From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C79D5381C7 for ; Tue, 25 Jun 2024 02:15:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=192.198.163.17 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719281718; cv=fail; b=shkMCxTVDc4Cgu7Ap42gLA3opwgJj+UMFoBdWbMPyb3f0hCfOIuzrMwm1cxbGNe9N/sunvoNLnBj9i3o8/LYk9eyWRDv14Lwcx+vQoFLEoi7AlSaVfajGD1WWChI3H/kjLCL8Nq4Co3TK73L0kDmigD1wJV/3Xx7393I7yXcZGA= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719281718; c=relaxed/simple; bh=QgZFkYJtu9+tF+jcnUfhySToMShrYiX4KJ0eJ77lHCY=; h=Date:From:To:CC:Subject:Message-ID:Content-Type: Content-Disposition:MIME-Version; b=HIf2YnY7LlgzjbvIyaXv8U/B0AHxkqjI3FONSI5ehH2kqE8GdgzbsRDhtFbVqFKPU+Q//CCSpyILCbRdVOQ0YK8fFxzTFaZxyOL82YgcLGGPqy0RpfOJB8f1GZqSGCcjwJpKTQvFxtoz3bq8tf3FUUowUmcEm4z4FRx7ytuVJRE= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=H65+aE5/; arc=fail smtp.client-ip=192.198.163.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="H65+aE5/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1719281715; x=1750817715; h=date:from:to:cc:subject:message-id:mime-version; bh=QgZFkYJtu9+tF+jcnUfhySToMShrYiX4KJ0eJ77lHCY=; b=H65+aE5/4Zcn8Qw97RiFKqOODXWBXfGew2XGbUW0SdMdNj86KyU+2C17 AGVFNZpcJqZUS63CUK6vKavwY8nzGrFZeE4lrkkohuOpzI1iz8n7KTe1w g2oDnhI0ezEceccszyTnewWNC0WR67ysqxZsxUa9+ZXfPsll+J62gSaF/ V6xAxuS/U3MGZJLxmVB8JjKeYfhhdx2aJK29Q2hnI+5a8sonnbp58wrUt LudNGFDWLDGfs7pKfDTjtJmHXl2d8JUXDTSa3yyJgB8daTJZ8Shu86M5n 7vrwz0nhkxXuxlVNtsSROxCDTLfMzcw5yj9gq9apOmkeD8QTmleHgG064 Q==; X-CSE-ConnectionGUID: 11ErfA6sQUqNDXzv+CLETQ== X-CSE-MsgGUID: iFrNP5/5RueJT8VNPw+VDQ== X-IronPort-AV: E=McAfee;i="6700,10204,11113"; a="16154938" X-IronPort-AV: E=Sophos;i="6.08,263,1712646000"; d="scan'208";a="16154938" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jun 2024 19:15:12 -0700 X-CSE-ConnectionGUID: 4sPXTF4nTwGyiGZ7EzyzZw== X-CSE-MsgGUID: L+Q4gWREQxOH1r5khDRGsw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,263,1712646000"; d="scan'208";a="74695808" Received: from orsmsx601.amr.corp.intel.com ([10.22.229.14]) by fmviesa001.fm.intel.com with ESMTP/TLS/AES256-GCM-SHA384; 24 Jun 2024 19:15:09 -0700 Received: from orsmsx612.amr.corp.intel.com (10.22.229.25) by ORSMSX601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 24 Jun 2024 19:15:06 -0700 Received: from orsmsx612.amr.corp.intel.com (10.22.229.25) by ORSMSX612.amr.corp.intel.com (10.22.229.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 24 Jun 2024 19:15:05 -0700 Received: from ORSEDG601.ED.cps.intel.com (10.7.248.6) by orsmsx612.amr.corp.intel.com (10.22.229.