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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06C25D0BB56 for ; Fri, 25 Oct 2024 15:35:10 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 947C36B008C; Fri, 25 Oct 2024 11:35:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8F7BE6B009E; Fri, 25 Oct 2024 11:35:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 74A0C6B009F; Fri, 25 Oct 2024 11:35:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 56E276B008C for ; Fri, 25 Oct 2024 11:35:09 -0400 (EDT) Received: from smtpin29.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 39CAF120C81 for ; Fri, 25 Oct 2024 15:34:51 +0000 (UTC) X-FDA: 82712522928.29.BC848E3 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by imf02.hostedemail.com (Postfix) with ESMTP id E5BA880009 for ; Fri, 25 Oct 2024 15:34:27 +0000 (UTC) Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-11-20 header.b=jjMHeqyR; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b="gv/Yr5UX"; dmarc=pass (policy=reject) header.from=oracle.com; spf=pass (imf02.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1729870453; a=rsa-sha256; cv=pass; b=koFUCkv3GflkDyeMoRMm666V2Txm0BPpHLot97vA+KGZl0kxZ+5km9pFUElKI8nTrQm+V2 /XthqKjTpjgaSNOwN3ZP6CjMmyaIVYlk3TsbrY5tQ5gfcF4LAmjdzDP45KxuCXRTZnyVMS 2fNsKI5l2WVnIDo9MCFHnA0/EEBE1lM= ARC-Authentication-Results: i=2; imf02.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-11-20 header.b=jjMHeqyR; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b="gv/Yr5UX"; dmarc=pass (policy=reject) header.from=oracle.com; spf=pass (imf02.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1729870453; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=7jJVYsdo4Ted76v1hA8V7iU55s8yRFpWIJaKOTchN5I=; b=a6zpcWAE6tuhkGTm8HLAbC6Bfwb3vQpQbOub2U28r8N7DB9eix2Bcv//kX5INvx215183H NlGON0xUvn8iM576GwKODs9No4IEY3sY1hotaTfFjRuKU9vJHky8299ZYQZ00VAMbtrFIx 4E9BlQYJw2bhIMTZ3RFM1s8oOy8FG7w= Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49PEta7d028752; Fri, 25 Oct 2024 15:35:03 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=corp-2023-11-20; bh=7jJVYsdo4Ted76v1hA 8V7iU55s8yRFpWIJaKOTchN5I=; b=jjMHeqyRYBEqSN5pP6mtak04bMPMaUuWBF 5mE1IrgJaW5IJz4HtMkzNJCaUOX1DN5QYIGjEEnMIhkMsWNzi/RLFxCj4qmBlrz9 CgJMhi2ZxaAFb3LKT5dYJ9y786dtP7IaVxzJ/V6aEpOMF9TySCoO/hr+gSi9S5j/ Y3vpt1W2ofSt3Es0BbN94e+HD5j12mRNezu7Y5+LW/FSWTv7QdvUEvI42fWMuODX alpiQydxz4aNi2NWdtoGKsTNZSroGAFC2njK+D93Py4o5xB7qZVYjVQdBLz/Sblp boLQssCUsie+//uEzBwwNbXjmSvGtTdKSkPzu06oFM9JLQsbtdgw== Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.appoci.oracle.com [130.35.100.223]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 