2.6.36-rc1 commit 21d0d443 "rmap:
resurrect page_address_in_vma anon_vma check" was right to resurrect
that check; but now that it's comparing anon_vma->roots instead of
just anon_vmas, there's a danger of oopsing on a NULL anon_vma.

In most cases no NULL anon_vma ever gets here; but it turns out that
occasionally KSM, when enabled on a forked or forking process, will
itself call page_address_in_vma() on a "half-KSM" page left over from
an earlier failed attempt to merge - whose page_anon_vma() is NULL.

It's my bug that those should be getting here at all: I thought they
were already dealt with, this oops proves me wrong, I'll fix it in
the next release - such pages are effectively pinned until their
process exits, since rmap cannot find their ptes (though swapoff can).

For now just work around it by making page_address_in_vma() safe (and
add a comment on why that check is wanted anyway).  A similar check
in __page_check_anon_rmap() is safe because do_page_add_anon_rmap()
already excluded KSM pages.
Signed-off-by: NHugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  cifs: prevent infinite recursion in cifs_reconnect_tcon
  cifs: set backing_dev_info on new S_ISREG inodes

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, hpet: Fix bogus error check in hpet_assign_irq()
  x86, irq: Plug memory leak in sparse irq
  x86, cpu: After uncapping CPUID, re-run CPU feature detection

flush_icache_range() is given virtual addresses to describe the region.  It
deals with these by attempting to translate them through the current set of
page tables.

This is fine for userspace memory and vmalloc()'d areas as they are governed by
page tables.  However, since the regions above 0x80000000 aren't translated
through the page tables by the MMU, the kernel doesn't bother to set up page
tables for them (see paging_init()).

This means flush_icache_range() as it stands cannot be used to flush regions of
the VM area between 0x80000000 and 0x9fffffff where the kernel resides if the
data cache is operating in WriteBack mode.

To fix this, make flush_icache_range() first check for addresses in the upper
half of VM space and deal with them appropriately, before dealing with any
range in the page table mapped area.

Ordinarily, this is not a problem, but it has the capacity to make kprobes and
kgdb malfunction.  It should not affect gdbstub, signal frame setup or module
loading as gdb has its own flush functions, and the others take place in the
page table mapped area only.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NAkira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  vmwgfx: Fix fb VRAM pinning failure due to fragmentation
  vmwgfx: Remove initialisation of dev::devname
  vmwgfx: Enable use of the vblank system
  vmwgfx: vt-switch (master drop) fixes
  drm/vmwgfx: Fix breakage introduced by commit "drm: block userspace under allocating buffer and having drivers overwrite it (v2)"
  drm: Hold the mutex when dropping the last GEM reference (v2)
  drm/gem: handlecount isn't really a kref so don't make it one.
  drm: i810/i830: fix locked ioctl variant
  drm/radeon/kms: add quirk for MSI K9A2GM motherboard
  drm/radeon/kms: fix potential segfault in r600_ioctl_wait_idle
  drm: Prune GEM vma entries
  drm/radeon/kms: fix up encoder info messages for DFP6
  drm/radeon: fix PCI ID 5657 to be an RV410

* 'for-linus/i2c/2636-rc5' of git://git.fluff.org/bjdooks/linux:
  i2c-s3c2410: fix calculation of SDA line delay
  i2c-davinci: Fix race when setting up for TX
  i2c-octeon: Return -ETIMEDOUT in octeon_i2c_wait() on timeout

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: invoke DSDT corruption workaround on all Toshiba Satellite
  ACPI, APEI, Fix ERST MOVE_DATA instruction implementation
  ACPI: fan: Fix more unbalanced code block
  ACPI: acpi_pad: simplify code to avoid false gcc build warning
  ACPI, APEI, Fix error path for memory allocation
  ACPI, APEI, HEST Fix the unsuitable usage of platform_data
  ACPI, APEI, Fix acpi_pre_map() return value
  ACPI, APEI, Fix APEI related table size checking
  ACPI: Disable Windows Vista compatibility for Toshiba P305D
  ACPI: Kconfig: fix typo.
  ACPI: add missing __percpu markup in arch/x86/kernel/acpi/cstate.c
  ACPI: Fix typos
  ACPI video: fix a poor warning message
  ACPI: fix build warnings resulting from merge window conflict
  ACPI: EC: add Vista incompatibility DMI entry for Toshiba Satellite L355
  ACPI: expand Vista blacklist to include SP1 and SP2
  ACPI: delete ZEPTO idle=nomwait DMI quirk
  ACPI: enable repeated PCIEXP wakeup by clearing PCIEXP_WAKE_STS on resume
  PM / ACPI: Blacklist systems known to require acpi_sleep=nonvs
  ACPI: Don't report current_now if battery reports in mWh

* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
  intel_idle: Voluntary leave_mm before entering deeper
  acpi_idle: add missing \n to printk
  intel_idle: add missing __percpu markup
  intel_idle: Change mode 755 => 644
  cpuidle: Fix typos
  intel_idle: PCI quirk to prevent Lenovo Ideapad s10-3 boot hang

Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6

* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
  omap: McBSP: tx_irq_completion used in rx_irq_handler
  omap: Fix compile dependency to LEDS_CLASS

Prevent from recursively locking the reiserfs lock in reiserfs_unpack()
because we may call journal_begin() that requires the lock to be taken
only once, otherwise it won't be able to release the lock while taking
other mutexes, ending up in inverted dependencies between the journal
mutex and the reiserfs lock for example.

This fixes:

  =======================================================
  [ INFO: possible circular locking dependency detected ]
  2.6.35.4.4a #3
  -------------------------------------------------------
  lilo/1620 is trying to acquire lock:
   (&journal->j_mutex){+.+...}, at: [<d0325bff>] do_journal_begin_r+0x7f/0x340 [reiserfs]

  but task is already holding lock:
   (&REISERFS_SB(s)->lock){+.+.+.}, at: [<d032a278>] reiserfs_write_lock+0x28/0x40 [reiserfs]

  which lock already depends on the new lock.

  the existing dependency chain (in reverse order) is:

  -> #1 (&REISERFS_SB(s)->lock){+.+.+.}:
         [<c10562b7>] lock_acquire+0x67/0x80
         [<c12facad>] __mutex_lock_common+0x4d/0x410
         [<c12fb0c8>] mutex_lock_nested+0x18/0x20
         [<d032a278>] reiserfs_write_lock+0x28/0x40 [reiserfs]
         [<d0325c06>] do_journal_begin_r+0x86/0x340 [reiserfs]
         [<d0325f77>] journal_begin+0x77/0x140 [reiserfs]
         [<d0315be4>] reiserfs_remount+0x224/0x530 [reiserfs]
         [<c10b6a20>] do_remount_sb+0x60/0x110
         [<c10cee25>] do_mount+0x625/0x790
         [<c10cf014>] sys_mount+0x84/0xb0
         [<c12fca3d>] syscall_call+0x7/0xb

  -> #0 (&journal->j_mutex){+.+...}:
         [<c10560f6>] __lock_acquire+0x1026/0x1180
         [<c10562b7>] lock_acquire+0x67/0x80
         [<c12facad>] __mutex_lock_common+0x4d/0x410
         [<c12fb0c8>] mutex_lock_nested+0x18/0x20
         [<d0325bff>] do_journal_begin_r+0x7f/0x340 [reiserfs]
         [<d0325f77>] journal_begin+0x77/0x140 [reiserfs]
         [<d0326271>] reiserfs_persistent_transaction+0x41/0x90 [reiserfs]
         [<d030d06c>] reiserfs_get_block+0x22c/0x1530 [reiserfs]
         [<c10db9db>] __block_prepare_write+0x1bb/0x3a0
         [<c10dbbe6>] block_prepare_write+0x26/0x40
         [<d030b738>] reiserfs_prepare_write+0x88/0x170 [reiserfs]
         [<d03294d6>] reiserfs_unpack+0xe6/0x120 [reiserfs]
         [<d0329782>] reiserfs_ioctl+0x272/0x320 [reiserfs]
         [<c10c3188>] vfs_ioctl+0x28/0xa0
         [<c10c3bbd>] do_vfs_ioctl+0x32d/0x5c0
         [<c10c3eb3>] sys_ioctl+0x63/0x70
         [<c12fca3d>] syscall_call+0x7/0xb

  other info that might help us debug this:

