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 5610DD0BB56 for ; Fri, 25 Oct 2024 15:47:08 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A3B676B0089; Fri, 25 Oct 2024 11:47:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9EACF6B008C; Fri, 25 Oct 2024 11:47:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 816FE6B0092; Fri, 25 Oct 2024 11:47:07 -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 5EF2E6B0089 for ; Fri, 25 Oct 2024 11:47:07 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 5715F140B7B for ; Fri, 25 Oct 2024 15:46:46 +0000 (UTC) X-FDA: 82712552328.03.25D4EA2 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by imf13.hostedemail.com (Postfix) with ESMTP id 2A2632001E for ; Fri, 25 Oct 2024 15:46:42 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-11-20 header.b="g4+dJ/Ly"; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=G1PeO699; spf=pass (imf13.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; dmarc=pass (policy=reject) header.from=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=1729871018; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=4G8RoUqgkf1RlnkAzpc99yQyfnZgXbxtvwAoCnhHYUI=; b=XtG2WyNW4MF6wGy99NSGiDJHlw27sCuJ7/6UHEEvZaezSA/7vtOX6+F2zRZG/izibNSeLy q/LMzocHpq4dw0ecin7M2LubDyT0MC2yTh9eceUEjmgOK5GaMTb0d5zYUMOYtH4RFTWbYr XbWWxko/bwlhPiiV387LFgoUBFtnYEc= ARC-Authentication-Results: i=2; imf13.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-11-20 header.b="g4+dJ/Ly"; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=G1PeO699; spf=pass (imf13.hostedemail.com: domain of lorenzo.stoakes@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=lorenzo.stoakes@oracle.com; dmarc=pass (policy=reject) header.from=oracle.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1729871018; a=rsa-sha256; cv=pass; b=srkBV3UJc3z7QXO0Y1hanymRFMu+0NPWYfDleUAr6lcr0zr8pw6zku0U41ATuLq6cOBM5J WpV0hScEi61ghaquRQDhx8zkTDwzCdIz4/THZ1SHxBI/7II/2YnADnNxSrBl9SViZW38yo IDUgs3DaoHc4GbiHnGGfZ+GoMs/4kAA= Received: from pps.filterd (m0246631.