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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 5AD78C433E9 for ; Wed, 27 Jan 2021 12:27:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 13C422070E for ; Wed, 27 Jan 2021 12:27:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237866AbhA0M1m (ORCPT ); Wed, 27 Jan 2021 07:27:42 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:49546 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S314021AbhAZWzR (ORCPT ); Tue, 26 Jan 2021 17:55:17 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-76-30NQJlUXPP2CXDT06Y_EHA-1; Tue, 26 Jan 2021 22:53:34 +0000 X-MC-Unique: 30NQJlUXPP2CXDT06Y_EHA-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 26 Jan 2021 22:53:31 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Tue, 26 Jan 2021 22:53:31 +0000 From: David Laight To: 'Nick Desaulniers' , Candle Sun CC: "keescook@chromium.org" , "arnd@arndb.de" , "gregkh@linuxfoundation.org" , "natechancellor@gmail.com" , "candle.sun@unisoc.com" , "linux-kernel@vger.kernel.org" , "clang-built-linux@googlegroups.com" Subject: RE: [PATCH] lkdtm: fix memory copy size for WRITE_KERN Thread-Topic: [PATCH] lkdtm: fix memory copy size for WRITE_KERN Thread-Index: AQHW8v+fVpSBFdR3bUKo3QkF9iGP/qo4I1KAgAIcALWAAEXe8A== Date: Tue, 26 Jan 2021 22:53:31 +0000 Message-ID: <9b48470af3b841e4bd8ba15a4ee5e745@AcuMS.aculab.com> References: <20210125085622.2322-1-candlesea@gmail.com> <97d1f36a3b534b7fbd3790a0277ccaf5@AcuMS.aculab.com> 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 RnJvbTogTmljayBEZXNhdWxuaWVycw0KPiBTZW50OiAyNiBKYW51YXJ5IDIwMjEgMTg6NDANCj4g DQo+IE9uIFR1ZSwgSmFuIDI2LCAyMDIxIGF0IDY6MTMgQU0gQ2FuZGxlIFN1biA8Y2FuZGxlc2Vh QGdtYWlsLmNvbT4gd3JvdGU6DQo+ID4NCj4gPiBPbiBNb24sIEphbiAyNSwgMjAyMSBhdCA2OjM3 IFBNIERhdmlkIExhaWdodCA8RGF2aWQuTGFpZ2h0QGFjdWxhYi5jb20+IHdyb3RlOg0KPiA+ID4N Cj4gPiA+IEZyb206IENhbmRsZSBTdW4NCj4gPiA+ID4gU2VudDogMjUgSmFudWFyeSAyMDIxIDA4 OjU2DQo+ID4gPiA+DQo+ID4gPiA+IEZyb206IENhbmRsZSBTdW4gPGNhbmRsZS5zdW5AdW5pc29j LmNvbT4NCj4gPiA+ID4NCj4gPiA+ID4gVGhvdWdoIGRvX292ZXJ3cml0dGVuKCkgZm9sbG93cyBk b19ub3RoaW5nKCkgaW4gc291cmNlIGNvZGUsIHRoZSBmaW5hbA0KPiA+ID4gPiBtZW1vcnkgYWRk cmVzcyBvcmRlciBpcyBkZXRlcm1pbmVkIGJ5IGNvbXBpbGVyLiBXZSBjYW4ndCBhbHdheXMgYXNz dW1lDQo+ID4gPiA+IGFkZHJlc3Mgb2YgZG9fb3ZlcndyaXR0ZW4oKSBpcyBiaWdnZXIgdGhhbiBk b19ub3RoaW5nKCkuIEF0IGxlYXN0IHRoZQ0KPiA+ID4gPiBDbGFuZyB3ZSBhcmUgdXNpbmcgcGxh Y2VzIGRvX292ZXJ3cml0dGVuKCkgYmVmb3JlIGRvX25vdGhpbmcoKSBpbiB0aGUNCj4gPiA+ID4g b2JqZWN0LiBUaGlzIGNhdXNlcyB0aGUgY29weSBzaXplIGluIGxrZHRtX1dSSVRFX0tFUk4oKSBp