From patchwork Thu May 11 17:32:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sumit Gupta X-Patchwork-Id: 681409 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 8CF42C7EE23 for ; Thu, 11 May 2023 17:34:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238666AbjEKRew (ORCPT ); Thu, 11 May 2023 13:34:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33886 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238957AbjEKRer (ORCPT ); Thu, 11 May 2023 13:34:47 -0400 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (mail-bn7nam10on2065.outbound.protection.outlook.com [40.107.92.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D23BF8A72; Thu, 11 May 2023 10:34:12 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=mwLnv7Mu6Cjc6SXSBO6kBfmjrgmsIHdtTqfg7njA4Rm8XdOnw82fbjt/93IdMaNNXq+C1HBh0CIuNf690t52xqfrwG2EDi4fMEDQnVtMolwutz8AhiNxiENepG40ipUlTXYJIba9C6xrn/8T4oSN62CyyIg/KGij/azBP6dMxisdxk+UIU3X7YLtHhZibKa22ma+GOiMF2dqcFlsn945Asjas4lEE8eIW6WHMhgPp7B4LfnkCDsfwAYavd4p64R1Fzs+nyH1lIo5A1aaIf0VkJTYPkEd02JG2nPmGY64xfLxO+rb+9QV3TbwsP27RY4oX3KOmhbvjEKwFywCYqoNwA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=XoLxQ/aoqkolqX/Bc5Ghr9wWeKjvVcGBxx3jPRPmbH4=; b=jHXlVYppm1YAnYmLdY+COH3qsVGIUK2QYL2a0dSvXl0fjyAGiYcBANBfNS3ZwSRiffoBc8SqiUBIR8axzErx0OKq4Xk8npXoJLIWDHl2IGl8ARry89uvKpN+2avDhBhWinoiZFJQqiIkf5tuQRFEtZj6mW0bw4zvvvx1X3FydX4vZatwEzsMS2RXy805tOaurZg9gehgH5dxKNfTp5puC4DKoRBaC3h2ohFg5K2RCvoy+jQ0DMledOTjPfeNLiKUDECNXAzq6EYw7WpgzYG4iiHHfaD/pjfSpYv5TLuSdJvx8Dl6BJWf8smTrdJe6eZJz+wso44JNA2OSE0niZaUAQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.118.233) smtp.rcpttodomain=google.com smtp.mailfrom=nvidia.com; dmarc=pass (p=reject sp=reject pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=XoLxQ/aoqkolqX/Bc5Ghr9wWeKjvVcGBxx3jPRPmbH4=; b=f3zIPLDpktHCfEtD2esweIWVUth4KDCdCIHtGN4uIjk3frPcQvep9o8cYGJb4ymOdL48QMinV2CehQrQ0T045WT0CUMVOONsP10jmJLtSseYlsgH0MfWB+HyRhXcb2uH5AgjG/zR17ATMkz+G/te+qEtiWwh/LazicE0ITZvU7pR+M7Yip+qTlZpDWVmH13jlDrDxJWCVRr5rpDd0v9ppKBmRv0dYAr6WuhP4SVqNwPPx2QBbJYHv3n/5VQfZhJL4JwRd0s6bBHK7Jyw1dNgTA+OtiOZFlFROb157OE4KVgSPe8bfTQujsUvWotwq+UfXiyd9C+PDFoe9sapnv+glQ== Received: from DM6PR13CA0024.namprd13.prod.outlook.com (2603:10b6:5:bc::37) by PH7PR12MB9150.namprd12.prod.outlook.com (2603:10b6:510:2eb::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6387.22; Thu, 11 May 2023 17:33:44 +0000 Received: from DM6NAM11FT036.eop-nam11.prod.protection.outlook.com (2603:10b6:5:bc:cafe::f7) by DM6PR13CA0024.outlook.office365.com (2603:10b6:5:bc::37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6411.7 via Frontend Transport; Thu, 11 May 2023 17:33:43 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.118.233) smtp.mailfrom=nvidia.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.118.233 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.118.233; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.118.233) by DM6NAM11FT036.mail.protection.outlook.com (10.13.172.64) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6387.22 via Frontend Transport; Thu, 11 May 2023 17:33:43 +0000 Received: from drhqmail203.nvidia.com (10.126.190.182) by mail.nvidia.com (10.127.129.6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.5; Thu, 11 May 2023 10:33:31 -0700 Received: from drhqmail203.nvidia.com (10.126.190.182) by drhqmail203.nvidia.com (10.126.190.182) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.37; Thu, 