diff options
| author | Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> | 2024-07-26 16:10:43 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-07-29 13:36:34 +0100 |
| commit | 74a79977c4e1d09eced33e6e22f875a5bb3fad29 (patch) | |
| tree | b95d1c50c43fe6a537a7f30738e29cbe277d7c28 /sound | |
| parent | 3f6fb03dae9c7dfba7670858d29e03c8faaa89fe (diff) | |
ASoC: codecs: wcd939x-sdw: Correct Soundwire ports mask
Device has up to WCD939X_MAX_TX_SWR_PORTS (or WCD939X_MAX_RX_SWR_PORTS
for sink) number of ports and the array assigned to prop.src_dpn_prop
and prop.sink_dpn_prop has 0..WCD939X_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 WCD939X_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: be2af391cea0 ("ASoC: codecs: Add WCD939x Soundwire devices driver")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240726-asoc-wcd-wsa-swr-ports-genmask-v1-3-d4d7a8b56f05@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/wcd939x-sdw.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/soc/codecs/wcd939x-sdw.c b/sound/soc/codecs/wcd939x-sdw.c index 94b1e99a3ca0..fca95777a75a 100644 --- a/sound/soc/codecs/wcd939x-sdw.c +++ b/sound/soc/codecs/wcd939x-sdw.c @@ -1453,12 +1453,12 @@ static int wcd9390_probe(struct sdw_slave *pdev, const struct sdw_device_id *id) pdev->prop.lane_control_support = true; pdev->prop.simple_clk_stop_capable = true; if (wcd->is_tx) { - pdev->prop.source_ports = GENMASK(WCD939X_MAX_TX_SWR_PORTS, 0); + pdev->prop.source_ports = GENMASK(WCD939X_MAX_TX_SWR_PORTS - 1, 0); pdev->prop.src_dpn_prop = wcd939x_tx_dpn_prop; wcd->ch_info = &wcd939x_sdw_tx_ch_info[0]; pdev->prop.wake_capable = true; } else { - pdev->prop.sink_ports = GENMASK(WCD939X_MAX_RX_SWR_PORTS, 0); + pdev->prop.sink_ports = GENMASK(WCD939X_MAX_RX_SWR_PORTS - 1, 0); pdev->prop.sink_dpn_prop = wcd939x_rx_dpn_prop; wcd->ch_info = &wcd939x_sdw_rx_ch_info[0]; } |