From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 51D7870 for ; Tue, 27 Jul 2021 21:16:57 +0000 (UTC) Received: by mail-pj1-f49.google.com with SMTP id j1so1858057pjv.3 for ; Tue, 27 Jul 2021 14:16:57 -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=SsQl9AGgDVz4dMjQrj5Kn4zFkC00P69ydvQa5XL3s70=; b=Rs6HYoDB8JCI5LZcFDXmByirUGKdsEtYf0xGfbcTHeZOr8iLIgjdfNm+fUHA8pOrtM dUxzT2LIMFv8uDeD3I7uQhaPpIzublFtLZaKhb6m8G+5wrXncTNkX9kgfHOyRoc8fGvX nUFj4adSWSn12tKJr3EXvjYqssUobHPHsIXqI= 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=SsQl9AGgDVz4dMjQrj5Kn4zFkC00P69ydvQa5XL3s70=; b=Ivnveue1plBNzOW/VyQ8wF/3hY4qALAhQUNdSVpaOMMsKqe3O7fvBV0lN2ZIN1fTuK PMSRg4RuuAHBqgA55O3mMGFPIBaD5yHgcjhUZ53ehc2C8JPI5HMVG9HFsm1P6yrpI32b d6vt0rGdrg97cTKGKck+sORJfYBCSbJYt33F2YdsV5p8MBbF596jI+ooTQsZ1un/Ykyi v2dS2Ba5eFWWhvAsyKXHFx1jNOs0q7tsd/b7k3uw/XFO9A8zivpFWS8jlSpcQnO/owYn sbQXM9tWFezEEZ9pBl22ywqcpZWlRIkNGvVhSZZOAsRSo4n4IHRufdAVkSCpvUMbMVyG VFcg== X-Gm-Message-State: AOAM531M9Ur6bkPlhB1uiXibW6n9R8zSuaMzjpu5xapZIG5A4i1Kw17X qn+N30AQSvR9Dtu2yE00g2TRog== X-Google-Smtp-Source: ABdhPJxHQnolGrNqUWuxT3TRrygeD/Y4uv8PYH40HLi8EsnsRtbjxlRySGM6XIllWkttnsKi9TCjpQ== X-Received: by 2002:a62:ce0f:0:b029:39a:a638:f25b with SMTP id y15-20020a62ce0f0000b029039aa638f25bmr10561280pfg.42.1627420616933; Tue, 27 Jul 2021 14:16:56 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id v10sm3566644pjd.29.2021.07.27.14.16.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jul 2021 14:16:54 -0700 (PDT) From: Kees Cook To: linux-hardening@vger.kernel.org Cc: Kees Cook , "Gustavo A. R. Silva" , Keith Packard , Greg Kroah-Hartman , Andrew Morton , linux-kernel@vger.kernel.org, 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 Subject: [PATCH 49/64] cm4000_cs: Use struct_group() to zero struct cm4000_dev region Date: Tue, 27 Jul 2021 13:58:40 -0700 Message-Id: <20210727205855.411487-50-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210727205855.411487-1-keescook@chromium.org> References: <20210727205855.411487-1-keescook@chromium.org> Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1505; h=from:subject; bh=pEaLYejpw1rouLzkWI/x3bS06fu+DrrD0bTA3jR4D24=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhAHOLvAh3w+r+2Msan2T2U4UOiQHuaUCBe1ciGiHP 57FYFAmJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYQBziwAKCRCJcvTf3G3AJoDND/ 49iXlS8sP97A+TuQ1hW5zJk7qY4Cq/D6b+K1NZSr+4oxO8lsE5F6t9Yp5H2qKpQDH3aG1Y9eseHUet DuqxELASm6TEbv9OaDETKL/st1lYW3XnzIdg4jtHyIUR7l5R/zIZWVCZjBklYrBtW+5MfFN8QuuF/F lvWawq3IPr3DCsm73XdFP6Bc1lZvICUNlEpP/HrD4TRKQi8UcHlSKwLWB74WqQx4AXq0BeprPCj2+K 42l0klkcuGwQNXyEcytxOhIx1zOxhcCTx0MIEflgGQVpkEiSYsDfzS1bJdn9uw6osxjKzg81OaNfq3 nTCOrIrEUVrjsW/YQShJRG1piOtrMFenXJVqU+berM3mVlnU+b+WDEDFNI+DLr5KX7D5l7IPFskN7l QyIaULkhJZ6CLvwzOoVY7vIlqZi9yNnUcfzAODBfpImwjzd2gLx/nV18ywN1M+ifdG3l0jjRTOV39w 4QYa5ZAzd0U/P351r3R8m8ZaiSHjEUVJeN1PD7EexenIxVofRslJik5zDpKZPpb133Y5HOZQsfajom cIz74vJI2Jk82zGIJHBlsHVUj9yJkvhh/o3qK0i/XCfm4ybkalh4dXPTiXC5ddEfdP/qhK66ovmt1y Gr7orTiLuQ3FhBQJUseFFY2YfzQgiCe7UUGAJJZGZ/PgkQ1TY0MyXJ3eMxkA== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit 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 cm4000_dev that should be initialized to zero. Signed-off-by: Kees Cook --- drivers/char/pcmcia/cm4000_cs.