profile/wearable/platform/kernel/linux-3.18-exynos7270.git
5 years agoInput: xpad - update Xbox One Force Feedback Support
Pierre-Loup A. Griffais [Wed, 9 Dec 2015 21:40:37 +0000 (13:40 -0800)]
Input: xpad - update Xbox One Force Feedback Support

[ Upstream commit 2a6d7527b35cf987260800807e328d167aef22ac ]

There's apparently a serial number woven into both input and output
packets; neglecting to specify a valid serial number causes the controller
to ignore the rumble packets.

The scale of the rumble was also apparently halved in the packets.

The initialization packet had to be changed to allow force feedback to
work.

see https://github.com/paroj/xpad/issues/7 for details.

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - correctly handle concurrent LED and FF requests
Pavel Rojtberg [Wed, 9 Dec 2015 19:57:01 +0000 (11:57 -0800)]
Input: xpad - correctly handle concurrent LED and FF requests

[ Upstream commit 7fc595f4c02636eadaeeecfe7bbc45b57c173004 ]

Track the status of the irq_out URB to prevent submission iof new requests
while current one is active. Failure to do so results in the "URB submitted
while active" warning/stack trace.

Store pending brightness and FF effect in the driver structure and replace
it with the latest requests until the device is ready to process next
request. Alternate serving LED vs FF requests to make sure one does not
starve another. See [1] for discussion. Inspired by patch of Sarah Bessmer
[2].

[1]: http://www.spinics.net/lists/linux-input/msg40708.html
[2]: http://www.spinics.net/lists/linux-input/msg31450.html

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - handle "present" and "gone" correctly
Pierre-Loup A. Griffais [Wed, 9 Dec 2015 19:46:25 +0000 (11:46 -0800)]
Input: xpad - handle "present" and "gone" correctly

[ Upstream commit 09c8b00ae3e16c8d0fd4beb2ca064502a76c0f17 ]

Handle the "a new device is present" message properly by dynamically
creating the input device at this point in time. This means we now do not
"preallocate" all 4 devices when a single wireless base station is seen.
This requires a workqueue as we are in interrupt context when we learn
about this.

Also properly disconnect any devices that we are told are removed.

Signed-off-by: "Pierre-Loup A. Griffais" <pgriffais@valvesoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - remove spurious events of wireless xpad 360 controller
Clement Calmels [Sun, 13 Dec 2015 05:20:11 +0000 (21:20 -0800)]
Input: xpad - remove spurious events of wireless xpad 360 controller

[ Upstream commit 93a017aa2f77291752e637bfd83f2459dba714cb ]

When powering up a wireless xbox 360 controller, some wrong joystick
events are generated. It is annoying because, for example, it makes
unwanted moves in Steam big picture mode's menu.

When my controller is powering up, this packet is received by the
driver:
00000000: 00 0f 00 f0 00 cc ff cf 8b e0 86 6a 68 f0 00 20  ...........jh..
00000010: 13 e3 20 1d 30 03 40 01 50 01 ff ff              .. .0.@.P...

According to xboxdrv userspace driver source code, this packet is only
dumping a serial id and should not be interpreted as joystick events.
This issue can be easily seen with jstest:
$ jstest --event /dev/input/js0

This patch only adds a way to filter out this "serial" packet and as a
result it removes the spurous events.

Signed-off-by: Clement Calmels <clement.calmels@free.fr>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - fix clash of presence handling with LED setting
Pavel Rojtberg [Mon, 19 Oct 2015 07:06:58 +0000 (00:06 -0700)]
Input: xpad - fix clash of presence handling with LED setting

[ Upstream commit fbe6a3114471cccaeaeabfa56937731503ece545 ]

Do not call xpad_identify_controller at init with wireless devices: it
conflicts with the already sent presence packet and will be called by
xpad360w_process_packet as needed anyway.

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - query wireless controller state at init
Pavel Rojtberg [Sat, 10 Oct 2015 16:36:17 +0000 (09:36 -0700)]
Input: xpad - query wireless controller state at init

[ Upstream commit aba54876bb38dde81abead1ed1936eb04fa30ca9 ]

When we initialize the driver/device, we really don't know how many
controllers are connected.  So send a "query presence" command to the
base-station. (Command discovered by Zachary Lund)

Presence packet taken from:

https://github.com/computerquip/xpad5

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - move the input device creation to a new function
Pierre-Loup A. Griffais [Sat, 10 Oct 2015 16:34:17 +0000 (09:34 -0700)]
Input: xpad - move the input device creation to a new function

[ Upstream commit b8154002cbdfde1aed2f86bd27f5e2c7e832cabb ]

To allow us to later create / destroy the input device from the urb
callback, we need to initialize/ deinitialize the input device from a
separate function.  So pull that logic out now to make later patches
more "obvious" as to what they do.

Signed-off-by: "Pierre-Loup A. Griffais" <pgriffais@valvesoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - x360w: report dpad as buttons and axes
Pavel Rojtberg [Sat, 10 Oct 2015 16:33:52 +0000 (09:33 -0700)]
Input: xpad - x360w: report dpad as buttons and axes

[ Upstream commit 5ee8bda943de20017636845a5c8d7069a4a283b8 ]

as discussed here[0], x360w is the only pad that maps dpad_to_button.
This is bad for downstream developers as they have to differ between
x360 and x360w which is not intuitive.

This patch implements the suggested solution of exposing the dpad both
as axes and as buttons. This retains backward compatibility with software
already dealing with the difference while makes new software work as
expected across x360/ x360w pads.

[0] http://www.spinics.net/lists/linux-input/msg34421.html

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - factor out URB submission in xpad_play_effect
Pavel Rojtberg [Sat, 10 Oct 2015 16:32:55 +0000 (09:32 -0700)]
Input: xpad - factor out URB submission in xpad_play_effect

[ Upstream commit 060081529c64cfa9baa2748a4b949159e700da0d ]

Move submission logic to a single point at the end of the function.
This makes it easy to add locking/ queuing code later on.

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - remove needless bulk out URB used for LED setup
Pavel Rojtberg [Wed, 7 Oct 2015 00:07:31 +0000 (17:07 -0700)]
Input: xpad - remove needless bulk out URB used for LED setup

[ Upstream commit a306a65f46acb040d208523592a2d34f67d47a61 ]

This code was probably wrong ever since and is redundant with
xpad_send_led_command. Both try to send a similar command to the xbox360
controller. However xpad_send_led_command correctly uses the pad_nr instead
of bInterfaceNumber to select the led and re-uses the irq_out URB instead
of creating a new one.

Note that this change only affects the two supported wireless controllers.
Tested using the xbox360 wireless controller (PC).

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - use ida() for finding the pad_nr
Pavel Rojtberg [Sat, 10 Oct 2015 17:00:49 +0000 (10:00 -0700)]
Input: xpad - use ida() for finding the pad_nr

[ Upstream commit e3b651745a03810efffd7ebf2a9b5be65fb70ec3 ]

The pad_nr corresponds to the lit up LED on the controller. Therefore there
should be no gaps when enumerating. Currently a LED is only re-assigned
after a controller is re-connected 4 times.

This patch uses ida to track connected pads - this way we can re-assign
freed up pad number immediately.

Consider the following case:
1. pad A is connected and gets pad_nr = 0
2. pad B is connected and gets pad_nr = 1
3. pad A is disconnected
4. pad A is connected again

using ida_simple_get() controller A now correctly gets pad_nr = 0 again.

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - clarify LED enumeration
Pavel Rojtberg [Wed, 7 Oct 2015 00:06:16 +0000 (17:06 -0700)]
Input: xpad - clarify LED enumeration

[ Upstream commit 1f6f02b728eef0d937d5138ae60dbf8fbd045f3e ]

Rename led_no -> pad_nr: the number stored there is not the LED number - it
gets translated later on to a LED number in xpad_identify_controller;

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - fix Razer Atrox Arcade Stick button mapping
Dario Scarpa [Wed, 7 Oct 2015 00:04:36 +0000 (17:04 -0700)]
Input: xpad - fix Razer Atrox Arcade Stick button mapping

[ Upstream commit 470446ecef213b17b2c01df9879102948d77f999 ]

The "Razer Atrox Arcade Stick" features 10 buttons, and two of them (LT/RT)
don't work properly.  Change its definition in xpad_device[] (mapping
field) to fix.

Signed-off-by: Dario Scarpa <dario.scarpa@duskzone.it>
Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - add Covert Forces edition of the Xbox One controller
Erik Lundgren [Wed, 7 Oct 2015 00:04:11 +0000 (17:04 -0700)]
Input: xpad - add Covert Forces edition of the Xbox One controller

[ Upstream commit 39a7a88872df98f0c3c50fe278fd1a1f597afd95 ]

It is identical to the Xbox One controller but has a different product ID.

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - re-send LED command on present event
Pavel Rojtberg [Mon, 22 Jun 2015 21:11:30 +0000 (14:11 -0700)]
Input: xpad - re-send LED command on present event

[ Upstream commit cae705baa40b2c20de8f9bb79ef4bcc6b2418c7c ]

The controller only receives commands when its present. So for the
correct LED to be lit the LED command has to be sent on the present
event.

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - set the LEDs properly on XBox Wireless controllers
Pierre-Loup A. Griffais [Mon, 22 Jun 2015 21:10:36 +0000 (14:10 -0700)]
Input: xpad - set the LEDs properly on XBox Wireless controllers

[ Upstream commit 75b7f05d2798ee3a1cc5bbdd54acd0e318a80396 ]

Based on Patch by Pierre-Loup A. Griffais <pgriffais@valvesoftware.com>:
Add the logic to set the LEDs on XBox Wireless controllers.  Command
sequence found by sniffing the Windows data stream when plugging the
device in.

Updated based on comments on linux-input:
unify codepaths in xpad_send_led_command for wired/ wireless controller.
Also document command values for clarification.
All values tested on Xbox 360 Wireless Controller.

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: xpad - add rumble support for Xbox One controller
Ming-ting Yao Wei [Tue, 14 Apr 2015 23:59:11 +0000 (16:59 -0700)]
Input: xpad - add rumble support for Xbox One controller

[ Upstream commit 0604949ce3b9a59cff419daf706272620a9a0df0 ]

This adds rumble support for Xbox One controller by sending continuous
rumble command. Trigger button rumbling is not yet implemented.

Signed-off-by: Ming-ting Yao Wei <mwei@lxde.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoInput: initialize device counter variables with -1
Aniroop Mathur [Wed, 3 Dec 2014 22:27:42 +0000 (14:27 -0800)]
Input: initialize device counter variables with -1

[ Upstream commit 939ffb1712890ee22146d2dfc24adbc7da6afa84 ]

Let's initialize atomic_t variables keeping track of number of various
devices created so far with -1 in order to avoid extra subtraction
operation.

Signed-off-by: Aniroop Mathur <aniroop.mathur@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoarm64: remove no-op -p linker flag
Greg Hackmann [Tue, 27 Nov 2018 19:15:20 +0000 (11:15 -0800)]
arm64: remove no-op -p linker flag

(commit 1a381d4a0a9a0f999a13faaba22bf6b3fc80dcb9 upstream)

Linking the ARM64 defconfig kernel with LLVM lld fails with the error:

  ld.lld: error: unknown argument: -p
  Makefile:1015: recipe for target 'vmlinux' failed

Without this flag, the ARM64 defconfig kernel successfully links with
lld and boots on Dragonboard 410c.

