Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Dexuan Cui <decui@microsoft.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        "dave.hansen@intel.com" <dave.hansen@intel.com>,
        "tglx@linutronix.de" <tglx@linutronix.de>,
        "mingo@redhat.com" <mingo@redhat.com>,
        "bp@alien8.de" <bp@alien8.de>
CC:     "rick.p.edgecombe@intel.com" <rick.p.edgecombe@intel.com>,
        "sathyanarayanan.kuppuswamy@linux.intel.com" 
        <sathyanarayanan.kuppuswamy@linux.intel.com>,
        "seanjc@google.com" <seanjc@google.com>,
        "thomas.lendacky@amd.com" <thomas.lendacky@amd.com>,
        "x86@kernel.org" <x86@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH 0/2] x86/tdx: Fix one more load_unaligned_zeropad() issue
Thread-Topic: [PATCH 0/2] x86/tdx: Fix one more load_unaligned_zeropad() issue
Thread-Index: AQHZj1yNlxLZILZgE0eQSDdwpa7ZCa9r1INw
Date:   Fri, 26 May 2023 02:35:04 +0000
Message-ID: <SA1PR21MB13352E2075766916B0D675C0BF47A@SA1PR21MB1335.namprd21.prod.outlook.com>
References: <20230525225847.28592-1-kirill.shutemov@linux.intel.com>
In-Reply-To: <20230525225847.28592-1-kirill.shutemov@linux.intel.com>
Accept-Language: en-US
Content-Language: en-US
msip_labels: MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ActionId=2fa3e14d-0594-4887-93bf-d12fd697e2a0;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_ContentBits=0;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Enabled=true;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Method=Standard;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_Name=Internal;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SetDate=2023-05-26T02:27:29Z;MSIP_Label_f42aa342-8706-4288-bd11-ebb85995028c_SiteId=72f988bf-86f1-41af-91ab-2d7cd011db47;
authentication-results: dkim=none (message not signed)
 header.d=none;dmarc=none action=none header.from=microsoft.com;
x-ms-publictraffictype: Email
x-ms-traffictypediagnostic: SA1PR21MB1335:EE_|PH7PR21MB3236:EE_
x-ms-office365-filtering-correlation-id: 31173261-6a48-4786-954b-08db5d91d009
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:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SA1PR21MB1335.namprd21.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(4636009)(346002)(396003)(136003)(366004)(376002)(39860400002)(451199021)(186003)(786003)(9686003)(33656002)(316002)(6506007)(26005)(7696005)(86362001)(4744005)(71200400001)(2906002)(8936002)(8676002)(55016003)(7416002)(52536014)(5660300002)(41300700001)(82960400001)(478600001)(54906003)(10290500003)(82950400001)(110136005)(38100700002)(122000001)(8990500004)(66476007)(64756008)(4326008)(66446008)(66946007)(76116006)(66556008)(38070700005);DIR:OUT;SFP:1102;
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?V/etnvEp/ZK45a4JZVgJ/EeP/fB8NF+PwBO8n7qm7JyEwpY7Wiu7ruB2NZvM?=
 =?us-ascii?Q?FOO41ILL4Nj7n7sR7fVjEPb3lyHZbIXxAGFId6W9kcNaiSlFfERN51bhA0bt?=
 =?us-ascii?Q?cKnVT2mMfVUiiIsWngEwa78GkutUmOrRnxgX6cwQ1nucNRK4tsNJlCtfoL2Y?=
 =?us-ascii?Q?Z/lkQ2tR08AkkejlwmObO4jGbS/8zEiQQeZ/xJdg5c+EsamYHpkj3xOLhPei?=
 =?us-ascii?Q?JNyfzBiPfMpZEnr2SrAdxsO5PkIB+h2B4nBnizSUPusYkd2mDqPUXx3iDMei?=
 =?us-ascii?Q?CxcGsxYc+nKQCxYyc6jIujiVGnw1VZzRDEpe9D6WDzVjaMinGSd7IasNlAV+?=
 =?us-ascii?Q?k8vuQFF8CfcyiIlee1NBlAs+5V0Aiz+I2Ykn8EJSi8Dk/fQihJTVqzmEVUzV?=
 =?us-ascii?Q?ERAr03kC7vogwdwrn9TwuriTvF/VsQg9+Jr5GksTWWB8rd0uRMMUSSSd4+/u?=
 =?us-ascii?Q?9CEX2c1x3lmC6AuTJEvl2UDm9oOmUVfMbfSgy5f5JwymG9lGhIFSo9Q1bUsa?=
 =?us-ascii?Q?Ct1f7jberiF3yQShJsfAOIj3RdDm5wM+IrRRXz7syA4VcwGyzRtRqYFgVr98?=
 =?us-ascii?Q?mJeyaR3kLbEdRRUs7wwX0C+1xrUfIPEJKq3cS8YzZlDTbLyRvI4a2+d5oAAq?=
 =?us-ascii?Q?nlqcQixUHShYPG+lm62Rb0+trEJIGx8ER3fmPV2K2X0tVuHB2cjR+0GbS+S7?=
 =?us-ascii?Q?qC8dcmo+l9mGjY/3IgRjsyaZgpf5csyqw/Z0TePvYFuWBwCFHAFj0Sk2D392?=
 =?us-ascii?Q?Gl1J+oljxeRHGkjXC83LakZuPZ/pRe5DejhrMaoKUv5R0ZrUrXzwG9kmFtPb?=
 =?us-ascii?Q?zUHwxioO3zNiPuZTmd87ae5C+Kk+gICfbarT9JX+oROs4GESOos7aRkXnjlj?=
 =?us-ascii?Q?3qii1cW7gQ5lQcKfGX88FIGkVmtQMsPE+kkLoEX7Wjn2OWsMkdGM6cEueYOn?=
 =?us-ascii?Q?QVTRtSfc17pn0UtDooFexkqVDLzguvEQjwFQmwyFmFt4EpidGF0biVsa9Akd?=
 =?us-ascii?Q?SUDtZmCmipwLQJfWeLjWpCkZ6DtIlwAZeqUIqaaWHsxlmThLETB3jxXchFKl?=
 =?us-ascii?Q?K2LwN2K5mLVajeCODiu2hWfapWWucAjxQ1w+K6cjQGBBuM6uziA7vOAARrl2?=
 =?us-ascii?Q?ZkIgDeojkJ/ldDgby9ib1meaZX+fMGM5jO36lvfn6Ah7bygZF+E9KazDf9LQ?=
 =?us-ascii?Q?vh7boVcWFoc6an1lqpzm1DMPSuQS4MSN91+M8cvfBJXRtOQaEkJ4el3KQQu5?=
 =?us-ascii?Q?u5oDAAZtTVttGsQ4URldodhJyVTMMqYkd83ojewCu3LKVw/A7xQ71ISc3mMq?=
 =?us-ascii?Q?NXYXiozQLGPLiCSxfkOh1UAZiTWauRG60A8XOmkf+vGNbEvEWeePpPyzyh/f?=
 =?us-ascii?Q?TKgfb4tQv2pmHFno8/zGGWDzkkFlRkaC2lHvWVYo3MaW63PnlNZJi0KEeCGT?=
 =?us-ascii?Q?njb2K0MKsdGH3X+m30CmnFcHfFCg41hObCZZEilPDC3VwJoLZjqw0XwxfQDr?=
 =?us-ascii?Q?5xbolSKsqNGcVNCZ/XSA0kTUus1MdFZeXNJ8MKzC5Ty6UCVi2Nn4lBEMPIE7?=
 =?us-ascii?Q?RgMX8JfIX308YQdDIljsiFK3ifjAAHvm3Zakz79D?=
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-OriginatorOrg: microsoft.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: SA1PR21MB1335.namprd21.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 31173261-6a48-4786-954b-08db5d91d009
X-MS-Exchange-CrossTenant-originalarrivaltime: 26 May 2023 02:35:04.4844
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: ch0HHfqbcMTxFqmINpnfuBPeffCGvlOD08jK5eZIaO2ogQ1zhNpO4ayx6w3Jub3aw3zbFrgMcF6Kf8hk2BIoqA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR21MB3236
X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,
        DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,
        RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE
        autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

> From: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Sent: Thursday, May 25, 2023 3:59 PM
>  ...
> During review of TDX guests on Hyper-V patchset Dave pointed to the
> potential race between changing page private/shared status and
> load_unaligned_zeropad().
>=20
> Fix the issue.

Hi Kirill, I tested the patches on Hyper-V, and didn't find any issue.

Thanks for the patches! It looks like the patches can address Dave's
concerns. I'll wait for your patches to go in first, and then I'll rebase
my patches.

Thanks,
Dexuan