firefly-linux-kernel-4.4.55.git
13 years agobio: take care not overflow page count when mapping/copying user data
Jens Axboe [Wed, 10 Nov 2010 13:36:25 +0000 (14:36 +0100)]
bio: take care not overflow page count when mapping/copying user data

commit cb4644cac4a2797afc847e6c92736664d4b0ea34 upstream.

If the iovec is being set up in a way that causes uaddr + PAGE_SIZE
to overflow, we could end up attempting to map a huge number of
pages. Check for this invalid input type.

Reported-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agomm/vfs: revalidate page->mapping in do_generic_file_read()
Dave Hansen [Thu, 11 Nov 2010 22:05:15 +0000 (14:05 -0800)]
mm/vfs: revalidate page->mapping in do_generic_file_read()

commit 8d056cb965b8fb7c53c564abf28b1962d1061cd3 upstream.

70 hours into some stress tests of a 2.6.32-based enterprise kernel, we
ran into a NULL dereference in here:

int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc,
                                        unsigned long from)
{
----> struct inode *inode = page->mapping->host;

It looks like page->mapping was the culprit.  (xmon trace is below).
After closer examination, I realized that do_generic_file_read() does a
find_get_page(), and eventually locks the page before calling
block_is_partially_uptodate().  However, it doesn't revalidate the
page->mapping after the page is locked.  So, there's a small window
between the find_get_page() and ->is_partially_uptodate() where the page
could get truncated and page->mapping cleared.

We _have_ a reference, so it can't get reclaimed, but it certainly
can be truncated.

I think the correct thing is to check page->mapping after the
trylock_page(), and jump out if it got truncated.  This patch has been
running in the test environment for a month or so now, and we have not
seen this bug pop up again.

xmon info:

  1f:mon> e
  cpu 0x1f: Vector: 300 (Data Access) at [c0000002ae36f770]
      pc: c0000000001e7a6c: .block_is_partially_uptodate+0xc/0x100
      lr: c000000000142944: .generic_file_aio_read+0x1e4/0x770
      sp: c0000002ae36f9f0
     msr: 8000000000009032
     dar: 0
   dsisr: 40000000
    current = 0xc000000378f99e30
    paca    = 0xc000000000f66300
      pid   = 21946, comm = bash
  1f:mon> r
  R00 = 0025c0500000006d   R16 = 0000000000000000
  R01 = c0000002ae36f9f0   R17 = c000000362cd3af0
  R02 = c000000000e8cd80   R18 = ffffffffffffffff
  R03 = c0000000031d0f88   R19 = 0000000000000001
  R04 = c0000002ae36fa68   R20 = c0000003bb97b8a0
  R05 = 0000000000000000   R21 = c0000002ae36fa68
  R06 = 0000000000000000   R22 = 0000000000000000
  R07 = 0000000000000001   R23 = c0000002ae36fbb0
  R08 = 0000000000000002   R24 = 0000000000000000
  R09 = 0000000000000000   R25 = c000000362cd3a80
  R10 = 0000000000000000   R26 = 0000000000000002
  R11 = c0000000001e7b60   R27 = 0000000000000000
  R12 = 0000000042000484   R28 = 0000000000000001
  R13 = c000000000f66300   R29 = c0000003bb97b9b8
  R14 = 0000000000000001   R30 = c000000000e28a08
  R15 = 000000000000ffff   R31 = c0000000031d0f88
  pc  = c0000000001e7a6c .block_is_partially_uptodate+0xc/0x100
  lr  = c000000000142944 .generic_file_aio_read+0x1e4/0x770
  msr = 8000000000009032   cr  = 22000488
  ctr = c0000000001e7a60   xer = 0000000020000000   trap =  300
  dar = 0000000000000000   dsisr = 40000000
  1f:mon> t
  [link register   ] c000000000142944 .generic_file_aio_read+0x1e4/0x770
  [c0000002ae36f9f0c000000000142a14 .generic_file_aio_read+0x2b4/0x770 (unreliable)
  [c0000002ae36fb40c0000000001b03e4 .do_sync_read+0xd4/0x160
  [c0000002ae36fce0c0000000001b153c .vfs_read+0xec/0x1f0
  [c0000002ae36fd80c0000000001b1768 .SyS_read+0x58/0xb0
  [c0000002ae36fe30c00000000000852c syscall_exit+0x0/0x40
  --- Exception: c00 (System Call) at 00000080a840bc54
  SP (fffca15df30) is in userspace
  1f:mon> di c0000000001e7a6c
  c0000000001e7a6c  e9290000      ld      r9,0(r9)
  c0000000001e7a70  418200c0      beq     c0000000001e7b30        # .block_is_partially_uptodate+0xd0/0x100
  c0000000001e7a74  e9440008      ld      r10,8(r4)
  c0000000001e7a78  78a80020      clrldi  r8,r5,32
  c0000000001e7a7c  3c000001      lis     r0,1
  c0000000001e7a80  812900a8      lwz     r9,168(r9)
  c0000000001e7a84  39600001      li      r11,1
  c0000000001e7a88  7c080050      subf    r0,r8,r0
  c0000000001e7a8c  7f805040      cmplw   cr7,r0,r10
  c0000000001e7a90  7d6b4830      slw     r11,r11,r9
  c0000000001e7a94  796b0020      clrldi  r11,r11,32
  c0000000001e7a98  419d00a8      bgt     cr7,c0000000001e7b40    # .block_is_partially_uptodate+0xe0/0x100
  c0000000001e7a9c  7fa55840      cmpld   cr7,r5,r11
  c0000000001e7aa0  7d004214      add     r8,r0,r8
  c0000000001e7aa4  79080020      clrldi  r8,r8,32
  c0000000001e7aa8  419c0078      blt     cr7,c0000000001e7b20    # .block_is_partially_uptodate+0xc0/0x100

Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: <arunabal@in.ibm.com>
Cc: <sbest@us.ibm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agolatencytop: fix per task accumulator
Ken Chen [Thu, 11 Nov 2010 22:05:16 +0000 (14:05 -0800)]
latencytop: fix per task accumulator

commit 38715258aa2e8cd94bd4aafadc544e5104efd551 upstream.

Per task latencytop accumulator prematurely terminates due to erroneous
placement of latency_record_count.  It should be incremented whenever a
new record is allocated instead of increment on every latencytop event.

Also fix search iterator to only search known record events instead of
blindly searching all pre-allocated space.

Signed-off-by: Ken Chen <kenchen@google.com>
Reviewed-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agonetfilter: nf_conntrack: allow nf_ct_alloc_hashtable() to get highmem pages
Eric Dumazet [Thu, 28 Oct 2010 10:34:21 +0000 (12:34 +0200)]
netfilter: nf_conntrack: allow nf_ct_alloc_hashtable() to get highmem pages

commit 6b1686a71e3158d3c5f125260effce171cc7852b upstream.

commit ea781f197d6a8 (use SLAB_DESTROY_BY_RCU and get rid of call_rcu())
did a mistake in __vmalloc() call in nf_ct_alloc_hashtable().

I forgot to add __GFP_HIGHMEM, so pages were taken from LOWMEM only.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoALSA: hda: Use "alienware" model quirk for another SSID
Daniel T Chen [Thu, 2 Dec 2010 00:16:07 +0000 (19:16 -0500)]
ALSA: hda: Use "alienware" model quirk for another SSID

commit 0defe09ca70daccdc83abd9c3c24cd89ae6a1141 upstream.

BugLink: https://launchpad.net/bugs/683695
The original reporter states that headphone jacks do not appear to
work.  Upon inspecting his codec dump, and upon further testing, it is
confirmed that the "alienware" model quirk is correct.

Reported-and-tested-by: Cody Thierauf
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoALSA: HDA: Add an extra DAC for Realtek ALC887-VD
David Henningsson [Wed, 24 Nov 2010 13:17:47 +0000 (14:17 +0100)]
ALSA: HDA: Add an extra DAC for Realtek ALC887-VD

commit cc1c452e509aefc28f7ad2deed75bc69d4f915f7 upstream.

The patch enables ALC887-VD to use the DAC at nid 0x26,
which makes it possible to use this DAC for e g Headphone
volume.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoALSA: ac97: Apply quirk for Dell Latitude D610 binding Master and Headphone controls
Daniel T Chen [Mon, 1 Nov 2010 05:14:51 +0000 (01:14 -0400)]
ALSA: ac97: Apply quirk for Dell Latitude D610 binding Master and Headphone controls

commit 0613a59456980161d0cd468bae6c63d772743102 upstream.

BugLink: https://launchpad.net/bugs/669279
The original reporter states: "The Master mixer does not change the
volume from the headphone output (which is affected by the headphone
mixer). Instead it only seems to control the on-board speaker volume.
This confuses PulseAudio greatly as the Master channel is merged into
the volume mix."

Fix this symptom by applying the hp_only quirk for the reporter's SSID.
The fix is applicable to all stable kernels.

Reported-and-tested-by: Ben Gamari <bgamari@gmail.com>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agofirewire: ohci: fix race in AR split packet handling
Clemens Ladisch [Mon, 25 Oct 2010 09:42:20 +0000 (11:42 +0200)]
firewire: ohci: fix race in AR split packet handling

commit a1f805e5e73a8fe166b71c6592d3837df0cd5e2e upstream.

When handling an AR buffer that has been completely filled, we assumed
that its descriptor will not be read by the controller and can be
overwritten.  However, when the last received packet happens to end at
the end of the buffer, the controller might not yet have moved on to the
next buffer and might read the branch address later.  If we overwrite
and free the page before that, the DMA context will either go dead
because of an invalid Z value, or go off into some random memory.

To fix this, ensure that the descriptor does not get overwritten by
using only the actual buffer instead of the entire page for reassembling
the split packet.  Furthermore, to avoid freeing the page too early,
move on to the next buffer only when some data in it guarantees that the
controller has moved on.

This should eliminate the remaining firewire-net problems.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Tested-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agofirewire: ohci: fix buffer overflow in AR split packet handling
Clemens Ladisch [Mon, 25 Oct 2010 09:41:53 +0000 (11:41 +0200)]
firewire: ohci: fix buffer overflow in AR split packet handling

commit 85f7ffd5d2b320f73912b15fe8cef34bae297daf upstream.

When the controller had to split a received asynchronous packet into two
buffers, the driver tries to reassemble it by copying both parts into
the first page.  However, if size + rest > PAGE_SIZE, i.e., if the yet
unhandled packets before the split packet, the split packet itself, and
any received packets after the split packet are together larger than one
page, then the memory after the first page would get overwritten.

