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 085D7C25B4F for ; Sun, 12 May 2024 20:41:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 422036B0202; Sun, 12 May 2024 16:41:25 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3D1796B0203; Sun, 12 May 2024 16:41:25 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 24ABA6B0204; Sun, 12 May 2024 16:41:25 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 007296B0202 for ; Sun, 12 May 2024 16:41:24 -0400 (EDT) Received: from smtpin27.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 73A97A16D0 for ; Sun, 12 May 2024 20:41:24 +0000 (UTC) X-FDA: 82110914088.27.5D49069 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by imf27.hostedemail.com (Postfix) with ESMTP id E58264000F for ; Sun, 12 May 2024 20:41:20 +0000 (UTC) Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-11-20 header.b=Q0Ygmhm2; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=nHTP2OVI; arc=pass ("microsoft.com:s=arcselector9901:i=1"); dmarc=pass (policy=quarantine) header.from=oracle.com; spf=pass (imf27.hostedemail.com: domain of liam.howlett@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=liam.howlett@oracle.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1715546481; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=7TBQIGN4/1VyAdMPXB7jBAquEDkreAUqTZ6Nv3CaPiI=; b=AxD+GN28MJioxLfX1o88oxRnSQBWV76Msmhe4wQEGB4Y1j7pWm6JO2Qtcm1kAmniIYa601 65M8L8EwY/Em2hwVPTjb3p1V6PJEzWwNga2wfzUd2ucrvhE6f/MBCuLJtHVM7jH4x7LmFX lsDVv6AGH9Lya+reaHjyuf7MU02unaU= ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1715546481; a=rsa-sha256; cv=pass; b=UP53nhq7WVo9JfLlc1uNy5d0vHa46+P/iAP4p6Wl1QNbr/bOg2iiWM5snicDwH3WZ+J60J sDTc2nG8w9DVoQh4UBUHY7LUfkHBXGEKY84LXEPHZfMnY0Rncm5GBusdZ2OD78aPSEsRyt we/TC24AB0PN6K62CbT/FKF7FhGeHWg= ARC-Authentication-Results: i=2; imf27.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-11-20 header.b=Q0Ygmhm2; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=nHTP2OVI; arc=pass ("microsoft.com:s=arcselector9901:i=1"); dmarc=pass (policy=quarantine) header.from=oracle.com; spf=pass (imf27.hostedemail.com: domain of liam.howlett@oracle.com designates 205.220.165.32 as permitted sender) smtp.mailfrom=liam.howlett@oracle.com Received: from pps.filterd (m0246627.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 44CKOE8P012469; Sun, 12 May 2024 20:41:17 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : subject : message-id : references : content-type : in-reply-to : mime-version; s=corp-2023-11-20; bh=7TBQIGN4/1VyAdMPXB7jBAquEDkreAUqTZ6Nv3CaPiI=; b=Q0Ygmhm2B7nAkPl5hF4NQwwr82VTAF7VtqBO8Ia+z/Tmtjut9NOrOORjQKEPyYI0A51P fubeQVIF0zWLb3f0mbnWTRwEetdMXCwjKst8Cv+TJN1AuAI0j18p0uwnE1qPKCJa500O y6pNilqzLmkCaNcC9a83oxVR3XlrPRhvYzjt3UpalCAa5+nnzJ84ziv5gsmp9d1fsMYB go4weMrlK2BZRha4ZdJd1tFvkd2NgWTxpgZ1eSNxqTz2huJ4OWNFxHzu7p3qvo7bkORm 0RsftTUd6GeIx79kwQo+qXrAq5GYa/i5GRPew6CWJAvO7as1EE+bY0mYRMc2kRj43RZn Hg== Received: from phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta01.appoci.oracle.com [138.1.114.2]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3y3300r1wt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 