Base: FileEnumerator should not follow reparse points.

base/files/file_enumerator_win.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/files/file_enumerator.h"
 
 #include <string.h>
 
 #include "base/logging.h"
 #include "base/threading/thread_restrictions.h"
@@ skipping 115 matching lines @@
     if (ShouldSkip(cur_file))
       continue;
 
     // Construct the absolute filename.
     cur_file = root_path_.Append(find_data_.cFileName);
 
     if (find_data_.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
       if (recursive_) {
         // If |cur_file| is a directory, and we are doing recursive searching,
         // add it to pending_paths_ so we scan it after we finish scanning this
-        // directory.
-        pending_paths_.push(cur_file);
+        // directory. However, don't do recursion through reparse points or we
+        // may end up with an infinite cycle.
+        if (!(find_data_.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT))
+          pending_paths_.push(cur_file);
       }
       if (file_type_ & FileEnumerator::DIRECTORIES)
         return cur_file;
     } else if (file_type_ & FileEnumerator::FILES) {
       return cur_file;
     }
   }
 
   return FilePath();
 }
 
 }  // namespace base