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:   Jane Chu <jane.chu@oracle.com>
To:     Petr Mladek <pmladek@suse.com>
CC:     Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        "rostedt@goodmis.org" <rostedt@goodmis.org>,
        "senozhatsky@chromium.org" <senozhatsky@chromium.org>,
        "linux@rasmusvillemoes.dk" <linux@rasmusvillemoes.dk>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        Haakon Bugge <haakon.bugge@oracle.com>,
        John Haxby <john.haxby@oracle.com>,
        Konrad Wilk <konrad.wilk@oracle.com>,
        Jane Chu <jane.chu@oracle.com>
Subject: Re: [PATCH v2] vsprintf: protect kernel from panic due to
 non-canonical pointer dereference
Thread-Topic: [PATCH v2] vsprintf: protect kernel from panic due to
 non-canonical pointer dereference
Thread-Index: AQHY4mDwWLEpoK21xU2/k+8Paef3ha4TCOCAgAAMkoCAAK+5gIAAx/YAgADp5oCAAK+sgIAAUyuA
Date:   Thu, 20 Oct 2022 01:00:15 +0000
Message-ID: <a967a880-5196-954e-817f-50372a44a159@oracle.com>
References: <20221017194447.2579441-1-jane.chu@oracle.com>
 <Y026l2PZgvt+G6p0@smile.fi.intel.com>
 <71c9bce7-cd93-eb2f-5b69-de1a9ffe48b5@oracle.com> <Y05Yi7xJ3E8EjnTj@alley>
 <288a7aba-c647-b51f-bdb3-99a62449dbb3@oracle.com> <Y0/EfVB7fRFXrz2c@alley>
 <860872bd-127f-36ee-f803-6553a6f03826@oracle.com>
In-Reply-To: <860872bd-127f-36ee-f803-6553a6f03826@oracle.com>
Accept-Language: en-US
Content-Language: en-US
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101
 Thunderbird/91.13.1
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?utf-8?B?S1d5OVJGenA2cnZ0VmdIdnQ2R2dQQ2ZQWlF5RVB2M1l6MDdodEQ1ZERPak1M?=
 =?utf-8?B?bHNGTTRTMVc2V1ZDbnQ0UkkwVU5CL3ZwTEZHQmxtV2xOR21YYkZpWnVKa3FT?=
 =?utf-8?B?anA5Rjg2TUM5YUthTmF6dFkxTko2QkVGUVJocTdqNjQvSUhTY3FzcDJrbjNy?=
 =?utf-8?B?UHdybE5xSm50ZXFsMzZyNm9vOUlKTnJydDhPMzR3dys5RW5WUGhvZmJnU2xt?=
 =?utf-8?B?SzFwKzc3eXV5VUV5MWlBb3V3WUE1a2VhNytybmJWVFlpRnZpN0RTbFF6RXox?=
 =?utf-8?B?bkhJM0RwaWswakVyU0JwbUV5T244b0xWc3JSck9ER1FScnIxNlMwM1hTZmtl?=
 =?utf-8?B?MlRxTFZIaFlkQlFrMElTbHloQ1hNWklpSk1jZGVPMTBLd2pZa2RkOVYxMDN3?=
 =?utf-8?B?OXB0NHdmQmFXV1ZtUVNKa0FtNzRHSS9sTFJMTkRlaHN0YjJnT2ZiaXdvL2hq?=
 =?utf-8?B?aDJaS05oOG9KM2p5R2JaSCthV1FhVUJNQW5ITHBNQmplNExXQ1IwR043MzNH?=
 =?utf-8?B?L05UMTFEVTk1bzFzSksyaHRqZXcxMTlDU0VhRjhkUm02a2NzU1hOT2x3QUxB?=
 =?utf-8?B?WWsrV0tGT1JaVy9hT2NCZkl3c3RJbFRqSlpwNmNTd2R4dGZQNUFGRTdING1i?=
 =?utf-8?B?dzdDV3FQbEJFTVhrdmVBZmxwbUlOWGJJWFZSYlZvWjhwY0lzcUpXakZOb1lx?=
 =?utf-8?B?R3ErZ1FVV1VKSkpuZUZLS3JzSTAyUWlRUmowV0dGRjk3NTM1T012OWJKQnF2?=
 =?utf-8?B?V3hvQTN1NEROSlN3VE1qeUhiVGQza1RqeVdQNGI3SW9kc1lHZXk1OUwwdUNv?=
 =?utf-8?B?azZNc2Y1Z3hkT2c0YzlQcXg1QU9aY2xsdi9SOXNhYjV2MFBJd2t2MHhZRFpJ?=
 =?utf-8?B?MUhiSmN6OTJQLzFJODl6dlJYK0xWcGg1ck5mZzFONFQ1MHAvUHhXZTZWcHJU?=
 =?utf-8?B?U3hOS05nekZrS29ubmF5VmJ0a0I5WHNlUmlNdHBtVkEwdkpEVWVjYkVYWitm?=
