From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (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 5F28F2E22B5 for ; Mon, 8 Sep 2025 06:52:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=192.198.163.18 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757314372; cv=fail; b=HhBukSR3a7PIxOVNFQN0nr2xHRJI8bfmph/CELEHCxADUmK9fxRkFJA7PAzpaCvrNqfExR7gPPDk9mR9fbZcZPQ+CpBw/cx3UW2qr48m8QUlpd6vqOrvIgt07+xmiLzzntoPre+nxC1YuCqPeDTB+AVDpARLcIXMynpvmerKi/8= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757314372; c=relaxed/simple; bh=4Eeqj2k1DIK0c3JHPAR/OsYQ4uYJDfFWYBlctf3rXWM=; h=Date:From:To:CC:Subject:Message-ID:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=OHP7OnxDudHNQoc7BifWe8XEEU5aPSvfkdtYQFXuHXAoxRYb3t9tG+tVMHeFLFR1TtoMGyr/akS5WOtx2pqg8tVvrXF/SBk/2Jnf33zCjrB39oFbYyxRlMpdja0OxTwKTFsEGjoBI3bTZJD+TtgqLNDZsiclFPvysNn5SJDcUeE= 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=DffdilQ1; arc=fail smtp.client-ip=192.198.163.18 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="DffdilQ1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1757314370; x=1788850370; h=date:from:to:cc:subject:message-id:in-reply-to: mime-version; bh=4Eeqj2k1DIK0c3JHPAR/OsYQ4uYJDfFWYBlctf3rXWM=; b=DffdilQ1Odx6mSyCkwhTfEP6Z/OmMlszApEzBeCNV8K9fxczmS8qPHCY CWKBJS2kOUZfd31ZFCP0p/IAL8iY1TUaHAvIZ57ihTfgwM0rjJyRzjvyL kwNLCpQbrpn0zI8Yjlemn97HsFj2lusIBwBTapyT4hqvSs4wgfpBsTUnm TmdeznPHuug18QQXovF6rIp9yiQZp+Uec1EV2u6nOXfpmo75iFxfx8Ysw rk/hBKxzFRIXyxHdvyeEq9bjrlE8mys7p7yNYxg+t8i4UMJoHC2Vfbfex Jms3MYEWCeXspjJdddExONF1uTEaxY1CbIOZvDJmaIyUL8BNfZzg5ULLy A==; X-CSE-ConnectionGUID: kAO4+PMMSNm15A6QXnGMyg== X-CSE-MsgGUID: cp0+myHLQl+tB4B4zwEAbA== X-IronPort-AV: E=McAfee;i="6800,10657,11546"; a="58776798" X-IronPort-AV: E=Sophos;i="6.18,247,1751266800"; d="scan'208";a="58776798" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Sep 2025 23:52:38 -0700 X-CSE-ConnectionGUID: 7qQwCxi0TXi5Nj9l7y9+bQ== X-CSE-MsgGUID: QbTrnxY0QdO+a8fNMbD0CA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,247,1751266800"; d="scan'208";a="209870849" Received: from fmsmsx902.amr.corp.intel.com ([10.18.126.91]) by orviesa001.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Sep 2025 23:52:37 -0700 Received: from FMSMSX902.amr.corp.intel.com (10.18.126.91) by fmsmsx902.amr.corp.intel.com (10.18.126.91) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Sun, 7 Sep 2025 23:52:36 -0700 Received: from fmsedg901.ED.cps.intel.com (10.1.192.143) by FMSMSX902.amr.corp.intel.com (10.18.126.91) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17 via Frontend Transport; Sun, 7 Sep 2025 23:52:36 -0700 Received: from NAM11-BN8-obe.outbound.protection.outlook.com (40.107.236.54) by edgegateway.intel.com (192.55.55.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Sun, 7 Sep 2025 23:52:34 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=VoO7Hvik5X1U07bY/5OfraApU7nys+nyPso5rXlzSHJDgwesjYDmI7umILoD/A7u6Vo5VN41qI43EK0SZCBRiOa3sdBw0oQcEuMTOhxfWB2lQds9daDVbjPR9W2+gsyKAWj0cWqX+bc3yFYsLH8aFMMB3kUEEXSliysRjrPYiDP5vu0HfbFZT5rkTODRxDYHnLR6Z5he8IPz8Wz0z3B0OfQaZXzscUkqtCVbDZ6osQDuYWA6IUA0a8bJ0nXaZf+bmX+SG9kAgZslSxueWHYeOHCoO3rsPQ0cEaB+f0yvVHZY2Ow0HYT8UDUjZE88bASVk2EW7G2+DYSlR1uY2FUUnQ== 