Merge branch '10.3' into 10.4

1 files changed, 5 insertions, 2 deletions

diff --git a/sql/sql_plugin.cc b/sql/sql_plugin.cc
index 4279cc25010..5fd3d0f0f6b 100644
--- a/sql/sql_plugin.cc
+++ b/sql/sql_plugin.cc
@@ -729,9 +729,9 @@ static st_plugin_dl *plugin_dl_add(const LEX_CSTRING *dl, myf MyFlags)
     This is done to ensure that only approved libraries from the
     plugin directory are used (to make this even remotely secure).
   */
-  if (check_valid_path(dl->str, dl->length) ||
-      check_string_char_length((LEX_CSTRING *) dl, 0, NAME_CHAR_LEN,
+  if (check_string_char_length((LEX_CSTRING *) dl, 0, NAME_CHAR_LEN,
                                system_charset_info, 1) ||
+      check_valid_path(dl->str, dl->length) ||
       plugin_dir_len + dl->length + 1 >= FN_REFLEN)
   {
     my_error(ER_UDF_NO_PATHS, MyFlags);
@@ -1846,6 +1846,9 @@ static void plugin_load(MEM_ROOT *tmp_root)
     LEX_CSTRING name= {str_name.ptr(), str_name.length()};
     LEX_CSTRING dl=   {str_dl.ptr(), str_dl.length()};
 
+    if (!name.length || !dl.length)
+      continue;
+
     /*
       there're no other threads running yet, so we don't need a mutex.
       but plugin_add() before is designed to work in multi-threaded