42cqv3ma82-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 25 Oct 2024 15:35:02 +0000 (GMT) Received: from pps.filterd (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 49PDx4cs039113; Fri, 25 Oct 2024 15:35:02 GMT Received: from nam10-dm6-obe.outbound.protection.outlook.com (mail-dm6nam10lp2045.outbound.protection.outlook.com [104.47.58.45]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 42emh5vscv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 25 Oct 2024 15:35:02 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=I6Qbp7s++Lta+jUNwPHcuhTOGi/gDHh9DuCGTYQ3E7RJjvX68GP5iz7hw9e2EYqvzd7jw2Yt6wr0UQzcU4KpuVaFoQBJdOJOuBRXJn5YDB7H95ArLHLoof9ouriV6iHXhxyI0LagcKp22gYoFK5Lh7dv9iV4CMUX7gtE73RWO2ALKakH9vkQ5qUC7zS9Upwvr520bZCg3w8UvoUrFjK1A2vE/DgIjWmedbpH58c2TETsNshBzIDyEd2V9OqBAChFMMl6g0c47EORF2A6I+IEO14OlHsPQysTzQNJV8kAqWziYkDyyJjo+0O3qcaXU7L5K+ALFGHYzelBXwAvr9Eh9Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=7jJVYsdo4Ted76v1hA8V7iU55s8yRFpWIJaKOTchN5I=; b=HfkVXU43FvEp4S7Fbj8vvLIvD7Wi4lmVkRX2hKuM6OG88ar39PjNBe3OBWbwYt280TC2DkIEBWB/1qU4aIJOsAKZAODQJEzCMKl9YsjNrWnRjppUI9QuEWlgkbN9rbaQjNFfU/ikOQC5xHtL37ovk3beE3rpPt2gEqxJubcse3AY7er+P2da67ihwPl9xcbDYyijNgOvpNFdJZhjUb8dj5hsE5m/kr9MSwbUK1EA+Mgqh5gFRb+m/E2f7RSClJGjHs9+e2y4ZJrjanUzitDvPq9ArB0EbI+YfJ4v8g0kHMWTaagUB0BDxS6XYU6Us570MgCWf4KQ9YLu+heTc25txA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=7jJVYsdo4Ted76v1hA8V7iU55s8yRFpWIJaKOTchN5I=; b=gv/Yr5UX2/SQwNWTKQ8pHEn4G/aqeqWy62YVnMop3G0md0nSTs1lto44XLh8bF2SRPpXJbYd2bWqHrIYLGRSjk6ZQbXhChXIhisiGdCMBx6Sh0X7BwLhs4W+l0O7deMTDe5Z7nlNaHtUQRmspe9CYiDfsjmLNFAAx7U8dnZuK10= Received: from BYAPR10MB3366.namprd10.prod.outlook.com (2603:10b6:a03:14f::25) by CO6PR10MB5619.namprd10.prod.outlook.com (2603:10b6:303:14a::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8093.16; Fri, 25 Oct 2024 15:34:57 +0000 Received: from BYAPR10MB3366.namprd10.prod.outlook.com ([fe80::baf2:dff1:d471:1c9]) by BYAPR10MB3366.namprd10.prod.outlook.com ([fe80::baf2:dff1:d471:1c9%6]) with mapi id 15.20.8093.014; Fri, 25 Oct 2024 15:34:57 +0000 Date: Fri, 25 Oct 2024 16:34:52 +0100 From: Lorenzo Stoakes To: Alan Stern Cc: syzbot , Liam.Howlett@oracle.com, akpm@linux-foundation.org, jannh@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, Greg Kroah-Hartman Subject: Re: [syzbot] [mm?] INFO: rcu detected stall in vms_complete_munmap_vmas Message-ID: <1a171810-20ec-40ec-ba08-88d068243cda@lucifer.local> References: <671b7fb2.050a0220.2e773.0000.GAE@google.com> <832afb0c-98b7-4d29-8436-1ff6a65133b8@lucifer.local> <967f3aa0-447a-4121-b80b-299c926a33f5@rowland.harvard.edu> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <967f3aa0-447a-4121-b80b-299c926a33f5@rowland.harvard.edu> X-ClientProxiedBy: LO4P123CA0089.