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 D7258C33CB2 for ; Wed, 15 Jan 2020 16:01:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B32B12187F for ; Wed, 15 Jan 2020 16:01:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728986AbgAOQBd (ORCPT ); Wed, 15 Jan 2020 11:01:33 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:57834 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726483AbgAOQBd (ORCPT ); Wed, 15 Jan 2020 11:01:33 -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-48-aB_HKFAFOgqZVfOEL6ySEg-1; Wed, 15 Jan 2020 16:01:29 +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, 15 Jan 2020 16:01:28 +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, 15 Jan 2020 16:01:28 +0000 From: David Laight To: 'Waiman Long' , Christoph Hellwig CC: Peter Zijlstra , Ingo Molnar , Will Deacon , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: RE: [PATCH] locking/rwsem: Fix kernel crash when spinning on RWSEM_OWNER_UNKNOWN Thread-Topic: [PATCH] locking/rwsem: Fix kernel crash when spinning on RWSEM_OWNER_UNKNOWN Thread-Index: AQHVy6/pULnrp2X9K02rMSrf0oH55Kfr1QMwgAAJ44CAAAJXgA== Date: Wed, 15 Jan 2020 16:01:28 +0000 Message-ID: <8930570b92aa435b941c99dff00c7802@AcuMS.aculab.com> References: <20200114190303.5778-1-longman@redhat.com> <20200115065055.GA21219@lst.de> <021830af-fd89-50e5-ad26-6061e5abdce1@redhat.com> <45b976af3cf74555af7214993e7d614b@AcuMS.aculab.com> <4ac00b33-5397-3c69-6cba-cf3d9d375ea9@redhat.com> In-Reply-To: <4ac00b33-5397-3c69-6cba-cf3d9d375ea9@redhat.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: aB_HKFAFOgqZVfOEL6ySEg-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org RnJvbTogV2FpbWFuIExvbmcNCj4gU2VudDogMTUgSmFudWFyeSAyMDIwIDE1OjQ4DQouLi4NCj4g SXQgZGVwZW5kcy4gSSBmaW5kIGl0IGhhcmQgdG8gcmVhZCBhbiBleHByZXNzaW9uIHdpdGggIiYi IGFuZCAiJiYiDQo+IHdpdGhvdXQgcGFyZW50aGVzZXMuIEFueXdheSwgSSB3aWxsIGFkbWl0IHRo YXQgdGhlIGFib3ZlIGNvZGUgaXMNCj4gaW5jb25zaXN0ZW50IGluIHRlcm0gb2YgaG93IHBhcmVu dGhlc2VzIGFyZSB1c2VkLiBTbyBJIHdpbGwgY2hhbmdlIHRoYXQuDQoNCkNvbmRpdGlvbmFscyBj b250YWluaW5nIGZyYWdtZW50cyBsaWtlIChhID09IGIgJiYgYyA9PSBkICYmIC4uLikNCmFyZSBt dWNoIGVhc2llciB0byByZWFkIHdpdGhvdXQgYW55IGV4dHJhICgpLg0KDQpUaGUgb25seSBwcm9i bGVtIHdpdGggJiYgaXMgdGhhdCB3aGVuIEsmUiBhZGRlZCBpdCB0byBDIHRoZXkgZGlkbid0DQpj aGFuZ2UgdGhlIHByaW9yaXR5IG9mICYgdG8gYmUgaGlnaGVyIHRoYW4gPT0gKHdoZXJlIGl0IHNo b3VsZCBiZSkuDQpBdCB0aGF0IHRpbWUgdGhleSBjb3VsZCBoYXZlIGNoYW5nZWQgYWxsIHRoZSBl eGlzdGluZyBjb2RlLi4uDQpNb2Rlcm4gY29tcGlsZXJzIGRvIHdhcm4gYWJvdXQgKGEgPT0gYiAm IGMpLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5 IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRp b24gTm86IDEzOTczODYgKFdhbGVzKQ0K