diff --git a/dsp/q6asm.c b/dsp/q6asm.c
index 0f7c8ea..c4c90fe 100644
--- a/dsp/q6asm.c
+++ b/dsp/q6asm.c
@@ -1954,6 +1954,7 @@
 		data->dest_port);
 	if ((data->opcode != ASM_DATA_EVENT_RENDERED_EOS) &&
 	    (data->opcode != ASM_DATA_EVENT_EOS) &&
+	    (data->opcode != ASM_SESSION_EVENTX_OVERFLOW) &&
 	    (data->opcode != ASM_SESSION_EVENT_RX_UNDERFLOW)) {
 		if (payload == NULL) {
 			pr_err("%s: payload is null\n", __func__);
@@ -2159,6 +2160,16 @@
 			}
 			spin_lock_irqsave(&port->dsp_lock, dsp_flags);
 			buf_index = asm_token._token.buf_index;
+			if (buf_index < 0 || buf_index >= port->max_buf_cnt) {
+				pr_debug("%s: Invalid buffer index %u\n",
+					__func__, buf_index);
+				spin_unlock_irqrestore(&port->dsp_lock,
+								dsp_flags);
+				spin_unlock_irqrestore(
+					&(session[session_id].session_lock),
+					flags);
+				return -EINVAL;
+			}
 			if (data->payload_size >= 2 * sizeof(uint32_t) &&
 				(lower_32_bits(port->buf[buf_index].phys) !=
 				payload[0] ||
@@ -2268,6 +2279,16 @@
 			}
 			spin_lock_irqsave(&port->dsp_lock, dsp_flags);
 			buf_index = asm_token._token.buf_index;
+			if (buf_index < 0 || buf_index >= port->max_buf_cnt) {
+				pr_debug("%s: Invalid buffer index %u\n",
+					__func__, buf_index);
+				spin_unlock_irqrestore(&port->dsp_lock,
+								dsp_flags);
+				spin_unlock_irqrestore(
+					&(session[session_id].session_lock),
+					flags);
+				return -EINVAL;
+			}
 			port->buf[buf_index].used = 0;
 			if (lower_32_bits(port->buf[buf_index].phys) !=
 			payload[READDONE_IDX_BUFADD_LSW] ||