12 May 2024 20:41:17 +0000 Received: from pps.filterd (phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 44CFClRc002196; Sun, 12 May 2024 20:41:16 GMT Received: from nam11-dm6-obe.outbound.protection.outlook.com (mail-dm6nam11lp2168.outbound.protection.outlook.com [104.47.57.168]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 3y24ptxfdm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 12 May 2024 20:41:16 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=GGyZzyGkRsI9Ix+nM0a17cKE4zFK7aIKw6zu8vX+y266bUsjTXauITWcDxgZhoWeLaU6a11WfiwCNX8c3Xh/rPyxt/NB0nVNP/qi7Mx1F6iCU3Vxu+fXMlilE9tCyledauTTJAibavZGRfxKmSTUT1fuTwfnW7FRdmtxBq24NlqizYYI36E8pwa0gVAw4gyt1qw4wpRK9NEbRm0Y1LpqWJIhl+7VE7yMk2JEgGAKzVPDZNVU+/u4wbDXTTh1NpRZDiJVycqfZqJy1oAf1mFLPS8tZHFGKh2texyCa33ZOSoHjV15m1WwQmFjBrZnZpeMPVbC7RezmX8gEWkd1NoPkg== 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=7TBQIGN4/1VyAdMPXB7jBAquEDkreAUqTZ6Nv3CaPiI=; b=ieVxfOBEHGNnatnHW+E5MubVh345tbxBnAkc9I/4FdryGh84+XhBjOji2NJTSgDo/R0/oPJr3HKJCal9TnlEKirV9yeyiZxcf55ez0S8QYFYSaNSHHXHIPHaHXNRgIReIgGsblxvSYRJ5kTQevlYTNxrFEYJoaVf5WnpMo62mo8ZXJ+f3vvNwnXkqast4p921TK4F5cdKLsxXHAcWyWxa4o7diJRhpBdvXYKOaUWVWVf1ZynFRyQoShisC3OqxxZ/COx+KN/k7LPHzGJYirb8nBXsTjrpgEjW/DKpby34hFNR3pChtHEMS8k7Hh82PSbweyAyJgHor4Q4vqp2E3lyA== 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=7TBQIGN4/1VyAdMPXB7jBAquEDkreAUqTZ6Nv3CaPiI=; b=nHTP2OVI4kAJsK/d76VwniiKe2Szv/iiO39F1izVfc8HIUWPGXAgMlT//7J9g7XHtWwvf+sILZ0tPE3j7mDD9Ve504gw/uoZGWO0xb9oYzI0j6dHf61QnU+kxtUhzfPCqPGsZ7U6llj+ye0uzb48ADhVv+P2PAUndrCTHyusWXs= Received: from DS0PR10MB7933.namprd10.prod.outlook.com (2603:10b6:8:1b8::15) by SJ0PR10MB5598.namprd10.prod.outlook.com (2603:10b6:a03:3d9::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7544.55; Sun, 12 May 2024 20:41:14 +0000 Received: from DS0PR10MB7933.namprd10.prod.outlook.com ([fe80::2561:85b0:ae8f:9490]) by DS0PR10MB7933.namprd10.prod.outlook.com ([fe80::2561:85b0:ae8f:9490%7]) with mapi id 15.20.7544.052; Sun, 12 May 2024 20:41:14 +0000 Date: Sun, 12 May 2024 16:41:11 -0400 From: "Liam R. Howlett" To: syzbot , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lstoakes@gmail.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Subject: Re: [syzbot] [mm?] INFO: rcu detected stall in validate_mm (3) Message-ID: Mail-Followup-To: "Liam R. Howlett" , syzbot , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lstoakes@gmail.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz References: <0000000000000a13ee06183e4464@google.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20231103 X-ClientProxiedBy: SJ0PR03CA0143.namprd03.prod.outlook.com (2603:10b6:a03:33c::28) To DS0PR10MB7933.namprd10.prod.outlook.com (2603:10b6:8:1b8::15) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR10MB7933:EE_|SJ0PR10MB5598:EE_ X-MS-Office365-Filtering-Correlation-Id: 69f147aa-d00c-4476-8203-08dc72c3dd87 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230031|1800799015|366007|376005; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?YUfDU3VmxLU+L4mehO5fSJUq1PNJkb77mRTKNKlXussdIS7iu3sFfSQja4DU?= =?us-ascii?Q?SlAz1fRk5vTaoYxIZiwucFpyS4PeQnOfzXxFQr7hZuQn1VeRxpPHGwwcEfRM?= =?us-ascii?Q?wDSn1ZimBCkRskRPtlEBhEWTw6emytqPWyhk01jfKAAsPk9RNeCaSjsSnu7W?= =?us-ascii?Q?8emSeAfFGvl7ufcKeafxl2nof5kpwBJ27NsSpaPapQO5iN5Jx8pEZKDZpzQO?= =?us-ascii?Q?hoGGbkPm3EzzfIX6/jrzxo7eKz2CBR+X6HdzPI7X34xjbI7LLwG8c/nSaIII?= =?us-ascii?Q?njL/qa/gwC2gwIYrpkdfEvkO/KfI/4b+MryJU9A33DGGktagaoBINAYfy+lH?= =?us-ascii?Q?cZlT1l9i90maACYUS2fb6KSl987+Pdgx0Bli0K+eOnu7GWJiUcSCz9uKGrzT?= =?us-ascii?Q?xWvVANJREFNJCSh7GmNqWJOl+9q7PhItV1GbTFCDvHCyuDwW0dOw+77Wszwr?= =?us-ascii?Q?tAF6d8DGZ5aFhSNGBbHDwp7/OZL+NPX5nh5vhKntoT0RcAVzQQPyRG1/Mgme?= =?us-ascii?Q?VIDBZwthJG/vMs+KAeKSbEvg0D72i5o0IgXh1M4OoIFplmPsXmKlRxwL8TlZ?= =?us-ascii?Q?FCmuZ0XP2TlX7qmYR2lIBcqzx4FcMoBPyV6Ob9Txow6mJSJ2ks9W0DMRFg8Y?= =?us-ascii?Q?R7FjUUsZtTli5moNMQSeClHgg/nixPa7aX4zk5mQlNncaB5IgD8q+45BpYXa?= =?us-ascii?Q?MV+S18xY21UkaNql4m1PmULAv5BJ4TXwmrNfUeheuM2ZK19GCwAtexoxeqPt?= =?us-ascii?Q?LelNy1Go3R+MimkZkR3Co6V/EFtLljd4WxN/C82xf/LjHe278ir/kmr5v+jw?= =?us-ascii?Q?j/VwhVl+YDklOuVc2S219qtcxyjDBAz1vCLTQBpZa1Lk+qlSfjwcsUKQsISx?= =?us-ascii?Q?94X0eID45brm66lQp87bmikos0fB6IkUz8zezb9lCy2mFEN//FLrFkINqrSW?= =?us-ascii?Q?N8UL0SEC8g/Poahwr6th3acRR/c3kHRWLUHHzmIQijcj7AV6/IWtJihvAWp0?= =?us-ascii?Q?Yt7FoHWmKfLfsXE5X7W2x9mf4ME7xLqo8gPHMgiidRfkk0iO8CA1D0U4bzu9?= =?us-ascii?Q?H1A+Y9PR3GBFVfJPY1pdv3q9fIYXuryn4fOq/WpiRdl0mPpJStU0K9qXep96?= =?us-ascii?Q?lVYCxtQKokAzNDZqxoWj36OoPxSVVG69TRgacyN6+pmEQ51Wcst3EXRaIRDF?= =?us-ascii?Q?GT7z4K/D++FqBxWImqU3MiFSqthemaekYGYvo7+OXJnq81VNEwfvfILLT4U?= =?us-ascii?Q?=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS0PR10MB7933.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(1800799015)(366007)(376005);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?45hqmhhoTUlOys9k2vpEtQW5l1CxVphwzO0eHV+s9c+HG4ML6PzTJH0sGCxA?= =?us-ascii?Q?2AcJsNF7R5XWN5TXnpYgUB3Y8UrkwggsQuBFGuKWsDBfZm0n+xsF412ve/pf?= =?us-ascii?Q?7EgQpMokg/C+BrsbXfbW2QvTbPlWeYmdOsoBAZcfsjsWdv7FVm/Vl0Sumnb/?= =?us-ascii?Q?RFVrtMkR79OnGmgCUD7tWQSwyoz5NAdqvqy7nm4e+ACtH1J5dg7bIeok1yS1?= =?us-ascii?Q?IzYkLFnSimpM+OwWG1Y+XJ7FhexZm5q5mupyPC4OfKbrwqSnWlyQlgXJaCpL?= =?us-ascii?Q?99O2ZrDDieSM+zWzzyXXY4ZeYhul8URBRmybENa8+QWZrApu7hzRnhpMarOG?= =?us-ascii?Q?AJBayacyDT0XnQ1TlHnM+2TJK21VtgLga1Sf+IwSYCG2h3inLkjdYOFj1MPh?= =?us-ascii?Q?cfdadaWQrHewgYAqlunel9OzHaJHAzLPOOTiCTiel5VbR6gWB8ZuO/LlyLkS?= =?us-ascii?Q?aTZimqG1LQSiB9/StTT7QHtrUenWvVn4SZy0l5k1ug6ykZVrRMK4vqCXtvCN?= =?us-ascii?Q?fm36QGHhSCCI6PW1FvfYKi+0C7m37Y7T+PQ6IGvKbokaK/WnmHQ3jpI2/Psc?= =?us-ascii?Q?119re0L7DmRuRFr7eFlY5tuUOZbtVUGp7ThN6V/S1Is45W0g858UUKRHY54B?= =?us-ascii?Q?8ssFSL6YhM3Cs2PxEeWyBmL6+6/KTgREj6LjNwv0j6dMZXqldOvM0oS/8MJF?= =?us-ascii?Q?J+LFlyrd4nWl7uA6IFjgAomWNd+G3vGZPJ3/800scM0LJ32HvAKQIQXL38K4?= =?us-ascii?Q?EvXsCzdMINR719py++yDHn3ikYAN7u45N1qFDtl179QAPoIZbSulVStQUWZb?= =?us-ascii?Q?XImmeze5vpgCWKdU91+HX3Qsx5ddZIkW2FRNzRgKJz6PM9wijzl3berRUBN8?= =?us-ascii?Q?xsylzWbcntofAOOin0KpSxwXLZVwRi5EqwRmOVsaVmccVRIab7gm942JbiPc?= =?us-ascii?Q?I6Yicb4JEdK5OyHNlM0mjJ3TJBJA7dNWiTpOb6qvFRfc4zVYYOQ07yZ6QzeB?= =?us-ascii?Q?Xt2BBDY3GyYMwePSUyamneweucO0lLtzywGeKlOB2ugW0oOaYiYyewKG20UD?