UBUNTU: Start new release

Ignore: yes
Signed-off-by: Brad Figg <brad.figg@canonical.com>
UBUNTU: Bump ABI

Ignore: yes
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
UBUNTU: [Config] CONFIG_NFS_V4_1=y

BugLink: http://bugs.launchpad.net/bugs/1111416

Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
UBUNTU: [Config] re-disable CONFIG_SOUND_OSS_PRECLAIM

We intended to turn off CONFIG_SOUND_OSS in maverick timeframe:

    https://lists.ubuntu.com/archives/kernel-team/2010-May/010647.html

We inadvertantly reenabled it for some early ARM work in the commit below:

  commit d5a54f43f357d4814f2c3d53ca3d5c3f6fddebe0
  Author: Andy Whitcroft <apw@canonical.com>
  Date:   Thu Jan 12 14:32:10 2012 +0000

    UBUNTU: [Config] pull ARM sound modules =m

These being enabled prevent the very userspace shims we intended to use for
OSS consumers, given that none of them are enabled in the current kernel.

Turn off CONFIG_SOUND_OSS_PRECLAIM as that is actually the bit which breaks
other users.  If you do use the in theory redundant driver it will still
function with this change.

BugLink: http://bugs.launchpad.net/bugs/1105230
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Colin King <colin.king@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
tmpfs: fix use-after-free of mempolicy object

CVE-2013-1767

BugLink: http://bugs.launchpad.net/bugs/1143815

The tmpfs remount logic preserves filesystem mempolicy if the mpol=M
option is not specified in the remount request.  A new policy can be
specified if mpol=M is given.

Before this patch remounting an mpol bound tmpfs without specifying
mpol= mount option in the remount request would set the filesystem's
mempolicy object to a freed mempolicy object.

To reproduce the problem boot a DEBUG_PAGEALLOC kernel and run:
    # mkdir /tmp/x

    # mount -t tmpfs -o size=100M,mpol=interleave nodev /tmp/x

    # grep /tmp/x /proc/mounts
    nodev /tmp/x tmpfs rw,relatime,size=102400k,mpol=interleave:0-3 0 0

    # mount -o remount,size=200M nodev /tmp/x

    # grep /tmp/x /proc/mounts
    nodev /tmp/x tmpfs rw,relatime,size=204800k,mpol=??? 0 0
        # note ? garbage in mpol=... output above

    # dd if=/dev/zero of=/tmp/x/f count=1
        # panic here

Panic:
    BUG: unable to handle kernel NULL pointer dereference at           (null)
    IP: [<          (null)>]           (null)
    [...]
    Oops: 0010 [#1] SMP DEBUG_PAGEALLOC
    Call Trace:
      mpol_shared_policy_init+0xa5/0x160
      shmem_get_inode+0x209/0x270
      shmem_mknod+0x3e/0xf0
      shmem_create+0x18/0x20
      vfs_create+0xb5/0x130
      do_last+0x9a1/0xea0
      path_openat+0xb3/0x4d0
      do_filp_open+0x42/0xa0
      do_sys_open+0xfe/0x1e0
      compat_sys_open+0x1b/0x20
      cstar_dispatch+0x7/0x1f

Non-debug kernels will not crash immediately because referencing the
dangling mpol will not cause a fault.  Instead the filesystem will
reference a freed mempolicy object, which will cause unpredictable
behavior.

The problem boils down to a dropped mpol reference below if
shmem_parse_options() does not allocate a new mpol:

    config = *sbinfo
    shmem_parse_options(data, &config, true)
    mpol_put(sbinfo->mpol)
    sbinfo->mpol = config.mpol  /* BUG: saves unreferenced mpol */

This patch avoids the crash by not releasing the mempolicy if
shmem_parse_options() doesn't create a new mpol.

How far back does this issue go? I see it in both 2.6.36 and 3.3.  I did
not look back further.

Signed-off-by: Greg Thelen <gthelen@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 5f00110f7273f9ff04ac69a5f85bb535a4fd0987)
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
sunvdc: Fix off-by-one in generic_request().

BugLink: http://bugs.launchpad.net/bugs/1150557

[ Upstream commit f4d9605434c0fd4cc8639bf25cfc043418c52362 ]

The 'operations' bitmap corresponds one-for-one with the operation
codes, no adjustment is necessary.

Reported-by: Mark Kettenis <mark.kettenis@xs4all.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
genirq: Avoid deadlock in spurious handling

BugLink: http://bugs.launchpad.net/bugs/1150557

commit e716efde75267eab919cdb2bef5b2cb77f305326 upstream.

commit 52553ddf(genirq: fix regression in irqfixup, irqpoll)
introduced a potential deadlock by calling the action handler with the
irq descriptor lock held.

Remove the call and let the handling code run even for an interrupt
where only a single action is registered. That matches the goal of
the above commit and avoids the deadlock.