 =?utf-8?B?cUs0Mk0xUDNmQWp5OUJBa3RiNm9WZ2ZHNDB5UDVKYlI4dUVnMXFqeUdOcWRt?=
 =?utf-8?B?U3ZIdlgvcGgrcWVLWXdYVHRXRWpydlVVT1FzUkR5SmN6RlVnbmE4WnV4UFdr?=
 =?utf-8?B?SHgwRlA2Zm9rQzl0M3hjd2dkNkN1UTd2am1PZUl6emgyWlhQc2NIQzArYkc2?=
 =?utf-8?B?c0FYTkNFQjVPTndjNzJIWHZQWkUyWEh3WGJjdFVoN0dueDdTNzJZSk9KUkhR?=
 =?utf-8?B?bzYxZkZtbmJDcjFTbUNVVkdDZWtsa3QzSHVXSjVtOC9wRFFMQXk0aUk0anlP?=
 =?utf-8?B?ZGE2OVFJRno0czEyUEhJT1ZSUmdOZEVTYWJKOElhN0hpdC85TEdUVXBwT29o?=
 =?utf-8?B?aWJzcTdOYkhHOHlYdGF3NVRqMUFveU9aSExJWnZ1R2JRT1B3eDQrT09Qa0tm?=
 =?utf-8?B?RlJhRDk4VnlSZ24xYjhaRjBHUWZFd2N5WTVocFh2WmFGRGR3VkZTb0w5KzM5?=
 =?utf-8?B?a3oxNGpGRHZoczkxb0t6eGNEQmJMcEgySndwSG5FUmhuTXUwY3FSWlVDZUsw?=
 =?utf-8?B?M08xdkpSbFpvUXFiWTlRTEdmcjcxVlhEZnhnMHE2UHpRYXh5bnR4WitjYXZK?=
 =?utf-8?B?N3hsWmFheFFSM1UyQVlFNlBjRFU2NFJmOHB6V3dnaFhybDE3Q2RaZ3RKd3lJ?=
 =?utf-8?B?NGpvZnprZzBGdk11RXlZc1NCRE9nNzJ6L0tCTE9wYmxGUWJkdlRJQkFFdWM5?=
 =?utf-8?B?bHllTWkrVXZXZkxpejZOU2p0RGorcmE0b24zbUdGU0EyeWN2SksvaEFjKzJu?=
 =?utf-8?B?L0cwNE50N2N4VzZGM0pQVjRxUEZITmUzTVdPNzZTSVdRUlE4ZmVIUHlJZHpq?=
 =?utf-8?B?VDFHYVR6UTdIb0JUdXNnc2M1cHdpVERKcy9YRzN5ck1nbXZncFdybzdYc3Mr?=
 =?utf-8?B?Mld6OUlVV0wxay9nNURxdWZkaWROQWc4UlFiUkxhMDUvU0tEcEhMYzJvUXZk?=
 =?utf-8?B?WGIxUnI4d3drWUtNM0dsdUFBb3RPRUZaSW1WeWRvdHBkN2hiZjVNUnBRYmRk?=
 =?utf-8?B?UDdUNW5NUzdRbTQ0N0YzVVdxK3FHaHRab2pIVzN4UTNlMGdla2FNNjZMUGJz?=
 =?utf-8?Q?6T1EjtLgmptZaP5iyeo9vBrfk?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <A37E2B622DE6634CB10B277CFC83C79C@namprd10.prod.outlook.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-OriginatorOrg: oracle.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: SJ0PR10MB4429.namprd10.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 0e3f824f-5191-4928-0d8a-08dab2367355
X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Oct 2022 01:00:15.8497
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: gHvpSkZMDIBivVifN83YFet96/e4PXag4s77a7vcvrrmJZUtZPUSIIyMO8uXcq6AipnmyLhaP29J85TfpTqpOQ==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR10MB4113
X-Proofpoint-Virus-Version: vendor=baseguard
 engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1
 definitions=2022-10-19_13,2022-10-19_04,2022-06-22_01
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 spamscore=0 bulkscore=0
 mlxscore=0 phishscore=0 suspectscore=0 adultscore=0 mlxlogscore=999
 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000
 definitions=main-2210200004
X-Proofpoint-GUID: 9uxS2grXFraXnOTgRO0mnv9I3ZgIPXc0
X-Proofpoint-ORIG-GUID: 9uxS2grXFraXnOTgRO0mnv9I3ZgIPXc0
X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_DNSWL_LOW,
        RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE 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
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=