diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index f2739c9ab892a5a895e45ca714dee7d467615023..2c48eae59f7ba412759c6aa94b75ba8171dc1b12 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -1372,8 +1372,14 @@ static int32_t smlKvTimeArrayCompare(const void *key1, const void *key2) {
 static int32_t smlKvTimeHashCompare(const void *key1, const void *key2) {
   SHashObj *s1 = *(SHashObj **)key1;
   SHashObj *s2 = *(SHashObj **)key2;
-  SSmlKv   *kv1 = *(SSmlKv **)taosHashGet(s1, TS, TS_LEN);
-  SSmlKv   *kv2 = *(SSmlKv **)taosHashGet(s2, TS, TS_LEN);
+  SSmlKv   **kv1pp = (SSmlKv **)taosHashGet(s1, TS, TS_LEN);
+  SSmlKv   **kv2pp = (SSmlKv **)taosHashGet(s2, TS, TS_LEN);
+  if(!kv1pp || !kv2pp){
+    uError("smlKvTimeHashCompare kv is null");
+    return -1;
+  }
+  SSmlKv   *kv1 = *kv1pp;
+  SSmlKv   *kv2 = *kv2pp;
   if(!kv1 || kv1->type != TSDB_DATA_TYPE_TIMESTAMP){
     uError("smlKvTimeHashCompare kv1");
     return -1;
diff --git a/utils/test/c/sml_test.c b/utils/test/c/sml_test.c
index f7fd59cd7ba4a6b5208acce53b2d96dd10bb7586..ab520e66387f9b7644d9dd64aeb1ae811d97fcf5 100644
--- a/utils/test/c/sml_test.c
+++ b/utils/test/c/sml_test.c
@@ -102,27 +102,8 @@ int smlProcess_json1_Test() {
   taos_free_result(pRes);
 
   const char *sql[] = {
-      "["
-      "    {"
-      "        \"metric\": \"sys.cpu.nice\","
-      "        \"timestamp\": 0,"
-      "        \"value\": 18,"
-      "        \"tags\": {"
-      "           \"host\": \"web01\","
-      "           \"id\": \"t1\","
-      "           \"dc\": \"lga\""
-      "        }"
-      "    },"
-      "    {"
-      "        \"metric\": \"sys.cpu.nice\","
-      "        \"timestamp\": 1662344042,"
-      "        \"value\": 9,"
-      "        \"tags\": {"
-      "           \"host\": \"web02\","
-      "           \"dc\": \"lga\""
-      "        }"
-      "    }"
-      "]",};
+      "[{\"metric\":\"sys.cpu.nice\",\"timestamp\":0,\"value\":18,\"tags\":{\"host\":\"web01\",\"id\":\"t1\",\"dc\":\"lga\"}},{\"metric\":\"sys.cpu.nice\",\"timestamp\":1662344042,\"value\":9,\"tags\":{\"host\":\"web02\",\"dc\":\"lga\"}}]"
+  };
   pRes = taos_schemaless_insert(taos, (char **)sql, sizeof(sql) / sizeof(sql[0]), TSDB_SML_JSON_PROTOCOL,
                                 TSDB_SML_TIMESTAMP_NANO_SECONDS);
   printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
@@ -143,28 +124,8 @@ int smlProcess_json2_Test() {
   taos_free_result(pRes);
 
   const char *sql[] = {
-      "{"
-      "    \"metric\": \"meter_current0\","
-      "    \"timestamp\": {"
-      "        \"value\"  : 1662344042,"
-      "        \"type\"   : \"s\""
-      "    },"
-      "    \"value\": {"
-      "         \"value\" : 10.3,"
-      "         \"type\"  : \"i64\""
-      "    },"
-      "    \"tags\": {"
-      "       \"groupid\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"bigint\""
-      "       },"
-      "       \"location\": { "
-      "           \"value\" : \"北京\","
-      "           \"type\"  : \"binary\""
-      "       },"
-      "       \"id\": \"d1001\""
-      "    }"
-      "}",};
+      "{\"metric\":\"meter_current0\",\"timestamp\":{\"value\":1662344042,\"type\":\"s\"},\"value\":{\"value\":10.3,\"type\":\"i64\"},\"tags\":{\"groupid\":{\"value\":2,\"type\":\"bigint\"},\"location\":{\"value\":\"北京\",\"type\":\"binary\"},\"id\":\"d1001\"}}"
