
      which might sleep while in an atomic context.
      
      There's no need to keep the block group locked at this point, so hoist
      the ext4_error() call up to ext4_validate_block_bitmap() and release
      the block group spinlock before calling ext4_error().
      
      The reported stack trace can be found at:
      
      	http://article.gmane.org/gmane.comp.file-systems.ext4/33731Reported-by: default avatarDave Jones <davej@redhat.com>
      Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
      Cc: stable@vger.kernel.org
      7a4c5de2
    • Kees Cook's avatar
      Yama: access task_struct->comm directly · 7612bfee
      Kees Cook authored
      The core ptrace access checking routine holds a task lock, and when
      reporting a failure, Yama takes a separate task lock. To avoid a
      potential deadlock with two ptracers taking the opposite locks, do not
      use get_task_comm() and just use ->comm directly since accuracy is not
      important for the report.
      Reported-by: default avatarFengguang Wu <fengguang.wu@intel.com>
      Suggested-by: default avatarOleg Nesterov <oleg@redhat.com>
      CC: stable@vger.kernel.org
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      Acked-by: default avatarJohn Johansen <john.johansen@canonical.com>
      Signed-off-by: default avatarJames Morris <james.l.morris@oracle.com>
      7612bfee
  3. 16 Aug, 2012 11 commits