After digging through binutils source and changelogs, it turns out that
-p is only relevant to ancient binutils installations targeting 32-bit
ARM.  binutils accepts -p for AArch64 too, but it's always been
undocumented and silently ignored.  A comment in
ld/emultempl/aarch64elf.em explains that it's "Only here for backwards
compatibility".

Since this flag is a no-op on ARM64, we can safely drop it.

Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agotmpfs: make lseek(SEEK_DATA/SEK_HOLE) return ENXIO with a negative offset
Yufen Yu [Fri, 16 Nov 2018 23:08:39 +0000 (15:08 -0800)]
tmpfs: make lseek(SEEK_DATA/SEK_HOLE) return ENXIO with a negative offset

[ Upstream commit 1a413646931cb14442065cfc17561e50f5b5bb44 ]

Other filesystems such as ext4, f2fs and ubifs all return ENXIO when
lseek (SEEK_DATA or SEEK_HOLE) requests a negative offset.

man 2 lseek says

:      EINVAL whence  is  not  valid.   Or: the resulting file offset would be
:             negative, or beyond the end of a seekable device.
:
:      ENXIO  whence is SEEK_DATA or SEEK_HOLE, and the file offset is  beyond
:             the end of the file.

Make tmpfs return ENXIO under these circumstances as well.  After this,
tmpfs also passes xfstests's generic/448.

[akpm@linux-foundation.org: rewrite changelog]
Link: http://lkml.kernel.org/r/1540434176-14349-1-git-send-email-yuyufen@huawei.com
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Hugh Dickins <hughd@google.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agopowerpc/numa: Suppress "VPHN is not supported" messages
Satheesh Rajendran [Thu, 8 Nov 2018 05:17:56 +0000 (10:47 +0530)]
powerpc/numa: Suppress "VPHN is not supported" messages

[ Upstream commit 437ccdc8ce629470babdda1a7086e2f477048cbd ]

When VPHN function is not supported and during cpu hotplug event,
kernel prints message 'VPHN function not supported. Disabling
polling...'. Currently it prints on every hotplug event, it floods
dmesg when a KVM guest tries to hotplug huge number of vcpus, let's
just print once and suppress further kernel prints.

Signed-off-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agokdb: Use strscpy with destination buffer size
Prarit Bhargava [Thu, 20 Sep 2018 12:59:14 +0000 (08:59 -0400)]
kdb: Use strscpy with destination buffer size

[ Upstream commit c2b94c72d93d0929f48157eef128c4f9d2e603ce ]

gcc 8.1.0 warns with:

kernel/debug/kdb/kdb_support.c: In function ‘kallsyms_symbol_next’:
kernel/debug/kdb/kdb_support.c:239:4: warning: ‘strncpy’ specified bound depends on the length of the source argument [-Wstringop-overflow=]
     strncpy(prefix_name, name, strlen(name)+1);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/debug/kdb/kdb_support.c:239:31: note: length computed here

Use strscpy() with the destination buffer size, and use ellipses when
displaying truncated symbols.

v2: Use strscpy()

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Jonathan Toppins <jtoppins@redhat.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: kgdb-bugreport@lists.sourceforge.net
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoSUNRPC: Fix a bogus get/put in generic_key_to_expire()
Trond Myklebust [Mon, 12 Nov 2018 21:06:51 +0000 (16:06 -0500)]
SUNRPC: Fix a bogus get/put in generic_key_to_expire()

[ Upstream commit e3d5e573a54dabdc0f9f3cb039d799323372b251 ]

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agocpufreq: imx6q: add return value check for voltage scale
Anson Huang [Mon, 5 Nov 2018 00:59:28 +0000 (00:59 +0000)]
cpufreq: imx6q: add return value check for voltage scale

[ Upstream commit 6ef28a04d1ccf718eee069b72132ce4aa1e52ab9 ]

Add return value check for voltage scale when ARM clock
rate change fail.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agocan: dev: __can_get_echo_skb(): print error message, if trying to echo non existing skb
Marc Kleine-Budde [Wed, 31 Oct 2018 13:15:13 +0000 (14:15 +0100)]
can: dev: __can_get_echo_skb(): print error message, if trying to echo non existing skb

commit 7da11ba5c5066dadc2e96835a6233d56d7b7764a upstream.

Prior to echoing a successfully transmitted CAN frame (by calling
can_get_echo_skb()), CAN drivers have to put the CAN frame (by calling
can_put_echo_skb() in the transmit function). These put and get function
take an index as parameter, which is used to identify the CAN frame.

A driver calling can_get_echo_skb() with a index not pointing to a skb
is a BUG, so add an appropriate error message.

Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agocan: dev: __can_get_echo_skb(): Don't crash the kernel if can_priv::echo_skb is acces...
Marc Kleine-Budde [Wed, 31 Oct 2018 13:05:26 +0000 (14:05 +0100)]
can: dev: __can_get_echo_skb(): Don't crash the kernel if can_priv::echo_skb is accessed out of bounds

commit e7a6994d043a1e31d5b17706a22ce33d2a3e4cdc upstream.

If the "struct can_priv::echo_skb" is accessed out of bounds would lead
to a kernel crash. Better print a sensible warning message instead and
try to recover.

Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agocan: dev: __can_get_echo_skb(): replace struct can_frame by canfd_frame to access...
Marc Kleine-Budde [Wed, 31 Oct 2018 10:08:21 +0000 (11:08 +0100)]
can: dev: __can_get_echo_skb(): replace struct can_frame by canfd_frame to access frame length

commit 200f5c49f7a2cd694436bfc6cb0662b794c96736 upstream.

This patch replaces the use of "struct can_frame::can_dlc" by "struct
canfd_frame::len" to access the frame's length. As it is ensured that
both structures have a compatible memory layout for this member this is
no functional change. Futher, this compatibility is documented in a
comment.

Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agocan: dev: can_get_echo_skb(): factor out non sending code to __can_get_echo_skb()
Marc Kleine-Budde [Wed, 31 Oct 2018 09:37:46 +0000 (10:37 +0100)]
can: dev: can_get_echo_skb(): factor out non sending code to __can_get_echo_skb()

commit a4310fa2f24687888ce80fdb0e88583561a23700 upstream.

This patch factors out all non sending parts of can_get_echo_skb() into
a seperate function __can_get_echo_skb(), so that it can be re-used in
an upcoming patch.

Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodrm/ast: change resolution may cause screen blurred
Y.C. Chen [Wed, 3 Oct 2018 06:57:47 +0000 (14:57 +0800)]
drm/ast: change resolution may cause screen blurred

commit 1a37bd823891568f8721989aed0615835632d81a upstream.

The value of pitches is not correct while calling mode_set.
The issue we found so far on following system:
- Debian8 with XFCE Desktop
- Ubuntu with KDE Desktop
- SUSE15 with KDE Desktop

Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com>
Cc: <stable@vger.kernel.org>
Tested-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodrm/ast: fixed cursor may disappear sometimes
Y.C. Chen [Tue, 30 Oct 2018 03:34:46 +0000 (11:34 +0800)]
drm/ast: fixed cursor may disappear sometimes

commit 7989b9ee8bafe5cc625381dd0c3c4586de27ca26 upstream.

Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agollc: do not use sk_eat_skb()
Eric Dumazet [Mon, 22 Oct 2018 16:24:27 +0000 (09:24 -0700)]
llc: do not use sk_eat_skb()

commit 604d415e2bd642b7e02c80e719e0396b9d4a77a6 upstream.

syzkaller triggered a use-after-free [1], caused by a combination of
skb_get() in llc_conn_state_process() and usage of sk_eat_skb()

sk_eat_skb() is assuming the skb about to be freed is only used by
the current thread. TCP/DCCP stacks enforce this because current
thread holds the socket lock.

llc_conn_state_process() wants to make sure skb does not disappear,
and holds a reference on the skb it manipulates. But as soon as this
skb is added to socket receive queue, another thread can consume it.

This means that llc must use regular skb_unlink() and kfree_skb()
so that both producer and consumer can safely work on the same skb.

[1]
BUG: KASAN: use-after-free in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
BUG: KASAN: use-after-free in refcount_read include/linux/refcount.h:43 [inline]
BUG: KASAN: use-after-free in skb_unref include/linux/skbuff.h:967 [inline]
BUG: KASAN: use-after-free in kfree_skb+0xb7/0x580 net/core/skbuff.c:655
Read of size 4 at addr ffff8801d1f6fba4 by task ksoftirqd/1/18

CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 4.19.0-rc8+ #295
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c4/0x2b6 lib/dump_stack.c:113
 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267
 kasan_check_read+0x11/0x20 mm/kasan/kasan.c:272
 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
 refcount_read include/linux/refcount.h:43 [inline]
 skb_unref include/linux/skbuff.h:967 [inline]
 kfree_skb+0xb7/0x580 net/core/skbuff.c:655
 llc_sap_state_process+0x9b/0x550 net/llc/llc_sap.c:224
 llc_sap_rcv+0x156/0x1f0 net/llc/llc_sap.c:297
 llc_sap_handler+0x65e/0xf80 net/llc/llc_sap.c:438
 llc_rcv+0x79e/0xe20 net/llc/llc_input.c:208
 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4913
 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5023
 process_backlog+0x218/0x6f0 net/core/dev.c:5829
 napi_poll net/core/dev.c:6249 [inline]
 net_rx_action+0x7c5/0x1950 net/core/dev.c:6315
 __do_softirq+0x30c/0xb03 kernel/softirq.c:292
 run_ksoftirqd+0x94/0x100 kernel/softirq.c:653
 smpboot_thread_fn+0x68b/0xa00 kernel/smpboot.c:164
 kthread+0x35a/0x420 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413

Allocated by task 18:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
 kmem_cache_alloc_node+0x144/0x730 mm/slab.c:3644
 __alloc_skb+0x119/0x770 net/core/skbuff.c:193
 alloc_skb include/linux/skbuff.h:995 [inline]
 llc_alloc_frame+0xbc/0x370 net/llc/llc_sap.c:54
 llc_station_ac_send_xid_r net/llc/llc_station.c:52 [inline]
 llc_station_rcv+0x1dc/0x1420 net/llc/llc_station.c:111
 llc_rcv+0xc32/0xe20 net/llc/llc_input.c:220
 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4913
 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5023
 process_backlog+0x218/0x6f0 net/core/dev.c:5829
 napi_poll net/core/dev.c:6249 [inline]
 net_rx_action+0x7c5/0x1950 net/core/dev.c:6315
 __do_softirq+0x30c/0xb03 kernel/softirq.c:292

Freed by task 16383:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kmem_cache_free+0x83/0x290 mm/slab.c:3756
 kfree_skbmem+0x154/0x230 net/core/skbuff.c:582
 __kfree_skb+0x1d/0x20 net/core/skbuff.c:642
 sk_eat_skb include/net/sock.h:2366 [inline]
 llc_ui_recvmsg+0xec2/0x1610 net/llc/af_llc.c:882
 sock_recvmsg_nosec net/socket.c:794 [inline]
 sock_recvmsg+0xd0/0x110 net/socket.c:801
 ___sys_recvmsg+0x2b6/0x680 net/socket.c:2278
 __sys_recvmmsg+0x303/0xb90 net/socket.c:2390
 do_sys_recvmmsg+0x181/0x1a0 net/socket.c:2466
 __do_sys_recvmmsg net/socket.c:2484 [inline]
 __se_sys_recvmmsg net/socket.c:2480 [inline]
 __x64_sys_recvmmsg+0xbe/0x150 net/socket.c:2480
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8801d1f6fac0
 which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 228 bytes inside of
 232-byte region [ffff8801d1f6fac0ffff8801d1f6fba8)
The buggy address belongs to the page:
page:ffffea000747dbc0 count:1 mapcount:0 mapping:ffff8801d9be7680 index:0xffff8801d1f6fe80
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0007346e88 ffffea000705b108 ffff8801d9be7680
raw: ffff8801d1f6fe80 ffff8801d1f6f0c0 000000010000000b 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d1f6fa80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8801d1f6fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8801d1f6fb80: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff8801d1f6fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801d1f6fc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agogfs2: Don't leave s_fs_info pointing to freed memory in init_sbd
Andrew Price [Mon, 8 Oct 2018 12:52:43 +0000 (07:52 -0500)]
gfs2: Don't leave s_fs_info pointing to freed memory in init_sbd

commit 4c62bd9cea7bcf10292f7e4c57a2bca332942697 upstream.

