From nobody Tue Feb 10 00:22:05 2026 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 2A9A9C7EE29 for ; Fri, 19 May 2023 16:24:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230116AbjESQYk (ORCPT ); Fri, 19 May 2023 12:24:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229571AbjESQYi (ORCPT ); Fri, 19 May 2023 12:24:38 -0400 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (mail-mw2nam12on2056.outbound.protection.outlook.com [40.107.244.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 374FE8F for ; Fri, 19 May 2023 09:24:37 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=VuTp3zJfzaOJGkj59dZAL+IWcFxua3nCG4r8EObB6zQBvCC5by95sebqFVPX8F/dR9wWU890fp+S+aH9EB8jdxG7rqBKPUWUyHlROwi6N73MWVr7SWPOpxdTE7t9W94PEm3vUi74hUYj1kdovhHFC6dzXr+RtuS/2LBkYPMtSyokHRh79C8/GzVIVCGLWSKNrZAWod0mMQ7k8pZrUdHstZyafskq9aDvWHVlZ6hIHsCw71z6BlU1XlavuxaKPt4lB+p2b1otX8DOpMrDvvj4W9Q9BcGmzhPMRHLtlXReKihoGjj9GzSh3CyBxcN14pIVdxxC0CEjby0Z5NTYLJzW0Q== 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=zrl1+aY9B4MUc/Htnd/dbIrwQO2Nvs4GfUL3eP6gJLY=; b=mXZOLe/1sWmPcnhxbuApAlRjYdJI74ndKBvZhnkgxb4+pknXAxM/Ovxzgylh6ptjbeCXOEcsnlhfUjfO3oEzCaZPKCbc+kvfoJlBhf+mMWNRB3PN5MAtd0HYO39JBQfuDCQ7BxZVPGsXf2u32xp4KMOdbqD6hx3ZjHAHy/eB1l3wWs8NlqIxErp8/uCXYOZqbs2Ahsik7hFswQHdyeB8dBakk75+EzwleycltYgw0M5rmUjJnIxAOXbcpga73Nv9/8Fd+qM4y3rXuJ4FXszONMesQFiaAiNkqwXMWvMt5FW2rRQ7nHtqgzZ9ZNqQ9LQQIZ0pJELPJ4nCGCxagN9huw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=vger.kernel.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=zrl1+aY9B4MUc/Htnd/dbIrwQO2Nvs4GfUL3eP6gJLY=; b=H5/f1G0kGjI+y+3JEcKgBVWf4Tj/i02lyxBguYasNkpGXPzLPamINDZv9B9RALdIdfJ9OvyLQpJ0Vj962lvzWMoHQARRd6Hi6JwkBIg07/pnnaO3ii1E4kkKvGqhsdZd2lZvVpkYUA4U+kz/g014dqE8vbcYZ/oGACgTHbfWWIs= Received: from MW4P220CA0027.NAMP220.PROD.OUTLOOK.COM (2603:10b6:303:115::32) by DM4PR12MB6303.namprd12.prod.outlook.com (2603:10b6:8:a3::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6411.21; Fri, 19 May 2023 16:24:31 +0000 Received: from CO1NAM11FT049.eop-nam11.prod.protection.outlook.com (2603:10b6:303:115:cafe::b7) by MW4P220CA0027.outlook.office365.com (2603:10b6:303:115::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6411.21 via Frontend Transport; Fri, 19 May 2023 16:24:31 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CO1NAM11FT049.mail.protection.outlook.com (10.13.175.50) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6411.21 via Frontend Transport; Fri, 19 May 2023 16:24:31 +0000 Received: from tlendack-t1.amdoffice.net (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Fri, 19 May 2023 11:24:29 -0500 From: Tom Lendacky To: , CC: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "Kirill A. Shutemov" , "H. Peter Anvin" , Michael Roth , Joerg Roedel , Dionna Glaze , Andy Lutomirski , Peter Zijlstra Subject: [PATCH 1/6] x86/sev: Fix calculation of end address based on number of pages Date: Fri, 19 May 2023 11:24:12 -0500 Message-ID: X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230518231434.26080-1-kirill.shutemov@linux.intel.com> References: <20230518231434.26080-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT049:EE_|DM4PR12MB6303:EE_ X-MS-Office365-Filtering-Correlation-Id: e3a3aafc-79d8-4200-afbd-08db58858681 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:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(396003)(376002)(39860400002)(136003)(346002)(451199021)(46966006)(40470700004)(36840700001)(8936002)(8676002)(478600001)(40480700001)(336012)(426003)(54906003)(110136005)(41300700001)(5660300002)(7416002)(4326008)(70206006)(6666004)(316002)(70586007)(16526019)(2906002)(186003)(26005)(40460700003)(81166007)(356005)(82740400003)(36860700001)(2616005)(47076005)(83380400001)(36756003)(86362001)(82310400005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 May 2023 16:24:31.2191 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e3a3aafc-79d8-4200-afbd-08db58858681 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT049.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6303 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" When calculating an end address based on an unsigned int number of pages, any value greater than or equal to 0x100000 that is shift PAGE_SHIFT bits results in a 0 value, resulting in an invalid end address. Change the number of pages variable in various routines from an unsigned int to an unsigned long to calculate the end address correctly. Fixes: 5e5ccff60a29 ("x86/sev: Add helper for validating pages in early enc= attribute changes") Fixes: dc3f3d2474b8 ("x86/mm: Validate memory when changing the C-bit") Signed-off-by: Tom Lendacky --- arch/x86/include/asm/sev.h | 16 ++++++++-------- arch/x86/kernel/sev.c | 14 +++++++------- 2 files changed, 15 insertions(+), 15 deletions(-) diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h