fix: coverity issues

include/common/tmsg.h

@@ -343,6 +343,8 @@ typedef struct {
 } SSchemaWrapper;
 
 static FORCE_INLINE SSchemaWrapper* tCloneSSchemaWrapper(const SSchemaWrapper* pSchemaWrapper) {
+  if (pSchemaWrapper->pSchema == NULL) return NULL;
+
   SSchemaWrapper* pSW = (SSchemaWrapper*)taosMemoryMalloc(sizeof(SSchemaWrapper));
   if (pSW == NULL) return pSW;
   pSW->nCols = pSchemaWrapper->nCols;
@@ -352,6 +354,7 @@ static FORCE_INLINE SSchemaWrapper* tCloneSSchemaWrapper(const SSchemaWrapper* p
     taosMemoryFree(pSW);
     return NULL;
   }
+
   memcpy(pSW->pSchema, pSchemaWrapper->pSchema, pSW->nCols * sizeof(SSchema));
   return pSW;
 }

source/dnode/vnode/src/meta/metaEntry.c

@@ -21,7 +21,7 @@ int metaEncodeEntry(SEncoder *pCoder, const SMetaEntry *pME) {
   if (tEncodeI64(pCoder, pME->version) < 0) return -1;
   if (tEncodeI8(pCoder, pME->type) < 0) return -1;
   if (tEncodeI64(pCoder, pME->uid) < 0) return -1;
-  if (tEncodeCStr(pCoder, pME->name) < 0) return -1;
+  if (pME->name == NULL || tEncodeCStr(pCoder, pME->name) < 0) return -1;
 
   if (pME->type == TSDB_SUPER_TABLE) {
     if (tEncodeI8(pCoder, pME->flags) < 0) return -1;  // TODO: need refactor?

source/libs/tdb/src/db/tdbBtree.c

@@ -1094,6 +1094,7 @@ static int tdbBtreeEncodePayload(SPage *pPage, SCell *pCell, int nHeader, const
           // fetch next ofp, a new ofp and make it dirty
           ret = tdbFetchOvflPage(&pgno, &nextOfp, pTxn, pBt);
           if (ret < 0) {
+            tdbFree(pBuf);
             return -1;
           }
         }
@@ -1135,6 +1136,11 @@ static int tdbBtreeEncodePayload(SPage *pPage, SCell *pCell, int nHeader, const
         memcpy(pBuf, ((SCell *)pVal) + vLen - nLeft, bytes);
         memcpy(pBuf + bytes, &pgno, sizeof(pgno));
 
+        if (ofp == NULL) {
+          tdbFree(pBuf);
+          return -1;
+        }
+
         ret = tdbPageInsertCell(ofp, 0, pBuf, bytes + sizeof(pgno), 0);
         if (ret < 0) {
           tdbFree(pBuf);

source/libs/tdb/src/db/tdbPCache.c

@@ -105,7 +105,7 @@ static int tdbPCacheAlterImpl(SPCache *pCache, int32_t nPage) {
     for (int32_t iPage = pCache->nPages; iPage < nPage; iPage++) {
       if (tdbPageCreate(pCache->szPage, &aPage[iPage], tdbDefaultMalloc, NULL) < 0) {
         // TODO: handle error
-        tdbOsFree(pCache->aPage);
+        tdbOsFree(aPage);
         return -1;
       }