There is a memory leak in the program

[gly-hub]

When I use the following code in a program, it causes a memory leak. It's a strange phenomenon, as long as you comment out the upload logic.And the memory usage obtained by using pprof is inconsistent with the actual memory usage.

for path := range b.buff {
      file, err := os.Open(path)
      if err != nil {
	      su_logger.Error(context.Background(), err, fmt.Sprintf("Failed to open file:%s", path))
	      b.FileUnlock(path)
	      continue
      }
      ......
      uploader := s3manager.NewUploader(b.sess)
      _, err = uploader.Upload(&s3manager.UploadInput{
      Bucket: aws.String(global.GetConfig().AwsS3Config.Bucket),
      Key:    aws.String(strings.TrimLeft(path, "/backup")),
      Body:   file,
      })

     if err = file.Close(); err != nil {
	  su_logger.Error(context.Background(), err, fmt.Sprintf("Failed to close file: %s", path))
     }
}