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49PFfbLx018454; Fri, 25 Oct 2024 15:47:01 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s= corp-2023-11-20; bh=4G8RoUqgkf1RlnkAzpc99yQyfnZgXbxtvwAoCnhHYUI=; b= g4+dJ/LyDZKN7cJfMjCerZj5L3x6GA82L9c3skIn9kpgnBN7QBNCJK0wWOfOKZwY KfyCVBjhMRDp9V51OiCdx8+7h0sUMprGia6/+w5ySFZPkw8+Nq0hhBNOz8X5CUkB wFzuY7dGAdL6trPLsvBKgj947wRTa+Q7uzk3G75MeAVIjaJ8+5cqyF22p15g9JvW wQSaG09RzIaueoJFsrPP+5q6DS6GVHkbL6579iTjR2dcCL6IBnI2dxvFayE8/pvn 3Yl86uYnAiKVRfUc/XqmoGD8kVLoQ8H6Fqe/RusP2E7qLB8pKGpciV+fuCa2LiIo VZhYgoWlWZSgLVGVAW7s+A== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 42c57qn8j3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 25 Oct 2024 15:47:00 +0000 (GMT) Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 49PFiMfD021028; Fri, 25 Oct 2024 15:47:00 GMT Received: from nam11-bn8-obe.outbound.protection.outlook.com (mail-bn8nam11lp2172.outbound.protection.outlook.com [104.47.58.172]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 42emhnhm8t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 25 Oct 2024 15:47:00 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=NERB2G6csgj86NQnAuxwxwTapYYp5srntFO72nOdxtkSh6ZYdGNVwdpncQs0JW1E2vEUZn2lLvlq3eUVpCzkOvlOh0CEPy9tq8FHLdgihaygtVlzZ62MerJ5+InQ5cdWatl30Kc1A+dmBg44w3wtd8cFIV4b/Pal8ZW9lBcvLJREiBFeV+RSecevUFMJToMEN0mXvJVtwpFnnO+C30+Ejvmn++l+vHixwlU4ttUbioLCFWkMQMBjd7R7fpq5glrGR26vBeedyqKXkYrUjV7TVdk99HaqZu0GOu+iyGjKmP2twccpgAviP7kCPuhAWp4KzLNR6+xOuRTZb5tJTx5vAA== 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=4G8RoUqgkf1RlnkAzpc99yQyfnZgXbxtvwAoCnhHYUI=; b=jxnNkcGdujA2R8PkJLIDvMp7m0EiXNuS/wuNC/s7IbGTt/cWoJ8IZAyyI5a2qZg6DK7n1t6mXN7qbukr58vLgCtOh0xMcaYiPCxpFVpoTLHpfVpZdRGqugLwSJbQZusZ5BArL2sPmm02a0DRE3LIMZ33YqFCeZkASt54rVQco4676N1IHCoBlZ55Ya3T7y9MOMZFY+X+9SFXntHV5Q1QgHjLpZMz9QxYPVu6gFpFsvu1dXXMo4Khuyp/NUSDHCUkg1yyA7rfXYaZ3jOoK/nATqNT2znHerEKeOA/KMxapPI/nSLL2/LWwlq7JqGIwjqv4Oy/4oIRU6H/QIMEIIJvKw== 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=4G8RoUqgkf1RlnkAzpc99yQyfnZgXbxtvwAoCnhHYUI=; b=G1PeO699ftEGVQUjtv8+gj9puZhUtzVVzoKc4ig5R3cTPYmyyLrzCeX1uerofZejUiRusFekPI7A3FjvvehN3mieYQhTCcRl6bPpOgcS5SA3auCQW/E+1SYJRBoAAiGCYko/xY6szbFWWggTpzm9dAYs/HZJ7SbkxEqz30OQsnQ= Received: from BYAPR10MB3366.namprd10.prod.outlook.com (2603:10b6:a03:14f::25) by DM6PR10MB4219.namprd10.prod.outlook.com (2603:10b6:5:216::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8093.21; Fri, 