platform/kernel/linux-exynos.git
8 years agopinctrl-bcm2835: Fix cut-and-paste error in "pull" parsing
Phil Elwell [Tue, 1 Mar 2016 01:30:08 +0000 (17:30 -0800)]
pinctrl-bcm2835: Fix cut-and-paste error in "pull" parsing

[ Upstream commit 2c7e3306d23864d49f686f22e56e180ff0fffb7f ]

The DT bindings for pinctrl-bcm2835 allow both the function and pull
to contain either one entry or one per pin. However, an error in the
DT parsing can cause failures if the number of pulls differs from the
number of functions.

Cc: stable@vger.kernel.org
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Reviewed-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoKVM: i8254: change PIT discard tick policy
Radim Krčmář [Wed, 2 Mar 2016 21:56:38 +0000 (22:56 +0100)]
KVM: i8254: change PIT discard tick policy

[ Upstream commit 7dd0fdff145c5be7146d0ac06732ae3613412ac1 ]

Discard policy uses ack_notifiers to prevent injection of PIT interrupts
before EOI from the last one.

This patch changes the policy to always try to deliver the interrupt,
which makes a difference when its vector is in ISR.
Old implementation would drop the interrupt, but proposed one injects to
IRR, like real hardware would.

The old policy breaks legacy NMI watchdogs, where PIT is used through
virtual wire (LVT0): PIT never sends an interrupt before receiving EOI,
thus a guest deadlock with disabled interrupts will stop NMIs.

Note that NMI doesn't do EOI, so PIT also had to send a normal interrupt
through IOAPIC.  (KVM's PIT is deeply rotten and luckily not used much
in modern systems.)

Even though there is a chance of regressions, I think we can fix the
LVT0 NMI bug without introducing a new tick policy.

Cc: <stable@vger.kernel.org>
Reported-by: Yuki Shibuya <shibuya.yk@ncos.nec.co.jp>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agousb: hub: fix a typo in hub_port_init() leading to wrong logic
Oliver Neukum [Wed, 17 Feb 2016 10:52:43 +0000 (11:52 +0100)]
usb: hub: fix a typo in hub_port_init() leading to wrong logic

[ Upstream commit 0d5ce778c43bf888328231bcdce05d5c860655aa ]

A typo of j for i led to a logic bug. To rule out future
confusion, the variable names are made meaningful.

Signed-off-by: Oliver Neukum <ONeukum@suse.com>
CC: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoof: alloc anywhere from memblock if range not specified
Vinayak Menon [Mon, 22 Feb 2016 13:45:44 +0000 (19:15 +0530)]
of: alloc anywhere from memblock if range not specified

[ Upstream commit e53b50c0cbe392c946807abf7d07615a3c588642 ]

early_init_dt_alloc_reserved_memory_arch passes end as 0 to
__memblock_alloc_base, when limits are not specified. But
__memblock_alloc_base takes end value of 0 as MEMBLOCK_ALLOC_ACCESSIBLE
and limits the end to memblock.current_limit. This results in regions
never being placed in HIGHMEM area, for e.g. CMA.
Let __memblock_alloc_base allocate from anywhere in memory if limits are
not specified.

Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
Cc: stable@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomtip32xx: Handle FTL rebuild failure state during device initialization
Asai Thambi SP [Thu, 25 Feb 2016 05:18:20 +0000 (21:18 -0800)]
mtip32xx: Handle FTL rebuild failure state during device initialization

[ Upstream commit aae4a033868c496adae86fc6f9c3e0c405bbf360 ]

Allow device initialization to finish gracefully when it is in
FTL rebuild failure state. Also, recover device out of this state
after successfully secure erasing it.

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Vignesh Gunasekaran <vgunasekaran@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomtip32xx: fix incorrectly setting MTIP_DDF_SEC_LOCK_BIT
Asai Thambi SP [Mon, 11 May 2015 22:50:50 +0000 (15:50 -0700)]
mtip32xx: fix incorrectly setting MTIP_DDF_SEC_LOCK_BIT

[ Upstream commit ee04bed690cb49a49512a641405bac42d13c2b2a ]

Fix incorrectly setting MTIP_DDF_SEC_LOCK_BIT

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomtip32xx: Handle safe removal during IO
Asai Thambi SP [Thu, 25 Feb 2016 05:18:10 +0000 (21:18 -0800)]
mtip32xx: Handle safe removal during IO

[ Upstream commit 51c6570eb922146470c2fe660c34585414679bd6 ]

Flush inflight IOs using fsync_bdev() when the device is safely
removed. Also, block further IOs in device open function.

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Rajesh Kumar Sambandam <rsambandam@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomtip32xx: fix crash on surprise removal of the drive
Asai Thambi SP [Mon, 11 May 2015 22:53:18 +0000 (15:53 -0700)]
mtip32xx: fix crash on surprise removal of the drive

[ Upstream commit 2132a544727eb17f76bfef8b550a016a41c38821 ]

pci and block layers have changed a lot compared to when SRSI support was added.
Given the current state of pci and block layers, this driver do not have to do
any specific handling.

Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomtip32xx: fix rmmod issue
Asai Thambi SP [Mon, 11 May 2015 22:48:00 +0000 (15:48 -0700)]
mtip32xx: fix rmmod issue

[ Upstream commit 02b48265e7437bfe153af16337b14ee74f00905f ]

put_disk() need to be called after del_gendisk() to free the disk object structure.

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomtip32xx: Avoid issuing standby immediate cmd during FTL rebuild
Asai Thambi SP [Thu, 25 Feb 2016 05:17:32 +0000 (21:17 -0800)]
mtip32xx: Avoid issuing standby immediate cmd during FTL rebuild

[ Upstream commit d8a18d2d8f5de55666c6011ed175939d22c8e3d8 ]

Prevent standby immediate command from being issued in remove,
suspend and shutdown paths, while drive is in FTL rebuild process.

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Vignesh Gunasekaran <vgunasekaran@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomtip32xx: Print exact time when an internal command is interrupted
Asai Thambi SP [Thu, 25 Feb 2016 05:16:38 +0000 (21:16 -0800)]
mtip32xx: Print exact time when an internal command is interrupted

[ Upstream commit 5b7e0a8ac85e2dfd83830dc9e0b3554d153a37e3 ]

Print exact time when an internal command is interrupted.

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Rajesh Kumar Sambandam <rsambandam@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoquota: Fix possible GPF due to uninitialised pointers
Nikolay Borisov [Thu, 3 Mar 2016 09:54:57 +0000 (10:54 +0100)]
quota: Fix possible GPF due to uninitialised pointers

[ Upstream commit ab73ef46398e2c0159f3a71de834586422d2a44a ]

When dqget() in __dquot_initialize() fails e.g. due to IO error,
__dquot_initialize() will pass an array of uninitialized pointers to
dqput_all() and thus can lead to deference of random data. Fix the
problem by properly initializing the array.

CC: stable@vger.kernel.org
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoxfs: fix two memory leaks in xfs_attr_list.c error paths
Mateusz Guzik [Tue, 1 Mar 2016 22:51:09 +0000 (09:51 +1100)]
xfs: fix two memory leaks in xfs_attr_list.c error paths

[ Upstream commit 2e83b79b2d6c78bf1b4aa227938a214dcbddc83f ]

This plugs 2 trivial leaks in xfs_attr_shortform_list and
xfs_attr3_leaf_list_int.

Signed-off-by: Mateusz Guzik <mguzik@redhat.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agonfsd4: fix bad bounds checking
J. Bruce Fields [Tue, 1 Mar 2016 01:21:21 +0000 (20:21 -0500)]
nfsd4: fix bad bounds checking

[ Upstream commit 4aed9c46afb80164401143aa0fdcfe3798baa9d5 ]

A number of spots in the xdr decoding follow a pattern like

n = be32_to_cpup(p++);
READ_BUF(n + 4);

where n is a u32.  The only bounds checking is done in READ_BUF itself,
but since it's checking (n + 4), it won't catch cases where n is very
large, (u32)(-4) or higher.  I'm not sure exactly what the consequences
are, but we've seen crashes soon after.

Instead, just break these up into two READ_BUF()s.

Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agowatchdog: rc32434_wdt: fix ioctl error handling
Michael S. Tsirkin [Sun, 28 Feb 2016 15:44:09 +0000 (17:44 +0200)]
watchdog: rc32434_wdt: fix ioctl error handling

[ Upstream commit 10e7ac22cdd4d211cef99afcb9371b70cb175be6 ]

Calling return copy_to_user(...) in an ioctl will not do the right thing
if there's a pagefault: copy_to_user returns the number of bytes not
copied in this case.

Fix up watchdog/rc32434_wdt to do
return copy_to_user(...)) ?  -EFAULT : 0;

instead.

Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years ago[media] bttv: Width must be a multiple of 16 when capturing planar formats
Hans de Goede [Sun, 7 Feb 2016 11:24:29 +0000 (09:24 -0200)]
[media] bttv: Width must be a multiple of 16 when capturing planar formats

[ Upstream commit 5c915c68763889f0183a1cc61c84bb228b60124a ]

On my bttv card "Hauppauge WinTV [card=10]" capturing in YV12 fmt at max
size results in a solid green rectangle being captured (all colors 0 in
YUV).

This turns out to be caused by max-width (924) not being a multiple of 16.

We've likely never hit this problem before since normally xawtv / tvtime,
etc. will prefer packed pixel formats. But when using a video card which
is using xf86-video-modesetting + glamor, only planar XVideo fmts are
available, and xawtv will chose a matching capture format to avoid needing
to do conversion, triggering the solid green window problem.

Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoIB/srpt: Simplify srpt_handle_tsk_mgmt()
Bart Van Assche [Thu, 11 Feb 2016 19:03:09 +0000 (11:03 -0800)]
IB/srpt: Simplify srpt_handle_tsk_mgmt()

[ Upstream commit 51093254bf879bc9ce96590400a87897c7498463 ]

Let the target core check task existence instead of the SRP target
driver. Additionally, let the target core check the validity of the
task management request instead of the ib_srpt driver.

This patch fixes the following kernel crash:

BUG: unable to handle kernel NULL pointer dereference at 0000000000000001
IP: [<ffffffffa0565f37>] srpt_handle_new_iu+0x6d7/0x790 [ib_srpt]
Oops: 0002 [#1] SMP
Call Trace:
 [<ffffffffa05660ce>] srpt_process_completion+0xde/0x570 [ib_srpt]
 [<ffffffffa056669f>] srpt_compl_thread+0x13f/0x160 [ib_srpt]
 [<ffffffff8109726f>] kthread+0xcf/0xe0
 [<ffffffff81613cfc>] ret_from_fork+0x7c/0xb0

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Fixes: 3e4f574857ee ("ib_srpt: Convert TMR path to target_submit_tmr")
Tested-by: Alex Estrin <alex.estrin@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoX.509: Fix leap year handling again
David Howells [Wed, 24 Feb 2016 14:37:15 +0000 (14:37 +0000)]
X.509: Fix leap year handling again

[ Upstream commit ac4cbedfdf55455b4c447f17f0fa027dbf02b2a6 ]

There are still a couple of minor issues in the X.509 leap year handling:

 (1) To avoid doing a modulus-by-400 in addition to a modulus-by-100 when
     determining whether the year is a leap year or not, I divided the year
     by 100 after doing the modulus-by-100, thereby letting the compiler do
     one instruction for both, and then did a modulus-by-4.

