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Miller" , Sasha Levin Subject: [PATCH AUTOSEL for 4.4 151/162] RDS: IB: Fix null pointer issue Thread-Topic: [PATCH AUTOSEL for 4.4 151/162] RDS: IB: Fix null pointer issue Thread-Index: AQHTz5ndg+8bZ9IBkUyXnCjou2vE6g== Date: Mon, 9 Apr 2018 00:29:47 +0000 Message-ID: <20180409002738.163941-151-alexander.levin@microsoft.com> References: <20180409002738.163941-1-alexander.levin@microsoft.com> In-Reply-To: <20180409002738.163941-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB1125;7:8v+jQLLhM4aU/Qx6jYcjXUq8NYL0tYZnSjje02KO8ixUmLfUniflmPErPSF1kkpVrpbjavkW62D/6e9EmyJDsDT+WqiRvUpJYLltKzr4pME35VyaM6fwMTvmzKy5DIDOR4VEYKp/wKtov0fQpH2Bgcl182a9zdVW0DxRpCbsbn9kXqDAm1akPVYwulrU/8UFWlHTBr4f8mgaBLA9f8SV5L5kTdCH9XL20Z/VhzU8C6jTBHUFUirQHSYdRmqrfjS1;20:UpSyUXmYlgWHQqxOhQMEwpuq/MqVG2kwH0ClmuIjQDIjuap+OFrLWfdq8YT0S0SO6xdYpuYkHjzQmY+XOb18TjfSqKnWAAKAhkvsIZkEv+TZXCJ1nYkidcyfsOMQxCp1cgGCsO/rrcWBB6p3DsOYg+5VfxFmO3xMpqz95tyR+hc= X-MS-Office365-Filtering-Correlation-Id: 0a7ca494-5211-4f1b-c1cf-08d59db253df x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(4534165)(4627221)(201703031133081)(201702281549075)(5600026)(4604075)(3008032)(48565401081)(2017052603328)(7193020);SRVR:DM5PR2101MB1125; x-ms-traffictypediagnostic: DM5PR2101MB1125: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171)(146099531331640); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(61425038)(6040522)(2401047)(8121501046)(5005006)(3231221)(944501327)(52105095)(3002001)(93006095)(93001095)(10201501046)(6055026)(61426038)(61427038)(6041310)(20161123560045)(20161123564045)(20161123558120)(20161123562045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(6072148)(201708071742011);SRVR:DM5PR2101MB1125;BCL:0;PCL:0;RULEID:;SRVR:DM5PR2101MB1125; x-forefront-prvs: 0637FCE711 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(346002)(39860400002)(39380400002)(366004)(376002)(396003)(189003)(199004)(2906002)(25786009)(6512007)(10090500001)(3280700002)(10290500003)(6666003)(3660700001)(316002)(110136005)(54906003)(11346002)(107886003)(2616005)(476003)(446003)(36756003)(99286004)(86612001)(53936002)(4326008)(486006)(6436002)(3846002)(81156014)(305945005)(5250100002)(1076002)(102836004)(14454004)(66066001)(5890100001)(7736002)(105586002)(81166006)(59450400001)(106356001)(8676002)(97736004)(6116002)(6506007)(6486002)(5660300001)(186003)(76176011)(22452003)(72206003)(478600001)(2501003)(2900100001)(26005)(86362001)(575784001)(8936002)(68736007)(22906009)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:DM5PR2101MB1125;H:DM5PR2101MB1032.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; x-microsoft-antispam-message-info: 0VzlcKkoP4xQjYV/IBM/XM1TC5zBwUW91cQTdjMSRxBgEL38VtI/i5sgUz91noOccne8XuyJdwhikvumgvfEg/dj+adhQ4+hL5yL7umbFCaEDtQdEUg1M9iOFcS7fUMIeCOUNA11IvFxJL7E4REoijdDiAMbJ3YB2vUErrTq/8rlhusFvl3jSsRosyvYOLeI8dWY7UjPm3swsNuY6HioTV3siaWU5Ejvn9PBQEiliOLcXlAVx4EUtAelHYrXx8eU+4/TKxW0v1GEIyS+aY8iTbvqDx6uZMxhir92UwWPLasAbyQfkczBnS6cV1NTqmmluyd9HNgyJ+G9uB07J3f/CKwdTndExsD6DQ3/BVRaF1oQQOsqL4B/PfLDxK34enL1MdvwLph3UUpOJhlJpRQDJuGExuTf5hEdeDm3Q3utADk= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0a7ca494-5211-4f1b-c1cf-08d59db253df