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 936B1D767E9 for ; Thu, 31 Oct 2024 16:58:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0CB616B0083; Thu, 31 Oct 2024 12:58:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 07B546B0085; Thu, 31 Oct 2024 12:58:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E10386B0088; Thu, 31 Oct 2024 12:58:46 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id C6B326B0083 for ; Thu, 31 Oct 2024 12:58:46 -0400 (EDT) Received: from smtpin21.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 54358AD6F3 for ; Thu, 31 Oct 2024 16:58:46 +0000 (UTC) X-FDA: 82734505770.21.95918AC Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by imf20.hostedemail.com (Postfix) with ESMTP id 2FAA41C002A for ; Thu, 31 Oct 2024 16:58:08 +0000 (UTC) Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-11-20 header.b=bVnnB9CM; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=nLA5xlJr; spf=pass (imf20.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1"); dmarc=pass (policy=reject) header.from=oracle.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1730393763; 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=5MMUBZaXktnyDNnKXeBDyGi98EWqEJ4sytIvX6+Z/mI=; b=cfNrEkMBMlBoh7z9wN9Q2eNkTisYB1YPgM6qaq1KmMQ8zJp0AGF+51o8+SbuV2Zb2p8dKt 4R/M1fCl02j6Ut/e/g4BDMyuY7qd1eh3EKn5WA5vF4JpFqpM3jrqEfJCtj/VdC8nqGIM/X jHPkB/T3PnaQ0WcZr55bnII7el/gpfk= ARC-Authentication-Results: i=2; imf20.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-11-20 header.b=bVnnB9CM; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=nLA5xlJr; spf=pass (imf20.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1"); dmarc=pass (policy=reject) header.from=oracle.com ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1730393763; a=rsa-sha256; cv=pass; b=S96PFF51/7hXKNmvvusjCy4jhp21Tg+P+sn1FWIjbqDzGrpuiqzdBhxQDlp52N3sxOZ9kp T/Ii8n4Hrr5vLT6l7AgAUoG05dLVAda2Ehn3AAyOOWJz9d0THCi6Gl3sYIdd9DJF/iVerd /QM96nD6KQ/b/EN62zvg1fHfKy7SD7M= Received: from pps.filterd (m0246627.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49VGtraF014200; Thu, 31 Oct 2024 16:58:38 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=5MMUBZaXktnyDNnKXe BDyGi98EWqEJ4sytIvX6+Z/mI=; b=bVnnB9CMjexuwdIhEoROFxvoXftjhjy5uw Df3ETNeplnwvzSzv02498IeneuETHYfw+RlJIex7pMbz4jisVw4zSF9n+Zy/kvQc 24JIZI4yAlakJEwWjuvWujOsf1JCt69yNV/6bz5JmsiIoI1OFufXYO35ZQk+jnFy hx1D7pO2P+It8YpqZJdnUqbTj2jbQ5pa6WcS+kc/nklJ1fMJzhsgxjAzd+ryDsmv AZq/cGKhij0l/HSF74yUAbJQXW0k23nx+qTnfJaR0wPXfn//3mmMiA8sSnnUPuQK PnwC3xYDVbmEFHcltu3eSaxh1lAfRQNGF/9fsCmK/iqI2SWkGExQ== Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.appoci.oracle.com [138.1.37.129]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 42grc92rst-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 31 Oct 2024 16:58:37 +0000 (GMT) Received: from pps.filterd (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 49VFY7eE004982; Thu, 31 Oct 2024 16:58:37 GMT Received: from nam12-bn8-obe.outbound.protection.outlook.com (mail-bn8nam12lp2168.outbound.protection.outlook.com [104.47.55.168]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 42jb2x65y4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 31 Oct 2024 