When alloc_percpu() fails, sdp gets freed but sb->s_fs_info still points
to the same address. Move the assignment after that error check so that
s_fs_info can only point to a valid sdp or NULL, which is checked for
later in the error path, in gfs2_kill_super().

Reported-by: syzbot+dcb8b3587445007f5808@syzkaller.appspotmail.com
Signed-off-by: Andrew Price <anprice@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agosctp: clear the transport of some out_chunk_list chunks in sctp_assoc_rm_peer
Xin Long [Mon, 29 Oct 2018 15:10:29 +0000 (23:10 +0800)]
sctp: clear the transport of some out_chunk_list chunks in sctp_assoc_rm_peer

commit df132eff463873e14e019a07f387b4d577d6d1f9 upstream.

If a transport is removed by asconf but there still are some chunks with
this transport queuing on out_chunk_list, later an use-after-free issue
will be caused when accessing this transport from these chunks in
sctp_outq_flush().

This is an old bug, we fix it by clearing the transport of these chunks
in out_chunk_list when removing a transport in sctp_assoc_rm_peer().

Reported-by: syzbot+56a40ceee5fb35932f4d@syzkaller.appspotmail.com
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agobfs: add sanity check at bfs_fill_super()
Tetsuo Handa [Fri, 2 Nov 2018 22:48:42 +0000 (15:48 -0700)]
bfs: add sanity check at bfs_fill_super()

commit 9f2df09a33aa2c76ce6385d382693f98d7f2f07e upstream.

syzbot is reporting too large memory allocation at bfs_fill_super() [1].
Since file system image is corrupted such that bfs_sb->s_start == 0,
bfs_fill_super() is trying to allocate 8MB of continuous memory. Fix
this by adding a sanity check on bfs_sb->s_start, __GFP_NOWARN and
printf().

[1] https://syzkaller.appspot.com/bug?id=16a87c236b951351374a84c8a32f40edbc034e96

Link: http://lkml.kernel.org/r/1525862104-3407-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+71c6b5d68e91149fc8a4@syzkaller.appspotmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Tigran Aivazian <aivazian.tigran@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agov9fs_dir_readdir: fix double-free on p9stat_read error
Dominique Martinet [Mon, 27 Aug 2018 06:12:05 +0000 (15:12 +0900)]
v9fs_dir_readdir: fix double-free on p9stat_read error

commit 81c99089bce693b94b775b6eb888115d2d540086 upstream.

p9stat_read will call p9stat_free on error, we should only free the
struct content on success.

There also is no need to "p9stat_init" st as the read function will
zero the whole struct for us anyway, so clean up the code a bit while
we are here.

Link: http://lkml.kernel.org/r/1535410108-20650-1-git-send-email-asmadeus@codewreck.org
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Reported-by: syzbot+d4252148d198410b864f@syzkaller.appspotmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agousb: core: Fix hub port connection events lost
Dennis Wassenberg [Tue, 13 Nov 2018 13:40:34 +0000 (14:40 +0100)]
usb: core: Fix hub port connection events lost

commit 22454b79e6de05fa61a2a72d00d2eed798abbb75 upstream.

This will clear the USB_PORT_FEAT_C_CONNECTION bit in case of a hub port reset
only if a device is was attached to the hub port before resetting the hub port.

Using a Lenovo T480s attached to the ultra dock it was not possible to detect
some usb-c devices at the dock usb-c ports because the hub_port_reset code
will clear the USB_PORT_FEAT_C_CONNECTION bit after the actual hub port reset.
Using this device combo the USB_PORT_FEAT_C_CONNECTION bit was set between the
actual hub port reset and the clear of the USB_PORT_FEAT_C_CONNECTION bit.
This ends up with clearing the USB_PORT_FEAT_C_CONNECTION bit after the
new device was attached such that it was not detected.

This patch will not clear the USB_PORT_FEAT_C_CONNECTION bit if there is
currently no device attached to the port before the hub port reset.
This will avoid clearing the connection bit for new attached devices.

Signed-off-by: Dennis Wassenberg <dennis.wassenberg@secunet.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoLinux 3.18.127 v3.18.127
Greg Kroah-Hartman [Tue, 27 Nov 2018 15:05:38 +0000 (16:05 +0100)]
Linux 3.18.127

5 years agoHID: uhid: forbid UHID_CREATE under KERNEL_DS or elevated privileges
Eric Biggers [Wed, 14 Nov 2018 21:55:09 +0000 (13:55 -0800)]
HID: uhid: forbid UHID_CREATE under KERNEL_DS or elevated privileges

commit 8c01db7619f07c85c5cd81ec5eb83608b56c88f5 upstream.

When a UHID_CREATE command is written to the uhid char device, a
copy_from_user() is done from a user pointer embedded in the command.
When the address limit is KERNEL_DS, e.g. as is the case during
sys_sendfile(), this can read from kernel memory.  Alternatively,
information can be leaked from a setuid binary that is tricked to write
to the file descriptor.  Therefore, forbid UHID_CREATE in these cases.

No other commands in uhid_char_write() are affected by this bug and
UHID_CREATE is marked as "obsolete", so apply the restriction to
UHID_CREATE only rather than to uhid_char_write() entirely.

Thanks to Dmitry Vyukov for adding uhid definitions to syzkaller and to
Jann Horn for commit 9da3f2b740544 ("x86/fault: BUG() when uaccess
helpers fault on kernel addresses"), allowing this bug to be found.

Reported-by: syzbot+72473edc9bf4eb1c6556@syzkaller.appspotmail.com
Fixes: d365c6cfd337 ("HID: uhid: add UHID_CREATE and UHID_DESTROY events")
Cc: <stable@vger.kernel.org> # v3.6+
Cc: Jann Horn <jannh@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Jann Horn <jannh@google.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agonew helper: uaccess_kernel()
Al Viro [Tue, 21 Mar 2017 01:08:07 +0000 (21:08 -0400)]
new helper: uaccess_kernel()

commit db68ce10c4f0a27c1ff9fa0e789e5c41f8c4ea63 upstream.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[only take the include/linux/uaccess.h portion - gregkh]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoACPI / platform: Add SMB0001 HID to forbidden_id_list
Hans de Goede [Mon, 19 Nov 2018 18:06:01 +0000 (19:06 +0100)]
ACPI / platform: Add SMB0001 HID to forbidden_id_list

commit 2bbb5fa37475d7aa5fa62f34db1623f3da2dfdfa upstream.

Many HP AMD based laptops contain an SMB0001 device like this:

Device (SMBD)
{
    Name (_HID, "SMB0001")  // _HID: Hardware ID
    Name (_CRS, ResourceTemplate ()  // _CRS: Current Resource Settings
    {
        IO (Decode16,
            0x0B20,             // Range Minimum
            0x0B20,             // Range Maximum
            0x20,               // Alignment
            0x20,               // Length
            )
        IRQ (Level, ActiveLow, Shared, )
            {7}
    })
}

The legacy style IRQ resource here causes acpi_dev_get_irqresource() to
be called with legacy=true and this message to show in dmesg:
ACPI: IRQ 7 override to edge, high

This causes issues when later on the AMD0030 GPIO device gets enumerated:

Device (GPIO)
{
    Name (_HID, "AMDI0030")  // _HID: Hardware ID
    Name (_CID, "AMDI0030")  // _CID: Compatible ID
    Name (_UID, Zero)  // _UID: Unique ID
    Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
    {
Name (RBUF, ResourceTemplate ()
{
    Interrupt (ResourceConsumer, Level, ActiveLow, Shared, ,, )
    {
0x00000007,
    }
    Memory32Fixed (ReadWrite,
0xFED81500,         // Address Base
0x00000400,         // Address Length
)
})
Return (RBUF) /* \_SB_.GPIO._CRS.RBUF */
    }
}

Now acpi_dev_get_irqresource() gets called with legacy=false, but because
of the earlier override of the trigger-type acpi_register_gsi() returns
-EBUSY (because we try to register the same interrupt with a different
trigger-type) and we end up setting IORESOURCE_DISABLED in the flags.

The setting of IORESOURCE_DISABLED causes platform_get_irq() to call
acpi_irq_get() which is not implemented on x86 and returns -EINVAL.
resulting in the following in dmesg:

amd_gpio AMDI0030:00: Failed to get gpio IRQ: -22
amd_gpio: probe of AMDI0030:00 failed with error -22

The SMB0001 is a "virtual" device in the sense that the only way the OS
interacts with it is through calling a couple of methods to do SMBus
transfers. As such it is weird that it has IO and IRQ resources at all,
because the driver for it is not expected to ever access the hardware
directly.

The Linux driver for the SMB0001 device directly binds to the acpi_device
through the acpi_bus, so we do not need to instantiate a platform_device
for this ACPI device. This commit adds the SMB0001 HID to the
forbidden_id_list, avoiding the instantiating of a platform_device for it.
Not instantiating a platform_device means we will no longer call
acpi_dev_get_irqresource() for the legacy IRQ resource fixing the probe of
the AMDI0030 device failing.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1644013
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=198715
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=199523
Reported-by: Lukas Kahnert <openproggerfreak@gmail.com>
Tested-by: Marc <suaefar@googlemail.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: misc: appledisplay: add 20" Apple Cinema Display
Mattias Jacobsson [Sun, 21 Oct 2018 09:25:37 +0000 (11:25 +0200)]
USB: misc: appledisplay: add 20" Apple Cinema Display

commit f6501f49199097b99e4e263644d88c90d1ec1060 upstream.

Add another Apple Cinema Display to the list of supported displays

Signed-off-by: Mattias Jacobsson <2pi@mok.nu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomisc: atmel-ssc: Fix section annotation on atmel_ssc_get_driver_data
Nathan Chancellor [Wed, 17 Oct 2018 17:09:02 +0000 (10:09 -0700)]
misc: atmel-ssc: Fix section annotation on atmel_ssc_get_driver_data

commit 7c97301285b62a41d6bceded7d964085fc8cc50f upstream.

After building the kernel with Clang, the following section mismatch
warning appears:

WARNING: vmlinux.o(.text+0x3bf19a6): Section mismatch in reference from
the function ssc_probe() to the function
.init.text:atmel_ssc_get_driver_data()
The function ssc_probe() references
the function __init atmel_ssc_get_driver_data().
This is often because ssc_probe lacks a __init
annotation or the annotation of atmel_ssc_get_driver_data is wrong.

