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Wed, 30 Oct 2019 19:58:33 +0000 From: Chaitanya Kulkarni To: Daniel Wagner , "linux-nvme@lists.infradead.org" CC: Sagi Grimberg , Johannes Thumshirn , "linux-kernel@vger.kernel.org" , Christoph Hellwig Subject: Re: [RFC] nvmet: Always remove processed AER elements from list Thread-Topic: [RFC] nvmet: Always remove processed AER elements from list Thread-Index: AQHVjzYhgmqnvQGm+02Suay/wXEq1Q== Date: Wed, 30 Oct 2019 19:58:32 +0000 Message-ID: References: <20191030152418.23753-1-dwagner@suse.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Chaitanya.Kulkarni@wdc.com; x-originating-ip: [199.255.45.62] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: f6cb92c6-92c6-4062-0ffe-08d75d738af4 x-ms-traffictypediagnostic: BYAPR04MB5271: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:5797; x-forefront-prvs: 02065A9E77 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(4636009)(376002)(346002)(39860400002)(366004)(136003)(396003)(199004)(189003)(64756008)(305945005)(7736002)(2501003)(316002)(53546011)(186003)(6506007)(99286004)(76176011)(26005)(102836004)(52536014)(14444005)(7696005)(54906003)(74316002)(3846002)(66446008)(33656002)(256004)(66476007)(6116002)(25786009)(2906002)(110136005)(5660300002)(66946007)(66556008)(14454004)(8676002)(66066001)(478600001)(229853002)(76116006)(446003)(4326008)(81166006)(81156014)(6436002)(71200400001)(6246003)(9686003)(476003)(486006)(86362001)(71190400001)(55016002)(8936002);DIR:OUT;SFP:1102;SCL:1;SRVR:BYAPR04MB5271;H:BYAPR04MB5749.namprd04.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: ZsqYO+yV7FAjp29DJlg9sYYlyAdF1B+JsXidZFe4X6b4tdyT3XFGQZOqajG3Yp5I8eUepRBEigEzYpHjWcRCoU4IG3Fb5lzS95uzfqmJkm3tgKrEpDacj8OyxwH8gxlC5fo2xiUluQlgs+dlxrCj0YK3WhgZpGbUOu2oVnPzs/9ZT1AWSi7v5bvIWgucZRIHQJknI5l/JN8tW1DKQrYFx5aPirXCbHfUXYkEuxsn6/GFHPL0S+MPNBFsBENBGMjrLgENKPxxdrLbYSCjtpyTwv4g1oGVZd6RrMYui54I/cAP6rFX8vzvgAcqZHv5VsuZpMBeG27aPfC7GPh7Iu6NUtzNBgvIiVM6+5ggufql+LjO9CnRSxOtERu1QOmy8nNhazgNJ7UV7rE5NiJ+2TYFhwm+KDnJR4x+h/25ZB01Cok6tB2hXTlZeDaXW2pkMr5E x-ms-exchange-transport-forked: True Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: f6cb92c6-92c6-4062-0ffe-08d75d738af4 X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Oct 2019 19:58:32.8318 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: xfMHjrxZCeXkn+qLBsNeRAn2dKR6sUZTqLGlYpl8Xe7wYOv36jzInAyQikXOAPiSpqaPpzg6mQPAdgHAhFxwPn/8wWEbgWzB0ts6YCw68mE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR04MB5271 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/30/2019 08:24 AM, Daniel Wagner wrote:=0A= > Hi,=0A= >=0A= > I've got following oops:=0A= >=0A= > PID: 79413 TASK: ffff92f03a814ec0 CPU: 19 COMMAND: "kworker/19:2"=0A= > #0 [ffffa5308b8c3c58] machine_kexec at ffffffff8e05dd02=0A= > #1 [ffffa5308b8c3ca8] __crash_kexec at ffffffff8e12102a=0A= > #2 [ffffa5308b8c3d68] crash_kexec at ffffffff8e122019=0A= > #3 [ffffa5308b8c3d80] oops_end at ffffffff8e02e091=0A= > #4 [ffffa5308b8c3da0] general_protection at ffffffff8e8015c5=0A= > [exception RIP: nvmet_async_event_work+94]=0A= > RIP: ffffffffc0d9a80e RSP: ffffa5308b8c3e58 RFLAGS: 00010202=0A= > RAX: dead000000000100 RBX: ffff92dcbc7464b0 RCX: 0000000000000002= =0A= > RDX: 0000000000040002 RSI: 38ffff92dc9814cf RDI: ffff92f217722f20= =0A= > RBP: ffff92dcbc746418 R8: 0000000000000000 R9: 0000000000000000= =0A= > R10: 000000000000035b R11: ffff92efb8dd2091 R12: ffff92dcbc7464a0= =0A= > R13: ffff92dbe03a5f29 R14: 0000000000000000 R15: 0ffff92f92f26864= =0A= > ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018=0A= > #5 [ffffa5308b8c3e78] process_one_work at ffffffff8e0a3b0c=0A= > #6 [ffffa5308b8c3eb8] worker_thread at ffffffff8e0a41e7=0A= > #7 [ffffa5308b8c3f10] kthread at ffffffff8e0a93af=0A= > #8 [ffffa5308b8c3f50] ret_from_fork at ffffffff8e800235=0A= >=0A= > this maps to nvmet_async_event_results. So it looks like this function=0A= > access a stale aen pointer:=0A= >=0A= > static u32 nvmet_async_event_result(struct nvmet_async_event *aen)=0A= > {=0A= > return aen->event_type | (aen->event_info << 8) | (aen->log_page= << 16);=0A= > }=0A= Can you please explain the test setup ? Is that coming from the tests =0A= present in the blktests ? if so you can please provide test number ?=0A=