diff --git a/src/audio/copier/copier_gain.c b/src/audio/copier/copier_gain.c
index fc9f6664add8..842f92997108 100644
--- a/src/audio/copier/copier_gain.c
+++ b/src/audio/copier/copier_gain.c
@@ -150,7 +150,7 @@ int copier_gain_dma_control(union ipc4_connector_node_id node, const char *confi
 		}
 
 		struct ipc4_copier_module_cfg *copier_cfg = cd->dd[0]->dai_spec_config;
-		const int channels = copier_cfg->base.audio_fmt.channels_count;
+		const uint32_t channels = copier_cfg->base.audio_fmt.channels_count;
 
 		ret = copier_set_gain(dev, cd->dd[0]->gain_data, gain_data, channels);
 		if (ret)
@@ -162,7 +162,7 @@ int copier_gain_dma_control(union ipc4_connector_node_id node, const char *confi
 }
 
 int copier_set_gain(struct comp_dev *dev, struct copier_gain_params *gain_params,
-		    struct gain_dma_control_data *gain_data, int channels)
+		    struct gain_dma_control_data *gain_data, uint32_t channels)
 {
 	uint16_t static_gain[MAX_GAIN_COEFFS_CNT];
 	int ret;
@@ -172,12 +172,17 @@ int copier_set_gain(struct comp_dev *dev, struct copier_gain_params *gain_params
 		return -EINVAL;
 	}
 
+	if (channels == 0 || channels > MAX_GAIN_COEFFS_CNT) {
+		comp_err(dev, "invalid channels count %u", channels);
+		return -EINVAL;
+	}
+
 	/* Set gain coefficients */
 	comp_info(dev, "Update gain coefficients from DMA_CONTROL ipc");
 
 	size_t gain_coef_size = channels * sizeof(uint16_t);
 
-	ret = memcpy_s(static_gain, gain_coef_size, gain_data->gain_coeffs,
+	ret = memcpy_s(static_gain, sizeof(static_gain), gain_data->gain_coeffs,
 		       gain_coef_size);
 	if (ret) {
 		comp_err(dev, "memcpy_s failed with error %d", ret);
diff --git a/src/audio/copier/copier_gain.h b/src/audio/copier/copier_gain.h
index ec55ff999206..bd7cc5719f5b 100644
--- a/src/audio/copier/copier_gain.h
+++ b/src/audio/copier/copier_gain.h
@@ -8,6 +8,7 @@
 #ifndef __SOF_COPIER_GAIN_H__
 #define __SOF_COPIER_GAIN_H__
 
+#include <stdint.h>
 #include <sof/audio/buffer.h>
 #include <ipc4/base_fw.h>
 #include <ipc4/gateway.h>
@@ -219,7 +220,7 @@ enum copier_gain_state copier_gain_eval_state(struct copier_gain_params *gain_pa
  * @return 0 on success, otherwise a negative error code.
  */
 int copier_set_gain(struct comp_dev *dev, struct copier_gain_params *gain_params,
-		    struct gain_dma_control_data *gain_data, int channels);
+		    struct gain_dma_control_data *gain_data, uint32_t channels);
 
 /**
  * Checks for unity gain mode.