Remove __init from atmel_ssc_get_driver_data to get rid of the mismatch.

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agousb: quirks: Add delay-init quirk for Corsair K70 LUX RGB
Emmanuel Pescosta [Fri, 26 Oct 2018 12:48:09 +0000 (14:48 +0200)]
usb: quirks: Add delay-init quirk for Corsair K70 LUX RGB

commit a77112577667cbda7c6292c52d909636aef31fd9 upstream.

Following on from this patch: https://lkml.org/lkml/2017/11/3/516,
Corsair K70 LUX RGB keyboards also require the DELAY_INIT quirk to
start correctly at boot.

Dmesg output:
usb 1-6: string descriptor 0 read error: -110
usb 1-6: New USB device found, idVendor=1b1c, idProduct=1b33
usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-6: can't set config #1, error -110

Signed-off-by: Emmanuel Pescosta <emmanuelpescosta099@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: quirks: Add no-lpm quirk for Raydium touchscreens
Kai-Heng Feng [Fri, 26 Oct 2018 05:33:15 +0000 (13:33 +0800)]
USB: quirks: Add no-lpm quirk for Raydium touchscreens

commit deefd24228a172d1b27d4a9adbfd2cdacd60ae64 upstream.

Raydium USB touchscreen fails to set config if LPM is enabled:
[    2.030658] usb 1-8: New USB device found, idVendor=2386, idProduct=3119
[    2.030659] usb 1-8: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    2.030660] usb 1-8: Product: Raydium Touch System
[    2.030661] usb 1-8: Manufacturer: Raydium Corporation
[    7.132209] usb 1-8: can't set config #1, error -110

Same behavior can be observed on 2386:3114.

Raydium claims the touchscreen supports LPM under Windows, so I used
Microsoft USB Test Tools (MUTT) [1] to check its LPM status. MUTT shows
that the LPM doesn't work under Windows, either. So let's just disable LPM
for Raydium touchscreens.

[1] https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/usb-test-tools

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agousb: cdc-acm: add entry for Hiro (Conexant) modem
Maarten Jacobs [Mon, 19 Nov 2018 23:18:49 +0000 (23:18 +0000)]
usb: cdc-acm: add entry for Hiro (Conexant) modem

commit 63529eaa6164ef7ab4b907b25ac3648177e5e78f upstream.

The cdc-acm kernel module currently does not support the Hiro (Conexant)
H05228 USB modem. The patch below adds the device specific information:
idVendor 0x0572
idProduct 0x1349

Signed-off-by: Maarten Jacobs <maarten256@outlook.com>
Acked-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agouio: Fix an Oops on load
Dan Carpenter [Fri, 26 Oct 2018 07:19:51 +0000 (10:19 +0300)]
uio: Fix an Oops on load

commit 432798195bbce1f8cd33d1c0284d0538835e25fb upstream.

I was trying to solve a double free but I introduced a more serious
NULL dereference bug.  The problem is that if there is an IRQ which
triggers immediately, then we need "info->uio_dev" but it's not set yet.

This patch puts the original initialization back to how it was and just
sets info->uio_dev to NULL on the error path so it should solve both
the Oops and the double free.

Fixes: f019f07ecf6a ("uio: potential double frees if __uio_register_device() fails")
Reported-by: Mathias Thore <Mathias.Thore@infinera.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Tested-by: Mathias Thore <Mathias.Thore@infinera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomedia: v4l: event: Add subscription to list before calling "add" operation
Sakari Ailus [Mon, 5 Nov 2018 14:35:44 +0000 (09:35 -0500)]
media: v4l: event: Add subscription to list before calling "add" operation

commit 92539d3eda2c090b382699bbb896d4b54e9bdece upstream.

Patch ad608fbcf166 changed how events were subscribed to address an issue
elsewhere. As a side effect of that change, the "add" callback was called
before the event subscription was added to the list of subscribed events,
causing the first event queued by the add callback (and possibly other
events arriving soon afterwards) to be lost.

Fix this by adding the subscription to the list before calling the "add"
callback, and clean up afterwards if that fails.

Fixes: ad608fbcf166 ("media: v4l: event: Prevent freeing event subscriptions while accessed")

Reported-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: stable@vger.kernel.org (for 4.14 and up)
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoRevert "Bluetooth: h5: Fix missing dependency on BT_HCIUART_SERDEV"
Greg Kroah-Hartman [Mon, 26 Nov 2018 07:22:30 +0000 (08:22 +0100)]
Revert "Bluetooth: h5: Fix missing dependency on BT_HCIUART_SERDEV"

This reverts commit 209c27b04ccc679bd7da0b84c2144733ce79c8a3 which is
commit 6c3711ec64fd23a9abc8aaf59a9429569a6282df upstream.

You Ling writes that this config option isn't even in 3.18.y yet, so it
causes a regression.  Revert the patch because of this.

Reported-by: youling 257 <youling257@gmail.com>
Cc: Johan Hedberg <johan.hedberg@intel.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoSUNRPC: drop pointless static qualifier in xdr_get_next_encode_buffer()
YueHaibing [Thu, 8 Nov 2018 02:04:57 +0000 (02:04 +0000)]
SUNRPC: drop pointless static qualifier in xdr_get_next_encode_buffer()

[ Upstream commit 025911a5f4e36955498ed50806ad1b02f0f76288 ]

There is no need to have the '__be32 *p' variable static since new value
always be assigned before use it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoRevert "Revert "drm/i915: Fix mutex->owner inspection race under DEBUG_MUTEXES""
Sasha Levin [Fri, 23 Nov 2018 19:05:17 +0000 (14:05 -0500)]
Revert "Revert "drm/i915: Fix mutex->owner inspection race under DEBUG_MUTEXES""

This reverts commit bc07ee33284ac6e6872d5efad1b321ec0b7b46a4. Which is
upstream commit a50940510e94f5fb65ffd79877a60592d85598a9.

This revert relies on upstream commit a63b03e2d24 ("mutex: Always clear
owner field upon mutex_unlock()") being in the tree, but that commit
should not be backported.

Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agozram: close udev startup race condition as default groups
Minchan Kim [Fri, 23 Nov 2018 06:30:22 +0000 (15:30 +0900)]
zram: close udev startup race condition as default groups

commit fef912bf860e upstream.
commit 98af4d4df889 upstream.

I got a report from Howard Chen that he saw zram and sysfs race(ie,
zram block device file is created but sysfs for it isn't yet)
when he tried to create new zram devices via hotadd knob.

v4.20 kernel fixes it by [1, 2] but it's too large size to merge
into -stable so this patch fixes the problem by registering defualt
group by Greg KH's approach[3].

This patch should be applied to every stable tree [3.16+] currently
existing from kernel.org because the problem was introduced at 2.6.37
by [4].

[1] fef912bf860e, block: genhd: add 'groups' argument to device_add_disk
[2] 98af4d4df889, zram: register default groups with device_add_disk()
[3] http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/
[4] 33863c21e69e9, Staging: zram: Replace ioctls with sysfs interface

Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Hannes Reinecke <hare@suse.com>
Tested-by: Howard Chen <howardsoc@google.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agolib/raid6: Fix arm64 test build
Jeremy Linton [Tue, 6 Nov 2018 00:14:41 +0000 (18:14 -0600)]
lib/raid6: Fix arm64 test build

[ Upstream commit 313a06e636808387822af24c507cba92703568b1 ]

The lib/raid6/test fails to build the neon objects
on arm64 because the correct machine type is 'aarch64'.

Once this is correctly enabled, the neon recovery objects
need to be added to the build.

Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agos390/vdso: add missing FORCE to build targets
Vasily Gorbik [Fri, 19 Oct 2018 13:37:01 +0000 (15:37 +0200)]
s390/vdso: add missing FORCE to build targets

[ Upstream commit b44b136a3773d8a9c7853f8df716bd1483613cbb ]

According to Documentation/kbuild/makefiles.txt all build targets using
if_changed should use FORCE as well. Add missing FORCE to make sure
vdso targets are rebuild properly when not just immediate prerequisites
have changed but also when build command differs.

Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoclk: samsung: exynos5420: Enable PERIS clocks for suspend
Marek Szyprowski [Mon, 24 Sep 2018 11:01:20 +0000 (13:01 +0200)]
clk: samsung: exynos5420: Enable PERIS clocks for suspend

[ Upstream commit b33228029d842269e17bba591609e83ed422005d ]

Ensure that clocks for core SoC modules (including TZPC0..9 modules)
are enabled for suspend/resume cycle. This fixes suspend/resume
support on Exynos5422-based Odroid XU3/XU4 boards.

Suggested-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <snawrocki@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agofs/exofs: fix potential memory leak in mount option parsing
Chengguang Xu [Wed, 13 Jun 2018 04:05:13 +0000 (12:05 +0800)]
fs/exofs: fix potential memory leak in mount option parsing

[ Upstream commit 515f1867addaba49c1c6ac73abfaffbc192c1db4 ]

There are some cases can cause memory leak when parsing
option 'osdname'.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoum: Give start_idle_thread() a return code
Richard Weinberger [Fri, 15 Jun 2018 14:42:56 +0000 (16:42 +0200)]
um: Give start_idle_thread() a return code

[ Upstream commit 7ff1e34bbdc15acab823b1ee4240e94623d50ee8 ]

Fixes:
arch/um/os-Linux/skas/process.c:613:1: warning: control reaches end of
non-void function [-Wreturn-type]

longjmp() never returns but gcc still warns that the end of the function
can be reached.
Add a return code and debug aid to detect this impossible case.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agohfsplus: prevent btree data loss on root split
Ernesto A. Fernández [Tue, 30 Oct 2018 22:06:00 +0000 (15:06 -0700)]
hfsplus: prevent btree data loss on root split

[ Upstream commit 0a3021d4f5295aa073c7bf5c5e4de60a2e292578 ]

Creating, renaming or deleting a file may cause catalog corruption and
data loss.  This bug is randomly triggered by xfstests generic/027, but
here is a faster reproducer:

  truncate -s 50M fs.iso
  mkfs.hfsplus fs.iso
  mount fs.iso /mnt
  i=100
  while [ $i -le 150 ]; do
    touch /mnt/$i &>/dev/null
    ((++i))
  done
  i=100
  while [ $i -le 150 ]; do
    mv /mnt/$i /mnt/$(perl -e "print $i x82") &>/dev/null
    ((++i))
  done
  umount /mnt
  fsck.hfsplus -n fs.iso

The bug is triggered whenever hfs_brec_update_parent() needs to split the
root node.  The height of the btree is not increased, which leaves the new
node orphaned and its records lost.

Link: http://lkml.kernel.org/r/26d882184fc43043a810114258f45277752186c7.1535682461.git.ernesto.mnd.fernandez@gmail.com
Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agohfs: prevent btree data loss on root split
Ernesto A. Fernández [Tue, 30 Oct 2018 22:06:07 +0000 (15:06 -0700)]
hfs: prevent btree data loss on root split

[ Upstream commit d057c036672f33d43a5f7344acbb08cf3a8a0c09 ]

This bug is triggered whenever hfs_brec_update_parent() needs to split
the root node.  The height of the btree is not increased, which leaves
the new node orphaned and its records lost.  It is not possible for this
to happen on a valid hfs filesystem because the index nodes have fixed
length keys.