X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Apr 2018 00:29:47.8496 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1125 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Guanglei Li [ Upstream commit 2c0aa08631b86a4678dbc93b9caa5248014b4458 ] Scenario: 1. Port down and do fail over 2. Ap do rds_bind syscall PID: 47039 TASK: ffff89887e2fe640 CPU: 47 COMMAND: "kworker/u:6" #0 [ffff898e35f159f0] machine_kexec at ffffffff8103abf9 #1 [ffff898e35f15a60] crash_kexec at ffffffff810b96e3 #2 [ffff898e35f15b30] oops_end at ffffffff8150f518 #3 [ffff898e35f15b60] no_context at ffffffff8104854c #4 [ffff898e35f15ba0] __bad_area_nosemaphore at ffffffff81048675 #5 [ffff898e35f15bf0] bad_area_nosemaphore at ffffffff810487d3 #6 [ffff898e35f15c00] do_page_fault at ffffffff815120b8 #7 [ffff898e35f15d10] page_fault at ffffffff8150ea95 [exception RIP: unknown or invalid address] RIP: 0000000000000000 RSP: ffff898e35f15dc8 RFLAGS: 00010282 RAX: 00000000fffffffe RBX: ffff889b77f6fc00 RCX:ffffffff81c99d88 RDX: 0000000000000000 RSI: ffff896019ee08e8 RDI:ffff889b77f6fc00 RBP: ffff898e35f15df0 R8: ffff896019ee08c8 R9:0000000000000000 R10: 0000000000000400 R11: 0000000000000000 R12:ffff896019ee08c0 R13: ffff889b77f6fe68 R14: ffffffff81c99d80 R15: ffffffffa022a1e0 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #8 [ffff898e35f15dc8] cma_ndev_work_handler at ffffffffa022a228 [rdma_cm] #9 [ffff898e35f15df8] process_one_work at ffffffff8108a7c6 #10 [ffff898e35f15e58] worker_thread at ffffffff8108bda0 #11 [ffff898e35f15ee8] kthread at ffffffff81090fe6 PID: 45659 TASK: ffff880d313d2500 CPU: 31 COMMAND: "oracle_45659_ap" #0 [ffff881024ccfc98] __schedule at ffffffff8150bac4 #1 [ffff881024ccfd40] schedule at ffffffff8150c2cf #2 [ffff881024ccfd50] __mutex_lock_slowpath at ffffffff8150cee7 #3 [ffff881024ccfdc0] mutex_lock at ffffffff8150cdeb #4 [ffff881024ccfde0] rdma_destroy_id at ffffffffa022a027 [rdma_cm] #5 [ffff881024ccfe10] rds_ib_laddr_check at ffffffffa0357857 [rds_rdma] #6 [ffff881024ccfe50] rds_trans_get_preferred at ffffffffa0324c2a [rds] #7 [ffff881024ccfe80] rds_bind at ffffffffa031d690 [rds] #8 [ffff881024ccfeb0] sys_bind at ffffffff8142a670 PID: 45659 PID: 47039 rds_ib_laddr_check /* create id_priv with a null event_handler */ rdma_create_id rdma_bind_addr cma_acquire_dev /* add id_priv to cma_dev->id_list */ cma_attach_to_dev cma_ndev_work_handler /* event_hanlder is null */ id_priv->id.event_handler Signed-off-by: Guanglei Li Signed-off-by: Honglei Wang Reviewed-by: Junxiao Bi Reviewed-by: Yanjun Zhu Reviewed-by: Leon Romanovsky Acked-by: Santosh Shilimkar Acked-by: Doug Ledford Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/rds/ib.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/rds/ib.c b/net/rds/ib.c index f222885ac0c7..ed51ccc84b3a 100644 --- a/net/rds/ib.c +++ b/net/rds/ib.c @@ -336,7 +336,8 @@ static int rds_ib_laddr_check(struct net *net, __be32 a= ddr) /* Create a CMA ID and try to bind it. This catches both * IB and iWARP capable NICs. */ - cm_id =3D rdma_create_id(&init_net, NULL, NULL, RDMA_PS_TCP, IB_QPT_RC); + cm_id =3D rdma_create_id(&init_net, rds_rdma_cm_event_handler, + NULL, RDMA_PS_TCP, IB_QPT_RC); if (IS_ERR(cm_id)) return PTR_ERR(cm_id); =20 --=20 2.15.1