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39 via Frontend Transport; Mon, 24 Jun 2024 19:15:05 -0700 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (104.47.56.168) by edgegateway.intel.com (134.134.137.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Mon, 24 Jun 2024 19:15:05 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=g9LnC0Mk8cniNasl2WK4/A0YO4avS1mh0hVAiWF0xJHqD+mhGNaVBB22jcYCtcUKA0e/zmUkIse4FXHtE82U27Eg2rl9l0CAMU/FeIaz3KYFnTte16FE4I5M8KwF2zzuTnaTVoR7bO+a5UIu3QlDWOA7h5QejhFtDQAmboG0Alw/okIzKAZojkVleJNGU+h9VvcIA5UmduKEWPGC6XuC/Ymr8CTlDRbjeP5hUo0Q722EzVpe7Dw35lGNKZ9YcO2l94nJt3Hfcm9TrNx7nmsGehiCz8JnUlp/dslQK7PdDWZdVoUJL+5VJ0m+RdoN/88UIWAnJzyK1o2dosEDWpD8KQ== 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=H0PN499AbsZhb7puNtBWqRYvkBIl25Ei7SDqEVejycs=; b=AOdx+TN+YJTywc1dgBpFekOJfIT3O/d0HFbfWk1vF4VO5zxAz/SEbvk8das6wfKaxhhVvcmfspOE7Yrxq9UxCaOxDfX3FBleOdB0trYa2UV6vzjdQ1/I5LUMtj11HlSGCLBPEApmgv2LkdDs8bg8qd1cRHvfYUfxqXwWmVH+44LzBU2GHeeOyNJCSvSU0VmjjjtATCjoIz2a4TDKefGLf+IU37R/OsBLLPs3Qv79cCSbEAt4Si4ek9e8EGawuEp4OVpTcwzTky2PMZKWnGBvbP/dmyktlfghr6PrPWikXytKBHE0NhhNJmeRqo64tPJKwGUPrbGHd8164iEfvjNhTw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; Received: from SA2PR11MB4844.namprd11.prod.outlook.com (2603:10b6:806:f9::6) by CH3PR11MB7868.namprd11.prod.outlook.com (2603:10b6:610:12e::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7698.30; Tue, 25 Jun 2024 02:15:03 +0000 Received: from SA2PR11MB4844.namprd11.prod.outlook.com ([fe80::b3b:d200:42be:fe4c]) by SA2PR11MB4844.namprd11.prod.outlook.com ([fe80::b3b:d200:42be:fe4c%6]) with mapi id 15.20.7698.025; Tue, 25 Jun 2024 02:15:03 +0000 Date: Tue, 25 Jun 2024 10:15:34 +0800 From: Pengfei Xu To: CC: , , Subject: [Syzkaller & bisect] There is BUG: MAX_LOCKDEP_KEYS too low! in v6.10-rc5 kernel Message-ID: Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline X-ClientProxiedBy: SG2P153CA0012.APCP153.PROD.OUTLOOK.COM (2603:1096::22) To SA2PR11MB4844.namprd11.prod.outlook.com (2603:10b6:806:f9::6) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PR11MB4844:EE_|CH3PR11MB7868:EE_ X-MS-Office365-Filtering-Correlation-Id: 4287253b-5bf4-4603-ac11-08dc94bc9fe3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230037|366013|376011|1800799021; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Y54RSfL6FR16gYRYZ7SYQn0JuHxgtqupMS8ICzDBzMyRJxUACaRp33qe6iWh?= =?us-ascii?Q?rbL5T/EeTj1NUNaUVHbAoqDqmhWW2+AODRoJd999cILiACmFajpcduS7BsuF?= =?us-ascii?Q?ve9GpwhkiNmHy4rqbd+7bFZ8P2NHzyiWBA8B2G6USCKuzFaFAsbOluIH58dD?= =?us-ascii?Q?HGTULlo750tNtuxvc9AvFxkHgrRury2wLtNMJpnmG3o8n6k4HBrIO+pUFp4i?