From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) (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 C9BEE14E2E2 for ; Tue, 17 Jun 2025 05:15:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=192.198.163.11 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750137343; cv=fail; b=fy0z0z8UfTu2Iwhx6DT1WRU0NoPD5EoCP+ZQagmKcewKRmNmLbdUZMDZ6OnkgFJzrDYIsT9D4//lGLoAotry7btXkmnRquaBRN0Ete/BSfFi5AU44r7LYWik4jNrhUv6Nrl/OyfA3zBfma8UHakGghG9xd12NOXIFJPx6nP4vW8= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750137343; c=relaxed/simple; bh=RoLjR6AkpOkTudT6xPc8geCcJ/JLyMvvxnPIOOdgKk4=; h=Date:From:To:CC:Subject:Message-ID:Content-Type: Content-Disposition:MIME-Version; b=D9grnrmQZIZ88qO/BtPgW3l+abJcjFzF39RuXXXI9ioY7Q4DlLZF+SbnnXL2vMwtrBA8xK6SO/uwKvi2JZiDqcRFCeJOomhmvohMMSjA91fSwTE4BXtkfC/E/ugTx+/7P+bLvQej4/ely32T89n50BWio4U06sx8i/Lc6iIyYec= 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=mrtGr3UC; arc=fail smtp.client-ip=192.198.163.11 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="mrtGr3UC" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1750137341; x=1781673341; h=date:from:to:cc:subject:message-id:mime-version; bh=RoLjR6AkpOkTudT6xPc8geCcJ/JLyMvvxnPIOOdgKk4=; b=mrtGr3UCLqGo3QQaIketmVcU2LhGdA5iBn5EMzaDQ9RrigiKu+YdZlxV DMG0SYtoCAYPEGXv571h+O8qbuHDJG8oFzq9u3CUmTFAZCJqsDZKJznFt P6larullXePqDCFDCkCZw4klI4zcfyPabk3xtUaKTLoWMkDfBZLNaUcqo 5SNN+vT0QPbnm9TGbzTT1tGAWZ/u5S5Mzr71Gnw4/YA2TXdnBBQaqoMeG LCospjXaoKC3ZcIJXWA+O3bqPHyj2hIq4USc1HDc92tyRtuIk0A8NlHC3 NsYXmycsLdMRdCzMTHoRqyPO/J8pcH/31CucQ5MzjWKJmhbUcnqgEu6EM A==; X-CSE-ConnectionGUID: aSjKZSg8Qu6JlLbxdNsxzA== X-CSE-MsgGUID: B3sAvBUlSU26hRJ0cJKVdg== X-IronPort-AV: E=McAfee;i="6800,10657,11465"; a="62903776" X-IronPort-AV: E=Sophos;i="6.16,242,1744095600"; d="scan'208";a="62903776" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jun 2025 22:15:40 -0700 X-CSE-ConnectionGUID: aFW09GZZR+uSzvR6koafLQ== X-CSE-MsgGUID: +5QL1ka7RP+w8zXOUV+sMw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,242,1744095600"; d="scan'208";a="148570586" Received: from orsmsx901.amr.corp.intel.com ([10.22.229.23]) by orviesa010.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jun 2025 22:15:40 -0700 Received: from ORSMSX901.amr.corp.intel.com (10.22.229.23) by ORSMSX901.amr.corp.intel.com (10.22.229.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.25; Mon, 16 Jun 2025 22:15:39 -0700 Received: from ORSEDG901.ED.cps.intel.com (10.7.248.11) by ORSMSX901.amr.corp.intel.com (10.22.229.