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Alexander Shishkin 0eb3a49df5 stm class: Fix channel bitmap on 32-bit systems

commit 51e0f22781 upstream.

Commit 7bd1d4093c ("stm class: Introduce an abstraction for System Trace
Module devices") naively calculates the channel bitmap size in 64-bit
chunks regardless of the size of underlying unsigned long, making the
bitmap half as big on a 32-bit system. This leads to an out of bounds
access with the upper half of the bitmap.

Fix this by using BITS_TO_LONGS. While at it, convert to using
struct_size() for the total size calculation of the master struct.

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

2019-05-25 18:16:22 +02:00

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: Fix channel bitmap on 32-bit systems

2019-05-25 18:16:22 +02:00

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