From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
commit 3bb4852d598f0275ed5996a059df55be7318ac2f upstream.
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: a61f3b4f476e ("ASoC: wcd934x: add support to wcd9340/wcd9341 codec")
Reported-by: John Stultz <john.stultz@xxxxxxxxxx>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210309142129.14182-4-srinivas.kandagatla@xxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/wcd934x.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/sound/soc/codecs/wcd934x.c
+++ b/sound/soc/codecs/wcd934x.c
@@ -1873,6 +1873,12 @@ static int wcd934x_set_channel_map(struc
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);
