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ASoC: codecs: wcd934x: add a sanity check in set channel map

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set channel map can be passed with a channel maps, however if
the number of channels that are passed are more than the actual
supported channels then we would be accessing array out of bounds.

So add a sanity check to validate these numbers!

Fixes: a61f3b4f47 ("ASoC: wcd934x: add support to wcd9340/wcd9341 codec")
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210309142129.14182-4-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Srinivas Kandagatla 2021-03-09 14:21:29 +00:00 committed by Mark Brown
parent 4800fe6ea1
commit 3bb4852d59
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GPG key ID: 24D68B725D5487D0
1 changed files with 6 additions and 0 deletions
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6
sound/soc/codecs/wcd934x.c
View file

@ -1873,6 +1873,12 @@ static int wcd934x_set_channel_map(struct snd_soc_dai *dai,
wcd = snd_soc_component_get_drvdata(dai->component);
if (tx_num > WCD934X_TX_MAX || rx_num > WCD934X_RX_MAX) {
dev_err(wcd->dev, "Invalid tx %d or rx %d channel count\n",
tx_num, rx_num);
return -EINVAL;
}
if (!tx_slot || !rx_slot) {
dev_err(wcd->dev, "Invalid tx_slot=%p, rx_slot=%p\n",
tx_slot, rx_slot);