Re: [PATCH v3] seq_buf: add seq_buf_strlen(), seq_buf_init_append(), seq_buf_puts_trunc()

[Kees Cook <kees@kernel.org>]

On September 16, 2026 6:13:59 PM PDT, Bill Wendling <morbo@google.com> wrote:
>Converting some strlcat() call sites seq_buf need behavior seq_buf
>doesn't currently provide, either directly or without introducing subtle
>bugs:

Ah, our implementations have crossed paths in flight. :)

> - seq_buf_strlen(): seq_buf_used() reports the full buffer size when

We agree, we need this one. :)


> - seq_buf_init_append(): seq_buf_init() always clears the buffer it's

Oh, nice, yeah this is cool. I'd like a different name that mentions "str"? Maybe _from_str?

> - seq_buf_puts_trunc(): seq_buf_puts() (like seq_buf_printf() and

I prefer my solution that just truncates and sets overflow. Nothing i found needed the non-trunc behavior.

I'll send a v2 of the other series with seq_buf_init_from_str?

-Kees

-- 
Kees Cook