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.25 via Frontend Transport; Mon, 16 Jun 2025 22:15:39 -0700 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (40.107.236.63) by edgegateway.intel.com (134.134.137.111) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.25; Mon, 16 Jun 2025 22:15:38 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=xNqRjZHAVh/oNg5zPMaqlI2BB2ehTVo1My6uF6XhODivKuZx8fZ+0Xj4A1Ah6NeofGARDl4+jaSpnrcMvm2nF8QN7CBwULrbEeyMuuP/kvQVHxdf1JA8ICwu3TG2A2n3O/2F3tBay/qDtLAIff31fBowyANHHAyLL0KeUmmkkamNpZe32ppXfpATuazQsNSu00fGmqVFlzUZIJh2nYZVhYKqJAlSXYS83qLFWNl377HXGoXbLhKz9ng+Nq8W18f0SOCXH4NKZNIi5r3iSM9YV5Du5Ghmh6IhGXbA5U62NYR57L9PXHK+O/21anYoidgLBzkLvaCpSdh3wNBWyGj6nw== 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=tMVSP/h8vhDturtNUHEraNhA7Au27KkvVoraxF1+xPg=; b=GIILzziB/ULUSyQDhzDKdGLAWltHHn7ztRlgw6ybcwJ3lL6M8O09PD1pnGHMRThKrqdW5FijT4V+CFj4bmWFevNzsS5nhqpA8ofI9Eu5biJW+EPM4+rAfsLmycGUDV4t5yYHIOqOiTR3B9hiqZMTW3WAlEQugaXzWnQIH/TWfxh/Q/KztfH5b3fkefBidQkbMM1jPCB2GC9pJ1QcQR2jBYR+YtWhfbt4KQkIVcB3M0Mxr2DcN8L3nsy1AW8SH5vZ37P4h233ouGIisojeHoSBnHWMVmqu+sACGoKbeavQLgHqqe5yNOLtZ6c4JBn8D+X9VNeb2fs0+76yxYAewzwoA== 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 LV3PR11MB8603.namprd11.prod.outlook.com (2603:10b6:408:1b6::9) by IA0PR11MB7284.namprd11.prod.outlook.com (2603:10b6:208:438::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8835.28; Tue, 17 Jun 2025 05:15:09 +0000 Received: from LV3PR11MB8603.namprd11.prod.outlook.com ([fe80::4622:29cf:32b:7e5c]) by LV3PR11MB8603.namprd11.prod.outlook.com ([fe80::4622:29cf:32b:7e5c%3]) with mapi id 15.20.8792.034; Tue, 17 Jun 2025 05:15:09 +0000 Date: Tue, 17 Jun 2025 13:14:58 +0800 From: kernel test robot To: Christian Brauner CC: , , Christian Brauner , , Subject: [brauner-vfs:work.pidfs] [pidfs] 56e50aa99d: WARNING:at_kernel/pid.c:#put_pid Message-ID: <202506171228.578f7de6-lkp@intel.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline X-ClientProxiedBy: KU3P306CA0005.MYSP306.PROD.OUTLOOK.COM (2603:1096:d10:15::14) To LV3PR11MB8603.namprd11.prod.outlook.com (2603:10b6:408:1b6::9) Precedence: bulk X-Mailing-List: oe-lkp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV3PR11MB8603:EE_|IA0PR11MB7284:EE_ X-MS-Office365-Filtering-Correlation-Id: d2ff4785-42ce-4c8b-3844-08ddad5dedbc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|366016; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Pe9csP+OXpO6G4H9VLo+AwwvdLu6CODGB6CDThB14ZOr0g+VT3s/FuYA6A3d?= =?us-ascii?Q?u13IP/DiOxFF1ZNMOsuKxQq6BvC7dmfSdvmYM5TRbsI0fduQMbAZ3QgSp8Ej?= =?us-ascii?Q?h/N5HQ0c+67snPSzkyQ7bMtgOQfRs+ojdvZACq695YquF8yfiQs5Qip67pni?= =?us-ascii?Q?QVsFYd7rMYzFE1Zb2Rlbcu9v9x2bzKuh6NkxR6z6bu+3yKIzAahlxURgLq/v?= =?us-ascii?Q?Hmg3NylWO99uWEpYs1Kwa9AVDdxh9/TY7TaYwDepW+sogjyqqGI5JqJ3XCCQ?= =?us-ascii?Q?COgFbLvWYeXXQ8DebSwJMGrbCtinXIn/HEueTAdTcNJsYoEy1IYmnr1AVyLm?= =?us-ascii?Q?YyJtUOVh6KifG0mGx95O5tMioJacx13+ORB62P+Q4YHaHnDyGkmv//Z5AQAD?= =?us-ascii?Q?xrn9CqKBJG46MXihak1RPXfWgQaCR0ZZ2s0IjvGM4vqa19dZaW8Pyt4rZVs9?= =?us-ascii?Q?5LJl5JmG06H71JUytZKSQMNXK9Poum+R3FTpZuHxmKNlMGoTzNiM5zKWX417?= =?us-ascii?Q?73xLGwAHZMX06tyUqVa/LnXxbqwSHIhDbuHjH5AcPUDbbDqRORaJIdWjcmsb?= =?us-ascii?Q?MfgZoA78ulC03XxYYkZnYc4qgVHZvfgeGZIhz629j0m7QYdTBTzH4n3QliYA?