To fix this, do not try to copy the data of all unhandled packets at
once, but copy the possibly needed data every time when handling
a packet.

This gets rid of most of the infamous crashes and data corruptions when
using firewire-net.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Tested-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agofirewire: core: fix an information leak
Stefan Richter [Fri, 19 Feb 2010 20:00:02 +0000 (21:00 +0100)]
firewire: core: fix an information leak

commit 137d9ebfdbaa45c01f9f0f6d5121ae6f1eb942bd upstream.

If a device exposes a sparsely populated configuration ROM,
firewire-core's sysfs interface and character device file interface
showed random data in the gaps between config ROM blocks.  Fix this by
zero-initialization of the config ROM reader's scratch buffer.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: maximilian attems <max@stro.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agofirewire: cdev: fix information leak
Stefan Richter [Wed, 7 Apr 2010 06:30:50 +0000 (08:30 +0200)]
firewire: cdev: fix information leak

commit 9cac00b8f0079d5d3d54ec4dae453d58dec30e7c upstream.

A userspace client got to see uninitialized stack-allocated memory if it
specified an _IOC_READ type of ioctl and an argument size larger than
expected by firewire-core's ioctl handlers (but not larger than the
core's union ioctl_arg).

Fix this by clearing the requested buffer size to zero, but only at _IOR
ioctls.  This way, there is almost no runtime penalty to legitimate
ioctls.  The only legitimate _IOR is FW_CDEV_IOC_GET_CYCLE_TIMER with 12
or 16 bytes to memset.

[Another way to fix this would be strict checking of argument size (and
possibly direction) vs. command number.  However, we then need a lookup
table, and we need to allow for slight size deviations in case of 32bit
userland on 64bit kernel.]

Reported-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
[ Backported to 2.6.32 firewire core -maks ]
Signed-off-by: maximilian attems <max@stro.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoKVM: VMX: Fix host userspace gsbase corruption
Ben Hutchings [Mon, 29 Nov 2010 15:00:15 +0000 (13:00 -0200)]
KVM: VMX: Fix host userspace gsbase corruption

commit c8770e7ba63bb5dd8fe5f9d251275a8fa717fb78 upstream.

We now use load_gs_index() to load gs safely; unfortunately this also
changes MSR_KERNEL_GS_BASE, which we managed separately.  This resulted
in confusion and breakage running 32-bit host userspace on a 64-bit kernel.

Fix by
- saving guest MSR_KERNEL_GS_BASE before we we reload the host's gs
- doing the host save/load unconditionally, instead of only when in guest
  long mode

Things can be cleaned up further, but this is the minmal fix for now.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
[bwh: Backport to 2.6.32]
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoKVM: x86: fix information leak to userland
Vasiliy Kulikov [Mon, 29 Nov 2010 15:00:14 +0000 (13:00 -0200)]
KVM: x86: fix information leak to userland

commit 97e69aa62f8b5d338d6cff49be09e37cc1262838 upstream.

Structures kvm_vcpu_events, kvm_debugregs, kvm_pit_state2 and
kvm_clock_data are copied to userland with some padding and reserved
fields unitialized.  It leads to leaking of contents of kernel stack
memory.  We have to initialize them to zero.

In patch v1 Jan Kiszka suggested to fill reserved fields with zeros
instead of memset'ting the whole struct.  It makes sense as these
fields are explicitly marked as padding.  No more fields need zeroing.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoKVM: VMX: fix vmx null pointer dereference on debug register access
Gleb Natapov [Wed, 10 Nov 2010 10:08:12 +0000 (12:08 +0200)]
KVM: VMX: fix vmx null pointer dereference on debug register access

There is a bug in KVM that can be used to crash a host on Intel
machines. If emulator is tricked into emulating mov to/from DR instruction
it causes NULL pointer dereference on VMX since kvm_x86_ops->(set|get)_dr
are not initialized. Recently this is not exploitable from guest
userspace, but malicious guest kernel can trigger it easily.

CVE-2010-0435

On upstream bug was fixed differently around 2.6.34.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoTTY: ldisc, fix open flag handling
Jiri Slaby [Wed, 24 Nov 2010 23:27:54 +0000 (00:27 +0100)]
TTY: ldisc, fix open flag handling

commit 7f90cfc505d613f4faf096e0d84ffe99208057d9 upstream.

When a concrete ldisc open fails in tty_ldisc_open, we forget to clear
TTY_LDISC_OPEN. This causes a false warning on the next ldisc open:
WARNING: at drivers/char/tty_ldisc.c:445 tty_ldisc_open+0x26/0x38()
Hardware name: System Product Name
Modules linked in: ...
Pid: 5251, comm: a.out Tainted: G        W  2.6.32-5-686 #1
Call Trace:
 [<c1030321>] ? warn_slowpath_common+0x5e/0x8a
 [<c1030357>] ? warn_slowpath_null+0xa/0xc
 [<c119311c>] ? tty_ldisc_open+0x26/0x38
 [<c11936c5>] ? tty_set_ldisc+0x218/0x304
...

So clear the bit when failing...

Introduced in c65c9bc3efa (tty: rewrite the ldisc locking) back in
2.6.31-rc1.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Reported-by: Sergey Lapin <slapin@ossfans.org>
Tested-by: Sergey Lapin <slapin@ossfans.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agotty_ldisc: Fix BUG() on hangup
Philippe Rétornaz [Wed, 27 Oct 2010 15:13:21 +0000 (17:13 +0200)]
tty_ldisc: Fix BUG() on hangup

commit 1c95ba1e1de7edffc0c4e275e147f1a9eb1f81ae upstream.

A kernel BUG when bluetooth rfcomm connection drop while the associated
serial port is open is sometime triggered.

It seems that the line discipline can disappear between the
tty_ldisc_put and tty_ldisc_get. This patch fall back to the N_TTY line
discipline if the previous discipline is not available anymore.

Signed-off-by: Philippe Retornaz <philippe.retornaz@epfl.ch>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoTTY: restore tty_ldisc_wait_idle
Jiri Slaby [Sun, 31 Oct 2010 22:17:51 +0000 (23:17 +0100)]
TTY: restore tty_ldisc_wait_idle

commit 100eeae2c5ce23b4db93ff320ee330ef1d740151 upstream.

It was removed in 65b770468e98 (tty-ldisc: turn ldisc user count into
a proper refcount), but we need to wait for last user to quit the
ldisc before we close it in tty_set_ldisc.

Otherwise weird things start to happen. There might be processes
waiting in tty_read->n_tty_read on tty->read_wait for input to appear
and at that moment, a change of ldisc is fatal. n_tty_close is called,
it frees read_buf and the waiting process is still in the middle of
reading and goes nuts after it is woken.

Previously we prevented close to happen when others are in ldisc ops
by tty_ldisc_wait_idle in tty_set_ldisc. But the commit above removed
that. So revoke the change and test whether there is 1 user (=we), and
allow the close then.

We can do that without ldisc/tty locks, because nobody else can open
the device due to TTY_LDISC_CHANGING bit set, so we in fact wait for
everybody to leave.

I don't understand why tty_ldisc_lock would be needed either when the
counter is an atomic variable, so this is a lockless
tty_ldisc_wait_idle.

On the other hand, if we fail to wait (timeout or signal), we have to
reenable the halted ldiscs, so we take ldisc lock and reuse the setup
path at the end of tty_set_ldisc.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Sebastian Andrzej Siewior <bigeasy@breakpoint.cc>
LKML-Reference: <20101031104136.GA511@Chamillionaire.breakpoint.cc>
LKML-Reference: <1287669539-22644-1-git-send-email-jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agotty: prevent DOS in the flush_to_ldisc
Jiri Olsa [Mon, 8 Nov 2010 18:01:47 +0000 (19:01 +0100)]
tty: prevent DOS in the flush_to_ldisc

commit e045fec48970df84647a47930fcf7a22ff7229c0 upstream.

There's a small window inside the flush_to_ldisc function,
where the tty is unlocked and calling ldisc's receive_buf
function. If in this window new buffer is added to the tty,
the processing might never leave the flush_to_ldisc function.

This scenario will hog the cpu, causing other tty processing
starving, and making it impossible to interface the computer
via tty.

I was able to exploit this via pty interface by sending only
control characters to the master input, causing the flush_to_ldisc
to be scheduled, but never actually generate any output.

To reproduce, please run multiple instances of following code.

- SNIP
#define _XOPEN_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main(int argc, char **argv)
{
        int i, slave, master = getpt();
        char buf[8192];

        sprintf(buf, "%s", ptsname(master));
        grantpt(master);
        unlockpt(master);

        slave = open(buf, O_RDWR);
        if (slave < 0) {
                perror("open slave failed");
                return 1;
        }

        for(i = 0; i < sizeof(buf); i++)
                buf[i] = rand() % 32;

        while(1) {
                write(master, buf, sizeof(buf));
        }

        return 0;
}
- SNIP

The attached patch (based on -next tree) fixes this by checking on the
tty buffer tail. Once it's reached, the current work is rescheduled
and another could run.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agox86: AMD Northbridge: Verify NB's node is online
Prarit Bhargava [Thu, 12 Nov 2009 18:09:31 +0000 (13:09 -0500)]
x86: AMD Northbridge: Verify NB's node is online

commit 303fc0870f8fbfabe260c5c32b18e53458d597ea upstream.

