fix: init buf to avoid invalid write

source/common/src/tdatablock.c

@@ -1463,7 +1463,7 @@ static char* formatTimestamp(char* buf, int64_t val, int precision) {
 }
 
 void blockDebugShowData(const SArray* dataBlocks) {
-  char    pBuf[128];
+  char    pBuf[128] = {0};
   int32_t sz = taosArrayGetSize(dataBlocks);
   for (int32_t i = 0; i < sz; i++) {
     SSDataBlock* pDataBlock = taosArrayGet(dataBlocks, i);

source/common/src/ttime.c

@@ -783,7 +783,7 @@ int64_t taosTimeTruncate(int64_t t, const SInterval* pInterval, int32_t precisio
 //     2020-07-03 17:48:42
 // and the parameter can also be a variable.
 const char* fmtts(int64_t ts) {
-  static char buf[96];
+  static char buf[96] = {0};
   size_t      pos = 0;
   struct tm   tm;
 

source/dnode/mnode/impl/src/mndMain.c

@@ -370,7 +370,7 @@ int32_t mndProcessSyncMsg(SRpcMsg *pMsg) {
     return TAOS_SYNC_PROPOSE_OTHER_ERROR;
   }
  
-  char  logBuf[512];
+  char  logBuf[512] = {0};
   char *syncNodeStr = sync2SimpleStr(pMgmt->sync);
   snprintf(logBuf, sizeof(logBuf), "==vnodeProcessSyncReq== msgType:%d, syncNode: %s", pMsg->msgType, syncNodeStr);
   syncRpcMsgLog2(logBuf, pMsg);

source/libs/sync/src/syncMain.c

@@ -815,7 +815,7 @@ int32_t syncNodeSendMsgByInfo(const SNodeInfo* nodeInfo, SSyncNode* pSyncNode, S
 }
 
 cJSON* syncNode2Json(const SSyncNode* pSyncNode) {
-  char   u64buf[128];
+  char   u64buf[128] = {0};
   cJSON* pRoot = cJSON_CreateObject();
 
   if (pSyncNode != NULL) {

source/libs/sync/src/syncMessage.c

@@ -215,7 +215,7 @@ SyncTimeout* syncTimeoutFromRpcMsg2(const SRpcMsg* pRpcMsg) {
 }
 
 cJSON* syncTimeout2Json(const SyncTimeout* pMsg) {
-  char   u64buf[128];
+  char   u64buf[128] = {0};
   cJSON* pRoot = cJSON_CreateObject();
 
   if (pMsg != NULL) {