= =?us-ascii?Q?DnGhIoIdKYXp5AwJXrrghmP6upNYPMViDdjfnHMBGlQKjJOz4+EkYUrLSHZ3?= =?us-ascii?Q?ytpzfj9/TMmnz5TgTh3csQjK4Mmb1d8rlPIHZBwQUiuu7HzFqE5QTybDq1HI?= =?us-ascii?Q?Dyjw3c+44kY1t/ObZTYm/Bgg9ozPPOkD5XL64R3l1xxg9QsCoBZioeInzZFd?= =?us-ascii?Q?ISgHJ44a+AVf5IZ35eRZicghjtIzPrzMQoMJLtLYC+j0dZsD7UQkNXDeHbT0?= =?us-ascii?Q?k/BYYF+Ky14IHGX36w+eWqrl9JDWVpJTt1t/CNGLKwHIdV41PsEJD0n5kfNU?= =?us-ascii?Q?EWEQT0p3MKLFYP8nbxv/T/KLcl4MT59fVljeMR7WbEyCuTlY3ux5AlfshR/u?= =?us-ascii?Q?orfYutqXNrWic+q8dkxNl4rdie5syfnQsLNyZRk+wIuy0dLhWR6p6HKWyq7R?= =?us-ascii?Q?h8F3ROD76YHSIHnoS3syuC1Fu32vqUM/llYfK4JRDEU9LKIQ/Lvz2vRKU9PG?= =?us-ascii?Q?nfL/I6HnAx91wvCOeIacz/t3w0pE7on5O7GYl3IPEMK+mJFeq2j6q+mAVbs/?= =?us-ascii?Q?OzDt1ENJC/gXP4QhL/GVZE50leY2Hvq72bsdIlbCLe6+MdnububPunV0P9h+?= =?us-ascii?Q?Xxt7gEFlqNImb6oBIq226/rNPs4DnYlcy+nFfexNiOPzYVwFW6MWaBwdpAiM?= =?us-ascii?Q?/inSmxRRtfiaVfjoJnGCqc1rS6oJoHeXPOh0Cgd5e6dlTo66gWR2gbYD8/hN?= =?us-ascii?Q?CbvjLlE/HhFOzz8dPEI4AkLXhdUdOOgTQ7JHi93cuaxpNrcN1GAYQYo5zxnW?= =?us-ascii?Q?xSax77vMg1fciXDvLgoCjxos+eNsz3bl0ByrrTzo0tnqIcsbnSP98jcYJteo?= =?us-ascii?Q?3uFWp2at5bTb3tL4aXSDjNs11bPSgverjrqG/WefLEuBuj5AOrZfNHBwb9fe?= =?us-ascii?Q?1mTzoC0eRD/OczaVQTRWr6VqNsEqZUoVd+jUFQhaClo6Ur4K8s6BGGAaGXRb?= =?us-ascii?Q?8ZdQiiClMcFxs7MnlGSVsb62i56UsGLwWyBQc43cSR2Eg59Sn3HtEx213vM3?= =?us-ascii?Q?Z3Excum8WZuIesaj9wM2KMej8ljS57vXRBvqFDPOjA=3D=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SA2PR11MB4844.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230037)(366013)(376011)(1800799021);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?xP5c6VcXt4Fb70Lsml9edF5IQ7LWa7qaaIhl/Y5rPqELaqpRXAwFE86rRasm?= =?us-ascii?Q?rxo3b6LEPNlBo/aTeDyM10xFIGHkXBWgFYmnRo7MQSronL/l3JJzWnORTz2G?= =?us-ascii?Q?6JcPGbGbuIGlU4ulJms3U90hnQrZw6T16f3/MAtZPn2aYToBK3aIIU0f/3Jr?= =?us-ascii?Q?zhBMYZo6YwIa5x22WcGQ3WoVH3+g/UdkIxcCkl3UEN0kK9JVvW/efilt4saO?= =?us-ascii?Q?SlfPC8MuOE2E+IO9n/JJMOdAaUqPa1ag5WIBasGUXAxl3FdgrO0kmikbyTkL?= =?us-ascii?Q?6F6WXA3Clmzl9P84uiwkkzR5KDMla2FYJi7qtCugUt8RRO80gHR9bigwZvEB?= =?us-ascii?Q?wGSMeXUVv2UvDjwhuK9/GK19qa6Ty6IyZ68ww/6Q6ez+nKFHyEyuF5lJ6B3Q?= =?us-ascii?Q?4umTXz+d1n3CcMBQELC67prK5XQRiImncKPLJtAlKXJZ7jfYd4xJfmh9LckF?= =?us-ascii?Q?vLb8B2KlueL+5pEA+WFfeAGkCAgoNciowQ287lbd779jbHSqhkuARYJ9rO/0?= =?us-ascii?Q?ziLwILPe4ye4oyGeGGgY69/W+tUPGL+3YbfUppjQfw6nXSrv1PhguK1vVrRY?= =?us-ascii?Q?j2YFBSAaLSg0iKRc57/CtbsqRibpfUhJYgKAx8G9n4K0fc4CDKoU2CMnI4w4?= =?us-ascii?Q?mgUac3PeZIP74QUhzuo5M7/F8CP3DMkNRbOIY5gioY6gd6RWNAi65n628lo6?= =?us-ascii?Q?xXAG+3agLvF4/J9nZOMoBMrX1y6urjHRkanJ0eElITuWG7PSPt9ByM0G9N22?= =?us-ascii?Q?uUZ87ZhUWf/bUNlAKzk51sjHGZbEWy3pYF64zurhvsIVsfesXxlG57VV8EVR?