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Date: Fri, 20 Oct 2023 10:40:12 -0700
From: Justin Stitt <>
To: Christoph Hellwig <>
Cc: Kees Cook <>, Keith Busch <>, 
	Jens Axboe <>, Sagi Grimberg <>,,,,
Subject: Re: the nul-terminated string helper desk chair rearrangement

On Thu, Oct 19, 2023 at 9:46 PM Christoph Hellwig <> wrote:
> On Wed, Oct 18, 2023 at 11:01:54PM -0700, Kees Cook wrote:
> > Almost all of the remaining strncpy() usage is just string to string
> > copying, but the corner cases that are being spun out that aren't
> > strscpy() or strscpy_pad() are covered by strtomem(), kmemdup_nul(),
> > and memcpy(). Each of these are a clear improvement since they remove
> > the ambiguity of the intended behavior. Using seq_buf ends up being way
> > more overhead than is needed.
> I'm really not sure strscpy is much of an improvement.  In this particular
> case in most other places we simply use a snprintf for nqns, which seems
> useful here to if we don't want the full buf.
> But switching to a completely undocumented helper like strscpy seems not
> useful at all.

There's some docs at [1]. Perhaps there could be more?


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