Fix panic seen on some IBM and HP systems on 2.6.32-rc6:

 BUG: unable to handle kernel NULL pointer dereference at (null)
 IP: [<ffffffff8120bf3f>] find_next_bit+0x77/0x9c
  [...]
  [<ffffffff8120bbde>] cpumask_next_and+0x2e/0x3b
  [<ffffffff81225c62>] pci_device_probe+0x8e/0xf5
  [<ffffffff812b9be6>] ? driver_sysfs_add+0x47/0x6c
  [<ffffffff812b9da5>] driver_probe_device+0xd9/0x1f9
  [<ffffffff812b9f1d>] __driver_attach+0x58/0x7c
  [<ffffffff812b9ec5>] ? __driver_attach+0x0/0x7c
  [<ffffffff812b9298>] bus_for_each_dev+0x54/0x89
  [<ffffffff812b9b4f>] driver_attach+0x19/0x1b
  [<ffffffff812b97ae>] bus_add_driver+0xd3/0x23d
  [<ffffffff812ba1e7>] driver_register+0x98/0x109
  [<ffffffff81225ed0>] __pci_register_driver+0x63/0xd3
  [<ffffffff81072776>] ? up_read+0x26/0x2a
  [<ffffffffa0081000>] ? k8temp_init+0x0/0x20 [k8temp]
  [<ffffffffa008101e>] k8temp_init+0x1e/0x20 [k8temp]
  [<ffffffff8100a073>] do_one_initcall+0x6d/0x185
  [<ffffffff8108d765>] sys_init_module+0xd3/0x236
  [<ffffffff81011ac2>] system_call_fastpath+0x16/0x1b

I put in a printk and commented out the set_dev_node()
call when and got this output:

 quirk_amd_nb_node: current numa_node = 0x0, would set to val & 7 = 0x0
 quirk_amd_nb_node: current numa_node = 0x0, would set to val & 7 = 0x1
 quirk_amd_nb_node: current numa_node = 0x0, would set to val & 7 = 0x2
 quirk_amd_nb_node: current numa_node = 0x0, would set to val & 7 = 0x3

I.e. the issue appears to be that the HW has set val to a valid
value, however, the system is only configured for a single
node -- 0, the others are offline.

Check to see if the node is actually online before setting
the numa node for an AMD northbridge in quirk_amd_nb_node().

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: bhavna.sarathy@amd.com
Cc: jbarnes@virtuousgeek.org
Cc: andreas.herrmann3@amd.com
LKML-Reference: <20091112180933.12532.98685.sendpatchset@prarit.bos.redhat.com>
[ v2: clean up the code and add comments ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: maximilian attems <max@stro.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agomd: fix return value of rdev_size_change()
Justin Maggard [Wed, 24 Nov 2010 05:36:17 +0000 (16:36 +1100)]
md: fix return value of rdev_size_change()

commit c26a44ed1e552aaa1d4ceb71842002d235fe98d7 upstream.

When trying to grow an array by enlarging component devices,
rdev_size_store() expects the return value of rdev_size_change() to be
in sectors, but the actual value is returned in KBs.

This functionality was broken by commit
     dd8ac336c13fd8afdb082ebacb1cddd5cf727889
so this patch is suitable for any kernel since 2.6.30.

Signed-off-by: Justin Maggard <jmaggard10@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agomd/raid1: really fix recovery looping when single good device fails.
NeilBrown [Wed, 24 Nov 2010 05:39:46 +0000 (16:39 +1100)]
md/raid1: really fix recovery looping when single good device fails.

commit 8f9e0ee38f75d4740daa9e42c8af628d33d19a02 upstream.

Commit 4044ba58dd15cb01797c4fd034f39ef4a75f7cc3 supposedly fixed a
problem where if a raid1 with just one good device gets a read-error
during recovery, the recovery would abort and immediately restart in
an infinite loop.

However it depended on raid1_remove_disk removing the spare device
from the array.  But that does not happen in this case.  So add a test
so that in the 'recovery_disabled' case, the device will be removed.

This suitable for any kernel since 2.6.29 which is when
recovery_disabled was introduced.

Reported-by: Sebastian Färber <faerber@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoeCryptfs: Clear LOOKUP_OPEN flag when creating lower file
Tyler Hicks [Thu, 23 Sep 2010 07:35:04 +0000 (02:35 -0500)]
eCryptfs: Clear LOOKUP_OPEN flag when creating lower file

commit 2e21b3f124eceb6ab5a07c8a061adce14ac94e14 upstream.

eCryptfs was passing the LOOKUP_OPEN flag through to the lower file
system, even though ecryptfs_create() doesn't support the flag. A valid
filp for the lower filesystem could be returned in the nameidata if the
lower file system's create() function supported LOOKUP_OPEN, possibly
resulting in unencrypted writes to the lower file.

However, this is only a potential problem in filesystems (FUSE, NFS,
CIFS, CEPH, 9p) that eCryptfs isn't known to support today.

https://bugs.launchpad.net/ecryptfs/+bug/641703

Reported-by: Kevin Buhr
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoviafb: use proper register for colour when doing fill ops
Florian Tobias Schandinat [Wed, 22 Sep 2010 02:33:52 +0000 (02:33 +0000)]
viafb: use proper register for colour when doing fill ops

commit efd4f6398dc92b5bf392670df862f42a19f34cf2 upstream.

The colour was written to a wrong register for fillrect operations.
This sometimes caused empty console space (for example after 'clear')
to have a different colour than desired. Fix this by writing to the
correct register.
Many thanks to Daniel Drake and Jon Nettleton for pointing out this
issue and pointing me in the right direction for the fix.

Fixes http://dev.laptop.org/ticket/9323

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Daniel Drake <dsd@laptop.org>
Cc: Jon Nettleton <jon.nettleton@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agodrivers/char/vt_ioctl.c: fix VT_OPENQRY error value
Graham Gower [Wed, 27 Oct 2010 22:33:00 +0000 (15:33 -0700)]
drivers/char/vt_ioctl.c: fix VT_OPENQRY error value

commit 1e0ad2881d50becaeea70ec696a80afeadf944d2 upstream.

When all VT's are in use, VT_OPENQRY casts -1 to unsigned char before
returning it to userspace as an int.  VT255 is not the next available
console.

Signed-off-by: Graham Gower <graham.gower@gmail.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agonet: NETIF_F_HW_CSUM does not imply FCoE CRC offload
Ben Hutchings [Fri, 22 Oct 2010 04:38:26 +0000 (04:38 +0000)]
net: NETIF_F_HW_CSUM does not imply FCoE CRC offload

commit 66c68bcc489fadd4f5e8839e966e3a366e50d1d5 upstream.

NETIF_F_HW_CSUM indicates the ability to update an TCP/IP-style 16-bit
checksum with the checksum of an arbitrary part of the packet data,
whereas the FCoE CRC is something entirely different.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agosys_semctl: fix kernel stack leakage
Dan Rosenberg [Thu, 30 Sep 2010 22:15:31 +0000 (15:15 -0700)]
sys_semctl: fix kernel stack leakage

commit 982f7c2b2e6a28f8f266e075d92e19c0dd4c6e56 upstream.

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: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoipc: shm: fix information leak to userland
Vasiliy Kulikov [Sat, 30 Oct 2010 14:22:49 +0000 (18:22 +0400)]
ipc: shm: fix information leak to userland

commit 3af54c9bd9e6f14f896aac1bb0e8405ae0bc7a44 upstream.

The shmid_ds structure is copied to userland with shm_unused{,2,3}
fields unitialized.  It leads to leaking of contents of kernel stack
memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoipc: initialize structure memory to zero for compat functions
Dan Rosenberg [Wed, 27 Oct 2010 22:34:17 +0000 (15:34 -0700)]
ipc: initialize structure memory to zero for compat functions

commit 03145beb455cf5c20a761e8451e30b8a74ba58d9 upstream.

This takes care of leaking uninitialized kernel stack memory to
userspace from non-zeroed fields in structs in compat ipc functions.

Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoxen: don't bother to stop other cpus on shutdown/reboot
Jeremy Fitzhardinge [Mon, 29 Nov 2010 22:16:53 +0000 (14:16 -0800)]
xen: don't bother to stop other cpus on shutdown/reboot

commit 31e323cca9d5c8afd372976c35a5d46192f540d1 upstream.

Xen will shoot all the VCPUs when we do a shutdown hypercall, so there's
no need to do it manually.

In any case it will fail because all the IPI irqs have been pulled
down by this point, so the cross-CPU calls will simply hang forever.

Until change 76fac077db6b34e2c6383a7b4f3f4f7b7d06d8ce the function calls
were not synchronously waited for, so this wasn't apparent.  However after
that change the calls became synchronous leading to a hang on shutdown
on multi-VCPU guests.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Alok Kataria <akataria@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoxen: ensure that all event channels start off bound to VCPU 0
Ian Campbell [Fri, 8 Oct 2010 15:59:12 +0000 (16:59 +0100)]
xen: ensure that all event channels start off bound to VCPU 0

commit b0097adeec27e30223c989561ab0f7aa60d1fe93 upstream.

All event channels startbound to VCPU 0 so ensure that cpu_evtchn_mask
is initialised to reflect this. Otherwise there is a race after registering an
event channel but before the affinity is explicitly set where the event channel
can be delivered. If this happens then the event channel remains pending in the
L1 (evtchn_pending) array but is cleared in L2 (evtchn_pending_sel), this means
the event channel cannot be reraised until another event channel happens to
trigger the same L2 entry on that VCPU.

sizeof(cpu_evtchn_mask(0))==sizeof(unsigned long*) which is not correct, and
causes only the first 32 or 64 event channels (depending on architecture) to be
initially bound to VCPU0. Use sizeof(struct cpu_evtchn_s) instead.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agosgi-xpc: XPC fails to discover partitions with all nasids above 128
Robin@sgi.com [Wed, 24 Nov 2010 20:56:59 +0000 (12:56 -0800)]
sgi-xpc: XPC fails to discover partitions with all nasids above 128

commit c22c7aeff69796f46ae0fcec141538e28f50b24e upstream.

UV hardware defines 256 memory protection regions versus the baseline 64
with increasing size for the SN2 ia64.  This was overlooked when XPC was
modified to accomodate both UV and SN2.

Without this patch, a user could reconfigure their existing system and
suddenly disable cross-partition communications with no indication of what
has gone wrong.  It also prevents larger configurations from using
cross-partition communication.

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agossb: b43-pci-bridge: Add new vendor for BCM4318
Daniel Klaffenbach [Sat, 20 Nov 2010 03:25:21 +0000 (21:25 -0600)]
ssb: b43-pci-bridge: Add new vendor for BCM4318

commit 1d8638d4038eb8709edc80e37a0bbb77253d86e9 upstream.

Add new vendor for Broadcom 4318.

Signed-off-by: Daniel Klaffenbach <danielklaffenbach@gmail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoata_generic: implement ATA_GEN_* flags and force enable DMA on MBP 7,1
Tejun Heo [Tue, 22 Jun 2010 10:27:26 +0000 (12:27 +0200)]
ata_generic: implement ATA_GEN_* flags and force enable DMA on MBP 7,1

commit 1529c69adce1e95f7ae72f0441590c226bbac7fc upstream.

IDE mode of MCP89 on MBP 7,1 doesn't set DMA enable bits in the BMDMA
status register.  Make the following changes to work around the problem.