+  };
   pRes = taos_schemaless_insert(taos, (char **)sql, sizeof(sql) / sizeof(sql[0]), TSDB_SML_JSON_PROTOCOL,
                                 TSDB_SML_TIMESTAMP_NANO_SECONDS);
   printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
@@ -185,56 +146,7 @@ int smlProcess_json3_Test() {
   taos_free_result(pRes);
 
   const char *sql[] = {
-      "{"
-      "    \"metric\": \"meter_current1\","
-      "    \"timestamp\": {"
-      "        \"value\"  : 1662344042,"
-      "        \"type\"   : \"s\""
-      "    },"
-      "    \"value\": {"
-      "         \"value\" : 10.3,"
-      "         \"type\"  : \"i64\""
-      "    },"
-      "    \"tags\": {"
-      "       \"t1\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"bigint\""
-      "       },"
-      "       \"t2\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"int\""
-      "       },"
-      "       \"t3\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"i16\""
-      "       },"
-      "       \"t4\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"i8\""
-      "       },"
-      "       \"t5\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"f32\""
-      "       },"
-      "       \"t6\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"double\""
-      "       },"
-      "       \"t7\": { "
-      "           \"value\" : \"8323\","
-      "           \"type\"  : \"binary\""
-      "       },"
-      "       \"t8\": { "
-      "           \"value\" : \"北京\","
-      "           \"type\"  : \"nchar\""
-      "       },"
-      "       \"t9\": { "
-      "           \"value\" : true,"
-      "           \"type\"  : \"bool\""
-      "       },"
-      "       \"id\": \"d1001\""
-      "    }"
-      "}",};
+      "{\"metric\":\"meter_current1\",\"timestamp\":{\"value\":1662344042,\"type\":\"s\"},\"value\":{\"value\":10.3,\"type\":\"i64\"},\"tags\":{\"t1\":{\"value\":2,\"type\":\"bigint\"},\"t2\":{\"value\":2,\"type\":\"int\"},\"t3\":{\"value\":2,\"type\":\"i16\"},\"t4\":{\"value\":2,\"type\":\"i8\"},\"t5\":{\"value\":2,\"type\":\"f32\"},\"t6\":{\"value\":2,\"type\":\"double\"},\"t7\":{\"value\":\"8323\",\"type\":\"binary\"},\"t8\":{\"value\":\"北京\",\"type\":\"nchar\"},\"t9\":{\"value\":true,\"type\":\"bool\"},\"id\":\"d1001\"}}"};
   pRes = taos_schemaless_insert(taos, (char **)sql, sizeof(sql) / sizeof(sql[0]), TSDB_SML_JSON_PROTOCOL,
                                 TSDB_SML_TIMESTAMP_NANO_SECONDS);
   printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
@@ -255,47 +167,8 @@ int smlProcess_json4_Test() {
   taos_free_result(pRes);
 
   const char *sql[] = {
-      "{"
-      "    \"metric\": \"meter_current2\","
-      "    \"timestamp\": {"
-      "        \"value\"  : 1662344042000,"
-      "        \"type\"   : \"ms\""
-      "    },"
-      "    \"value\": \"ni\","
-      "    \"tags\": {"
-      "       \"t1\": { "
-      "           \"value\" : 20,"
-      "           \"type\"  : \"i64\""
-      "       },"
-      "       \"t2\": { "
-      "           \"value\" : 25,"
-      "           \"type\"  : \"i32\""
-      "       },"
-      "       \"t3\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"smallint\""
-      "       },"
-      "       \"t4\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"tinyint\""
-      "       },"
-      "       \"t5\": { "