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:190::22) To BYAPR10MB3366.namprd10.prod.outlook.com (2603:10b6:a03:14f::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR10MB3366:EE_|CO6PR10MB5619:EE_ X-MS-Office365-Filtering-Correlation-Id: 1802775b-4d7e-401c-8462-08dcf50a9449 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|7416014|376014|1800799024|10070799003; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?lgKpfbA6tK8Z4t/2x9WP0QCpDlLayReK1VdCW+zWYJ2cvoriADMTj9IhouBA?= =?us-ascii?Q?kIINOlB3sA0GLyiQ3BhagdvXhrv9Rg22lBC0GAbd7ij9hqgrLU97gbxxzriJ?= =?us-ascii?Q?CIpl1N7t3vlrKVmgH2N4cYK+wX4umZcT4yv564YeIJs0yGz5tJFMTaOJhSqP?= =?us-ascii?Q?WASyhmQr1RTX5HiYcgpKOplrV1Qu6TjHq73zJ9CwefLPJFLrmJwz26mYWdBj?= =?us-ascii?Q?Xfyl8Z2B4aEIAy4CQey+a6wA1NzU5xXcmBzJ3475kIRyomR95bV16Wlp15LI?= =?us-ascii?Q?4a9vqCouUuXPQ+Yy0Wr4gvrihSWL27A2pbj3wXE+dUd7cQFHUS9pAgDQgS62?= =?us-ascii?Q?v+GlOoB5MZAKX8CkFvM/ltSSTJ3JGK9Jp9Gps37cIcg9drVOl+rqMtPudxH1?= =?us-ascii?Q?poBCAxfDh2j1V7t2/iIlLYHsVVlqg6v5Yt4V05+cvyy3AjIHJFUxghm9++HM?= =?us-ascii?Q?rl4G+p+kJB5a1Pet3s9GglfwFhPIjJDsMFr0PN0sCk86dXEVKOjJcYyee2La?= =?us-ascii?Q?rPZiuYkmh6PlLaSGMDDy8/t01fJROGxZhl4WgZyUnh7ZABf795j7LI8gugPy?= =?us-ascii?Q?ChGh+lAYdHPtE12CLbl2VlGd66Avk42KMCJLaCPLgncmuqCYWmoscxgt4b4g?= =?us-ascii?Q?woKeLLBEfyltNBknoiqnnMVn0TQN4oTwiGbtSOUC4npsqAtN/rg2XKMwAeqP?= =?us-ascii?Q?sYUTS5XzOEGSYIGGNh/Dth/W/1CBLXQqZtmd3NbkZcUTNf+9PPaDHa3SgCkO?= =?us-ascii?Q?wP2BKbqJ0B6Ha76aUOLcIWixXnog04H0C/4+4eIZ9VPujr9A82ISl6I+jh8S?= =?us-ascii?Q?J+lBJytP3OA3N8VfbSoCwtiVDC9hA9OmI6lmqOeKgcEUXLojFtGYHq4RoG14?= =?us-ascii?Q?bALwqI/2v6QMVLdb2AEBohcPPEMhCwoKrwDF6kSjBgGPvtv0IlEzI+LU6ltQ?= =?us-ascii?Q?2YjL6vruKscMgWbWlJYGnDUO0M+3R69ZSj1T9bC5yS1wwRcdK/yW0kyv3V+k?= =?us-ascii?Q?ofwsmWtvW0jWVAUnC7LK+c46XasB3DlQh0lVSCtJWgKUw7GbvuxeR4E51uKE?= =?us-ascii?Q?YydTW9l5kL7wfk9rjpLKLw8YoMyyq/uFvMZex8UBSrv8sMTTx6xT033GpI7S?= =?us-ascii?Q?pc6IYm15aFYejjk7X3l17QjEKDFX6UiOBP3iXROWmmMqtVxuy9k3muRceglE?= =?us-ascii?Q?DLXD0mPLw23Ei/7GlCrGpsPBHzcDlbUijjGh14awjUm6Dna/gbSb/SDmBMbS?= =?us-ascii?Q?hutl73tLIKPUDvZSas2iWFGNmF1jVyxTtolRLOpf8Q=3D=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BYAPR10MB3366.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(7416014)(376014)(1800799024)(10070799003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?107i+9ZVnHNi4zwG4XLcH4JijT+R0q53E9K+nLf0USm/gADrgAc+TIWgJ4xB?= =?us-ascii?Q?uZDOPkargc6CO+p9bobPOKEt9LCUeQlhq0We7iJJThyi8xSqbF3h8HDBwo2M?= =?us-ascii?Q?gAXfGSyQ0hWGSZ0TdbQiNKySi0IT4fQFiJDmjhkvSNxj8u+A7fLt5GsrV8QR?