= =?us-ascii?Q?mMZ26D2uWnbh9V83n430+h98gAtxqLXPOWke9A5rKa03H9BoLurns7X3ESl7?= =?us-ascii?Q?KgXE2S1/IP/oMpkkoV0MzFR7eIi18QFGotDMHZXK7Euz44wNdAqchim0nafF?= =?us-ascii?Q?8P4VDwOr8qxFTs1NYO/d7TsepUoInQlTNXyxClEIR7F4Qfn/2+66RFovwdt/?= =?us-ascii?Q?XYh5K4VGjHk4LJpdYwJQlSGuhKZzyhaHOQw3bgJuXmqwXzvyx5qTZ69OvZbh?= =?us-ascii?Q?gUkf1KidkjCIbeXq6+Ri9BVCNr7BUE6CeGq8JHjcwdKRaYrborlxHYOCYzTX?= =?us-ascii?Q?Hil/j4+wn/R4+mlmrB/pbiTQOh95tB4HIvpLjnBQyAIWS3ApPFVh5gDFqkvF?= =?us-ascii?Q?1GngVKQyJJIwsUZCA6U8vbBaEMtp+3h4tpY214OFgrtnTKRsc1fmBigTPfS1?= =?us-ascii?Q?6pzjcmZgsqY5IX+HcnFtzN+TmDvZe308/FtY+pkXpYBACqwn9wMpThJHG5Ki?= =?us-ascii?Q?qX0UtUywdYOTX63PH7A0p4RUzwWHxe7jFSNmOQ/7?= 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: 69f147aa-d00c-4476-8203-08dc72c3dd87 X-MS-Exchange-CrossTenant-AuthSource: DS0PR10MB7933.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 May 2024 20:41:14.2237 (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: ouVd9Td2CTRuR1nz+mEpceeYmt1Un9m5mKdIvaJhwFW+nIbsbrnkoh1V6t+B3AHR2jJ95mUWh2yd9ZeY8TvXKw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR10MB5598 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-05-12_15,2024-05-10_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 adultscore=0 mlxscore=0 spamscore=0 phishscore=0 suspectscore=0 mlxlogscore=999 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2405010000 definitions=main-2405120154 X-Proofpoint-ORIG-GUID: lWzhkavAP-kRz4GscSTFUjQLrZrqrQuC X-Proofpoint-GUID: lWzhkavAP-kRz4GscSTFUjQLrZrqrQuC X-Stat-Signature: riwtpjkb35st9x9x89rd3yjx8robp8ao X-Rspamd-Queue-Id: E58264000F X-Rspam-User: X-Rspamd-Server: rspam01 X-HE-Tag: 1715546480-886371 X-HE-Meta: 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 oyF5X6vI 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 bHnh2o61 VvH3DT9ISrAOz1zSSbnZTjNnGdtH7BbohVGRa7BfZS1ibWx2Gkkrlsk+pU1TMvYo/dqDVBB1F0F5GaeXaTQcztZ+587ufJIjcvQx3mDVc57uxVPkgOdHtwStiXXHHZVrXmjjoZDr3gpJsTJxz6xHcnqLuzx0AtqkdbM+JxyPLTc= 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: * Liam R. Howlett [240512 13:28]: > * syzbot [240512 05:19]: > > Hello, > > > > syzbot found the following issue on: > > First, excellent timing of this report - Sunday on an -rc7 release the > day before LSF/MM/BPF. > > > > > HEAD commit: dccb07f2914c Merge tag 'for-6.9-rc7-tag' of git://git.kern.. > > git tree: upstream > > console output: https://syzkaller.appspot.com/x/log.txt?x=13f6734c980000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=7144b4fe7fbf5900 > > dashboard link: https://syzkaller.appspot.com/bug?extid=a941018a091f1a1f9546 > > 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=10306760980000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=138c8970980000 > > > > Downloadable assets: > > disk image: https://storage.googleapis.com/syzbot-assets/e1fea5a49470/disk-dccb07f2.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/5f7d53577fef/vmlinux-dccb07f2.