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=unavailable 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 EB382C282CC for ; Wed, 6 Feb 2019 11:48:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B808820B1F for ; Wed, 6 Feb 2019 11:48:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729467AbfBFLsH (ORCPT ); Wed, 6 Feb 2019 06:48:07 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:37790 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726750AbfBFLsH (ORCPT ); Wed, 6 Feb 2019 06:48:07 -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-54-sUogVLojMLCk6jX27cd6tg-1; Wed, 06 Feb 2019 11:48:02 +0000 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; Wed, 6 Feb 2019 11:48:44 +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; Wed, 6 Feb 2019 11:48:44 +0000 From: David Laight To: 'Mathieu Desnoyers' , Kees Cook CC: William Cohen , "stable@vger.kernel.org" , Laura Abbott , Masami Hiramatsu , Russell King , linux-kernel , "lttng@reliableembeddedsystems.com" , lttng-dev Subject: RE: optimized kprobes illegal instructions in v4.19 stable kernels Thread-Topic: optimized kprobes illegal instructions in v4.19 stable kernels Thread-Index: AdS+EenMuTZKVrnAShWmIxd2cEb4Sw== Date: Wed, 6 Feb 2019 11:48:44 +0000 Message-ID: <76948cf5011e454494107cea61c6930c@AcuMS.aculab.com> References: <342740659.2887.1549307721609.JavaMail.zimbra@efficios.com> In-Reply-To: <342740659.2887.1549307721609.JavaMail.zimbra@efficios.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: sUogVLojMLCk6jX27cd6tg-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 RnJvbTogTWF0aGlldSBEZXNub3llcnMNCj4gU2VudDogMDQgRmVicnVhcnkgMjAxOSAxOToxNQ0K PiBJIG5vdGljZSB0aGlzIGNvbW1pdCBhcyBhIHBvc3NpYmxlIGN1bHByaXQgb2YgdGhlIGlsbGVn YWwgaW5zdHJ1Y3Rpb25zIG15IGx0dG5nDQo+IHVzZXJzIGFyZSBub3RpY2luZyBvbiBhcm0zMiB3 aGVuIHVzaW5nIGtwcm9iZXMgb24gYSB2NC4xOS4xMyBMaW51eCBrZXJuZWwNCj4gaW4gYSBZb2N0 byBlbnZpcm9ubWVudCBbMV0uIFRoZXkgd2VyZSBhYmxlIHRvIHJlcHJvZHVjZSB0aGUgaXNzdWUg d2l0aCBwZXJmDQo+IGFzIHdlbGwuDQo+IA0KPiBjb21taXQgZTQ2ZGFlZTUzYmI1MGJkZTM4ODA1 ZjE4MjNhMTgyOTc5NzI0YzIyOQ0KPiBBdXRob3I6IEtlZXMgQ29vayA8a2Vlc2Nvb2tAY2hyb21p dW0ub3JnPg0KPiBEYXRlOiAgIFR1ZSBPY3QgMzAgMjI6MTI6NTYgMjAxOCArMDEwMA0KPiANCj4g ICAgIEFSTTogODgwNi8xOiBrcHJvYmVzOiBGaXggZmFsc2UgcG9zaXRpdmUgd2l0aCBGT1JUSUZZ X1NPVVJDRQ0KPiANCj4gSSAqdGhpbmsqIHRoZSBpbnRlbnQgdGhlcmUgd2FzIHRvIGRvDQo+IA0K PiAtICAgICAgIG1lbWNweShjb2RlLCAmb3B0cHJvYmVfdGVtcGxhdGVfZW50cnksDQo+ICsgICAg ICAgbWVtY3B5KGNvZGUsICh1bnNpZ25lZCBsb25nICopJm9wdHByb2JlX3RlbXBsYXRlX2VudHJ5 LA0KPiANCj4gQnV0IGlmIHlvdSBsb29rIGF0IHRoZSBjb21taXQsIHRoZSAiJiIgc2VlbXMgdG8g aGF2ZSBiZWVuIHN0cmlwcGVkIGF3YXksDQo+IHdoaWNoIGhhcHBlbnMgdG8gY2hhbmdlIHRoZSBi ZWhhdmlvciBzaWduaWZpY2FudGx5Lg0KDQpXaGljaCBpcyB3aHkgeW91IHNob3VsZG4ndCBhZGQg Y2FzdHMgdG8gc2h1dCB1cCBjb21waWxlciB3YXJuaW5ncyAuLi4uDQoNCglEYXZpZA0KDQotDQpS ZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWls dG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMp DQo=