Alexander Shishkin eabd7d248e stm class: Prevent division by zero ...

commit bf7cbaae08 upstream.

Using STP_POLICY_ID_SET ioctl command with dummy_stm device, or any STM
device that supplies zero mmio channel size, will trigger a division by
zero bug in the kernel.

Prevent this by disallowing channel widths other than 1 for such devices.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Fixes: 7bd1d4093c ("stm class: Introduce an abstraction for System Trace Module devices")
CC: stable@vger.kernel.org # v4.4+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2019-03-23 20:09:52 +01:00

..

console.c

stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate

2018-03-28 18:47:17 +03:00

core.c

stm class: Prevent division by zero

2019-03-23 20:09:52 +01:00

dummy_stm.c

stm class: Make dummy's master/channel ranges configurable

2018-03-28 18:47:18 +03:00

ftrace.c

coresight: Moving framework and drivers to SPDX identifier

2018-05-14 16:19:59 +02:00

heartbeat.c

stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate

2018-03-28 18:47:17 +03:00

Kconfig

stm class: ftrace: Add ftrace-export-over-stm driver

2016-11-22 17:47:48 -05:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

policy.c

stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate

2018-03-28 18:47:17 +03:00

stm.h

stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate

2018-03-28 18:47:17 +03:00