index 13dc2a9d23c1..7ca5c9ec8b52 100644 --- a/arch/x86/include/asm/sev.h +++ b/arch/x86/include/asm/sev.h @@ -192,12 +192,12 @@ struct snp_guest_request_ioctl; =20 void setup_ghcb(void); void __init early_snp_set_memory_private(unsigned long vaddr, unsigned lon= g paddr, - unsigned int npages); + unsigned long npages); void __init early_snp_set_memory_shared(unsigned long vaddr, unsigned long= paddr, - unsigned int npages); + unsigned long npages); void __init snp_prep_memory(unsigned long paddr, unsigned int sz, enum psc= _op op); -void snp_set_memory_shared(unsigned long vaddr, unsigned int npages); -void snp_set_memory_private(unsigned long vaddr, unsigned int npages); +void snp_set_memory_shared(unsigned long vaddr, unsigned long npages); +void snp_set_memory_private(unsigned long vaddr, unsigned long npages); void snp_set_wakeup_secondary_cpu(void); bool snp_init(struct boot_params *bp); void __init __noreturn snp_abort(void); @@ -212,12 +212,12 @@ static inline int pvalidate(unsigned long vaddr, bool= rmp_psize, bool validate) static inline int rmpadjust(unsigned long vaddr, bool rmp_psize, unsigned = long attrs) { return 0; } static inline void setup_ghcb(void) { } static inline void __init -early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr, uns= igned int npages) { } +early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr, uns= igned long npages) { } static inline void __init -early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr, unsi= gned int npages) { } +early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr, unsi= gned long npages) { } static inline void __init snp_prep_memory(unsigned long paddr, unsigned in= t sz, enum psc_op op) { } -static inline void snp_set_memory_shared(unsigned long vaddr, unsigned int= npages) { } -static inline void snp_set_memory_private(unsigned long vaddr, unsigned in= t npages) { } +static inline void snp_set_memory_shared(unsigned long vaddr, unsigned lon= g npages) { } +static inline void snp_set_memory_private(unsigned long vaddr, unsigned lo= ng npages) { } static inline void snp_set_wakeup_secondary_cpu(void) { } static inline bool snp_init(struct boot_params *bp) { return false; } static inline void snp_abort(void) { } diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c index b031244d6d2d..108bbae59c35 100644 --- a/arch/x86/kernel/sev.c +++ b/arch/x86/kernel/sev.c @@ -645,7 +645,7 @@ static u64 __init get_jump_table_addr(void) return ret; } =20 -static void pvalidate_pages(unsigned long vaddr, unsigned int npages, bool= validate) +static void pvalidate_pages(unsigned long vaddr, unsigned long npages, boo= l validate) { unsigned long vaddr_end; int rc; @@ -662,7 +662,7 @@ static void pvalidate_pages(unsigned long vaddr, unsign= ed int npages, bool valid } } =20 -static void __init early_set_pages_state(unsigned long paddr, unsigned int= npages, enum psc_op op) +static void __init early_set_pages_state(unsigned long paddr, unsigned lon= g npages, enum psc_op op) { unsigned long paddr_end; u64 val; @@ -701,7 +701,7 @@ static void __init early_set_pages_state(unsigned long = paddr, unsigned int npage } =20 void __init early_snp_set_memory_private(unsigned long vaddr, unsigned lon= g paddr, - unsigned int npages) + unsigned long npages) { /* * This can be invoked in early boot while running identity mapped, so @@ -723,7 +723,7 @@ void __init early_snp_set_memory_private(unsigned long = vaddr, unsigned long padd } =20 void __init early_snp_set_memory_shared(unsigned long vaddr, unsigned long= paddr, - unsigned int npages) + unsigned long npages) { /* * This can be invoked in early boot while running identity mapped, so @@ -879,7 +879,7 @@ static void __set_pages_state(struct snp_psc_desc *data= , unsigned long vaddr, sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_PSC); } =20 -static void set_pages_state(unsigned long vaddr, unsigned int npages, int = op) +static void set_pages_state(unsigned long vaddr, unsigned long npages, int= op) { unsigned long vaddr_end, next_vaddr; struct snp_psc_desc *desc; @@ -904,7 +904,7 @@ static void set_pages_state(unsigned long vaddr, unsign= ed int npages, int op) kfree(desc); } =20 -void snp_set_memory_shared(unsigned long vaddr, unsigned int npages) +void snp_set_memory_shared(unsigned long vaddr, unsigned long npages) { if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) return; @@ -914,7 +914,7 @@ void snp_set_memory_shared(unsigned long vaddr, unsigne= d int npages) set_pages_state(vaddr, npages, SNP_PAGE_STATE_SHARED); } =20 -void snp_set_memory_private(unsigned long vaddr, unsigned int npages) +void snp_set_memory_private(unsigned long vaddr, unsigned long npages) { if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) return; --=20 2.40.0