25 Oct 2024 15:46:57 +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 15:46:57 +0000 Date: Fri, 25 Oct 2024 16:46:54 +0100 From: Lorenzo Stoakes To: Jann Horn Cc: syzbot , Liam.Howlett@oracle.com, akpm@linux-foundation.org, 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: <9ebc4798-9889-4245-9cc6-f3192d00cfdc@lucifer.local> References: <671b7fb2.050a0220.2e773.0000.GAE@google.com> <832afb0c-98b7-4d29-8436-1ff6a65133b8@lucifer.local> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-ClientProxiedBy: LO2P265CA0067.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:60::31) To BYAPR10MB3366.namprd10.prod.outlook.com (2603:10b6:a03:14f::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR10MB3366:EE_|DM6PR10MB4219:EE_ X-MS-Office365-Filtering-Correlation-Id: 708acfc2-75a4-4873-ce5c-08dcf50c41cb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|366016|10070799003; X-Microsoft-Antispam-Message-Info: =?utf-8?B?ems5S2Q5czJkT3NpeXdranNJUnNVOVlMcGV0aVFLelRHUjJVOWJHaVNCYmpy?= =?utf-8?B?R0pmKzFxWWVua1JUNHJkbHJhSlhiZ1R4ZHJYcHN1b2Z4bHVTbG1ybVNQMXNE?= =?utf-8?B?ZkZXVFFudW52WnRZTkwxZk5OcU9SQXlxZTVET1NSdlBxOHFXeTNJdWIyV0hn?= =?utf-8?B?czQrUGE4bDZrdHE4RGZ5K20wdHVvZjZhOFhoNjFXcU9JWnNCaHp3TjR1d0FO?= =?utf-8?B?SnV3bWltVzNpUVhsMWp5UmE2cnJBcE9XTEFOckhDSmJKNWU1b0EwWUkzcG93?= =?utf-8?B?aUNyZjBxS0pWeDhtc0VXK21sV0d1cHdaQ3RYRFRvZlVyL2tkcWtpWXlxTFBt?= =?utf-8?B?RUU0TWpwaW5jUEJ2cHExMnFDWXE5clRtR0hON0MrVEttYzJjdlRiYUFLMDFT?= =?utf-8?B?VW1zRk8wSnU0RWxoWUU0Vmt5R3dhK3RicEFsdW5IRXJOR3JJMy9mUTJENkRa?= =?utf-8?B?ZmlYbWRGV29YK1htSjF4WEpnREM0YmxvbnovR3JhWXRyRTI1UXZGSlFXdEQr?= =?utf-8?B?d0NHbFlzOVRPcTF2TlQyc0VMdk93WXowY3ZaQ3R6NFpUZmRKRWxjUkZrTmZZ?= =?utf-8?B?VzdoeExJazBaREhNSzFVaW9pOHdjVWwvK2Mrd3phZzZRajJJc3ROaU40c0Jr?= =?utf-8?B?c0prblZDL1pFWEkwbzZVd0lWYlU1NVFjNWp4ZHlzQWZnL2dFeU9mMXFGWFVR?= =?utf-8?B?MzFXSlFHSUlqcWlYYWFQbVRUV1NBWmFWTm5XeTJJNDhicTZuWllqTHZtWHFv?= =?utf-8?B?Z21GV2VlUjNSMzY1RkRwM3hwU2ZtT25wanBnVk9Kbjk5VElhcnFDZnJKbWV4?= =?utf-8?B?UjZwaElrQlJxMUdSWjFrWDZYRmdsN0k2NW5zQzlmdmc0czRZbGx4SFpGVnkx?= =?utf-8?B?Qys0ZUtQaldaUXFuZGpWcWpDaUNSWEpMZ0tKRXJ3UGVoRkFGMmlCRXpiZUt4?= =?utf-8?B?Y1FUS3NnSzNaTkZMdUdIaXRBR1FiMmdXKzFvTndIOWxtTE9YdTNvdkFmQWxy?