Document the confusing action = desc->action reload in the handling
loop while at it.

Reported-and-tested-by: "Wang, Warner" <warner.wang@hp.com>
Tested-by: Edward Donovan <edward.donovan@numble.net>
Cc: "Wang, Song-Bo (Stoney)" <song-bo.wang@hp.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
KVM: s390: Handle hosts not supporting s390-virtio.

BugLink: http://bugs.launchpad.net/bugs/1150557

commit 55c171a6d90dc0574021f9c836127cfd1a7d2e30 upstream.

Running under a kvm host does not necessarily imply the presence of
a page mapped above the main memory with the virtio information;
however, the code includes a hard coded access to that page.

Instead, check for the presence of the page and exit gracefully
before we hit an addressing exception if it does not exist.

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
workqueue: consider work function when searching for busy work items

BugLink: http://bugs.launchpad.net/bugs/1150557

commit a2c1c57be8d9fd5b716113c8991d3d702eeacf77 upstream.

To avoid executing the same work item concurrenlty, workqueue hashes
currently busy workers according to their current work items and looks
up the the table when it wants to execute a new work item.  If there
already is a worker which is executing the new work item, the new item
is queued to the found worker so that it gets executed only after the
current execution finishes.

Unfortunately, a work item may be freed while being executed and thus
recycled for different purposes.  If it gets recycled for a different
work item and queued while the previous execution is still in
progress, workqueue may make the new work item wait for the old one
although the two aren't really related in any way.

In extreme cases, this false dependency may lead to deadlock although
it's extremely unlikely given that there aren't too many self-freeing
work item users and they usually don't wait for other work items.

To alleviate the problem, record the current work function in each
busy worker and match it together with the work item address in
find_worker_executing_work().  While this isn't complete, it ensures
that unrelated work items don't interact with each other and in the
very unlikely case where a twisted wq user triggers it, it's always
onto itself making the culprit easy to spot.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Andrey Isakov <andy51@gmx.ru>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=51701
[bwh: Backported to 3.2:
 - Adjust context
 - Incorporate earlier logging cleanup in process_one_work() from
   044c782ce3a9 ('workqueue: fix checkpatch issues')]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
v4l: Reset subdev v4l2_dev field to NULL if registration fails

BugLink: http://bugs.launchpad.net/bugs/1150557

commit 317efce991620adc589b3005b9baed433dcb2a56 upstream.

When subdev registration fails the subdev v4l2_dev field is left to a
non-NULL value. Later calls to v4l2_device_unregister_subdev() will
consider the subdev as registered and will module_put() the subdev
module without any matching module_get().
Fix this by setting the subdev v4l2_dev field to NULL in
v4l2_device_register_subdev() when the function fails.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[bwh: Backported to 3.2: adjust context, filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
omap_vout: find_vma() needs ->mmap_sem held

BugLink: http://bugs.launchpad.net/bugs/1150557

commit 55ee64b30a38d688232e5eb2860467dddc493573 upstream.

Walking rbtree while it's modified is a Bad Idea(tm); besides,
the result of find_vma() can be freed just as it's getting returned
to caller.  Fortunately, it's easy to fix - just take ->mmap_sem a bit
earlier (and don't bother with find_vma() at all if virtp >= PAGE_OFFSET -
in that case we don't even look at its result).

While we are at it, what prevents VIDIOC_PREPARE_BUF calling
v4l_prepare_buf() -> (e.g) vb2_ioctl_prepare_buf() -> vb2_prepare_buf() ->
__buf_prepare() -> __qbuf_userptr() -> vb2_vmalloc_get_userptr() -> find_vma(),
AFAICS without having taken ->mmap_sem anywhere in process?  The code flow
is bloody convoluted and depends on a bunch of things done by initialization,
so I certainly might've missed something...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Archit Taneja <archit@ti.com>
Cc: Prabhakar Lad <prabhakar.lad@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
dca: check against empty dca_domains list before unregister provider

BugLink: http://bugs.launchpad.net/bugs/1150557

commit c419fcfd071cf34ba00f9f65282583772d2655e7 upstream.

When providers get blocked unregister_dca_providers() is called ending up
with dca_providers and dca_domain lists emptied. Dca should be prevented from
trying to unregister any provider if dca_domain list is found empty.

Reported-by: Jiang Liu <jiang.liu@huawei.com>
Tested-by: Gaohuai Han <hangaohuai@huawei.com>
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <djbw@fb.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
powerpc/eeh: Fix crash when adding a device in a slot with DDW

BugLink: http://bugs.launchpad.net/bugs/1150557

commit 6a040ce72598159a74969a2d01ab0ba5ee6536b3 upstream.

The DDW code uses a eeh_dev struct from the pci_dev. However, this is
not set until eeh_add_device_late is called.

