From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 968EEC433EF for ; Tue, 14 Sep 2021 08:14:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7193C604AC for ; Tue, 14 Sep 2021 08:14:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230007AbhINIPc (ORCPT ); Tue, 14 Sep 2021 04:15:32 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:46132 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229483AbhINIPb (ORCPT ); Tue, 14 Sep 2021 04:15:31 -0400 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-228-4zbg9E4KPh6_KsOvdYrc_g-1; Tue, 14 Sep 2021 09:14:12 +0100 X-MC-Unique: 4zbg9E4KPh6_KsOvdYrc_g-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Tue, 14 Sep 2021 09:14:11 +0100 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.023; Tue, 14 Sep 2021 09:14:11 +0100 From: David Laight To: "'libaokun (A)'" , Nick Desaulniers , Linus Torvalds CC: Arnd Bergmann , Sedat Dilek , Greg Kroah-Hartman , Naresh Kamboju , Nathan Chancellor , open list , linux-stable , Hulk Robot , Josef Bacik , Jens Axboe , Sasha Levin , clang-built-linux , "lkft-triage@lists.linaro.org" , "llvm@lists.linux.dev" , Kees Cook Subject: RE: [PATCH 5.14 018/334] nbd: add the check to prevent overflow in __nbd_ioctl() Thread-Topic: [PATCH 5.14 018/334] nbd: add the check to prevent overflow in __nbd_ioctl() Thread-Index: AQHXqQ4eXbMSnUIpgkqOMblgrD/eTKujLcBA Date: Tue, 14 Sep 2021 08:14:10 +0000 Message-ID: <27e1c6de36354620aaf8ed5a5fa944de@AcuMS.aculab.com> References: <20210913131113.390368911@linuxfoundation.org> In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Li4uDQo+ICDCoMKgwqDCoMKgwqDCoCBjYXNlIE5CRF9TRVRfU0laRToNCj4gIMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoCByZXR1cm4gbmJkX3NldF9zaXplKG5iZCwgYXJnLCBjb25maWct PmJsa3NpemUpOw0KPiAgwqDCoMKgwqDCoMKgwqAgY2FzZSBOQkRfU0VUX1NJWkVfQkxPQ0tTOg0K PiAtwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBpZiAoY2hlY2tfbXVsX292ZXJmbG93KChs b2ZmX3QpYXJnLCBjb25maWctPmJsa3NpemUsDQo+ICZieXRlc2l6ZSkpDQo+ICvCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgIGlmIChhcmcgJiYgKExMT05HX01BWCAvIGFyZyA8PSBjb25maWct PmJsa3NpemUpKQ0KPiAgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoCByZXR1cm4gLUVJTlZBTDsNCj4gLcKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgcmV0 dXJuIG5iZF9zZXRfc2l6ZShuYmQsIGJ5dGVzaXplLCBjb25maWctPmJsa3NpemUpOw0KPiArwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCByZXR1cm4gbmJkX3NldF9zaXplKG5iZCwgYXJnICog Y29uZmlnLT5ibGtzaXplLA0KPiArwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgY29uZmlnLT5ibGtzaXplKTsNCg0KU2hv dWxkbid0IHRoZXJlIGp1c3QgYmUgc2FuaXR5IGJvdW5kIGNoZWNrcyBvbiAnY29uZmlnLT5ibGtz aXplJyBhbmQNCidhcmcnIHNvIHRoYXQgdGhlIHByb2R1Y3QgaXMgbmV2ZXIgZ29pbmcgdG8gb3Zl cmZsb3c/DQoNCkl0IGlzbid0IGFzIHRob3VnaCBhbnkgdmFsdWVzIG5lYXIgdGhlIG92ZXJmbG93 IGxpbWl0IGFyZSBzYW5lLg0KDQpJIHN1c3BlY3QgeW91IGNvdWxkIGNoZWNrIGNvbmZpZy0+Ymxr c2l6ZSA8PSA2NGsgJiYgYXJnIDw9IDMyaw0KYW5kIGV2ZW4gdGhhdCB3b3VsZCBiZSBnZW5lcm91 cy4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBS b2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9u IE5vOiAxMzk3Mzg2IChXYWxlcykNCg==