= =?utf-8?B?cVh0M2d1MTlhY01PaVlsT2Yva3liWnJHMVU4eWRGRUZ3ZkZGVldiUEZra2Rq?= =?utf-8?B?TWErT085NzJ6K29RYUtsLzJEUis3Q0tPSTdUMHVYeURmMHpTWEpCWXgvSkFu?= =?utf-8?B?WTZpZnlGeEMzYkJIYmtNc1IycjZ6akVkM1dhVjJ0N20rNkcwc0ZUMzNFOWNL?= =?utf-8?B?TVZpaFlHWE5CS3hac3UwcWZ1OEdpbElTN2RDU2tVRDBRemdOSXBUamppTVEv?= =?utf-8?B?MUNtakdzd25QWFk2SlpCVmg5UHlBQi96b0ZtaGovdkRDT2h3UDZXckFKR1ZP?= =?utf-8?B?NjhNRFVNRWZzbWZYZU9lNmZVNFdkeU56MlJLYzhJcUoyUHZoWTZHK3lvUmJC?= =?utf-8?B?RGpheUpxdW9Jb1FkYUZ5WUdUVHBraGlrSnRLM0E3SnRqbUFLOEN3SS9vOE9F?= =?utf-8?B?QmtFczlUU3FlUURMYzVWWEd6RmVIUGt1bmdqcklYcmFsa0xmSlplTFhnY2pU?= =?utf-8?B?TU1FZlJYQUM3a2VTc0pDVmU5aXovVEpDT2thNzJrd2p6KzFWeEIxZ2doZXBr?= =?utf-8?B?aUdNdHc1bkZYQXBGWEFLRDJGQ25vWFBJRWExVU5WZWo2S09tY0ZIclBLMERE?= =?utf-8?B?SVlqQTd1V1pDam94QVNNSDdXNStseWNtL2VJQ0labTdJYmJMQmowTUJzUFdp?= =?utf-8?B?ZGlZN3N0Vm5MT25uWXN6V3JaZndRMkVGMGs4L2VyNVZ6SHEwZGZWdWJBPT0=?= 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)(366016)(10070799003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?RktjWlY0VmYwaXkxNGE1SmFoNWxYbmUxV1pDOWtlNWxTMElzTTdaeU5qZnJW?= =?utf-8?B?R3d5ck9zeG1PUUZ3eXBFREtGaUs4WTR0Z0IzZUVwdy9pNUFFRjlOcVMzQmRP?= =?utf-8?B?U1prSzJUbTgzUHVQdXNHQUJJYzBmUjZpS0lXNXZyNzJ6SFBmaEVFbHFUZzkx?= =?utf-8?B?bStnNU5zSjl5QWwxekFqay82RlgzSEFVUXlTNTJMd0lsd29qVXlXdTlNMHdS?= =?utf-8?B?Y3h0aGZCc05vM3VnQTAvSFU0NnVoMjhmcDFucUxPczBSeTY4MUttaGRFRUlG?= =?utf-8?B?eEdZeUhIL0prMzlNZHRqakd1aUR2Q1UwMkxFdVJQSWMzSkViU1A4aFlrdkFo?= =?utf-8?B?S1RIZm40L1YzK0Fxak5GcWl2Ymg3UFRyVm9YM0lXaGlhVTJ2NmtlM3g4ek54?= =?utf-8?B?QlF1Q1BCVTVIeE1nbkFqdkJrTDZqQjdWNnlpQjN6dm1tOXE1TEp0QjYxZ2tR?= =?utf-8?B?UGxzWDlFY2p5S3d5V05yODVyMFQvY1FmRVEyZzc1RmU1QnpDZThIWDNrdWtO?= =?utf-8?B?UlJWd0pDcDJPbUNzUG9KdWkvMnNsNFVpeFRmY1IrVmxxcjJjd0hqcm5tTnhQ?= =?utf-8?B?TUFFTExtZThwb25vR3RnQTRvMEs0VTVQUVo5WG00QzNrWldBblpJVmxCZmRG?= =?utf-8?B?dnhDTTh6ZG8raEZzOFo5bU9GMWhZZFpFMXFtRzdYWVM4dzlMOEE0TUpkZEQv?= =?utf-8?B?L202bENDc0ZEa3lnNlYyWXpsdnhxc1BRVWI5RUNYejNidlZKcnpnUHZXZkFs?= =?utf-8?B?ZUh0YXdLKzJyNUtxVG5JOFdMSFBOT1VuWks5NWxsaCs3YlhTUkpudGJkNTBX?= =?utf-8?B?bW1pUGFTdmlsUENMZTBFQUFXUHBreHdNRStqWk90WkFRUHFzdkFielNxQ3JM?= =?utf-8?B?SjB5S1ZMNmxLUjU1MlhSNmNQU1g0TzRSR01VNGlOdW1YcGxqVWlaWWFJVkxt?= =?utf-8?B?bktkSktBK0hHYUl4ZHVLMVV3UWVGNndmMmVXUk53Tkp2bXJSVlJ5ZXBtVXJi?