From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87D21C433E1 for ; Wed, 22 Jul 2020 06:03:02 +0000 (UTC) Received: from isis.lip6.fr (isis.lip6.fr [132.227.60.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 09ABA20771 for ; Wed, 22 Jul 2020 06:03:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 09ABA20771 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=inria.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=cocci-bounces@systeme.lip6.fr Received: from systeme.lip6.fr (systeme.lip6.fr [132.227.104.7]) by isis.lip6.fr (8.15.2/8.15.2) with ESMTP id 06M62gTi015523; Wed, 22 Jul 2020 08:02:42 +0200 (CEST) Received: from systeme.lip6.fr (systeme.lip6.fr [127.0.0.1]) by systeme.lip6.fr (Postfix) with ESMTP id 44C2D7775; Wed, 22 Jul 2020 08:02:42 +0200 (CEST) Received: from isis.lip6.fr (isis.lip6.fr [132.227.60.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by systeme.lip6.fr (Postfix) with ESMTPS id E770C3F6C for ; Wed, 22 Jul 2020 08:02:39 +0200 (CEST) Received: from mail3-relais-sop.national.inria.fr (mail3-relais-sop.national.inria.fr [192.134.164.104]) by isis.lip6.fr (8.15.2/8.15.2) with ESMTPS id 06M62cpZ007143 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Wed, 22 Jul 2020 08:02:38 +0200 (CEST) X-IronPort-AV: E=Sophos;i="5.75,381,1589234400"; d="scan'208";a="354990745" Received: from abo-173-121-68.mrs.modulonet.fr (HELO hadrien) ([85.68.121.173]) by mail3-relais-sop.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Jul 2020 08:02:37 +0200 Date: Wed, 22 Jul 2020 08:02:37 +0200 (CEST) From: Julia Lawall X-X-Sender: jll@hadrien To: Markus Elfring In-Reply-To: <0b326e2b-723c-3482-c0ef-5d6592a9c6cb@web.de> Message-ID: References: <0b326e2b-723c-3482-c0ef-5d6592a9c6cb@web.de> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="8323329-416411769-1595397758=:2918" X-Greylist: Sender IP whitelisted, Sender e-mail whitelisted, not delayed by milter-greylist-4.4.3 (isis.lip6.fr [132.227.60.2]); Wed, 22 Jul 2020 08:02:43 +0200 (CEST) X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.4.3 (isis.lip6.fr [132.227.60.2]); Wed, 22 Jul 2020 08:02:38 +0200 (CEST) X-Scanned-By: MIMEDefang 2.78 on 132.227.60.2 X-Scanned-By: MIMEDefang 2.78 on 132.227.60.2 Cc: Michal Marek , Gilles Muller , kernel-janitors@vger.kernel.org, Nicolas Palix , linux-kernel@vger.kernel.org, Coccinelle Subject: Re: [Cocci] [PATCH v3 2/3] coccinelle: api: extend memdup_user rule with vmemdup_user() X-BeenThere: cocci@systeme.lip6.fr X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cocci-bounces@systeme.lip6.fr Errors-To: cocci-bounces@systeme.lip6.fr This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --8323329-416411769-1595397758=:2918 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT On Wed, 22 Jul 2020, Markus Elfring wrote: > >>> +@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. > > How do you think about to check run time characteristics for > the following SmPL script sketches? > > A) > @R1@ > @@ > // Change something > > @R2@ > @@ > // Change another thing > > > B) > @Replacement_with_disjunction@ > @@ > ( > // R1: Change something > | > // R2: Change another thing > ) Markus, you are welcome to try this since you are concerned about it. But it doesn't matter. julia > > > >>> +@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? > > > > This is fine as is in all three aspects. > > Is every technique from the Coccinelle software required for > each operation mode in such data processing approaches? > > Regards, > Markus > --8323329-416411769-1595397758=:2918 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci --8323329-416411769-1595397758=:2918--