11 May 2023 10:33:31 -0700 Received: from sumitg-l4t.nvidia.com (10.127.8.10) by mail.nvidia.com (10.126.190.182) with Microsoft SMTP Server id 15.2.986.37 via Frontend Transport; Thu, 11 May 2023 10:33:25 -0700 From: Sumit Gupta To: , , , , , , , , CC: , , , , , , , , , , , , , Subject: [Patch v8 6/8] PCI: tegra194: Fix possible array out of bounds access Date: Thu, 11 May 2023 23:02:09 +0530 Message-ID: <20230511173211.9127-7-sumitg@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230511173211.9127-1-sumitg@nvidia.com> References: <20230511173211.9127-1-sumitg@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT036:EE_|PH7PR12MB9150:EE_ X-MS-Office365-Filtering-Correlation-Id: 3b3d4958-3f7e-4928-f66f-08db5245de30 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge2.nvidia.com; CAT:NONE; SFS:(13230028)(4636009)(39860400002)(136003)(396003)(346002)(376002)(451199021)(46966006)(40470700004)(36840700001)(86362001)(36756003)(54906003)(316002)(110136005)(4326008)(70206006)(70586007)(966005)(478600001)(7696005)(6666004)(82310400005)(40480700001)(5660300002)(8676002)(8936002)(2906002)(7416002)(7636003)(41300700001)(356005)(82740400003)(2616005)(186003)(107886003)(36860700001)(1076003)(26005)(426003)(336012)(83380400001)(47076005)(40460700003); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 May 2023 17:33:43.5622 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3b3d4958-3f7e-4928-f66f-08db5245de30 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.233]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT036.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB9150 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add check to fix the possible array out of bounds violation by making speed equal to GEN1_CORE_CLK_FREQ when its value is more than the size of "pcie_gen_freq" array. This array has size of four but possible speed (CLS) values are from "0 to 0xF". So, "speed - 1" values are "-1 to 0xE". Suggested-by: Bjorn Helgaas Signed-off-by: Sumit Gupta Link: https://lore.kernel.org/lkml/72b9168b-d4d6-4312-32ea-69358df2f2d0@nvidia.com/ Acked-by: Lorenzo Pieralisi --- drivers/pci/controller/dwc/pcie-tegra194.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c index 09825b4a075e..e6eec85480ca 100644 --- a/drivers/pci/controller/dwc/pcie-tegra194.c +++ b/drivers/pci/controller/dwc/pcie-tegra194.c @@ -223,6 +223,7 @@ #define EP_STATE_ENABLED 1 static const unsigned int pcie_gen_freq[] = { + GEN1_CORE_CLK_FREQ, /* PCI_EXP_LNKSTA_CLS == 0; undefined */ GEN1_CORE_CLK_FREQ, GEN2_CORE_CLK_FREQ, GEN3_CORE_CLK_FREQ, @@ -459,7 +460,11 @@ static irqreturn_t tegra_pcie_ep_irq_thread(int irq, void *arg) speed = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA) & PCI_EXP_LNKSTA_CLS; - clk_set_rate(pcie->core_clk, pcie_gen_freq[speed - 1]); + + if (speed >= ARRAY_SIZE(pcie_gen_freq)) + speed = 0; + + clk_set_rate(pcie->core_clk, pcie_gen_freq[speed]); if (pcie->of_data->has_ltr_req_fix) return IRQ_HANDLED; @@ -1020,7 +1025,11 @@ static int tegra_pcie_dw_start_link(struct dw_pcie *pci) speed = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA) & PCI_EXP_LNKSTA_CLS; - clk_set_rate(pcie->core_clk, pcie_gen_freq[speed - 1]); + + if (speed >= ARRAY_SIZE(pcie_gen_freq)) + speed = 0; + + clk_set_rate(pcie->core_clk, pcie_gen_freq[speed]); tegra_pcie_enable_interrupts(pp);