16:58:37 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=KwA2Y46ZhjBXBYYiP/SvAuh0cWLj0E8TUOUybJt2135qOUaMfQ5S/jkw9UXv6SJ3u35k8YU8E24aO2GveXLgK3mIDgioK3j3rmMK59M9YLsiKmk68cpVY3lb91Zly97Na6XwuSrkS90SdUexO0LRXyUUIa951ueUjRm8iFyLxKvJISiQt5/vLWsrgul72qHxkZzZIblEjLxRyNtNe8Mg/UwANSo7QpSvuJ+LGWoPqXsGxCF4NlWLftr+YyHxez2KEP/uzUWrPWiW6lAX7vWltbFU84r4iOKwATYYqwNPeRA2t4qnqB4gMH2Mz7P/b/XQ56HWei72yOb6EXayfTvwcg== 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=5MMUBZaXktnyDNnKXeBDyGi98EWqEJ4sytIvX6+Z/mI=; b=Y0AyQlzp68NiyXUEtkgVdelcqdOfQDh/DxXVxP2UPrjLWonwGDy8ZZwnL5tbUSK1PppIDLLvRAjHCfpaoV8tRggKTe5fv+G6W2nH/izgB6403SKmv8bOA3dYP6oUjRZ28t608FpQwdDVV4NVNkralTSczCty9GHYwafir/2AKTkaquZLEuZOzTEMTtTdzwpB+E+LceO3VlrxEcg01lDTUZzDau47rfjdVfGdVKtT16NmoRsJg9FT6Tb04MHORM16NXp5xnRJUoA7Pf9zIxC2DRpzu2gL3J10BX3BIQBBSvELOyNJB03M1accGy5/utpINNd+XiUd+3Naouamm0kc8Q== 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=5MMUBZaXktnyDNnKXeBDyGi98EWqEJ4sytIvX6+Z/mI=; b=nLA5xlJraUG2xaBlrXXegaxnQK6cRFNuD+ZpUw/YZEXxeGmZrTNw6+YPVUe7f/aOSLH09oIwt9NaKoHgl/m+csTP40OmLl7J0WgbejoaZgoADxKzagxF9VJSLIgvlKSUwltn5+bHhRAcsuJWXANTHHqnm5xqnufERMp7DoAQ/yc= Received: from BYAPR10MB3366.namprd10.prod.outlook.com (2603:10b6:a03:14f::25) by DS0PR10MB6102.namprd10.prod.outlook.com (2603:10b6:8:c9::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8114.20; Thu, 31 Oct 2024 16:58:33 +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 15.20.8114.020; Thu, 31 Oct 2024 16:58:32 +0000 Date: Thu, 31 Oct 2024 16:58:29 +0000 From: Lorenzo Stoakes To: syzbot Cc: akpm@linux-foundation.org, jannh@google.com, liam.howlett@oracle.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, Alan Stern Subject: Re: [syzbot] [mm?] [input?] [usb?] INFO: rcu detected stall in brk (2) Message-ID: <2928b6e8-3928-411d-82b8-6b17be266deb@lucifer.local> References: <6723b31e.050a0220.35b515.0165.GAE@google.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6723b31e.050a0220.35b515.0165.GAE@google.com> X-ClientProxiedBy: LO4P123CA0658.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:316::7) To BYAPR10MB3366.namprd10.prod.outlook.com (2603:10b6:a03:14f::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR10MB3366:EE_|DS0PR10MB6102:EE_ X-MS-Office365-Filtering-Correlation-Id: 44bb9bd5-e812-4bd6-781a-08dcf9cd403d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|7416014|366016; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?ekok0tlQB7cQtSuuu2hTe9HRPDNahHXL7pPYcd89AcBSGAfF9F+OlLr22x+R?= =?us-ascii?Q?9ZHFgLXc64jnfcYxfzoxBaHmXwXIBShLCcvUTiqdrl/GpbMskIMHU77X/rbK?= =?us-ascii?Q?Jc1lBD/6P7UmA3u9xq2bL48hD3sQFNy5s4eatmiwTG7PDDgRi/y4F5oG17E9?= =?us-ascii?Q?NvwpNpKkiTxnPVJ6W+CFvBiUAJepSBRVwToROD6W97HXVH3dx1jC0wNKMVLI?= =?us-ascii?Q?CDQMOqaPHV3REua6yxaPf3Zn4I5Wp1d7HW5cgsV//2X7fxs6cw79IlZMQhWk?= =?us-ascii?Q?L9kprHql/l6yf0w1MRFQ1Kcrvgmx2SHCi7QKoEcXGcgtxi8S+bSrZW4kNR5r?= =?us-ascii?Q?2+5XBMGDrwlC3bmy+PfqF2hmeEpUKgtobrFxbrDYIcReYqQkAh2Vhqb9spZV?= =?us-ascii?Q?GTmLqUztUoUVgUtOnl07goFtZSjaeRAgIkEK53vvP+TCAZCV1Wa3ML6QdUIO?= =?us-ascii?Q?90Qevzzt6PzfXQEO/iPDQCrIDgZQKL+6LBQ1PM9akLp/K5OvEuMKaqVj44AM?= =?us-ascii?Q?YUPNeprB20k09KKgB4SmihT08jk6NtIkF/44vBqiyJK39EUo+CFsGRIPfzmQ?