Since pci_bus_add_devices is called before eeh_add_device_late, the PCI
devices are added to the bus, making drivers' probe hooks to be called.
These will call set_dma_mask, which will call the DDW code, which will
require the eeh_dev struct from pci_dev. This would result in a crash,
due to a NULL dereference.

Calling eeh_add_device_late after pci_bus_add_devices would make the
system BUG, because device files shouldn't be added to devices there
were not added to the system. So, a new function is needed to add such
files only after pci_bus_add_devices have been called.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ext4: return ENOMEM if sb_getblk() fails

BugLink: http://bugs.launchpad.net/bugs/1150557

commit 860d21e2c585f7ee8a4ecc06f474fdc33c9474f4 upstream.

The only reason for sb_getblk() failing is if it can't allocate the
buffer_head.  So ENOMEM is more appropriate than EIO.  In addition,
make sure that the file system is marked as being inconsistent if
sb_getblk() fails.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
[bwh: Backported to 3.2:
 - Adjust context
 - Drop change to inline.c
 - Call to ext4_ext_check() from ext4_ext_find_extent() is conditional]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
pcmcia/vrc4171: Add missing spinlock init

BugLink: http://bugs.launchpad.net/bugs/1150557

commit 811af9723859884f2f771f3174f3ddedab7c53b5 upstream.

It doesn't seem this spinlock was properly initialized. This bug was
introduced by commit 7a410e8d4d97457c8c381e2de9cdc7bd3306badc.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Purge existing TLB entries in set_pte_at and ptep_set_wrprotect

BugLink: http://bugs.launchpad.net/bugs/1150557

commit 7139bc1579901b53db7e898789e916ee2fb52d78 upstream.

This patch goes a long way toward fixing the minifail bug, and
it  significantly improves the stability of SMP machines such as
the rp3440.  When write  protecting a page for COW, we need to
purge the existing translation.  Otherwise, the COW break
doesn't occur as expected because the TLB may still have a stale entry
which allows writes.

[jejb: fix up checkpatch errors]
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ARM: PXA3xx: program the CSMSADRCFG register

BugLink: http://bugs.launchpad.net/bugs/1150557

commit d107a204154ddd79339203c2deeb7433f0cf6777 upstream.

The Chip Select Configuration Register must be programmed to 0x2 in
order to achieve the correct behavior of the Static Memory Controller.

Without this patch devices wired to DFI and accessed through SMC cannot
be accessed after resume from S2.

Do not rely on the boot loader to program the CSMSADRCFG register by
programming it in the kernel smemc module.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
USB: option: add and update Alcatel modems

BugLink: http://bugs.launchpad.net/bugs/1150557

commit f8f0302bbcbd1b14655bef29f6996a2152be559d upstream.

Adding three currently unsupported modems based on information
from .inf driver files:

  Diag  VID_1BBB&PID_0052&MI_00
  AGPS  VID_1BBB&PID_0052&MI_01
  VOICE VID_1BBB&PID_0052&MI_02
  AT    VID_1BBB&PID_0052&MI_03
  Modem VID_1BBB&PID_0052&MI_05
  wwan  VID_1BBB&PID_0052&MI_06

  Diag  VID_1BBB&PID_00B6&MI_00
  AT    VID_1BBB&PID_00B6&MI_01
  Modem VID_1BBB&PID_00B6&MI_02
  wwan  VID_1BBB&PID_00B6&MI_03

  Diag  VID_1BBB&PID_00B7&MI_00
  AGPS  VID_1BBB&PID_00B7&MI_01
  VOICE VID_1BBB&PID_00B7&MI_02
  AT    VID_1BBB&PID_00B7&MI_03
  Modem VID_1BBB&PID_00B7&MI_04
  wwan  VID_1BBB&PID_00B7&MI_05

Updating the blacklist info for the X060S_X200 and X220_X500D,
reserving interfaces for a wwan driver, based on

  wwan VID_1BBB&PID_0000&MI_04
  wwan VID_1BBB&PID_0017&MI_06

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
quota: autoload the quota_v2 module for QFMT_VFS_V1 quota format

BugLink: http://bugs.launchpad.net/bugs/1150557

commit c3ad83d9efdfe6a86efd44945a781f00c879b7b4 upstream.

Otherwise, ext4 file systems with the quota featured enable will get a
very confusing "No such process" error message if the quota code is
built as a module and the quota_v2 module has not been loaded.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ext4: fix possible use-after-free with AIO

BugLink: http://bugs.launchpad.net/bugs/1150557

commit 091e26dfc156aeb3b73bc5c5f277e433ad39331c upstream.

Running AIO is pinning inode in memory using file reference. Once AIO
is completed using aio_complete(), file reference is put and inode can
be freed from memory. So we have to be sure that calling aio_complete()
is the last thing we do with the inode.

Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>