     Unfortunately, I then passed the now-modified year value to mktime64()
     to construct a time value.

     Since this isn't a fast path and since mktime64() does a bunch of
     divisions, just condense down to "% 400".  It's also easier to read.

 (2) The default month length for any February where the year doesn't
     divide by four exactly is obtained from the month_length[] array where
     the value is 29, not 28.

     This is fixed by altering the table.

Reported-by: Rudolf Polzer <rpolzer@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoPKCS#7: Improve and export the X.509 ASN.1 time object decoder
David Howells [Wed, 29 Jul 2015 15:58:32 +0000 (16:58 +0100)]
PKCS#7: Improve and export the X.509 ASN.1 time object decoder

[ Upstream commit fd19a3d195be23e8d9d0d66576b96ea25eea8323 ]

Make the X.509 ASN.1 time object decoder fill in a time64_t rather than a
struct tm to make comparison easier (unfortunately, this makes readable
display less easy) and export it so that it can be used by the PKCS#7 code
too.

Further, tighten up its parsing to reject invalid dates (eg. weird
characters, non-existent hour numbers) and unsupported dates (eg. timezones
other than 'Z' or dates earlier than 1970).

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoX.509: Extract both parts of the AuthorityKeyIdentifier
David Howells [Mon, 20 Jul 2015 20:16:26 +0000 (21:16 +0100)]
X.509: Extract both parts of the AuthorityKeyIdentifier

[ Upstream commit b92e6570a992c7d793a209db282f68159368201c ]

Extract both parts of the AuthorityKeyIdentifier, not just the keyIdentifier,
as the second part can be used to match X.509 certificates by issuer and
serialNumber.

Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agommc: sdhci: fix data timeout (part 2)
Russell King [Tue, 26 Jan 2016 13:41:04 +0000 (13:41 +0000)]
mmc: sdhci: fix data timeout (part 2)

[ Upstream commit 7f05538af71c7d30b5fc821cbe9f318edc645961 ]

The calculation for the timeout based on the number of card clocks is
incorrect.  The calculation assumed:

timeout in microseconds = clock cycles / clock in Hz

which is clearly a several orders of magnitude wrong.  Fix this by
multiplying the clock cycles by 1000000 prior to dividing by the Hz
based clock.  Also, as per part 1, ensure that the division rounds
up.

As this needs 64-bit math via do_div(), avoid it if the clock cycles
is zero.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v3.15+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agommc: sdhci: fix data timeout (part 1)
Russell King [Tue, 26 Jan 2016 13:40:58 +0000 (13:40 +0000)]
mmc: sdhci: fix data timeout (part 1)

[ Upstream commit fafcfda9e78cae8796d1799f14e6457790797555 ]

The data timeout gives the minimum amount of time that should be
waited before timing out if no data is received from the card.
Simply dividing the nanosecond part by 1000 does not give this
required guarantee, since such a division rounds down.  Use
DIV_ROUND_UP() to give the desired timeout.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v3.15+
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agommc: sdhci-pxav3: fix higher speed mode capabilities
Russell King [Tue, 26 Jan 2016 13:40:47 +0000 (13:40 +0000)]
mmc: sdhci-pxav3: fix higher speed mode capabilities

[ Upstream commit 0ca33b4ad9cfc133bb3d93eec1ad0eea83d6f252 ]

Commit 1140011ee9d9 ("mmc: sdhci-pxav3: Modify clock settings for the
SDR50 and DDR50 modes") broke any chance of the SDR50 or DDR50 modes
being used.

The commit claims that SDR50 and DDR50 require clock adjustments in
the SDIO3 Configuration register, which is located via the "conf-sdio3"
resource.  However, when this resource is given, we fail to read the
host capabilities 1 register, resulting in host->caps1 being zero.
Hence, both SDHCI_SUPPORT_SDR50 and SDHCI_SUPPORT_DDR50 bits remain
zero, disabling the SDR50 and DDR50 modes.

The underlying idea in this function appears to be to read the device
capabilities, modify them, and set SDHCI_QUIRK_MISSING_CAPS to cause
our modified capabilities to be used.  Implement exactly that.

Fixes: 1140011ee9d9 ("mmc: sdhci-pxav3: Modify clock settings for the SDR50 and DDR50 modes")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: stable@vger.kernel.org # v4.5+
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoBluetooth: btusb: Add a new AR3012 ID 04ca:3014
Dmitry Tunin [Sun, 28 Feb 2016 08:04:06 +0000 (11:04 +0300)]
Bluetooth: btusb: Add a new AR3012 ID 04ca:3014

[ Upstream commit 81d90442eac779938217c3444b240aa51fd3db47 ]

T: Bus=01 Lev=01 Prnt=01 Port=04 Cnt=03 Dev#= 5 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=04ca ProdID=3014 Rev=00.02
C: #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb

BugLink: https://bugs.launchpad.net/bugs/1546694
Signed-off-by: Dmitry Tunin <hanipouspilot@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agocrypto: ccp - memset request context to zero during import
Tom Lendacky [Thu, 25 Feb 2016 22:48:13 +0000 (16:48 -0600)]
crypto: ccp - memset request context to zero during import

[ Upstream commit ce0ae266feaf35930394bd770c69778e4ef03ba9 ]

Since a crypto_ahash_import() can be called against a request context
that has not had a crypto_ahash_init() performed, the request context
needs to be cleared to insure there is no random data present. If not,
the random data can result in a kernel oops during crypto_ahash_update().

Cc: <stable@vger.kernel.org> # 3.14.x-
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoRAID5: check_reshape() shouldn't call mddev_suspend
Shaohua Li [Thu, 25 Feb 2016 01:38:28 +0000 (17:38 -0800)]
RAID5: check_reshape() shouldn't call mddev_suspend

[ Upstream commit 27a353c026a879a1001e5eac4bda75b16262c44a ]

check_reshape() is called from raid5d thread. raid5d thread shouldn't
call mddev_suspend(), because mddev_suspend() waits for all IO finish
but IO is handled in raid5d thread, we could easily deadlock here.

This issue is introduced by
738a273 ("md/raid5: fix allocation of 'scribble' array.")

Cc: stable@vger.kernel.org (v4.1+)
Reported-and-tested-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomd/raid5: Compare apples to apples (or sectors to sectors)
Jes Sorensen [Tue, 16 Feb 2016 21:44:24 +0000 (16:44 -0500)]
md/raid5: Compare apples to apples (or sectors to sectors)

[ Upstream commit e7597e69dec59b65c5525db1626b9d34afdfa678 ]

'max_discard_sectors' is in sectors, while 'stripe' is in bytes.

This fixes the problem where DISCARD would get disabled on some larger
RAID5 configurations (6 or more drives in my testing), while it worked
as expected with smaller configurations.

Fixes: 620125f2bf8 ("MD: raid5 trim support")
Cc: stable@vger.kernel.org v3.7+
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoPCI: Disable IO/MEM decoding for devices with non-compliant BARs
Bjorn Helgaas [Thu, 25 Feb 2016 20:35:57 +0000 (14:35 -0600)]
PCI: Disable IO/MEM decoding for devices with non-compliant BARs

[ Upstream commit b84106b4e2290c081cdab521fa832596cdfea246 ]

The PCI config header (first 64 bytes of each device's config space) is
defined by the PCI spec so generic software can identify the device and
manage its usage of I/O, memory, and IRQ resources.

Some non-spec-compliant devices put registers other than BARs where the
BARs should be.  When the PCI core sizes these "BARs", the reads and writes
it does may have unwanted side effects, and the "BAR" may appear to
describe non-sensical address space.

Add a flag bit to mark non-compliant devices so we don't touch their BARs.
Turn off IO/MEM decoding to prevent the devices from consuming address
space, since we can't read the BARs to find out what that address space
would be.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Andi Kleen <ak@linux.intel.com>
CC: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoPCI: Add dev->has_secondary_link to track downstream PCIe links
Yijing Wang [Thu, 21 May 2015 07:05:02 +0000 (15:05 +0800)]
PCI: Add dev->has_secondary_link to track downstream PCIe links

[ Upstream commit d0751b98dfa391f862e02dc36a233a54615e3f1d ]

A PCIe Port is an interface to a Link.  A Root Port is a PCI-PCI bridge in
a Root Complex and has a Link on its secondary (downstream) side.  For
other Ports, the Link may be on either the upstream (closer to the Root
Complex) or downstream side of the Port.

The usual topology has a Root Port connected to an Upstream Port.  We
previously assumed this was the only possible topology, and that a
Downstream Port's Link was always on its downstream side, like this:

                  +---------------------+
  +------+        |          Downstream |
  | Root |        | Upstream       Port +--Link--
  | Port +--Link--+ Port                |
  +------+        |          Downstream |
                  |                Port +--Link--
                  +---------------------+

But systems do exist (see URL below) where the Root Port is connected to a
Downstream Port.  In this case, a Downstream Port's Link may be on either
the upstream or downstream side:

                  +---------------------+
  +------+        |            Upstream |
  | Root |        | Downstream     Port +--Link--
  | Port +--Link--+ Port                |
  +------+        |          Downstream |
                  |                Port +--Link--
                  +---------------------+

We can't use the Port type to determine which side the Link is on, so add a
bit in struct pci_dev to keep track.

A Root Port's Link is always on the Port's secondary side.  A component
(Endpoint or Port) on the other end of the Link obviously has the Link on
its upstream side.  If that component is a Port, it is part of a Switch or
a Bridge.  A Bridge has a PCI or PCI-X bus on its secondary side, not a
Link.  The internal bus of a Switch connects the Port to another Port whose
Link is on the downstream side.

[bhelgaas: changelog, comment, cache "type", use if/else]
Link: http://lkml.kernel.org/r/54EB81B2.4050904@pobox.com
Link: https://bugzilla.kernel.org/show_bug.cgi?id=94361
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomtd: onenand: fix deadlock in onenand_block_markbad
Aaro Koskinen [Sat, 20 Feb 2016 20:27:48 +0000 (22:27 +0200)]
mtd: onenand: fix deadlock in onenand_block_markbad

[ Upstream commit 5e64c29e98bfbba1b527b0a164f9493f3db9e8cb ]

Commit 5942ddbc500d ("mtd: introduce mtd_block_markbad interface")
incorrectly changed onenand_block_markbad() to call mtd_block_markbad
instead of onenand_chip's block_markbad function. As a result the function
will now recurse and deadlock. Fix by reverting the change.

