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[209.132.180.67]) by mx.google.com with ESMTP id a3si11400196pgm.455.2019.04.26.10.38.46; Fri, 26 Apr 2019 10:39:01 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726317AbfDZRhs (ORCPT + 99 others); Fri, 26 Apr 2019 13:37:48 -0400 Received: from mga02.intel.com ([134.134.136.20]:42687 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726053AbfDZRhs (ORCPT ); Fri, 26 Apr 2019 13:37:48 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Apr 2019 10:37:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,398,1549958400"; d="scan'208";a="165207168" Received: from orsmsx103.amr.corp.intel.com ([10.22.225.130]) by fmsmga002.fm.intel.com with ESMTP; 26 Apr 2019 10:37:35 -0700 Received: from orsmsx112.amr.corp.intel.com ([169.254.3.109]) by ORSMSX103.amr.corp.intel.com ([169.254.5.76]) with mapi id 14.03.0415.000; Fri, 26 Apr 2019 10:37:34 -0700 From: "Edgecombe, Rick P" To: "ebiggers@google.com" , "mingo@kernel.org" , "peterz@infradead.org" , "keescook@chromium.org" , "Reshetova, Elena" , "ebiggers3@gmail.com" , "David.Laight@ACULAB.COM" , "tytso@mit.edu" , "herbert@gondor.apana.org.au" CC: "linux-kernel@vger.kernel.org" , "daniel@iogearbox.net" , "jannh@google.com" , "tglx@linutronix.de" , "jpoimboe@redhat.com" , "mingo@redhat.com" , "luto@kernel.org" , "bp@alien8.de" , "gregkh@linuxfoundation.org" , "luto@amacapital.net" , "Perla, Enrico" 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+PCAAQuGgIAAYQuAgAAKhwCACsPi4IADJTwAgADe7YA= Date: Fri, 26 Apr 2019 17:37:34 +0000 Message-ID: <56e694bfbe2993389a9662b1477b74eaaca3c171.camel@intel.com> 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> <2236FBA76BA1254E88B949DDB74E612BA4C63E24@IRSMSX102.ger.corp.intel.com> In-Reply-To: <2236FBA76BA1254E88B949DDB74E612BA4C63E24@IRSMSX102.ger.corp.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.54.75.11] Content-Type: text/plain; charset="utf-8" Content-ID: <4B107D6D6F5339418448E2194AF9B946@intel.com> 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 T24gRnJpLCAyMDE5LTA0LTI2IGF0IDEyOjMzICswMTAwLCBSZXNoZXRvdmEsIEVsZW5hIHdyb3Rl Og0KPiAxKSByZHRzYyBvciB2YXJpYXRpb25zIGJhc2VkIG9uIGl0IChEYXZpZCBwcm9wb3NlZCBz b21lIENSQy1iYXNlZCB2YXJpYW50cyBmb3INCj4gPiBleGFtcGxlKQ0KSGksDQoNCkNvdWxkIHdl IHJlcGVhdGVkbHkgbWVhc3VyZSB0aGUgdGltZSBmb3IgYSBzaG9ydCBzeXNjYWxsIG9uIGEgcXVp ZXQgc3lzdGVtIGFuZA0KZXN0aW1hdGUgdGhlIGVudHJvcHkgd2UgZ2V0IGZyb20gdGhpcz8gSW4g c29tZSBzY2VuYXJpb3MgdGhlIGF0dGFja2VyIG1pZ2h0IGhhdmUNCmxlc3MgY29udHJvbCBvZiB0 aGUgdGltaW5nIGFzIHdlbGwuDQoNClNpbmNlIHRoaXMgaXMgYSBzdGF0aXN0aWNhbCBkZWZlbnNl LCBhc3N1bWluZyB0aGUgYXJndW1lbnQgY2FuIGJlIG1hZGUgdGhhdA0KdGhlcmUgaXMgYXQgbGVh c3Qgc29tZSByYW5kb21uZXNzIGluIHRoZSB0aW1lciwgYW5kIGNvdWxkIGF0IGxlYXN0IGJlIG91 dCBvZiB0aGUNCmNvbnRyb2wgb2YgYW4gYXR0YWNrZXIgc29tZXRpbWVzLCBJIHdvbmRlciBpZiB0 aGlzIGZlYXR1cmUgY291bGQgYmUgdmFsdWFibGUNCmJlZm9yZSB0aGUgc2VhcmNoIGZvciBhIGZh c3RlciBzdHJvbmdlciByYW5kb20gbnVtYmVyIGdlbmVyYXRvciBjb21wbGV0ZXMuDQoNCkNvdWxk IHRoYXQgYmUgYSB3YXkgZm9yd2FyZCBmb3Igbm93Pw0KDQpUaGFua3MsDQoNClJpY2sNCg==