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From: Markus Elfring <Markus.Elfring@web.de>
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 <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	Nicolas Palix <nicolas.palix@imag.fr>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: Re: [PATCH v3 2/3] coccinelle: api: extend memdup_user rule with vmemdup_user()
Date: Tue, 21 Jul 2020 11:30:08 +0200	[thread overview]
Message-ID: <e3d2ffb9-2a47-3d77-0501-9d48845435bd@web.de> (raw)

…
> +++ b/scripts/coccinelle/api/memdup_user.cocci
> @@ -39,6 +39,28 @@ …
…
> +@depends on patch@
> +expression from,to,size;
> +identifier l1,l2;
> +@@
> +
> +-  to = \(kvmalloc\|kvzalloc\)(size,\(GFP_KERNEL\|GFP_USER\));
> ++  to = vmemdup_user(from,size);

I propose to combine the desired adjustment with the previous SmPL rule
by using another disjunction.


> +@rv depends on !patch@
> +expression from,to,size;
> +position p;
> +statement S1,S2;
> +@@
> +
> +*  to = \(kvmalloc@p\|kvzalloc@p\)(size,\(GFP_KERNEL\|GFP_USER\));
> +   if (to==NULL || ...) S1
> +   if (copy_from_user(to, from, size) != 0)
> +   S2

* Can it be helpful to omit the SmPL asterisk functionality from
  the operation modes “org” and “report”?

* Should the operation mode “context” work without an extra position metavariable?

Regards,
Markus

             reply	other threads:[~2020-07-21  9:30 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-21  9:30 Markus Elfring [this message]
2020-07-21  9:58 ` Julia Lawall
2020-07-21 11:01   ` [v3 " Markus Elfring
2020-07-22  5:50   ` [PATCH v3 " Markus Elfring
2020-07-22  6:02     ` Julia Lawall
2020-07-22  6:09       ` [v3 " Markus Elfring
2020-07-22  6:24         ` Julia Lawall
2020-07-22  6:44           ` Markus Elfring
  -- strict thread matches above, loose matches on Subject: below --
2020-07-20 16:22 [PATCH v3 0/3] Update memdup_user.cocci Denis Efremov
2020-07-20 16:22 ` [PATCH v3 2/3] coccinelle: api: extend memdup_user rule with vmemdup_user() Denis Efremov

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