* Instead of using hard coded 1 in id->driver_data as class code
  match, use ATA_GEN_CLASS_MATCH and carry the matched id in
  host->private_data.

* Instead of matching PCI_VENDOR_ID_CENATEK, use ATA_GEN_FORCE_DMA
  flag in id instead.

* Add ATA_GEN_FORCE_DMA to the id entry of MBP 7,1.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Peer Chen <pchen@nvidia.com>
Reported-by: Anders Østhus <grapz666@gmail.com>
Reported-by: Andreas Graf <andreas_graf@csgraf.de>
Reported-by: Benoit Gschwind <gschwind@gnu-log.net>
Reported-by: Damien Cassou <damien.cassou@gmail.com>
Reported-by: tixetsal@juno.com
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoahci,ata_generic: let ata_generic handle new MBP w/ MCP89
Tejun Heo [Thu, 17 Jun 2010 09:42:22 +0000 (11:42 +0200)]
ahci,ata_generic: let ata_generic handle new MBP w/ MCP89

commit c6353b4520788e34098bbf61c73fb9618ca7fdd6 upstream.

For yet unknown reason, MCP89 on MBP 7,1 doesn't work w/ ahci under
linux but the controller doesn't require explicit mode setting and
works fine with ata_generic.  Make ahci ignore the controller on MBP
7,1 and let ata_generic take it for now.

Reported in bko#15923.

  https://bugzilla.kernel.org/show_bug.cgi?id=15923

NVIDIA is investigating why ahci mode doesn't work.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Peer Chen <pchen@nvidia.com>
Reported-by: Anders Østhus <grapz666@gmail.com>
Reported-by: Andreas Graf <andreas_graf@csgraf.de>
Reported-by: Benoit Gschwind <gschwind@gnu-log.net>
Reported-by: Damien Cassou <damien.cassou@gmail.com>
Reported-by: tixetsal@juno.com
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agomm: fix is_mem_section_removable() page_order BUG_ON check
KAMEZAWA Hiroyuki [Tue, 26 Oct 2010 21:22:08 +0000 (14:22 -0700)]
mm: fix is_mem_section_removable() page_order BUG_ON check

commit 572438f9b52236bd8938b1647cc15e027d27ef55 upstream.

page_order() is called by memory hotplug's user interface to check the
section is removable or not.  (is_mem_section_removable())

It calls page_order() withoug holding zone->lock.
So, even if the caller does

if (PageBuddy(page))
ret = page_order(page) ...
The caller may hit BUG_ON().

For fixing this, there are 2 choices.
  1. add zone->lock.
  2. remove BUG_ON().

is_mem_section_removable() is used for some "advice" and doesn't need to
be 100% accurate.  This is_removable() can be called via user program..
We don't want to take this important lock for long by user's request.  So,
this patch removes BUG_ON().

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agomm: fix return value of scan_lru_pages in memory unplug
KAMEZAWA Hiroyuki [Tue, 26 Oct 2010 21:21:10 +0000 (14:21 -0700)]
mm: fix return value of scan_lru_pages in memory unplug

commit f8f72ad5396987e05a42cf7eff826fb2a15ff148 upstream.

scan_lru_pages returns pfn. So, it's type should be "unsigned long"
not "int".

Note: I guess this has been work until now because memory hotplug tester's
      machine has not very big memory....
      physical address < 32bit << PAGE_SHIFT.

Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agohwmon: (lm85) Fix ADT7468 frequency table
Jean Delvare [Thu, 28 Oct 2010 18:31:50 +0000 (20:31 +0200)]
hwmon: (lm85) Fix ADT7468 frequency table

commit fa7a5797e57d2ed71f9a6fb44f0ae42c2d7b74b7 upstream.

The ADT7468 uses the same frequency table as the ADT7463.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Darrick J. Wong <djwong@us.ibm.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agonuma: fix slab_node(MPOL_BIND)
Eric Dumazet [Wed, 27 Oct 2010 17:33:43 +0000 (19:33 +0200)]
numa: fix slab_node(MPOL_BIND)

commit 800416f799e0723635ac2d720ad4449917a1481c upstream.

When a node contains only HighMem memory, slab_node(MPOL_BIND)
dereferences a NULL pointer.

[ This code seems to go back all the way to commit 19770b32609b: "mm:
  filter based on a nodemask as well as a gfp_mask".  Which was back in
  April 2008, and it got merged into 2.6.26.  - Linus ]

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoum: fix global timer issue when using CONFIG_NO_HZ
Richard Weinberger [Tue, 26 Oct 2010 21:21:13 +0000 (14:21 -0700)]
um: fix global timer issue when using CONFIG_NO_HZ

commit 482db6df1746c4fa7d64a2441d4cb2610249c679 upstream.

This fixes a issue which was introduced by fe2cc53e ("uml: track and make
up lost ticks").

timeval_to_ns() returns long long and not int.  Due to that UML's timer
did not work properlt and caused timer freezes.

Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoum: remove PAGE_SIZE alignment in linker script causing kernel segfault.
Richard Weinberger [Tue, 26 Oct 2010 21:21:16 +0000 (14:21 -0700)]
um: remove PAGE_SIZE alignment in linker script causing kernel segfault.

commit 6915e04f8847bea16d0890f559694ad8eedd026c upstream.

The linker script cleanup that I did in commit 5d150a97f93 ("um: Clean up
linker script using standard macros.") (2.6.32) accidentally introduced an
ALIGN(PAGE_SIZE) when converting to use INIT_TEXT_SECTION; Richard
Weinberger reported that this causes the kernel to segfault with
CONFIG_STATIC_LINK=y.

I'm not certain why this extra alignment is a problem, but it seems likely
it is because previously

__init_begin = _stext = _text = _sinittext

and with the extra ALIGN(PAGE_SIZE), _sinittext becomes different from the
rest.  So there is likely a bug here where something is assuming that
_sinittext is the same as one of those other symbols.  But reverting the
accidental change fixes the regression, so it seems worth committing that
now.

Signed-off-by: Tim Abbott <tabbott@ksplice.com>
Reported-by: Richard Weinberger <richard@nod.at>
Cc: Jeff Dike <jdike@addtoit.com>
Tested by: Antoine Martin <antoine@nagafix.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agopercpu: fix list_head init bug in __percpu_counter_init()
Masanori ITOH [Tue, 26 Oct 2010 21:21:20 +0000 (14:21 -0700)]
percpu: fix list_head init bug in __percpu_counter_init()

commit 8474b591faf3bb0a1e08a60d21d6baac498f15e4 upstream.

WARNING: at lib/list_debug.c:26 __list_add+0x3f/0x81()
Hardware name: Express5800/B120a [N8400-085]
list_add corruption. next->prev should be prev (ffffffff81a7ea00), but was dead000000200200. (next=ffff88080b872d58).
Modules linked in: aoe ipt_MASQUERADE iptable_nat nf_nat autofs4 sunrpc bridge 8021q garp stp llc ipv6 cpufreq_ondemand acpi_cpufreq freq_table dm_round_robin dm_multipath kvm_intel kvm uinput lpfc scsi_transport_fc igb ioatdma scsi_tgt i2c_i801 i2c_core dca iTCO_wdt iTCO_vendor_support pcspkr shpchp megaraid_sas [last unloaded: aoe]
Pid: 54, comm: events/3 Tainted: G        W  2.6.34-vanilla1 #1
Call Trace:
[<ffffffff8104bd77>] warn_slowpath_common+0x7c/0x94
[<ffffffff8104bde6>] warn_slowpath_fmt+0x41/0x43
[<ffffffff8120fd2e>] __list_add+0x3f/0x81
[<ffffffff81212a12>] __percpu_counter_init+0x59/0x6b
[<ffffffff810d8499>] bdi_init+0x118/0x17e
[<ffffffff811f2c50>] blk_alloc_queue_node+0x79/0x143
[<ffffffff811f2d2b>] blk_alloc_queue+0x11/0x13
[<ffffffffa02a931d>] aoeblk_gdalloc+0x8e/0x1c9 [aoe]
[<ffffffffa02aa655>] aoecmd_sleepwork+0x25/0xa8 [aoe]
[<ffffffff8106186c>] worker_thread+0x1a9/0x237
[<ffffffffa02aa630>] ? aoecmd_sleepwork+0x0/0xa8 [aoe]
[<ffffffff81065827>] ? autoremove_wake_function+0x0/0x39
[<ffffffff810616c3>] ? worker_thread+0x0/0x237
[<ffffffff810653ad>] kthread+0x7f/0x87
[<ffffffff8100aa24>] kernel_thread_helper+0x4/0x10
[<ffffffff8106532e>] ? kthread+0x0/0x87
[<ffffffff8100aa20>] ? kernel_thread_helper+0x0/0x10

It's because there is no initialization code for a list_head contained in
the struct backing_dev_info under CONFIG_HOTPLUG_CPU, and the bug comes up
when block device drivers calling blk_alloc_queue() are used.  In case of
me, I got them by using aoe.

Signed-off-by: Masanori Itoh <itoumsn@nttdata.co.jp>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoolpc_battery: Fix endian neutral breakage for s16 values
Richard A. Smith [Sat, 25 Sep 2010 18:19:26 +0000 (19:19 +0100)]
olpc_battery: Fix endian neutral breakage for s16 values

commit 7cfbb29466633e6ecdc14f76a693c8478c2b22af upstream.

When the driver was updated to be endian neutral (8e9c7716c)
the signed part of the s16 values was lost.  This is because be16_to_cpu()
returns an unsigned value.  This patch casts the values back to a s16
number prior to the the implicit cast up to an int.

Signed-off-by: Richard A. Smith <richard@laptop.org>
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agohpet: unmap unused I/O space
Jiri Slaby [Tue, 26 Oct 2010 21:22:11 +0000 (14:22 -0700)]
hpet: unmap unused I/O space

commit a56d5318716d120e040294bb258901ba89fb9c90 upstream.

When the initialization code in hpet finds a memory resource and does not
find an IRQ, it does not unmap the memory resource previously mapped.

There are buggy BIOSes which report resources exactly like this and what
is worse the memory region bases point to normal RAM.  This normally would
not matter since the space is not touched.  But when PAT is turned on,
ioremap causes the page to be uncached and sets this bit in page->flags.

