ASoC: codecs: wcd938x-sdw: Correct Soundwire ports mask

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[ Upstream commit 3f6fb03dae ]

Device has up to WCD938X_MAX_SWR_PORTS number of ports and the array
assigned to prop.src_dpn_prop and prop.sink_dpn_prop has
0..WCD938X_MAX_SWR_PORTS-1 elements.  On the other hand, GENMASK(high,
low) creates an inclusive mask between <high, low>, so we need the mask
from 0 up to WCD938X_MAX_SWR_PORTS-1.

Theoretically, too wide mask could cause an out of bounds read in
sdw_get_slave_dpn_prop() in stream.c, however only in the case of buggy
driver, e.g. adding incorrect number of ports via
sdw_stream_add_slave().

Fixes: 16572522ae ("ASoC: codecs: wcd938x-sdw: add SoundWire driver")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240726-asoc-wcd-wsa-swr-ports-genmask-v1-2-d4d7a8b56f05@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Krzysztof Kozlowski 2024-07-26 16:10:42 +02:00 • committed by Greg Kroah-Hartman

parent 93d89bb74d

commit fce8bfcf72

1 changed files with 2 additions and 2 deletions

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sound/soc/codecs/wcd938x-sdw.c

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