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c index 8f1bce0b4fe5..2f43e7088e16 100644 --- a/drivers/char/pcmcia/cm4000_cs.c +++ b/drivers/char/pcmcia/cm4000_cs.c @@ -116,8 +116,9 @@ struct cm4000_dev { wait_queue_head_t atrq; /* wait for ATR valid */ wait_queue_head_t readq; /* used by write to wake blk.read */ - /* warning: do not move this fields. + /* warning: do not move this struct group. * initialising to zero depends on it - see ZERO_DEV below. */ + struct_group(init, unsigned char atr_csum; unsigned char atr_len_retry; unsigned short atr_len; @@ -140,12 +141,10 @@ struct cm4000_dev { struct timer_list timer; /* used to keep monitor running */ int monitor_running; + ); }; -#define ZERO_DEV(dev) \ - memset(&dev->atr_csum,0, \ - sizeof(struct cm4000_dev) - \ - offsetof(struct cm4000_dev, atr_csum)) +#define ZERO_DEV(dev) memset(&dev->init, 0, sizeof(dev->init)) static struct pcmcia_device *dev_table[CM4000_MAX_DEV]; static struct class *cmm_class; -- 2.30.2 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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 28961C4320A for ; Tue, 27 Jul 2021 21:17:42 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 EAB0660BD3 for ; Tue, 27 Jul 2021 21:17:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org EAB0660BD3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7A2766EAB9; Tue, 27 Jul 2021 21:17:40 +0000 (UTC) Received: from mail-pj1-x1031.google.com (mail-pj1-x1031.google.com [IPv6:2607:f8b0:4864:20::1031]) by gabe.freedesktop.org (Postfix) with ESMTPS id 40FD66E9EF for ; Tue, 27 Jul 2021 21:16:57 +0000 (UTC) Received: by mail-pj1-x1031.google.com with SMTP id l19so1965939pjz.0 for ; Tue, 27 Jul 2021 14:16:57 -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=SsQl9AGgDVz4dMjQrj5Kn4zFkC00P69ydvQa5XL3s70=; b=Rs6HYoDB8JCI5LZcFDXmByirUGKdsEtYf0xGfbcTHeZOr8iLIgjdfNm+fUHA8pOrtM dUxzT2LIMFv8uDeD3I7uQhaPpIzublFtLZaKhb6m8G+5wrXncTNkX9kgfHOyRoc8fGvX nUFj4adSWSn12tKJr3EXvjYqssUobHPHsIXqI= 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=SsQl9AGgDVz4dMjQrj5Kn4zFkC00P69ydvQa5XL3s70=; b=EJ1Mxspl5R/xMNqYR9csd2hoBO3R9ykETEKSiGimHWKhhzvvhxEWRDZlU8BN89xV5l BMUEvm2Er0JuZpF03w9LFTE24lHvbu7kYb1G0zvQEWyxIAbDR9cHW8IHA7l/qiJPO/Xq mpg7I4YwDqJKlpEX6hOZkYLu0CVLB9Ne7HXqPzoW2Jgqqk7TsTGjO9Qov9+5LX9U4a+t x0rbAHSoBN/qu4QXBlP6MQcpmivZggYs3OacW2nBAwE2v/Iftp+nZkhqHcMklWwk1VCK AXYkfyUAXPnY8hrHFVrpyT4FYTIsmA2W23uAo3CwROo37U55P/mByIhO/k73iNZM6/gF xhaw== X-Gm-Message-State: AOAM533EDmurwRhzvfII2ZozHGB2fgqYgGnB1s1fFB77iXo2ZI6EZONf XAk21vxhjynx6YP++f4tmVd/YQ== X-Google-Smtp-Source: ABdhPJxHQnolGrNqUWuxT3TRrygeD/Y4uv8PYH40HLi8EsnsRtbjxlRySGM6XIllWkttnsKi9TCjpQ== X-Received: by 2002:a62:ce0f:0:b029:39a:a638:f25b with SMTP id y15-20020a62ce0f0000b029039aa638f25bmr10561280pfg.42.1627420616933; Tue, 27 Jul 2021 14:16:56 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id v10sm3566644pjd.29.2021.07.27.14.16.