Then when the page is about to be used by the allocator, it is reported
as:

BUG: Bad page state in process md5sum  pfn:3ed00
page:ffffea0000dbd800 count:0 mapcount:0 mapping:(null) index:0x0
page flags: 0x20000001000000(uncached)
Pid: 7956, comm: md5sum Not tainted 2.6.34-12-desktop #1
Call Trace:
 [<ffffffff810df851>] bad_page+0xb1/0x100
 [<ffffffff810dfa45>] prep_new_page+0x1a5/0x1c0
 [<ffffffff810dfe01>] get_page_from_freelist+0x3a1/0x640
 [<ffffffff810e01af>] __alloc_pages_nodemask+0x10f/0x6b0
...

In this particular case:

1) HPET returns 3ed00000 as memory region base, but it is not in
reserved ranges reported by the BIOS (excerpt):
 BIOS-e820: 0000000000100000 - 00000000af6cf000 (usable)
 BIOS-e820: 00000000af6cf000 - 00000000afdcf000 (reserved)

2) there is no IRQ resource reported by HPET method. On the other
hand, the Intel HPET specs (1.0a) says (3.2.5.1):
_CRS (
  // Report 1K of memory consumed by this Timer Block
  memory range consumed
  // Optional: only used if BIOS allocates Interrupts [1]
  IRQs consumed
)

[1] For case where Timer Block is configured to consume IRQ0/IRQ8 AND
Legacy 8254/Legacy RTC hardware still exists, the device objects
associated with 8254 & RTC devices should not report IRQ0/IRQ8 as
"consumed resources".

So in theory we should check whether if it is the case and use those
interrupts instead.

Anyway the address reported by the BIOS here is bogus, so non-presence
of IRQ doesn't mean the "optional" part in point 2).

Since I got no reply previously, fix this by simply unmapping the space
when IRQ is not found and memory region was mapped previously.  It would
be probably more safe to walk the resources again and unmap appropriately
depending on type.  But as we now use only ioremap for both 2 memory
resource types, it is not necessarily needed right now.

Addresses https://bugzilla.novell.com/show_bug.cgi?id=629908

Reported-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agohpet: fix unwanted interrupt due to stale irq status bit
Clemens Ladisch [Tue, 26 Oct 2010 21:22:13 +0000 (14:22 -0700)]
hpet: fix unwanted interrupt due to stale irq status bit

commit 96e9694df446d1154ec2f4fdba8908588b9cba38 upstream.

Jaswinder Singh Rajput wrote:
> By executing Documentation/timers/hpet_example.c
>
> for polling, I requested for 3 iterations but it seems iteration work
> for only 2 as first expired time is always very small.
>
> # ./hpet_example poll /dev/hpet 10 3
> -hpet: executing poll
> hpet_poll: info.hi_flags 0x0
> hpet_poll: expired time = 0x13
> hpet_poll: revents = 0x1
> hpet_poll: data 0x1
> hpet_poll: expired time = 0x1868c
> hpet_poll: revents = 0x1
> hpet_poll: data 0x1
> hpet_poll: expired time = 0x18645
> hpet_poll: revents = 0x1
> hpet_poll: data 0x1

Clearing the HPET interrupt enable bit disables interrupt generation
but does not disable the timer, so the interrupt status bit will still
be set when the timer elapses.  If another interrupt arrives before
the timer has been correctly programmed (due to some other device on
the same interrupt line, or CONFIG_DEBUG_SHIRQ), this results in an
extra unwanted interrupt event because the status bit is likely to be
set from comparator matches that happened before the device was opened.

Therefore, we have to ensure that the interrupt status bit is and
stays cleared until we actually program the timer.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Reported-by: Jaswinder Singh Rajput <jaswinderlinux@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Bob Picco <bpicco@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoStaging: line6: fix up some sysfs attribute permissions
Greg Kroah-Hartman [Tue, 16 Nov 2010 19:23:33 +0000 (11:23 -0800)]
Staging: line6: fix up some sysfs attribute permissions

commit 2018845b6a169f75341f8e68ad1089cb6697cf24 and
2018845b6a169f75341f8e68ad1089cb6697cf24 upstream merged together as it
had to be backported by hand.

They should not be writable by any user

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Markus Grabner <grabner@icg.tugraz.at>
Cc: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoStaging: asus_oled: fix up my fixup for some sysfs attribute permissions
Greg Kroah-Hartman [Thu, 18 Nov 2010 19:21:04 +0000 (11:21 -0800)]
Staging: asus_oled: fix up my fixup for some sysfs attribute permissions

commit 515b4987ccd097cdf5416530b05fdf9e01afe95a upstream.

They should be writable by root, not readable.
Doh, stupid me with the wrong flags.

Reported-by: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Jakub Schmidtke <sjakub@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoStaging: asus_oled: fix up some sysfs attribute permissions
Greg Kroah-Hartman [Tue, 16 Nov 2010 19:17:01 +0000 (11:17 -0800)]
Staging: asus_oled: fix up some sysfs attribute permissions

commit 590b0b9754bd8928926bae7194b6da7ead9bda3b upstream.

They should not be writable by any user

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jakub Schmidtke <sjakub@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agonet: clear heap allocation for ETHTOOL_GRXCLSRLALL
Kees Cook [Thu, 7 Oct 2010 10:03:48 +0000 (10:03 +0000)]
net: clear heap allocation for ETHTOOL_GRXCLSRLALL

commit ae6df5f96a51818d6376da5307d773baeece4014 upstream.

Calling ETHTOOL_GRXCLSRLALL with a large rule_cnt will allocate kernel
heap without clearing it. For the one driver (niu) that implements it,
it will leave the unused portion of heap unchanged and copy the full
contents back to userspace.

Signed-off-by: Kees Cook <kees.cook@canonical.com>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agomicroblaze: Fix build with make 3.82
Thomas Backlund [Thu, 21 Oct 2010 10:19:10 +0000 (13:19 +0300)]
microblaze: Fix build with make 3.82

commit b843e4ec01991a386a9e0e9030703524446e03da upstream.

When running make headers_install_all on x86_64 and make 3.82 I hit this:

arch/microblaze/Makefile:80: *** mixed implicit and normal rules.  Stop.
make: *** [headers_install_all] Error 2

So split the rules to satisfy make 3.82.

Signed-off-by: Thomas Backlund <tmb@mandriva.org>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoi2c-pca-platform: Change device name of request_irq
Nobuhiro Iwamatsu [Sun, 24 Oct 2010 16:16:57 +0000 (18:16 +0200)]
i2c-pca-platform: Change device name of request_irq

commit 323584436db0cb05286425d4dfd9516fce88487f upstream.

i2c->adap.name shouldn't be used in request_irq.
Instead the driver name "i2c-pca-platform" should be used.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoirda: Fix heap memory corruption in iriap.c
Samuel Ortiz [Tue, 5 Oct 2010 23:03:12 +0000 (01:03 +0200)]
irda: Fix heap memory corruption in iriap.c

commit 37f9fc452d138dfc4da2ee1ce5ae85094efc3606 upstream.

While parsing the GetValuebyClass command frame, we could potentially write
passed the skb->data pointer.

Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoirda: Fix parameter extraction stack overflow
Samuel Ortiz [Sun, 10 Oct 2010 23:17:56 +0000 (01:17 +0200)]
irda: Fix parameter extraction stack overflow

commit efc463eb508798da4243625b08c7396462cabf9f upstream.

Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agojme: Fix PHY power-off error
Guo-Fu Tseng [Mon, 18 Oct 2010 14:10:40 +0000 (14:10 +0000)]
jme: Fix PHY power-off error

commit c8a8684d5cfb0f110a962c93586630c0bf91ebc1 upstream.

Adding phy_on in opposition to phy_off.

Signed-off-by: Guo-Fu Tseng <cooldavid@cooldavid.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoblock: check for proper length of iov entries in blk_rq_map_user_iov()
Jens Axboe [Fri, 29 Oct 2010 14:10:18 +0000 (08:10 -0600)]
block: check for proper length of iov entries in blk_rq_map_user_iov()

commit 9284bcf4e335e5f18a8bc7b26461c33ab60d0689 upstream.

Ensure that we pass down properly validated iov segments before
calling into the mapping or copy functions.

Reported-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoblock: take care not to overflow when calculating total iov length
Jens Axboe [Fri, 29 Oct 2010 17:31:42 +0000 (11:31 -0600)]
block: take care not to overflow when calculating total iov length

commit 9f864c80913467312c7b8690e41fb5ebd1b50e92 upstream.

Reported-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoblock: limit vec count in bio_kmalloc() and bio_alloc_map_data()
Jens Axboe [Fri, 29 Oct 2010 17:46:56 +0000 (11:46 -0600)]
block: limit vec count in bio_kmalloc() and bio_alloc_map_data()

commit f3f63c1c28bc861a931fac283b5bc3585efb8967 upstream.

Reported-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
13 years agoblock: Ensure physical block size is unsigned int
Martin K. Petersen [Wed, 13 Oct 2010 19:18:03 +0000 (21:18 +0200)]
block: Ensure physical block size is unsigned int

commit 892b6f90db81cccb723d5d92f4fddc2d68b206e1 upstream.

Physical block size was declared unsigned int to accomodate the maximum
size reported by READ CAPACITY(16).  Make sure we use the right type in
the related functions.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoLinux 2.6.32.26
Greg Kroah-Hartman [Mon, 22 Nov 2010 18:48:20 +0000 (10:48 -0800)]
Linux 2.6.32.26

14 years agosgi-xp: incoming XPC channel messages can come in after the channel's partition struc...
Robin Holt [Tue, 26 Oct 2010 21:21:15 +0000 (14:21 -0700)]
sgi-xp: incoming XPC channel messages can come in after the channel's partition structures have been torn down

commit 09358972bff5ce99de496bbba97c85d417b3c054 upstream.

Under some workloads, some channel messages have been observed being
delayed on the sending side past the point where the receiving side has
been able to tear down its partition structures.

This condition is already detected in xpc_handle_activate_IRQ_uv(), but
that information is not given to xpc_handle_activate_mq_msg_uv().  As a
result, xpc_handle_activate_mq_msg_uv() assumes the structures still exist
and references them, causing a NULL-pointer deref.

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoFix regressions in scsi_internal_device_block
Mike Christie [Wed, 6 Oct 2010 08:10:59 +0000 (03:10 -0500)]
Fix regressions in scsi_internal_device_block

commit 986fe6c7f50974e871b8ab5a800f5310ea25b361 upstream.

