linux-hardening - Re: [PATCH] seq_buf: Introduce DECLARE_SEQ_BUF and seq_buf

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Date: Fri, 27 Oct 2023 11:43:13 +0100
From: Matthew Wilcox <willy@...radead.org>
To: Kees Cook <keescook@...omium.org>
Cc: Steven Rostedt <rostedt@...dmis.org>, Christoph Hellwig <hch@....de>,
	Justin Stitt <justinstitt@...gle.com>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	Petr Mladek <pmladek@...e.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Sergey Senozhatsky <senozhatsky@...omium.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Arnd Bergmann <arnd@...db.de>, Jonathan Corbet <corbet@....net>,
	Yun Zhou <yun.zhou@...driver.com>,
	Jacob Keller <jacob.e.keller@...el.com>,
	Zhen Lei <thunder.leizhen@...wei.com>,
	linux-trace-kernel@...r.kernel.org,
	Yosry Ahmed <yosryahmed@...gle.com>, linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH] seq_buf: Introduce DECLARE_SEQ_BUF and seq_buf_cstr()

On Thu, Oct 26, 2023 at 10:54:26AM -0700, Kees Cook wrote:
> > > 	do_soemthing(seq_buf_cstr(s));
> > 
> > Do we really need to call it _cstr? Why not just have seq_buf_str() ?
> > 
> > I mean, this is C, do we need to state that in the name too?
> 
> I'm fine either way. I did that just to make the distinction between our
> length-managed string of characters interface (seq_buf), and the
> %NUL-terminated string of characters (traditionally called "C String" in
> other languages). And it was still shorter than "seq_buf_terminate(s);
> s->buffer" ;)

'cstr' might be short for 'counted string' ...