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, 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 AC5E9C433E0 for ; Wed, 6 Jan 2021 09:44:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D74C2310B for ; Wed, 6 Jan 2021 09:44:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726405AbhAFJoO (ORCPT ); Wed, 6 Jan 2021 04:44:14 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:42587 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726308AbhAFJoN (ORCPT ); Wed, 6 Jan 2021 04:44:13 -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-134-GOWJFpBUNTOJhoaGXAnJhw-1; Wed, 06 Jan 2021 09:42:34 +0000 X-MC-Unique: GOWJFpBUNTOJhoaGXAnJhw-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; Wed, 6 Jan 2021 09:42:33 +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; Wed, 6 Jan 2021 09:42:33 +0000 From: David Laight To: 'Andy Lutomirski' CC: "Eric W. Biederman" , Al Viro , Christoph Hellwig , "linux-kernel@vger.kernel.org" , X86 ML Subject: RE: in_compat_syscall() on x86 Thread-Topic: in_compat_syscall() on x86 Thread-Index: AQHW4tnp52+Fp/HYSH2MXxqk00t/OqoYCInQgAANioCAALOoMIAAgtuAgABZLEA= Date: Wed, 6 Jan 2021 09:42:33 +0000 Message-ID: <113ae3678beb4d33882506a85b398362@AcuMS.aculab.com> References: <091174F9-F6E4-468E-83F5-93706D83F9D2@amacapital.net> <9108ae60809f4fab846e610fe84f607f@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 RnJvbTogQW5keSBMdXRvbWlyc2tpDQo+IFNlbnQ6IDA1IEphbnVhcnkgMjAyMSAxNzozNQ0KPiAN Cj4gT24gVHVlLCBKYW4gNSwgMjAyMSBhdCAxOjUzIEFNIERhdmlkIExhaWdodCA8RGF2aWQuTGFp Z2h0QGFjdWxhYi5jb20+IHdyb3RlOg0KPiA+IC4uLg0KLi4uDQo+ID4gPiA+IEkgYWxzbyB3b25k ZXJlZCBhYm91dCByZXNldHRpbmcgaXQgdG8gemVybyB3aGVuIGFuIHgzMiBzeXN0ZW0gY2FsbA0K PiA+ID4gPiBleGl0cyAocmF0aGVyIHRoYW4gZW50cnkgdG8gYSA2NGJpdCBvbmUpLg0KPiA+ID4g Pg0KPiA+ID4gPiBGb3IgaWEzMiB0aGUgZmxhZyBpcyBzZXQgKHdpdGggfD0pIG9uIGV2ZXJ5IHN5 c2NhbGwgZW50cnkuDQo+ID4gPiA+IEV2ZW4gdGhvdWdoIEknbSBwcmV0dHkgc3VyZSBpdCBjYW4g b25seSBjaGFuZ2UgZHVyaW5nIGV4ZWMuDQo+ID4gPg0KPiA+ID4gSXQgY2FuIGNoYW5nZSBmb3Ig ZXZlcnkgc3lzY2FsbC4gSSBoYXZlIHRlc3RzIHRoYXQgZG8gdGhpcy4NCj4gPg0KPiA+IERvIHRo ZXkgc3RpbGwgd29yaz8NCj4gDQo+IFRoZXkgc2VlbSB0by4NCj4gDQo+ID4gSSBkb24ndCB0aGlu ayB0aGUgaWEzMiBmbGFnIGlzIGNsZWFyZWQgYW55d2hlcmUuDQo+IA0KPiBJdCdzIGhpZGluZyBp biBhcmNoX2V4aXRfdG9fdXNlcl9tb2RlX3ByZXBhcmUoKS4NCg0KTm8gd29uZGVyIEkgZG9uJ3Qg bm90aWNlLg0KVGhlcmUgaXMgYSBSTVcgdG8gY2xlYXIgVFNfQ09NUEFUIHwgVFNfSTM4Nl9SRUdT X1BPS0VEIGFzIChhYm91dCkNCnRoZSB2ZXJ5IGxhc3QgdGhpbmcgZG9uZSBiZWZvcmUgcmV0dXJu aW5nIHRvIHVzZXIuDQoNClNob3J0IG9yIHJlbmFtaW5nIHRoZSAnc3RhdHVzJyBmaWVsZCBhbmQg Zml4aW5nIHRoZSBjb21waWxhdGlvbiBlcnJvcnMNCkkgY2FuJ3Qgc2VlIGFuIG9idmlvdXMgd2F5 IG9mIGRldGVjdGluZyBhbnkgb3RoZXIgc3RhdHVzIGZsYWcgYml0cy4NCg0KSWYgbm9uZSBhcmUg dXNlZCAob3IgYSBkaWZmZXJlbnQgZmllbGQgaXMgdXNlZCkgdGhlbiBhbiB1bmNvbmRpdGlvbmFs DQp3cml0ZSBvZiB0aGUgc3lzY2FsbCB0eXBlIGluIHRoZSBlbnRyeSBwYXRocyB3b3VsZCByZW1v dmUgdGhlIG5lZWQgZm9yDQp0aGUgY2xlYXIgaW4gdGhlIHN5c2NhbGwgZXhpdCBwYXRoLg0KDQoJ RGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1v dW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEz OTczODYgKFdhbGVzKQ0K