Received: by 2002:ad5:4acb:0:0:0:0:0 with SMTP id n11csp975473imw; Fri, 15 Jul 2022 17:18:16 -0700 (PDT) X-Google-Smtp-Source: AGRyM1sNP6VExkzwJ2A8K25ve+5r83M2iDJs5OV2maSiGwPMtfTus2o71uzJijaexS8ReEbh5et2 X-Received: by 2002:a63:1816:0:b0:3fc:c510:c839 with SMTP id y22-20020a631816000000b003fcc510c839mr14333160pgl.470.1657930696071; Fri, 15 Jul 2022 17:18:16 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1657930696; cv=pass; d=google.com; s=arc-20160816; b=BqNZ0xjQwMBnzMchVrVGL6Wy7W+0ZdRA/vC9AnOx7xPI4/wzn/9eZ8QfBzDLmKwLlC Ju3QSgS3MkM3RqnVQLrl8OzVRz4ymTXiibF5P3W7OGafBB2hhwbF0A93JWydPYP9q0XQ ij4RfzbD80N4/W0s2s4DTS5R7YdPpn5SiEAta79GivGL+lgoQ0uZ2kCwjdKrp/xCqwml e06/wkXXX2rYNJ8Gmblw5SEBmAR9nN9j+go9i2FZd2QN9XZ2PDPgZIXQWIYn1IQSBqlo BA6boG2Znz+gswIcE0n62iSBSu/iOIVn63mbvHJfHuzI6AfeEZd70yCqFCDS/ZydpsX/ DSyQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:content-transfer-encoding :in-reply-to:from:references:cc:to:content-language:subject :user-agent:date:message-id:dkim-signature; bh=YjEwYTQODu+htH+ET6TKFtzX0f8MG5w39Q/sUQ2uJXk=; b=p11qhLvdxAFE2dSrGwsxkvceNx0rc7kN7kD9XFHRtVV/cVrjWZe85LXNQl4YjDPgP4 jYx1HPV/MJNBz7VgjULrEDYVGu15ZqAA8XRZNwyyevTB0t/AXsyObD/vgxEATtPa6bFZ 6kAmAEGBst46swX4551hECozkjHAQfn7P4tUrx/hCukTMUUiTPPlWcIgrxivlZQ6FM1o DIuBW+GGoQi8TeKKSmowEiNlT60ePJDmBCs/zPcRT5Nxw8D6bRMPSuZ/BMG9Oampq+qo Am0SdJcV+3WuDH4oB8WK3dss/rZqjcKIdcMm7cVSpIof+pK8f0TFospGgvZdFqDQ0Lfm 2IXg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@fb.com header.s=facebook header.b="jaW32/hR"; arc=pass (i=1 spf=pass spfdomain=fb.com dkim=pass dkdomain=fb.com dmarc=pass fromdomain=fb.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=fb.com Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id a17-20020a17090ad81100b001ef888bd595si9724449pjv.118.2022.07.15.17.17.52; Fri, 15 Jul 2022 17:18:16 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@fb.com header.s=facebook header.b="jaW32/hR"; arc=pass (i=1 spf=pass spfdomain=fb.com dkim=pass dkdomain=fb.com dmarc=pass fromdomain=fb.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=fb.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231423AbiGPAEC (ORCPT + 99 others); Fri, 15 Jul 2022 20:04:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50170 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229507AbiGPAEB (ORCPT ); Fri, 15 Jul 2022 20:04:01 -0400 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A0C5214D2C; Fri, 15 Jul 2022 17:03:59 -0700 (PDT) Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 26FKnLCd026456; Fri, 15 Jul 2022 17:03:31 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=message-id : date : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding : mime-version; s=facebook; bh=YjEwYTQODu+htH+ET6TKFtzX0f8MG5w39Q/sUQ2uJXk=; b=jaW32/hRBtU89sJh/h/udKZBm1NiQh1/o/kQvLX4ZCI/bdy44CtalSPq3scFGEESEar5 EWXFUzUEdwniEFOTGcO86SmUuNNyHhIdUITJtHvhBDiN/LuFEeoQqkQr6dNaEdes3RVM muJYhAbeWNH5JB8pebPyA0VVNi0Li3alqLI= Received: from nam11-dm6-obe.outbound.protection.outlook.com (mail-dm6nam11lp2174.outbound.protection.outlook.com [104.47.57.174]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3haxdg6hdd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 15 Jul 2022 17:03:30 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Erl0DP6P/mwZogE598eZZ6Hab4GC/CpAlBm/rAjWF9o+c3MfEuLYkyO8OShSfXhgG1pexMuoyBglUiXTJkEb2jzSGv0V2I3FNo9ncvbuFcQUuUW5Ie7Rw6qa8eDY0MXqCmdkvkw9M2aU1nxS5ZL9TJaQAAMhrcgvIs3rpB4tjuGnuRssKVQexN83sTnmDpefzH/57mHc4yNHPHk61bhNmPjIILGYOieGDGFElvKzxr4m9S6ylOsRFurpV5+dQPHnJ+jF1LNRBifx3jvY02+5j/PuyQi9sJuUC1gZEYfdyJqzXliwQEZ9EAIgp3KoPL+3mcqIoXaD0PUZE+0bkZc+lg== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=YjEwYTQODu+htH+ET6TKFtzX0f8MG5w39Q/sUQ2uJXk=; b=TQVEArPCkXWd6DklYlvYI+ZOJ8MSyOhrDiUXq/4T9mDk0A2EK/gRqDH5gWYfPR4DqiN/8QGzRxGFkSe0L9sPH1cgAVVE5pTh3v7mMgwZXYyZwkJ/AT5kM9EEn7mb+k7O4MwinXQFsdt/X+3x0Z+5DkdZlftpHKhlGeT4Un7izxxY/W1Bp1qcoK+iJTLkvPDCSz6uByiXvZF1xUnFiechzO1I4Z4drIicHupxDpi5m6CmjZjy8pq18wjnAYn6sAh+hr1W0z2Lg2ZEMfC5eFF4eSdxggaihKjgIgwRqZ/mIAdErEH8jQ72pGw4l/fxR2Y4HS6B5FDRB43ZihiyZdfrfQ== 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 Received: from SN6PR1501MB2064.namprd15.prod.outlook.com (2603:10b6:805:d::27) by BYAPR15MB3448.namprd15.prod.outlook.com (2603:10b6:a03:103::28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5438.14; Sat, 16 Jul 2022 00:03:27 +0000 Received: from SN6PR1501MB2064.namprd15.prod.outlook.com ([fe80::9568:e5d9:b8ab:bb23]) by SN6PR1501MB2064.namprd15.prod.outlook.com ([fe80::9568:e5d9:b8ab:bb23%6]) with mapi id 15.20.5438.017; Sat, 16 Jul 2022 00:03:27 +0000 Message-ID: Date: Fri, 15 Jul 2022 17:03:24 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH bpf-next v6 03/23] bpf/verifier: do not clear meta in check_mem_size Content-Language: en-US To: Benjamin Tissoires , Greg KH , Jiri Kosina , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , John Fastabend , KP Singh , Shuah