dsp: adm: add to check output/input channel

To avoid out of bound value of output/input
channel add the check.

Change-Id: I25b7616d6fc08c2d0bb530dfb1457471dc25861c
Signed-off-by: Shashi Kant Maurya <smaury@codeaurora.org>
diff --git a/techpack/audio/asoc/msm-pcm-routing-v2.c b/techpack/audio/asoc/msm-pcm-routing-v2.c
index 06de2f4..179f9a28 100644
--- a/techpack/audio/asoc/msm-pcm-routing-v2.c
+++ b/techpack/audio/asoc/msm-pcm-routing-v2.c
@@ -1342,6 +1342,11 @@ static int msm_pcm_routing_channel_mixer(int fe_id, bool perf_mode,
 	for (i = 0; i < ADM_MAX_CHANNELS && channel_input[fe_id][i] > 0;
 		++i) {
 		be_id = channel_input[fe_id][i] - 1;
+		if (be_id < 0 || be_id >= MSM_BACKEND_DAI_MAX) {
+			pr_err("%s: Received out of bounds be_id %d\n",
+					__func__, be_id);
+			return -EINVAL;
+		}
 		channel_mixer[fe_id].input_channels[i] =
 						msm_bedais[be_id].channel;
 
@@ -2853,10 +2858,10 @@ static int msm_pcm_get_out_chs(struct snd_kcontrol *kcontrol,
 static int msm_pcm_put_out_chs(struct snd_kcontrol *kcontrol,
 				struct snd_ctl_elem_value *ucontrol)
 {
-	u16 fe_id = 0;
-
+	u16 fe_id = 0, out_ch = 0;
 	fe_id = ((struct soc_multi_mixer_control *)
 			kcontrol->private_value)->shift;
+	out_ch = ucontrol->value.integer.value[0];
 	if (fe_id >= MSM_FRONTEND_DAI_MM_SIZE) {
 		pr_err("%s: invalid FE %d\n", __func__, fe_id);
 		return -EINVAL;
@@ -2865,6 +2870,12 @@ static int msm_pcm_put_out_chs(struct snd_kcontrol *kcontrol,
 	pr_debug("%s: fe_id is %d, output channels = %d\n", __func__,
 			fe_id,
 			(unsigned int)(ucontrol->value.integer.value[0]));
+	if (out_ch < 0 ||
+		out_ch > ADM_MAX_CHANNELS) {
+		pr_err("%s: invalid output channel %d\n", __func__,
+				out_ch);
+		return -EINVAL;
+	}
 	channel_mixer[fe_id].output_channel =
 			(unsigned int)(ucontrol->value.integer.value[0]);