= =?us-ascii?Q?p3Nl6TnswVNz6S7BxKNl5EFwlncGmYEYMOZxHZb0Lv96s+Qp6WFOScAZoAUy?= =?us-ascii?Q?I7IgHpPtJDfzHEQlbnzpjPbtMRgsZD3jQnXvZSpOTGaVBMxDazf7QSiJtq/X?= =?us-ascii?Q?NK/kbU8VWxRflCsoNAEo4K0W9t18tf1mGFlQzxK9pE4SFVVatZ+DnfM/xlu2?= =?us-ascii?Q?PghYXdZxJ9zqPiX5HZRPGHnqEPG9G2essb9Fi1mifu0rL+CgXyrDpIGZhuIg?= =?us-ascii?Q?ZxRDODhJWZV7JRK/mNXtaIHsV324xKDq7hlK1OO4+fiMUZlxmC9jVg6QisRe?= =?us-ascii?Q?4FswBSO9iFiUBdCM0rPextFfgyIgmRu5rxgVPOdel3MhRyF8wqAnrgobwaH9?= =?us-ascii?Q?8yACAA2WnjepWIE6MiGmwY9KzR7pK9FGPit4GjbnXYzvbCCsj2GnJ1HziFo3?= =?us-ascii?Q?8QFr1nx0FDjjjdKylgziW+ubNNwPhgXPSA+91tV4lyoekdEU7nhHg8ccTUPl?= =?us-ascii?Q?aL7XW0gqMUzpVqUxuF+Ig5s/LyLUvCdqRw1QAn+R3wU/UmrelSrX3X0wlnBR?= =?us-ascii?Q?6W3W/WaTDLDwBogBo68gwUTOINa09Got2IG7rtDoYNESxERGUZR14nzTFAUM?= =?us-ascii?Q?nnfU4CprUm7FU6sN7yI7WepopED2Ki0FbYPONSkE8V+8+FT/3eZ29o/wRBjg?= =?us-ascii?Q?CTugbXKGFynASh2cNiGJ843mBWYOXhZ6eEr5ov/uzsb304B1dopw74gKJ3Nt?= =?us-ascii?Q?EIcE71IedMaZw/+38gkWULVPx/xd?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:LV3PR11MB8603.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(376014)(366016);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?2XINZTVV5hRITRWKqOtPjaO2X2HCcWc20aO3IRyvZBSxlWd2TG3FlfXcNBbZ?= =?us-ascii?Q?Bzh6RCjB1u1hY7HHwdvOqutpS93xjf39o2hDJ+mvUdxEAniTTObO+hfNo4ID?= =?us-ascii?Q?LLrDRutW27ICm55q1/fEglVUWco+QmyLpNq+VSekfXlGQzb90QzkXUpcyDQO?= =?us-ascii?Q?6l6OkvOV8T/fk5pQiIWO9uCSVT569zffxqFMF0ltatfaJirVpVD9OtiIhc9A?= =?us-ascii?Q?CfyA2biaM50QRRHIBQ+dCCig9Em5rNDpCP6sWyvp/daW/tjK0QuuD05CRGYE?= =?us-ascii?Q?jGqvpqEqL9rF3MTckz80aTQlZQtYYZ7mzS4dxANFCUh/JfvQpe1uSww3OJhd?= =?us-ascii?Q?SpyeFYRn3hhEtD1q0UztLZl7vZPpumhrTnwgrvB9MnCkNYDoowhfLMfCMGFp?= =?us-ascii?Q?qz8jYleeAoZFQkWjAksqmYY23RchMtaLU35FjVitAXiQozh8dKcow13xAS2h?= =?us-ascii?Q?+zsrz5+5fEgRrTD9RtPP1qI9jAL3lbp+Rf/ksgXvQQD5uhPFPA+9VRs4QIgz?= =?us-ascii?Q?NCNkOZm8+qMc5gh2/zduE9C5aToH/lfUuLSD3dGbLi5gPyd4o869J9AHJ3B3?= =?us-ascii?Q?bnrUmKFHkiGLEf+m3vAWGtdJ1Zjje9/Gwmwddz/6jhyeyv718CMFxtmZ35VM?= =?us-ascii?Q?tpRb2Xzrryn2Qqlzu4PiLEJ7pBb3Ymm62+quIQ4VvlfPvfh2hpqKCs+nakBm?= =?us-ascii?Q?28wk+U4RdarcWxdAxPKoAoqMLl1dPDhrM/3M7ZIdMRC4hacwLeHYK/qXOSL5?= =?us-ascii?Q?9B1kEgg/HzlvNKKb7Mv3iv/we+6+dmB9og6d3GxJF0jap8+nT9yMDUcV3oHN?= =?us-ascii?Q?o3M3CkAQpDBvOY/kWPthyToVNXnfYILDqwvpiESSAAHKHmnmHKePKaryFzlF?= =?us-ascii?Q?HnuRqCeCElPc9iOvxM3Wc/7bpoc+/PQUxbvZ6aYIRmjDS23bj0WK2niDNiFy?= =?us-ascii?Q?3i0FjxkLfMgozBaKtZtzCCGvnzVTFJZcDK7+fDsDOefdgsxzHiyY+yvtcOI+?= =?us-ascii?Q?2WaU3+U4ybN4FfNC3BmO8Bfhzv3AbvuLUJUOXgtAAV8Ymo1RiQlgXYEhHEVo?= =?us-ascii?Q?fIBWvIIxhENpEliQLv/CYOyACZQDi1OWWs6CWTteArxv00/9zyqywFLNpM6+?= =?us-ascii?Q?QrwuyGmUO8YvemRQbjWuMhaP/Qp6zD+1/4ubnQ9+Ww6cQWT/U2DP4jea8VFC?= =?us-ascii?Q?JhzzH4GzHwqVgU6eIXf0h+aIrQVM7SZQNybtdUnTA8fkCyfJirG1eUHm04/w?= =?us-ascii?Q?MxUlMjdw7QDl+ZaNAuuRaE/GP8fbhwp1LjtTGM376fycdgoSbStisUw0U0cT?