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Date: Tue, 2 Jul 2019 10:25:04 -0700
From: Kees Cook <keescook@...omium.org>
To: Stephen Kitt <steve@....org>
Cc: Nitin Gote <nitin.r.gote@...el.com>, jannh@...gle.com,
kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH] checkpatch: Added warnings in favor of strscpy().
On Sat, Jun 29, 2019 at 06:15:37PM +0200, Stephen Kitt wrote:
> On Fri, 28 Jun 2019 17:25:48 +0530, Nitin Gote <nitin.r.gote@...el.com> wrote:
> > 1. Deprecate strcpy() in favor of strscpy().
>
> This isn’t a comment “against” this patch, but something I’ve been wondering
> recently and which raises a question about how to handle strcpy’s deprecation
> in particular. There is still one scenario where strcpy is useful: when GCC
> replaces it with its builtin, inline version...
>
> Would it be worth introducing a macro for strcpy-from-constant-string, which
> would check that GCC’s builtin is being used (when building with GCC), and
> fall back to strscpy otherwise?
How would you suggest it operate? A separate API, or something like the
existing overloaded strcpy() macros in string.h?
--
Kees Cook
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