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 BF9B8C433E0 for ; Tue, 5 Jan 2021 09:55:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6E32120739 for ; Tue, 5 Jan 2021 09:55:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728070AbhAEJyr (ORCPT ); Tue, 5 Jan 2021 04:54:47 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:45686 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727768AbhAEJyr (ORCPT ); Tue, 5 Jan 2021 04:54:47 -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-16-zJTXlFpDMN-KCXMpc2E7rQ-1; Tue, 05 Jan 2021 09:53:07 +0000 X-MC-Unique: zJTXlFpDMN-KCXMpc2E7rQ-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, 5 Jan 2021 09:53:06 +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, 5 Jan 2021 09:53:06 +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/OqoYCInQgAANioCAALOoMA== Date: Tue, 5 Jan 2021 09:53:06 +0000 Message-ID: <9108ae60809f4fab846e610fe84f607f@AcuMS.aculab.com> References: <091174F9-F6E4-468E-83F5-93706D83F9D2@amacapital.net> In-Reply-To: <091174F9-F6E4-468E-83F5-93706D83F9D2@amacapital.net> 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+IFNlbnQ6IDA0IEphbnVhcnkgMjAyMSAyMzowNA0KLi4u DQo+ID4+IFRoZSB4MzIgc3lzdGVtIGNhbGxzIGhhdmUgdGhlaXIgb3duIHN5c3RlbSBjYWxsIHRh YmxlIGFuZCBpdCB3b3VsZCBiZQ0KPiA+PiB0cml2aWFsIHRvIHNldCBhIGZsYWcgbGlrZSBUU19D T01QQVQgd2hlbiBsb29raW5nIHVwIGEgc3lzdGVtIGNhbGwgZnJvbQ0KPiA+PiB0aGF0IHRhYmxl LiAgSSBleHBlY3Qgc3VjaCBhIGNoYW5nZSB3b3VsZCBiZSBwdXJlbHkgaW4gdGhlIG5vaXNlLg0K PiA+DQo+ID4gQ2VydGFpbmx5IGEgd3JpdGUgb2YgMC8xLzIgaW50byBhIGRpcnRpZWQgY2FjaGUg bGluZSBvZiAnY3VycmVudCcNCj4gPiBjb3VsZCBlYXNpbHkgY29zdCBhYnNvbHV0ZWx5IG5vdGhp bmcuDQo+ID4gRXNwZWNpYWxseSBpZiBjdXJyZW50IGhhcyBhbHJlYWR5IGJlZW4gcmVhZC4NCj4g Pg0KPiA+IEkgYWxzbyB3b25kZXJlZCBhYm91dCByZXNldHRpbmcgaXQgdG8gemVybyB3aGVuIGFu IHgzMiBzeXN0ZW0gY2FsbA0KPiA+IGV4aXRzIChyYXRoZXIgdGhhbiBlbnRyeSB0byBhIDY0Yml0 IG9uZSkuDQo+ID4NCj4gPiBGb3IgaWEzMiB0aGUgZmxhZyBpcyBzZXQgKHdpdGggfD0pIG9uIGV2 ZXJ5IHN5c2NhbGwgZW50cnkuDQo+ID4gRXZlbiB0aG91Z2ggSSdtIHByZXR0eSBzdXJlIGl0IGNh biBvbmx5IGNoYW5nZSBkdXJpbmcgZXhlYy4NCj4gDQo+IEl0IGNhbiBjaGFuZ2UgZm9yIGV2ZXJ5 IHN5c2NhbGwuIEkgaGF2ZSB0ZXN0cyB0aGF0IGRvIHRoaXMuDQoNCkRvIHRoZXkgc3RpbGwgd29y az8NCkkgZG9uJ3QgdGhpbmsgdGhlIGlhMzIgZmxhZyBpcyBjbGVhcmVkIGFueXdoZXJlLg0KDQpT byBhIDY0Yml0IHdyaXRldigpIG1pZ2h0IHRvIGJhZGx5IHdyb25nIGFmdGVyIGFuIGlhMzIgc3lz Y2FsbC4NCg0KVGhlIHgzMiBmbGFnIGlzIGRpZmZlcmVudCwgdGhlIHN5c2NhbGxzIGp1c3QgaGF2 ZSBkaWZmZXJlbnQgbnVtYmVycy4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBM YWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBU LCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==