= =?us-ascii?Q?MGhLNm+FDxHl8XrWC5jZ+7hBRGa8TtohOauAYHRSoZZ+dARpU5DJy0SWRdgA?= =?us-ascii?Q?Kim/FI7m0x76X+C05RdycLrimIpOqDsFxEMF92rZvCED70X+5y0aLSEmub4A?= =?us-ascii?Q?2MWI85WLye6EwZBlQgJpxLQt2EQrsPVYUvbm3DkJbgBytA6HMs5aBVepRsjB?= =?us-ascii?Q?TnnrFQqsLRw6CQEApdh19KXc7eriTI/dTNMnUSVYxUChAykyf2YWRKMys2MP?= =?us-ascii?Q?I90LxuHHj6I47vHyUG3MLxRqsKOBbSdVJ/+JAECV7dE4oYOnaJBJEpdW6K2m?= =?us-ascii?Q?mQ=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: d2ff4785-42ce-4c8b-3844-08ddad5dedbc X-MS-Exchange-CrossTenant-AuthSource: LV3PR11MB8603.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jun 2025 05:15:08.9747 (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: cvT7ONrC2zyxlzT/b56zrzAoOCL6IliBlWejigo9bQz8z7/DgfizDugE5+ZQTPGqz2Z6vVkRYz++mUyuwjF8Mg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR11MB7284 X-OriginatorOrg: intel.com Hello, kernel test robot noticed "WARNING:at_kernel/pid.c:#put_pid" on: commit: 56e50aa99df4ccdc736362bac4e62e2dfc55f58a ("pidfs: keep pidfs dentry stashed once created") https://git.kernel.org/cgit/linux/kernel/git/vfs/vfs.git work.pidfs in testcase: boot config: x86_64-randconfig-161-20250617 compiler: clang-20 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +--------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+------------+ | | v6.16-rc1 | 56e50aa99d | +--------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+------------+ | WARNING:at_kernel/pid.c:#put_pid | 0 | 18 | | RIP:put_pid | 0 | 18 | | RIP:pv_native_safe_halt | 0 | 16 | | WARNING:possible_circular_locking_dependency_detected | 0 | 18 | | WARNING:possible_circular_locking_dependency_detected_systemd_is_trying_to_acquire_lock:at:pidfs_dentry_prune_but_task_is_already_holding_lock:at:dput | 0 | 12 | | WARNING:possible_circular_locking_dependency_detected_S04udev_is_trying_to_acquire_lock:at:pidfs_dentry_prune_but_task_is_already_holding_lock:at:dput | 0 | 6 | +--------------------------------------------------------------------------------------------------------------------------------------------------------+-----------+------------+ If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202506171228.578f7de6-lkp@intel.com [ 8.810471][ C0] ------------[ cut here ]------------ [ 8.813523][ C0] WARNING: CPU: 0 PID: 1 at kernel/pid.c:103 put_pid (kernel/pid.c:103 (discriminator 12)) [ 8.816825][ C0] Modules linked in: [ 8.820235][ C0] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.16.0-rc1-00001-g56e50aa99df4 #1 NONE 47b83492c05af33e69456fb6bcdb41d4f4e07a6e [ 8.823518][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 8.826880][ C0] RIP: 0010:put_pid (kernel/pid.c:103 (discriminator 12)) [ 8.830249][ C0] Code: ae b6 4c 00 eb 0e e8 27 15 22 00 eb 07 7c 1f e8 1e 15 22 00 5b 41 5c 41 5e 41 5f 5d 31 c0 31 c9 31 ff 31 f6 c3 e8 08 15 22 00 <0f> 0b eb b1 e8 ff 14 22 00 48 89 df be 03 00 00 00 e8 32 17 a6 00 All code ======== 