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Cc:     linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
        "Gustavo A. R. Silva" <garsilva@embeddedor.com>,
        Kees Cook <keescook@chromium.org>
Subject: Re: [PATCH v4] coccinelle: misc: add array_size_dup script to detect
 missed overflow checks
From:   Markus Elfring <Markus.Elfring@web.de>
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To:     Denis Efremov <efremov@linux.com>,
        Coccinelle <cocci@systeme.lip6.fr>,
        Gilles Muller <Gilles.Muller@lip6.fr>,
        Julia Lawall <julia.lawall@inria.fr>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Michal Marek <michal.lkml@markovi.net>,
        Nicolas Palix <nicolas.palix@imag.fr>
Message-ID: <4014118b-90a6-68c5-048f-32485fa3e852@web.de>
Date:   Tue, 23 Jun 2020 08:12:39 +0200
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

> Changes in v2:
=E2=80=A6
> - assignment operator used

I prefer the distinction for the application of corresponding metavariable=
s.


> Changes in v3:
=E2=80=A6
>  - \(&E1\|&E2\) changed to &\(E1\|E2\)

Would it be more helpful to mention the movement of the ampersand
before SmPL disjunctions?


=E2=80=A6
>+/// Three types of patterns for these functions:

Will another adjustment be needed according to your information =E2=80=9Cd=
uplicates warning removed=E2=80=9D?


=E2=80=A6
> +virtual context
> +virtual report
> +virtual org

Can the following SmPL code variant ever become more attractive?

+virtual context, report, org


=E2=80=A6
> +expression subE1 <=3D as.E1;
> +expression subE2 <=3D as.E2;
> +expression as.E1, as.E2, E3;

How do you think about the following SmPL code variant?

+expression subE1 <=3D as.E1,
+           subE2 <=3D as.E2,
+           as.E1, as.E2, E3;


=E2=80=A6
> +msg =3D "WARNING: array_size is used later (line %s) to compute the sam=
e size" % (p2[0].line)
> +coccilib.report.print_report(p1[0], msg)

Please omit the extra Python variable =E2=80=9Cmsg=E2=80=9D for the passin=
g of such simple message objects.

What does hinder you to take the proposed script variants better into acco=
unt?

Regards,
Markus