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=-0.9 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 95C18C04AAC for ; Mon, 6 May 2019 07:01:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6DAFB206A3 for ; Mon, 6 May 2019 07:01:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725948AbfEFHBL (ORCPT ); Mon, 6 May 2019 03:01:11 -0400 Received: from mga02.intel.com ([134.134.136.20]:31788 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725710AbfEFHBK (ORCPT ); Mon, 6 May 2019 03:01:10 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 May 2019 00:01:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,437,1549958400"; d="scan'208";a="140379799" Received: from irsmsx106.ger.corp.intel.com ([163.33.3.31]) by orsmga008.jf.intel.com with ESMTP; 06 May 2019 00:01:05 -0700 Received: from irsmsx102.ger.corp.intel.com ([169.254.2.21]) by IRSMSX106.ger.corp.intel.com ([169.254.8.235]) with mapi id 14.03.0415.000; Mon, 6 May 2019 08:01:05 +0100 From: "Reshetova, Elena" To: David Laight , Ingo Molnar CC: Andy Lutomirski , Theodore Ts'o , "Eric Biggers" , "ebiggers@google.com" , "herbert@gondor.apana.org.au" , Peter Zijlstra , "keescook@chromium.org" , Daniel Borkmann , "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" , "Edgecombe, Rick P" , Linus Torvalds , Peter Zijlstra 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: AQHU81HQwzT9MH4dM0y/JZXnSwiYT6Y8wW2AgAAdM1CAAXexAIAANZ3ggAAW1gCAAApRgIAAMeKAgAAd+PCAAQuGgIAAYQuAgAAKhwCACsPi4IADJTwAgAAcagCAAExngIAEBbGAgACIbACAAbyQ8IAA626AgAGZfXCAAARpgIAAWpuAgAAF74CAABf/AIAAAvkAgAGZnrD///dzgIAEI1ng Date: Mon, 6 May 2019 07:01:04 +0000 Message-ID: <2236FBA76BA1254E88B949DDB74E612BA4C7125F@IRSMSX102.ger.corp.intel.com> References: <57357E35-3D9B-4CA7-BAB9-0BE89E0094D2@amacapital.net> <2236FBA76BA1254E88B949DDB74E612BA4C66A8A@IRSMSX102.ger.corp.intel.com> <6860856C-6A92-4569-9CD8-FF6C5C441F30@amacapital.net> <2236FBA76BA1254E88B949DDB74E612BA4C6A4D7@IRSMSX102.ger.corp.intel.com> <303fc4ee5ac04e4fac104df1188952e8@AcuMS.aculab.com> <2236FBA76BA1254E88B949DDB74E612BA4C6C2C3@IRSMSX102.ger.corp.intel.com> <2e55aeb3b39440c0bebf47f0f9522dd8@AcuMS.aculab.com> <20190502150853.GA16779@gmail.com> <20190502164524.GB115950@gmail.com> <2236FBA76BA1254E88B949DDB74E612BA4C6F523@IRSMSX102.ger.corp.intel.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-version: 11.0.600.7 dlp-reaction: no-action x-ctpclassification: CTP_NT x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiMDkwNzNhZTgtMTVmZi00NmVmLThmNzAtN2VhNjNkZDY3OWViIiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX05UIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE3LjEwLjE4MDQuNDkiLCJUcnVzdGVkTGFiZWxIYXNoIjoiQnVQcFlEbXZGaU9iYUlqU3dUQ2JydWNzS1ZZblZhNVJ5dGtXZTRRU3pzTnZsRHB4dkdyTTI5NjBVeWVmWmhKcyJ9 x-originating-ip: [163.33.239.182] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PiBGcm9tOiBSZXNoZXRvdmEsIEVsZW5hDQo+ID4gU2VudDogMDMgTWF5IDIwMTkgMTc6MTcNCj4g Li4uDQo+ID4gcmRyYW5kIChjYWxsaW5nIGV2ZXJ5IDggc3lzY2FsbHMpOiBTaW1wbGUgc3lzY2Fs bDogMC4wNzk1IG1pY3Jvc2Vjb25kcw0KPiANCj4gWW91IGNvdWxkIHRyeSBzb21ldGhpbmcgbGlr ZToNCj4gCXU2NCByYW5kX3ZhbCA9IGNwdV92YXItPnN5c2NhbGxfcmFuZA0KPiANCj4gCXdoaWxl ICh1bmxpa2VseShyYW5kX3ZhbCA9PSAwKSkNCj4gCQlyYW5kX3ZhbCA9IHJkcmFuZDY0KCk7DQo+ IA0KPiAJc3RhY2tfb2Zmc2V0ID0gcmFuZF92YWwgJiAweGZmOw0KPiAJcmFuZF92YWwgPj49IDY7 DQo+IAlpZiAobGlrZWx5KHJhbmRfdmFsID49IDQpKQ0KPiAJCWNwdV92YXItPnN5c2NhbGxfcmFu ZCA9IHJhbmRfdmFsOw0KPiAJZWxzZQ0KPiAJCWNwdV92YXItPnN5c2NhbGxfcmFuZCA9IHJkcmFu ZDY0KCk7DQo+IA0KPiAJcmV0dXJuIHN0YWNrX29mZnNldDsNCj4gDQo+IFRoYXQgZ2l2ZXMgeW91 IDEwIHN5c3RlbSBjYWxscyBwZXIgcmRyYW5kIGluc3RydWN0aW9uDQo+IGFuZCBtb3N0bHkgdGFr ZXMgdGhlIGxhdGVuY3kgb3V0IG9mIGxpbmUuDQoNCkkgYW0gbm90IHJlYWxseSBoYXBweSBnb2lu ZyB0aGUgcmRyYW5kIHBhdGggZm9yIGEgY291cGxlIG9mIHJlYXNvbnM6DQotIGl0IGlzIG5vdCBh dmFpbGFibGUgb24gb2xkZXIgUENzDQotIGl0cyBwZXJmb3JtYW5jZSB2YXJpZXMgYWNyb3NzIENQ VXMgdGhhdCBzdXBwb3J0IGl0IChhbmQgYXMgSSB1bmRlcnN0b29kIHZhcmllcyBxdWl0ZSBzb21l KQ0KLSBpdCBpcyB4ODYgY2VudHJpYyBhbmQgbm90IGdlbmVyaWMNCg0KU28sIGlmIHdlIGNhbiB1 c2UgZ2V0X3JhbmRvbV9ieXRlcygpIGludGVyZmFjZSB3aXRob3V0IHRpZ2h0ZW5pbmcgb3Vyc2Vs dmVzIHRvDQphIHBhcnRpY3VsYXIgaW5zdHJ1Y3Rpb24sIEkgdGhpbmsgaXQgd291bGQgYmUgYmV0 dGVyLiANClRoZSBudW1iZXJzIEkgaGF2ZSBtZWFzdXJlZCBzbyBmYXIgZm9yIGJ1ZmZlciBzaXpl IG9mIDQwOTYgaXMgU1cgb25seSwgDQpJIHdpbGwgdHJ5IHRvIG1lYXN1cmUgdG9kYXkgd2hhdCBi b29zdCAoaWYgYW55KSB3ZSBjYW4gaGF2ZSBpZiB3ZSB1c2UgU0lNRCANCmNvZGUgZm9yIGl0LiAN Cg0KQmVzdCBSZWdhcmRzLA0KRWxlbmEuDQo=