0: ae scas %es:(%rdi),%al 1: b6 4c mov $0x4c,%dh 3: 00 eb add %ch,%bl 5: 0e (bad) 6: e8 27 15 22 00 call 0x221532 b: eb 07 jmp 0x14 d: 7c 1f jl 0x2e f: e8 1e 15 22 00 call 0x221532 14: 5b pop %rbx 15: 41 5c pop %r12 17: 41 5e pop %r14 19: 41 5f pop %r15 1b: 5d pop %rbp 1c: 31 c0 xor %eax,%eax 1e: 31 c9 xor %ecx,%ecx 20: 31 ff xor %edi,%edi 22: 31 f6 xor %esi,%esi 24: c3 ret 25: e8 08 15 22 00 call 0x221532 2a:* 0f 0b ud2 <-- trapping instruction 2c: eb b1 jmp 0xffffffffffffffdf 2e: e8 ff 14 22 00 call 0x221532 33: 48 89 df mov %rbx,%rdi 36: be 03 00 00 00 mov $0x3,%esi 3b: e8 32 17 a6 00 call 0xa61772 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: eb b1 jmp 0xffffffffffffffb5 4: e8 ff 14 22 00 call 0x221508 9: 48 89 df mov %rbx,%rdi c: be 03 00 00 00 mov $0x3,%esi 11: e8 32 17 a6 00 call 0xa61748 [ 8.833608][ C0] RSP: 0000:ffffc90000007d30 EFLAGS: 00010246 [ 8.836857][ C0] RAX: 0000000000000000 RBX: ffff88810097b680 RCX: 0000000000000000 [ 8.840191][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 8.843543][ C0] RBP: ffffc90000007d50 R08: 0000000000000000 R09: 0000000000000000 [ 8.846866][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 8.850184][ C0] R13: ffffffff815def00 R14: ffffffff85109e00 R15: ffff88810097b6d0 [ 8.853572][ C0] FS: 0000000000000000(0000) GS:ffff888428b69000(0000) knlGS:0000000000000000 [ 8.856838][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 8.860167][ C0] CR2: ffff88843ffff000 CR3: 0000000005075000 CR4: 00000000000406b0 [ 8.863517][ C0] Call Trace: [ 8.864777][ C0] [ 8.865686][ C0] ? rcu_do_batch (kernel/rcu/tree.c:?) [ 8.866882][ C0] delayed_put_pid (kernel/pid.c:114) [ 8.870176][ C0] rcu_do_batch (include/linux/rcupdate.h:341 (discriminator 1) kernel/rcu/tree.c:2578 (discriminator 1)) [ 8.873601][ C0] rcu_core (kernel/rcu/tree.c:2834) [ 8.876884][ C0] rcu_core_si (kernel/rcu/tree.c:2850) [ 8.880198][ C0] handle_softirqs (arch/x86/include/asm/jump_label.h:36 include/trace/events/irq.h:142 kernel/softirq.c:580) [ 8.883559][ C0] __irq_exit_rcu (arch/x86/include/asm/jump_label.h:36 kernel/softirq.c:682) [ 8.886442][ C0] irq_exit_rcu (kernel/softirq.c:698 (discriminator 5)) [ 8.886885][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 (discriminator 24)) [ 8.890222][ C0] [ 8.893537][ C0] [ 8.896593][ C0] asm_sysvec_apic_timer_interrupt (arch/x86/include/asm/idtentry.h:702) [ 8.896859][ C0] RIP: 0010:__pageblock_pfn_to_page (include/linux/mm.h:1512 include/linux/mm.h:1733 mm/page_alloc.c:1516) [ 8.900183][ C0] Code: 3c 20 00 74 0c 48 c7 c7 20 23 e6 84 e8 9a ca 06 00 48 c1 e3 06 48 03 1d 6f fa 3c 03 74 61 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 df e8 77 ca 06 00 4c 8b 2b 4c 89 e8 48 c1 e8 36 4c 8d All code ======== 0: 3c 20 cmp $0x20,%al 2: 00 74 0c 48 add %dh,0x48(%rsp,%rcx,1) 6: c7 c7 20 23 e6 84 mov $0x84e62320,%edi c: e8 9a ca 06 00 call 