Fixes: 5942ddbc500d ("mtd: introduce mtd_block_markbad interface")
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoaic7xxx: Fix queue depth handling
Alan [Mon, 15 Feb 2016 18:53:15 +0000 (18:53 +0000)]
aic7xxx: Fix queue depth handling

[ Upstream commit 5a51a7abca133860a6f4429655a9eda3c4afde32 ]

We were setting the queue depth correctly, then setting it back to
two. If you hit this as a bisection point then please send me an email
as it would imply we've been hiding other bugs with this one.

Cc: <stable@vger.kernel.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoaacraid: Fix memory leak in aac_fib_map_free
Raghava Aditya Renukunta [Wed, 3 Feb 2016 23:06:02 +0000 (15:06 -0800)]
aacraid: Fix memory leak in aac_fib_map_free

[ Upstream commit f88fa79a61726ce9434df9b4aede36961f709f17 ]

aac_fib_map_free() calls pci_free_consistent() without checking that
dev->hw_fib_va is not NULL and dev->max_fib_size is not zero.If they are
indeed NULL/0, this will result in a hang as pci_free_consistent() will
attempt to invalidate cache for the entire 64-bit address space
(which would take a very long time).

Fixed by adding a check to make sure that dev->hw_fib_va and
dev->max_fib_size are not NULL and 0 respectively.

Fixes: 9ad5204d6 - "[SCSI]aacraid: incorrect dma mapping mask during blinked recover or user initiated reset"
Cc: stable@vger.kernel.org
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoaacraid: Fix RRQ overload
Raghava Aditya Renukunta [Wed, 3 Feb 2016 23:06:00 +0000 (15:06 -0800)]
aacraid: Fix RRQ overload

[ Upstream commit 3f4ce057d51a9c0ed9b01ba693df685d230ffcae ]

The driver utilizes an array of atomic variables to keep track of IO
submissions to each vector. To submit an IO multiple threads iterate
through the array to find a vector which has empty slots to send an
IO. The reading and updating of the variable is not atomic, causing race
conditions when a thread uses a full vector to submit an IO.

Fixed by mapping each FIB to a vector, the submission path then uses
said vector to submit IO thereby removing the possibly of a race
condition.The vector assignment is started from 1 since vector 0 is
reserved for the use of AIF management FIBS.If the number of MSIx
vectors is 1 (MSI or INTx mode) then all the fibs are allocated to
vector 0.

Fixes: 495c0217 "aacraid: MSI-x support"
Cc: stable@vger.kernel.org # v4.1
Signed-off-by: Raghava Aditya Renukunta <raghavaaditya.renukunta@pmcs.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoBluetooth: Add new AR3012 ID 0489:e095
Dmitry Tunin [Tue, 9 Feb 2016 21:49:11 +0000 (00:49 +0300)]
Bluetooth: Add new AR3012 ID 0489:e095

[ Upstream commit 28c971d82fb58ef7cba22e5308be6d2d2590473d ]

T: Bus=01 Lev=01 Prnt=01 Port=04 Cnt=02 Dev#= 3 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0489 ProdID=e095 Rev=00.01
C: #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb

This device requires ar3k/AthrBT_0x31010100.dfu and
ar3k/ramps_0x31010100_40.dfu firmware files that are not in
linux-firmware yet.

BugLink: https://bugs.launchpad.net/bugs/1542944
Signed-off-by: Dmitry Tunin <hanipouspilot@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoBluetooth: btusb: Add new AR3012 ID 13d3:3395
Dmitry Tunin [Wed, 10 Feb 2016 12:33:17 +0000 (15:33 +0300)]
Bluetooth: btusb: Add new AR3012 ID 13d3:3395

[ Upstream commit 609574eb46335cfac1421a07c0505627cbbab1f0 ]

T: Bus=03 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=13d3 ProdID=3395 Rev=00.01
C: #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb

BugLink: https://bugs.launchpad.net/bugs/1542564
Reported-and-tested-by: Christopher Simerly <kilikopela29@gmail.com>
Signed-off-by: Dmitry Tunin <hanipouspilot@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoperf tools: Dont stop PMU parsing on alias parse error
Andi Kleen [Wed, 17 Feb 2016 22:44:55 +0000 (14:44 -0800)]
perf tools: Dont stop PMU parsing on alias parse error

[ Upstream commit 940db6dcd3f4659303fdf6befe7416adc4d24118 ]

When an error happens during alias parsing currently the complete
parsing of all attributes of the PMU is stopped. This is breaks old perf
on a newer kernel that may have not-yet-know alias attributes (such as
.scale or .per-pkg).

Continue when some attribute is unparseable.

This is IMHO a stable candidate and should be backported to older
versions to avoid problems with newer kernels.

v2: Print warnings when something goes wrong.
v3: Change warning to debug output

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: stable@vger.kernel.org # v3.6+
Link: http://lkml.kernel.org/r/1455749095-18358-1-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agodm: fix excessive dm-mq context switching
Mike Snitzer [Fri, 5 Feb 2016 13:49:01 +0000 (08:49 -0500)]
dm: fix excessive dm-mq context switching

[ Upstream commit 6acfe68bac7e6f16dc312157b1fa6e2368985013 ]

Request-based DM's blk-mq support (dm-mq) was reported to be 50% slower
than if an underlying null_blk device were used directly.  One of the
reasons for this drop in performance is that blk_insert_clone_request()
was calling blk_mq_insert_request() with @async=true.  This forced the
use of kblockd_schedule_delayed_work_on() to run the blk-mq hw queues
which ushered in ping-ponging between process context (fio in this case)
and kblockd's kworker to submit the cloned request.  The ftrace
function_graph tracer showed:

  kworker-2013  =>   fio-12190
  fio-12190    =>  kworker-2013
  ...
  kworker-2013  =>   fio-12190
  fio-12190    =>  kworker-2013
  ...

Fixing blk_insert_clone_request()'s blk_mq_insert_request() call to
_not_ use kblockd to submit the cloned requests isn't enough to
eliminate the observed context switches.

In addition to this dm-mq specific blk-core fix, there are 2 DM core
fixes to dm-mq that (when paired with the blk-core fix) completely
eliminate the observed context switching:

1)  don't blk_mq_run_hw_queues in blk-mq request completion

    Motivated by desire to reduce overhead of dm-mq, punting to kblockd
    just increases context switches.

    In my testing against a really fast null_blk device there was no benefit
    to running blk_mq_run_hw_queues() on completion (and no other blk-mq
    driver does this).  So hopefully this change doesn't induce the need for
    yet another revert like commit 621739b00e16ca2d !

2)  use blk_mq_complete_request() in dm_complete_request()

    blk_complete_request() doesn't offer the traditional q->mq_ops vs
    .request_fn branching pattern that other historic block interfaces
    do (e.g. blk_get_request).  Using blk_mq_complete_request() for
    blk-mq requests is important for performance.  It should be noted
    that, like blk_complete_request(), blk_mq_complete_request() doesn't
    natively handle partial completions -- but the request-based
    DM-multipath target does provide the required partial completion
    support by dm.c:end_clone_bio() triggering requeueing of the request
    via dm-mpath.c:multipath_end_io()'s return of DM_ENDIO_REQUEUE.

dm-mq fix #2 is _much_ more important than #1 for eliminating the
context switches.
Before: cpu          : usr=15.10%, sys=59.39%, ctx=7905181, majf=0, minf=475
After:  cpu          : usr=20.60%, sys=79.35%, ctx=2008, majf=0, minf=472

With these changes multithreaded async read IOPs improved from ~950K
to ~1350K for this dm-mq stacked on null_blk test-case.  The raw read
IOPs of the underlying null_blk device for the same workload is ~1950K.

Fixes: 7fb4898e0 ("block: add blk-mq support to blk_insert_cloned_request()")
Fixes: bfebd1cdb ("dm: add full blk-mq support to request-based DM")
Cc: stable@vger.kernel.org # 4.1+
Reported-by: Sagi Grimberg <sagig@dev.mellanox.co.il>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoext4: iterate over buffer heads correctly in move_extent_per_page()
Eryu Guan [Sun, 21 Feb 2016 23:38:44 +0000 (18:38 -0500)]
ext4: iterate over buffer heads correctly in move_extent_per_page()

[ Upstream commit 87f9a031af48defee9f34c6aaf06d6f1988c244d ]

In commit bcff24887d00 ("ext4: don't read blocks from disk after extents
being swapped") bh is not updated correctly in the for loop and wrong
data has been written to disk. generic/324 catches this on sub-page
block size ext4.

Fixes: bcff24887d00 ("ext4: don't read blocks from disk after extentsbeing swapped")
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agotpm_crb: tpm2_shutdown() must be called before tpm_chip_unregister()
Jarkko Sakkinen [Thu, 18 Feb 2016 20:11:29 +0000 (22:11 +0200)]
tpm_crb: tpm2_shutdown() must be called before tpm_chip_unregister()

[ Upstream commit 99cda8cb4639de81cde785b5bab9bc52e916e594 ]

Wrong call order.

Reported-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Fixes: 74d6b3ceaa17
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years ago[media] saa7134: Fix bytesperline not being set correctly for planar formats
Hans de Goede [Sun, 14 Feb 2016 19:51:37 +0000 (17:51 -0200)]
[media] saa7134: Fix bytesperline not being set correctly for planar formats

[ Upstream commit 3e71da19f9dc22e39a755d6ae9678661abb66adc ]

bytesperline should be the bytesperline for the first plane for planar
formats, not that of all planes combined.

This fixes a crash in xawtv caused by the wrong bpl.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1305389
Reported-and-tested-by: Stas Sergeev <stsp@list.ru>
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years ago[media] adv7511: TX_EDID_PRESENT is still 1 after a disconnect
Hans Verkuil [Wed, 10 Feb 2016 11:32:25 +0000 (09:32 -0200)]
[media] adv7511: TX_EDID_PRESENT is still 1 after a disconnect

[ Upstream commit b339a72e04a62f0b1882c43492fc712f1176b3e6 ]

The V4L2_CID_TX_EDID_PRESENT control reports if an EDID is present.
The adv7511 however still reported the EDID present after disconnecting
the HDMI cable. Fix the logic regarding this control. And when the EDID
is disconnected also call ADV7511_EDID_DETECT to notify the bridge driver.
This was also missing.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: <stable@vger.kernel.org> # for v3.12 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoscripts/coccinelle: modernize &
Julia Lawall [Wed, 17 Feb 2016 23:16:14 +0000 (00:16 +0100)]
scripts/coccinelle: modernize &

[ Upstream commit 1b669e713f277a4d4b3cec84e13d16544ac8286d ]

& is no longer allowed in column 0, since Coccinelle 1.0.4.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Tested-by: Nishanth Menon <nm@ti.com>
Cc: stable@vger.kernel.org
Signed-off-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoHID: fix hid_ignore_special_drivers module parameter
Benjamin Tissoires [Fri, 12 Feb 2016 16:10:37 +0000 (17:10 +0100)]
HID: fix hid_ignore_special_drivers module parameter

[ Upstream commit 4392bf333388cabdad5afe5b1500002d7b9c318e ]

hid_ignore_special_drivers works fine until hid_scan_report autodetects and
reassign devices (for hid-multitouch, hid-microsoft and hid-rmi).