Khan , Dave Marchevsky , Joe Stringer , Jonathan Corbet Cc: Tero Kristo , linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org References: <20220712145850.599666-1-benjamin.tissoires@redhat.com> <20220712145850.599666-4-benjamin.tissoires@redhat.com> From: Yonghong Song In-Reply-To: <20220712145850.599666-4-benjamin.tissoires@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: BYAPR06CA0033.namprd06.prod.outlook.com (2603:10b6:a03:d4::46) To SN6PR1501MB2064.namprd15.prod.outlook.com (2603:10b6:805:d::27) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 38a1b64b-a2a1-4541-5041-08da66be9be4 X-MS-TrafficTypeDiagnostic: BYAPR15MB3448:EE_ X-FB-Source: Internal X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR1501MB2064.namprd15.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230016)(4636009)(376002)(39860400002)(346002)(136003)(396003)(366004)(31696002)(86362001)(921005)(4744005)(38100700002)(8936002)(478600001)(6486002)(5660300002)(7416002)(316002)(110136005)(66946007)(8676002)(66556008)(4326008)(186003)(36756003)(6506007)(31686004)(53546011)(41300700001)(2616005)(2906002)(6512007)(6666004)(66476007)(45980500001)(43740500002);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?NHZKODZwYW5HZzJ3RWg1dGdLd0NxVS9aVWNLNWQ0Tjd0RmN6eStRTUFxY29G?= =?utf-8?B?cUZmcEVQeU5xZm03VHFxdUhqODQrVTE2NlNZL3dYUUYrYnh1S3VuaGgxRUw1?= =?utf-8?B?bWo5Zzh2aU95Nnh3R2lwM2JnNWN5a1dXcmNjZnJOSHJ0bTd3UitrdFhVcFRn?= =?utf-8?B?dVcrOHp1TkhvZFFQbmtac21NU0RzeFJ3WUR4eGdQZlY2Y0NvVHp3MWFVZlBw?= =?utf-8?B?Q2RxUjJZZ3BwRTIrdk9lTk9ZRFozTXJYL2tpczJGRTBNRUNLcU15QzR0Mk80?= =?utf-8?B?OVByaXB1SUdna014cHpxOEd1dXd0eGxnMEtVU1RTbGN5ZFVxd0o1L3VURkl5?= =?utf-8?B?VEJ1QXBmekhzVzIwQmFPMVdLRGhpdU4vaC9pWTk5SjViTjl2aU10QURhTU53?= =?utf-8?B?N3d4ZkVjSGRYWDJWN2dDYnFDcnBiVHB4MW91VGVyNWJQOEhaeGNPanZmRHNp?= =?utf-8?B?WWQxb1Q0UWx1Y09tSEJQdGkrOFY0NEZDajNXSkY0WHNTVUZpcDVtTDNzd05l?= =?utf-8?B?MXNqM0syTlcxSk85OGxhZExmVVZUblgzenBVNldRUUU3SncyZEgxME95SHZB?= =?utf-8?B?SzlmYU1XNnBlczREdnJQcTBjaFdBUnkyRE02NXNWMVlhQk81d0diNWJvSnJZ?= =?utf-8?B?L04rcUM2REk0ZFgyWml4V2U3bEtwc2t3ejJIQW1VWUJ0R1FFSjRaWWFuQ3hF?= =?utf-8?B?dDdpVEp5Z3FaS1UxbEVxYmJzeDZYV29FaTdoWkpvUkUzN01oR0NqVDRyS3Nt?= =?utf-8?B?d2ZRQVkvbE5XUFBaczE4eG5JU05VeEUyYWk4NzY5SXp6SHI3MGJTaWpRWGZ5?= =?utf-8?B?Q1h1bmpqZlgvT25Rb292bklxTWZmTTZyMVVhUXlSRklST1lPUnBHSFI5K3Bh?= =?utf-8?B?M29aNzFuQXczMmhCRTAzL3ZSL3lSTDI5OFpiTlBjVEs4Uks2UVprQjhieTFn?= =?utf-8?B?MnoxYzU2Q0syS0VmcHFKaTJhTmZEemZKdFZ0TlBzWHhiNGlDU0lCbi9KbFVz?