0x6caab 11: 48 c1 e3 06 shl $0x6,%rbx 15: 48 03 1d 6f fa 3c 03 add 0x33cfa6f(%rip),%rbx # 0x33cfa8b 1c: 74 61 je 0x7f 1e: 48 89 d8 mov %rbx,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 2a:* 74 08 je 0x34 <-- trapping instruction 2c: 48 89 df mov %rbx,%rdi 2f: e8 77 ca 06 00 call 0x6caab 34: 4c 8b 2b mov (%rbx),%r13 37: 4c 89 e8 mov %r13,%rax 3a: 48 c1 e8 36 shr $0x36,%rax 3e: 4c rex.WR 3f: 8d .byte 0x8d Code starting with the faulting instruction =========================================== 0: 74 08 je 0xa 2: 48 89 df mov %rbx,%rdi 5: e8 77 ca 06 00 call 0x6ca81 a: 4c 8b 2b mov (%rbx),%r13 d: 4c 89 e8 mov %r13,%rax 10: 48 c1 e8 36 shr $0x36,%rax 14: 4c rex.WR 15: 8d .byte 0x8d [ 8.903639][ C0] RSP: 0000:ffffc9000001fe20 EFLAGS: 00000246 [ 8.906853][ C0] RAX: 1ffffd4001f4c000 RBX: ffffea000fa60000 RCX: 0000000000000000 [ 8.910185][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 8.913478][ C0] RBP: ffffc9000001fe48 R08: 0000000000000000 R09: 0000000000000000 [ 8.916227][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 8.916886][ C0] R13: 0000000000440000 R14: 00000000003e99ff R15: ffff88843ffd32c0 [ 8.920289][ C0] set_zone_contiguous (mm/mm_init.c:2340) [ 8.923614][ C0] page_alloc_init_late (mm/mm_init.c:?) [ 8.926911][ C0] kernel_init_freeable (init/main.c:1583) [ 8.930180][ C0] ? rest_init (init/main.c:1465) [ 8.933549][ C0] kernel_init (init/main.c:1475) [ 8.936647][ C0] ? rest_init (init/main.c:1465) [ 8.936860][ C0] ret_from_fork (arch/x86/kernel/process.c:154) [ 8.940091][ C0] ? rest_init (init/main.c:1465) [ 8.943087][ C0] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) [ 8.943574][ C0] [ 8.946853][ C0] irq event stamp: 3236 [ 8.950200][ C0] hardirqs last enabled at (3246): __console_unlock (arch/x86/include/asm/irqflags.h:19 arch/x86/include/asm/irqflags.h:109 arch/x86/include/asm/irqflags.h:151 kernel/printk/printk.c:344 kernel/printk/printk.c:2885) [ 8.953563][ C0] hardirqs last disabled at (3255): __console_unlock (kernel/printk/printk.c:342 (discriminator 9)) [ 8.956893][ C0] softirqs last enabled at (2734): handle_softirqs (arch/x86/include/asm/preempt.h:27 kernel/softirq.c:426 kernel/softirq.c:607) [ 8.960161][ C0] softirqs last disabled at (2737): __irq_exit_rcu (arch/x86/include/asm/jump_label.h:36 kernel/softirq.c:682) [ 8.963143][ C0] ---[ end trace 0000000000000000 ]--- ... [ 64.023435][ T1] [ 64.023863][ T1] ====================================================== [ 64.024924][ T1] WARNING: possible circular locking dependency detected [ 64.025966][ T1] 6.16.0-rc1-00001-g56e50aa99df4 #1 Tainted: G W [ 64.027155][ T1] ------------------------------------------------------ [ 64.028213][ T1] systemd/1 is trying to acquire lock: [ 64.029076][ T1] ffff888130098fb8 (&pid->wait_pidfd){....