From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-f200.google.com (mail-pf1-f200.google.com [209.85.210.200]) by kanga.kvack.org (Postfix) with ESMTP id B5F2F8E0001 for ; Mon, 24 Sep 2018 14:58:44 -0400 (EDT) Received: by mail-pf1-f200.google.com with SMTP id d22-v6so10635041pfn.3 for ; Mon, 24 Sep 2018 11:58:44 -0700 (PDT) Received: from mga11.intel.com (mga11.intel.com. [192.55.52.93]) by mx.google.com with ESMTPS id b4-v6si121913pla.46.2018.09.24.11.58.43 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 24 Sep 2018 11:58:43 -0700 (PDT) From: "Edgecombe, Rick P" Subject: Re: [PATCH v6 2/4] x86/modules: Increase randomization for modules Date: Mon, 24 Sep 2018 18:57:35 +0000 Message-ID: <1537815484.19013.48.camel@intel.com> References: <1536874298-23492-1-git-send-email-rick.p.edgecombe@intel.com> <1536874298-23492-3-git-send-email-rick.p.edgecombe@intel.com> In-Reply-To: Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-ID: <7C7B10887068584C86F3A3ACD6F60B7C@intel.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: "keescook@chromium.org" Cc: "linux-kernel@vger.kernel.org" , "daniel@iogearbox.net" , "jannh@google.com" , "arjan@linux.intel.com" , "tglx@linutronix.de" , "linux-mm@kvack.org" , "x86@kernel.org" , "kristen@linux.intel.com" , "hpa@zytor.com" , "mingo@redhat.com" , "alexei.starovoitov@gmail.com" , "kernel-hardening@lists.openwall.com" , "Hansen, Dave" T24gRnJpLCAyMDE4LTA5LTIxIGF0IDEyOjA1IC0wNzAwLCBLZWVzIENvb2sgd3JvdGU6DQo+IE9u IFRodSwgU2VwIDEzLCAyMDE4IGF0IDI6MzEgUE0sIFJpY2sgRWRnZWNvbWJlDQo+IDxyaWNrLnAu ZWRnZWNvbWJlQGludGVsLmNvbT4gd3JvdGU6DQo+IEkgd291bGQgZmluZCB0aGlzIG11Y2ggbW9y ZSByZWFkYWJsZSBhczoNCj4gc3RhdGljIHVuc2lnbmVkIGxvbmcgZ2V0X21vZHVsZV92bWFsbG9j X3N0YXJ0KHZvaWQpDQo+IHsNCj4gwqDCoMKgwqDCoMKgwqB1bnNpZ25lZCBsb25nIGFkZHIgPSBN T0RVTEVTX1ZBRERSOw0KPiANCj4gwqDCoMKgwqDCoMKgwqBpZiAoa2FzbHJfcmFuZG9taXplX2Jh c2UoKSkNCj4gwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoGFkZHIgKz0gZ2V0X21vZHVsZV9s b2FkX29mZnNldCgpOw0KPiANCj4gwqDCoMKgwqDCoMKgwqBpZiAoa2FzbHJfcmFuZG9taXplX2Vh Y2hfbW9kdWxlKCkpDQo+IMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoGFkZHIgKz0gZ2V0 X21vZHVsZXNfcmFuZF9sZW4oKTsNCj4gDQo+IMKgwqDCoMKgwqDCoMKgcmV0dXJuIGFkZHI7DQo+ IH0NClRoYW5rcywgdGhhdCBsb29rcyBiZXR0ZXIuDQoNCj4gDQo+ID4gwqB2b2lkICptb2R1bGVf YWxsb2ModW5zaWduZWQgbG9uZyBzaXplKQ0KPiA+IMKgew0KPiA+IEBAIC04NCwxNiArMjAxLDE4 IEBAIHZvaWQgKm1vZHVsZV9hbGxvYyh1bnNpZ25lZCBsb25nIHNpemUpDQo+ID4gwqDCoMKgwqDC oMKgwqDCoGlmIChQQUdFX0FMSUdOKHNpemUpID4gTU9EVUxFU19MRU4pDQo+ID4gwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqByZXR1cm4gTlVMTDsNCj4gPiANCj4gPiAtwqDCoMKgwqDC oMKgwqBwID0gX192bWFsbG9jX25vZGVfcmFuZ2Uoc2l6ZSwgTU9EVUxFX0FMSUdOLA0KPiA+IC3C oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgTU9EVUxFU19WQUREUiArDQo+ID4gZ2V0X21vZHVsZV9sb2FkX29mZnNldCgp LA0KPiA+IC3CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgTU9EVUxFU19FTkQsIEdGUF9LRVJORUwsDQo+ID4gLcKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqBQQUdFX0tFUk5FTF9FWEVDLCAwLCBOVU1BX05PX05PREUsDQo+ID4gLcKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqBfX2J1aWx0aW5fcmV0dXJuX2FkZHJlc3MoMCkpOw0KPiA+ICvCoMKgwqDCoMKgwqDCoHAg PSB0cnlfbW9kdWxlX3JhbmRvbWl6ZV9lYWNoKHNpemUpOw0KPiA+ICsNCj4gPiArwqDCoMKgwqDC oMKgwqBpZiAoIXApDQo+ID4gK8KgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoHAgPSBfX3Zt YWxsb2Nfbm9kZV9yYW5nZShzaXplLCBNT0RVTEVfQUxJR04sDQo+ID4gK8KgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgZ2V0X21vZHVs ZV92bWFsbG9jX3N0YXJ0KCksIE1PRFVMRVNfRU5ELA0KPiA+ICvCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoEdGUF9LRVJORUwsIFBB R0VfS0VSTkVMX0VYRUMsIDAsDQo+ID4gK8KgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgTlVNQV9OT19OT0RFLCBfX2J1aWx0aW5fcmV0 dXJuX2FkZHJlc3MoMCkpOw0KPiBJbnN0ZWFkIG9mIGhhdmluZyB0d28gb3Blbi1jb2RlZCBfX3Zt YWxsb2Nfbm9kZV9yYW5nZSgpIGNhbGxzIGxlZnQgaW4NCj4gdGhpcyBhZnRlciB0aGUgY2hhbmdl LCBjYW4gdGhpcyBiZSBkb25lIGluIHRlcm1zIG9mIGEgY2FsbCB0bw0KPiB0cnlfbW9kdWxlX2Fs bG9jKCkgaW5zdGVhZD8gSSBzZWUgdGhleSdyZSBzbGlnaHRseSBkaWZmZXJlbnQsIGJ1dCBpdA0K PiBtaWdodCBiZSBuaWNlIGZvciBtYWtpbmcgdGhlIHR3byBwYXRocyBzaGFyZSBtb3JlIGNvZGUu DQpOb3Qgc3VyZSB3aGF0IHlvdSBtZWFuLiBBY3Jvc3MgdGhlIHdob2xlIGNoYW5nZSwgdGhlcmUg aXMgb25lIGNhbGwNCnRvwqBfX3ZtYWxsb2Nfbm9kZV9yYW5nZSwgYW5kIG9uZSB0b8KgX192bWFs bG9jX25vZGVfdHJ5X2FkZHIu