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=-3.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 3F108C76194 for ; Tue, 23 Jul 2019 23:00:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 085392238C for ; Tue, 23 Jul 2019 23:00:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="TT2UnE97"; dkim=pass (1024-bit key) header.d=fb.onmicrosoft.com header.i=@fb.onmicrosoft.com header.b="bRtFscHH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392540AbfGWXAv (ORCPT ); Tue, 23 Jul 2019 19:00:51 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:6918 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728418AbfGWXAu (ORCPT ); Tue, 23 Jul 2019 19:00:50 -0400 Received: from pps.filterd (m0001303.ppops.net [127.0.0.1]) by m0001303.ppops.net (8.16.0.27/8.16.0.27) with SMTP id x6NMuwDe001927; Tue, 23 Jul 2019 16:00:31 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : references : in-reply-to : content-type : content-id : content-transfer-encoding : mime-version; s=facebook; bh=jbucP9JwNJJ0gB3wFfWuRzH8Xd5FNvd3jQEaGRRB1zU=; b=TT2UnE97c9XxVgeN+fjLN5uTXLyj4qXKxhaaQVDDjJ2eaeeGuxa/TahzfO3uPB9PxJXf TEycnh6npjsCPjG/tZoAwSyFHhUxQuhk0vU4Zb0ah2N15TOxR1fAjcf1HUvXDcN+jBDu ehHMM9AFrcLY3bV/8lkMFB4bPIU4aHIct54= Received: from maileast.thefacebook.com ([163.114.130.16]) by m0001303.ppops.net with ESMTP id 2tx613hcgy-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Tue, 23 Jul 2019 16:00:30 -0700 Received: from ash-exhub204.TheFacebook.com (2620:10d:c0a8:83::4) by ash-exhub103.TheFacebook.com (2620:10d:c0a8:82::c) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Tue, 23 Jul 2019 16:00:30 -0700 Received: from NAM03-BY2-obe.outbound.protection.outlook.com (100.104.31.183) by o365-in.thefacebook.com (100.104.36.100) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.1713.5 via Frontend Transport; Tue, 23 Jul 2019 16:00:30 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=mzHdsuGLv+A3alys/R0Auhm414MJ8YJ1kDpD439beG3wZWjdE4/b3pM7dwKZRQP6fWcFX6sRNsec7Y5EtcYNav2NyHdHzlKEd2Sx9PK2fuiw0cRzszlhWDl4xqXqA+G2QoNXbvVQW3Y0i82zbAzt5plIHFBCQ3Jf7F5vCwFvGvnv5T0HubkPfRFKKh1+yvzkTUJk1JA1ym0YznM0JgEmhe1vhvwQZ/ZqEshWW6Y+3R8S+fhR2li+98wbJRlE0NelEnfRSyOTXcDOVwvnyHbSVEamV5qw3pYmz8xarcIANSvSqz0R3rM2Skcev6UtIta52R5KhOFb5jbltR7zHXOfSQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=jbucP9JwNJJ0gB3wFfWuRzH8Xd5FNvd3jQEaGRRB1zU=; b=IYt2g5THwxYi95UHW3naksWBkxaV/PiuORBi7FD755Eb/b/oZImew2goDwuMUts00OH+PTda9vq38gbrtAVBUewpQVGyS47j82fX6TiQs7MMcj2pvjoSQqbP/UwkxlLuAlHWC/k+9WyJSvzWVC9MQNNXYp780/XBQlCu6+hMEfQiy4+Txbl7HizeRbQj8LSygADjWWRgGUPlOJwvMDhEZ31VYAnSbDnfKoev1rywrjqvPU1R6QNHIeGI1XJ7sHumOR8zoblr15GQ4hYGmcc+RMY91o35wLB8hdoj/tevKLyntjCgCEZvvQeqhwER2JX2xPCam8WlIZ2QBEIaLORamg== ARC-Authentication-Results: i=1; mx.microsoft.com 1;spf=pass smtp.mailfrom=fb.com;dmarc=pass action=none header.from=fb.com;dkim=pass header.d=fb.com;arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.onmicrosoft.com; s=selector1-fb-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=jbucP9JwNJJ0gB3wFfWuRzH8Xd5FNvd3jQEaGRRB1zU=; b=bRtFscHHXqjgOfSMQo5MUg7Pj/8MRL0fsMXvKAODEh+H7ZO1Ejlg+aycbpFWlsQF87PoL30EDGXyphty7/l0IRcjd80MW3eOTPf7k8iPzqzQaS/mS1qwTb1Gmg0F58r6mJPIOlVcaa7OJ2+2BM9ktrvZCnnnRUPQFhVVbdJOXiE= Received: from BYAPR15MB2501.namprd15.prod.outlook.com (52.135.196.11) by BYAPR15MB2550.namprd15.prod.outlook.com (20.179.155.19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2094.16; Tue, 23 Jul 2019 23:00:29 +0000 Received: from BYAPR15MB2501.namprd15.prod.outlook.com ([fe80::b964:e4e:5b14:fa7]) by BYAPR15MB2501.namprd15.prod.outlook.com ([fe80::b964:e4e:5b14:fa7%6]) with mapi id 15.20.2094.013; Tue, 23 Jul 2019 23:00:29 +0000 From: Alexei Starovoitov To: Song Liu , Andrii Nakryiko CC: bpf , "netdev@vger.kernel.org" , "daniel@iogearbox.net" , "andrii.nakryiko@gmail.com" , Kernel Team Subject: Re: [PATCH v2 bpf-next] libbpf: provide more helpful message on uninitialized global var Thread-Topic: [PATCH v2 bpf-next] libbpf: provide more helpful message on uninitialized global var Thread-Index: AQHVQZtC9YSAmDIItkuvtd1TWhTZi6bYwbuAgAAP4YA= Date: Tue, 23 Jul 2019 23:00:28 +0000 Message-ID: <44ae07d3-7f53-8062-69e1-9fdf9b3ecc9e@fb.com> References: <20190723211133.1666218-1-andriin@fb.com> <08DD65ED-34B4-47C0-B5ED-9A354CF5BA35@fb.com> In-Reply-To: <08DD65ED-34B4-47C0-B5ED-9A354CF5BA35@fb.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR12CA0025.namprd12.prod.outlook.com (2603:10b6:301:2::11) To BYAPR15MB2501.namprd15.prod.outlook.com (2603:10b6:a02:88::11) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [2620:10d:c090:200::3:46e3] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: ef16a9dd-d29b-45e4-80f6-08d70fc18e3c x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020);SRVR:BYAPR15MB2550; x-ms-traffictypediagnostic: BYAPR15MB2550: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:126; x-forefront-prvs: 0107098B6C x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(346002)(136003)(366004)(376002)(396003)(39860400002)(189003)(199004)(66556008)(66476007)(66946007)(5660300002)(81166006)(25786009)(81156014)(64756008)(4744005)(14454004)(66446008)(4326008)(256004)(15650500001)(86362001)(31696002)(99286004)(110136005)(6486002)(229853002)(54906003)(316002)(2906002)(8936002)(71200400001)(186003)(36756003)(6506007)(6116002)(53936002)(53546011)(76176011)(478600001)(52116002)(71190400001)(386003)(6246003)(102836004)(11346002)(446003)(305945005)(46003)(476003)(2616005)(68736007)(486006)(7736002)(31686004)(6436002)(8676002)(6636002)(6512007);DIR:OUT;SFP:1102;SCL:1;SRVR:BYAPR15MB2550;H:BYAPR15MB2501.namprd15.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: fb.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: SXLe+7Gg8RnNR1vr461Z22CKqSdJ2DmKiNe+HA7swEbEKcfSFIlGFiN6veXwVSQ9GkEBIYfj9n2fNzzDKv7GRkVKa3UlThQlrK0VUX9bKlEDTGaJaI3wjva2yQMLl4pIDnPHpfS4qR0kd0NKZBqb4QJKC2myOR9hADCi8IquurTzaS2mloCg2AHzFzAs8a3UKi5/2SylQi5OCZMKteJzl8wfzjbS157eQ37cqGd6U6OaJX5qYvvfZCA9SUmzG4v6A8914/S3MfvCCrmydPLYHEikL6ayj2EckgIO1Pshw2NWuy9WQ0Xq4w96ShJ4jBTebqIbY2uNE032PC8kqotv2adPppubsE/p/mIIzNtvEEjn0Tr5WHtq6VcNkqCyRqLRLERFpX0s8AUmFoyEXE4nLpdYeiXXcgeY0gaAdYLxgXk= Content-Type: text/plain; charset="utf-8" Content-ID: <7F5488A90117B64EA41281875F4CAA9A@namprd15.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: ef16a9dd-d29b-45e4-80f6-08d70fc18e3c X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Jul 2019 23:00:28.8547 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ast@fb.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR15MB2550 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-07-23_09:,, signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=635 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1907230235 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org T24gNy8yMy8xOSAzOjAzIFBNLCBTb25nIExpdSB3cm90ZToNCj4+IE9uIEp1bCAyMywgMjAxOSwg YXQgMjoxMSBQTSwgQW5kcmlpIE5ha3J5aWtvPGFuZHJpaW5AZmIuY29tPiAgd3JvdGU6DQo+Pg0K Pj4gV2hlbiBCUEYgcHJvZ3JhbSBkZWZpbmVzIHVuaW5pdGlhbGl6ZWQgZ2xvYmFsIHZhcmlhYmxl LCBpdCdzIHB1dCBpbnRvDQo+PiBhIHNwZWNpYWwgQ09NTU9OIHNlY3Rpb24uIExpYmJwZiB3aWxs IHJlamVjdCBzdWNoIHByb2dyYW1zLCBidXQgd2lsbA0KPj4gcHJvdmlkZSB2ZXJ5IHVuaGVscGZ1 bCBtZXNzYWdlIHdpdGggZ2FyYmFnZS1sb29raW5nIHNlY3Rpb24gaW5kZXguDQo+Pg0KPj4gVGhp cyBwYXRjaCBkZXRlY3RzIHNwZWNpYWwgc2VjdGlvbiBjYXNlcyBhbmQgZ2l2ZXMgbW9yZSBleHBs aWNpdCBlcnJvcg0KPj4gbWVzc2FnZS4NCj4+DQo+PiBTaWduZWQtb2ZmLWJ5OiBBbmRyaWkgTmFr cnlpa288YW5kcmlpbkBmYi5jb20+DQo+IEFja2VkLWJ5OiBTb25nIExpdTxzb25nbGl1YnJhdmlu Z0BmYi5jb20+DQo+IA0KDQpBcHBsaWVkLiBUaGFua3MNCg==