diff --git a/src/connection/connection.c b/src/connection/connection.c
index d5513191..08883974 100644
--- a/src/connection/connection.c
+++ b/src/connection/connection.c
@@ -857,7 +857,7 @@ static void conn_connect(neu_conn_t *conn)
         struct termios tty_opt = { 0 };
 #ifdef NEU_SMART_LINK
 #include "connection/neu_smart_link.h"
-        int ret =
+        ret =
             neu_conn_smart_link_auto_set(conn->param.params.tty_client.device);
         zlog_notice(conn->param.log, "smart link ret: %d", ret);
         if (ret > 0) {
diff --git a/src/connection/smart_link.c b/src/connection/smart_link.c
index 098e8bcc..3a6359a6 100644
--- a/src/connection/smart_link.c
+++ b/src/connection/smart_link.c
@@ -68,7 +68,7 @@ static int read_file(const char *path, char **buf)
     rewind(fp);
 
     *buf = calloc(1, size + 1);
-    if (buf == NULL) {
+    if (*buf == NULL) {
         fclose(fp);
         return -1;
     }