Fix issue for N1N2 message transfer with curl multi

src/smf_app/smf_sbi.cpp

@@ -1173,10 +1173,10 @@ CURL* smf_sbi::curl_create_handle(
   // create handle for a curl request
   CURL* curl = curl_easy_init();
 
-  uint32_t str_len           = data.length();
-  char data_str[str_len + 1] = {};
-  data.copy(data_str, str_len);
-  data_str[str_len] = '\0';
+  uint32_t str_len = data.length();
+  char* data_str   = (char*) malloc(str_len + 1);
+  memset(data_str, 0, str_len + 1);
+  memcpy((void*) data_str, (void*) data.c_str(), str_len);
 
   if (curl) {
     curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
@@ -1192,6 +1192,8 @@ CURL* smf_sbi::curl_create_handle(
     curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, data.length());
     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data_str);
   }
+
+  free_wrapper((void**) &data_str);
   return curl;
 }