= =?utf-8?B?Q3d3eXZxRVR0SUNGellwcXFCNTVBZk9VTXMyWXRHYitxMk01Z1FGYklSSE56?= =?utf-8?B?a1VaeW1QTGZwOUkvN1laVVlJNkxlVG5RaWlDMlM1ZXR2RkNZQnZpTnFFTGVR?= =?utf-8?B?clovUUMxMklFc016TU42cGl5WE5LclBRRVlJelJtbDNXQmVNQm5reFEzOTlW?= =?utf-8?B?V3Vpd3owb0NwT0ppS3Q2L3ozZ3cycko4QzdhNllwdVdxWVlNSElOb3dCUWZw?= =?utf-8?B?MXNyeTk4dHlvdDd5ZmZ1dVRaZjN3cUsrRnNGeWZ2dXRCTEpvdnlhbUdTRjZ5?= =?utf-8?B?emk5dlNFbERQc01yN21XSGRJd2huaGxYUHpucHI4b3M4QkFtMCs2a2Z1enM5?= =?utf-8?B?c3ltZzVtR3I5djM4YW95NlpDUzZ3aDBiaXZlTTNkc0lTbGdZRlE4RHkxQ2w3?= =?utf-8?B?U2laQmMyNU1iRytvbkp3aGpTMkpBNVhjcytmUmR5WkNKNEtJY3ZkMTdmU2xV?= =?utf-8?B?d01hS1IwM05LeCtHcW1ZV2dMcS8xMzZTM1lTK0tCdURHRjFpTXVBdEpPN3U5?= =?utf-8?B?V3dFM0U1Q0ZrZVhyb21aZVlzVTgvSFc4d2Y2aDhDeitCT0RVdTBqV3dzaFdM?= =?utf-8?B?SVVsalBnZ3Rhb215RFMxNDZ3a0t2dEZrZVg3Vk5EY0V4ZXE5MEtseWJPSFZn?= =?utf-8?B?TzFZZzlUVTJVUEdhWGdUVlR6NEVBd3BiWGEvUjFvNktOR2hwSk5nKzVTNmRr?= =?utf-8?B?Tk9QZ1BUU28wTis1UUNYeERJYklldVdFdVhlT0RPMFM1SFlYeUVxMEdDemRp?= =?utf-8?B?ZW02SkZSSVdlWFMyb3hsUlEvdGxhR1BIdlhpUExUejc1ejlOMVl4ZVlIMjdw?= =?utf-8?B?L3RpTGFacllPNHJJSDZYUXpmYXpUcFBxRDhnRnF3ZnpJZjhaY0EyVW1teUY5?= =?utf-8?B?RWVLVlNpeUtlYldmeUdzZnJLMzZiTjhrUGlvUEd2YmY3SHUyUWZCOUFSaUp1?= =?utf-8?B?MWZwNEtaSGdTbHl4bWkvK2JBb3o3Q0ZKV0JxQzI0N21ienRjMnFsbDB5YUtn?= =?utf-8?B?a05zWmFiOEswQTRoT3UyNDVoalVNaFlRd3IySW1HbVk4a3pPa3RhM2FsaHBi?= =?utf-8?B?TXlySWZNZHFMQllPTDd4b1VKajA0bkFYaUEzYmliTjBKMVBwQlk2eUdKcExC?= =?utf-8?B?NEE9PQ==?= X-OriginatorOrg: fb.com X-MS-Exchange-CrossTenant-Network-Message-Id: 38a1b64b-a2a1-4541-5041-08da66be9be4 X-MS-Exchange-CrossTenant-AuthSource: SN6PR1501MB2064.namprd15.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jul 2022 00:03:27.3628 (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: zytoKnwQm2bo4Z/a8PQeYij7x46XTxdM8M6NXl2c3qA5eU+HSEgiTkJ2MaDt6Ht9 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR15MB3448 X-Proofpoint-GUID: ZGrSHWwx4ttG7yDUzq9c8mE11eNY0Opu X-Proofpoint-ORIG-GUID: ZGrSHWwx4ttG7yDUzq9c8mE11eNY0Opu X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-07-15_15,2022-07-15_01,2022-06-22_01 X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/12/22 7:58 AM, Benjamin Tissoires wrote: > The purpose of this clear is to prevent meta->raw_mode to be evaluated > at true, but this also prevents to forward any other data to the other > callees. > > Only switch back raw_mode to false so we don't entirely clear meta. > > Signed-off-by: Benjamin Tissoires Acked-by: Yonghong Song