Deleting a SCSI device on a blocked fc_remote_port (before
fast_io_fail_tmo fires) results in a hanging thread:

  STACK:
  0 schedule+1108 [0x5cac48]
  1 schedule_timeout+528 [0x5cb7fc]
  2 wait_for_common+266 [0x5ca6be]
  3 blk_execute_rq+160 [0x354054]
  4 scsi_execute+324 [0x3b7ef4]
  5 scsi_execute_req+162 [0x3b80ca]
  6 sd_sync_cache+138 [0x3cf662]
  7 sd_shutdown+138 [0x3cf91a]
  8 sd_remove+112 [0x3cfe4c]
  9 __device_release_driver+124 [0x3a08b8]
10 device_release_driver+60 [0x3a0a5c]
11 bus_remove_device+266 [0x39fa76]
12 device_del+340 [0x39d818]
13 __scsi_remove_device+204 [0x3bcc48]
14 scsi_remove_device+66 [0x3bcc8e]
15 sysfs_schedule_callback_work+50 [0x260d66]
16 worker_thread+622 [0x162326]
17 kthread+160 [0x1680b0]
18 kernel_thread_starter+6 [0x10aaea]

During the delete, the SCSI device is in moved to SDEV_CANCEL.  When
the FC transport class later calls scsi_target_unblock, this has no
effect, since scsi_internal_device_unblock ignores SCSI devics in this
state.

It looks like all these are regressions caused by:
5c10e63c943b4c67561ddc6bf61e01d4141f881f
[SCSI] limit state transitions in scsi_internal_device_unblock

Fix by rejecting offline and cancel in the state transition.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
[jejb: Original patch by Christof Schmitt, modified by Mike Christie]
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoFix race when removing SCSI devices
Christof Schmitt [Wed, 6 Oct 2010 11:19:44 +0000 (13:19 +0200)]
Fix race when removing SCSI devices

commit 546ae796bfac6399e30da4b5af2cf7a6d0f8a4ec upstream.

Removing SCSI devices through
echo 1 > /sys/bus/scsi/devices/ ... /delete

while the FC transport class removes the SCSI target can lead to an
oops:

Unable to handle kernel pointer dereference at virtual kernel address 00000000b6815000
Oops: 0011 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in: sunrpc qeth_l3 binfmt_misc dm_multipath scsi_dh dm_mod ipv6 qeth ccwgroup [last unloaded: scsi_wait_scan]
CPU: 1 Not tainted 2.6.35.5-45.x.20100924-s390xdefault #1
Process fc_wq_0 (pid: 861, task: 00000000b7331240, ksp: 00000000b735bac0)
Krnl PSW : 0704200180000000 00000000003ff6e4 (__scsi_remove_device+0x24/0xd0)
           R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:2 PM:0 EA:3
Krnl GPRS: 0000000000000001 0000000000000000 00000000b6815000 00000000bc24a8c0
           00000000003ff7c8 000000000056dbb8 0000000000000002 0000000000835d80
           ffffffff00000000 0000000000001000 00000000b6815000 00000000bc24a7f0
           00000000b68151a0 00000000b6815000 00000000b735bc20 00000000b735bbf8
Krnl Code: 00000000003ff6d6a7840001            brc 8,3ff6d8
           00000000003ff6daa7fbffd8            aghi %r15,-40
           00000000003ff6dee3e0f0980024        stg %r14,152(%r15)
          >00000000003ff6e4e31021200004        lg %r1,288(%r2)
           00000000003ff6eaa71f0000            cghi    %r1,0
           00000000003ff6eea7a40011            brc 10,3ff710
           00000000003ff6f2a7390003            lghi    %r3,3
           00000000003ff6f6c0e5ffffc8b1        brasl %r14,3f8858
Call Trace:
([<0000000000001000>] 0x1000)
 [<00000000003ff7d2>] scsi_remove_device+0x42/0x54
 [<00000000003ff8ba>] __scsi_remove_target+0xca/0xfc
 [<00000000003ff99a>] __remove_child+0x3a/0x48
 [<00000000003e3246>] device_for_each_child+0x72/0xbc
 [<00000000003ff93a>] scsi_remove_target+0x4e/0x74
 [<0000000000406586>] fc_rport_final_delete+0xb2/0x23c
 [<000000000015d080>] worker_thread+0x200/0x344
 [<000000000016330c>] kthread+0xa0/0xa8
 [<0000000000106c1a>] kernel_thread_starter+0x6/0xc
 [<0000000000106c14>] kernel_thread_starter+0x0/0xc
INFO: lockdep is turned off.
Last Breaking-Event-Address:
 [<00000000003ff7cc>] scsi_remove_device+0x3c/0x54

The function __scsi_remove_target iterates through the SCSI devices on
the host, but it drops the host_lock before calling
scsi_remove_device. When the SCSI device is deleted from another
thread, the pointer to the SCSI device in scsi_remove_device can
become invalid. Fix this by getting a reference to the SCSI device
before dropping the host_lock to keep the SCSI device alive for the
call to scsi_remove_device.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agogdth: integer overflow in ioctl
Dan Carpenter [Fri, 8 Oct 2010 07:03:07 +0000 (09:03 +0200)]
gdth: integer overflow in ioctl

commit f63ae56e4e97fb12053590e41a4fa59e7daa74a4 upstream.

gdth_ioctl_alloc() takes the size variable as an int.
copy_from_user() takes the size variable as an unsigned long.
gen.data_len and gen.sense_len are unsigned longs.
On x86_64 longs are 64 bit and ints are 32 bit.

We could pass in a very large number and the allocation would truncate
the size to 32 bits and allocate a small buffer.  Then when we do the
copy_from_user(), it would result in a memory corruption.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agolibsas: fix NCQ mixing with non-NCQ
David Milburn [Fri, 3 Sep 2010 22:13:03 +0000 (17:13 -0500)]
libsas: fix NCQ mixing with non-NCQ

commit f0ad30d3d2dc924decc0e10b1ff6dc32525a5d99 upstream.

Some cards (like mvsas) have issue troubles if non-NCQ commands are
mixed with NCQ ones.  Fix this by using the libata default NCQ check
routine which waits until all NCQ commands are complete before issuing
a non-NCQ one.  The impact to cards (like aic94xx) which don't need
this logic should be minimal

Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agosd name space exhaustion causes system hang
Michael Reed [Mon, 20 Sep 2010 16:20:22 +0000 (11:20 -0500)]
sd name space exhaustion causes system hang

commit 1a03ae0f556a931aa3747b70e44b78308f5b0590 upstream.

Following a site power outage which re-enabled all the ports on my FC
switches, my system subsequently booted with far too many luns!  I had
let it run hoping it would make multi-user.  It didn't.  :(  It hung solid
after exhausting the last sd device, sdzzz, and attempting to create sdaaaa
and beyond.  I was unable to get a dump.

Discovered using a 2.6.32.13 based system.

correct this by detecting when the last index is utilized and failing
the sd probe of the device.  Patch applies to scsi-misc-2.6.

Signed-off-by: Michael Reed <mdr@sgi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: accept some invalid ep0-maxpacket values
Alan Stern [Thu, 14 Oct 2010 19:25:21 +0000 (15:25 -0400)]
USB: accept some invalid ep0-maxpacket values

commit 56626a72a47bf3e50875d960d6b5f17b9bee0ab2 upstream.

A few devices (such as the RCA VR5220 voice recorder) are so
non-compliant with the USB spec that they have invalid maxpacket sizes
for endpoint 0.  Nevertheless, as long as we can safely use them, we
may as well do so.

This patch (as1432) softens our acceptance criterion by allowing
high-speed devices to have ep0-maxpacket sizes other than 64.  A
warning is printed in the system log when this happens, and the
existing error message is clarified.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: James <bjlockie@lockie.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: opticon: Fix long-standing bugs in opticon driver
Alon Ziv [Sun, 10 Oct 2010 06:32:18 +0000 (08:32 +0200)]
USB: opticon: Fix long-standing bugs in opticon driver

commit 97cd8dc4ca9a1a5efb2cc38758e01492e3b013e2 upstream.

The bulk-read callback had two bugs:
a) The bulk-in packet's leading two zeros were returned (and the two last
   bytes truncated)
b) The wrong URB was transmitted for the second (and later) read requests,
   causing further reads to return the entire packet (including leading
   zeros)

Signed-off-by: Alon Ziv <alon-git@nolaviz.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: disable endpoints after unbinding interfaces, not before
Alan Stern [Thu, 30 Sep 2010 19:16:23 +0000 (15:16 -0400)]
USB: disable endpoints after unbinding interfaces, not before

commit 80f0cf3947889014d3a3dc0ad60fb87cfda4b12a upstream.

This patch (as1430) fixes a bug in usbcore.  When a device
configuration change occurs or a device is removed, the endpoints for
the old config should be completely disabled.  However it turns out
they aren't; this is because usb_unbind_interface() calls
usb_enable_interface() or usb_set_interface() to put interfaces back
in altsetting 0, which re-enables the interfaces' endpoints.

As a result, when a device goes through a config change or is
unconfigured, the ep_in[] and ep_out[] arrays may be left holding old
pointers to usb_host_endpoint structures.  If the device is
deauthorized these structures get freed, and the stale pointers cause
errors when the the device is eventually unplugged.

The solution is to disable the endpoints after unbinding the
interfaces instead of before.  This isn't as large a change as it
sounds, since usb_unbind_interface() disables all the interface's
endpoints anyway before calling the driver's disconnect routine,
unless the driver claims to support "soft" unbind.

This fixes Bugzilla #19192.  Thanks to "Tom" Lei Ming for diagnosing
the underlying cause of the problem.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Carsten Sommer <carsten_sommer@ymail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: atmel_usba_udc: force vbus_pin at -EINVAL when gpio_request failled
Jean-Christophe PLAGNIOL-VILLARD [Mon, 20 Sep 2010 16:31:07 +0000 (18:31 +0200)]
USB: atmel_usba_udc: force vbus_pin at -EINVAL when gpio_request failled

commit 969affff54702785330de553b790372e261e93f9 upstream.

to ensure gpio_is_valid return false

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: cp210x: Add WAGO 750-923 Service Cable device ID
Anders Larsen [Wed, 6 Oct 2010 21:46:25 +0000 (23:46 +0200)]
USB: cp210x: Add WAGO 750-923 Service Cable device ID

commit 93ad03d60b5b18897030038234aa2ebae8234748 upstream.

The WAGO 750-923 USB Service Cable is used for configuration and firmware
updates of several industrial automation products from WAGO Kontakttechnik GmbH.