For reasons I ignore, the hfs module does have support for a number of
hfsplus features.  A corrupt btree header may report variable length
keys and trigger this bug, so it's better to fix it.

Link: http://lkml.kernel.org/r/9750b1415685c4adca10766895f6d5ef12babdb0.1535682463.git.ernesto.mnd.fernandez@gmail.com
Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoreiserfs: propagate errors from fill_with_dentries() properly
Jann Horn [Tue, 30 Oct 2018 22:06:38 +0000 (15:06 -0700)]
reiserfs: propagate errors from fill_with_dentries() properly

[ Upstream commit b10298d56c9623f9b173f19959732d3184b35f4f ]

fill_with_dentries() failed to propagate errors up to
reiserfs_for_each_xattr() properly.  Plumb them through.

Note that reiserfs_for_each_xattr() is only used by
reiserfs_delete_xattrs() and reiserfs_chown_xattrs().  The result of
reiserfs_delete_xattrs() is discarded anyway, the only difference there is
whether a warning is printed to dmesg.  The result of
reiserfs_chown_xattrs() does matter because it can block chowning of the
file to which the xattrs belong; but either way, the resulting state can
have misaligned ownership, so my patch doesn't improve things greatly.

Credit for making me look at this code goes to Al Viro, who pointed out
that the ->actor calling convention is suboptimal and should be changed.

Link: http://lkml.kernel.org/r/20180802163335.83312-1-jannh@google.com
Signed-off-by: Jann Horn <jannh@google.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agonet-gro: reset skb->pkt_type in napi_reuse_skb()
Eric Dumazet [Sun, 18 Nov 2018 05:57:02 +0000 (21:57 -0800)]
net-gro: reset skb->pkt_type in napi_reuse_skb()

[ Upstream commit 33d9a2c72f086cbf1087b2fd2d1a15aa9df14a7f ]

eth_type_trans() assumes initial value for skb->pkt_type
is PACKET_HOST.

This is indeed the value right after a fresh skb allocation.

However, it is possible that GRO merged a packet with a different
value (like PACKET_OTHERHOST in case macvlan is used), so
we need to make sure napi->skb will have pkt_type set back to
PACKET_HOST.

Otherwise, valid packets might be dropped by the stack because
their pkt_type is not PACKET_HOST.

napi_reuse_skb() was added in commit 96e93eab2033 ("gro: Add
internal interfaces for VLAN"), but this bug always has
been there.

Fixes: 96e93eab2033 ("gro: Add internal interfaces for VLAN")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoLinux 3.18.126 v3.18.126
Greg Kroah-Hartman [Thu, 22 Nov 2018 06:32:49 +0000 (07:32 +0100)]
Linux 3.18.126

5 years agohugetlbfs: fix kernel BUG at fs/hugetlbfs/inode.c:444!
Mike Kravetz [Fri, 16 Nov 2018 23:08:04 +0000 (15:08 -0800)]
hugetlbfs: fix kernel BUG at fs/hugetlbfs/inode.c:444!

commit 5e41540c8a0f0e98c337dda8b391e5dda0cde7cf upstream.

This bug has been experienced several times by the Oracle DB team.  The
BUG is in remove_inode_hugepages() as follows:

/*
 * If page is mapped, it was faulted in after being
 * unmapped in caller.  Unmap (again) now after taking
 * the fault mutex.  The mutex will prevent faults
 * until we finish removing the page.
 *
 * This race can only happen in the hole punch case.
 * Getting here in a truncate operation is a bug.
 */
if (unlikely(page_mapped(page))) {
BUG_ON(truncate_op);

In this case, the elevated map count is not the result of a race.
Rather it was incorrectly incremented as the result of a bug in the huge
pmd sharing code.  Consider the following:

 - Process A maps a hugetlbfs file of sufficient size and alignment
   (PUD_SIZE) that a pmd page could be shared.

 - Process B maps the same hugetlbfs file with the same size and
   alignment such that a pmd page is shared.

 - Process B then calls mprotect() to change protections for the mapping
   with the shared pmd. As a result, the pmd is 'unshared'.

 - Process B then calls mprotect() again to chage protections for the
   mapping back to their original value. pmd remains unshared.

 - Process B then forks and process C is created. During the fork
   process, we do dup_mm -> dup_mmap -> copy_page_range to copy page
   tables. Copying page tables for hugetlb mappings is done in the
   routine copy_hugetlb_page_range.

In copy_hugetlb_page_range(), the destination pte is obtained by:

dst_pte = huge_pte_alloc(dst, addr, sz);

If pmd sharing is possible, the returned pointer will be to a pte in an
existing page table.  In the situation above, process C could share with
either process A or process B.  Since process A is first in the list,
the returned pte is a pointer to a pte in process A's page table.

However, the check for pmd sharing in copy_hugetlb_page_range is:

/* If the pagetables are shared don't copy or take references */
if (dst_pte == src_pte)
continue;

Since process C is sharing with process A instead of process B, the
above test fails.  The code in copy_hugetlb_page_range which follows
assumes dst_pte points to a huge_pte_none pte.  It copies the pte entry
from src_pte to dst_pte and increments this map count of the associated
page.  This is how we end up with an elevated map count.

To solve, check the dst_pte entry for huge_pte_none.  If !none, this
implies PMD sharing so do not copy.

Link: http://lkml.kernel.org/r/20181105212315.14125-1-mike.kravetz@oracle.com
Fixes: c5c99429fa57 ("fix hugepages leak due to pagetable page sharing")
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Prakash Sangappa <prakash.sangappa@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoconfigfs: replace strncpy with memcpy
Guenter Roeck [Sun, 1 Jul 2018 20:56:54 +0000 (13:56 -0700)]
configfs: replace strncpy with memcpy

commit 1823342a1f2b47a4e6f5667f67cd28ab6bc4d6cd upstream.

gcc 8.1.0 complains:

fs/configfs/symlink.c:67:3: warning:
'strncpy' output truncated before terminating nul copying as many
bytes from a string as its length
fs/configfs/symlink.c: In function 'configfs_get_link':
fs/configfs/symlink.c:63:13: note: length computed here

Using strncpy() is indeed less than perfect since the length of data to
be copied has already been determined with strlen(). Replace strncpy()
with memcpy() to address the warning and optimize the code a little.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu@cybertrust.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agofuse: fix leaked notify reply
Miklos Szeredi [Fri, 9 Nov 2018 14:52:16 +0000 (15:52 +0100)]
fuse: fix leaked notify reply

commit 7fabaf303458fcabb694999d6fa772cc13d4e217 upstream.

fuse_request_send_notify_reply() may fail if the connection was reset for
some reason (e.g. fs was unmounted).  Don't leak request reference in this
case.  Besides leaking memory, this resulted in fc->num_waiting not being
decremented and hence fuse_wait_aborted() left in a hanging and unkillable
state.

Fixes: 2d45ba381a74 ("fuse: add retrieve request")
Fixes: b8f95e5d13f5 ("fuse: umount should wait for all requests")
Reported-and-tested-by: syzbot+6339eda9cb4ebbc4c37b@syzkaller.appspotmail.com
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org> #v2.6.36
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agosunrpc: correct the computation for page_ptr when truncating
Frank Sorenson [Tue, 30 Oct 2018 20:10:40 +0000 (15:10 -0500)]
sunrpc: correct the computation for page_ptr when truncating

commit 5d7a5bcb67c70cbc904057ef52d3fcfeb24420bb upstream.

When truncating the encode buffer, the page_ptr is getting
advanced, causing the next page to be skipped while encoding.
The page is still included in the response, so the response
contains a page of bogus data.

We need to adjust the page_ptr backwards to ensure we encode
the next page into the correct place.

We saw this triggered when concurrent directory modifications caused
nfsd4_encode_direct_fattr() to return nfserr_noent, and the resulting
call to xdr_truncate_encode() corrupted the READDIR reply.

Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomount: Prevent MNT_DETACH from disconnecting locked mounts
Eric W. Biederman [Thu, 25 Oct 2018 17:05:11 +0000 (12:05 -0500)]
mount: Prevent MNT_DETACH from disconnecting locked mounts

commit 9c8e0a1b683525464a2abe9fb4b54404a50ed2b4 upstream.

Timothy Baldwin <timbaldwin@fastmail.co.uk> wrote:
> As per mount_namespaces(7) unprivileged users should not be able to look under mount points:
>
>   Mounts that come as a single unit from more privileged mount are locked
>   together and may not be separated in a less privileged mount namespace.
>
> However they can:
>
> 1. Create a mount namespace.
> 2. In the mount namespace open a file descriptor to the parent of a mount point.
> 3. Destroy the mount namespace.
> 4. Use the file descriptor to look under the mount point.
>
> I have reproduced this with Linux 4.16.18 and Linux 4.18-rc8.
>
> The setup:
>
> $ sudo sysctl kernel.unprivileged_userns_clone=1
> kernel.unprivileged_userns_clone = 1
> $ mkdir -p A/B/Secret
> $ sudo mount -t tmpfs hide A/B
>
>
> "Secret" is indeed hidden as expected:
>
> $ ls -lR A
> A:
> total 0
> drwxrwxrwt 2 root root 40 Feb 12 21:08 B
>
> A/B:
> total 0
>
>
> The attack revealing "Secret":
>
> $ unshare -Umr sh -c "exec unshare -m ls -lR /proc/self/fd/4/ 4<A"
> /proc/self/fd/4/:
> total 0
> drwxr-xr-x 3 root root 60 Feb 12 21:08 B
>
> /proc/self/fd/4/B:
> total 0
> drwxr-xr-x 2 root root 40 Feb 12 21:08 Secret
>
> /proc/self/fd/4/B/Secret:
> total 0

I tracked this down to put_mnt_ns running passing UMOUNT_SYNC and
disconnecting all of the mounts in a mount namespace.  Fix this by
factoring drop_mounts out of drop_collected_mounts and passing
0 instead of UMOUNT_SYNC.

There are two possible behavior differences that result from this.
- No longer setting UMOUNT_SYNC will no longer set MNT_SYNC_UMOUNT on
  the vfsmounts being unmounted.  This effects the lazy rcu walk by
  kicking the walk out of rcu mode and forcing it to be a non-lazy
  walk.
- No longer disconnecting locked mounts will keep some mounts around
  longer as they stay because the are locked to other mounts.

There are only two users of drop_collected mounts: audit_tree.c and
put_mnt_ns.

In audit_tree.c the mounts are private and there are no rcu lazy walks
only calls to iterate_mounts. So the changes should have no effect
except for a small timing effect as the connected mounts are disconnected.

In put_mnt_ns there may be references from process outside the mount
namespace to the mounts.  So the mounts remaining connected will
be the bug fix that is needed.  That rcu walks are allowed to continue
appears not to be a problem especially as the rcu walk change was about
an implementation detail not about semantics.

Cc: stable@vger.kernel.org
Fixes: 5ff9d8a65ce8 ("vfs: Lock in place mounts from more privileged users")
Reported-by: Timothy Baldwin <timbaldwin@fastmail.co.uk>
Tested-by: Timothy Baldwin <timbaldwin@fastmail.co.uk>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomount: Don't allow copying MNT_UNBINDABLE|MNT_LOCKED mounts
Eric W. Biederman [Thu, 25 Oct 2018 14:04:18 +0000 (09:04 -0500)]
mount: Don't allow copying MNT_UNBINDABLE|MNT_LOCKED mounts

commit df7342b240185d58d3d9665c0bbf0a0f5570ec29 upstream.