Simplify the handling of the parameter: if it is there, use hid-generic, no
matter what, and if not, scan the device or rely on the hid_have_special_driver
table.

This was detected while trying to disable hid-multitouch on a Surface Pro cover
which prevented to use the keyboard.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
CC: stable@vger.kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agousb: retry reset if a device times out
Oliver Neukum [Wed, 10 Feb 2016 10:33:18 +0000 (11:33 +0100)]
usb: retry reset if a device times out

[ Upstream commit 264904ccc33c604d4b3141bbd33808152dfac45b ]

Some devices I got show an inability to operate right after
power on if they are already connected. They are beyond recovery
if the descriptors are requested multiple times. So in case of
a timeout we rather bail early and reset again. But it must be
done only on the first loop lest we get into a reset/time out
spiral that can be overcome with a retry.

This patch is a rework of a patch that fell through the cracks.
http://www.spinics.net/lists/linux-usb/msg103263.html

Signed-off-by: Oliver Neukum <oneukum@suse.com>
CC: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoARM: dts: armada-375: use armada-370-sata for SATA
Lior Amsalem [Wed, 10 Feb 2016 16:29:15 +0000 (17:29 +0100)]
ARM: dts: armada-375: use armada-370-sata for SATA

[ Upstream commit b3a7f31eb7375633cd6a742f19488fc5a4208b36 ]

The Armada 375 has the same SATA IP as Armada 370 and Armada XP, which
requires the PHY speed to be set in the LP_PHY_CTL register for SATA
hotplug to work.

Therefore, this commit updates the compatible string used to describe
the SATA IP in Armada 375 from marvell,orion-sata to
marvell,armada-370-sata.

Fixes: 4de59085091f753d08c8429d756b46756ab94665 ("ARM: mvebu: add Device Tree description of the Armada 375 SoC")
Cc: <stable@vger.kernel.org>
Signed-off-by: Lior Amsalem <alior@marvell.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agotools/hv: Use include/uapi with __EXPORTED_HEADERS__
Kamal Mostafa [Thu, 28 Jan 2016 06:29:33 +0000 (22:29 -0800)]
tools/hv: Use include/uapi with __EXPORTED_HEADERS__

[ Upstream commit 50fe6dd10069e7c062e27f29606f6e91ea979399 ]

Use the local uapi headers to keep in sync with "recently" added #define's
(e.g. VSS_OP_REGISTER1).

Fixes: 3eb2094c59e8 ("Adding makefile for tools/hv")
Cc: <stable@vger.kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agostaging: comedi: ni_tiocmd: change mistaken use of start_src for start_arg
Spencer E. Olson [Tue, 12 Jan 2016 17:33:18 +0000 (10:33 -0700)]
staging: comedi: ni_tiocmd: change mistaken use of start_src for start_arg

[ Upstream commit 1fd24a4702d2af0ea4d5845126cf57d4d1796216 ]

This fixes a bug in function ni_tio_input_inttrig().  The trigger number
should be compared to cmd->start_arg, not cmd->start_src.

Fixes: 6a760394d7eb ("staging: comedi: ni_tiocmd: clarify the cmd->start_arg validation and use")
Cc: <stable@vger.kernel.org> # 3.17+
Signed-off-by: Spencer E. Olson <olsonse@umich.edu>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomei: bus: move driver api functions at the start of the file
Alexander Usyskin [Sun, 7 Feb 2016 21:35:32 +0000 (23:35 +0200)]
mei: bus: move driver api functions at the start of the file

[ Upstream commit 6238299774377b12c3e24507b100b2687eb5ea32 ]

To make the file more organize move mei client driver api
to the start of the file and add Kdoc.

There are no functional changes in this patch.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agonet: irda: Fix use-after-free in irtty_open()
Peter Hurley [Sun, 10 Jan 2016 01:48:45 +0000 (17:48 -0800)]
net: irda: Fix use-after-free in irtty_open()

[ Upstream commit 401879c57f01cbf2da204ad2e8db910525c6dbea ]

The N_IRDA line discipline may access the previous line discipline's closed
and already-fre private data on open [1].

The tty->disc_data field _never_ refers to valid data on entry to the
line discipline's open() method. Rather, the ldisc is expected to
initialize that field for its own use for the lifetime of the instance
(ie. from open() to close() only).

[1]
    ==================================================================
    BUG: KASAN: use-after-free in irtty_open+0x422/0x550 at addr ffff8800331dd068
    Read of size 4 by task a.out/13960
    =============================================================================
    BUG kmalloc-512 (Tainted: G    B          ): kasan: bad access detected
    -----------------------------------------------------------------------------
    ...
    Call Trace:
     [<ffffffff815fa2ae>] __asan_report_load4_noabort+0x3e/0x40 mm/kasan/report.c:279
     [<ffffffff836938a2>] irtty_open+0x422/0x550 drivers/net/irda/irtty-sir.c:436
     [<ffffffff829f1b80>] tty_ldisc_open.isra.2+0x60/0xa0 drivers/tty/tty_ldisc.c:447
     [<ffffffff829f21c0>] tty_set_ldisc+0x1a0/0x940 drivers/tty/tty_ldisc.c:567
     [<     inline     >] tiocsetd drivers/tty/tty_io.c:2650
     [<ffffffff829da49e>] tty_ioctl+0xace/0x1fd0 drivers/tty/tty_io.c:2883
     [<     inline     >] vfs_ioctl fs/ioctl.c:43
     [<ffffffff816708ac>] do_vfs_ioctl+0x57c/0xe60 fs/ioctl.c:607
     [<     inline     >] SYSC_ioctl fs/ioctl.c:622
     [<ffffffff81671204>] SyS_ioctl+0x74/0x80 fs/ioctl.c:613
     [<ffffffff852a7876>] entry_SYSCALL_64_fastpath+0x16/0x7a

Reported-and-tested-by: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agocrypto: ccp - Don't assume export/import areas are aligned
Tom Lendacky [Tue, 2 Feb 2016 17:38:21 +0000 (11:38 -0600)]
crypto: ccp - Don't assume export/import areas are aligned

[ Upstream commit b31dde2a5cb1bf764282abf934266b7193c2bc7c ]

Use a local variable for the exported and imported state so that
alignment is not an issue. On export, set a local variable from the
request context and then memcpy the contents of the local variable to
the export memory area. On import, memcpy the import memory area into
a local variable and then use the local variable to set the request
context.

Cc: <stable@vger.kernel.org> # 3.14.x-
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agocrypto: ccp - Limit the amount of information exported
Tom Lendacky [Fri, 29 Jan 2016 18:45:14 +0000 (12:45 -0600)]
crypto: ccp - Limit the amount of information exported

[ Upstream commit d1662165ae612ec8b5f94a6b07e65ea58b6dce34 ]

Since the exported information can be exposed to user-space, instead of
exporting the entire request context only export the minimum information
needed.

Cc: <stable@vger.kernel.org> # 3.14.x-
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years ago[media] pwc: Add USB id for Philips Spc880nc webcam
Hans de Goede [Fri, 22 Jan 2016 10:53:55 +0000 (08:53 -0200)]
[media] pwc: Add USB id for Philips Spc880nc webcam

[ Upstream commit 7445e45d19a09e5269dc85f17f9635be29d2f76c ]

SPC 880NC PC camera discussions:
http://www.pclinuxos.com/forum/index.php/topic,135688.0.html

Cc: stable@vger.kernel.org
Reported-by: Kikim <klucznik0@op.pl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years ago[media] media: v4l2-compat-ioctl32: fix missing length copy in put_v4l2_buffer32
Tiffany Lin [Tue, 19 Jan 2016 07:56:50 +0000 (05:56 -0200)]
[media] media: v4l2-compat-ioctl32: fix missing length copy in put_v4l2_buffer32

[ Upstream commit 7df5ab8774aa383c6d2bff00688d004585d96dfd ]

In v4l2-compliance utility, test QUERYBUF required correct length
value to go through each planar to check planar's length in
multi-planar buffer type

Signed-off-by: Tiffany Lin <tiffany.lin@mediatek.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: <stable@vger.kernel.org> # for v3.7 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agotty: Fix GPF in flush_to_ldisc(), part 2
Peter Hurley [Mon, 11 Jan 2016 04:36:12 +0000 (20:36 -0800)]
tty: Fix GPF in flush_to_ldisc(), part 2

[ Upstream commit f33798deecbd59a2955f40ac0ae2bc7dff54c069 ]

commit 9ce119f318ba ("tty: Fix GPF in flush_to_ldisc()") fixed a
GPF caused by a line discipline which does not define a receive_buf()
method.

However, the vt driver (and speakup driver also) pushes selection
data directly to the line discipline receive_buf() method via
tty_ldisc_receive_buf(). Fix the same problem in tty_ldisc_receive_buf().

Cc: <stable@vger.kernel.org>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoclk: rockchip: add hclk_cpubus to the list of rk3188 critical clocks
Alexander Kochetkov [Tue, 26 Jan 2016 13:34:00 +0000 (16:34 +0300)]
clk: rockchip: add hclk_cpubus to the list of rk3188 critical clocks

[ Upstream commit e8b63288b37dbb8457b510c9d96f6006da4653f6 ]

hclk_cpubus needs to keep running because it is needed for devices like
the rom, i2s0 or spdif to be accessible via cpu. Without that all
accesses to devices (readl/writel) return wrong data. So add it
to the list of critical clocks.

Fixes: 78eaf6095cc763c ("clk: rockchip: disable unused clocks")
Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Cc: stable@vger.kernel.org # 4.1.x-
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoclk: rockchip: Add pclk_peri to critical clocks on RK3066/RK3188
Romain Perier [Sun, 23 Aug 2015 09:32:37 +0000 (11:32 +0200)]
clk: rockchip: Add pclk_peri to critical clocks on RK3066/RK3188

[ Upstream commit 3bba75a2ec32bd5fa7024a4de3b8cf9ee113a76a ]

Now that the rockchip clock subsystem does clock gating with GPIO banks,
these are no longer enabled once during probe and no longer stay enabled
for eternity. When all these clocks are disabled, the parent clock pclk_peri
might be disabled too, as no other child claims it. So, we need to add pclk_peri
to the critical clocks.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Tested-by: Michael Niewoehner <linux@mniewoehner.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoclk: rockchip: add pclk_cpu to the list of rk3188 critical clocks
Michael Niewoehner [Tue, 25 Aug 2015 20:22:07 +0000 (22:22 +0200)]
clk: rockchip: add pclk_cpu to the list of rk3188 critical clocks

[ Upstream commit 1166160ab531198f7abc773992c0e04d0f9b7600 ]

pclk_cpu needs to keep running because it is needed for devices like
the act8865 regulator but with the recent gpio clock handling this is
not always the case anymore. So add it to the list of critical clocks.

