[PATCH] ASoC: qcom: Fix sc7280 lpass potential buffer overflow

[Evgeny Pimenov]

Case values introduced in commit
5f78e1fb7a3e ("ASoC: qcom: Add driver support for audioreach solution")
cause out of bounds access in arrays of sc7280 driver data (e.g. in case
of RX_CODEC_DMA_RX_0 in sc7280_snd_hw_params()).

Redefine LPASS_MAX_PORTS to consider the maximum possible port id for
q6dsp as sc7280 driver utilizes some of those values.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 77d0ffef793d ("ASoC: qcom: Add macro for lpass DAI id's max limit")
Cc: stable@xxxxxxxxxxxxxxx # v6.0+
Suggested-by: Mikhail Kobuk <m.kobuk@xxxxxxxxx>
Suggested-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
Signed-off-by: Evgeny Pimenov <pimenoveu12@xxxxxxxxx>
---
 sound/soc/qcom/lpass.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/qcom/lpass.h b/sound/soc/qcom/lpass.h
index 27a2bf9a6613..de3ec6f594c1 100644
--- a/sound/soc/qcom/lpass.h
+++ b/sound/soc/qcom/lpass.h
@@ -13,10 +13,11 @@
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <dt-bindings/sound/qcom,lpass.h>
+#include <dt-bindings/sound/qcom,q6afe.h>
 #include "lpass-hdmi.h"
 
 #define LPASS_AHBIX_CLOCK_FREQUENCY		131072000
-#define LPASS_MAX_PORTS			(LPASS_CDC_DMA_VA_TX8 + 1)
+#define LPASS_MAX_PORTS			(DISPLAY_PORT_RX_7 + 1)
 #define LPASS_MAX_MI2S_PORTS			(8)
 #define LPASS_MAX_DMA_CHANNELS			(8)
 #define LPASS_MAX_HDMI_DMA_CHANNELS		(4)
-- 
2.39.5