}-{3:3}, at: pidfs_dentry_prune+0x9d/0x100 [ 64.030543][ T1] [ 64.030543][ T1] but task is already holding lock: [ 64.031674][ T1] ffff88812e7fe880 (&lockref->lock){+.+.}-{3:3}, at: dput+0x212/0x600 [ 64.032976][ T1] [ 64.032976][ T1] which lock already depends on the new lock. [ 64.032976][ T1] [ 64.034554][ T1] [ 64.034554][ T1] the existing dependency chain (in reverse order) is: [ 64.035902][ T1] [ 64.035902][ T1] -> #1 (&lockref->lock){+.+.}-{3:3}: [ 64.037079][ T1] _raw_spin_lock+0x39/0x80 [ 64.037857][ T1] lockref_get+0x15/0x80 [ 64.038597][ T1] pidfs_stash_dentry+0xa8/0x140 [ 64.039437][ T1] path_from_stashed+0x445/0x800 [ 64.040277][ T1] pidfs_register_pid+0x92/0x140 [ 64.041088][ T1] unix_socketpair+0xd8/0x600 [ 64.041863][ T1] __sys_socketpair+0x23b/0x380 [ 64.042681][ T1] __x64_sys_socketpair+0xa0/0xc0 [ 64.043521][ T1] x64_sys_call+0xc56/0xe40 [ 64.044286][ T1] do_syscall_64+0x76/0x280 [ 64.045060][ T1] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 64.046011][ T1] [ 64.046011][ T1] -> #0 (&pid->wait_pidfd){....}-{3:3}: [ 64.047203][ T1] __lock_acquire+0x1580/0x2d00 [ 64.048036][ T1] lock_acquire+0xf4/0x280 [ 64.048812][ T1] _raw_spin_lock_irq+0x64/0xc0 [ 64.049627][ T1] pidfs_dentry_prune+0x9d/0x100 [ 64.050472][ T1] __dentry_kill+0x9b/0x540 [ 64.051272][ T1] dput+0x3bf/0x600 [ 64.051946][ T1] pidfs_put_pid+0x58/0x80 [ 64.052730][ T1] unix_sock_destructor+0x95/0x200 [ 64.053613][ T1] __sk_destruct+0x58/0x640 [ 64.054398][ T1] sk_destruct+0x9a/0x100 [ 64.055150][ T1] __sk_free+0x1bf/0x2c0 [ 64.055891][ T1] sk_free+0x47/0x80 [ 64.056799][ T1] unix_release_sock+0x5ec/0x800 [ 64.057635][ T1] unix_release+0x91/0xc0 [ 64.058372][ T1] __sock_release+0xca/0x280 [ 64.059171][ T1] sock_close+0x21/0x40 [ 64.059897][ T1] __fput+0x355/0x8c0 [ 64.060593][ T1] fput_close_sync+0xa4/0x140 [ 64.061374][ T1] __se_sys_close+0x67/0x100 [ 64.062173][ T1] __x64_sys_close+0x3d/0x80 [ 64.062951][ T1] x64_sys_call+0x66/0xe40 [ 64.063711][ T1] do_syscall_64+0x76/0x280 [ 64.064506][ T1] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 64.065471][ T1] [ 64.065471][ T1] other info that might help us debug this: [ 64.065471][ T1] [ 64.066954][ T1] Possible unsafe locking scenario: [ 64.066954][ T1] [ 64.068079][ T1] CPU0 CPU1 [ 64.068899][ T1] ---- ---- [ 64.069714][ T1] lock(&lockref->lock); [ 64.070401][ T1] lock(&pid->wait_pidfd); [ 64.071479][ T1] lock(&lockref->lock); [ 64.072521][ T1] lock(&pid->wait_pidfd); [ 64.072891][ T1] [ 64.072891][ T1] *** DEADLOCK *** [ 64.072891][ T1] [ 64.073520][ T1] 3 locks held by systemd/1: [ 64.073888][ T1] #0: ffff88812e7b2018 (&sb->s_type->i_mutex_key#9){+.+.}-{4:4}, at: __sock_release+0x9c/0x280 [ 64.074728][ T1] #1: ffff88812e7fe880 (&lockref->lock){+.+.}-{3:3}, at: dput+0x212/0x600 [ 64.075416][ T1] #2: ffff888100418bb0 (&sb->s_type->i_lock_key#4){+.+.