= =?us-ascii?Q?snWpLuQvP+hbxXjEb5Pc53h4YJ+eea1mV6cgmt3JR4kM8wj11hARsdPtcHS1?= =?us-ascii?Q?IM1RNb09WUmGFx9JKCjfXgL3EfcG7fEkOb3oY4klKuH2iJ/fZKEiscV13/bS?= =?us-ascii?Q?nZkd31qE2ty/TjsoXWo/Ick3ycbDyS9jgtVmyYg+z8TWPR4Z7ucClAl2tPTd?= =?us-ascii?Q?Mhui6cfH3DTuJmQ3UalII1vlvo7U1v1I15Q0L4gyq3l4n62Y77NHU5yhu+Ts?= =?us-ascii?Q?vZvJqrbaVTAwTrLSEEv9vPzwndiSKn4zFWTwmuTAQVXX4YPMjqsqUstDDSoR?= =?us-ascii?Q?hfGKcbHLToJPZBd/QZvBmr4hZv9XlxH9o0KigG78f+4FtiaYH17B1Y9mjZhc?= =?us-ascii?Q?R17+xskwCTgQJ/510inUzswi9ACqGsf4j0H126M5AwI1vGZls3xndBVVMqKe?= =?us-ascii?Q?fBI2cGJVkG8gVWXbr1WeTzvHx1hBhGC0YGCdNMZDq4FwjdWsHpWoYfkaJp1+?= =?us-ascii?Q?Fr3Ww0RqPvr5jbOq4Ee4dxDZh3Pi8DIvZG6A2t8kCanT+IVIVae2JzkA4/0k?= =?us-ascii?Q?d8W7IO5jvZ8HfjwluN4KwtDferEtqZN0x7gUzriKuGf23X9Y1TVcp2B1eMVX?= =?us-ascii?Q?p9PElJEJ/Amu9HR85OhAISn/W5jCW/GEWsqhMYZ+mGLlUyDgJXuJz8ySxshK?= =?us-ascii?Q?+64QFnaNyGDeuMWu+3UX9tdbW/VYxuar+Sg3rf3UGg=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)(1800799024)(376014)(7416014)(366016);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?Pm/xlQbpnuFuIUzLMuIyOy32wRQIb+zjDAXD4BATOfo0tn2hEqqKmL5/Zcvs?= =?us-ascii?Q?DNOQUZWXO+EhA78B9+f5t+WAn4p9sC/DC79cyvdxYMlxQxR3e5MFv0cZr/oO?= =?us-ascii?Q?uRovh5WLdXgiAnZxIQWucT/CHnVlvbudtkC6MKVl0E7T+rd4p0DXbZRFBJDI?= =?us-ascii?Q?Bmm36FPisamWjL9Lb8vFk+GRnz0bMoBMjHZn9rQt8s2WgA1/3VWVWqM68nOw?= =?us-ascii?Q?Haxa05dnsNgL2o9RkwnKOxY2DVWMXaZ9M9DdieD+a+aR8OvpkURv8LvallNJ?= =?us-ascii?Q?egHEGNaOZ5JbxQ99zgWJ19aofjLHhntLxGfgzZHxXUn1rs09ssPkKCD7azpP?= =?us-ascii?Q?NSv2ciIH+l48fLkmWPR9vf38XyWlTTw0Jwmi0PUpgtT9Hx/1NgvpRg7OkKlr?= =?us-ascii?Q?wXB0C6t46uO3bar1dAwijCSiZJusV7hYLQDq28SJOeRNcSUO97sdZ056XOLQ?= =?us-ascii?Q?6FdQRkWMUokpYkflFQLMIUNc4f7/OHiy8ouxvMoUiX/MS2IBWzHE/Ml3Qowf?= =?us-ascii?Q?v1s81cZBh8D4Wv81HFyT3A7PI2IIuSOecIMkjFGuIBrS8vz0RFYb+asuoLx4?= =?us-ascii?Q?yrjAJbVxHJDHQMufWDUPrftD3txu8Ez0I0iMSTTP7RdzzL9iLTQMYUdQeV+3?= =?us-ascii?Q?a/Rz92Dn4WXI6jESE7flqOK3ZEYFx1tT5D2zXLjIIjFKDsyvzNinldyKBNMt?= =?us-ascii?Q?uRotdoec5aRUh9EiWWGKiKYnhJKrZkLiRZOKN4oeQoh1Nb+tvixrLvPE++MV?= =?us-ascii?Q?N0jYEwEy056BCIGDlIEoOXyBlz0X5HZCWwjVXFhCe1rbOnRW97eyzWkOARNc?= =?us-ascii?Q?npZ97M2zRzYjffd2uTt3fL1Kt5x81vhNo5duEgKPcxqcAR1acG1FmT9r+euF?= =?us-ascii?Q?7dbU3chCqeULFbHoLvAMPbe71PrTLiGu148leCTKrvbKfwKIvwvRFTStDLCE?= =?us-ascii?Q?qaz2lk3iAMXJ+12d8vjcxqqCVRPDQh7ZRAU6nKpF40xVujIYGMSBksY0lmsi?= =?us-ascii?Q?1eEyDboLlYfrw2wgQV7/kumKXrh/D7hOA3pn/sk7FCtn6U1RDRTv/On9XwCN?= =?us-ascii?Q?JWnpeoGGtp+kb5PzVr384JWYmU+77H0+3m26EivaMFPYa9WWl7Y/vvQpAzfy?= =?us-ascii?Q?P9IaF34Gl6AJHiwjdB3ZE+CJ9fLtQfkSnKAa/3bgiQ4trCTcWM8AKCff7Sin?= =?us-ascii?Q?cW47R0pw8mIA4GfHaAY/8HzCde5EjP8ygO++mBJoItoT5tgBGFSDCXYHc/Fa?= =?us-ascii?Q?1ARqPC/s91/laM7btPqIiXefYhRyHqZyGHQ8W2WTwWVWFer3qIJYpaLLK/y8?= =?us-ascii?Q?z8CaqhMHq+PlYNXKcrLg3LfuVOMUgiQWZ1Iq9axQ8PtTqlhIp8w6Sd5XkoVT?= =?us-ascii?Q?aHutIzp5lCF7ICBdEjydonkjxhuRuswumKwQe6DJyXA/6mo48Mp6GwttoPgP?= =?us-ascii?Q?mKi381unUS3JudE8dSoCxwLWnv0RhhN2txLAiWkaku297Tpq5XY8H0nx6wa+?= =?us-ascii?Q?MPoKknGsNNppxTdtDHv9JNBTrphei/lg0dGmFCZWlys81rq1ANV63ZhIXGsZ?= =?us-ascii?Q?KZMtGcFbDPOuynNUldn3WlGNY7FNcbZMbvkhYrsd9o168chIteYgNxsTg5A/?= =?us-ascii?Q?iA=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: 44bb9bd5-e812-4bd6-781a-08dcf9cd403d X-MS-Exchange-CrossTenant-AuthSource: BYAPR10MB3366.