= =?utf-8?B?L3h6akRtcW5keGZYU3puaWYxWmh0Z2g2ZzExT3RrQVZ3NkhKTXNtdnROdTVV?= =?utf-8?B?aXQwTGZqYUFCTGtubDFEYmJPM21YbDBKSHZDdFFrbXhwQ0RiUjBLOWJ6VUR0?= =?utf-8?B?SU5wMGE0eXBJZGVzcGZyYVdNN2pLT25EZXJ6NElZOVFoLzBNTUNEaWR4clM0?= =?utf-8?B?ZzFXeG1UNXUyUy9pbzA2QjV6cDB2REpUZE1wN2d5UVR3cEpadWQvN1NUUVlQ?= =?utf-8?B?UTFBNnV1b2F4WkwvdElsTlAreFZ5VUZFSUZiT3dqbVVnRVdGaVhlUzlrSVlU?= =?utf-8?B?eFZqdkxReVV5c0I0NThGUTR4aTBjVmwyMzNrYXdVemh3aGxrTGlKWmE2NTBV?= =?utf-8?B?VXpzRDNBZ0NkVFh5NUl2QmpSc1JXNXJmd3dPWS95K2VaT2tVVHB1ZDlNVzBo?= =?utf-8?B?b0NzdXB0a0tOMmJKK3ZNT2hMODJIN2s3SzJwVXZGT1dFSWVwa3FIWEptYzhW?= =?utf-8?B?U2FxMHJUV0FZckY2eEVFMTBnNjRaQXg3MmRrWUI2MFlGajJieHJpQkVPNEN6?= =?utf-8?B?RWFGNTlrQ1NOWWpHbHBiUjFPZGFUMmRkSHJ0R3BDS0ZvSyt6c3dZa1NxcWlN?= =?utf-8?B?ZkdzYkxmK096VmtWbTE0YS9QUGcrallHdkVJTWIyY0hnZXRsNkVNdGdESmpU?= =?utf-8?B?NjRMSW5YM3J5M3pyblRPOElMZzUzK3dZQVlsVWQ4cWd0b1JIYTRUYmdvcTdB?= =?utf-8?B?bkJ4eldTd0tFRGdLUkdnVVdHTWplOS9tTjJTckxNZkEyejVMdGNORjdSVGZk?= =?utf-8?B?czZ2L3RkWGN4NmZBUW40TnJpc0ZQOXlJZHc0RytvUkZsbURNaEQycm9hdnlp?= =?utf-8?B?dlZhZ0VDRVNHZ0FmbnoxNDlPUVlDN0ZDdi9VUlFLbWpVL3g4ajhGYzVzYkZ2?= =?utf-8?B?cUVsVzQ5TUFEeUd4V1RiekdJRjBjZWlFdXBoWlRsV2NzTUxuT0xJbjVvWGxK?= =?utf-8?B?VzFpVmQwMUJQQmttaThjSSt2THlZSFZIYnYyV05OS0dKWjhzcExZRStSSVY5?= =?utf-8?B?RzNOZFVDZzlUQ0pwRzhBTzRUNUd4dU1FL3hYTXhmVEltampFdWc1aDNJL3Nh?= =?utf-8?B?M2xYZEtWcGcxdG1YTUFIL0NOcTMwaU1SWkpZcEE0NGhDZ2JnWUNiNG10VENJ?= =?utf-8?B?TENTS25PWmhUK0VjQUtqZE52YnpINXp6NGVnaktTVFMvY1MyNm9hMHF3SDU2?= =?utf-8?B?MmxoSUNjL1BpRnROMWsrTEcxenJnPT0=?= 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: 708acfc2-75a4-4873-ce5c-08dcf50c41cb X-MS-Exchange-CrossTenant-AuthSource: BYAPR10MB3366.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Oct 2024 15:46:57.4525 (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: R6o5SfhRIKceRs/TuyJ9q6U8+Rm8di06YXuq2v3ACEzxvYEtDlDFfhhG4qdrE6+QpWZ0O+x5j2HNksNsBMfCG5Gt/rnSQyc/ltmhcIPWd9o= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR10MB4219 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 spamscore=0 malwarescore=0 bulkscore=0 adultscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2409260000 definitions=main-2410250122 X-Proofpoint-ORIG-GUID: Q48KCW0u5nQB4bfN1rj-okCZ1pyjHIV2 X-Proofpoint-GUID: Q48KCW0u5nQB4bfN1rj-okCZ1pyjHIV2 X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 2A2632001E X-Stat-Signature: u9dsngef7no8jng8anhch5f83i99kbgw X-Rspam-User: X-HE-Tag: 1729871202-369074 X-HE-Meta: U2FsdGVkX19kgkAgrtRhmhCcxS5fHeCqM/9iCWcBOVXrMvdb/HG95KIMepx7xTdSCq86Um1IyDBeWhcaG81bOw5kT0gTs78Cb1cMQD3R9MkCpGofS/OEMyGG/vP6TfPbWE0MSIIyT0zAdAVUptj8ldRcVewbEQQbNdmHNk1XN/jRoUcHbIQmYkIeueuuo1uwWUBwO10K8TUoEG3zej66ZQOUre7/lXC/Tnxs+hgFD6ssM1cAMMGSqKVRbNFzsP/iMVbCM9l+t2KYQ7AAJ97+8XjUTd2OYG4dWksPblyZErAyjr+9dSRp2GSUm3qNJj6dcu16jwdnEB05xuvQY/SAONNk6jjaCfy1eGPjCPwV92sPYRss5ly7T4uJ4GlIwBMQ1Z2WBIYQemEH/P2xq7QvqNDwrAdSBdIb/QRDFf6DBaimMagffqTBRdtdvox6HizP1fynB69lnUrQomKJgODOLlJo0lHsCgk6afsqmAXxZ8b6E3Yse2gNhEk1yaAQ0OJXGtoHaL+KkHrmgYlsr/gzl4YLGytO5C8JH+ldYX0i2pUYlXYl9/wveofvFb2kNQn9s2ygEXl3YNLOq5SqccdSCdYWVFqesVIkEsQAYVmkfHLN0lhZWhXGBS9kfzMoQonz+ythoLRHMqadO4JBiTVrB5JmtT6sH8aXY8+93G5VCozyvJ6EFuxW5TdHQGZJQYnkuiw7lGzdNxQIhAv+JPPtK4G6MzZjdJRJzw6H/30btXh/rI+01CREcQwzHLHXPBRrPHVbOug2KyXnuqOvqic2lFZdkxFpzdASjTDH0zLhNN6UW3r2+6uy6PjT4wFtiwDFRL9I7KWWTlbY4d1Ff3hYz3PSit7DXaFv3G66oirZ4UAqyZ5O0f+Mz/LjqFQ6OcbXZI+4MofJy+Vi5OPIRIh6e3GmbMRaSURHPXni081pcrkt62Q0jiSK0Qerh6xZfHh2vK2IVMBqZtZCz7M83An bEKsHOMq 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 EyglzT2o 48XLec029nB/9UL7oBD73g2R3XUHG/t9/99D4/UN1wkFwLXYhM2kL8H4UtbEEpEQTap5YO2CscQuNYb2JcAN0nkkGT9P0RWZnxU0prWZWhTfeNsanpTpOO2aSG1W5XEHlS3QER8A4vKfu+jA79utNw== 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 05:20:52PM +0200, Jann Horn wrote: > On Fri, Oct 25, 2024 at 1:37 PM 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. > > Random side comment: It would be nice if the kernel was able to report > hangs in two steps; somehow scan and mark the stack in a first pass, > then wait another minute or so, then scan the stack again to see which > functions we haven't returned out of within that minute, or something > along those lines... Yeah that'd be nice! You'd get more information that way, though of course one stalled task might hold a lock another actually in theory unstalled task might need thus deadlocking it... :) But at least you'd see that, and the lock splat there helps obviously.