= =?us-ascii?Q?5zhr9DmRLZvd6Tz8KfbcVzwzIWYy7gJEHp9b5MLzMuhXV3CNCW7a+BmwHfH7?= =?us-ascii?Q?uFfYC9ioCFbRNW5JEwB8wmiJuucyMmJgpnFxLY4ki+dPmqxq72ZUN4lGELtU?= =?us-ascii?Q?+CxrXbi6+lkmXtONUJcw/AuiO1e5Rh8SqGvMNxbJK95wb0HOgUppgpzExXPa?= =?us-ascii?Q?n2C5ZBI7FDcuVSPu8BQKhj0ncAbk8fdFk30cwtAvDjs+RGJDN3cx37fexRTV?= =?us-ascii?Q?Eq3Mk79qEXxTcAs0EBLpXLJs8+V6L5Pbaa6/a9UG1u2VY7LA1aSUIaV5u/w8?= =?us-ascii?Q?oZDTwEe3oelqheIW1eLUCnPWRnb35e9X1YcfxdDzNEEyb6WLrEDOvWxVKyWH?= =?us-ascii?Q?vX1DXJYhQnuNfTNnelwK9wab3JYQaDfDOhhhdMh1cIfWDWfbshtepZJCHcgf?= =?us-ascii?Q?y6LsHyCgeCMTqWiNX7/MBmCUnD6183hb8iuLOwyxmuKPXcIVRfpxEy4uyXDu?= =?us-ascii?Q?XFI8cxATmaVROnOFVA+q/PeG6dmQTB5WP7cusJER9V88Cia/7qehaq2D/XJd?= =?us-ascii?Q?oONqJoZL68OwfaM0BpQd4x+D3xQ6OPF9noDX6NB+aVVpgll5MFWA8VbHlChH?= =?us-ascii?Q?At07UouREQh5jTGhfHiROyF4kPhkpAT92iXGWG63Ve20eKNilCTZNvXDO8+b?= =?us-ascii?Q?5Wi66HsBhRWXw6mg9yoK7SPuBWR15tjtX52Ft2sZyXw0Zdkgb74965kcwQIz?= =?us-ascii?Q?SFDUCfQEBRhUZGTKb+5PvXfMn9oA9TG//8aWA5sp?= X-MS-Exchange-CrossTenant-Network-Message-Id: 4287253b-5bf4-4603-ac11-08dc94bc9fe3 X-MS-Exchange-CrossTenant-AuthSource: SA2PR11MB4844.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Jun 2024 02:15:03.8636 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 7mLP29pRZSYJFkokU5sGwYM1p0fNfHSb1a5H0mf90hCim84TU98VNbQVL1rw9HQrNzCtodhdpjf6SM1P0kwR7g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR11MB7868 X-OriginatorOrg: intel.com Hi Andrey, Greeting! There is BUG: MAX_LOCKDEP_KEYS too low! in v6.10-rc5 kernel. All detailed info: https://github.com/xupengfe/syzkaller_logs/tree/main/240624_120854__MAX_LOCKDEP_KEYS_too_low Syzkaller reproduced code: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/repro.c Syzkaller syscall repro steps: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/repro.prog Mount img: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/mount_0.gz Syzkaller report: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/repro.report Kconfig(make olddefconfig): https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/kconfig_origin Bisect info: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/bisect_info.log v6.10-rc5 dmesg: https://github.com/xupengfe/syzkaller_logs/blob/main/240624_120854__MAX_LOCKDEP_KEYS_too_low/f2661062f16b2de5d7b6a5c42a9a5c96326b8454_dmesg.log Bisected and found related commit: cc478e0b6bdf kasan: avoid resetting aux_lock " [ 157.974013] BUG: MAX_LOCKDEP_KEYS too low! [ 157.974233] turning off the locking correctness validator. [ 157.974459] CPU: 1 PID: 736 Comm: repro Tainted: G W 6.10.0-rc5-f2661062f16b+ #1 [ 157.974864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 [ 157.975392] Call Trace: [ 157.975502] [ 157.975600] dump_stack_lvl+0xea/0x150 [ 157.975786] dump_stack+0x19/0x20 [ 157.975937] register_lock_class+0xaee/0x10d0 [ 157.976136] ? __pfx_register_lock_class+0x10/0x10 [ 157.976351] ? __pfx_mark_lock.part.0+0x10/0x10 [ 157.976553] __lock_acquire+0xfe/0x5ca0 [ 157.976727] ? __pfx_mark_lock.part.0+0x10/0x10 [ 157.976929] ? __pfx_register_lock_class+0x10/0x10 [ 157.977140] ? __kasan_check_read+0x15/0x20 [ 157.977325] ? __pfx___lock_acquire+0x10/0x10 [ 157.977517] ? __kasan_check_read+0x15/0x20 [ 157.977696] ? mark_lock.part.0+0xf3/0x17a0 [ 157.977878] ? __kasan_check_read+0x15/0x20 [ 157.978059] lock_acquire+0x1ce/0x580 [ 157.978221] ? touch_wq_lockdep_map+0x75/0x130 [ 157.978416] ? register_lock_class+0xbf/0x10d0 [ 157.978610] ? __pfx_lock_acquire+0x10/0x10 [ 157.978794] ? __pfx_register_lock_class+0x10/0x10 [ 157.979000] ? lockdep_init_map_type+0x2df/0x810 [ 157.979201] ? lockdep_init_map_type+0x2df/0x810 [ 157.979403] ? touch_wq_lockdep_map+0x75/0x130 [ 157.979598] touch_wq_lockdep_map+0x8a/0x130 [ 157.979786] ? touch_wq_lockdep_map+0x75/0x130 [ 157.979988] __flush_workqueue+0xfd/0x1040 [ 157.980164] ? __this_cpu_preempt_check+0x21/0x30 [ 157.980370] ? lock_release+0x418/0x840 [ 157.980542] ? __pfx___flush_workqueue+0x10/0x10 [ 157.980745] ? __mutex_unlock_slowpath+0x16f/0x630 [ 157.980979] ? xfs_log_force+0x1db/0xa30 [ 157.981191] ? sync_filesystem+0x1e5/0x2a0 [ 157.981386] xlog_cil_push_now.isra.0+0x6c/0x210 [ 157.981588] xlog_cil_force_seq+0x1d4/0x790 [ 157.981775] ? __pfx_xlog_cil_force_seq+0x10/0x10 [ 157.981982] ? xfs_fs_sync_fs+0x1ed/0x3a0 [ 157.982157] ? debug_smp_processor_id+0x20/0x30 [ 157.982358] ? rcu_is_watching+0x19/0xc0 [ 157.982532] ? __sanitizer_cov_trace_const_cmp1+0x1e/0x30 [ 157.982767] ? sync_filesystem+0x1e5/0x2a0 [ 157.982944] xfs_log_force+0x1db/0xa30 [ 157.983109] ? sync_filesystem+0x1e5/0x2a0 [ 157.983287] ? sync_filesystem+0x1e5/0x2a0 [ 157.983464] xfs_fs_sync_fs+0x1ed/0x3a0 [ 157.983632] ? __pfx_xfs_fs_sync_fs+0x10/0x10 [ 157.983821] sync_filesystem+0x1e5/0x2a0 [ 157.983990] generic_shutdown_super+0x8c/0x520 [ 157.984183] kill_block_super+0x45/0xa0 [ 157.984349] xfs_kill_sb+0x1e/0x60 [ 157.984498] deactivate_locked_super+0xcb/0x1c0 [ 157.984694] deactivate_super+0xc0/0xe0 [ 157.984865] cleanup_mnt+0x2fc/0x460 [ 157.985023] __cleanup_mnt+0x1f/0x30 [ 157.985179] task_work_run+0x19c/0x2b0 [ 157.985343] ? __pfx_task_work_run+0x10/0x10 [ 157.985528] ? __this_cpu_preempt_check+0x21/0x30 [ 