Jonathan Calmels from NVIDIA reported that he's able to bypass the
mount visibility security check in place in the Linux kernel by using
a combination of the unbindable property along with the private mount
propagation option to allow a unprivileged user to see a path which
was purposefully hidden by the root user.

Reproducer:
  # Hide a path to all users using a tmpfs
  root@castiana:~# mount -t tmpfs tmpfs /sys/devices/
  root@castiana:~#

  # As an unprivileged user, unshare user namespace and mount namespace
  stgraber@castiana:~$ unshare -U -m -r

  # Confirm the path is still not accessible
  root@castiana:~# ls /sys/devices/

  # Make /sys recursively unbindable and private
  root@castiana:~# mount --make-runbindable /sys
  root@castiana:~# mount --make-private /sys

  # Recursively bind-mount the rest of /sys over to /mnnt
  root@castiana:~# mount --rbind /sys/ /mnt

  # Access our hidden /sys/device as an unprivileged user
  root@castiana:~# ls /mnt/devices/
  breakpoint cpu cstate_core cstate_pkg i915 intel_pt isa kprobe
  LNXSYSTM:00 msr pci0000:00 platform pnp0 power software system
  tracepoint uncore_arb uncore_cbox_0 uncore_cbox_1 uprobe virtual

Solve this by teaching copy_tree to fail if a mount turns out to be
both unbindable and locked.

Cc: stable@vger.kernel.org
Fixes: 5ff9d8a65ce8 ("vfs: Lock in place mounts from more privileged users")
Reported-by: Jonathan Calmels <jcalmels@nvidia.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomount: Retest MNT_LOCKED in do_umount
Eric W. Biederman [Mon, 22 Oct 2018 15:21:38 +0000 (10:21 -0500)]
mount: Retest MNT_LOCKED in do_umount

commit 25d202ed820ee347edec0bf3bf553544556bf64b upstream.

It was recently pointed out that the one instance of testing MNT_LOCKED
outside of the namespace_sem is in ksys_umount.

Fix that by adding a test inside of do_umount with namespace_sem and
the mount_lock held.  As it helps to fail fails the existing test is
maintained with an additional comment pointing out that it may be racy
because the locks are not held.

Cc: stable@vger.kernel.org
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Fixes: 5ff9d8a65ce8 ("vfs: Lock in place mounts from more privileged users")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: fix buffer leak in __ext4_read_dirblock() on error path
Vasily Averin [Thu, 8 Nov 2018 03:36:23 +0000 (22:36 -0500)]
ext4: fix buffer leak in __ext4_read_dirblock() on error path

commit de59fae0043f07de5d25e02ca360f7d57bfa5866 upstream.

Fixes: dc6982ff4db1 ("ext4: refactor code to read directory blocks ...")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 3.9
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: fix buffer leak in ext4_xattr_move_to_block() on error path
Vasily Averin [Wed, 7 Nov 2018 16:10:21 +0000 (11:10 -0500)]
ext4: fix buffer leak in ext4_xattr_move_to_block() on error path

commit 6bdc9977fcdedf47118d2caf7270a19f4b6d8a8f upstream.

Fixes: 3f2571c1f91f ("ext4: factor out xattr moving")
Fixes: 6dd4ee7cab7e ("ext4: Expand extra_inodes space per ...")
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 2.6.23
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: release bs.bh before re-using in ext4_xattr_block_find()
Vasily Averin [Wed, 7 Nov 2018 16:07:01 +0000 (11:07 -0500)]
ext4: release bs.bh before re-using in ext4_xattr_block_find()

commit 45ae932d246f721e6584430017176cbcadfde610 upstream.

bs.bh was taken in previous ext4_xattr_block_find() call,
it should be released before re-using

Fixes: 7e01c8e5420b ("ext3/4: fix uninitialized bs in ...")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 2.6.26
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: fix possible leak of sbi->s_group_desc_leak in error path
Theodore Ts'o [Wed, 7 Nov 2018 15:32:53 +0000 (10:32 -0500)]
ext4: fix possible leak of sbi->s_group_desc_leak in error path

commit 9e463084cdb22e0b56b2dfbc50461020409a5fd3 upstream.

Fixes: bfe0a5f47ada ("ext4: add more mount time checks of the superblock")
Reported-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 4.18
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: avoid possible double brelse() in add_new_gdb() on error path
Theodore Ts'o [Tue, 6 Nov 2018 22:18:17 +0000 (17:18 -0500)]
ext4: avoid possible double brelse() in add_new_gdb() on error path

commit 4f32c38b4662312dd3c5f113d8bdd459887fb773 upstream.

Fixes: b40971426a83 ("ext4: add error checking to calls to ...")
Reported-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 2.6.38
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: fix missing cleanup if ext4_alloc_flex_bg_array() fails while resizing
Vasily Averin [Tue, 6 Nov 2018 21:16:01 +0000 (16:16 -0500)]
ext4: fix missing cleanup if ext4_alloc_flex_bg_array() fails while resizing

commit f348e2241fb73515d65b5d77dd9c174128a7fbf2 upstream.

Fixes: 117fff10d7f1 ("ext4: grow the s_flex_groups array as needed ...")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 3.7
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: avoid buffer leak in ext4_orphan_add() after prior errors
Vasily Averin [Tue, 6 Nov 2018 22:01:36 +0000 (17:01 -0500)]
ext4: avoid buffer leak in ext4_orphan_add() after prior errors

commit feaf264ce7f8d54582e2f66eb82dd9dd124c94f3 upstream.

Fixes: d745a8c20c1f ("ext4: reduce contention on s_orphan_lock")
Fixes: 6e3617e579e0 ("ext4: Handle non empty on-disk orphan link")
Cc: Dmitry Monakhov <dmonakhov@gmail.com>
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 2.6.34
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: fix possible inode leak in the retry loop of ext4_resize_fs()
Vasily Averin [Tue, 6 Nov 2018 21:20:40 +0000 (16:20 -0500)]
ext4: fix possible inode leak in the retry loop of ext4_resize_fs()

commit db6aee62406d9fbb53315fcddd81f1dc271d49fa upstream.

Fixes: 1c6bd7173d66 ("ext4: convert file system to meta_bg if needed ...")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 3.7
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: avoid potential extra brelse in setup_new_flex_group_blocks()
Vasily Averin [Sat, 3 Nov 2018 20:13:17 +0000 (16:13 -0400)]
ext4: avoid potential extra brelse in setup_new_flex_group_blocks()

commit 9e4028935cca3f9ef9b6a90df9da6f1f94853536 upstream.

Currently bh is set to NULL only during first iteration of for cycle,
then this pointer is not cleared after end of using.
Therefore rollback after errors can lead to extra brelse(bh) call,
decrements bh counter and later trigger an unexpected warning in __brelse()

Patch moves brelse() calls in body of cycle to exclude requirement of
brelse() call in rollback.

Fixes: 33afdcc5402d ("ext4: add a function which sets up group blocks ...")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 3.3+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: add missing brelse() add_new_gdb_meta_bg()'s error path
Vasily Averin [Sat, 3 Nov 2018 20:50:08 +0000 (16:50 -0400)]
ext4: add missing brelse() add_new_gdb_meta_bg()'s error path

commit 61a9c11e5e7a0dab5381afa5d9d4dd5ebf18f7a0 upstream.

Fixes: 01f795f9e0d6 ("ext4: add online resizing support for meta_bg ...")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 3.7
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: add missing brelse() in set_flexbg_block_bitmap()'s error path
Vasily Averin [Sat, 3 Nov 2018 20:22:10 +0000 (16:22 -0400)]
ext4: add missing brelse() in set_flexbg_block_bitmap()'s error path

commit cea5794122125bf67559906a0762186cf417099c upstream.

Fixes: 33afdcc5402d ("ext4: add a function which sets up group blocks ...")
Cc: stable@kernel.org # 3.3
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoext4: add missing brelse() update_backups()'s error path
Vasily Averin [Sat, 3 Nov 2018 21:11:19 +0000 (17:11 -0400)]
ext4: add missing brelse() update_backups()'s error path

commit ea0abbb648452cdb6e1734b702b6330a7448fcf8 upstream.

Fixes: ac27a0ec112a ("ext4: initial copy of files from ext3")
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 2.6.19
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoarch/alpha, termios: implement BOTHER, IBSHIFT and termios2
H. Peter Anvin (Intel) [Mon, 22 Oct 2018 16:19:05 +0000 (09:19 -0700)]
arch/alpha, termios: implement BOTHER, IBSHIFT and termios2

commit d0ffb805b729322626639336986bc83fc2e60871 upstream.

Alpha has had c_ispeed and c_ospeed, but still set speeds in c_cflags
using arbitrary flags. Because BOTHER is not defined, the general
Linux code doesn't allow setting arbitrary baud rates, and because
CBAUDEX == 0, we can have an array overrun of the baud_rate[] table in
drivers/tty/tty_baudrate.c if (c_cflags & CBAUD) == 037.

Resolve both problems by #defining BOTHER to 037 on Alpha.

However, userspace still needs to know if setting BOTHER is actually
safe given legacy kernels (does anyone actually care about that on
Alpha anymore?), so enable the TCGETS2/TCSETS*2 ioctls on Alpha, even
though they use the same structure. Define struct termios2 just for
compatibility; it is the exact same structure as struct termios. In a
future patchset, this will be cleaned up so the uapi headers are
usable from libc.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Eugene Syromiatnikov <esyr@redhat.com>
Cc: <linux-alpha@vger.kernel.org>
Cc: <linux-serial@vger.kernel.org>
Cc: Johan Hovold <johan@kernel.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotermios, tty/tty_baudrate.c: fix buffer overrun
H. Peter Anvin [Mon, 22 Oct 2018 16:19:04 +0000 (09:19 -0700)]
termios, tty/tty_baudrate.c: fix buffer overrun

commit 991a25194097006ec1e0d2e0814ff920e59e3465 upstream.

On architectures with CBAUDEX == 0 (Alpha and PowerPC), the code in tty_baudrate.c does
not do any limit checking on the tty_baudrate[] array, and in fact a
buffer overrun is possible on both architectures. Add a limit check to
prevent that situation.

This will be followed by a much bigger cleanup/simplification patch.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Requested-by: Cc: Johan Hovold <johan@kernel.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Eugene Syromiatnikov <esyr@redhat.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomtd: docg3: don't set conflicting BCH_CONST_PARAMS option
Arnd Bergmann [Thu, 11 Oct 2018 11:06:16 +0000 (13:06 +0200)]
mtd: docg3: don't set conflicting BCH_CONST_PARAMS option

commit be2e1c9dcf76886a83fb1c433a316e26d4ca2550 upstream.

I noticed during the creation of another bugfix that the BCH_CONST_PARAMS
option that is set by DOCG3 breaks setting variable parameters for any
other users of the BCH library code.

The only other user we have today is the MTD_NAND software BCH
implementation (most flash controllers use hardware BCH these days
and are not affected). I considered removing BCH_CONST_PARAMS entirely
because of the inherent conflict, but according to the description in
lib/bch.c there is a significant performance benefit in keeping it.

