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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 25F08C10F11 for ; Wed, 24 Apr 2019 13:32:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F23A621773 for ; Wed, 24 Apr 2019 13:32:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728696AbfDXNb7 (ORCPT ); Wed, 24 Apr 2019 09:31:59 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:39541 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726904AbfDXNb7 (ORCPT ); Wed, 24 Apr 2019 09:31:59 -0400 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-_Wh5CtMQPvaSf2MjPGY3wA-1; Wed, 24 Apr 2019 14:31:55 +0100 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b::d117) by AcuMS.aculab.com (fd9f:af1c:a25b::d117) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Wed, 24 Apr 2019 14:33:08 +0100 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, 24 Apr 2019 14:33:08 +0100 From: David Laight To: "'Reshetova, Elena'" , 'Theodore Ts'o' , Ingo Molnar , 'Peter Zijlstra' , "keescook@chromium.org" CC: Daniel Borkmann , "luto@kernel.org" , "luto@amacapital.net" , "linux-kernel@vger.kernel.org" , "jpoimboe@redhat.com" , "jannh@google.com" , "Perla, Enrico" , "mingo@redhat.com" , "bp@alien8.de" , "tglx@linutronix.de" , "gregkh@linuxfoundation.org" Subject: RE: [PATCH] x86/entry/64: randomize kernel stack offset upon syscall Thread-Topic: [PATCH] x86/entry/64: randomize kernel stack offset upon syscall Thread-Index: AQHU9E1UquBTkhVACE2y3BuRFoekIqY8wW2AgAAdM1CAAXexAIAANZ3ggAAW1gCAAApRgIAAMeKAgAAd+PCAARJkYIAAWDaAgAAZlPCACqsuAIAALsDQ Date: Wed, 24 Apr 2019 13:33:08 +0000 Message-ID: References: <20190415060918.3766-1-elena.reshetova@intel.com> <20190415072535.GA51449@gmail.com> <2236FBA76BA1254E88B949DDB74E612BA4C4F90F@IRSMSX102.ger.corp.intel.com> <20190416073444.GC127769@gmail.com> <2236FBA76BA1254E88B949DDB74E612BA4C51962@IRSMSX102.ger.corp.intel.com> <20190416120822.GV11158@hirez.programming.kicks-ass.net> <01914abbfc1a4053897d8d87a63e3411@AcuMS.aculab.com> <20190416154348.GB3004@mit.edu> <2236FBA76BA1254E88B949DDB74E612BA4C52338@IRSMSX102.ger.corp.intel.com> <9cf586757eb44f2c8f167abf078da921@AcuMS.aculab.com> <20190417151555.GG4686@mit.edu> <99e045427125403ba2b90c2707d74e02@AcuMS.aculab.com> <2236FBA76BA1254E88B949DDB74E612BA4C5E473@IRSMSX102.ger.corp.intel.com> In-Reply-To: <2236FBA76BA1254E88B949DDB74E612BA4C5E473@IRSMSX102.ger.corp.intel.com> Accept-Language: en-GB, en-US Content-Language: 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 X-MC-Unique: _Wh5CtMQPvaSf2MjPGY3wA-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogUmVzaGV0b3ZhLCBFbGVuYQ0KPiBTZW50OiAyNCBBcHJpbCAyMDE5IDEyOjQzDQo+DQo+ IFNvcnJ5IGZvciB0aGUgZGVsYXkgLSBFYXN0ZXIgaG9saWRheXMgKyBJIHdhcyB0cnlpbmcgdG8g YXJyYW5nZSBteSBicmFpbiBhcm91bmQgcHJvcG9zZWQgb3B0aW9ucy4NCj4gSGVyZSB3aGF0IEkg dGhpbmsgb3VyIG9wdGlvbnMgYXJlIHdpdGggcmVnYXJkcyB0byB0aGUgc291cmNlIG9mIHJhbmRv bW5lc3M6DQo+IA0KPiAxKSByZHRzYyBvciB2YXJpYXRpb25zIGJhc2VkIG9uIGl0IChEYXZpZCBw cm9wb3NlZCBzb21lIENSQy1iYXNlZCB2YXJpYW50cyBmb3IgZXhhbXBsZSkNCg0KRG8gSSByZW1l bWJlciBzb21ldGhpbmcgYWJvdXQgcmR0c2MgYmVpbmcgbWFkZSBsZXNzIGFjY3VyYXRlIGluIG9y ZGVyIHRvDQptYWtlIGl0IChzbGlnaHRseSkgbW9yZSBkaWZmaWN1bHQgdG8gdXNlIGl0IHRvIG1l YXN1cmUgdGltaW5nIGF0dGFja3M/DQoNCklmIHRydWUsIGFuZCBpdCBhcHBsaWVzIHRvIHRoZSBr ZXJuZWwgKGVnIGluIGEgVk0pIHRoZW4gdGhpcyBpcyBwcm9iYWJseQ0KYWxsIHBvaW50bGVzcyEN Cg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2Fk LCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5v OiAxMzk3Mzg2IChXYWxlcykNCg==