}-{3:3}, at: lock_for_kill+0x83/0x200 [ 64.076230][ T1] [ 64.076230][ T1] stack backtrace: [ 64.076721][ T1] CPU: 0 UID: 0 PID: 1 Comm: systemd Tainted: G W 6.16.0-rc1-00001-g56e50aa99df4 #1 NONE 47b83492c05af33e69456fb6bcdb41d4f4e07a6e [ 64.076734][ T1] Tainted: [W]=WARN [ 64.076737][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 64.076743][ T1] Call Trace: [ 64.076748][ T1] [ 64.076753][ T1] __dump_stack+0x21/0x40 [ 64.076761][ T1] dump_stack_lvl+0xcd/0x180 [ 64.076768][ T1] dump_stack+0x15/0x40 [ 64.076773][ T1] print_circular_bug+0x300/0x340 [ 64.076786][ T1] check_noncircular+0x121/0x140 [ 64.076797][ T1] __lock_acquire+0x1580/0x2d00 [ 64.076812][ T1] lock_acquire+0xf4/0x280 [ 64.076821][ T1] ? pidfs_dentry_prune+0x9d/0x100 [ 64.076833][ T1] ? trace_irq_disable+0x65/0x1c0 [ 64.076839][ T1] ? _raw_spin_lock_irq+0x3c/0xc0 [ 64.076849][ T1] ? pidfs_dentry_prune+0x9d/0x100 [ 64.076858][ T1] _raw_spin_lock_irq+0x64/0xc0 [ 64.076865][ T1] ? pidfs_dentry_prune+0x9d/0x100 [ 64.076875][ T1] pidfs_dentry_prune+0x9d/0x100 [ 64.076884][ T1] __dentry_kill+0x9b/0x540 [ 64.076893][ T1] dput+0x3bf/0x600 [ 64.076901][ T1] ? dput+0x42/0x600 [ 64.076909][ T1] pidfs_put_pid+0x58/0x80 [ 64.076918][ T1] unix_sock_destructor+0x95/0x200 [ 64.076926][ T1] ? unix_write_space+0x400/0x400 [ 64.076933][ T1] __sk_destruct+0x58/0x640 [ 64.076944][ T1] sk_destruct+0x9a/0x100 [ 64.076952][ T1] __sk_free+0x1bf/0x2c0 [ 64.076961][ T1] sk_free+0x47/0x80 [ 64.076970][ T1] unix_release_sock+0x5ec/0x800 [ 64.076978][ T1] unix_release+0x91/0xc0 [ 64.076985][ T1] __sock_release+0xca/0x280 [ 64.076994][ T1] ? sock_mmap+0xc0/0xc0 [ 64.077001][ T1] sock_close+0x21/0x40 [ 64.077009][ T1] __fput+0x355/0x8c0 [ 64.077020][ T1] fput_close_sync+0xa4/0x140 [ 64.077029][ T1] __se_sys_close+0x67/0x100 [ 64.077035][ T1] ? entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 64.077042][ T1] __x64_sys_close+0x3d/0x80 [ 64.077048][ T1] x64_sys_call+0x66/0xe40 [ 64.077054][ T1] do_syscall_64+0x76/0x280 [ 64.077061][ T1] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 64.077068][ T1] RIP: 0033:0x7f8f004aa8e0 [ 64.077075][ T1] Code: 0d 00 00 00 eb b2 e8 ff f7 01 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 80 3d 01 1d 0e 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c [ 64.077081][ T1] RSP: 002b:00007ffdcfd48558 EFLAGS: 00000202 ORIG_RAX: 0000000000000003 [ 64.077088][ T1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8f004aa8e0 [ 64.077093][ T1] RDX: 0000563b305c8bfa RSI: 0000000000000003 RDI: 0000000000000003 [ 64.077097][ T1] RBP: 00007f8eff9447f0 R08: 0000000000000007 R09: 0000563e53b9a710 [ 64.077102][ T1] R10: f07149c8a2714e9d R11: 0000000000000202 R12: 0000000000000002 [ 64.077106][ T1] R13: 00007ffdcfd485d8 R14: 0000563e53a8e870 R15: 0000000000000000 [ 64.077114][ T1] The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250617/202506171228.578f7de6-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki