From: Joe Perches <joe@perches.com>
To: Kees Cook <keescook@chromium.org>, NitinGote <nitin.r.gote@intel.com>
Cc: corbet@lwn.net, akpm@linux-foundation.org, apw@canonical.com,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com
Subject: Re: [PATCH v5] Documentation/checkpatch: Prefer strscpy/strscpy_pad over strcpy/strlcpy/strncpy
Date: Mon, 22 Jul 2019 10:40:58 -0700 [thread overview]
Message-ID: <28404b52d58efa0a3e85ce05ce0b210049ed6050.camel@perches.com> (raw)
In-Reply-To: <201907221029.B0CBED4F@keescook>
On Mon, 2019-07-22 at 10:30 -0700, Kees Cook wrote:
> On Wed, Jul 17, 2019 at 10:00:05AM +0530, NitinGote wrote:
> > From: Nitin Gote <nitin.r.gote@intel.com>
> >
> > Added check in checkpatch.pl to
> > 1. Deprecate strcpy() in favor of strscpy().
> > 2. Deprecate strlcpy() in favor of strscpy().
> > 3. Deprecate strncpy() in favor of strscpy() or strscpy_pad().
> >
> > Updated strncpy() section in Documentation/process/deprecated.rst
> > to cover strscpy_pad() case.
> >
> > Signed-off-by: Nitin Gote <nitin.r.gote@intel.com>
>
> Reviewed-by: Kees Cook <keescook@chromium.org>
>
> Joe, does this address your checkpatch concerns?
Well, kinda.
strscpy_pad isn't used anywhere in the kernel.
And
+ "strncpy" => "strscpy, strscpy_pad or for non-NUL-terminated strings, strncpy() can still be used, but destinations should be marked with __nonstring",
is a bit verbose. This could be simply:
+ "strncpy" => "strscpy - for non-NUL-terminated uses, strncpy() dst should be __nonstring",
And I still prefer adding stracpy as it
reduces code verbosity and eliminates defects.
next prev parent reply other threads:[~2019-07-22 17:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-17 4:30 [PATCH v5] Documentation/checkpatch: Prefer strscpy/strscpy_pad over strcpy/strlcpy/strncpy NitinGote
2019-07-22 17:30 ` Kees Cook
2019-07-22 17:40 ` Joe Perches [this message]
2019-07-23 9:26 ` Gote, Nitin R
2019-07-24 18:17 ` Gote, Nitin R
2019-07-24 18:29 ` Joe Perches
2019-07-25 7:26 ` Gote, Nitin R
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=28404b52d58efa0a3e85ce05ce0b210049ed6050.camel@perches.com \
--to=joe@perches.com \
--cc=akpm@linux-foundation.org \
--cc=apw@canonical.com \
--cc=corbet@lwn.net \
--cc=keescook@chromium.org \
--cc=kernel-hardening@lists.openwall.com \
--cc=linux-doc@vger.kernel.org \
--cc=nitin.r.gote@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).