Bus 004 Device 002: ID 1be3:07a6
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x1be3
  idProduct          0x07a6
  bcdDevice            1.00
  iManufacturer           1 Silicon Labs
  iProduct                2 WAGO USB Service Cable
  iSerial                 3 1277796751
  . . .

Signed-off-by: Anders Larsen <al@alarsen.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: cp210x: Add Renesas RX-Stick device ID
DJ Delorie [Fri, 17 Sep 2010 15:09:06 +0000 (11:09 -0400)]
USB: cp210x: Add Renesas RX-Stick device ID

commit 2f1136d1d08a63dcdbcd462621373f30d8dfe590 upstream.

RX610 development board by Renesas

Bus 001 Device 024: ID 045b:0053 Hitachi, Ltd
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x045b Hitachi, Ltd
  idProduct          0x0053
  bcdDevice            1.00
  iManufacturer           1 Silicon Labs
  iProduct                2 RX-Stick
  iSerial                 3 0001
  . . .

http://am.renesas.com/rx610stick

Signed-off-by: DJ Delorie <dj@delorie.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: option: Add more ZTE modem USB id's
Mauro Carvalho Chehab [Sun, 12 Sep 2010 14:41:50 +0000 (11:41 -0300)]
USB: option: Add more ZTE modem USB id's

commit ecfa153ef616b901e86d9a051b329fcda7a6ce7b upstream.

There are lots of ZTE USB id's currently not covered by usb/serial. Adds them,
to allow those devices to work properly on Linux.

While here, put the USB ID's for 0x2002/0x2003 at the sorted order.

This patch is based on zte.c file found on MF645.

PS.: The ZTE driver is commenting the USB ID for 0x0053. It also adds, commented,
an USB ID for 0x0026.

Not sure why, but I think that 0053 is used by their devices in storage mode only.
So, I opted to keep the comment on this patch.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agousb: musb: blackfin: call gpio_free() on error path in musb_platform_init()
Sergei Shtylyov [Wed, 29 Sep 2010 06:54:31 +0000 (09:54 +0300)]
usb: musb: blackfin: call gpio_free() on error path in musb_platform_init()

commit 00be545e49d83485d49a598d3b7e090088934be8 upstream.

Blackfin's musb_platform_init() needs to call gpio_free() for error cleanup iff
otg_get_transceiver() call returns NULL.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: ftdi_sio: add device ids for ScienceScope
Greg Kroah-Hartman [Tue, 19 Oct 2010 16:05:43 +0000 (09:05 -0700)]
USB: ftdi_sio: add device ids for ScienceScope

commit 0f266abd70cd83571eca019f764b5f1992da7361 upstream.

This adds the requested device ids to the ftdi_sio driver.

Reported-by: Ewan Bingham <ewan@auc.co.uk>
Cc: Kuba Ober <kuba@mareimbrium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: ftdi_sio: new VID/PIDs for various Papouch devices
Daniel Suchy [Tue, 12 Oct 2010 13:44:24 +0000 (15:44 +0200)]
USB: ftdi_sio: new VID/PIDs for various Papouch devices

commit 59c6ccd9f9aecfa59c99ceba6d4d34b180547a05 upstream.

This patch for FTDI USB serial driver ads new VID/PIDs used on various
devices manufactured by Papouch (http://www.papouch.com). These devices
have their own VID/PID, although they're using standard FTDI chip. In
ftdi_sio.c, I also made small cleanup to have declarations for all
Papouch devices together.

Signed-off-by: Daniel Suchy <danny@danysek.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: add PID for FTDI based OpenDCC hardware
Rainer Keller [Tue, 28 Sep 2010 10:27:43 +0000 (12:27 +0200)]
USB: add PID for FTDI based OpenDCC hardware

commit 99c1e4f89d1033444ce4d0c064bd2826e81c3775 upstream.

The OpenDCC project is developing a new hardware. This patch adds its
PID to the list of known FTDI devices. The PID can be found at
http://www.opendcc.de/elektronik/usb/opendcc_usb.html

Signed-off-by: Rainer Keller <mail@rainerkeller.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoUSB: ftdi_sio: Add PID for accesio products
Rich Mattes [Tue, 14 Sep 2010 04:35:40 +0000 (00:35 -0400)]
USB: ftdi_sio: Add PID for accesio products

commit 3126d8236ca6f68eb8292c6af22c2e59afbeef24 upstream.

Adds support for Accesio USB to Serial adapters, which are built around
FTDI FT232 UARTs.  Tested with the Accesio USB-COM-4SM.

Signed-off-by: Rich Mattes <richmattes@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agodrivers/net/wireless/p54/eeprom.c: Return -ENOMEM on memory allocation failure
Julia Lawall [Fri, 15 Oct 2010 13:00:06 +0000 (15:00 +0200)]
drivers/net/wireless/p54/eeprom.c: Return -ENOMEM on memory allocation failure

commit 0d91f22b75347d9503b17a42b6c74d3f7750acd6 upstream.

In this code, 0 is returned on memory allocation failure, even though other
failures return -ENOMEM or other similar values.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression ret;
expression x,e1,e2,e3;
@@

ret = 0
... when != ret = e1
*x = \(kmalloc\|kcalloc\|kzalloc\)(...)
... when != ret = e2
if (x == NULL) { ... when != ret = e3
  return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agop54usb: add five more USBIDs
Christian Lamparter [Fri, 1 Oct 2010 20:01:24 +0000 (22:01 +0200)]
p54usb: add five more USBIDs

commit 1a92795dac419128eb511dce30a6aad672064b88 upstream.

Source:
http://www.wikidevi.com/wiki/Intersil/p54/usb/windows

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agop54usb: fix off-by-one on !CONFIG_PM
Christian Lamparter [Sun, 22 Aug 2010 20:41:33 +0000 (22:41 +0200)]
p54usb: fix off-by-one on !CONFIG_PM

commit 11791a6f7534906b4a01ffb54ba0b02ca39398ef upstream.

The ISL3887 chip needs a USB reset, whenever the
usb-frontend module "p54usb" is reloaded.

This patch fixes an off-by-one bug, if the user
is running a kernel without the CONFIG_PM option
set and for some reason (e.g.: compat-wireless)
wants to switch between different p54usb modules.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agopipe: fix failure to return error code on ->confirm()
Nicolas Kaiser [Thu, 21 Oct 2010 12:56:00 +0000 (14:56 +0200)]
pipe: fix failure to return error code on ->confirm()

commit e5953cbdff26f7cbae7eff30cd9b18c4e19b7594 upstream.

The arguments were transposed, we want to assign the error code to
'ret', which is being returned.

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoKVM: Fix fs/gs reload oops with invalid ldt
Avi Kivity [Thu, 28 Oct 2010 18:48:16 +0000 (16:48 -0200)]
KVM: Fix fs/gs reload oops with invalid ldt

commit 9581d442b9058d3699b4be568b6e5eae38a41493 upstream

kvm reloads the host's fs and gs blindly, however the underlying segment
descriptors may be invalid due to the user modifying the ldt after loading
them.

Fix by using the safe accessors (loadsegment() and load_gs_index()) instead
of home grown unsafe versions.

This is CVE-2010-3698.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoKVM: x86: Move TSC reset out of vmcb_init
Zachary Amsden [Thu, 28 Oct 2010 18:48:15 +0000 (16:48 -0200)]
KVM: x86: Move TSC reset out of vmcb_init

commit 47008cd887c1836bcadda123ba73e1863de7a6c4 upstream.

The VMCB is reset whenever we receive a startup IPI, so Linux is setting
TSC back to zero happens very late in the boot process and destabilizing
the TSC.  Instead, just set TSC to zero once at VCPU creation time.

Why the separate patch?  So git-bisect is your friend.

Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoKVM: x86: Fix SVM VMCB reset
Zachary Amsden [Thu, 28 Oct 2010 18:48:14 +0000 (16:48 -0200)]
KVM: x86: Fix SVM VMCB reset

commit 58877679fd393d3ef71aa383031ac7817561463d upstream.

On reset, VMCB TSC should be set to zero.  Instead, code was setting
tsc_offset to zero, which passes through the underlying TSC.

Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoKVM: SVM: Adjust tsc_offset only if tsc_unstable
Joerg Roedel [Thu, 28 Oct 2010 18:48:13 +0000 (16:48 -0200)]
KVM: SVM: Adjust tsc_offset only if tsc_unstable

commit 953899b659adce62cbe83d6a7527550ab8797c48 upstream.

The tsc_offset adjustment in svm_vcpu_load is executed
unconditionally even if Linux considers the host tsc as
stable. This causes a Linux guest detecting an unstable tsc
in any case.
This patch removes the tsc_offset adjustment if the host tsc
is stable. The guest will now get the benefit of a stable
tsc too.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoKVM: VMX: Fix host GDT.LIMIT corruption
Avi Kivity [Thu, 28 Oct 2010 18:48:12 +0000 (16:48 -0200)]
KVM: VMX: Fix host GDT.LIMIT corruption

commit 3444d7da1839b851eefedd372978d8a982316c36 upstream.

vmx does not restore GDT.LIMIT to the host value, instead it sets it to 64KB.
This means host userspace can learn a few bits of host memory.

Fix by reloading GDTR when we load other host state.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoKVM: MMU: fix conflict access permissions in direct sp
Xiao Guangrong [Thu, 28 Oct 2010 18:48:11 +0000 (16:48 -0200)]
KVM: MMU: fix conflict access permissions in direct sp

commit 5fd5387c89ec99ff6cb82d2477ffeb7211b781c2 upstream.

In no-direct mapping, we mark sp is 'direct' when we mapping the
guest's larger page, but its access is encoded form upper page-struct
entire not include the last mapping, it will cause access conflict.

For example, have this mapping:
        [W]
      / PDE1 -> |---|
  P[W]          |   | LPA
      \ PDE2 -> |---|
        [R]

P have two children, PDE1 and PDE2, both PDE1 and PDE2 mapping the
same lage page(LPA). The P's access is WR, PDE1's access is WR,
PDE2's access is RO(just consider read-write permissions here)

When guest access PDE1, we will create a direct sp for LPA, the sp's
access is from P, is W, then we will mark the ptes is W in this sp.

Then, guest access PDE2, we will find LPA's shadow page, is the same as
PDE's, and mark the ptes is RO.

So, if guest access PDE1, the incorrect #PF is occured.