= =?us-ascii?Q?5r2yAB4wKspDfIVMTe7hLAezOt6D+Zmd7ZVbDt34qVQ7I5YsPHFJimqA+J5e?= =?us-ascii?Q?aWEIrOVzPUfokELbM/52su77frCNkdS3L3R89SwvtPRGOJwCDNOFt9L13/e4?= =?us-ascii?Q?nzpvQ2twYcRqumB7ZhvHNufx3zJFCgQ3c97rcYe01zFt9XekgTdAsZ0MN7Ay?= =?us-ascii?Q?CClqLDIGJn+jT4VuHR0qRtRD/4Zc3ypOiMvaBvJcweWBtVFMVaqDswnoBWhr?= =?us-ascii?Q?SHQwF5nY2/Lcb145g59yGllzGKqwpqUJKVP7+r4gsqP/BtvUJuZMo0lt1OsJ?= =?us-ascii?Q?Eat1VqlecqrXWwpah/j23E0xNCTaGE6w5sE5x3TOM5oM0bxvnrR3uH0O7Xxb?= =?us-ascii?Q?M+rLyI9lDL+aPrx8W4xWfyAF5dFt9ocVORPfDJeMV76r6nqN7bQMHVcrYSuz?= =?us-ascii?Q?//t3nweFIQHkKgTXf9v7+/5mY3rkaE/kqB/hHqu84Jhb2s6wgSe/P+sNuBzS?= =?us-ascii?Q?mOXWex4HUBkfih2D7Lh7xLdYaM3lwQx6H5gNvnPqursrW++7I2JxGK4r95v/?= =?us-ascii?Q?kyKvhg5QScmNg6GURdlp9YjzJal/yJB3jAV2D1u3YrrI9A4U1ypbr9xCZSO5?= =?us-ascii?Q?2OGdnVlWdd9Qpmr29cQjBMVA8cJ5JN2+1LNep9E+jWXTGdxSgA6T4YTHdZ98?= =?us-ascii?Q?mFCR0C+LXd+ITd6MWxjlJxiMMPbw9dOS7LaWpclUSqVkZGwsvnu/afjX1tX/?= =?us-ascii?Q?/eWoxgZ1A7XbMeM12i4KKzdmE9qcecZ2J+DbZHQrBzSkkMNn6WddmvManL/x?= =?us-ascii?Q?hfxGb7QjSj51//BMHV3zjUeaCfsSKuuL5GSypSaD8oPuMMwPzhsCFuhNF7Qe?= =?us-ascii?Q?O7nKrDLY/Hq8Dq5zPfyoLk7ldCZfl17/DcPDB4nzurGvjj9xFLW8XCo9uhnQ?= =?us-ascii?Q?WhB0EgArxDvOYJWX1Cph+41GJr2htnc9cxnjaVKT/WlC2OGhswur244HNzFH?= =?us-ascii?Q?s1mtQA6X7x6Q3++kHRWIdvmIiqZekHykwlD9d4qgBRu/jni+Qlk0t3Sm/DO8?= =?us-ascii?Q?T3/gWi4AErWd1N/8NEvgK2crFoJcs6iOfOwZ+SUSWfL2qJ/Q20+x0geQVf3S?= =?us-ascii?Q?Ao3g7r7T2yaarMBdlRJkMrff1M454MhoTMI4/xKaQGjxYzIQFf1EbKSCDFKh?= =?us-ascii?Q?acSSPR1WiNSX8V+3EYiyPE5OSYFeizqb9LIK0guMigQmiwDwLtC3uSRs408c?= =?us-ascii?Q?6xjj2v/bonTayXs34IyDAxRgNAhcUmC5KVSEeJAVZOhaGIXa2dqlvKgF5gLh?= =?us-ascii?Q?2Nlj+23wlXnBBuvNFBTSK9HYOZRFCxgS1cFlQyldL91sAxTlosCpyfJGThqk?= =?us-ascii?Q?DJY5MfNmiw7+JbfzdQmvOIOc331SKL0sPCNUEWW40NJwMDxHF83LiaU+hZy8?= =?us-ascii?Q?pBBv2Eyt2z1KF8hx42XEOBsn9J/QgaN33YqYsqbMa9S779ZJP2C/FieBhD32?= =?us-ascii?Q?FrEPKAt2aetGmD/Jzi3uXscRqTxdZTtkLTWuDZsEl6KVNZnVZG+UbnumgyfT?= =?us-ascii?Q?PbrB4g=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1802775b-4d7e-401c-8462-08dcf50a9449 X-MS-Exchange-CrossTenant-AuthSource: BYAPR10MB3366.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Oct 2024 15:34:56.9759 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: ns9v3Ngpv4ilDjQWc9Nos1iISe/aZ0lgi6oISlHTo0MZGMaunIP/uAZVydPaZL/fkhhdr5lrZ+RVQdYRzNIOx2ivAL5toOQJFvXpmTliMqo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO6PR10MB5619 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-25_14,2024-10-25_02,2024-09-30_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 phishscore=0 malwarescore=0 adultscore=0 mlxscore=0 mlxlogscore=999 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2409260000 