Ticket #13575: 13575.5.diff

src/wp-admin/includes/template-functions.php

@@ -821 +821 @@
          * @param int $max_upload_size Allowed upload size. Default 1 MB.
          */
         $bytes = apply_filters( 'import_upload_size_limit', wp_max_upload_size() );
+
+        if ( function_exists( 'memory_get_usage' ) ) {
+                $current = ini_get( 'memory_limit' );
+                ini_restore( 'memory_limit' );
+                $memory_limit = ini_set( 'memory_limit',  $current );
+                $m_bytes = size_format( $memory_limit );
+                $bytes = ( -1 === $m_bytes ) ? $bytes : min( $bytes, $m_bytes );
+        }
+
         $size = size_format( $bytes );
         $upload_dir = wp_upload_dir();
         if ( ! empty( $upload_dir['error'] ) ) :