To avoid the immediate problem of the conflict between MTD_NAND_BCH
and DOCG3, this only sets the constant parameters if MTD_NAND_BCH
is disabled, which should fix the problem for all cases that
are affected. This should also work for all stable kernels.

Note that there is only one machine that actually seems to use the
DOCG3 driver (arch/arm/mach-pxa/mioa701.c), so most users should have
the driver disabled, but it almost certainly shows up if we wanted
to test random kernels on machines that use software BCH in MTD.

Fixes: d13d19ece39f ("mtd: docg3: add ECC correction code")
Cc: stable@vger.kernel.org
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoocfs2: fix a misuse a of brelse after failing ocfs2_check_dir_entry
Changwei Ge [Fri, 2 Nov 2018 22:48:15 +0000 (15:48 -0700)]
ocfs2: fix a misuse a of brelse after failing ocfs2_check_dir_entry

commit 29aa30167a0a2e6045a0d6d2e89d8168132333d5 upstream.

Somehow, file system metadata was corrupted, which causes
ocfs2_check_dir_entry() to fail in function ocfs2_dir_foreach_blk_el().

According to the original design intention, if above happens we should
skip the problematic block and continue to retrieve dir entry.  But
there is obviouse misuse of brelse around related code.

After failure of ocfs2_check_dir_entry(), current code just moves to
next position and uses the problematic buffer head again and again
during which the problematic buffer head is released for multiple times.
I suppose, this a serious issue which is long-lived in ocfs2.  This may
cause other file systems which is also used in a the same host insane.

So we should also consider about bakcporting this patch into linux
-stable.

Link: http://lkml.kernel.org/r/HK2PR06MB045211675B43EED794E597B6D56E0@HK2PR06MB0452.apcprd06.prod.outlook.com
Signed-off-by: Changwei Ge <ge.changwei@h3c.com>
Suggested-by: Changkuo Shi <shi.changkuo@h3c.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomach64: fix image corruption due to reading accelerator registers
Mikulas Patocka [Mon, 8 Oct 2018 10:57:35 +0000 (12:57 +0200)]
mach64: fix image corruption due to reading accelerator registers

commit c09bcc91bb94ed91f1391bffcbe294963d605732 upstream.

Reading the registers without waiting for engine idle returns
unpredictable values. These unpredictable values result in display
corruption - if atyfb_imageblit reads the content of DP_PIX_WIDTH with the
bit DP_HOST_TRIPLE_EN set (from previous invocation), the driver would
never ever clear the bit, resulting in display corruption.

We don't want to wait for idle because it would degrade performance, so
this patch modifies the driver so that it never reads accelerator
registers.

HOST_CNTL doesn't have to be read, we can just write it with
HOST_BYTE_ALIGN because no other part of the driver cares if
HOST_BYTE_ALIGN is set.

DP_PIX_WIDTH is written in the functions atyfb_copyarea and atyfb_fillrect
with the default value and in atyfb_imageblit with the value set according
to the source image data.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Ville Syrjälä <syrjala@sci.fi>
Cc: stable@vger.kernel.org
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomach64: fix display corruption on big endian machines
Mikulas Patocka [Mon, 8 Oct 2018 10:57:34 +0000 (12:57 +0200)]
mach64: fix display corruption on big endian machines

commit 3c6c6a7878d00a3ac997a779c5b9861ff25dfcc8 upstream.

The code for manual bit triple is not endian-clean. It builds the variable
"hostdword" using byte accesses, therefore we must read the variable with
"le32_to_cpu".

The patch also enables (hardware or software) bit triple only if the image
is monochrome (image->depth). If we want to blit full-color image, we
shouldn't use the triple code.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Ville Syrjälä <syrjala@sci.fi>
Cc: stable@vger.kernel.org
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agolibceph: bump CEPH_MSG_MAX_DATA_LEN
Ilya Dryomov [Wed, 26 Sep 2018 16:03:16 +0000 (18:03 +0200)]
libceph: bump CEPH_MSG_MAX_DATA_LEN

commit 94e6992bb560be8bffb47f287194adf070b57695 upstream.

If the read is large enough, we end up spinning in the messenger:

  libceph: osd0 192.168.122.1:6801 io error
  libceph: osd0 192.168.122.1:6801 io error
  libceph: osd0 192.168.122.1:6801 io error

This is a receive side limit, so only reads were affected.

Cc: stable@vger.kernel.org
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoxtensa: fix boot parameters address translation
Max Filippov [Wed, 14 Nov 2018 07:46:42 +0000 (23:46 -0800)]
xtensa: fix boot parameters address translation

commit 40dc948f234b73497c3278875eb08a01d5854d3f upstream.

The bootloader may pass physical address of the boot parameters structure
to the MMUv3 kernel in the register a2. Code in the _SetupMMU block in
the arch/xtensa/kernel/head.S is supposed to map that physical address to
the virtual address in the configured virtual memory layout.

This code haven't been updated when additional 256+256 and 512+512
memory layouts were introduced and it may produce wrong addresses when
used with these layouts.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agocdrom: fix improper type cast, which can leat to information leak.
Young_X [Wed, 3 Oct 2018 12:54:29 +0000 (12:54 +0000)]
cdrom: fix improper type cast, which can leat to information leak.

commit e4f3aa2e1e67bb48dfbaaf1cad59013d5a5bc276 upstream.

There is another cast from unsigned long to int which causes
a bounds check to fail with specially crafted input. The value is
then used as an index in the slot array in cdrom_slot_status().

This issue is similar to CVE-2018-16658 and CVE-2018-10940.

Signed-off-by: Young_X <YangX92@hotmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years ago9p: clear dangling pointers in p9stat_free
Dominique Martinet [Mon, 27 Aug 2018 22:32:35 +0000 (07:32 +0900)]
9p: clear dangling pointers in p9stat_free

[ Upstream commit 62e3941776fea8678bb8120607039410b1b61a65 ]

p9stat_free is more of a cleanup function than a 'free' function as it
only frees the content of the struct; there are chances of use-after-free
if it is improperly used (e.g. p9stat_free called twice as it used to be
possible to)

Clearing dangling pointers makes the function idempotent and safer to use.

Link: http://lkml.kernel.org/r/1535410108-20650-2-git-send-email-asmadeus@codewreck.org
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Reported-by: syzbot+d4252148d198410b864f@syzkaller.appspotmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomedia: tvp5150: fix width alignment during set_selection()
Marco Felsch [Thu, 28 Jun 2018 16:20:33 +0000 (12:20 -0400)]
media: tvp5150: fix width alignment during set_selection()

[ Upstream commit bd24db04101f45a9c1d874fe21b0c7eab7bcadec ]

The driver ignored the width alignment which exists due to the UYVY
colorspace format. Fix the width alignment and make use of the the
provided v4l2 helper function to set the width, height and all
alignments in one.

Fixes: 963ddc63e20d ("[media] media: tvp5150: Add cropping support")

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agopowerpc/boot: Ensure _zimage_start is a weak symbol
Joel Stanley [Fri, 14 Sep 2018 04:06:47 +0000 (13:36 +0930)]
powerpc/boot: Ensure _zimage_start is a weak symbol

[ Upstream commit ee9d21b3b3583712029a0db65a4b7c081d08d3b3 ]

When building with clang crt0's _zimage_start is not marked weak, which
breaks the build when linking the kernel image:

 $ objdump -t arch/powerpc/boot/crt0.o |grep _zimage_start$
 0000000000000058 g       .text  0000000000000000 _zimage_start

 ld: arch/powerpc/boot/wrapper.a(crt0.o): in function '_zimage_start':
 (.text+0x58): multiple definition of '_zimage_start';
 arch/powerpc/boot/pseries-head.o:(.text+0x0): first defined here

Clang requires the .weak directive to appear after the symbol is
declared. The binutils manual says:

 This directive sets the weak attribute on the comma separated list of
 symbol names. If the symbols do not already exist, they will be
 created.

So it appears this is different with clang. The only reference I could
see for this was an OpenBSD mailing list post[1].

Changing it to be after the declaration fixes building with Clang, and
still works with GCC.

 $ objdump -t arch/powerpc/boot/crt0.o |grep _zimage_start$
 0000000000000058  w      .text 0000000000000000 _zimage_start

Reported to clang as https://bugs.llvm.org/show_bug.cgi?id=38921

[1] https://groups.google.com/forum/#!topic/fa.openbsd.tech/PAgKKen2YCY

Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoMIPS: kexec: Mark CPU offline before disabling local IRQ
Dengcheng Zhu [Tue, 11 Sep 2018 21:49:20 +0000 (14:49 -0700)]
MIPS: kexec: Mark CPU offline before disabling local IRQ

[ Upstream commit dc57aaf95a516f70e2d527d8287a0332c481a226 ]

After changing CPU online status, it will not be sent any IPIs such as in
__flush_cache_all() on software coherency systems. Do this before disabling
local IRQ.

Signed-off-by: Dengcheng Zhu <dzhu@wavecomp.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20571/
Cc: pburton@wavecomp.com
Cc: ralf@linux-mips.org
Cc: linux-mips@linux-mips.org
Cc: rachel.mozes@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomedia: pci: cx23885: handle adding to list failure
Nicholas Mc Guire [Sun, 9 Sep 2018 16:02:32 +0000 (12:02 -0400)]
media: pci: cx23885: handle adding to list failure

[ Upstream commit c5d59528e24ad22500347b199d52b9368e686a42 ]

altera_hw_filt_init() which calls append_internal() assumes
that the node was successfully linked in while in fact it can
silently fail. So the call-site needs to set return to -ENOMEM
on append_internal() returning NULL and exit through the err path.

Fixes: 349bcf02e361 ("[media] Altera FPGA based CI driver module")

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodrm/omap: fix memory barrier bug in DMM driver
Tomi Valkeinen [Wed, 26 Sep 2018 09:11:27 +0000 (12:11 +0300)]
drm/omap: fix memory barrier bug in DMM driver

[ Upstream commit 538f66ba204944470a653a4cccc5f8befdf97c22 ]

A DMM timeout "timed out waiting for done" has been observed on DRA7
devices. The timeout happens rarely, and only when the system is under
heavy load.

Debugging showed that the timeout can be made to happen much more
frequently by optimizing the DMM driver, so that there's almost no code
between writing the last DMM descriptors to RAM, and writing to DMM
register which starts the DMM transaction.

The current theory is that a wmb() does not properly ensure that the
data written to RAM is observable by all the components in the system.

This DMM timeout has caused interesting (and rare) bugs as the error
handling was not functioning properly (the error handling has been fixed
in previous commits):

 * If a DMM timeout happened when a GEM buffer was being pinned for
   display on the screen, a timeout error would be shown, but the driver
   would continue programming DSS HW with broken buffer, leading to
   SYNCLOST floods and possible crashes.

 * If a DMM timeout happened when other user (say, video decoder) was
   pinning a GEM buffer, a timeout would be shown but if the user
   handled the error properly, no other issues followed.

 * If a DMM timeout happened when a GEM buffer was being released, the
   driver does not even notice the error, leading to crashes or hang
   later.

This patch adds wmb() and readl() calls after the last bit is written to
RAM, which should ensure that the execution proceeds only after the data
is actually in RAM, and thus observable by DMM.

