Merge pull request #18850 from taosdata/fix/udfdCrash

fix: fix udfd crash

source/libs/transport/src/transCli.c

@@ -285,6 +285,7 @@ static void cliReleaseUnfinishedMsg(SCliConn* conn) {
     }
     destroyCmsg(msg);
   }
+  memset(&conn->ctx, 0, sizeof(conn->ctx));
 }
 bool cliMaySendCachedMsg(SCliConn* conn) {
   if (!transQueueEmpty(&conn->cliMsgs)) {

source/libs/transport/src/transComm.c

@@ -282,6 +282,9 @@ void transCtxCleanup(STransCtx* ctx) {
 }
 
 void transCtxMerge(STransCtx* dst, STransCtx* src) {
+  if (src->args == NULL || src->freeFunc == NULL) {
+    return;
+  }
   if (dst->args == NULL) {
     dst->args = src->args;
     dst->brokenVal = src->brokenVal;