  2 locks held by lilo/1620:
   #0:  (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<d032945a>] reiserfs_unpack+0x6a/0x120 [reiserfs]
   #1:  (&REISERFS_SB(s)->lock){+.+.+.}, at: [<d032a278>] reiserfs_write_lock+0x28/0x40 [reiserfs]

  stack backtrace:
  Pid: 1620, comm: lilo Not tainted 2.6.35.4.4a #3
  Call Trace:
   [<c10560f6>] __lock_acquire+0x1026/0x1180
   [<c10562b7>] lock_acquire+0x67/0x80
   [<c12facad>] __mutex_lock_common+0x4d/0x410
   [<c12fb0c8>] mutex_lock_nested+0x18/0x20
   [<d0325bff>] do_journal_begin_r+0x7f/0x340 [reiserfs]
   [<d0325f77>] journal_begin+0x77/0x140 [reiserfs]
   [<d0326271>] reiserfs_persistent_transaction+0x41/0x90 [reiserfs]
   [<d030d06c>] reiserfs_get_block+0x22c/0x1530 [reiserfs]
   [<c10db9db>] __block_prepare_write+0x1bb/0x3a0
   [<c10dbbe6>] block_prepare_write+0x26/0x40
   [<d030b738>] reiserfs_prepare_write+0x88/0x170 [reiserfs]
   [<d03294d6>] reiserfs_unpack+0xe6/0x120 [reiserfs]
   [<d0329782>] reiserfs_ioctl+0x272/0x320 [reiserfs]
   [<c10c3188>] vfs_ioctl+0x28/0xa0
   [<c10c3bbd>] do_vfs_ioctl+0x32d/0x5c0
   [<c10c3eb3>] sys_ioctl+0x63/0x70
   [<c12fca3d>] syscall_call+0x7/0xb
Reported-by: NJarek Poplawski <jarkao2@gmail.com>
Tested-by: NJarek Poplawski <jarkao2@gmail.com>
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: All since 2.6.32 <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The reiserfs mutex already depends on the inode mutex, so we can't lock
the inode mutex in reiserfs_unpack() without using the safe locking API,
because reiserfs_unpack() is always called with the reiserfs mutex locked.

This fixes:

  =======================================================
  [ INFO: possible circular locking dependency detected ]
  2.6.35c #13
  -------------------------------------------------------
  lilo/1606 is trying to acquire lock:
   (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<d0329450>] reiserfs_unpack+0x60/0x110 [reiserfs]

  but task is already holding lock:
   (&REISERFS_SB(s)->lock){+.+.+.}, at: [<d032a268>] reiserfs_write_lock+0x28/0x40 [reiserfs]

  which lock already depends on the new lock.

  the existing dependency chain (in reverse order) is:

  -> #1 (&REISERFS_SB(s)->lock){+.+.+.}:
         [<c1056347>] lock_acquire+0x67/0x80
         [<c12f083d>] __mutex_lock_common+0x4d/0x410
         [<c12f0c58>] mutex_lock_nested+0x18/0x20
         [<d032a268>] reiserfs_write_lock+0x28/0x40 [reiserfs]
         [<d0329e9a>] reiserfs_lookup_privroot+0x2a/0x90 [reiserfs]
         [<d0316b81>] reiserfs_fill_super+0x941/0xe60 [reiserfs]
         [<c10b7d17>] get_sb_bdev+0x117/0x170
         [<d0313e21>] get_super_block+0x21/0x30 [reiserfs]
         [<c10b74ba>] vfs_kern_mount+0x6a/0x1b0
         [<c10b7659>] do_kern_mount+0x39/0xe0
         [<c10cebe0>] do_mount+0x340/0x790
         [<c10cf0b4>] sys_mount+0x84/0xb0
         [<c12f25cd>] syscall_call+0x7/0xb

  -> #0 (&sb->s_type->i_mutex_key#8){+.+.+.}:
         [<c1056186>] __lock_acquire+0x1026/0x1180
         [<c1056347>] lock_acquire+0x67/0x80
         [<c12f083d>] __mutex_lock_common+0x4d/0x410
         [<c12f0c58>] mutex_lock_nested+0x18/0x20
         [<d0329450>] reiserfs_unpack+0x60/0x110 [reiserfs]
         [<d0329772>] reiserfs_ioctl+0x272/0x320 [reiserfs]
         [<c10c3228>] vfs_ioctl+0x28/0xa0
         [<c10c3c5d>] do_vfs_ioctl+0x32d/0x5c0
         [<c10c3f53>] sys_ioctl+0x63/0x70
         [<c12f25cd>] syscall_call+0x7/0xb

  other info that might help us debug this:

  1 lock held by lilo/1606:
   #0:  (&REISERFS_SB(s)->lock){+.+.+.}, at: [<d032a268>] reiserfs_write_lock+0x28/0x40 [reiserfs]

  stack backtrace:
  Pid: 1606, comm: lilo Not tainted 2.6.35c #13
  Call Trace:
   [<c1056186>] __lock_acquire+0x1026/0x1180
   [<c1056347>] lock_acquire+0x67/0x80
   [<c12f083d>] __mutex_lock_common+0x4d/0x410
   [<c12f0c58>] mutex_lock_nested+0x18/0x20
   [<d0329450>] reiserfs_unpack+0x60/0x110 [reiserfs]
   [<d0329772>] reiserfs_ioctl+0x272/0x320 [reiserfs]
   [<c10c3228>] vfs_ioctl+0x28/0xa0
   [<c10c3c5d>] do_vfs_ioctl+0x32d/0x5c0
   [<c10c3f53>] sys_ioctl+0x63/0x70
   [<c12f25cd>] syscall_call+0x7/0xb
Reported-by: NJarek Poplawski <jarkao2@gmail.com>
Tested-by: NJarek Poplawski <jarkao2@gmail.com>
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: <stable@kernel.org>		[2.6.32 and later]
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NBen Dooks <ben-linux@fluff.org>
Acked-by: NRussell King <rmk@arm.linux.org.uk>
Cc: Kyungmin Park <kmpark@infradead.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

I moved couple years ago, so let's update my email and snail mail.

And I do not have any access to Matrox hardware anymore, and I'm quite
unresponsive to matroxfb bug reports (sorry Alan), so saying that I'm
maintainer is a bit far fetched.

For ncpfs I do not use ncpfs in my daily life either, but at least I can
test that one, so I can stay listed here for odd fixes.
Signed-off-by: NPetr Vandrovec <petr@vandrovec.name>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Having the limits file world readable will ease the task of system
management on systems where root privileges might be restricted.

Having admin restricted with root priviledges, he/she could not check
other users process' limits.

Also it'd align with most of the /proc stat files.
Signed-off-by: NJiri Olsa <jolsa@redhat.com>
Acked-by: NNeil Horman <nhorman@tuxdriver.com>
Cc: Eugene Teo <eugene@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

If the original list is a POT in length, the first callback from line 73
will pass a==b both pointing to the original list_head.  This is dangerous
because the 'list_sort()' user can use 'container_of()' and accesses the
"containing" object, which does not necessary exist for the list head.  So
the user can access RAM which does not belong to him.  If this is a write
access, we can end up with memory corruption.
Signed-off-by: NDon Mullis <don.mullis@gmail.com>
Tested-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The semctl syscall has several code paths that lead to the leakage of
uninitialized kernel stack memory (namely the IPC_INFO, SEM_INFO,
IPC_STAT, and SEM_STAT commands) during the use of the older, obsolete
version of the semid_ds struct.

The copy_semid_to_user() function declares a semid_ds struct on the stack
and copies it back to the user without initializing or zeroing the
"sem_base", "sem_pending", "sem_pending_last", and "undo" pointers,
allowing the leakage of 16 bytes of kernel stack memory.

The code is still reachable on 32-bit systems - when calling semctl()
newer glibc's automatically OR the IPC command with the IPC_64 flag, but
invoking the syscall directly allows users to use the older versions of
the struct.
Signed-off-by: NDan Rosenberg <dan.j.rosenberg@gmail.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Array of udimm sysfs attributes was not ended with NULL marker, leading to
dereference of random memory.

  EDAC DEBUG: edac_create_mci_instance_attributes: edac_create_mci_instance_attributes() file udimm0
  EDAC DEBUG: edac_create_mci_instance_attributes: edac_create_mci_instance_attributes() file udimm1
  EDAC DEBUG: edac_create_mci_instance_attributes: edac_create_mci_instance_attributes() file udimm2
  BUG: unable to handle kernel NULL pointer dereference at 00000000000001a4
  IP: [<ffffffff81330b36>] edac_create_mci_instance_attributes+0x148/0x1f1
  Pid: 1, comm: swapper Not tainted 2.6.36-rc3-nv+ #483 P6T SE/System Product Name
  RIP: 0010:[<ffffffff81330b36>]  [<ffffffff81330b36>] edac_create_mci_instance_attributes+0x148/0x1f1
  (...)
  Call Trace:
   [<ffffffff81330b86>] edac_create_mci_instance_attributes+0x198/0x1f1
   [<ffffffff81330c9a>] edac_create_sysfs_mci_device+0xbb/0x2b2
   [<ffffffff8132f533>] edac_mc_add_mc+0x46b/0x557
   [<ffffffff81428901>] i7core_probe+0xccf/0xec0
  RIP  [<ffffffff81330b36>] edac_create_mci_instance_attributes+0x148/0x1f1
  ---[ end trace 20de320855b81d78 ]---
  Kernel panic - not syncing: Attempted to kill init!
Signed-off-by: NMarcin Slusarz <marcin.slusarz@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: NDoug Thompson <dougthompson@xmission.com>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

sparc64 allmodconfig:

  drivers/serial/mrst_max3110.c: In function `serial_m3110_startup':
  drivers/serial/mrst_max3110.c:470: error: `IRQ_TYPE_EDGE_FALLING' undeclared (first use in this function)

