diff --git a/sound/soc/codecs/rt5506.c b/sound/soc/codecs/rt5506.c
index 74572c4..fbce69a 100644
--- a/sound/soc/codecs/rt5506.c
+++ b/sound/soc/codecs/rt5506.c
@@ -676,6 +676,8 @@
 {
 	if (mode >= rt5506_cfg_data.mode_num)
 		return -EINVAL;
+	if (rt5506_cfg_data.cmd_data[mode].config.reg_len > MAX_REG_DATA)
+		return -EINVAL;
 
 	pr_info("%s: set mode %d\n", __func__, mode);