diff --git a/voice_processing/voice_processing.c b/voice_processing/voice_processing.c
index b8b1e1b..9543f96 100644
--- a/voice_processing/voice_processing.c
+++ b/voice_processing/voice_processing.c
@@ -559,7 +559,9 @@
             if (pCmdData == NULL ||
                     cmdSize < (int)sizeof(effect_param_t) ||
                     pReplyData == NULL ||
-                    *replySize < (int)sizeof(effect_param_t)) {
+                    *replySize < (int)sizeof(effect_param_t) ||
+                    // constrain memcpy below
+                    ((effect_param_t *)pCmdData)->psize > *replySize - sizeof(effect_param_t)) {
                 ALOGV("fx_command() EFFECT_CMD_GET_PARAM invalid args");
                 return -EINVAL;
             }