Cc: Greg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix the warnings

  arch/m68k/mac/macboing.c: In function 'mac_mksound':
  arch/m68k/mac/macboing.c:189: warning: comparison of distinct pointer types lacks a cast
  arch/m68k/mac/macboing.c:211: warning: comparison of distinct pointer types lacks a cast
  arch/m68k/mac/macboing.c: In function 'mac_quadra_start_bell':
  arch/m68k/mac/macboing.c:241: warning: comparison of distinct pointer types lacks a cast
  arch/m68k/mac/macboing.c:263: warning: comparison of distinct pointer types lacks a cast
  arch/m68k/mac/macboing.c: In function 'mac_quadra_ring_bell':
  arch/m68k/mac/macboing.c:283: warning: comparison of distinct pointer types lacks a cast

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

alpha allmodconfig:

  drivers/serial/mfd.c:144: error: implicit declaration of function 'kzalloc'
  drivers/serial/mfd.c:144: warning: assignment makes pointer from integer without a cast

Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The kfifo_dma family of functions use sg_mark_end() on the last element in
their scatterlist.  This forces use of a fresh scatterlist for each DMA
operation, which makes recycling a single scatterlist impossible.

Change the behavior of the kfifo_dma functions to match the usage of the
dma_map_sg function.  This means that users must respect the returned
nents value.  The sample code is updated to reflect the change.

This bug is trivial to cause: call kfifo_dma_in_prepare() such that it
prepares a scatterlist with a single entry comprising the whole fifo.
This is the case when you map the entirety of a newly created empty fifo.
This causes the setup_sgl() function to mark the first scatterlist entry
as the end of the chain, no matter what comes after it.

Afterwards, add and remove some data from the fifo such that another call
to kfifo_dma_in_prepare() will create two scatterlist entries.  It returns
nents=2.  However, due to the previous sg_mark_end() call, sg_is_last()
will now return true for the first scatterlist element.  This causes the
sample code to print a single scatterlist element when it should print
two.

By removing the call to sg_mark_end(), we make the API as similar as
possible to the DMA mapping API.  All users are required to respect the
returned nents.
Signed-off-by: NIra W. Snyder <iws@ovro.caltech.edu>
Cc: Stefani Seibold <stefani@seibold.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

cifs_reconnect_tcon is called from smb_init. After a successful
reconnect, cifs_reconnect_tcon will call reset_cifs_unix_caps. That
function will, in turn call CIFSSMBQFSUnixInfo and CIFSSMBSetFSUnixInfo.
Those functions also call smb_init.

It's possible for the session and tcon reconnect to succeed, and then
for another cifs_reconnect to occur before CIFSSMBQFSUnixInfo or
CIFSSMBSetFSUnixInfo to be called. That'll cause those functions to call
smb_init and cifs_reconnect_tcon again, ad infinitum...

Break the infinite recursion by having those functions use a new
smb_init variant that doesn't attempt to perform a reconnect.
Reported-and-Tested-by: NMichal Suchanek <hramrach@centrum.cz>
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NSteve French <sfrench@us.ibm.com>

If the soon-to-be scanout buffer is partly covering the intended
VRAM region, move and pin will fail. In that case, just move it out
to system before attempting to move it in again.
Signed-off-by: NThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

The removed code causes oopses with newer drms on master drop.
Signed-off-by: NThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

This is to avoid accessing uninitialized data during
drm_irq_uninstall and vblank ioctls. At the same time, enable error check from
drm_kms_init which previously appeared to ignore all errors.
Signed-off-by: NThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

We add an option not to enable fbdev, this option is off (0) by default.
Not enabling fbdev at load time makes it possible to co-operate with
vga16fb and vga text mode when VT switching.