definitions=main-2410250121 X-Proofpoint-ORIG-GUID: fBYHDbQBLzFJNK-BMfoFVnnoSA0_GJ4H X-Proofpoint-GUID: fBYHDbQBLzFJNK-BMfoFVnnoSA0_GJ4H X-Rspam-User: X-Rspamd-Queue-Id: E5BA880009 X-Rspamd-Server: rspam01 X-Stat-Signature: n1geri1fyc8m3iudbb3ceb15is3h35j3 X-HE-Tag: 1729870467-439135 X-HE-Meta: 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 Iu54AhrL 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 TMulibcA QPcjphMqgdXtknwiAl8rTA7keNN+NTUi95AzOlrEOi8AwTpK2uLxveHafZrpZnaxkqgi1ydlXKpDOkfPPBgboLlQnHs3rIT9 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Oct 25, 2024 at 11:13:33AM -0400, Alan Stern wrote: > On Fri, Oct 25, 2024 at 12:37:36PM +0100, Lorenzo Stoakes wrote: > > On Fri, Oct 25, 2024 at 04:23:30AM -0700, syzbot wrote: > > > Hello, > > > > > > syzbot found the following issue on: > > > > > > HEAD commit: c6d9e43954bf Merge 6.12-rc4 into usb-next > > > git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing > > > console output: https://syzkaller.appspot.com/x/log.txt?x=139f225f980000 > > > kernel config: https://syzkaller.appspot.com/x/.config?x=4a2bb21f91d75c65 > > > dashboard link: https://syzkaller.appspot.com/bug?extid=0ca979b86eaec7337a89 > > > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=179f225f980000 > > > > > > Downloadable assets: > > > disk image: https://storage.googleapis.com/syzbot-assets/3bf4a453ec2f/disk-c6d9e439.raw.xz > > > vmlinux: https://storage.googleapis.com/syzbot-assets/e4a2db2a5d95/vmlinux-c6d9e439.xz > > > kernel image: https://storage.googleapis.com/syzbot-assets/8eb8e481b288/bzImage-c6d9e439.xz > > > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > > Reported-by: syzbot+0ca979b86eaec7337a89@syzkaller.appspotmail.com > > > > > > > Isn't this just the same thing as [0]? > > > > Again I think we're just happening to hit a stall in the unmap logic rather than > > this being an mm thing. > > > > We retried that one a few times and it didn't hit any mm code after the > > first time. > > > > Greg mentioned there was some weirdness with the dummy usb hcd controller > > in [1]. > > For what it's worth, that weirdness has been fixed in 6.12-rc4 by commit > 5189df7b8088 ("USB: gadget: dummy-hcd: Fix "task hung" problem"). Hm, but this is pointing at a commit that should have that? Strange. I do wonder if the fact CONFIG_DEBUG_VM_MAPLE_TREE is enabled (and by the way in the mm- stack cited) is a factor here, because that is a very very significant slowdown anyway. And I wonder whether it might be a good idea for syzbot to not set that flag when doing known-time-consuming things, or at least should up the RCU stall limits? > > Alan Stern