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Jason Gerecke 20f3cf5f86 HID: wacom: Avoid using stale array indicies to read contact count
If we ever see a touch report with contact count data we initialize
several variables used to read the contact count in the pre-report
phase. These variables are never reset if we process a report which
doesn't contain a contact count, however. This can cause the pre-
report function to trigger a read of arbitrary memory (e.g. NULL
if we're lucky) and potentially crash the driver.

This commit restores resetting of the variables back to default
"none" values that were used prior to the commit mentioned
below.

Link: https://github.com/linuxwacom/input-wacom/issues/276
Fixes: 003f50ab67 (HID: wacom: Update last_slot_field during pre_report phase)
CC: stable@vger.kernel.org
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Reviewed-by: Ping Cheng <ping.cheng@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2022-01-21 15:10:02 +01:00
arch hwmon updates for v5.17 2022-01-11 10:25:36 -08:00
block
certs
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2022-01-11 10:21:35 -08:00
Documentation Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2022-01-11 10:53:57 -08:00
drivers HID: wacom: Avoid using stale array indicies to read contact count 2022-01-21 15:10:02 +01:00
fs select: Fix indefinitely sleeping task in poll_schedule_timeout() 2022-01-11 09:03:05 -08:00
include Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2022-01-11 10:53:57 -08:00
init KCSAN updates for v5.17 2022-01-11 09:51:26 -08:00
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kernel KCSAN updates for v5.17 2022-01-11 09:51:26 -08:00
lib Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2022-01-11 10:21:35 -08:00
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mm KCSAN updates for v5.17 2022-01-11 09:51:26 -08:00
net netfilter: nf_tables: don't use 'data_size' uninitialized 2022-01-10 19:33:36 -08:00
samples
scripts This isn't a hugely busy cycle for documentation, but a few significant 2022-01-11 10:00:04 -08:00
security Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2022-01-11 10:21:35 -08:00
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MAINTAINERS Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2022-01-11 10:53:57 -08:00
Makefile
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.