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Oct 2024 16:58:32.2074 (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: BkGwBRxEqcCl6O5x4gC4pRijl5MvxsEM7jL3QeUwUwX7QgTBedvMYF2Xiatv79GTco0J7BK5N1S/bVYEPrE5OEK0FooLS3kCyWaSDUMSmdI= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR10MB6102 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=2024-10-31_08,2024-10-30_01,2024-09-30_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 bulkscore=0 adultscore=0 phishscore=0 malwarescore=0 mlxlogscore=999 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2409260000 definitions=main-2410310128 X-Proofpoint-GUID: aV4xCkUrmyi7n7FuCxZLfvIJP9EGHKK0 X-Proofpoint-ORIG-GUID: aV4xCkUrmyi7n7FuCxZLfvIJP9EGHKK0 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 2FAA41C002A X-Stat-Signature: 1fss1h3hi6grrmpyzyje1wg3n81aotxp X-Rspam-User: X-HE-Tag: 1730393888-760621 X-HE-Meta: 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 ViPT3YLM 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 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: +Alan re: USB stalls On Thu, Oct 31, 2024 at 09:41:02AM -0700, syzbot wrote: > Hello, > > syzbot has tested the proposed patch and the reproducer did not trigger any issue: > > Reported-by: syzbot+7402e6c8042635c93ead@syzkaller.appspotmail.com > Tested-by: syzbot+7402e6c8042635c93ead@syzkaller.appspotmail.com > > Tested on: > > commit: cffcc47b mm/mlock: set the correct prev on failure > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/ mm-hotfixes-unstable > console output: https://syzkaller.appspot.com/x/log.txt?x=1304a630580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=6648774f7c39d413 > dashboard link: https://syzkaller.appspot.com/bug?extid=7402e6c8042635c93ead > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > > Note: no patches were applied. > Note: testing is done by a robot and is best-effort only. OK this seems likely to be intermittant (and unrelated to what's in mm-unstable-fixes honestly) and does make me wonder if the fix referenced in [0] really has sorted things out? Or whether it has perhaps help mitigate the issue but not sufficiently in conjunction with debug things that slow things down. Because we keep getting these reports, that mysteriously don't occur if we re-run (or hit other code paths), they seem to hit somewhat arbitrary parts of mm, and because CONFIG_DEBUG_VM_MAPLE_TREE is set we spend a _long_ time in mm validating trees (this config option is REALLY REALLY heavy-handed). I note we also set CONFIG_KCOV and CONFIG_KCOV_INSTRUMENT_ALL which isn't going to make anything quicker if the USB gets laggy. I'm not sure if there's a human who can help tweak the config for these hardware-centric tests at Google? At least tweaking the RCU stall time anyway? In any case this continues not to look likely to be an actual mm issue as far as I can see. In [0] we were stalled in a validate call which would align with the idea that perhaps we were just dealing with a very very big tree and getting slow down that way. Cheers, Lorenzo [0]:https://lore.kernel.org/all/967f3aa0-447a-4121-b80b-299c926a33f5@rowland.harvard.edu/