Signed-off-by: Michael Niewoehner <linux@mniewoehner.de>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agocrypto: ccp - Add hash state import and export support
Tom Lendacky [Tue, 12 Jan 2016 17:17:38 +0000 (11:17 -0600)]
crypto: ccp - Add hash state import and export support

[ Upstream commit 952bce9792e6bf36fda09c2e5718abb5d9327369 ]

Commit 8996eafdcbad ("crypto: ahash - ensure statesize is non-zero")
added a check to prevent ahash algorithms from successfully registering
if the import and export functions were not implemented. This prevents
an oops in the hash_accept function of algif_hash. This commit causes
the ccp-crypto module SHA support and AES CMAC support from successfully
registering and causing the ccp-crypto module load to fail because the
ahash import and export functions are not implemented.

Update the CCP Crypto API support to provide import and export support
for ahash algorithms.

Cc: <stable@vger.kernel.org> # 3.14.x-
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoEDAC, amd64_edac: Shift wrapping issue in f1x_get_norm_dct_addr()
Dan Carpenter [Wed, 20 Jan 2016 09:54:51 +0000 (12:54 +0300)]
EDAC, amd64_edac: Shift wrapping issue in f1x_get_norm_dct_addr()

[ Upstream commit 6f3508f61c814ee852c199988a62bd954c50dfc1 ]

dct_sel_base_off is declared as a u64 but we're only using the lower 32
bits because of a shift wrapping bug. This can possibly truncate the
upper 16 bits of DctSelBaseOffset[47:26], causing us to misdecode the CS
row.

Fixes: c8e518d5673d ('amd64_edac: Sanitize f10_get_base_addr_offset')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20160120095451.GB19898@mwanda
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agox86/iopl/64: Properly context-switch IOPL on Xen PV
Andy Lutomirski [Tue, 5 Apr 2016 19:24:24 +0000 (12:24 -0700)]
x86/iopl/64: Properly context-switch IOPL on Xen PV

commit b7a584598aea7ca73140cb87b40319944dd3393f upstream.

On Xen PV, regs->flags doesn't reliably reflect IOPL and the
exit-to-userspace code doesn't change IOPL.  We need to context
switch it manually.

I'm doing this without going through paravirt because this is
specific to Xen PV.  After the dust settles, we can merge this with
the 32-bit code, tidy up the iopl syscall implementation, and remove
the set_iopl pvop entirely.

Fixes XSA-171.

Reviewewd-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/693c3bd7aeb4d3c27c92c622b7d0f554a458173c.1458162709.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[ kamal: backport to 4.2-stable: no X86_FEATURE_XENPV so just call
  xen_pv_domain() directly ]
Acked-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years ago[media] usbvision: fix crash on detecting device with invalid configuration
Vladis Dronov [Mon, 16 Nov 2015 17:55:11 +0000 (15:55 -0200)]
[media] usbvision: fix crash on detecting device with invalid configuration

[ Upstream commit fa52bd506f274b7619955917abfde355e3d19ffe ]

The usbvision driver crashes when a specially crafted usb device with invalid
number of interfaces or endpoints is detected. This fix adds checks that the
device has proper configuration expected by the driver.

Reported-by: Ralf Spenneberg <ralf@spenneberg.net>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoinclude/linux/poison.h: fix LIST_POISON{1,2} offset
Vasily Kulikov [Wed, 9 Sep 2015 22:36:00 +0000 (15:36 -0700)]
include/linux/poison.h: fix LIST_POISON{1,2} offset

[ Upstream commit 8a5e5e02fc83aaf67053ab53b359af08c6c49aaf ]

Poison pointer values should be small enough to find a room in
non-mmap'able/hardly-mmap'able space.  E.g.  on x86 "poison pointer space"
is located starting from 0x0.  Given unprivileged users cannot mmap
anything below mmap_min_addr, it should be safe to use poison pointers
lower than mmap_min_addr.

The current poison pointer values of LIST_POISON{1,2} might be too big for
mmap_min_addr values equal or less than 1 MB (common case, e.g.  Ubuntu
uses only 0x10000).  There is little point to use such a big value given
the "poison pointer space" below 1 MB is not yet exhausted.  Changing it
to a smaller value solves the problem for small mmap_min_addr setups.

The values are suggested by Solar Designer:
http://www.openwall.com/lists/oss-security/2015/05/02/6

Signed-off-by: Vasily Kulikov <segoon@openwall.com>
Cc: Solar Designer <solar@openwall.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoKEYS: Fix handling of stored error in a negatively instantiated user key
David Howells [Tue, 24 Nov 2015 21:36:31 +0000 (21:36 +0000)]
KEYS: Fix handling of stored error in a negatively instantiated user key

[ Upstream commit 096fe9eaea40a17e125569f9e657e34cdb6d73bd ]

If a user key gets negatively instantiated, an error code is cached in the
payload area.  A negatively instantiated key may be then be positively
instantiated by updating it with valid data.  However, the ->update key
type method must be aware that the error code may be there.

The following may be used to trigger the bug in the user key type:

    keyctl request2 user user "" @u
    keyctl add user user "a" @u

which manifests itself as:

BUG: unable to handle kernel paging request at 00000000ffffff8a
IP: [<ffffffff810a376f>] __call_rcu.constprop.76+0x1f/0x280 kernel/rcu/tree.c:3046
PGD 7cc30067 PUD 0
Oops: 0002 [#1] SMP
Modules linked in:
CPU: 3 PID: 2644 Comm: a.out Not tainted 4.3.0+ #49
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff88003ddea700 ti: ffff88003dd88000 task.ti: ffff88003dd88000
RIP: 0010:[<ffffffff810a376f>]  [<ffffffff810a376f>] __call_rcu.constprop.76+0x1f/0x280
 [<ffffffff810a376f>] __call_rcu.constprop.76+0x1f/0x280 kernel/rcu/tree.c:3046
RSP: 0018:ffff88003dd8bdb0  EFLAGS: 00010246
RAX: 00000000ffffff82 RBX: 0000000000000000 RCX: 0000000000000001
RDX: ffffffff81e3fe40 RSI: 0000000000000000 RDI: 00000000ffffff82
RBP: ffff88003dd8bde0 R08: ffff88007d2d2da0 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88003e8073c0 R12: 00000000ffffff82
R13: ffff88003dd8be68 R14: ffff88007d027600 R15: ffff88003ddea700
FS:  0000000000b92880(0063) GS:ffff88007fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00000000ffffff8a CR3: 000000007cc5f000 CR4: 00000000000006e0
Stack:
 ffff88003dd8bdf0 ffffffff81160a8a 0000000000000000 00000000ffffff82
 ffff88003dd8be68 ffff88007d027600 ffff88003dd8bdf0 ffffffff810a39e5
 ffff88003dd8be20 ffffffff812a31ab ffff88007d027600 ffff88007d027620
Call Trace:
 [<ffffffff810a39e5>] kfree_call_rcu+0x15/0x20 kernel/rcu/tree.c:3136
 [<ffffffff812a31ab>] user_update+0x8b/0xb0 security/keys/user_defined.c:129
 [<     inline     >] __key_update security/keys/key.c:730
 [<ffffffff8129e5c1>] key_create_or_update+0x291/0x440 security/keys/key.c:908
 [<     inline     >] SYSC_add_key security/keys/keyctl.c:125
 [<ffffffff8129fc21>] SyS_add_key+0x101/0x1e0 security/keys/keyctl.c:60
 [<ffffffff8185f617>] entry_SYSCALL_64_fastpath+0x12/0x6a arch/x86/entry/entry_64.S:185

Note the error code (-ENOKEY) in EDX.

A similar bug can be tripped by:

    keyctl request2 trusted user "" @u
    keyctl add trusted user "a" @u

This should also affect encrypted keys - but that has to be correctly
parameterised or it will fail with EINVAL before getting to the bit that
will crashes.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoKVM: x86: Reload pit counters for all channels when restoring state
Andrew Honig [Wed, 18 Nov 2015 22:50:23 +0000 (14:50 -0800)]
KVM: x86: Reload pit counters for all channels when restoring state

[ Upstream commit 0185604c2d82c560dab2f2933a18f797e74ab5a8 ]

Currently if userspace restores the pit counters with a count of 0
on channels 1 or 2 and the guest attempts to read the count on those
channels, then KVM will perform a mod of 0 and crash.  This will ensure
that 0 values are converted to 65536 as per the spec.

This is CVE-2015-7513.

Signed-off-by: Andy Honig <ahonig@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agofuse: break infinite loop in fuse_fill_write_pages()
Roman Gushchin [Mon, 12 Oct 2015 13:33:44 +0000 (16:33 +0300)]
fuse: break infinite loop in fuse_fill_write_pages()

[ Upstream commit 3ca8138f014a913f98e6ef40e939868e1e9ea876 ]

I got a report about unkillable task eating CPU. Further
investigation shows, that the problem is in the fuse_fill_write_pages()
function. If iov's first segment has zero length, we get an infinite
loop, because we never reach iov_iter_advance() call.

Fix this by calling iov_iter_advance() before repeating an attempt to
copy data from userspace.

A similar problem is described in 124d3b7041f ("fix writev regression:
pan hanging unkillable and un-straceable"). If zero-length segmend
is followed by segment with invalid address,
iov_iter_fault_in_readable() checks only first segment (zero-length),
iov_iter_copy_from_user_atomic() skips it, fails at second and
returns zero -> goto again without skipping zero-length segment.

Patch calls iov_iter_advance() before goto again: we'll skip zero-length
segment at second iteraction and iov_iter_fault_in_readable() will detect
invalid address.

Special thanks to Konstantin Khlebnikov, who helped a lot with the commit
description.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Maxim Patlasov <mpatlasov@parallels.com>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Roman Gushchin <klamm@yandex-team.ru>
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Fixes: ea9b9907b82a ("fuse: implement perform_write")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoovl: fix permission checking for setattr
Miklos Szeredi [Fri, 4 Dec 2015 18:18:48 +0000 (19:18 +0100)]
ovl: fix permission checking for setattr

[ Upstream commit acff81ec2c79492b180fade3c2894425cd35a545 ]

[Al Viro] The bug is in being too enthusiastic about optimizing ->setattr()
away - instead of "copy verbatim with metadata" + "chmod/chown/utimes"
(with the former being always safe and the latter failing in case of
insufficient permissions) it tries to combine these two.  Note that copyup
itself will have to do ->setattr() anyway; _that_ is where the elevated
capabilities are right.  Having these two ->setattr() (one to set verbatim
copy of metadata, another to do what overlayfs ->setattr() had been asked
to do in the first place) combined is where it breaks.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoMIPS: smp.c: Fix uninitialised temp_foreign_map
James Hogan [Fri, 4 Mar 2016 10:10:51 +0000 (10:10 +0000)]
MIPS: smp.c: Fix uninitialised temp_foreign_map

[ Upstream commit d825c06bfe8b885b797f917ad47365d0e9c21fbb ]

When calculate_cpu_foreign_map() recalculates the cpu_foreign_map
cpumask it uses the local variable temp_foreign_map without initialising
it to zero. Since the calculation only ever sets bits in this cpumask
any existing bits at that memory location will remain set and find their
way into cpu_foreign_map too. This could potentially lead to cache
operations suboptimally doing smp calls to multiple VPEs in the same
core, even though the VPEs share primary caches.

