From patchwork Thu Aug 17 23:58:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 13357126 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E7A7ECD624 for ; Fri, 18 Aug 2023 00:00:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356397AbjHQX7k (ORCPT ); Thu, 17 Aug 2023 19:59:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44090 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356392AbjHQX7Q (ORCPT ); Thu, 17 Aug 2023 19:59:16 -0400 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CE42F3A8D for ; Thu, 17 Aug 2023 16:59:11 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-689f4fb1c29so275178b3a.0 for ; Thu, 17 Aug 2023 16:59:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1692316751; x=1692921551; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=/y2Eh4/WKRjvBkeOEfQI129skaNYk4SyGprhYtjFhak=; b=SzUW2GrAVSjYkhX+pusIUEOM+KNuQmK1FASSRRo4qO8aZqzl/n/O9lDGtPK2t65ly2 aR/6/Z55DpooK0hj1hBnzvmaxOGaMFCvnXYiGBjR9+03xK0pMUQjNqa3GJWDJNBe3qiF jT3v6MwHJmiAXg1SI/wTDZTvSnHlP95OYuJHA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692316751; x=1692921551; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=/y2Eh4/WKRjvBkeOEfQI129skaNYk4SyGprhYtjFhak=; b=ZO5rIi/DgeDoyTdPVQyn6Liiir1m5TSNt05VKISOcJOdwL6o74SD8vH9b8mmMQWfBz Ct0nosZW79A8LuIC287X2fZevwmiUvt/xnih64uaI+Az1gufogCMCU2ck22LXISywm6D KrcGUJJbIKZPftlV+l65vO/pUrU4UGGU0076VW+uDCqxbW1xU9+N2lRlrgSlMnX49jtX sFClVmxWQNM9GbcPsvMrg95qAlfEgOWs0R1H+nx9BbMRdRgpKLnNyFMg3w7En6HL30/p 12yr7WARvz8K7X6eQIKBz5WwxthxlBrRhcE2B9ATeE7BrM0wpsN3Y5X52gBBcNwEKpwy bEaA== X-Gm-Message-State: AOJu0YwpgKZZl6jp2VnZNMH+6yd+To0ojWwVl/TwSeIFrChuQJ3TbGPo /jDsbsSqRhYmRKMYBo8+ykVuZA== X-Google-Smtp-Source: AGHT+IHFr30RcRjlqiQJEr6xWEDOZp1+abHFVC9+OhQwpQoJHgk9ThDktq6OxUXsC0D8f6pR31KY3Q== X-Received: by 2002:a05:6a00:2d10:b0:687:ffac:c62e with SMTP id fa16-20020a056a002d1000b00687ffacc62emr5083101pfb.3.1692316751240; Thu, 17 Aug 2023 16:59:11 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id q26-20020a62ae1a000000b0064378c52398sm313422pff.25.2023.08.17.16.59.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 16:59:08 -0700 (PDT) From: Kees Cook To: Vinod Koul Cc: Kees Cook , Patrice Chotard , linux-arm-kernel@lists.infradead.org, dmaengine@vger.kernel.org, Hector Martin , Sven Peter , Alyssa Rosenzweig , Ludovic Desroches , Tudor Ambarus , Lars-Peter Clausen , Zhou Wang , Jie Hai , Andy Gross , Bjorn Andersson , Konrad Dybcio , Green Wan , Orson Zhai , Baolin Wang , Chunyan Zhang , Maxime Coquelin , Alexandre Torgue , Laxman Dewangan , Jon Hunter , Thierry Reding , Peter Ujfalusi , Kunihiko Hayashi , Masami Hiramatsu , Yu Kuai , Greg Kroah-Hartman , Jordy Zomer , Jernej Skrabec , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, asahi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-tegra@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 11/21] dmaengine: st_fdma: Annotate struct st_fdma_desc with __counted_by Date: Thu, 17 Aug 2023 16:58:48 -0700 Message-Id: <20230817235859.49846-11-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230817235428.never.111-kees@kernel.org> References: <20230817235428.never.111-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1181; i=keescook@chromium.org; h=from:subject; bh=/eh3gjVXUNLSKs9JrCYa1PazNmJDO3vyJIq0hWQiyZ8=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3rRAuXQI4DpuGM5iOlcO51tj0uf03Jt7vDRoW 1Ii4cUpYx6JAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN60QAAKCRCJcvTf3G3A Ju+5D/0YrvVo8rjhZaCcPFDgAshvwzk+u6v2Fw/4/dfJ+OS6ryJ+sJav8pUCdDNGIv2zNyAWlil adBNzQRmJl6gNY6faZUcd9pPz7Gcis004eQUoFbl8BnE3oJTlAxq+mvH7rqyIItvnZz+pJcjY0X tRJ+2EQIAhNV2+IAdF39L4hFVZgH9n07Un8gQljl3C6GL4SZ6ydxuNARV0yuzj7ksYtQmbUZWiM sjzN3ijHcW4y90VnWlisCuyiH85rwJD5v81mw4D4T0bIk/KVW/XzQElanZGyhFShZ7NB0xecSaW 4yskOrN45ih97E4wcfYbmX583qeuDF3+HIspWg4vx1Esg/JpzBGhZDGKmgjJgdKbiQeqPxJWziN rIPjrRxb64nMV1bvGZRAdGM9OEb7BpcPqDTHrYmHTuWlt8smEvhSGFIE1oonrgwP+V9dNpFIRUU dy5znG3aae+m869/A13/KcStCYb4q5v49KTf2ABP9XaGOsiow4VEg3WjkTcdDlCo0YX2VF5IgpY 73r7xslhvy5W4iRgnCw24jT+VAqyVI1tlBfB/8qckc7VndWWdkYtBmoiY4dhiAGxPg/PYcpwrrT NffAKTMZbkpcLpaBKi/B2Ah9kKVH82HTlRPVZ+JlStUZiw4juxxp/4t9OqnZmR3hLyQCVVpYhna yy/imOVfvaQKlqQ== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct st_fdma_desc. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Patrice Chotard Cc: linux-arm-kernel@lists.infradead.org Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva --- drivers/dma/st_fdma.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/st_fdma.h b/drivers/dma/st_fdma.h index fa15b97a3bab..f296412e96b6 100644 --- a/drivers/dma/st_fdma.h +++ b/drivers/dma/st_fdma.h @@ -97,7 +97,7 @@ struct st_fdma_desc { struct st_fdma_chan *fchan; bool iscyclic; unsigned int n_nodes; - struct st_fdma_sw_node node[]; + struct st_fdma_sw_node node[] __counted_by(n_nodes); }; enum st_fdma_type {