diff --git a/include/os/osString.h b/include/os/osString.h
index ac7dd7eda8..8672da616d 100644
--- a/include/os/osString.h
+++ b/include/os/osString.h
@@ -55,7 +55,7 @@ typedef enum { M2C = 0, C2M } ConvType;
 
 #define tstrncpy(dst, src, size)   \
   do {                             \
-    strncpy((dst), (src), (size)); \
+    (void)strncpy((dst), (src), (size)); \
     (dst)[(size)-1] = 0;           \
   } while (0)
 
diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index 02fbe7aae5..00445b4d12 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -1672,6 +1672,10 @@ static int32_t smlPushCols(SArray *colsArray, SArray *cols) {
   }
   for (size_t i = 0; i < taosArrayGetSize(cols); i++) {
     SSmlKv *kv = (SSmlKv *)taosArrayGet(cols, i);
+    if (kv == NULL){
+      taosHashCleanup(kvHash);
+      return TSDB_CODE_SML_INVALID_DATA;
+    }
     terrno = 0;
     int32_t code = taosHashPut(kvHash, kv->key, kv->keyLen, &kv, POINTER_BYTES);
     if (terrno == TSDB_CODE_DUP_KEY) {
@@ -1884,7 +1888,7 @@ static int32_t smlInsertData(SSmlHandle *info) {
   info->cost.insertRpcTime = taosGetTimestampUs();
 
   SAppClusterSummary *pActivity = &info->taos->pAppInfo->summary;
-  atomic_add_fetch_64((int64_t *)&pActivity->numOfInsertsReq, 1);
+  (void)atomic_add_fetch_64((int64_t *)&pActivity->numOfInsertsReq, 1); // no need to check return code
 
   (void)launchQueryImpl(info->pRequest, info->pQuery, true, NULL);  // no need to check return code
 
@@ -1921,7 +1925,7 @@ int32_t smlClearForRerun(SSmlHandle *info) {
     info->lines = (SSmlLineInfo *)taosMemoryCalloc(info->lineNum, sizeof(SSmlLineInfo));
   }
 
-  memset(&info->preLine, 0, sizeof(SSmlLineInfo));
+  (void)memset(&info->preLine, 0, sizeof(SSmlLineInfo));
   info->currSTableMeta = NULL;
   info->currTableDataCtx = NULL;
 
@@ -1951,7 +1955,7 @@ static bool getLine(SSmlHandle *info, char *lines[], char **rawLine, char *rawLi
 
   if (*rawLine != NULL && (uDebugFlag & DEBUG_DEBUG)) {
     char *print = taosMemoryCalloc(*len + 1, 1);
-    memcpy(print, *tmp, *len);
+    (void)memcpy(print, *tmp, *len);
     uDebug("SML:0x%" PRIx64 " smlParseLine is raw, numLines:%d, protocol:%d, len:%d, data:%s", info->id, numLines,
            info->protocol, *len, print);
     taosMemoryFree(print);
@@ -2114,7 +2118,7 @@ void smlSetReqSQL(SRequestObj *request, char *lines[], char *rawLine, char *rawL
       uError("malloc %d for sml sql failed", rlen + 1);
       return;
     }
-    memcpy(sql, p, rlen);
+    (void)memcpy(sql, p, rlen);
     sql[rlen] = 0;
 
     request->sqlstr = sql;
diff --git a/source/client/src/clientSmlJson.c b/source/client/src/clientSmlJson.c
index b0348b4f91..14d6a95e22 100644
--- a/source/client/src/clientSmlJson.c
+++ b/source/client/src/clientSmlJson.c
@@ -472,7 +472,11 @@ static int32_t smlParseValueFromJSON(cJSON *root, SSmlKv *kv) {
       break;
     }
     case cJSON_String: {
-      smlConvertJSONString(kv, "binary", root);
+      int32_t ret = smlConvertJSONString(kv, "binary", root);
+      if (ret != TSDB_CODE_SUCCESS) {
+        uError("OTD:Failed to parse binary value from JSON Obj");
+        return ret;
+      }
       break;
     }
     case cJSON_Object: {
@@ -521,7 +525,9 @@ static int32_t smlProcessTagJson(SSmlHandle *info, cJSON *tags){
     if (unlikely(ret != TSDB_CODE_SUCCESS)) {
       return ret;
     }
-    taosArrayPush(preLineKV, &kv);
+    if (taosArrayPush(preLineKV, &kv) == NULL) {
+      return TSDB_CODE_OUT_OF_MEMORY;
+    }
 
     if (info->dataFormat && !isSmlTagAligned(info, cnt, &kv)) {
       return TSDB_CODE_TSC_INVALID_JSON;
diff --git a/source/client/src/clientSmlLine.c b/source/client/src/clientSmlLine.c
index f2443080a6..3456b7df17 100644
--- a/source/client/src/clientSmlLine.c
+++ b/source/client/src/clientSmlLine.c
@@ -152,7 +152,7 @@ int32_t smlParseValue(SSmlKv *pVal, SSmlMsgBuf *msg) {
         if(data == NULL){
           return TSDB_CODE_OUT_OF_MEMORY;
         }
-        memcpy(data, pVal->value + (NCHAR_ADD_LEN - 1), pVal->length);
+        (void)memcpy(data, pVal->value + (NCHAR_ADD_LEN - 1), pVal->length);
         pVal->value = data;
       }
 
diff --git a/source/client/src/clientSmlTelnet.c b/source/client/src/clientSmlTelnet.c
index ddd2cf5ad0..a25ef4ec95 100644
--- a/source/client/src/clientSmlTelnet.c
+++ b/source/client/src/clientSmlTelnet.c
@@ -131,7 +131,9 @@ static int32_t smlProcessTagTelnet(SSmlHandle *info, char *data, char *sqlEnd){
         .length = valueLen,
         .keyEscaped = false,
         .valueEscaped = false};
-    taosArrayPush(preLineKV, &kv);
+    if (taosArrayPush(preLineKV, &kv) == NULL){
+      return TSDB_CODE_OUT_OF_MEMORY;
+    }
     if (info->dataFormat && !isSmlTagAligned(info, cnt, &kv)) {
       return TSDB_CODE_SML_INVALID_DATA;
     }