-      "           \"value\" : 2,"
-      "           \"type\"  : \"float\""
-      "       },"
-      "       \"t6\": { "
-      "           \"value\" : 0.2,"
-      "           \"type\"  : \"f64\""
-      "       },"
-      "       \"t7\": \"nsj\","
-      "       \"t8\": { "
-      "           \"value\" : \"北京\","
-      "           \"type\"  : \"nchar\""
-      "       },"
-      "       \"t9\": false,"
-      "       \"id\": \"d1001\""
-      "    }"
-      "}",};
+      "{\"metric\":\"meter_current2\",\"timestamp\":{\"value\":1662344042000,\"type\":\"ms\"},\"value\":\"ni\",\"tags\":{\"t1\":{\"value\":20,\"type\":\"i64\"},\"t2\":{\"value\":25,\"type\":\"i32\"},\"t3\":{\"value\":2,\"type\":\"smallint\"},\"t4\":{\"value\":2,\"type\":\"tinyint\"},\"t5\":{\"value\":2,\"type\":\"float\"},\"t6\":{\"value\":0.2,\"type\":\"f64\"},\"t7\":\"nsj\",\"t8\":{\"value\":\"北京\",\"type\":\"nchar\"},\"t9\":false,\"id\":\"d1001\"}}"
+  };
   pRes = taos_schemaless_insert(taos, (char **)sql, sizeof(sql) / sizeof(sql[0]), TSDB_SML_JSON_PROTOCOL,
                                 TSDB_SML_TIMESTAMP_NANO_SECONDS);
   printf("%s result:%s\n", __FUNCTION__, taos_errstr(pRes));
diff --git a/utils/test/c/tmqDemo.c b/utils/test/c/tmqDemo.c
index 784b45c92bcb2b1b8e30cfdd7d60b31f279e2e8d..d105b505793eae17068af9e9db02eff5071f5bd4 100644
--- a/utils/test/c/tmqDemo.c
+++ b/utils/test/c/tmqDemo.c
@@ -130,15 +130,15 @@ void parseArgument(int32_t argc, char* argv[]) {
       printHelp();
       exit(0);
     } else if (strcmp(argv[i], "-d") == 0) {
-      strcpy(g_stConfInfo.dbName, argv[++i]);
+      tstrncpy(g_stConfInfo.dbName, argv[++i], sizeof(g_stConfInfo.dbName));
     } else if (strcmp(argv[i], "-c") == 0) {
-      strcpy(configDir, argv[++i]);
+      tstrncpy(configDir, argv[++i], PATH_MAX);
     } else if (strcmp(argv[i], "-s") == 0) {
-      strcpy(g_stConfInfo.stbName, argv[++i]);
+      tstrncpy(g_stConfInfo.stbName, argv[++i], sizeof(g_stConfInfo.stbName));
     } else if (strcmp(argv[i], "-w") == 0) {
-      strcpy(g_stConfInfo.vnodeWalPath, argv[++i]);
+      tstrncpy(g_stConfInfo.vnodeWalPath, argv[++i], sizeof(g_stConfInfo.vnodeWalPath));
     } else if (strcmp(argv[i], "-f") == 0) {
-      strcpy(g_stConfInfo.resultFileName, argv[++i]);
+      tstrncpy(g_stConfInfo.resultFileName, argv[++i], sizeof(g_stConfInfo.resultFileName));
     } else if (strcmp(argv[i], "-t") == 0) {
       g_stConfInfo.numOfThreads = atoi(argv[++i]);
     } else if (strcmp(argv[i], "-n") == 0) {
diff --git a/utils/test/c/tmqSim.c b/utils/test/c/tmqSim.c
index d36fe0855aa92fa4e052526d558faf12bf4e78c7..25e83363ee03052a4fa15b16a12af4593f0aad04 100644
--- a/utils/test/c/tmqSim.c
+++ b/utils/test/c/tmqSim.c
@@ -949,7 +949,7 @@ void parseConsumeInfo() {
     token = strtok(g_stConfInfo.stThreads[i].topicString, delim);
     while (token != NULL) {
       // printf("%s\n", token );
-      strcpy(g_stConfInfo.stThreads[i].topics[g_stConfInfo.stThreads[i].numOfTopic], token);
+      tstrncpy(g_stConfInfo.stThreads[i].topics[g_stConfInfo.stThreads[i].numOfTopic], token, sizeof(g_stConfInfo.stThreads[i].topics[g_stConfInfo.stThreads[i].numOfTopic]));
       ltrim(g_stConfInfo.stThreads[i].topics[g_stConfInfo.stThreads[i].numOfTopic]);
       // printf("%s\n", g_stConfInfo.topics[g_stConfInfo.numOfTopic]);
       g_stConfInfo.stThreads[i].numOfTopic++;