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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 6505DC433DF for ; Sat, 30 May 2020 20:54:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3C8B42074D for ; Sat, 30 May 2020 20:54:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729350AbgE3Uyb (ORCPT ); Sat, 30 May 2020 16:54:31 -0400 Received: from mail-lf1-f66.google.com ([209.85.167.66]:41495 "EHLO mail-lf1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728741AbgE3Uyb (ORCPT ); Sat, 30 May 2020 16:54:31 -0400 Received: by mail-lf1-f66.google.com with SMTP id u16so1710398lfl.8 for ; Sat, 30 May 2020 13:54:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=x1LVz2RKLdTewPVi7JzuKq6wTk2wWGIzWE4uj9Rz3Oo=; b=DxtupwfB7ZacQZz5oqXJI4KqRKhaPRtbiWp1cYTNJI+ebvkd3crdcF9JYxpAzWE78N WQ+j01tD79rrpwN/LUt7725KWiEQsIbrOkl38Hdy54hTEvk26cPci1JjiwqS02HKmoE4 GvKD7GfiPHIzYgXkx2lzZGjtvQs7EGBAizynO7fjbOSykHwpnNAzaZBAs8ktV/KgGhwt YriI0LL9GjpkHC7Ivn4PoTsrXZO8OE5E+2UXlhFCxLnUW73LjtP9lLrpcGw4wMKXsQqY 8/kffhgtUIxF9K0QzRbfV7pkxBNWdkZ1IF04G6fvpHUsAL2G1xe8MqKutJgmcReMdvu0 yPbw== X-Gm-Message-State: AOAM533IgSMgJ2Dfm/uh8I04bnKiU8szOCCvLd2e8LIVOBlU6K0+8b+4 oXrWG/ZuAJyxLjh5RbWWMBX1iLTU X-Google-Smtp-Source: ABdhPJy80CEmSIpmFE4qQC/NX9BXx1VXOkCwwIEjYO9wC7axPGWRTs6T7T71Vum0XD0dGpz+JcQCFQ== X-Received: by 2002:ac2:48a3:: with SMTP id u3mr7595076lfg.115.1590872068706; Sat, 30 May 2020 13:54:28 -0700 (PDT) Received: from localhost.localdomain ([213.87.147.196]) by smtp.googlemail.com with ESMTPSA id f6sm2816670ljn.91.2020.05.30.13.54.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 30 May 2020 13:54:28 -0700 (PDT) From: Denis Efremov To: Julia Lawall , Joe Perches Cc: Denis Efremov , cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] Coccinelle: extend memdup_user transformation with GFP_USER Date: Sat, 30 May 2020 23:53:47 +0300 Message-Id: <20200530205348.5812-2-efremov@linux.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200530205348.5812-1-efremov@linux.com> References: <20200530205348.5812-1-efremov@linux.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Match GFP_USER allocations with memdup_user.cocci rule. Commit 6c2c97a24f09 ("memdup_user(): switch to GFP_USER") switched memdup_user() from GFP_KERNEL to GFP_USER. In most cases it is still a good idea to use memdup_user() for GFP_KERNEL allocations. The motivation behind altering memdup_user() to GFP_USER is here: https://lkml.org/lkml/2018/1/6/333 Signed-off-by: Denis Efremov --- scripts/coccinelle/api/memdup_user.cocci | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/scripts/coccinelle/api/memdup_user.cocci b/scripts/coccinelle/api/memdup_user.cocci index c809ab10bbce..49f487e6a5c8 100644 --- a/scripts/coccinelle/api/memdup_user.cocci +++ b/scripts/coccinelle/api/memdup_user.cocci @@ -20,7 +20,7 @@ expression from,to,size; identifier l1,l2; @@ -- to = \(kmalloc\|kzalloc\)(size,GFP_KERNEL); +- to = \(kmalloc\|kzalloc\)(size,\(GFP_KERNEL\|GFP_USER\)); + to = memdup_user(from,size); if ( - to==NULL @@ -43,7 +43,7 @@ position p; statement S1,S2; @@ -* to = \(kmalloc@p\|kzalloc@p\)(size,GFP_KERNEL); +* to = \(kmalloc@p\|kzalloc@p\)(size,\(GFP_KERNEL\|GFP_USER\)); if (to==NULL || ...) S1 if (copy_from_user(to, from, size) != 0) S2 -- 2.26.2