Therefore initialise temp_foreign_map using cpumask_clear() before use.

Fixes: cccf34e9411c ("MIPS: c-r4k: Fix cache flushing for MT cores")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12759/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agopowerpc: Fix dedotify for binutils >= 2.26
Andreas Schwab [Fri, 5 Feb 2016 18:50:03 +0000 (19:50 +0100)]
powerpc: Fix dedotify for binutils >= 2.26

[ Upstream commit f15838e9cac8f78f0cc506529bb9d3b9fa589c1f ]

Since binutils 2.26 BFD is doing suffix merging on STRTAB sections.  But
dedotify modifies the symbol names in place, which can also modify
unrelated symbols with a name that matches a suffix of a dotted name.  To
remove the leading dot of a symbol name we can just increment the pointer
into the STRTAB section instead.

Backport to all stables to avoid breakage when people update their
binutils - mpe.

Cc: stable@vger.kernel.org
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoRevert "drm/radeon: call hpd_irq_event on resume"
Linus Torvalds [Mon, 7 Mar 2016 21:15:09 +0000 (13:15 -0800)]
Revert "drm/radeon: call hpd_irq_event on resume"

[ Upstream commit 256faedcfd646161477d47a1a78c32a562d2e845 ]

This reverts commit dbb17a21c131eca94eb31136eee9a7fe5aff00d9.

It turns out that commit can cause problems for systems with multiple
GPUs, and causes X to hang on at least a HP Pavilion dv7 with hybrid
graphics.

This got noticed originally in 4.4.4, where this patch had already
gotten back-ported, but 4.5-rc7 was verified to have the same problem.

Alexander Deucher says:
 "It looks like you have a muxed system so I suspect what's happening is
  that one of the display is being reported as connected for both the
  IGP and the dGPU and then the desktop environment gets confused or
  there some sort problem in the detect functions since the mux is not
  switched to the dGPU.  I don't see an easy fix unless Dave has any
  ideas.  I'd say just revert for now"

Reported-by: Jörg-Volker Peetz <jvpeetz@web.de>
Acked-by: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: stable@kernel.org # wherever dbb17a21c131 got back-ported
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoarm64: account for sparsemem section alignment when choosing vmemmap offset
Ard Biesheuvel [Tue, 8 Mar 2016 14:09:29 +0000 (21:09 +0700)]
arm64: account for sparsemem section alignment when choosing vmemmap offset

[ Upstream commit 36e5cd6b897e17d03008f81e075625d8e43e52d0 ]

Commit dfd55ad85e4a ("arm64: vmemmap: use virtual projection of linear
region") fixed an issue where the struct page array would overflow into the
adjacent virtual memory region if system RAM was placed so high up in
physical memory that its addresses were not representable in the build time
configured virtual address size.

However, the fix failed to take into account that the vmemmap region needs
to be relatively aligned with respect to the sparsemem section size, so that
a sequence of page structs corresponding with a sparsemem section in the
linear region appears naturally aligned in the vmemmap region.

So round up vmemmap to sparsemem section size. Since this essentially moves
the projection of the linear region up in memory, also revert the reduction
of the size of the vmemmap region.

Cc: <stable@vger.kernel.org>
Fixes: dfd55ad85e4a ("arm64: vmemmap: use virtual projection of linear region")
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: David Daney <david.daney@cavium.com>
Tested-by: Robert Richter <rrichter@cavium.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agomodules: fix longstanding /proc/kallsyms vs module insertion race.
Rusty Russell [Wed, 3 Feb 2016 06:25:26 +0000 (16:55 +1030)]
modules: fix longstanding /proc/kallsyms vs module insertion race.

[ Upstream commit 8244062ef1e54502ef55f54cced659913f244c3e ]

For CONFIG_KALLSYMS, we keep two symbol tables and two string tables.
There's one full copy, marked SHF_ALLOC and laid out at the end of the
module's init section.  There's also a cut-down version that only
contains core symbols and strings, and lives in the module's core
section.

After module init (and before we free the module memory), we switch
the mod->symtab, mod->num_symtab and mod->strtab to point to the core
versions.  We do this under the module_mutex.

However, kallsyms doesn't take the module_mutex: it uses
preempt_disable() and rcu tricks to walk through the modules, because
it's used in the oops path.  It's also used in /proc/kallsyms.
There's nothing atomic about the change of these variables, so we can
get the old (larger!) num_symtab and the new symtab pointer; in fact
this is what I saw when trying to reproduce.

By grouping these variables together, we can use a
carefully-dereferenced pointer to ensure we always get one or the
other (the free of the module init section is already done in an RCU
callback, so that's safe).  We allocate the init one at the end of the
module init section, and keep the core one inside the struct module
itself (it could also have been allocated at the end of the module
core, but that's probably overkill).

Reported-by: Weilong Chen <chenweilong@huawei.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=111541
Cc: stable@kernel.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoarm64: vmemmap: use virtual projection of linear region
Ard Biesheuvel [Fri, 26 Feb 2016 16:57:13 +0000 (17:57 +0100)]
arm64: vmemmap: use virtual projection of linear region

[ Upstream commit dfd55ad85e4a7fbaa82df12467515ac3c81e8a3e ]

Commit dd006da21646 ("arm64: mm: increase VA range of identity map") made
some changes to the memory mapping code to allow physical memory to reside
at an offset that exceeds the size of the virtual mapping.

However, since the size of the vmemmap area is proportional to the size of
the VA area, but it is populated relative to the physical space, we may
end up with the struct page array being mapped outside of the vmemmap
region. For instance, on my Seattle A0 box, I can see the following output
in the dmesg log.

   vmemmap : 0xffffffbdc0000000 - 0xffffffbfc0000000   (     8 GB maximum)
             0xffffffbfc0000000 - 0xffffffbfd0000000   (   256 MB actual)

We can fix this by deciding that the vmemmap region is not a projection of
the physical space, but of the virtual space above PAGE_OFFSET, i.e., the
linear region. This way, we are guaranteed that the vmemmap region is of
sufficient size, and we can even reduce the size by half.

Cc: <stable@vger.kernel.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agobtrfs: async-thread: Fix a use-after-free error for trace
Qu Wenruo [Fri, 22 Jan 2016 01:28:38 +0000 (09:28 +0800)]
btrfs: async-thread: Fix a use-after-free error for trace

[ Upstream commit 0a95b851370b84a4b9d92ee6d1fa0926901d0454 ]

Parameter of trace_btrfs_work_queued() can be freed in its workqueue.
So no one use use that pointer after queue_work().

Fix the user-after-free bug by move the trace line before queue_work().

Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agobtrfs: Fix no_space in write and rm loop
Zhao Lei [Tue, 1 Dec 2015 10:39:40 +0000 (18:39 +0800)]
btrfs: Fix no_space in write and rm loop

[ Upstream commit 08acfd9dd845dc052c5eae33e6c3976338070069 ]

commit e1746e8381cd2af421f75557b5cae3604fc18b35 upstream.

I see no_space in v4.4-rc1 again in xfstests generic/102.
It happened randomly in some node only.
(one of 4 phy-node, and a kvm with non-virtio block driver)

By bisect, we can found the first-bad is:
 commit bdced438acd8 ("block: setup bi_phys_segments after splitting")'
But above patch only triggered the bug by making bio operation
faster(or slower).

Main reason is in our space_allocating code, we need to commit
page writeback before wait it complish, this patch fixed above
bug.

BTW, there is another reason for generic/102 fail, caused by
disable default mixed-blockgroup, I'll fix it in xfstests.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agobtrfs: wait for delayed iputs on no space
Zhao Lei [Thu, 9 Apr 2015 04:34:43 +0000 (12:34 +0800)]
btrfs: wait for delayed iputs on no space

[ Upstream commit 9a4e7276d39071576d369e607d7accb84b41d0b4 ]

btrfs will report no_space when we run following write and delete
file loop:
 # FILE_SIZE_M=[ 75% of fs space ]
 # DEV=[ some dev ]
 # MNT=[ some dir ]
 #
 # mkfs.btrfs -f "$DEV"
 # mount -o nodatacow "$DEV" "$MNT"
 # for ((i = 0; i < 100; i++)); do dd if=/dev/zero of="$MNT"/file0 bs=1M count="$FILE_SIZE_M"; rm -f "$MNT"/file0; done
 #

Reason:
 iput() and evict() is run after write pages to block device, if
 write pages work is not finished before next write, the "rm"ed space
 is not freed, and caused above bug.

Fix:
 We can add "-o flushoncommit" mount option to avoid above bug, but
 it have performance problem. Actually, we can to wait for on-the-fly
 writes only when no-space happened, it is which this patch do.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agosecurity: let security modules use PTRACE_MODE_* with bitmasks
Jann Horn [Wed, 20 Jan 2016 23:00:01 +0000 (15:00 -0800)]
security: let security modules use PTRACE_MODE_* with bitmasks

[ Upstream commit 3dfb7d8cdbc7ea0c2970450e60818bb3eefbad69 ]

It looks like smack and yama weren't aware that the ptrace mode
can have flags ORed into it - PTRACE_MODE_NOAUDIT until now, but
only for /proc/$pid/stat, and with the PTRACE_MODE_*CREDS patch,
all modes have flags ORed into them.

Signed-off-by: Jann Horn <jann@thejh.net>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: "Serge E. Hallyn" <serge.hallyn@ubuntu.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agox86/entry/compat: Add missing CLAC to entry_INT80_32
Andy Lutomirski [Wed, 24 Feb 2016 20:18:49 +0000 (12:18 -0800)]
x86/entry/compat: Add missing CLAC to entry_INT80_32

[ Upstream commit 3d44d51bd339766f0178f0cf2e8d048b4a4872aa ]

This doesn't seem to fix a regression -- I don't think the CLAC was
ever there.

I double-checked in a debugger: entries through the int80 gate do
not automatically clear AC.

Stable maintainers: I can provide a backport to 4.3 and earlier if
needed.  This needs to be backported all the way to 3.10.

Reported-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org> # v3.10 and later
Fixes: 63bcff2a307b ("x86, smap: Add STAC and CLAC instructions to control user space access")
Link: http://lkml.kernel.org/r/b02b7e71ae54074be01fc171cbd4b72517055c0e.1456345086.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agokernel/resource.c: fix muxed resource handling in __request_region()
Simon Guinot [Wed, 9 Sep 2015 22:15:18 +0000 (00:15 +0200)]
kernel/resource.c: fix muxed resource handling in __request_region()

[ Upstream commit 59ceeaaf355fa0fb16558ef7c24413c804932ada ]

In __request_region, if a conflict with a BUSY and MUXED resource is
detected, then the caller goes to sleep and waits for the resource to be
released.  A pointer on the conflicting resource is kept.  At wake-up
this pointer is used as a parent to retry to request the region.