Fixed by encode the last mapping access into direct shadow page

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoKVM: MMU: fix direct sps access corrupted
Xiao Guangrong [Thu, 28 Oct 2010 18:48:10 +0000 (16:48 -0200)]
KVM: MMU: fix direct sps access corrupted

commit 9e7b0e7fba45ca3c6357aeb7091ebc281f1de365 upstream.

If the mapping is writable but the dirty flag is not set, we will find
the read-only direct sp and setup the mapping, then if the write #PF
occur, we will mark this mapping writable in the read-only direct sp,
now, other real read-only mapping will happily write it without #PF.

It may hurt guest's COW

Fixed by re-install the mapping when write #PF occur.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agoKVM: SVM: Fix wrong intercept masks on 32 bit
Joerg Roedel [Thu, 28 Oct 2010 18:48:09 +0000 (16:48 -0200)]
KVM: SVM: Fix wrong intercept masks on 32 bit

commit 061e2fd16863009c8005b4b5fdfb75c7215c0b99 upstream.

This patch makes KVM on 32 bit SVM working again by
correcting the masks used for iret interception. With the
wrong masks the upper 32 bits of the intercepts are masked
out which leaves vmrun unintercepted. This is not legal on
svm and the vmrun fails.
Bug was introduced by commits 95ba827313 and 3cfc3092.

Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agox86, kdump: Change copy_oldmem_page() to use cached addressing
Cliff Wickman [Wed, 8 Sep 2010 15:14:27 +0000 (10:14 -0500)]
x86, kdump: Change copy_oldmem_page() to use cached addressing

commit 37a2f9f30a360fb03522d15c85c78265ccd80287 upstream.

The copy of /proc/vmcore to a user buffer proceeds much faster
if the kernel addresses memory as cached.

With this patch we have seen an increase in transfer rate from
less than 15MB/s to 80-460MB/s, depending on size of the
transfer. This makes a big difference in time needed to save a
system dump.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: kexec@lists.infradead.org
LKML-Reference: <E1OtMLz-0001yp-Ia@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agox86, intr-remap: Set redirection hint in the IRTE
Suresh Siddha [Fri, 27 Aug 2010 18:09:48 +0000 (11:09 -0700)]
x86, intr-remap: Set redirection hint in the IRTE

commit 75e3cfbed6f71a8f151dc6e413b6ce3c390030cb upstream.

Currently the redirection hint in the interrupt-remapping table entry
is set to 0, which means the remapped interrupt is directed to the
processors listed in the destination. So in logical flat mode
in the presence of intr-remapping, this results in a single
interrupt multi-casted to multiple cpu's as specified by the destination
bit mask. But what we really want is to send that interrupt to one of the cpus
based on the lowest priority delivery mode.

Set the redirection hint in the IRTE to '1' to indicate that we want
the remapped interrupt to be directed to only one of the processors
listed in the destination.

This fixes the issue of same interrupt getting delivered to multiple cpu's
in the logical flat mode in the presence of interrupt-remapping. While
there is no functional issue observed with this behavior, this will
impact performance of such configurations (<=8 cpu's using logical flat
mode in the presence of interrupt-remapping)

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <20100827181049.013051492@sbsiddha-MOBL3.sc.intel.com>
Cc: Weidong Han <weidong.han@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agox86, mtrr: Assume SYS_CFG[Tom2ForceMemTypeWB] exists on all future AMD CPUs
Andreas Herrmann [Thu, 30 Sep 2010 12:32:35 +0000 (14:32 +0200)]
x86, mtrr: Assume SYS_CFG[Tom2ForceMemTypeWB] exists on all future AMD CPUs

commit 3fdbf004c1706480a7c7fac3c9d836fa6df20d7d upstream.

Instead of adapting the CPU family check in amd_special_default_mtrr()
for each new CPU family assume that all new AMD CPUs support the
necessary bits in SYS_CFG MSR.

Tom2Enabled is architectural (defined in APM Vol.2).
Tom2ForceMemTypeWB is defined in all BKDGs starting with K8 NPT.
In pre K8-NPT BKDG this bit is reserved (read as zero).

W/o this adaption Linux would unnecessarily complain about bad MTRR
settings on every new AMD CPU family, e.g.

[    0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 4863MB of RAM.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20100930123235.GB20545@loge.amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agox86, olpc: Don't retry EC commands forever
Paul Fox [Fri, 1 Oct 2010 17:17:19 +0000 (18:17 +0100)]
x86, olpc: Don't retry EC commands forever

commit 286e5b97eb22baab9d9a41ca76c6b933a484252c upstream.

Avoids a potential infinite loop.

It was observed once, during an EC hacking/debugging
session - not in regular operation.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Cc: dilinger@queued.net
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agox86, kexec: Make sure to stop all CPUs before exiting the kernel
Alok Kataria [Mon, 11 Oct 2010 21:37:08 +0000 (14:37 -0700)]
x86, kexec: Make sure to stop all CPUs before exiting the kernel

commit 76fac077db6b34e2c6383a7b4f3f4f7b7d06d8ce upstream.

x86 smp_ops now has a new op, stop_other_cpus which takes a parameter
"wait" this allows the caller to specify if it wants to stop until all
the cpus have processed the stop IPI.  This is required specifically
for the kexec case where we should wait for all the cpus to be stopped
before starting the new kernel.  We now wait for the cpus to stop in
all cases except for panic/kdump where we expect things to be broken
and we are doing our best to make things work anyway.

This patch fixes a legitimate regression, which was introduced during
2.6.30, by commit id 4ef702c10b5df18ab04921fc252c26421d4d6c75.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
LKML-Reference: <1286833028.1372.20.camel@ank32.eng.vmware.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agox86, cpu: Fix renamed, not-yet-shipping AMD CPUID feature bit
Andre Przywara [Mon, 6 Sep 2010 13:14:17 +0000 (15:14 +0200)]
x86, cpu: Fix renamed, not-yet-shipping AMD CPUID feature bit

commit 7ef8aa72ab176e0288f363d1247079732c5d5792 upstream.

The AMD SSE5 feature set as-it has been replaced by some extensions
to the AVX instruction set. Thus the bit formerly advertised as SSE5
is re-used for one of these extensions (XOP).
Although this changes the /proc/cpuinfo output, it is not user visible, as
there are no CPUs (yet) having this feature.
To avoid confusion this should be added to the stable series, too.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>
LKML-Reference: <1283778860-26843-2-git-send-email-andre.przywara@amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agomm, x86: Saving vmcore with non-lazy freeing of vmas
Cliff Wickman [Thu, 16 Sep 2010 16:44:02 +0000 (11:44 -0500)]
mm, x86: Saving vmcore with non-lazy freeing of vmas

commit 3ee48b6af49cf534ca2f481ecc484b156a41451d upstream.

During the reading of /proc/vmcore the kernel is doing
ioremap()/iounmap() repeatedly. And the buildup of un-flushed
vm_area_struct's is causing a great deal of overhead. (rb_next()
is chewing up most of that time).

This solution is to provide function set_iounmap_nonlazy(). It
causes a subsequent call to iounmap() to immediately purge the
vma area (with try_purge_vmap_area_lazy()).

With this patch we have seen the time for writing a 250MB
compressed dump drop from 71 seconds to 44 seconds.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: kexec@lists.infradead.org
LKML-Reference: <E1OwHZ4-0005WK-Tw@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agofutex: Fix errors in nested key ref-counting
Darren Hart [Sun, 17 Oct 2010 15:35:04 +0000 (08:35 -0700)]
futex: Fix errors in nested key ref-counting

commit 7ada876a8703f23befbb20a7465a702ee39b1704 upstream.

futex_wait() is leaking key references due to futex_wait_setup()
acquiring an additional reference via the queue_lock() routine. The
nested key ref-counting has been masking bugs and complicating code
analysis. queue_lock() is only called with a previously ref-counted
key, so remove the additional ref-counting from the queue_(un)lock()
functions.

Also futex_wait_requeue_pi() drops one key reference too many in
unqueue_me_pi(). Remove the key reference handling from
unqueue_me_pi(). This was paired with a queue_lock() in
futex_lock_pi(), so the count remains unchanged.

Document remaining nested key ref-counting sites.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Reported-and-tested-by: Matthieu Fertré<matthieu.fertre@kerlabs.com>
Reported-by: Louis Rilling<louis.rilling@kerlabs.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <4CBB17A8.70401@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agobluetooth: Fix missing NULL check
Alan Cox [Fri, 22 Oct 2010 13:11:26 +0000 (14:11 +0100)]
bluetooth: Fix missing NULL check

commit c19483cc5e56ac5e22dd19cf25ba210ab1537773 upstream.

Fortunately this is only exploitable on very unusual hardware.

[Reported a while ago but nothing happened so just fixing it]

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agosched: Fix string comparison in /proc/sched_features
Mathieu Desnoyers [Mon, 13 Sep 2010 21:47:00 +0000 (17:47 -0400)]
sched: Fix string comparison in /proc/sched_features

commit 7740191cd909b75d75685fb08a5d1f54b8a9d28b upstream.

Fix incorrect handling of the following case:

 INTERACTIVE
 INTERACTIVE_SOMETHING_ELSE

The comparison only checks up to each element's length.

Changelog since v1:
 - Embellish using some Rostedtisms.
  [ mingo:                 ^^ == smaller and cleaner ]

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tony Lindgren <tony@atomide.com>
LKML-Reference: <20100913214700.GB16118@Krystal>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agopcmcia: synclink_cs: fix information leak to userland
Vasiliy Kulikov [Sun, 17 Oct 2010 14:41:24 +0000 (18:41 +0400)]
pcmcia: synclink_cs: fix information leak to userland

commit 5b917a1420d3d1a9c8da49fb0090692dc9aaee86 upstream.

Structure new_line is copied to userland with some padding fields unitialized.
It leads to leaking of stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
14 years agopowerpc/perf: Fix sampling enable for PPC970
Paul Mackerras [Thu, 9 Sep 2010 19:02:40 +0000 (19:02 +0000)]
powerpc/perf: Fix sampling enable for PPC970

commit 9f5f9ffe50e90ed73040d2100db8bfc341cee352 upstream.

The logic to distinguish marked instruction events from ordinary events
on PPC970 and derivatives was flawed.  The result is that instruction
sampling didn't get enabled in the PMU for some marked instruction
events, so they would never trigger.  This fixes it by adding the
appropriate break statements in the switch statement.

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>