From patchwork Thu Aug 17 20:42:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 13356917 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 53C10C64E96 for ; Thu, 17 Aug 2023 20:43:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354962AbjHQUmm (ORCPT ); Thu, 17 Aug 2023 16:42:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44104 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354958AbjHQUmT (ORCPT ); Thu, 17 Aug 2023 16:42:19 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 444BE2D72 for ; Thu, 17 Aug 2023 13:42:18 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id d9443c01a7336-1bc6535027aso1872395ad.2 for ; Thu, 17 Aug 2023 13:42:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1692304938; x=1692909738; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=GJmAzvapOutvPkrb5k8FqNTcJnY32flwAQr4+re3BlM=; b=VzXNH3dV5IOgCFbXRiThrdo6uGwH5Ty9rguuRzFYLtZjhPNnNpR3XoUo71zdBOWeio /fnXP3FvC7UVlPnoH6DjAhZRoNkE70NTxuzp/DEfQhI5KYUMdoQXPmrFhcPPfg+KZ1x8 jES41E3dA2rbmNcV/BlKUfrJDiD79PJRbZWio= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692304938; x=1692909738; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=GJmAzvapOutvPkrb5k8FqNTcJnY32flwAQr4+re3BlM=; b=DeqVVycv6UC+yo99II9XX5EvYtqJLtUuwLmRK5VR8EKXnCMDF2KQwC1WYVs2WSVeYv u4/e80RONzV9+Tna23FkaRcWJjfkwyBoLEx9nf8R4OH3UanWe/7WUiw+LtjXY6BhBHwF Qcf3FWh7Eiows22icw/0bUxJe/lHB4ji7YNZy9V870rOpB1c9jJNcTZS99TqLiThxXkL 2IOpwkC+byqqr8bYVb2JzDdbcy9/uZKykwOrT+Xbezy3P8e/WUB5WS4MOZGWTH/r2YP3 5YvHYKfRXQgHJUFSpJoI/mLT1sZYMmyy71Z3CN5TGNyV03mAswqxs2XYNehxFQNiXBxH wgJA== X-Gm-Message-State: AOJu0YwfuAwJXJtgEVAFRvgZeZ1lWQRgdkBV0tfnpdrhcJhMMgb2gqY0 tFJfM89lW/6wpST7zX8F143lvw== X-Google-Smtp-Source: AGHT+IHrogL0Xdsxq0CyyNb4Qufw7ZNxe4F/xPT8gesfxkYm5vRUzu7UKbzv9OQeL/RnSUHmy4YKLw== X-Received: by 2002:a17:902:e546:b0:1bb:a522:909a with SMTP id n6-20020a170902e54600b001bba522909amr594193plf.37.1692304937693; Thu, 17 Aug 2023 13:42:17 -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 b11-20020a170902bd4b00b001bdcc3a09c3sm177279plx.256.2023.08.17.13.42.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 13:42:17 -0700 (PDT) From: Kees Cook To: Andy Gross Cc: Kees Cook , Bjorn Andersson , Konrad Dybcio , Georgi Djakov , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH] interconnect: qcom: Annotate struct icc_onecell_data with __counted_by Date: Thu, 17 Aug 2023 13:42:15 -0700 Message-Id: <20230817204215.never.916-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3789; i=keescook@chromium.org; h=from:subject:message-id; bh=AYpdhVDwJu2OwMLTaV1ZMwBOcGX4aSqyJvLvspWtvFw=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBk3oYnMGx9/0oGfe2HMN10NNHiagAkOhbRsVfwM Ys/iO2HGTyJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZN6GJwAKCRCJcvTf3G3A JuXoD/9ny0KtsXPv8eBrgFAzN2E9KziVmPDkfCMLhIKMVm9FuRbWrR3oO7uqOH33zE4R+E8DxWI vzT6ZAjJdKarN8uMYb5eHUUsbuUD/7+XrJoKqCQMGxWBd+AEpClnwhmpeNJc8ZzHEtLHPzfi5WJ iUvHSYP2eIiXrT1oXnGj4H1l1B35C+xFvAxgcRODvhlMJpHgzfREgVmAHBJdTrBJMZeA1LMnOkq ml0Bp69oEDEjFw+CymU/YELRg/Xkjprjw5z5T3GP/wgEHSmLHDMx2YIYzcBRrJtbvxlHyfylA0k ReHqltdFdWPI1MVxFUdj4THgbr9Y9AR6dLlV/55InecBVu8gdFxrIJAoJ5R9OsRWXsMHpueOgi0 HMmTvGCiaKOwt5pzw6emTq14UVPraxEW8Xz0q9WHanedlDMUxyS0qg8RdJvVqdTEXyEen3AUXlN th13YeLFTH4K3jOyofErng0WWDPN096G/ae0fF2ck0hLypgE6zdkSEbAsKJKJMDpzgiYyyUClEm gl0WSUFJukJYk+VL2MmtEwwc5hu6TizQW72YO6gptGmTbEpCb38JW2/PPHysfh3QhOfm3S74pyG GafjfHCQgLQVnr8kocXTYYj+hhi9jLQ3VVgDRnhEqFXdHnygFu/pILCmvUSvu6Fe97NDDTvoH4v fd65EX+ oPRAlh9g== 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 icc_onecell_data. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Andy Gross Cc: Bjorn Andersson Cc: Konrad Dybcio Cc: Georgi Djakov Cc: linux-arm-msm@vger.kernel.org Cc: linux-pm@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Acked-by: Konrad Dybcio --- drivers/interconnect/qcom/icc-rpmh.c | 3 +-- drivers/interconnect/qcom/msm8974.c | 2 +- drivers/interconnect/qcom/osm-l3.c | 2 +- include/linux/interconnect-provider.h | 2 +- 4 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/interconnect/qcom/icc-rpmh.c b/drivers/interconnect/qcom/icc-rpmh.c index 8053ec8ab01b..b9f27ce3b607 100644 --- a/drivers/interconnect/qcom/icc-rpmh.c +++ b/drivers/interconnect/qcom/icc-rpmh.c @@ -185,6 +185,7 @@ int qcom_icc_rpmh_probe(struct platform_device *pdev) data = devm_kzalloc(dev, struct_size(data, nodes, num_nodes), GFP_KERNEL); if (!data) return -ENOMEM; + data->num_nodes = num_nodes; provider = &qp->provider; provider->dev = dev; @@ -228,8 +229,6 @@ int qcom_icc_rpmh_probe(struct platform_device *pdev) data->nodes[i] = node; } - data->num_nodes = num_nodes; - ret = icc_provider_register(provider); if (ret) goto err_remove_nodes; diff --git a/drivers/interconnect/qcom/msm8974.c b/drivers/interconnect/qcom/msm8974.c index b85cab2f208f..885ca9d6d4ed 100644 --- a/drivers/interconnect/qcom/msm8974.c +++ b/drivers/interconnect/qcom/msm8974.c @@ -675,6 +675,7 @@ static int msm8974_icc_probe(struct platform_device *pdev) GFP_KERNEL); if (!data) return -ENOMEM; + data->num_nodes = num_nodes; qp->bus_clks = devm_kmemdup(dev, msm8974_icc_bus_clocks, sizeof(msm8974_icc_bus_clocks), GFP_KERNEL); @@ -721,7 +722,6 @@ static int msm8974_icc_probe(struct platform_device *pdev) data->nodes[i] = node; } - data->num_nodes = num_nodes; ret = icc_provider_register(provider); if (ret) diff --git a/drivers/interconnect/qcom/osm-l3.c b/drivers/interconnect/qcom/osm-l3.c index 056ac91225c4..dc321bb86d0b 100644 --- a/drivers/interconnect/qcom/osm-l3.c +++ b/drivers/interconnect/qcom/osm-l3.c @@ -232,6 +232,7 @@ static int qcom_osm_l3_probe(struct platform_device *pdev) data = devm_kzalloc(&pdev->dev, struct_size(data, nodes, num_nodes), GFP_KERNEL); if (!data) return -ENOMEM; + data->num_nodes = num_nodes; provider = &qp->provider; provider->dev = &pdev->dev; @@ -261,7 +262,6 @@ static int qcom_osm_l3_probe(struct platform_device *pdev) data->nodes[i] = node; } - data->num_nodes = num_nodes; ret = icc_provider_register(provider); if (ret) diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h index e6d8aca6886d..7ba183f221f1 100644 --- a/include/linux/interconnect-provider.h +++ b/include/linux/interconnect-provider.h @@ -33,7 +33,7 @@ struct icc_node_data { */ struct icc_onecell_data { unsigned int num_nodes; - struct icc_node *nodes[]; + struct icc_node *nodes[] __counted_by(num_nodes); }; struct icc_node *of_icc_xlate_onecell(struct of_phandle_args *spec,