cyAqcmVhbGx5Kg0KPiA+ID4gPiBiaWcgYW5kIFdSSVRFX0tFUk4gdGVzdCBvbiBBUk0zMiBhcmNo IHdpbGwgZmFpbC4NCj4gPiA+ID4NCj4gPiA+ID4gQ29tcGFyZSB0aGUgYWRkcmVzcyBvcmRlciBi ZWZvcmUgZG9pbmcgdGhlIHN1YnRyYWN0aW9uLg0KPiA+ID4NCj4gPiA+IEl0IGlzbid0IGNsZWFy IHRoYXQgaGVscHMuDQo+ID4gPiBDb21waWxlIHdpdGggLWZmdW5jdGlvbi1zZWN0aW9ucyBhbmQv b3IgZG8gTFRPIGFuIHRoZXJlDQo+ID4gPiBpcyBubyByZWFzb24gYXQgYWxsIHdoeSB0aGUgZnVu Y3Rpb25zIHNob3VsZCBiZSB0b2dldGhlci4NCj4gPiA+DQo+ID4gPiBFdmVuIHdpdGhvdXQgdGhh dCBsa2R0bV9XUklURV9LRVJOKCkgY291bGQgZWFzaWx5IGJlIGJldHdlZW4gdGhlbS4NCj4gPiA+ DQo+ID4gPiBZb3UgbmVlZCB0byBnZXQgdGhlIHNpemUgb2YgdGhlICdlbXB0eSBmdW5jdGlvbicg ZnJvbSB0aGUNCj4gPiA+IHN5bWJvbCB0YWJsZS4NCj4gPiA+DQo+ID4gPiAgICAgICAgIERhdmlk DQo+ID4NCj4gPiBUaGFua3MgRGF2aWQuDQo+ID4NCj4gPiBJIHRoaW5rIHVzaW5nIGFicygpIGJ5 IE5pY2sncyBhZHZpY2Ugd291bGQgYmUgYmV0dGVyLiBCdXQgY291bGQgeW91DQo+ID4gcG9pbnQg b3V0IHdoaWNoIGtlcm5lbCBmdW5jdGlvbiBjYW4gZ2V0IGZ1bmN0aW9uIHNpemU/DQo+IA0KPiBU aGUgRWxmIHN5bWJvbCB0YWJsZSBzaG91bGQgY29udGFpbiB0aGlzIGluZm8sIElJVUMuDQo+IA0K PiBHaXZlbiBhIHN0cmluZyBsaXRlcmFsIG9mIGEgc3ltYm9sIChzdWNoIGFzIGEgZnVuY3Rpb24g aWRlbnRpZmllciksDQo+IGthbGxzeW1zX2xvb2t1cF9uYW1lKCkgY2FuIGJlIHVzZWQgdG8gcmV0 dXJuIGl0cyBhZGRyZXNzLg0KPiANCj4gRnJvbSB0aGVyZSB3ZSdkIHdhbnQgdG8gZmV0Y2ggdGhl IEVsZl9TeW0gZm9yIHRoZSBhZGRyZXNzIHdoaWNoIHNob3VsZA0KPiBjb250YWluIGEgc3Rfc2l6 ZSBmaWVsZCB3aGljaCBJIHRoaW5rIGNvcnJlc3BvbmRzIHRvIHRoZSBzaXplIGluIGJ5dGVzDQo+ IG9mIHRoZSBmdW5jdGlvbi4gIChBdCBsZWFzdCwgZnJvbSBwbGF5aW5nIHdpdGggYGxsdm0tcmVh ZGVsZiAtc2ApDQo+IFByb2JhYmx5IHdvdWxkIHdhbnQgdG8gdmFsaWRhdGUgaXQncyBhbiBTVFRf RlVOQyBzeW1ib2wgdHlwZSwgdG9vLiAgV2UNCj4gYmFzaWNhbGx5IHdhbnQgc29tZXRoaW5nIGxp a2Uga2V4ZWNfcHVyZ2F0b3J5X2ZpbmRfc3ltYm9sKCksIGJ1dCB0aGF0DQo+IGtub3dzIGFib3V0 IHRoZSBlbnRpcmUga2VybmVsIGltYWdlLCBhbmQgbm90IHRoZSBwdXJnYXRvcnkgaW1hZ2UgdXNl ZA0KPiBkdXJpbmcga2V4ZWMuICBJIGRvbid0IHNlZSBhbnkgc3VjaCBmdW5jdGlvbiBjdXJyZW50 bHkgaW4gdGhlDQo+IGtlcm5lbC4uLmJ1dCBpdCdzIGEgbGFyZ2UgY29kZWJhc2UgdG8gc2VhcmNo IHRocm91Z2guDQoNClRoZSBhbHRlcm5hdGl2ZSBpcyB0byBnZXQgdGhlIGxpbmtlciBzY3JpcHQg dG8gZGVmaW5lIGEgc3BlY2lmaWMNCmNvbnN0YW50IHRvIHRoZSBzaXplIG9mIHRoZSBmdW5jdGlv bi4NCllvdSBjYW4gdGhlbiBsaW5rIGFnYWluc3QgaXQgKGJ5IHVzaW5nIGl0IGFzIHRoZSBhZGRy ZXNzIG9mIGEgc3ltYm9sKS4NCg0KSXQgbWF5IGJlIGVhc2llciB0byB1c2UgYW4gYXNtIGZpbGUg Zm9yIHRoZSAncmV0dXJuIDAnIGNvZGUuDQpJJ20gZ3Vlc3NpbmcgdGhlcmUgYXJlIHRoaW5ncyBp biB0aGUgc3RhdGljIGJyYW5jaCBhcmVhDQp0aGF0IGNvdWxkIGJlIHVzZWQuDQoNCglEYXZpZA0K DQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFy bSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAo V2FsZXMpDQo=