The read-back should not be needed. Further study is required to understand
if DMM is somehow special case and read-back is ok, or if DRA7's memory
barriers do not work correctly.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agopowerpc/nohash: fix undefined behaviour when testing page size support
Daniel Axtens [Mon, 1 Oct 2018 06:21:51 +0000 (16:21 +1000)]
powerpc/nohash: fix undefined behaviour when testing page size support

[ Upstream commit f5e284803a7206d43e26f9ffcae5de9626d95e37 ]

When enumerating page size definitions to check hardware support,
we construct a constant which is (1U << (def->shift - 10)).

However, the array of page size definitions is only initalised for
various MMU_PAGE_* constants, so it contains a number of 0-initialised
elements with def->shift == 0. This means we end up shifting by a
very large number, which gives the following UBSan splat:

================================================================================
UBSAN: Undefined behaviour in /home/dja/dev/linux/linux/arch/powerpc/mm/tlb_nohash.c:506:21
shift exponent 4294967286 is too large for 32-bit type 'unsigned int'
CPU: 0 PID: 0 Comm: swapper Not tainted 4.19.0-rc3-00045-ga604f927b012-dirty #6
Call Trace:
[c00000000101bc20] [c000000000a13d54] .dump_stack+0xa8/0xec (unreliable)
[c00000000101bcb0] [c0000000004f20a8] .ubsan_epilogue+0x18/0x64
[c00000000101bd30] [c0000000004f2b10] .__ubsan_handle_shift_out_of_bounds+0x110/0x1a4
[c00000000101be20] [c000000000d21760] .early_init_mmu+0x1b4/0x5a0
[c00000000101bf10] [c000000000d1ba28] .early_setup+0x100/0x130
[c00000000101bf90] [c000000000000528] start_here_multiplatform+0x68/0x80
================================================================================

Fix this by first checking if the element exists (shift != 0) before
constructing the constant.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotty: check name length in tty_find_polling_driver()
Miles Chen [Mon, 8 Oct 2018 02:39:17 +0000 (10:39 +0800)]
tty: check name length in tty_find_polling_driver()

[ Upstream commit 33a1a7be198657c8ca26ad406c4d2a89b7162bcc ]

The issue is found by a fuzzing test.
If tty_find_polling_driver() recevies an incorrect input such as
',,' or '0b', the len becomes 0 and strncmp() always return 0.
In this case, a null p->ops->poll_init() is called and it causes a kernel
panic.

Fix this by checking name length against zero in tty_find_polling_driver().

$echo ,, > /sys/module/kgdboc/parameters/kgdboc
[   20.804451] WARNING: CPU: 1 PID: 104 at drivers/tty/serial/serial_core.c:457
uart_get_baud_rate+0xe8/0x190
[   20.804917] Modules linked in:
[   20.805317] CPU: 1 PID: 104 Comm: sh Not tainted 4.19.0-rc7ajb #8
[   20.805469] Hardware name: linux,dummy-virt (DT)
[   20.805732] pstate: 20000005 (nzCv daif -PAN -UAO)
[   20.805895] pc : uart_get_baud_rate+0xe8/0x190
[   20.806042] lr : uart_get_baud_rate+0xc0/0x190
[   20.806476] sp : ffffffc06acff940
[   20.806676] x29: ffffffc06acff940 x28: 0000000000002580
[   20.806977] x27: 0000000000009600 x26: 0000000000009600
[   20.807231] x25: ffffffc06acffad0 x24: 00000000ffffeff0
[   20.807576] x23: 0000000000000001 x22: 0000000000000000
[   20.807807] x21: 0000000000000001 x20: 0000000000000000
[   20.808049] x19: ffffffc06acffac8 x18: 0000000000000000
[   20.808277] x17: 0000000000000000 x16: 0000000000000000
[   20.808520] x15: ffffffffffffffff x14: ffffffff00000000
[   20.808757] x13: ffffffffffffffff x12: 0000000000000001
[   20.809011] x11: 0101010101010101 x10: ffffff880d59ff5f
[   20.809292] x9 : ffffff880d59ff5e x8 : ffffffc06acffaf3
[   20.809549] x7 : 0000000000000000 x6 : ffffff880d59ff5f
[   20.809803] x5 : 0000000080008001 x4 : 0000000000000003
[   20.810056] x3 : ffffff900853e6b4 x2 : dfffff9000000000
[   20.810693] x1 : ffffffc06acffad0 x0 : 0000000000000cb0
[   20.811005] Call trace:
[   20.811214]  uart_get_baud_rate+0xe8/0x190
[   20.811479]  serial8250_do_set_termios+0xe0/0x6f4
[   20.811719]  serial8250_set_termios+0x48/0x54
[   20.811928]  uart_set_options+0x138/0x1bc
[   20.812129]  uart_poll_init+0x114/0x16c
[   20.812330]  tty_find_polling_driver+0x158/0x200
[   20.812545]  configure_kgdboc+0xbc/0x1bc
[   20.812745]  param_set_kgdboc_var+0xb8/0x150
[   20.812960]  param_attr_store+0xbc/0x150
[   20.813160]  module_attr_store+0x40/0x58
[   20.813364]  sysfs_kf_write+0x8c/0xa8
[   20.813563]  kernfs_fop_write+0x154/0x290
[   20.813764]  vfs_write+0xf0/0x278
[   20.813951]  __arm64_sys_write+0x84/0xf4
[   20.814400]  el0_svc_common+0xf4/0x1dc
[   20.814616]  el0_svc_handler+0x98/0xbc
[   20.814804]  el0_svc+0x8/0xc
[   20.822005] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[   20.826913] Mem abort info:
[   20.827103]   ESR = 0x84000006
[   20.827352]   Exception class = IABT (current EL), IL = 16 bits
[   20.827655]   SET = 0, FnV = 0
[   20.827855]   EA = 0, S1PTW = 0
[   20.828135] user pgtable: 4k pages, 39-bit VAs, pgdp = (____ptrval____)
[   20.828484] [0000000000000000] pgd=00000000aadee003, pud=00000000aadee003, pmd=0000000000000000
[   20.829195] Internal error: Oops: 84000006 [#1] SMP
[   20.829564] Modules linked in:
[   20.829890] CPU: 1 PID: 104 Comm: sh Tainted: G        W         4.19.0-rc7ajb #8
[   20.830545] Hardware name: linux,dummy-virt (DT)
[   20.830829] pstate: 60000085 (nZCv daIf -PAN -UAO)
[   20.831174] pc :           (null)
[   20.831457] lr : serial8250_do_set_termios+0x358/0x6f4
[   20.831727] sp : ffffffc06acff9b0
[   20.831936] x29: ffffffc06acff9b0 x28: ffffff9008d7c000
[   20.832267] x27: ffffff900969e16f x26: 0000000000000000
[   20.832589] x25: ffffff900969dfb0 x24: 0000000000000000
[   20.832906] x23: ffffffc06acffad0 x22: ffffff900969e160
[   20.833232] x21: 0000000000000000 x20: ffffffc06acffac8
[   20.833559] x19: ffffff900969df90 x18: 0000000000000000
[   20.833878] x17: 0000000000000000 x16: 0000000000000000
[   20.834491] x15: ffffffffffffffff x14: ffffffff00000000
[   20.834821] x13: ffffffffffffffff x12: 0000000000000001
[   20.835143] x11: 0101010101010101 x10: ffffff880d59ff5f
[   20.835467] x9 : ffffff880d59ff5e x8 : ffffffc06acffaf3
[   20.835790] x7 : 0000000000000000 x6 : ffffff880d59ff5f
[   20.836111] x5 : c06419717c314100 x4 : 0000000000000007
[   20.836419] x3 : 0000000000000000 x2 : 0000000000000000
[   20.836732] x1 : 0000000000000001 x0 : ffffff900969df90
[   20.837100] Process sh (pid: 104, stack limit = 0x(____ptrval____))
[   20.837396] Call trace:
[   20.837566]            (null)
[   20.837816]  serial8250_set_termios+0x48/0x54
[   20.838089]  uart_set_options+0x138/0x1bc
[   20.838570]  uart_poll_init+0x114/0x16c
[   20.838834]  tty_find_polling_driver+0x158/0x200
[   20.839119]  configure_kgdboc+0xbc/0x1bc
[   20.839380]  param_set_kgdboc_var+0xb8/0x150
[   20.839658]  param_attr_store+0xbc/0x150
[   20.839920]  module_attr_store+0x40/0x58
[   20.840183]  sysfs_kf_write+0x8c/0xa8
[   20.840183]  sysfs_kf_write+0x8c/0xa8
[   20.840440]  kernfs_fop_write+0x154/0x290
[   20.840702]  vfs_write+0xf0/0x278
[   20.840942]  __arm64_sys_write+0x84/0xf4
[   20.841209]  el0_svc_common+0xf4/0x1dc
[   20.841471]  el0_svc_handler+0x98/0xbc
[   20.841713]  el0_svc+0x8/0xc
[   20.842057] Code: bad PC value
[   20.842764] ---[ end trace a8835d7de79aaadf ]---
[   20.843134] Kernel panic - not syncing: Fatal exception
[   20.843515] SMP: stopping secondary CPUs
[   20.844289] Kernel Offset: disabled
[   20.844634] CPU features: 0x0,21806002
[   20.844857] Memory Limit: none
[   20.845172] ---[ end Kernel panic - not syncing: Fatal exception ]---

Signed-off-by: Miles Chen <miles.chen@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodm: remove duplicate dm_get_live_table() in __dm_destroy()
Corey Wright [Sun, 11 Nov 2018 08:22:36 +0000 (02:22 -0600)]
dm: remove duplicate dm_get_live_table() in __dm_destroy()

[3.18.y only, to fix a previous patch]

__dm_destroy() takes io_barrier SRCU lock (dm_get_live_table) twice
which leads to a deadlock.  Remove taking lock before holding
suspend_lock to prevent a different potential deadlock.

Signed-off-by: Corey Wright <undefined@pobox.com>
Fixes: e1db66a5fdcc ("dm: fix AB-BA deadlock in __dm_destroy()")
Cc: Sasha Levin <sashal@kernel.org>
5 years agoCramfs: fix abad comparison when wrap-arounds occur
Nicolas Pitre [Tue, 30 Oct 2018 17:26:15 +0000 (13:26 -0400)]
Cramfs: fix abad comparison when wrap-arounds occur

commit 672ca9dd13f1aca0c17516f76fc5b0e8344b3e46 upstream.

It is possible for corrupted filesystem images to produce very large
block offsets that may wrap when a length is added, and wrongly pass
the buffer size test.

Reported-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomedia: em28xx: make v4l2-compliance happier by starting sequence on zero
Mauro Carvalho Chehab [Fri, 14 Sep 2018 02:46:29 +0000 (22:46 -0400)]
media: em28xx: make v4l2-compliance happier by starting sequence on zero

commit afeaade90db4c5dab93f326d9582be1d5954a198 upstream.

The v4l2-compliance tool complains if a video doesn't start
with a zero sequence number.

While this shouldn't cause any real problem for apps, let's
make it happier, in order to better check the v4l2-compliance
differences before and after patchsets.

This is actually an old issue. It is there since at least its
videobuf2 conversion, e. g. changeset 3829fadc461 ("[media]
em28xx: convert to videobuf2"), if VB1 wouldn't suffer from
the same issue.

Cc: stable@vger.kernel.org
Fixes: d3829fadc461 ("[media] em28xx: convert to videobuf2")
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>