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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@lip6.fr>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	Michal Marek <michal.lkml@markovi.net>,
	Nicolas Palix <nicolas.palix@imag.fr>
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 2/4] coccinelle: api: extend memdup_user rule with vmemdup_user()
Date: Mon, 8 Jun 2020 20:32:07 +0200	[thread overview]
Message-ID: <6c9c6a4c-c305-ddab-8a1b-e4dc448d643f@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 suggest 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

How does the SmPL asterisk functionality fit to the operation
modes “org” and “report”?

Regards,
Markus

             reply	other threads:[~2020-06-08 18:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-08 18:32 Markus Elfring [this message]
2020-06-08 18:36 ` [PATCH v2 2/4] coccinelle: api: extend memdup_user rule with vmemdup_user() Julia Lawall
2020-06-08 19:24   ` Markus Elfring
  -- strict thread matches above, loose matches on Subject: below --
2020-06-08 15:00 [PATCH v2 0/4] Update memdup_user.cocci Denis Efremov
2020-06-08 15:00 ` [PATCH v2 2/4] coccinelle: api: extend memdup_user rule with vmemdup_user() Denis Efremov

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