157.985734] ? syscall_exit_to_user_mode+0x109/0x200 [ 157.985951] syscall_exit_to_user_mode+0x1ec/0x200 [ 157.986160] do_syscall_64+0x79/0x140 [ 157.986322] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 157.986536] RIP: 0033:0x7fab3634e87b [ 157.986692] Code: 0f 1e fa 48 89 fe 31 ff e9 72 08 00 00 66 90 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 71 b5 0a 00 f7 d8 [ 157.987430] RSP: 002b:00007ffc181e2598 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 157.987742] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fab3634e87b [ 157.988031] RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffc181e2640 [ 157.988321] RBP: 00007ffc181e3680 R08: 0000000000000000 R09: 00007ffc181e2430 [ 157.988611] R10: 00007fab363b13e0 R11: 0000000000000202 R12: 00007ffc181e37f8 [ 157.988761] XFS (loop7): Ending clean mount [ 157.988901] R13: 0000000000403138 R14: 000000000040fe08 R15: 00007fab36460000 [ 157.989407] " I hope it's helpful. Thanks! --- If you don't need the following environment to reproduce the problem or if you already have one reproduced environment, please ignore the following information. How to reproduce: git clone https://gitlab.com/xupengfe/repro_vm_env.git cd repro_vm_env tar -xvf repro_vm_env.tar.gz cd repro_vm_env; ./start3.sh // it needs qemu-system-x86_64 and I used v7.1.0 // start3.sh will load bzImage_2241ab53cbb5cdb08a6b2d4688feb13971058f65 v6.2-rc5 kernel // You could change the bzImage_xxx as you want // Maybe you need to remove line "-drive if=pflash,format=raw,readonly=on,file=./OVMF_CODE.fd \" for different qemu version You could use below command to log in, there is no password for root. ssh -p 10023 root@localhost After login vm(virtual machine) successfully, you could transfer reproduced binary to the vm by below way, and reproduce the problem in vm: gcc -pthread -o repro repro.c scp -P 10023 repro root@localhost:/root/ Get the bzImage for target kernel: Please use target kconfig and copy it to kernel_src/.config make olddefconfig make -jx bzImage //x should equal or less than cpu num your pc has Fill the bzImage file into above start3.sh to load the target kernel in vm. Tips: If you already have qemu-system-x86_64, please ignore below info. If you want to install qemu v7.1.0 version: git clone https://github.com/qemu/qemu.git cd qemu git checkout -f v7.1.0 mkdir build cd build yum install -y ninja-build.x86_64 yum -y install libslirp-devel.x86_64 ../configure --target-list=x86_64-softmmu --enable-kvm --enable-vnc --enable-gtk --enable-sdl --enable-usb-redir --enable-slirp make make install Best Regards, Thanks!