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/430b18473a18/bzImage-dccb07f2.xz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+a941018a091f1a1f9546@syzkaller.appspotmail.com > > > > rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: > > rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P17678/1:b..l > > rcu: (detected by 1, t=10502 jiffies, g=36541, q=38 ncpus=2) > > task:syz-executor952 state:R running task stack:28968 pid:17678 tgid:17678 ppid:5114 flags:0x00000002 ... > > I cannot say that this isn't the maple tree in an infinite loop, but I > don't think it is given the information above. Considering the infinite > loop scenario would produce the same crash on reproduction but this is > not what syzbot sees on the git bisect, I think it is not an issue in > the tree but an issue somewhere else - and probably a corruption issue > that wasn't detected by kasan (is this possible?). I was able to recreate this with the provided config and reproducer (but not my own config). My trace has no maple tree calls at all: [ 866.380945][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 866.381464][ C1] rcu: (detected by 1, t=10502 jiffies, g=161409, q=149 ncpus=2) [ 866.382152][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4295023801-4295013301), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 866.383324][ C1] rcu: rcu_preempt kthread starved for 10500 jiffies! g161409 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 866.384952][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 866.385972][ C1] rcu: RCU grace-period kthread stack dump: [ 866.386582][ C1] task:rcu_preempt state:R running task stack:27648 pid:16 tgid:16 ppid:2 flags:0x00004000 [ 866.387811][ C1] Call Trace: [ 866.388164][ C1] [ 866.388475][ C1] __schedule+0xf06/0x5cb0 [ 866.388961][ C1] ? __pfx___lock_acquire+0x10/0x10 [ 866.389528][ C1] ? __pfx___schedule+0x10/0x10 [ 866.390065][ C1] ? schedule+0x298/0x350 [ 866.390541][ C1] ? __pfx_lock_release+0x10/0x10 [ 866.391090][ C1] ? __pfx___mod_timer+0x10/0x10 [ 866.391633][ C1] ? lock_acquire+0x1b1/0x560 [ 866.392133][ C1] ? lockdep_init_map_type+0x16d/0x7e0 [ 866.392709][ C1] schedule+0xe7/0x350 [ 866.393139][ C1] schedule_timeout+0x136/0x2a0 [ 866.393654][ C1] ? __pfx_schedule_timeout+0x10/0x10 [ 866.394142][ C1] ? __pfx_process_timeout+0x10/0x10 [ 866.394596][ C1] ? _raw_spin_unlock_irqrestore+0x3b/0x80 [ 866.395137][ C1] ? prepare_to_swait_event+0xf0/0x470 [ 866.395714][ C1] rcu_gp_fqs_loop+0x1ab/0xbd0 [ 866.396246][ C1] ? __pfx_rcu_gp_fqs_loop+0x10/0x10 [ 866.396852][ C1] ? rcu_gp_init+0xbdb/0x1480 [ 866.397393][ C1] ? __pfx_rcu_gp_cleanup+0x10/0x10 [ 866.397988][ C1] rcu_gp_kthread+0x271/0x380 [ 866.398493][ C1] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 866.399063][ C1] ? lockdep_hardirqs_on+0x7c/0x110 [ 866.399570][ C1] ? __kthread_parkme+0x143/0x220 [ 866.400045][ C1] ? __pfx_rcu_gp_kthread+0x10/0x10 [ 866.400535][ C1] kthread+0x2c1/0x3a0 [ 866.400916][ C1] ? _raw_spin_unlock_irq+0x23/0x50 [ 866.401409][ C1] ? __pfx_kthread+0x10/0x10 [ 866.401854][ C1] ret_from_fork+0x45/0x80 [ 866.402284][ C1] ? __pfx_kthread+0x10/0x10 [ 866.402718][ C1] ret_from_fork_asm+0x1a/0x30 [ 866.403167][ C1] I'm going to see if I can hit the corrupted stack version with kasan enabled. Thanks, Liam