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| author | Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> | 2024-07-26 16:10:41 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-07-29 14:36:32 +0200 |
| commit | aebb1813c279ce8f3a2dfa3f86def0c0ec1cbb8d (patch) | |
| tree | f2010ebe5e07e67d9ba10b8fb663583302dd8cb6 /sound/soc/codecs/wcd937x-sdw.c | |
| parent | Linux 6.11-rc1 (diff) | |
| download | linux-aebb1813c279ce8f3a2dfa3f86def0c0ec1cbb8d.tar.xz linux-aebb1813c279ce8f3a2dfa3f86def0c0ec1cbb8d.zip | |
ASoC: codecs: wcd937x-sdw: Correct Soundwire ports mask
Device has up to WCD937X_MAX_TX_SWR_PORTS (or WCD937X_MAX_SWR_PORTS
for sink) number of ports and the array assigned to prop.src_dpn_prop
and prop.sink_dpn_prop has 0..WCD937X_MAX_TX_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 WCD937X_MAX_TX_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: c99a515ff153 ("ASoC: codecs: wcd937x-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-v1-1-d4d7a8b56f05@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/codecs/wcd937x-sdw.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/soc/codecs/wcd937x-sdw.c b/sound/soc/codecs/wcd937x-sdw.c index 3abc8041406a..0c33f7f3dc25 100644 --- a/sound/soc/codecs/wcd937x-sdw.c +++ b/sound/soc/codecs/wcd937x-sdw.c @@ -1049,7 +1049,7 @@ static int wcd9370_probe(struct sdw_slave *pdev, pdev->prop.lane_control_support = true; pdev->prop.simple_clk_stop_capable = true; if (wcd->is_tx) { - pdev->prop.source_ports = GENMASK(WCD937X_MAX_TX_SWR_PORTS, 0); + pdev->prop.source_ports = GENMASK(WCD937X_MAX_TX_SWR_PORTS - 1, 0); pdev->prop.src_dpn_prop = wcd937x_dpn_prop; wcd->ch_info = &wcd937x_sdw_tx_ch_info[0]; pdev->prop.wake_capable = true; @@ -1062,7 +1062,7 @@ static int wcd9370_probe(struct sdw_slave *pdev, /* Start in cache-only until device is enumerated */ regcache_cache_only(wcd->regmap, true); } else { - pdev->prop.sink_ports = GENMASK(WCD937X_MAX_SWR_PORTS, 0); + pdev->prop.sink_ports = GENMASK(WCD937X_MAX_SWR_PORTS - 1, 0); pdev->prop.sink_dpn_prop = wcd937x_dpn_prop; wcd->ch_info = &wcd937x_sdw_rx_ch_info[0]; } |