Received: by 2002:a25:4158:0:0:0:0:0 with SMTP id o85csp722577yba; Thu, 9 May 2019 05:07:14 -0700 (PDT) X-Google-Smtp-Source: APXvYqysaWanJYlK3LfcxHUowjUC98H66cppmx9ul+1vv0MC1sI/bwKgH0ESleuOJSiVNPz3QQC4 X-Received: by 2002:a17:902:6ac6:: with SMTP id i6mr4566303plt.336.1557403634245; Thu, 09 May 2019 05:07:14 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1557403634; cv=none; d=google.com; s=arc-20160816; b=p7lftZGerx7f5rNoCGZXyjV0ybSAGtWfXoldacYfYhJpcZJ0n9dOIKlDZX/bjXOG4l ZdXlcS3SS2Bge0ozLVvDOI9yxJlTbgChL8wBRO/IV1sy1X/hoPk9fAlGKj4xgT717Idt JjDjOtg8uiCbrz3nMcpcJPV9G/QL5LdeGPgIbAXbPSUOAOhZ4fw/Zdz0nswoWiaGKrFS /UM1dlrmZB9wfVvic0CNdCF5qg6HKBt2IZ73tyJuuG0wbWzPriXlMNvQHemafWOBBumm ZQ+c9Ch4oCs4s9vo24T8pzWPuz81w1JfrFgRhXlo0Tp58vKScLJkW0S5W6R+p6/jrw3G TLWg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :content-id:user-agent:content-language:accept-language:in-reply-to :references:message-id:date:thread-index:thread-topic:subject:cc:to :from:dkim-signature; bh=eTHMGWqmXf80FrNEJ0ydieuBMw7n0HSkV4F2NoGkBAU=; b=nhPNCv/3jsHY0zR+VhcjCp+MwVXk/hNLQyB5+4kY8Zff55SGca3eqYqdSfc1Q6EsTf VG7g+rdq9dAroewR99P/SS2KpoSP0ulal9YIM8dE3KoXOYnZGZyNfZdufWpYcb+0TUru +a/l81CnpJF+0IpWOHO6ZeBVzKCmjqpCwYI02Z7p4bYDAiPsIymrsV4pHVyobkQUiQcU 7BEMdr5XtRhaXbidClALOsQdDCWnBqhdtsb2h4QSxuCWXr84LaRXb2anY4EzNAfb4pSf 8ASiNZyUQ4H6cFm3pMLMzUv8p6Lw+Emw4NTQ1+xjNy/wMX+toXsaiZ93lSqBGfaevDYN E1Rg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@netapp.onmicrosoft.com header.s=selector1-netapp-com header.b=mNMmIXpE; spf=pass (google.com: best guess record for domain of linux-nfs-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id x4si2514091plv.329.2019.05.09.05.06.51; Thu, 09 May 2019 05:07:14 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-nfs-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@netapp.onmicrosoft.com header.s=selector1-netapp-com header.b=mNMmIXpE; spf=pass (google.com: best guess record for domain of linux-nfs-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726141AbfEIMGr (ORCPT + 99 others); Thu, 9 May 2019 08:06:47 -0400 Received: from mail-eopbgr780074.outbound.protection.outlook.com ([40.107.78.74]:11971 "EHLO NAM03-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725961AbfEIMGr (ORCPT ); Thu, 9 May 2019 08:06:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=netapp.onmicrosoft.com; s=selector1-netapp-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=eTHMGWqmXf80FrNEJ0ydieuBMw7n0HSkV4F2NoGkBAU=; b=mNMmIXpEthHa+I6PZ8iDh2SDuvZp/i+CV3cGRymV/LFZt82LkvuWi+9n8uIo9UBn4xZcwO2jb4Tjj4GnlMRtTVUFvOtdCaVffAZHLEhDA7Z/zWyaajAHqD1czj+2maDaCPFJNvghXkegJQxUdaBL3gSQFWkUpTB/r2Pr1/f/47k= Received: from BN8PR06MB6228.namprd06.prod.outlook.com (20.178.217.156) by BN8PR06MB6164.namprd06.prod.outlook.com (20.178.213.213) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1856.12; Thu, 9 May 2019 12:06:44 +0000 Received: from BN8PR06MB6228.namprd06.prod.outlook.com ([fe80::7d92:449d:f9a5:fee2]) by BN8PR06MB6228.namprd06.prod.outlook.com ([fe80::7d92:449d:f9a5:fee2%3]) with mapi id 15.20.1856.012; Thu, 9 May 2019 12:06:44 +0000 From: "Schumaker, Anna" To: "bcodding@redhat.com" CC: "syzkaller-bugs@googlegroups.com" , "linux-nfs@vger.kernel.org" , "syzbot+228a82b263b5da91883d@syzkaller.appspotmail.com" , "linux-kernel@vger.kernel.org" , "trond.myklebust@hammerspace.com" , "rbergant@redhat.com" Subject: Re: WARNING: locking bug in nfs_get_client Thread-Topic: WARNING: locking bug in nfs_get_client Thread-Index: AQHVBfyRNa/IsYWUv0STpJf4EP3ppqZin14AgAAL7ACAAAgRgA== Date: Thu, 9 May 2019 12:06:44 +0000 Message-ID: References: <000000000000c3e9dc0588695e22@google.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Evolution 3.32.1 authentication-results: spf=none (sender IP is ) smtp.mailfrom=Anna.Schumaker@netapp.com; x-originating-ip: [23.28.75.121] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 91113371-3073-4079-72ee-08d6d476cdf5 x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600141)(711020)(4605104)(2017052603328)(7193020);SRVR:BN8PR06MB6164; x-ms-traffictypediagnostic: BN8PR06MB6164: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; x-forefront-prvs: 003245E729 x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(366004)(136003)(346002)(376002)(396003)(39860400002)(189003)(199004)(8936002)(6436002)(66446008)(64756008)(66556008)(66476007)(14454004)(66946007)(7736002)(91956017)(76116006)(73956011)(6486002)(256004)(5660300002)(66066001)(26005)(6512007)(6506007)(476003)(446003)(54906003)(2616005)(53546011)(25786009)(5024004)(14444005)(11346002)(81166006)(1730700003)(81156014)(305945005)(186003)(8676002)(102836004)(2906002)(86362001)(2501003)(36756003)(3846002)(4326008)(76176011)(58126008)(5640700003)(6116002)(478600001)(6916009)(99286004)(71190400001)(68736007)(316002)(118296001)(71200400001)(72206003)(6246003)(486006)(53936002)(2351001)(229853002);DIR:OUT;SFP:1101;SCL:1;SRVR:BN8PR06MB6164;H:BN8PR06MB6228.namprd06.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: netapp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: p2hPr0Ud2syURkJEY2QhgDBxFOS2iWJeuny4Ybxz9LMEa9imAigt5+xAPyO4SvLXCluCAUPDBs+rrN48Lb+jC1103vkiDCRqy06ee+M6tYRntsSALkepBm4Y2vyqaHpwt88oC7Jyz+hPUxzD9L+flpzsbzgftNcF7nlZD/S3VL6Ga8nZQFn7bSC+xCK7/MXjY8+UDZf3J0XWo0oWW5mWckntq8riAktO/SfuP/CUIsGKjzs5WLtvtX4ofj+XsyvNyHDGNUNPL95uE7+wGNO6zMTqdTxieMum3NkPlP7H81PyztbBl43hhRJah5Hy6/GCappM/VR/GLOOUXK7Njf4Q4hRHamMPWOHZSdfQHSQ2vLmN6ptCIntGLS3utPU6C02kP+bJqiRCoM2mU7F0bEY8BU3Z9oUoLXkgHXIDryfuQo= Content-Type: text/plain; charset="utf-8" Content-ID: <11B36E6EF59C2E40995F64F73D969AB0@namprd06.