From patchwork Wed Aug 18 06:05:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 12443209 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 71170C4320E for ; Wed, 18 Aug 2021 06:19:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5F0B760F35 for ; Wed, 18 Aug 2021 06:19:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238762AbhHRGU1 (ORCPT ); Wed, 18 Aug 2021 02:20:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45662 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240293AbhHRGRd (ORCPT ); Wed, 18 Aug 2021 02:17:33 -0400 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E6E38C028C31 for ; Tue, 17 Aug 2021 23:14:25 -0700 (PDT) Received: by mail-pj1-x102f.google.com with SMTP id m24-20020a17090a7f98b0290178b1a81700so1615275pjl.4 for ; Tue, 17 Aug 2021 23:14:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Hcl1ccbFJs4ud/H3xoT9ZSR2o1n+o5k4Vuh9ApRTkZE=; b=X+6d81/MvLfT3RwS/Jq3LliSZFdydCpZduBL+K5p5bTjFlP//w2o7lGFMk764ByK2j 4XbCrV8JHtasAStK7sUNoD/ilVbmVoDcq6+ER+OvyegySoWauDTXTIy6SbVa851KB7Q1 KUnRDP7SH/0Kg/x5GtujVKZ0O006edjI9Mme8= 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=Hcl1ccbFJs4ud/H3xoT9ZSR2o1n+o5k4Vuh9ApRTkZE=; b=QyaJA+FnhRYF/K9bLulvk5L6peN/Tx5hCFXJwbQwLilX2SFClSj+MAsAm2NcAi6z1i tFqu/Ei4r1t/BvpopgcjwTmlfOW/PMuF3RkT5epYWinlHw29k2FI64utWuVwQb1uVvPu 5zADrphZWHsTDWZKPH7KzaG/BfUcC585zeqER74khGPiydxE9NbDoKxgMUOUXHnzJSbr 3KNgy3eZcdXvVIvOUIBu5blMlO9TMlwgcKkyPuIN4nqCbHyvZdHnOGNvOMJ8HXWxqDV6 qzyYmjOzZDPUHsWmhS4z4ClgL+p8hvkRlk/kQEGmInsraewzjDdsi0DROvz0ety2gbv7 yprA== X-Gm-Message-State: AOAM533AO0Q98Hma460JaDJaYB5/uT8QH+92ofPBxQuwo5HZsLh+cngn x+j8CO+tMWuaUSbO0wqbxvdG/w== X-Google-Smtp-Source: ABdhPJyVdGO+k0ZXLSuBZU6Emb1T8tVPxMBOZys/2ngcwdzE26txO/yjwg2d2fDStsZ38dVCxGAyrA== X-Received: by 2002:a17:90b:2313:: with SMTP id mt19mr7827471pjb.230.1629267265564; Tue, 17 Aug 2021 23:14:25 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id j23sm3858038pjn.12.2021.08.17.23.14.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Aug 2021 23:14:21 -0700 (PDT) From: Kees Cook To: linux-kernel@vger.kernel.org Cc: Kees Cook , Leon Romanovsky , Doug Ledford , Jason Gunthorpe , linux-rdma@vger.kernel.org, "Gustavo A. R. Silva" , Greg Kroah-Hartman , Andrew Morton , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev, linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com, Rasmus Villemoes , linux-hardening@vger.kernel.org Subject: [PATCH v2 56/63] RDMA/mlx5: Use struct_group() to zero struct mlx5_ib_mr Date: Tue, 17 Aug 2021 23:05:26 -0700 Message-Id: <20210818060533.3569517-57-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210818060533.3569517-1-keescook@chromium.org> References: <20210818060533.3569517-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1421; h=from:subject; bh=VDjxwOfX2cjaEibL8dkCGTlxM9AleppD3q/+715fBPc=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhHKMq8O5UKAKpb/rvp5Y2SurRHZONXPPy2R7JrBHQ 07WmcZaJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYRyjKgAKCRCJcvTf3G3AJqH3D/ 4gNGySY8SCnjrDzEUM7CyrdchqF//a5m2rqxinozby7V9IS5+ycLOFfGvEx1AbtsgpvkKu6IjRZUA5 U67OxhqHOeDoB2W0JrzMD4ZiEf7aeNYRL/FcCw1nfsLjyJUn/7TFORuKQzen2TzINw05zF7xASgg/i xaqv+EuCKtewRoiXcWah1s7jrT1+hp4WtAkQzn/+YaIOVXblb9eHzxMGHhaGDiVNUWryg50fZiOvzo syChMqPaE84IoJx1X3nrdGMbSgJMU0FmsGXcNzY1ouOxqnAlCdt78oxn0N/v+Iddyi/oJlPfrrkCFW zTE3FtjwfhE243hFenyrDn/NEq85myRaQoC3GPPw9uiO1gSwK5OxTciBWBWEY9hT8f55X/K1hRf7Dx z/+mVftkYQIBCPASioBF7UrH+t8vHnUbHcJrYUXmmKNFE8Ki+9oeB0OLJaSo/Yw6PdoabOW4EplCRJ oGAyyzxgxgNTQUYlJOMczrc1z9W3IFlWitdqcPrmsHApkLxRvze0yN1bBp2+BP8kp5Sul0WwUPwAOF gCblqx3UOeJuqqaMUUha9/HfetNzO8oyaLg80znWlEWSXZcMWHgubHnQLVPMv7nqUCEbhdDoN09B46 k0l6F+LB0Ns/6YfKNGhM3NCkF2iuaqgxu0NW66r4tv309D5se4J8ucLMUhmQ== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org In preparation for FORTIFY_SOURCE performing compile-time and run-time field bounds checking for memset(), avoid intentionally writing across neighboring fields. Add struct_group() to mark region of struct mlx5_ib_mr that should be initialized to zero. Cc: Leon Romanovsky Cc: Doug Ledford Cc: Jason Gunthorpe Cc: linux-rdma@vger.kernel.org Signed-off-by: Kees Cook --- drivers/infiniband/hw/mlx5/mlx5_ib.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index bf20a388eabe..f63bf204a7a1 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -644,6 +644,7 @@ struct mlx5_ib_mr { struct ib_umem *umem; /* This is zero'd when the MR is allocated */ + struct_group(cleared, union { /* Used only while the MR is in the cache */ struct { @@ -691,12 +692,13 @@ struct mlx5_ib_mr { bool is_odp_implicit; }; }; + ); }; /* Zero the fields in the mr that are variant depending on usage */ static inline void mlx5_clear_mr(struct mlx5_ib_mr *mr) { - memset(mr->out, 0, sizeof(*mr) - offsetof(struct mlx5_ib_mr, out)); + memset(&mr->cleared, 0, sizeof(mr->cleared)); } static inline bool is_odp_mr(struct mlx5_ib_mr *mr)