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 85360C433DB for ; Tue, 2 Feb 2021 09:26:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2793E64EC8 for ; Tue, 2 Feb 2021 09:26:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232910AbhBBJZm (ORCPT ); Tue, 2 Feb 2021 04:25:42 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:45173 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229975AbhBBJZc (ORCPT ); Tue, 2 Feb 2021 04:25:32 -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-138-ZgGVazRuO0urN_jQBu4yZw-1; Tue, 02 Feb 2021 09:23:53 +0000 X-MC-Unique: ZgGVazRuO0urN_jQBu4yZw-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, 2 Feb 2021 09:23:54 +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, 2 Feb 2021 09:23:54 +0000 From: David Laight To: 'Andy Lutomirski' , "Jason A. Donenfeld" CC: Kernel Hardening , LKML , Jann Horn , Christian Brauner Subject: RE: forkat(int pidfd), execveat(int pidfd), other awful things? Thread-Topic: forkat(int pidfd), execveat(int pidfd), other awful things? Thread-Index: AQHW+MjRGTZ+ypDOi0yJVnTMuiyGI6pElfgg Date: Tue, 2 Feb 2021 09:23:54 +0000 Message-ID: References: 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+IFNlbnQ6IDAxIEZlYnJ1YXJ5IDIwMjEgMTg6MzANCi4u Lg0KPiAyLiBBIHNhbmUgcHJvY2VzcyBjcmVhdGlvbiBBUEkuICBJdCB3b3VsZCBiZSBkZWxpZ2h0 ZnVsIHRvIGJlIGFibGUgdG8NCj4gY3JlYXRlIGEgZnVsbHktc3BlY2lmaWVkIHByb2Nlc3Mgd2l0 aG91dCBmb3JraW5nLiAgVGhpcyBtaWdodCBlbmQgdXANCj4gYmVpbmcgYSBmYWlybHkgY29tcGxp Y2F0ZWQgcHJvamVjdCwgdGhvdWdoIC0tIHRoZXJlIGFyZSBhIGxvdCBvZg0KPiBpbmhlcml0ZWQg cHJvY2VzcyBwcm9wZXJ0aWVzIHRvIGJlIGVudW1lcmF0ZWQuDQoNClNpbmNlIHlvdSBhcmUgZ29p bmcgdG8gKGV2ZW50dWFsbHkpIGxvYWQgaW4gYSBwcm9ncmFtIGltYWdlDQpoYXZlIHRvIGRvIHNl dmVyYWwgc3lzdGVtIGNhbGxzIHRvIGNyZWF0ZSB0aGUgcHJvY2VzcyBpc24ndA0KbGlrZWx5IHRv IGJlIGEgcHJvYmxlbS4NClNvIHVzaW5nIHNlcGFyYXRlIGNhbGxzIGZvciBlYWNoIHByb3BlcnR5 IGlzbid0IHJlYWxseSBhbiBpc3N1ZQ0KYW5kIHNvbHZlcyB0aGUgaG9ycmlkIHByb2JsZW0gb2Yg dGhlIEFQSSBzdHJ1Y3R1cmUuDQoNClNvIHlvdSBjb3VsZCBjcmVhdGUgYW4gZW1icnlvbmljIHBy b2Nlc3MgdGhhdCBpbmhlcml0cyBhIGxvdA0Kb2Ygc3R1ZmYgZnJvbSB0aGUgY3VycmVudCBwcm9j ZXNzLCB0aGUgZG8gYWN0aW9ucyB0aGF0DQpzb3J0IG91dCB0aGUgZmRzLCBhcmd2LCBuYW1lc3Bh Y2UgZXRjLg0KRmluYWxseSBydW5uaW5nIHRoZSBuZXcgcHJvZ3JhbS4NCg0KSXQgd291bGQgcHJv YmFibHkgbWFrZSBpbXBsZW1lbnQgcG9zaXhfc3Bhd24oKSBlYXNpZXIuDQoNCglEYXZpZA0KDQot DQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwg TWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2Fs ZXMpDQo=