linux-stable.git/drivers/hid, branch v4.4.78

HID: i2c-hid: Add sleep between POWER ON and RESET

2017-07-05T12:37:20+00:00

[ Upstream commit a89af4abdf9b353cdd6f61afc0eaaac403304873 ]

Support for the Asus Touchpad was recently added. It turns out this
device can fail initialisation (and become unusable) when the RESET
command is sent too soon after the POWER ON command.

Unfortunately the i2c-hid specification does not specify the need for
a delay between these two commands. But it was discovered the Windows
driver has a 1ms delay.

As a result, this patch modifies the i2c-hid module to add a sleep
inbetween the POWER ON and RESET commands which lasts between 1ms and 5ms.

See https://github.com/vlasenko/hid-asus-dkms/issues/24 for further
details.

Signed-off-by: Brendan McGrath 
Reviewed-by: Benjamin Tissoires 
Signed-off-by: Jiri Kosina 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

HID: Add quirk for Dell PIXART OEM mouse

2017-06-29T10:48:51+00:00

commit 3db28271f0feae129262d30e41384a7c4c767987 upstream.

This mouse is also known under other IDs. It needs the quirk
ALWAYS_POLL or will disconnect in runlevel 1 or 3.

Signed-off-by: Sebastian Parschauer 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: wacom: Have wacom_tpc_irq guard against possible NULL dereference

2017-06-07T10:06:00+00:00

commit 2ac97f0f6654da14312d125005c77a6010e0ea38 upstream.

The following Smatch complaint was generated in response to commit
2a6cdbd ("HID: wacom: Introduce new 'touch_input' device"):

    drivers/hid/wacom_wac.c:1586 wacom_tpc_irq()
             error: we previously assumed 'wacom->touch_input' could be null (see line 1577)

The 'touch_input' and 'pen_input' variables point to the 'struct input_dev'
used for relaying touch and pen events to userspace, respectively. If a
device does not have a touch interface or pen interface, the associated
input variable is NULL. The 'wacom_tpc_irq()' function is responsible for
forwarding input reports to a more-specific IRQ handler function. An
unknown report could theoretically be mistaken as e.g. a touch report
on a device which does not have a touch interface. This can be prevented
by only calling the pen/touch functions are called when the pen/touch
pointers are valid.

Fixes: 2a6cdbd ("HID: wacom: Introduce new 'touch_input' device")
Signed-off-by: Jason Gerecke 
Reviewed-by: Ping Cheng 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: wacom: Fix poor prox handling in 'wacom_pl_irq'

2017-02-09T07:02:46+00:00

commit 282e4637bc1c0b338708bcebd09d31c69abec070 upstream.

Commit 025bcc1 performed cleanup work on the 'wacom_pl_irq' function, making
it follow the standards used in the rest of the codebase. The change
unintiontionally allowed the function to send input events from reports
that are not marked as being in prox. This can cause problems as the
report values for X, Y, etc. are not guaranteed to be correct. In
particular, occasionally the tablet will send a report with these values
set to zero. If such a report is received it can caus an unexpected jump
in the XY position.

This patch surrounds more of the processing code with a proximity check,
preventing these zeroed reports from overwriting the current state. To
be safe, only the tool type and ABS_MISC events should be reported when
the pen is marked as being out of prox.

Fixes: 025bcc1540 ("HID: wacom: Simplify 'wacom_pl_irq'")
Signed-off-by: Jason Gerecke 
Reviewed-by: Ping Cheng 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: corsair: fix control-transfer error handling

2017-01-26T07:23:48+00:00

commit 7a546af50eb78ab99840903083231eb635c8a566 upstream.

Make sure to check for short control transfers in order to avoid parsing
uninitialised buffer data and leaking it to user space.

Note that the backlight and macro-mode buffer constraints are kept as
loose as possible in order to avoid any regressions should the current
buffer sizes be larger than necessary.

Fixes: 6f78193ee9ea ("HID: corsair: Add Corsair Vengeance K90 driver")
Signed-off-by: Johan Hovold 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: corsair: fix DMA buffers on stack

2017-01-26T07:23:48+00:00

commit 6d104af38b570d37aa32a5803b04c354f8ed513d upstream.

Not all platforms support DMA to the stack, and specifically since v4.9
this is no longer supported on x86 with VMAP_STACK either.

Note that the macro-mode buffer was larger than necessary.

Fixes: 6f78193ee9ea ("HID: corsair: Add Corsair Vengeance K90 driver")
Signed-off-by: Johan Hovold 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: hid-cypress: validate length of report

2017-01-15T12:41:36+00:00

commit 1ebb71143758f45dc0fa76e2f48429e13b16d110 upstream.

Make sure we have enough of a report structure to validate before
looking at it.

Reported-by: Benoit Camredon 
Tested-by: Benoit Camredon 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Jiri Kosina

HID: usbhid: add ATEN CS962 to list of quirky devices

2016-11-10T15:36:37+00:00

commit cf0ea4da4c7df11f7a508b2f37518e0f117f3791 upstream.

Like many similar devices it needs a quirk to work.
Issuing the request gets the device into an irrecoverable state.

Signed-off-by: Oliver Neukum 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman

HID: core: prevent out-of-bound readings

2016-09-15T06:27:48+00:00

[ Upstream commit 50220dead1650609206efe91f0cc116132d59b3f ]

Plugging a Logitech DJ receiver with KASAN activated raises a bunch of
out-of-bound readings.

The fields are allocated up to MAX_USAGE, meaning that potentially, we do
not have enough fields to fit the incoming values.
Add checks and silence KASAN.

Signed-off-by: Benjamin Tissoires 
Signed-off-by: Jiri Kosina 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

HID: uhid: fix timeout when probe races with IO

2016-08-20T16:09:19+00:00

commit 67f8ecc550b5bda03335f845dc869b8501d25fd0 upstream.

Many devices use userspace bluetooth stacks like BlueZ or Bluedroid in combination
with uhid. If any of these stacks is used with a HID device for which the driver
performs a HID request as part .probe (or technically another HID operation),
this results in a deadlock situation. The deadlock results in a 5 second timeout
for I/O operations in HID drivers, so isn't fatal, but none of the I/O operations
have a chance of succeeding.

The root cause for the problem is that uhid only allows for one request to be
processed at a time per uhid instance and locks out other operations. This means
that if a user space is creating a new HID device through 'UHID_CREATE', which
ultimately triggers '.probe' through the HID layer. Then any HID request e.g. a
read for calibration data would trigger a HID operation on uhid again, but it
won't go out to userspace, because it is still stuck in UHID_CREATE.
In addition bluetooth stacks are typically single threaded, so they wouldn't be
able to handle any requests while waiting on uhid.

Lucikly the UHID spec is somewhat flexible and allows for fixing the issue,
without breaking user space. The idea which the patch implements as discussed
with David Herrmann is to decouple adding of a hid device (which triggers .probe)
from UHID_CREATE. The work will kick off roughly once UHID_CREATE completed (or
else will wait a tiny bit of time in .probe for a lock). A HID driver has to call
HID to call 'hid_hw_start()' as part of .probe once it is ready for I/O, which
triggers UHID_START to user space. Any HID operations should function now within
.probe and won't deadlock because userspace is stuck on UHID_CREATE.

We verified this patch on Bluedroid with Android 6.0 and on desktop Linux with
BlueZ stacks. Prior to the patch they had the deadlock issue.

[jkosina@suse.cz: reword subject]
Signed-off-by: Roderick Colenbrander 
Signed-off-by: Jiri Kosina 
Signed-off-by: Greg Kroah-Hartman