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jul 2021 14:16:54 -0700 (PDT) From: Kees Cook To: linux-hardening@vger.kernel.org Subject: [PATCH 49/64] cm4000_cs: Use struct_group() to zero struct cm4000_dev region Date: Tue, 27 Jul 2021 13:58:40 -0700 Message-Id: <20210727205855.411487-50-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210727205855.411487-1-keescook@chromium.org> References: <20210727205855.411487-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1505; h=from:subject; bh=pEaLYejpw1rouLzkWI/x3bS06fu+DrrD0bTA3jR4D24=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhAHOLvAh3w+r+2Msan2T2U4UOiQHuaUCBe1ciGiHP 57FYFAmJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYQBziwAKCRCJcvTf3G3AJoDND/ 49iXlS8sP97A+TuQ1hW5zJk7qY4Cq/D6b+K1NZSr+4oxO8lsE5F6t9Yp5H2qKpQDH3aG1Y9eseHUet DuqxELASm6TEbv9OaDETKL/st1lYW3XnzIdg4jtHyIUR7l5R/zIZWVCZjBklYrBtW+5MfFN8QuuF/F lvWawq3IPr3DCsm73XdFP6Bc1lZvICUNlEpP/HrD4TRKQi8UcHlSKwLWB74WqQx4AXq0BeprPCj2+K 42l0klkcuGwQNXyEcytxOhIx1zOxhcCTx0MIEflgGQVpkEiSYsDfzS1bJdn9uw6osxjKzg81OaNfq3 nTCOrIrEUVrjsW/YQShJRG1piOtrMFenXJVqU+berM3mVlnU+b+WDEDFNI+DLr5KX7D5l7IPFskN7l QyIaULkhJZ6CLvwzOoVY7vIlqZi9yNnUcfzAODBfpImwjzd2gLx/nV18ywN1M+ifdG3l0jjRTOV39w 4QYa5ZAzd0U/P351r3R8m8ZaiSHjEUVJeN1PD7EexenIxVofRslJik5zDpKZPpb133Y5HOZQsfajom cIz74vJI2Jk82zGIJHBlsHVUj9yJkvhh/o3qK0i/XCfm4ybkalh4dXPTiXC5ddEfdP/qhK66ovmt1y Gr7orTiLuQ3FhBQJUseFFY2YfzQgiCe7UUGAJJZGZ/PgkQ1TY0MyXJ3eMxkA== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , linux-kbuild@vger.kernel.org, Greg Kroah-Hartman , linux-staging@lists.linux.dev, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, "Gustavo A. R. Silva" , linux-block@vger.kernel.org, clang-built-linux@googlegroups.com, Keith Packard , netdev@vger.kernel.org, Andrew Morton Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 cm4000_dev that should be initialized to zero. Signed-off-by: Kees Cook --- drivers/char/pcmcia/cm4000_cs.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c index 8f1bce0b4fe5..2f43e7088e16 100644 --- a/drivers/char/pcmcia/cm4000_cs.c +++ b/drivers/char/pcmcia/cm4000_cs.c @@ -116,8 +116,9 @@ struct cm4000_dev { wait_queue_head_t atrq; /* wait for ATR valid */ wait_queue_head_t readq; /* used by write to wake blk.read */ - /* warning: do not move this fields. + /* warning: do not move this struct group. * initialising to zero depends on it - see ZERO_DEV below. */ + struct_group(init, unsigned char atr_csum; unsigned char atr_len_retry; unsigned short atr_len; @@ -140,12 +141,10 @@ struct cm4000_dev { struct timer_list timer; /* used to keep monitor running */ int monitor_running; + ); }; -#define ZERO_DEV(dev) \ - memset(&dev->atr_csum,0, \ - sizeof(struct cm4000_dev) - \ - offsetof(struct cm4000_dev, atr_csum)) +#define ZERO_DEV(dev) memset(&dev->init, 0, sizeof(dev->init)) static struct pcmcia_device *dev_table[CM4000_MAX_DEV]; static struct class *cmm_class; -- 2.30.2