diff --git a/contrib/test/craft/raftMain.c b/contrib/test/craft/raftMain.c
index 12be3deb2e33aba9be9b45acd1595a749ab1b2c5..e1c66422b3b90b23ff8c6f01cf07aa8adace5983 100644
--- a/contrib/test/craft/raftMain.c
+++ b/contrib/test/craft/raftMain.c
@@ -243,7 +243,7 @@ void console(SRaftServer *pRaftServer) {
 
 
 		} else if (strcmp(cmd, "dropnode") == 0) {
-			char host[HOST_LEN];
+			char host[HOST_LEN] = {0};
 			uint32_t port;
 			parseAddr(param1, host, HOST_LEN, &port);
 			uint64_t rid = raftId(host, port);
@@ -258,7 +258,7 @@ void console(SRaftServer *pRaftServer) {
 
 
 		} else if (strcmp(cmd, "put") == 0) {
-			char buf[256];
+			char buf[256] = {0};
 			snprintf(buf, sizeof(buf), "%s--%s", param1, param2);
 			putValue(&pRaftServer->raft, buf);
 
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index c7e4a848eba50146ae342f79a24d7a8e039e3626..74b6982008da95f55448b699e5896b86fefeb1b1 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -260,7 +260,7 @@ int vnodeProcessSyncReq(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
 
     SMsgHead *pHead = pMsg->pCont;
 
-    char  logBuf[512];
+    char  logBuf[512] = {0};
     char *syncNodeStr = sync2SimpleStr(pVnode->sync);
     snprintf(logBuf, sizeof(logBuf), "==vnodeProcessSyncReq== msgType:%d, syncNode: %s", pMsg->msgType, syncNodeStr);
     syncRpcMsgLog2(logBuf, pMsg);
diff --git a/source/dnode/vnode/src/vnd/vnodeSync.c b/source/dnode/vnode/src/vnd/vnodeSync.c
index 297792d8f8d78ed14de296141f5972c918e6453f..54aeac5799f5a0039cc90b0088255731bb3b4094 100644
--- a/source/dnode/vnode/src/vnd/vnodeSync.c
+++ b/source/dnode/vnode/src/vnd/vnodeSync.c
@@ -115,7 +115,7 @@ void vnodeSyncCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta)
     tmsgPutToQueue(&(pVnode->msgCb), APPLY_QUEUE, &applyMsg);
 
   } else {
-    char logBuf[256];
+    char logBuf[256] = {0};
     snprintf(logBuf, sizeof(logBuf),
              "==callback== ==CommitCb== do not execute, pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s, "
              "beginIndex :%ld\n",
@@ -126,7 +126,7 @@ void vnodeSyncCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta)
 }
 
 void vnodeSyncPreCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
-  char logBuf[256];
+  char logBuf[256] = {0};
   snprintf(logBuf, sizeof(logBuf),
            "==callback== ==PreCommitCb== pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s \n", pFsm, cbMeta.index,
            cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state));
@@ -134,7 +134,7 @@ void vnodeSyncPreCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMet
 }
 
 void vnodeSyncRollBackMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
-  char logBuf[256];
+  char logBuf[256] = {0};
   snprintf(logBuf, sizeof(logBuf), "==callback== ==RollBackCb== pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s \n",
            pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state));
   syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index 94b6d0a06cc381a8a09407445e7f54d8f2ce478a..353e94a49096822fe581d7faa0df8a29a6494c12 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -491,7 +491,7 @@ void taosDumpData(unsigned char *msg, int32_t len) {
   if (!osLogSpaceAvailable()) return;
   taosUpdateLogNums(DEBUG_DUMP);
 
-  char    temp[256];
+  char    temp[256] = {0};
   int32_t i, pos = 0, c = 0;
 
   for (i = 0; i < len; ++i) {
diff --git a/source/util/src/tstrbuild.c b/source/util/src/tstrbuild.c
index 2aae588046402e37569f5a2bde5ed5f72fa24346..c87b889e82ece82c251ddabad1964bc1f0b3ab2f 100644
--- a/source/util/src/tstrbuild.c
+++ b/source/util/src/tstrbuild.c
@@ -69,13 +69,13 @@ void taosStringBuilderAppendString(SStringBuilder* sb, const char* str) {
 void taosStringBuilderAppendNull(SStringBuilder* sb) { taosStringBuilderAppendStringLen(sb, "null", 4); }
 
 void taosStringBuilderAppendInteger(SStringBuilder* sb, int64_t v) {
-  char   buf[64];
+  char   buf[64] = {0};
   size_t len = snprintf(buf, sizeof(buf), "%" PRId64, v);
   taosStringBuilderAppendStringLen(sb, buf, TMIN(len, sizeof(buf)));
 }
 
 void taosStringBuilderAppendDouble(SStringBuilder* sb, double v) {
-  char   buf[512];
+  char   buf[512] = {0};
   size_t len = snprintf(buf, sizeof(buf), "%.9lf", v);
   taosStringBuilderAppendStringLen(sb, buf, TMIN(len, sizeof(buf)));
 }