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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US 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, 17 Jun 2020 23:42:38 +0200 (CEST) X-Greylist: Sender DNS name whitelisted, not delayed by milter-greylist-4.4.3 (isis.lip6.fr [132.227.60.2]); Wed, 17 Jun 2020 23:42:37 +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: cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org Subject: Re: [Cocci] [PATCH v3] coccinelle: api: add kzfree script 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: cocci-bounces@systeme.lip6.fr Errors-To: cocci-bounces@systeme.lip6.fr >> +@rp_memset depends on patch@ >> +expression E, size; >> +position p : script:python() { relevant(p) }; >> +type T; >> +@@ >> + >> +- memset((T)E, size)@p; > > This is missing a 0 argument. > Thanks, I will send v4. > > >> + ... when != E >> + when strict >> +( >> +- kfree(E); >> ++ kzfree(E); >> +| >> +- \(vfree\|kvfree\)(E); >> ++ kvfree_sensitive(E, size); >> +) > > I'm not sure why you want kzfree in the first case, but kvfree_sensitive > in the second case. > As for now in kernel: memset(E,0,...) && kfree(E) is kzfree() There are no vzfree or kvzfree functions. Thus, we use kvfree_sensitive(). Maybe it's worth to wait for this patchset: https://lkml.org/lkml/2020/6/16/1163 With it the rule will use: ( - kfree(E); + kfree_sensitive(E); | - \(vfree\|kvfree\)(E); + kvfree_sensitive(E, size); ) Thanks, Denis _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci