Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) client-ip=2620:137:e000::3:7;
From:   "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
To:     "broonie@kernel.org" <broonie@kernel.org>
CC:     "dietmar.eggemann@arm.com" <dietmar.eggemann@arm.com>,
        "keescook@chromium.org" <keescook@chromium.org>,
        "Szabolcs.Nagy@arm.com" <Szabolcs.Nagy@arm.com>,
        "shuah@kernel.org" <shuah@kernel.org>,
        "dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
        "debug@rivosinc.com" <debug@rivosinc.com>,
        "mgorman@suse.de" <mgorman@suse.de>,
        "brauner@kernel.org" <brauner@kernel.org>,
        "fweimer@redhat.com" <fweimer@redhat.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "vincent.guittot@linaro.org" <vincent.guittot@linaro.org>,
        "hjl.tools@gmail.com" <hjl.tools@gmail.com>,
        "rostedt@goodmis.org" <rostedt@goodmis.org>,
        "mingo@redhat.com" <mingo@redhat.com>,
        "tglx@linutronix.de" <tglx@linutronix.de>,
        "vschneid@redhat.com" <vschneid@redhat.com>,
        "catalin.marinas@arm.com" <catalin.marinas@arm.com>,
        "bristot@redhat.com" <bristot@redhat.com>,
        "will@kernel.org" <will@kernel.org>,
        "linux-api@vger.kernel.org" <linux-api@vger.kernel.org>,
        "hpa@zytor.com" <hpa@zytor.com>,
        "peterz@infradead.org" <peterz@infradead.org>,
        "jannh@google.com" <jannh@google.com>,
        "bp@alien8.de" <bp@alien8.de>,
        "bsegall@google.com" <bsegall@google.com>,
        "linux-kselftest@vger.kernel.org" <linux-kselftest@vger.kernel.org>,
        "Pandey, Sunil K" <sunil.k.pandey@intel.com>,
        "x86@kernel.org" <x86@kernel.org>,
        "juri.lelli@redhat.com" <juri.lelli@redhat.com>
Subject: Re: [PATCH RFC RFT v2 2/5] fork: Add shadow stack support to clone3()
Thread-Topic: [PATCH RFC RFT v2 2/5] fork: Add shadow stack support to
 clone3()
Thread-Index: AQHaFzYai+mxslqXM0i150aoxWGrvrB6i7UAgADGr4CAAD5nAIAAKB6AgABm6gCAASMjgIAABXqA
Date:   Thu, 16 Nov 2023 18:33:47 +0000
Message-ID: <282e637f136b80b352e261514c4102266e92c112.camel@intel.com>
References: <20231114-clone3-shadow-stack-v2-0-b613f8681155@kernel.org>
         <20231114-clone3-shadow-stack-v2-2-b613f8681155@kernel.org>
         <c9434fa9d864612ed9082197a601c5002ed86a38.camel@intel.com>
         <d873072c-e1f4-4e1f-9efc-dfbd53054766@sirena.org.uk>
         <ZVTvvJTOV777UGsP@arm.com>
         <d90884a0-c4d3-41e9-8f23-68aa87bbe269@sirena.org.uk>
         <d05d23d56bd2c7de30e7732e6bd3d313d8385c47.camel@intel.com>
         <2b4b935e-aea1-4283-a459-5d6004b24b28@sirena.org.uk>
In-Reply-To: <2b4b935e-aea1-4283-a459-5d6004b24b28@sirena.org.uk>
Accept-Language: en-US
Content-Language: en-US
user-agent: Evolution 3.44.4-0ubuntu2 
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?utf-8?B?YnpESXdyeXJKbE1UQW1Va2VtaWQ3dm9hbEp1amJOTm0xaVdPVXZuZWUrK1Nx?=
 =?utf-8?B?WFMzaUVVRWlPbU1qS3VvS2swb0Y1MUdlWVE4d1dMRWFmeGNQYlVEWlpBWmdj?=
 =?utf-8?B?NkcvMitlTnc4ZGdCbTA3L1Q2T3RvYzJHMEJ3ajh2cGJENzRsRzJUdzduOU5m?=
 =?utf-8?B?R0JZQlpOOEVjTk82elcvZ3g5bklCbUhnSXpyRkNpS3dDR3R4M0wvYXpsbDlJ?=
 =?utf-8?B?aDkxODhnbWtvTHpybFpSZHZUaUh3amEvUGZhNTZBY0lDQWtCUkJtNElxaTU2?=
 =?utf-8?B?ekFicVlFMkk5empzWkZ0Uk5QUzZpcjN1VzJTSUcwTitMYmRleWVjMlBXeW5R?=
 =?utf-8?B?NHZBKzdPUzJWem51cWxoUDlxOEY1MXJRTkhxbytJbTA1SCtVWWJ0T2w5YWZ2?=
 =?utf-8?B?Z2tVQ3VrTUJCZHJobDNnWUs2YlZyZkdNL081SlNWKzJ3YTZBK0dhSEVtaVZI?=
 =?utf-8?B?R3VhVi8xZnROWDBJUVRMYVlIVmFEVnVvTmtDZlY5bXM5NG9uZUEvMFM0THR0?=
 =?utf-8?B?aVlkMlhOV2NoSE1JQ3RScHJnVENvVG83b1FEalhEYkVzMm9tZTJkbXZpeXJh?=
 =?utf-8?B?eHFDTk9hRXlHYzhNamt1RVpVL1NOZWFiSklxK3FNaWQ0NlVQanNiTVlnaFVj?=
 =?utf-8?B?dm9ubDJnd21LTHA3dlp0OGtLWHc1cGswK2tYMEkzL29TT3NWS1RIWVlqUGs0?=
 =?utf-8?B?cDlQbHV0d3E4U1VEVXpySDVhc0xydWVIWlBVdUMzbXEyNFgvRlRONGR6ZjFa?=
 =?utf-8?B?QVNza1BaS1l1TS9XTmc4OUJYRG9VTU5lbnZRODRMSER1KzhDcXFKMHNvK08z?=
 =?utf-8?B?dGRlM2JOOVlZUUxlTkloYU9vREU2cHNhRjNRK0xQTVZlSUp2ejBVSk5aSkVR?=
 =?utf-8?B?aFlRWDh4T1c1TitsRGxzK1J1czhOMGxRcGRtWjdzWTd5dHVUNjRYYjR6MzBK?=
 =?utf-8?B?RmlSSXExSnRyZ09zLzEzL0w5eFV6NzIyNzFZRUVsbENqOWJNZ3JWUVJsMDl4?=
 =?utf-8?B?eGpjcE5Zd3dlOUg0ellWYmx4TnZKWUJKZU5mOTRHSzVCNWF6TkxxRjB5cGFq?=
 =?utf-8?B?cUp6YnhyYlRGckJkZ1N0Vy9NQklERHp5RzF6ZXZrbHZ5bkpRTmVUYnE2b0p0?=
 =?utf-8?B?RC9oZiszUk5qaXJIVE9KT25mVVdBcHpTcXdvUWFRS2pNZmV4aWl3Q2R3TlA5?=
 =?utf-8?B?VEQzeUxtYmJYRlF0NmwxTzdPYW5uQ2RIY0NmNVZpZVJJODBQN1IxcVJsM1Nw?=
 =?utf-8?B?TDZWVU5OdzVvT1FPNWJ1b0V4U2lVRlk3R1lNc3FLSkZOaWRMem5SaDB4N0hF?=
 =?utf-8?B?aFJHQ2tzb25vandvL2dpeE9RczNaNEFjMWpGYk8wcCtRM2lMTlZ3cHJYT0o0?=
 =?utf-8?B?TXluUFd6em9mTWZFOUg2NUl0NDlaVG51WVM3dGwvUDhNZjlUc1A2aEtZY3E4?=
 =?utf-8?B?WkplZm4vank5RUFhZG1jTGVDbVQwanh1R0szWjFjVlpaRTRWZ3JseVF1dXRL?=
 =?utf-8?B?T1FQdW53Q1VINlVLZFF2WDVuQnh1UmFoZndUbENKc1hDQkZPSCtlMWFTTkJG?=
 =?utf-8?B?QWNDSTZYb2hPN29GN1l4WjYydllpckUvNXU1c3A4WEpVek9pZ0tqQyswMi9M?=
 =?utf-8?B?WEo5WUp1U1d4Rk1rSUY2RHYveHV0KzNtWHpVNUhvQ2VsSkYxU1VndDlBSXRM?=
 =?utf-8?B?OTE0bUZLclk1RjlqOVBMQk5qdnJTRVR5UXoxWG5yV3ZMcGNYT3JMSUpMUFNv?=
 =?utf-8?B?NDJuKzgrSFJHcUNPRFIvNlBNSUg4MjVoYWxoM2E5YmdUSjVuT09iK0gxL2xp?=
 =?utf-8?B?c3A0UUhzS003SkVhbFlUd1lCWFYrc2xhUjR6VU5aUCtuWWx2Q1NDZmo2ZlpM?=
 =?utf-8?B?ZVhSbzQyckI5aUtTeVJpemRER2xIa2FJWFplUGZ2OWkzRlE5Y2xDaWdqZEFE?=
 =?utf-8?B?UUY4OFRqcTNKejlVb1NDajFobitwRFhEL3Q4YUNvMWtrbDRlYlp5SGVPV1da?=
 =?utf-8?B?ZEdUQ0lhVVNSQ08zWWUxRlhIV2dxcFQwN0VZOFl0Rlh5YWhZU2FEQVdVYm53?=
 =?utf-8?B?WENzMmxWQUI2UnBPMzhSUVFTUVdITmJqY212c2s3WEo0Z2hiMkE2RHBxbmVt?=
 =?utf-8?B?QjFscXVtWlV1Zk1NV2VQTEZpYm9pY1gzdHl2OHhKdUg3OUt5WWRHUmppNTVI?=
 =?utf-8?B?a1E9PQ==?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <E9338E32740CCE4A8CEFF5AFB0AD066F@namprd11.prod.outlook.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: MN0PR11MB5963.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 3c7a969c-77f9-4cf9-2ed6-08dbe6d2924b
X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Nov 2023 18:33:47.4757
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: 4LoVWqT2HYxaC4M3jNnzSk52MeOzmifvQGPOD2M8xMiD8URNsyGaPHVuPNLE5mL+NHRdH8NHoeQzTNiXGObSKDyuz/CVY74PiNl+sS5YTp4=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR11MB6251
X-OriginatorOrg: intel.com
X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,
        DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,
        SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED 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
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Thu, 16 Nov 2023 10:34:01 -0800 (PST)
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=