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: netapp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 91113371-3073-4079-72ee-08d6d476cdf5 X-MS-Exchange-CrossTenant-originalarrivaltime: 09 May 2019 12:06:44.4281 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4b0911a0-929b-4715-944b-c03745165b3a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN8PR06MB6164 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org T24gVGh1LCAyMDE5LTA1LTA5IGF0IDA3OjM3IC0wNDAwLCBCZW5qYW1pbiBDb2RkaW5ndG9uIHdy b3RlOg0KPiBOZXRBcHAgU2VjdXJpdHkgV0FSTklORzogVGhpcyBpcyBhbiBleHRlcm5hbCBlbWFp bC4gRG8gbm90IGNsaWNrIGxpbmtzIG9yIG9wZW4NCj4gYXR0YWNobWVudHMgdW5sZXNzIHlvdSBy ZWNvZ25pemUgdGhlIHNlbmRlciBhbmQga25vdyB0aGUgY29udGVudCBpcyBzYWZlLg0KPiANCj4g DQo+IA0KPiANCj4gSSB0aGluayBuZnNfZ2V0X2NsaWVudCBhbmQgbmZzX21hdGNoX2NsaWVudCBj b3VsZCB1c2UgYSByZWZhY3Rvci4uIGJ1dA0KPiB0aGUNCj4gdHJpdmlhbCBmaXggaXM6DQoNClRo YW5rcywgQmVuISBJJ2xsIGdvIHdpdGggdGhpcyBmaXggZm9yIG5vdywgYW5kIHdlIGNhbiBhbHdh eXMgY2xlYW4gdXAgdGhlDQpmdW5jdGlvbiBsYXRlci4NCg0KQW5uYQ0KDQo+IA0KPiA4PC0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLQ0KPiANCj4gIEZyb20gNGVmMmZjNTkxMmM1OTgw ODkwZTc4MWY4YzBkOTQxMzMwMjU0YzEwMCBNb24gU2VwIDE3IDAwOjAwOjAwIDIwMDENCj4gTWVz c2FnZS1JZDoNCj4gPDRlZjJmYzU5MTJjNTk4MDg5MGU3ODFmOGMwZDk0MTMzMDI1NGMxMDAuMTU1 NzQwMTQ2Ny5naXQuYmNvZGRpbmdAcmVkaGF0LmNvbT4NCj4gIEZyb206IEJlbmphbWluIENvZGRp bmd0b24gPGJjb2RkaW5nQHJlZGhhdC5jb20+DQo+IERhdGU6IFRodSwgOSBNYXkgMjAxOSAwNzoy NToyMSAtMDQwMA0KPiBTdWJqZWN0OiBbUEFUQ0hdIE5GUzogRml4IGEgZG91YmxlIHVubG9jayBm cm9tIG5mc19tYXRjaCxnZXRfY2xpZW50DQo+IA0KPiBOb3cgdGhhdCBuZnNfbWF0Y2hfY2xpZW50 IGRyb3BzIHRoZSBuZnNfY2xpZW50X2xvY2ssIHdlIHNob3VsZCBiZQ0KPiBjYXJlZnVsDQo+IHRv IGFsd2F5cyByZXR1cm4gaXQgaW4gdGhlIHNhbWUgY29uZGl0aW9uOiBsb2NrZWQuDQo+IA0KPiBG aXhlczogOTUwYTU3OGM2MTI4ICgiTkZTOiBtYWtlIG5mc19tYXRjaF9jbGllbnQga2lsbGFibGUi KQ0KPiBSZXBvcnRlZC1ieTogc3l6Ym90KzIyOGE4MmIyNjNiNWRhOTE4ODNkQHN5emthbGxlci5h cHBzcG90bWFpbC5jb20NCj4gU2lnbmVkLW9mZi1ieTogQmVuamFtaW4gQ29kZGluZ3RvbiA8YmNv ZGRpbmdAcmVkaGF0LmNvbT4NCj4gLS0tDQo+ICAgZnMvbmZzL2NsaWVudC5jIHwgMiArLQ0KPiAg IDEgZmlsZSBjaGFuZ2VkLCAxIGluc2VydGlvbigrKSwgMSBkZWxldGlvbigtKQ0KPiANCj4gZGlm ZiAtLWdpdCBhL2ZzL25mcy9jbGllbnQuYyBiL2ZzL25mcy9jbGllbnQuYw0KPiBpbmRleCAwNmU4 NzE5NjU1ZjAuLmRhNzRjNGM0YTI0NCAxMDA2NDQNCj4gLS0tIGEvZnMvbmZzL2NsaWVudC5jDQo+ ICsrKyBiL2ZzL25mcy9jbGllbnQuYw0KPiBAQCAtMjk5LDkgKzI5OSw5IEBAIHN0YXRpYyBzdHJ1 Y3QgbmZzX2NsaWVudCAqbmZzX21hdGNoX2NsaWVudChjb25zdA0KPiBzdHJ1Y3QgbmZzX2NsaWVu dF9pbml0ZGF0YSAqZGF0DQo+ICAgICAgICAgICAgICAgICAgICAgICAgIHNwaW5fdW5sb2NrKCZu bi0+bmZzX2NsaWVudF9sb2NrKTsNCj4gICAgICAgICAgICAgICAgICAgICAgICAgZXJyb3IgPSBu ZnNfd2FpdF9jbGllbnRfaW5pdF9jb21wbGV0ZShjbHApOw0KPiAgICAgICAgICAgICAgICAgICAg ICAgICBuZnNfcHV0X2NsaWVudChjbHApOw0KPiArICAgICAgICAgICAgICAgICAgICAgICBzcGlu X2xvY2soJm5uLT5uZnNfY2xpZW50X2xvY2spOw0KPiAgICAgICAgICAgICAgICAgICAgICAgICBp ZiAoZXJyb3IgPCAwKQ0KPiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHJldHVybiBF UlJfUFRSKGVycm9yKTsNCj4gLSAgICAgICAgICAgICAgICAgICAgICAgc3Bpbl9sb2NrKCZubi0+ bmZzX2NsaWVudF9sb2NrKTsNCj4gICAgICAgICAgICAgICAgICAgICAgICAgZ290byBhZ2FpbjsN Cj4gICAgICAgICAgICAgICAgIH0NCj4gDQo+IC0tDQo+IDIuMjAuMQ0K