From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3DA36C677FC for ; Thu, 11 Oct 2018 19:42:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0B6AF2075C for ; Thu, 11 Oct 2018 19:42:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0B6AF2075C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=isi.edu Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726907AbeJLDLU (ORCPT ); Thu, 11 Oct 2018 23:11:20 -0400 Received: from vapor.isi.edu ([128.9.64.64]:59252 "EHLO vapor.isi.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726054AbeJLDLT (ORCPT ); Thu, 11 Oct 2018 23:11:19 -0400 X-Greylist: delayed 328 seconds by postgrey-1.27 at vger.kernel.org; Thu, 11 Oct 2018 23:11:15 EDT Received: from jib.isi.edu (jib.isi.edu [128.9.136.190]) by vapor.isi.edu (8.13.8/8.13.8) with ESMTP id w9BJapGT025584; Thu, 11 Oct 2018 12:36:51 -0700 (PDT) Received: by jib.isi.edu (Postfix, from userid 1000) id 9845483C9B; Thu, 11 Oct 2018 12:36:51 -0700 (PDT) Date: Thu, 11 Oct 2018 12:36:51 -0700 From: Craig Milo Rogers To: Alan Cox Cc: hpa@zytor.com, linux-serial@vger.kernel.org, Linux Kernel Mailing List , Greg Kroah-Hartman , Jiri Slaby , Johan Hovold , Alexander Viro Subject: Re: Insanely high baud rates Message-ID: <20181011193651.GA11500@isi.edu> References: <3fcef1c1-d746-ae82-c0e6-f079b1a53ffb@zytor.com> <20181010211717.30c1f052@alans-desktop> <16D6AB22-697E-498C-A5B2-3AD90B567E86@zytor.com> <20181011133134.085624af@alans-desktop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181011133134.085624af@alans-desktop> User-Agent: Mutt/1.5.16 (2007-06-09) X-ISI-4-43-8-MailScanner: Found to be clean X-MailScanner-From: rogers@jib.isi.edu Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 18.10.11, Alan Cox wrote: > I mean - what is the baud rate of a pty ? Solaris made the distinction between B0, which means pty hangup mode, and any other baud rate: https://docs.oracle.com/cd/E88353_01/html/E37851/pty-4d.html But... why not implement a pty bandwidth limitation layer? You say, I need to justify it? It's for, uh... protecting the system from unrestricted pty usage DOS attacks! Yeah. That's what it's for. Craig Milo Rogers