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:   =?utf-8?B?SE9SSUdVQ0hJIE5BT1lBKOWggOWPo+OAgOebtOS5nyk=?= 
        <naoya.horiguchi@nec.com>
To:     Miaohe Lin <linmiaohe@huawei.com>
CC:     "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 4/6] mm, hwpoison: fix possible use-after-free in
 mf_dax_kill_procs()
Thread-Topic: [PATCH v2 4/6] mm, hwpoison: fix possible use-after-free in
 mf_dax_kill_procs()
Thread-Index: AQHYtp/boXf1kMZ4skKbcQTJzvLWTq29NdCA
Date:   Wed, 24 Aug 2022 00:36:22 +0000
Message-ID: <20220824003621.GA811648@hori.linux.bs1.fc.nec.co.jp>
References: <20220823032346.4260-1-linmiaohe@huawei.com>
 <20220823032346.4260-5-linmiaohe@huawei.com>
In-Reply-To: <20220823032346.4260-5-linmiaohe@huawei.com>
Accept-Language: ja-JP, en-US
Content-Language: en-US
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?utf-8?B?YUFRM1ZuK2I1NWk2YmcrNFlxVXoyOGNlRjlIemNCc2wweEdEL0VPNEpZTVNT?=
 =?utf-8?B?YlBQR2xLTkVCL2QzaEhUTEt3SFdYR2doYTZ4dFVpTTFkWUF3MEl1UDAxZFov?=
 =?utf-8?B?Ym9EaTBsa1pQSmRmQXN0OEZUcGxyS1hFQUxIcWZtV2RORllYTXdqNGpTaThu?=
 =?utf-8?B?bnN1RnFvd2tYYVFMdW1lWlVXY3VGaURVRzg1TFJYYnE2cVBuQVFEZXZSNER1?=
 =?utf-8?B?WUZQR3FyMTFReXlJSW5ZZzF6SnBVZnZVQzBXc2VVOGM5NWxEbzQ3WG02TjlG?=
 =?utf-8?B?SkdwNDRzaUFmTTBxak80eTB5R2p2RHNueS9RKzhqWWl6N3hjRXF3YVVvdlBw?=
 =?utf-8?B?N1VVODlsWUxhbUVDU0pxeUVNUGV4ZXJvWlZYbEp3OFc2azExbkVpRkovYVN5?=
 =?utf-8?B?VzNuMkFjZFJOOExZV1czdkJ0U2VjY0VpVDg2dFZYRmtKdlc3K1lRSUFqaUZX?=
 =?utf-8?B?VmxmMk5UaFpIdXlOOG44dGZUbzAvUFpSK01xdVVlcXNnNTIrMVEzUm1WQjd6?=
 =?utf-8?B?b2hCeXBMam9oQjJUcXFRaTJrcXp3TVdJRFMzVE9ucHEreU5QMkQ2d3hwOTQ4?=
 =?utf-8?B?T0diRFdzYnlXRkNzVnUrcHpFVis5VTZxbGJIMDVQNGRvSGQxbFdXODBPMk5i?=
 =?utf-8?B?QklHbCtUUjJjZ0ZYemRwK25LbDhaUDVZSDExaEVFOEQ1YVFBTi9zWHdRV09l?=
 =?utf-8?B?TWVvdTNvZWVYU0pKdEM5czFHR1k4Z05DUUlWMTFQTzNJSCtnNE1XWSszY0pW?=
 =?utf-8?B?TVNDdTlWeWdQN3ZtY1Y2V3JMNXJJWTl4b1F6bW9Mc0hRKy82NXVJY0FJclZY?=
 =?utf-8?B?MXlyQTNHcHU1MTNIMzFrblpJVXJGaHNPb2NQdkk4UUpNdFRrR0krOTJVTDRE?=
 =?utf-8?B?SUNvMEExaWZGN0tibmJUaEdzVkZRSmU1Wjd3VXRJVmNKbVJxOTF0Nm1SUWJV?=
 =?utf-8?B?N1JYV2lmalFXWUZrVEQyNWIzSVRkMjY4UnZnb2FNb2ptbzV2c2Rpdk4yZ0ZK?=
 =?utf-8?B?L2ZvK0hMYzB2cDg5c0srZEFKM2dpMndDT2w4UlN2Ym5Qb2laOXlhRTJGYWRm?=
 =?utf-8?B?RWlORVUrNUw2cklWNldPemU4RlM2c3JYZmZPcXptSThjckczZndRNzJFY0RR?=
 =?utf-8?B?VWE3WnNQZGxYaHVFenFDbThXQkxNUEY2elRCc2RsMnp2MlRhRW51dExRTzFp?=
 =?utf-8?B?MWZxSXNxT2Q5Q1N1U0FCbkQ2OFoyQlZvZzZFWDVaWkFKQTdkVGlIQWtDZjNI?=
 =?utf-8?B?dEx5Yitac1E2Zk5ka1hPUlpIYVdxSzBYS0Jzcit0L0NzV1Vvc3VBVlNOek1R?=
 =?utf-8?B?L3hpVGF3ODBMK1BlNDlHWmxsN2ZENUlOWUpKaEhzamQyZC90b2d4VDJtY3ZY?=
 =?utf-8?B?UEw2T2pjTDBKTXlMN3JoalhQdG9yN25MYkxMSUZlVTdFdnJod0NsT2RIWGds?=
 =?utf-8?B?d2Z3dlI5QWxWR2Z5TWlmZGd1K1NiMnJDZDhtMDZQS2loUjd1TUJmY05NYkNi?=
 =?utf-8?B?RHFINFR2Y01MZTBWVlpVNjloQVhNdndjNWFGTk1jaUxqRnA4NWdsMDVscnE0?=
 =?utf-8?B?WHBmOUZUdXprbkZSV21hcGxONmtPSE1RY0Zqa1k1M2c2QlI3Tll6ZVJ6ZGZD?=
 =?utf-8?B?a1kzTUlFVXNRVHZLUWwvMm9HWnhieHZ6Q2d0bUNRV3VBNmc1c24xeWZSRDI0?=
 =?utf-8?B?Wi9JMGluRStKZmw1QzQ3ZGNGZkZSWlZpcWkyb2ptSHBMWHljTWhMa0xLYzI5?=
 =?utf-8?B?SWJ2d0lhNHNRSEJsOU45U3Rwd0xiVnJ0ekprbjhmSFRJVUtnUjFpZnhkNU83?=
 =?utf-8?B?VFZmT2k0cFovV2Q5TkJLRGc2UDBMS1FWa0U5ZG9EWVdtVC9GUGthMHVyMUVF?=
 =?utf-8?B?TjlYa1pZQzJhd1Btd091ODF1QjdWYVNuSXFITXpWQUxvOFc3NjhpeGhZRkJY?=
 =?utf-8?B?VFNLeG9xUmMvcnZiWnNkVHplSU8yRFpBYmFVTHRBK3VwbkFKa01Yc0xDUjZj?=
 =?utf-8?B?cGpvQzVzaUxDVzhWVXJEUWpTaDdhTXNsNWg4U1J3S1BTYXVkdjk3L0xLcUZB?=
 =?utf-8?B?blhnMHVPbnhKcG8zY0M0cEpCa0J2SVVmQ3pHOU9RclFjN1ZKMmlKdGxkV3Ri?=
 =?utf-8?B?NytqQ0N4c2c5bi9JM2JCRHFlSFBDaGMzWlo2N2NXVVJXb3RnWkVCYlZqT2p4?=
 =?utf-8?B?OUE9PQ==?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <243BBEC7E3F2AB4BB95309D7198FC231@jpnprd01.prod.outlook.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-OriginatorOrg: nec.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: TYWPR01MB8591.jpnprd01.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 4329fb68-20c4-4647-fca2-08da8568ab24
X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Aug 2022 00:36:22.0611
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: e67df547-9d0d-4f4d-9161-51c6ed1f7d11
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: fzevAWyKG7aWVnGUW/3Huy7mpNFErSpLzEJfW7vOpnK/+xEwyq8dhwRyc8q7F2FPHYZMEr8q10kJqCDr032LAw==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: OSBPR01MB2871
X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,
        RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS,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
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