A first problem is that this pointer might well be invalid (if for
example the conflicting resource have already been freed).  Another
problem is that the next call to __request_region() fails to detect a
remaining conflict.  The previously conflicting resource is passed as a
parameter and __request_region() will look for a conflict among the
children of this resource and not at the resource itself.  It is likely
to succeed anyway, even if there is still a conflict.

Instead, the parent of the conflicting resource should be passed to
__request_region().

As a fix, this patch doesn't update the parent resource pointer in the
case we have to wait for a muxed region right after.

Reported-and-tested-by: Vincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: Simon Guinot <simon.guinot@sequanux.org>
Tested-by: Vincent Donnefort <vdonnefort@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoACPI: Revert "ACPI / video: Add Dell Inspiron 5737 to the blacklist"
Hans de Goede [Fri, 22 Jan 2016 10:41:05 +0000 (11:41 +0100)]
ACPI: Revert "ACPI / video: Add Dell Inspiron 5737 to the blacklist"

[ Upstream commit b186b4dcb79b1914c3dadb27ac72dafaa4267998 ]

The quirk to get "acpi_backlight=vendor" behavior by default on the
Dell Inspiron 5737 was added before we started doing
"acpi_backlight=native" by default on Win8 ready machines.

Since we now avoid using acpi-video as backlight driver on these machines
by default (using the native driver instead) we no longer need this quirk.

Moreover the vendor driver does not work after a suspend/resume where
as the native driver does.

This reverts commit 08a56226d847 (ACPI / video: Add Dell Inspiron 5737
to the blacklist).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=111061
Cc: 3.19+ <stable@vger.kernel.org> # 3.19+
Reported-and-tested-by: erusan@gmail.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agodrm/dp/mst: deallocate payload on port destruction
Mykola Lysenko [Wed, 27 Jan 2016 14:39:36 +0000 (09:39 -0500)]
drm/dp/mst: deallocate payload on port destruction

[ Upstream commit 91a25e463130c8e19bdb42f2d827836c7937992e ]

This is needed to properly deallocate port payload
after downstream branch get unplugged.

In order to do this unplugged MST topology should
be preserved, to find first alive port on path to
unplugged MST topology, and send payload deallocation
request to branch device of found port.

For this mstb and port kref's are used in reversed
order to track when port and branch memory could be
freed.

Added additional functions to find appropriate mstb
as described above.

Signed-off-by: Mykola Lysenko <Mykola.Lysenko@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agodrm/dp/mst: Reverse order of MST enable and clearing VC payload table.
Andrey Grodzovsky [Fri, 22 Jan 2016 22:07:29 +0000 (17:07 -0500)]
drm/dp/mst: Reverse order of MST enable and clearing VC payload table.

[ Upstream commit c175cd16df272119534058f28cbd5eeac6ff2d24 ]

On DELL U3014 if you clear the table before enabling MST it sometimes
hangs the receiver.

Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agodrm/dp/mst: move GUID storage from mgr, port to only mst branch
Hersen Wu [Fri, 22 Jan 2016 22:07:28 +0000 (17:07 -0500)]
drm/dp/mst: move GUID storage from mgr, port to only mst branch

[ Upstream commit 5e93b8208d3c419b515fb75e2601931c027e12ab ]

Previous implementation does not handle case below: boot up one MST branch
to DP connector of ASIC. After boot up, hot plug 2nd MST branch to DP output
of 1st MST, GUID is not created for 2nd MST branch. When downstream port of
2nd MST branch send upstream request, it fails because 2nd MST branch GUID
is not available.

New Implementation: only create GUID for MST branch and save it within Branch.

Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoirqchip/omap-intc: Add support for spurious irq handling
Sekhar Nori [Tue, 15 Dec 2015 14:26:12 +0000 (19:56 +0530)]
irqchip/omap-intc: Add support for spurious irq handling

[ Upstream commit d3b421cd07e4c0d4d6c0bbd55ca169c054fc081d ]

Under some conditions, irq sorting procedure used by INTC can go wrong
resulting in a spurious irq getting reported.

If this condition is not handled, it results in endless stream of:

    unexpected IRQ trap at vector 00

messages from ack_bad_irq()

Handle the spurious interrupt condition in omap-intc driver to prevent this.

Measurements using kernel function profiler on AM335x EVM running at 720MHz
show that after this patch omap_intc_handle_irq() takes about 37.4us against
34us before this patch.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/9c78a6db02ac55f7af7371b417b6e414d2c3095b.1450188128.git.nsekhar@ti.com
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoirqchip: omap-intc: Improve IRQ handler
Felipe Balbi [Fri, 2 Jan 2015 22:18:54 +0000 (16:18 -0600)]
irqchip: omap-intc: Improve IRQ handler

[ Upstream commit 6ed3464897cc825a75218653c710d673282dfcf8 ]

As it turns out the current IRQ number will *always* be available from
SIR register which renders the reads of PENDING registers as plain
unnecessary overhead.

In order to catch any situation where SIR reads as zero, we're adding
a WARN() to turn it into a very verbose error and users actually
report it.

With this patch average running time of omap_intc_handle_irq() reduced
from about 28.5us to 19.8us as measured by the kernel function
profiler.

Tested with BeagleBoneBlack Rev A5C.

Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Cc: Linux ARM Kernel Mailing List <linux-arm-kernel@lists.infradead.org>
Link: http://lkml.kernel.org/r/20150720204910.GH5394@saruman.tx.rr.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years ago[media] si2157: return -EINVAL if firmware blob is too big
Laura Abbott [Mon, 5 Oct 2015 22:33:29 +0000 (19:33 -0300)]
[media] si2157: return -EINVAL if firmware blob is too big

[ Upstream commit d2cc2f0b35465951eaaf0387fd55e29835ed7ea6 ]

A previous patch added a check if the firmware is too big, but it didn't
set the return error code with the right value.

[mchehab@osg.samsung.com: I ended by applying a v1 of Laura's patch, without
 the proper return code. This patch contains the difference between v2 and v1 of
 the Laura's "si2157: Bounds check firmware" patch]
Cc: stable@kernel.org
Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Reviewed-by: Olli Salonen <olli.salonen@iki.fi>
Tested-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agobtrfs: initialize the seq counter in struct btrfs_device
Sebastian Andrzej Siewior [Fri, 15 Jan 2016 13:37:15 +0000 (14:37 +0100)]
btrfs: initialize the seq counter in struct btrfs_device

[ Upstream commit 546bed631203344611f42b2af1d224d2eedb4e6b ]

I managed to trigger this:
| INFO: trying to register non-static key.
| the code is fine but needs lockdep annotation.
| turning off the locking correctness validator.
| CPU: 1 PID: 781 Comm: systemd-gpt-aut Not tainted 4.4.0-rt2+ #14
| Hardware name: ARM-Versatile Express
| [<80307cec>] (dump_stack)
| [<80070e98>] (__lock_acquire)
| [<8007184c>] (lock_acquire)
| [<80287800>] (btrfs_ioctl)
| [<8012a8d4>] (do_vfs_ioctl)
| [<8012ac14>] (SyS_ioctl)

so I think that btrfs_device_data_ordered_init() is not invoked behind
a macro somewhere.

Fixes: 7cc8e58d53cd ("Btrfs: fix unprotected device's variants on 32bits machine")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoBtrfs: Initialize btrfs_root->highest_objectid when loading tree root and subvolume...
Chandan Rajendra [Thu, 7 Jan 2016 13:26:59 +0000 (18:56 +0530)]
Btrfs: Initialize btrfs_root->highest_objectid when loading tree root and subvolume roots

[ Upstream commit f32e48e925964c4f8ab917850788a87e1cef3bad ]

The following call trace is seen when btrfs/031 test is executed in a loop,

[  158.661848] ------------[ cut here ]------------
[  158.662634] WARNING: CPU: 2 PID: 890 at /home/chandan/repos/linux/fs/btrfs/ioctl.c:558 create_subvol+0x3d1/0x6ea()
[  158.664102] BTRFS: Transaction aborted (error -2)
[  158.664774] Modules linked in:
[  158.665266] CPU: 2 PID: 890 Comm: btrfs Not tainted 4.4.0-rc6-g511711a #2
[  158.666251] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[  158.667392]  ffffffff81c0a6b0 ffff8806c7c4f8e8 ffffffff81431fc8 ffff8806c7c4f930
[  158.668515]  ffff8806c7c4f920 ffffffff81051aa1 ffff880c85aff000 ffff8800bb44d000
[  158.669647]  ffff8808863b5c98 0000000000000000 00000000fffffffe ffff8806c7c4f980
[  158.670769] Call Trace:
[  158.671153]  [<ffffffff81431fc8>] dump_stack+0x44/0x5c
[  158.671884]  [<ffffffff81051aa1>] warn_slowpath_common+0x81/0xc0
[  158.672769]  [<ffffffff81051b27>] warn_slowpath_fmt+0x47/0x50
[  158.673620]  [<ffffffff813bc98d>] create_subvol+0x3d1/0x6ea
[  158.674440]  [<ffffffff813777c9>] btrfs_mksubvol.isra.30+0x369/0x520
[  158.675376]  [<ffffffff8108a4aa>] ? percpu_down_read+0x1a/0x50
[  158.676235]  [<ffffffff81377a81>] btrfs_ioctl_snap_create_transid+0x101/0x180
[  158.677268]  [<ffffffff81377b52>] btrfs_ioctl_snap_create+0x52/0x70
[  158.678183]  [<ffffffff8137afb4>] btrfs_ioctl+0x474/0x2f90
[  158.678975]  [<ffffffff81144b8e>] ? vma_merge+0xee/0x300
[  158.679751]  [<ffffffff8115be31>] ? alloc_pages_vma+0x91/0x170
[  158.680599]  [<ffffffff81123f62>] ? lru_cache_add_active_or_unevictable+0x22/0x70
[  158.681686]  [<ffffffff813d99cf>] ? selinux_file_ioctl+0xff/0x1d0
[  158.682581]  [<ffffffff8117b791>] do_vfs_ioctl+0x2c1/0x490
[  158.683399]  [<ffffffff813d3cde>] ? security_file_ioctl+0x3e/0x60
[  158.684297]  [<ffffffff8117b9d4>] SyS_ioctl+0x74/0x80
[  158.685051]  [<ffffffff819b2bd7>] entry_SYSCALL_64_fastpath+0x12/0x6a
[  158.685958] ---[ end trace 4b63312de5a2cb76 ]---
[  158.686647] BTRFS: error (device loop0) in create_subvol:558: errno=-2 No such entry
[  158.709508] BTRFS info (device loop0): forced readonly
[  158.737113] BTRFS info (device loop0): disk space caching is enabled
[  158.738096] BTRFS error (device loop0): Remounting read-write after error is not allowed
[  158.851303] BTRFS error (device loop0): cleaner transaction attach returned -30

This occurs because,

Mount filesystem
Create subvol with ID 257
Unmount filesystem
Mount filesystem
Delete subvol with ID 257
  btrfs_drop_snapshot()
    Add root corresponding to subvol 257 into
    btrfs_transaction->dropped_roots list
Create new subvol (i.e. create_subvol())
  257 is returned as the next free objectid
  btrfs_read_fs_root_no_name()
    Finds the btrfs_root instance corresponding to the old subvol with ID 257
    in btrfs_fs_info->fs_roots_radix.
    Returns error since btrfs_root_item->refs has the value of 0.

