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=-0.8 required=3.0 tests=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 075E8C3A5A4 for ; Fri, 30 Aug 2019 09:56:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D5D162186A for ; Fri, 30 Aug 2019 09:56:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727603AbfH3J4n (ORCPT ); Fri, 30 Aug 2019 05:56:43 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:53541 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726653AbfH3J4m (ORCPT ); Fri, 30 Aug 2019 05:56:42 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-130-P6GY7liWP8u9PLRWlkmegQ-1; Fri, 30 Aug 2019 10:56:39 +0100 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, 30 Aug 2019 10:56:39 +0100 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, 30 Aug 2019 10:56:39 +0100 From: David Laight To: 'Linus Torvalds' , Ingo Molnar CC: Tetsuo Handa , Arnd Bergmann , Greg Kroah-Hartman , "Linux List Kernel Mailing" , syzbot Subject: RE: [PATCH] /dev/mem: Bail out upon SIGKILL when reading memory. Thread-Topic: [PATCH] /dev/mem: Bail out upon SIGKILL when reading memory. Thread-Index: AQHVV6Op4hc1jesckEO2Njx8G6LSv6cHrBeAgAC6ywCAAHvDAIABi1YAgAAYGYCAAC0oAIAACaQAgAi0npA= Date: Fri, 30 Aug 2019 09:56:38 +0000 Message-ID: <0eb1d644d233432b8e62d87bd470d7d5@AcuMS.aculab.com> References: <1566338811-4464-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp> <20190823091636.GA10064@gmail.com> <20190824161432.GA25950@gmail.com> <20190824202224.GA5286@gmail.com> In-Reply-To: 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: P6GY7liWP8u9PLRWlkmegQ-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 RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMjQgQXVndXN0IDIwMTkgMjE6NTcNCj4gT24g U2F0LCBBdWcgMjQsIDIwMTkgYXQgMToyMiBQTSBJbmdvIE1vbG5hciA8bWluZ29Aa2VybmVsLm9y Zz4gd3JvdGU6DQo+ID4NCj4gPiBUaGF0IG1ha2VzIHNlbnNlOiBJIG1lYXN1cmVkIDE3IHNlY29u ZHMgcGVyIDEwMCBNQiBvZiBkYXRhLCB3aGljaCBpcyBpcw0KPiA+IDAuMTYgdXNlY3MgcGVyIGJ5 dGUuIFRoZSBpbnN0cnVjdGlvbiB1c2VkIGJ5DQo+ID4gY29weV91c2VyX2VuaGFuY2VkX2Zhc3Rf c3RyaW5nKCkgaXMgUkVQIE1PVlNCIC0gd2hpY2ggc3VwcG9zZWRseSBnb2VzIGFzDQo+ID4gaGln aCBhcyBjYWNoZWxpbmUgc2l6ZSBhY2Nlc3NlcyAtIGJ1dCBwZXJoYXBzIHRob3NlIGdldCBicm9r ZW4gZG93biBmb3INCj4gPiBwaHlzaWNhbCBtZW1vcnkgdGhhdCBoYXMgbm8gZGV2aWNlIGNsYWlt aW5nIGl0Pw0KPiANCj4gQWxsIHRoZSAicmVwIHN0cmluZyIgb3B0aW1pemF0aW9ucyBhcmUgX29u bHlfIGRvbmUgZm9yIHJlZ3VsYXIgbWVtb3J5Lg0KDQpNb3JlIGxpa2VseSBmb3IgcGFnZXMgdGhh dCB1c2VzIHRoZSBkYXRhIGNhY2hlLg0KSXQgb3VnaHQgdG8gYmUgcG9zc2libGUgdG8gbWFwIFBD SWUgbWVtb3J5IHRocm91Z2ggdGhlIGRhdGEgY2FjaGUuDQpXaXRoIGNhcmUgdGhhdCB3b3VsZCBh bGxvdyBsb25nZXIgVExQcyAoZXNwZWNpYWxseSByZWFkIFRMUCkgZm9yDQpjcHUgJ3BpbycgYnVm ZmVyIHRyYW5zZmVycy4NCg0KPiBXaGVuIGl0IGhpdHMgYW55IElPIGFjY2Vzc2VzLCBpdCB3aWxs IGRvIHRoZSBhY2Nlc3NlcyBhdCB0aGUgc3BlY2lmaWVkDQo+IHNpemUgKHNvICJtb3ZzYiIgd2ls bCBkbyBpdCBhIGJ5dGUgYXQgYSB0aW1lKS4NCj4gDQo+IDAuMTYgdXNlYyBwZXIgYnl0ZSBpcyBm YXN0ZXIgdGhhbiB0aGUgdHJhZGl0aW9uYWwgSVNBICdpbmInLCBidXQgbm90DQo+IGJ5IGEgaHVn ZSBmYWN0b3IuDQoNClRoYXQgc3BlZWQgZGVwZW5kcyBvbiB0aGUgdGFyZ2V0LCBJSVJDIG91ciBm cGdhIHRhcmdldCB0YWtlcyAxMjggY2xvY2tzDQphdCA2Mi41TUh6IHRvIHByb2Nlc3MgYSBQQ0ll IHJlYWQgcmVxdWVzdC4NCk5vbmUgb2YgdGhlIGN1cnJlbnQgSW50ZWwgeDg2IGNwdXMgd2lsbCBp c3N1ZSBtdWx0aXBsZSByZWFkIFRMUCBmcm9tDQphIHNpbmdsZSBjb3JlLCBzbyByZWFkcyBuZXZl ciBnZXQgYW55IG92ZXJsYXBwaW5nIGFuZCBzdWZmZXIgdGhlDQpmdWxsIGxhdGVuY3kuDQoNCglE YXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91 bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5 NzM4NiAoV2FsZXMpDQo=