However, if 3D resources are active when VT switching, we're currently
not able to switch over to vga, due to device limitations.
This fixes a bug where we previously lost 3D state during VT switch.
Signed-off-by: NThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drm/vmwgfx: Fix breakage introduced by commit "drm: block userspace under allocating buffer and having drivers overwrite it (v2)"

The mentioned commit breaks the vmwgfx ioctl argument sanity check.
Signed-off-by: NThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

In order to be fully threadsafe we need to check that the drm_gem_object
refcount is still 0 after acquiring the mutex in order to call the free
function. Otherwise, we may encounter scenarios like:

Thread A:                                        Thread B:
drm_gem_close
unreference_unlocked
kref_put                                         mutex_lock
...                                              i915_gem_evict
...                                              kref_get -> BUG
...                                              i915_gem_unbind
...                                              kref_put
...                                              i915_gem_object_free
...                                              mutex_unlock
mutex_lock
i915_gem_object_free -> BUG
i915_gem_object_unbind
kfree
mutex_unlock

Note that no driver is currently using the free_unlocked vfunc and it is
scheduled for removal, hasten that process.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=30454Reported-and-Tested-by: NMagnus Kessler <Magnus.Kessler@gmx.net>
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
Signed-off-by: NDave Airlie <airlied@redhat.com>

Avoid TLB flush IPIs for the cores in deeper c-states by voluntary leave_mm()
before entering into that state. CPUs tend to flush TLB in those c-states
anyways.

acpi_idle does this with C3-type states, but it was not caried over
when intel_idle was introduced.  intel_idle can apply it
to C-states in addition to those that ACPI might export as C3...
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>

There were lots of places being inconsistent since handle count
looked like a kref but it really wasn't.

Fix this my just making handle count an atomic on the object,
and have it increase the normal object kref.

Now i915/radeon/nouveau drivers can drop the normal reference on
userspace object creation, and have the handle hold it.

This patch fixes a memory leak or corruption on unload, because
the driver had no way of knowing if a handle had been actually
added for this object, and the fbcon object needed to know this
to clean itself up properly.
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDave Airlie <airlied@redhat.com>

S3C2440 style I2C controller uses PCLK to calculate the SDA line delay.
The driver wrongly assumed that this delay is calculated from the
frequency that the controller is operating on. This patch fixes this
issue.
Signed-off-by: NMyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

create_irq() returns -1 if the interrupt allocation failed, but the
code checks for irq == 0.

Use create_irq_nr() instead.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Venkatesh Pallipadi <venki@google.com>
LKML-Reference: <alpine.LFD.2.00.1009282310360.2416@localhost6.localdomain6>
Cc: stable@kernel.org
Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>

free_irq_cfg() is not freeing the cpumask_vars in irq_cfg. Fixing this
triggers a use after free caused by the fact that copying struct
irq_cfg is done with memcpy, which copies the pointer not the cpumask.

Fix both places.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
LKML-Reference: <alpine.LFD.2.00.1009282052570.2416@localhost6.localdomain6>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: stable@kernel.org
Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>

Commit c52c2ddc ("alpha: switch osf_sigprocmask() to use of
sigprocmask()") had several problems.  The more obvious compile issues
got fixed in commit 0f44fbd2 ("alpha: fix compile problem in
arch/alpha/kernel/signal.c"), but it also caused a regression.

Since _BLOCKABLE is already the set of signals that can be blocked, the
code should do "newmask & _BLOCKABLE" rather than inverting _BLOCKABLE
before masking.
Reported-by: NMichael Cree <mcree@orcon.net.nz>
Patch-by: NAl Viro <viro@zeniv.linux.org.uk>
Patch-by: NIvan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
  ocfs2: Don't walk off the end of fast symlinks.

The i810 and i830 device drivers may replace their file operations
on an open file descriptor. My previous patch to move the BKL
out of the common DRM code into these drivers only caught the
default file operations, not the ones that actually end up being
used.

Found while trying to come up with a way to kill the BKL for
good in these drivers.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDave Airlie <airlied@redhat.com>

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
  dmaengine: fix interrupt clearing for mv_xor
  missing inline keyword for static function in linux/dmaengine.h
  dma/shdma: move dereference below the NULL check

ocfs2 fast symlinks are NUL terminated strings stored inline in the
inode data area.  However, disk corruption or a local attacker could, in
theory, remove that NUL.  Because we're using strlen() (my fault,
introduced in a731d1 when removing vfs_follow_link()), we could walk off
the end of that string.
Signed-off-by: NJoel Becker <joel.becker@oracle.com>
Cc: stable@kernel.org

* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  xfs: force background CIL push under sustained load

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
  mfd: Fix max8925 irq control bit incorrect setting
  mfd: Ignore non-GPIO IRQs when setting wm831x IRQ types