To fix the issue the commit initializes tree root's and subvolume root's
highest_objectid when loading the roots from disk.

Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoBtrfs: fix transaction handle leak on failure to create hard link
Filipe Manana [Tue, 5 Jan 2016 16:24:05 +0000 (16:24 +0000)]
Btrfs: fix transaction handle leak on failure to create hard link

[ Upstream commit 271dba4521aed0c37c063548f876b49f5cd64b2e ]

If we failed to create a hard link we were not always releasing the
the transaction handle we got before, resulting in a memory leak and
preventing any other tasks from being able to commit the current
transaction.
Fix this by always releasing our transaction handle.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoBtrfs: fix number of transaction units required to create symlink
Filipe Manana [Thu, 31 Dec 2015 18:16:29 +0000 (18:16 +0000)]
Btrfs: fix number of transaction units required to create symlink

[ Upstream commit 9269d12b2d57d9e3d13036bb750762d1110d425c ]

We weren't accounting for the insertion of an inline extent item for the
symlink inode nor that we need to update the parent inode item (through
the call to btrfs_add_nondir()). So fix this by including two more
transaction units.

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoBtrfs: send, don't BUG_ON() when an empty symlink is found
Filipe Manana [Thu, 31 Dec 2015 18:07:59 +0000 (18:07 +0000)]
Btrfs: send, don't BUG_ON() when an empty symlink is found

[ Upstream commit a879719b8c90e15c9e7fa7266d5e3c0ca962f9df ]

When a symlink is successfully created it always has an inline extent
containing the source path. However if an error happens when creating
the symlink, we can leave in the subvolume's tree a symlink inode without
any such inline extent item - this happens if after btrfs_symlink() calls
btrfs_end_transaction() and before it calls the inode eviction handler
(through the final iput() call), the transaction gets committed and a
crash happens before the eviction handler gets called, or if a snapshot
of the subvolume is made before the eviction handler gets called. Sadly
we can't just avoid this by making btrfs_symlink() call
btrfs_end_transaction() after it calls the eviction handler, because the
later can commit the current transaction before it removes any items from
the subvolume tree (if it encounters ENOSPC errors while reserving space
for removing all the items).

So make send fail more gracefully, with an -EIO error, and print a
message to dmesg/syslog informing that there's an empty symlink inode,
so that the user can delete the empty symlink or do something else
about it.

Reported-by: Stephen R. van den Berg <srb@cuci.nl>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agobtrfs: statfs: report zero available if metadata are exhausted
David Sterba [Sat, 10 Oct 2015 15:59:53 +0000 (17:59 +0200)]
btrfs: statfs: report zero available if metadata are exhausted

[ Upstream commit ca8a51b3a979d57b082b14eda38602b7f52d81d1 ]

There is one ENOSPC case that's very confusing. There's Available
greater than zero but no file operation succeds (besides removing
files). This happens when the metadata are exhausted and there's no
possibility to allocate another chunk.

In this scenario it's normal that there's still some space in the data
chunk and the calculation in df reflects that in the Avail value.

To at least give some clue about the ENOSPC situation, let statfs report
zero value in Avail, even if there's still data space available.

Current:
  /dev/sdb1             4.0G  3.3G  719M  83% /mnt/test

New:
  /dev/sdb1             4.0G  3.3G     0 100% /mnt/test

We calculate the remaining metadata space minus global reserve. If this
is (supposedly) smaller than zero, there's no space. But this does not
hold in practice, the exhausted state happens where's still some
positive delta. So we apply some guesswork and compare the delta to a 4M
threshold. (Practically observed delta was 2M.)

We probably cannot calculate the exact threshold value because this
depends on the internal reservations requested by various operations, so
some operations that consume a few metadata will succeed even if the
Avail is zero. But this is better than the other way around.

Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoBtrfs: igrab inode in writepage
Josef Bacik [Thu, 22 Oct 2015 19:05:09 +0000 (15:05 -0400)]
Btrfs: igrab inode in writepage

[ Upstream commit be7bd730841e69fe8f70120098596f648cd1f3ff ]

We hit this panic on a few of our boxes this week where we have an
ordered_extent with an NULL inode.  We do an igrab() of the inode in writepages,
but weren't doing it in writepage which can be called directly from the VM on
dirty pages.  If the inode has been unlinked then we could have I_FREEING set
which means igrab() would return NULL and we get this panic.  Fix this by trying
to igrab in btrfs_writepage, and if it returns NULL then just redirty the page
and return AOP_WRITEPAGE_ACTIVATE; so the VM knows it wasn't successful.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoBtrfs: add missing brelse when superblock checksum fails
Anand Jain [Wed, 7 Oct 2015 09:23:23 +0000 (17:23 +0800)]
Btrfs: add missing brelse when superblock checksum fails

[ Upstream commit b2acdddfad13c38a1e8b927d83c3cf321f63601a ]

Looks like oversight, call brelse() when checksum fails. Further down the
code, in the non error path, we do call brelse() and so we don't see
brelse() in the goto error paths.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoiw_cxgb3: Fix incorrectly returning error on success
Hariprasad S [Fri, 11 Dec 2015 08:29:17 +0000 (13:59 +0530)]
iw_cxgb3: Fix incorrectly returning error on success

[ Upstream commit 67f1aee6f45059fd6b0f5b0ecb2c97ad0451f6b3 ]

The cxgb3_*_send() functions return NET_XMIT_ values, which are
positive integers values. So don't treat positive return values
as an error.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agolib/ucs2_string: Correct ucs2 -> utf8 conversion
Jason Andryuk [Fri, 12 Feb 2016 23:13:33 +0000 (23:13 +0000)]
lib/ucs2_string: Correct ucs2 -> utf8 conversion

[ Upstream commit a68075908a37850918ad96b056acc9ac4ce1bd90 ]

The comparisons should be >= since 0x800 and 0x80 require an additional bit
to store.

For the 3 byte case, the existing shift would drop off 2 more bits than
intended.

For the 2 byte case, there should be 5 bits bits in byte 1, and 6 bits in
byte 2.

Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Matthew Garrett <mjg59@coreos.com>
Cc: "Lee, Chun-Yi" <jlee@suse.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoefi: Add pstore variables to the deletion whitelist
Matt Fleming [Mon, 15 Feb 2016 10:34:05 +0000 (10:34 +0000)]
efi: Add pstore variables to the deletion whitelist

[ Upstream commit e246eb568bc4cbbdd8a30a3c11151ff9b7ca7312 ]

Laszlo explains why this is a good idea,

 'This is because the pstore filesystem can be backed by UEFI variables,
  and (for example) a crash might dump the last kilobytes of the dmesg
  into a number of pstore entries, each entry backed by a separate UEFI
  variable in the above GUID namespace, and with a variable name
  according to the above pattern.

  Please see "drivers/firmware/efi/efi-pstore.c".

  While this patch series will not prevent the user from deleting those
  UEFI variables via the pstore filesystem (i.e., deleting a pstore fs
  entry will continue to delete the backing UEFI variable), I think it
  would be nice to preserve the possibility for the sysadmin to delete
  Linux-created UEFI variables that carry portions of the crash log,
  *without* having to mount the pstore filesystem.'

There's also no chance of causing machines to become bricked by
deleting these variables, which is the whole purpose of excluding
things from the whitelist.

Use the LINUX_EFI_CRASH_GUID guid and a wildcard '*' for the match so
that we don't have to update the string in the future if new variable
name formats are created for crash dump variables.

Reported-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Peter Jones <pjones@redhat.com>
Tested-by: Peter Jones <pjones@redhat.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: "Lee, Chun-Yi" <jlee@suse.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoefi: Make efivarfs entries immutable by default
Peter Jones [Mon, 8 Feb 2016 19:48:15 +0000 (14:48 -0500)]
efi: Make efivarfs entries immutable by default

[ Upstream commit ed8b0de5a33d2a2557dce7f9429dca8cb5bc5879 ]

"rm -rf" is bricking some peoples' laptops because of variables being
used to store non-reinitializable firmware driver data that's required
to POST the hardware.

These are 100% bugs, and they need to be fixed, but in the mean time it
shouldn't be easy to *accidentally* brick machines.

We have to have delete working, and picking which variables do and don't
work for deletion is quite intractable, so instead make everything
immutable by default (except for a whitelist), and make tools that
aren't quite so broad-spectrum unset the immutable flag.

Signed-off-by: Peter Jones <pjones@redhat.com>
Tested-by: Lee, Chun-Yi <jlee@suse.com>
Acked-by: Matthew Garrett <mjg59@coreos.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoefi: Make our variable validation list include the guid
Peter Jones [Mon, 8 Feb 2016 19:48:14 +0000 (14:48 -0500)]
efi: Make our variable validation list include the guid

[ Upstream commit 8282f5d9c17fe15a9e658c06e3f343efae1a2a2f ]

All the variables in this list so far are defined to be in the global
namespace in the UEFI spec, so this just further ensures we're
validating the variables we think we are.

Including the guid for entries will become more important in future
patches when we decide whether or not to allow deletion of variables
based on presence in this list.

Signed-off-by: Peter Jones <pjones@redhat.com>
Tested-by: Lee, Chun-Yi <jlee@suse.com>
Acked-by: Matthew Garrett <mjg59@coreos.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoefi: Do variable name validation tests in utf8
Peter Jones [Mon, 8 Feb 2016 19:48:13 +0000 (14:48 -0500)]
efi: Do variable name validation tests in utf8

[ Upstream commit 3dcb1f55dfc7631695e69df4a0d589ce5274bd07 ]

Actually translate from ucs2 to utf8 before doing the test, and then
test against our other utf8 data, instead of fudging it.

Signed-off-by: Peter Jones <pjones@redhat.com>
Acked-by: Matthew Garrett <mjg59@coreos.com>
Tested-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
8 years agoefi: Use ucs2_as_utf8 in efivarfs instead of open coding a bad version
Peter Jones [Mon, 8 Feb 2016 19:48:12 +0000 (14:48 -0500)]
efi: Use ucs2_as_utf8 in efivarfs instead of open coding a bad version

[ Upstream commit e0d64e6a880e64545ad7d55786aa84ab76bac475 ]

Translate EFI's UCS-2 variable names to UTF-8 instead of just assuming
all variable names fit in ASCII.

Signed-off-by: Peter Jones <pjones@redhat.com>
Acked-by: Matthew Garrett <mjg59@coreos.com>
Tested-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>