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Message-ID: <b23889e2ba458736b3cf25e0c17a4598451e78d7.camel@perches.com>
Date: Thu, 25 Jul 2019 12:19:39 -0700
From: Joe Perches <joe@...ches.com>
To: Kees Cook <keescook@...omium.org>, NitinGote <nitin.r.gote@...el.com>
Cc: corbet@....net, akpm@...ux-foundation.org, apw@...onical.com,
linux-doc@...r.kernel.org, kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH v6] Documentation/checkpatch: Prefer stracpy over
strcpy/strlcpy/strncpy.
On Thu, 2019-07-25 at 11:50 -0700, Kees Cook wrote:
> On Thu, Jul 25, 2019 at 04:52:19PM +0530, NitinGote wrote:
> > From: Nitin Gote <nitin.r.gote@...el.com>
> >
> > Added check in checkpatch.pl to deprecate strcpy(), strlcpy() and
> > strncpy() in favor of stracpy().
>
> stracpy() is preferred when the destination is a char array (rather than
> a string pointer), so that likely needs to be clarified.
[]
> > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> > @@ -605,6 +605,20 @@ foreach my $entry (keys %deprecated_apis) {
> > }
> > $deprecated_apis_search = "(?:${deprecated_apis_search})";
> >
> > +our %deprecated_string_apis = (
> > + "strcpy" => "stracpy",
> > + "strlcpy" => "stracpy",
> > + "strncpy" => "stracpy - for non-NUL-terminated uses, strncpy dest should be __nonstring",
> > +);
Maybe:
our %deprecated_string_apis = (
"strcpy" => "stracpy or strscpy",
"strlcpy" => "stracpy or strscpy",
"strncpy" => "stracpy or strscpy - for non-NUL-terminated uses, strncpy dest should be __nonstring",
);
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