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 25F69C4361A for ; Fri, 4 Dec 2020 13:35:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E4CF122AAD for ; Fri, 4 Dec 2020 13:35:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729164AbgLDNf2 (ORCPT ); Fri, 4 Dec 2020 08:35:28 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:21762 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728781AbgLDNf1 (ORCPT ); Fri, 4 Dec 2020 08:35:27 -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-112-IjqBB8ewNq6TE9Oy5nRVtQ-1; Fri, 04 Dec 2020 13:33:48 +0000 X-MC-Unique: IjqBB8ewNq6TE9Oy5nRVtQ-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; Fri, 4 Dec 2020 13:33:47 +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; Fri, 4 Dec 2020 13:33:47 +0000 From: David Laight To: 'Topi Miettinen' , 'Mike Rapoport' CC: "linux-hardening@vger.kernel.org" , "akpm@linux-foundation.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andy Lutomirski , Jann Horn , Kees Cook , Linux API , Matthew Wilcox Subject: RE: [PATCH] mm/vmalloc: randomize vmalloc() allocations Thread-Topic: [PATCH] mm/vmalloc: randomize vmalloc() allocations Thread-Index: AQHWyUIaOaq71c1O10ObeOeJDE6bhanmALEggADFggCAACeloA== Date: Fri, 4 Dec 2020 13:33:47 +0000 Message-ID: References: <20201201214547.9721-1-toiwoton@gmail.com> <9d34fb0a-7aba-1e84-6426-006ea7c3d9f5@gmail.com> <20201203065801.GH751215@kernel.org> <2a672ff3df0c47538ed7d1974c864f0b@AcuMS.aculab.com> <3d20f41c-6c8e-755b-33b4-964b5cc5ac71@gmail.com> In-Reply-To: <3d20f41c-6c8e-755b-33b4-964b5cc5ac71@gmail.com> 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 RnJvbTogVG9waSBNaWV0dGluZW4NCj4gU2VudDogMDQgRGVjZW1iZXIgMjAyMCAxMDo1OA0KPiAN Cj4gT24gNC4xMi4yMDIwIDEuMTUsIERhdmlkIExhaWdodCB3cm90ZToNCj4gPiBGcm9tOiBNaWtl IFJhcG9wb3J0DQo+ID4+IFNlbnQ6IDAzIERlY2VtYmVyIDIwMjAgMDY6NTgNCj4gPj4NCj4gPj4g T24gV2VkLCBEZWMgMDIsIDIwMjAgYXQgMDg6NDk6MDZQTSArMDIwMCwgVG9waSBNaWV0dGluZW4g d3JvdGU6DQo+ID4+PiBPbiAxLjEyLjIwMjAgMjMuNDUsIFRvcGkgTWlldHRpbmVuIHdyb3RlOg0K PiA+Pj4+IE1lbW9yeSBtYXBwaW5ncyBpbnNpZGUga2VybmVsIGFsbG9jYXRlZCB3aXRoIHZtYWxs b2MoKSBhcmUgaW4NCj4gPj4+PiBwcmVkaWN0YWJsZSBvcmRlciBhbmQgcGFja2VkIHRpZ2h0bHkg dG93YXJkIHRoZSBsb3cgYWRkcmVzc2VzLiBXaXRoDQo+ID4+Pj4gbmV3IGtlcm5lbCBib290IHBh cmFtZXRlciAncmFuZG9taXplX3ZtYWxsb2M9MScsIHRoZSBlbnRpcmUgYXJlYSBpcw0KPiA+Pj4+ IHVzZWQgcmFuZG9tbHkgdG8gbWFrZSB0aGUgYWxsb2NhdGlvbnMgbGVzcyBwcmVkaWN0YWJsZSBh bmQgaGFyZGVyIHRvDQo+ID4+Pj4gZ3Vlc3MgZm9yIGF0dGFja2Vycy4NCj4gPg0KPiA+IElzbid0 IHRoYXQgZ29pbmcgdG8gaG9ycmlibHkgZnJhZ21lbnQgdGhlIGF2YWlsYWJsZSBhZGRyZXNzIHNw YWNlDQo+ID4gYW5kIG1ha2UgZXZlbiBtb2RlcmF0ZSBzaXplZCBhbGxvY2F0aW9uIHJlcXVlc3Rz IGZhaWwgKG9yIHNsZWVwKS4NCj4gDQo+IEZvciAzMiBiaXQgYXJjaGl0ZWN0dXJlIHRoaXMgaXMg YSByZWFsIGlzc3VlLCBidXQgSSBkb24ndCB0aGluayBmb3IgNjQNCj4gYml0cyBpdCB3aWxsIGJl IGEgcHJvYmxlbS4gWW91IGNhbid0IGZyYWdtZW50IHRoZSB2aXJ0dWFsIG1lbW9yeSBzcGFjZQ0K PiBmb3Igc21hbGwgYWxsb2NhdGlvbnMgYmVjYXVzZSB0aGUgcmVzdWx0aW5nIHBhZ2UgdGFibGVz IHdpbGwgbm90IGZpdCBpbg0KPiBSQU0gZm9yIGV4aXN0aW5nIG9yIG5lYXIgZnV0dXJlIHN5c3Rl bXMuDQoNCkhtbW0gdHJ1bHkgcmFuZG9tIGFsbG9jYXRpb25zIGFyZSBnb2luZyB0byBuZWVkIDMg b3IgNCBleHRyYSBwYWdlIHRhYmxlcw0Kb24gNjRiaXQgc3lzdGVtcy4gQSBiaXQgb3ZlcmhlYWQg Zm9yIDRrIGFsbG9jYXRlcy4NCldoaWxlIHlvdSB3b24ndCBydW4gb3V0IG9mIGFkZHJlc3Mgc3Bh Y2UsIHlvdSB3aWxsIHJ1biBvdXQgb2YgbWVtb3J5Lg0KDQpSYW5kb21pc2luZyB0aGUgYWxsb2Nh dGVkIGFkZHJlc3Mgd2l0aCB0aGUgYXJlYSB0aGF0IGFscmVhZHkNCmhhcyBwYWdlIHRhYmxlcyBh bGxvY2F0ZWQgbWlnaHQgbWFrZSBhIGJpdCBvZiBzZW5zZS4NClRoZW4gYWxsb2NhdGUgc2ltaWxh cihpc2gpIHNpemVkIGl0ZW1zIGZyb20gdGhlIHNhbWUgJ2xhcmdlJyBwYWdlcy4NCg0KSSB3YXMg d29uZGVyaW5nIGlmIGEgZmxhZyBpbmRpY2F0aW5nIHdoZXRoZXIgYW4gYWxsb2NhdGUgd2FzICds b25nIHRlcm0nDQpvciAnc2hvcnQgdGVybScgbWlnaHQgaGVscCB0aGUgcGxhY2VtZW50Lg0KU2hv cnQgdGVybSBzbWFsbCBpdGVtcyBjb3VsZCBiZSB1c2VkIHRvIGZpbGwgdGhlIHNwYWNlIGluICds YXJnZSBwYWdlcycgbGVmdA0KYnkgbm9uLWFsaWduZWQgbGVuZ3RoIGxhcmdlIGl0ZW1zLg0KDQpU cm91YmxlIGlzIHlvdSBuZWVkIGEgQ0JVIChDcnlzdGFsIEJhbGwgVW5pdCkgdG8gZ2V0IGl0IHJp Z2h0Lg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5 IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRp b24gTm86IDEzOTczODYgKFdhbGVzKQ0K