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=RD548XasJSygk6TWGD8aCfopKsQ6z3VAuJLW52x9tHo=; b=PRLbM2PFyyEGbhoOGg2fH5NkdAFftz4JbQKsFC0+f/dMvGujj0IYJFNCI4AMWizzx5hDrk3M4AoMJ0e+S128iux9LCzBANAjdn9jgElXThvK51YGTdV7sxNhnCkpoMN7BeXiJ2UdcXHB1NBdszx0k7OQb2OyjrWPfI/WP/KSOUFu9U3kfG9ftNPQZIKi9y1ml7WqLf1+xf+WAPoSrase1nzY+fbO/sqNV7pKNRVUrOeDjRr9CZEfXqv7c4D0U42nZpaaiSzRuffrkrEcE0JW6lDdSB9Yp4IBd3lj0ctdBBhW/fE9uQ/4PvUQDpoV5treHBfTFmnY9z8qi0qvYCcykg== 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 PH7PR11MB5913.namprd11.prod.outlook.com (2603:10b6:510:137::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9094.19; Mon, 8 Sep 2025 06:52:32 +0000 Received: from LV3PR11MB8603.namprd11.prod.outlook.com ([fe80::4622:29cf:32b:7e5c]) by LV3PR11MB8603.namprd11.prod.outlook.com ([fe80::4622:29cf:32b:7e5c%5]) with mapi id 15.20.9094.018; Mon, 8 Sep 2025 06:52:31 +0000 Date: Mon, 8 Sep 2025 14:52:22 +0800 From: kernel test robot To: Joey Pabalinas CC: , , , , Kees Cook , Joey Pabalinas , Subject: Re: [PATCH] fork: simplify overcomplicated if conditions Message-ID: <202509081409.2daadf50-lkp@intel.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <357638f71edc7f1d9814b1851a64e09a8895bffc.1756968204.git.joeypabalinas@gmail.com> X-ClientProxiedBy: SI2PR01CA0008.apcprd01.prod.exchangelabs.com (2603:1096:4:191::10) To LV3PR11MB8603.namprd11.prod.outlook.com (2603:10b6:408:1b6::9) 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: LV3PR11MB8603:EE_|PH7PR11MB5913:EE_ X-MS-Office365-Filtering-Correlation-Id: 9fb34b66-c0b4-42a7-716a-08ddeea448a5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|366016|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?BcGMaKyDyE44ozEYt1Kl/9qfiag+kfEMtycF1bdg/9rI8pcljbjtjxEXwuuh?= =?us-ascii?Q?DbmFaTgTXL+ol0dA5b/Gldy1TY+PWp8Ir/NEKAy1jd05cKTs0k0gcf4jmcIN?= =?us-ascii?Q?XjbooZcJWWIMvqvni20hiBHLy1+PaybKRze0ZXyH7ymW70kLLDd28kF8duCe?= =?us-ascii?Q?7U5OzIcFEFjX/4bykcPO6IcP+LdqT5lmgKWEyPpFKxYnvQc8qFtSsXTio9Mw?= =?us-ascii?Q?56Puypo+XD9WcufrMVj3fViuFZguGI2zDQxbnTmb4co0WEX81G+qYRj1F/DZ?= =?us-ascii?Q?zizH85To0HKrtW864/9Oi3QfCmwJNZN3vjeELtQHgseer7ZLxjwqnD9PpiEb?= =?us-ascii?Q?RB687h9k+Pmm1oJXp7A5WY0hmI2lhRvZlY/T7AlDzXaeNyqgxh2wjMh80Pl1?= =?us-ascii?Q?vX7TVDMfk9xhBS8yAvzeKR/0GwFdX85CTaYQVQfYu++lTwzvglNysgta+t/5?= =?us-ascii?Q?k8H3laEkJ/uYFTSpDvMfrshq/qAN/dYnwbbpvj4rNvhMG7p2q/d1sIs1i3qT?= =?us-ascii?Q?bjIQCTZhIG8D7Tz8pIX4t8NvSI5QtqcRAHctiXam2zFwk226u+vfnWo+izb9?= =?us-ascii?Q?bxjsngS4J1cuPwC5QGRgn+oQq+fd/Ii/s+h8l07Z1AGCqvtjCDwI7jIrlf67?= =?us-ascii?Q?mw05TO2ffEbPtmH8L2Fuwxboc+qyB9WbbKgBsuaFMYRj4cJEcFZUy8gEZIrW?= =?us-ascii?Q?2qWIZdvP7iNozUx1NUYli3s1L3IAirbsMt8Ec4YE68NFWhQajcNuJfMo6tCY?= =?us-ascii?Q?aw0jmx3jRdGmc/y9vaDuvsjNty7CBJJvZU5bBWCAi9RNDyeQRatbEpQlulhn?= =?us-ascii?Q?WqskYpPFdzYOfxG9TMHly9WA5w7AzPmPmjzlgzani3zw39FOm8TRtqqA1gtp?= =?us-ascii?Q?0tN0H5bMMV1QgpDBiUdP2/BPC8X5ZqH4D+uVFzgjB+VRymLu8nFzMzPu9EBI?= =?us-ascii?Q?uKcyj3sWRGtxnJ9DkIO6x1hydzhevBQvQNwSP3VSyekbyyHQl2rHzYLArEHa?= =?us-ascii?Q?/EHrYieW8A6NV1xEB9eJH+QbGjnq5QM9xy7oohid9Dd4LepIRq2NjAns69dw?= =?us-ascii?Q?6/o8eJAAcCalJgPVKPxVNUxmCBFEHwpqpLSITHKTy2z1jxqeP4YOPPI6LLGY?= =?us-ascii?Q?jF0yFMOEcN9t/KcLBVD/GrJ5QT7bu87zPU2yRz/9IByk7W4rP4TIFkQy+LgT?= =?us-ascii?Q?hYhE5rglpXYJejRUrBkhnnVSKLZGwHEJDHESj3t1sFd36GItnPMR98cdDIrr?= =?us-ascii?Q?fdBmKtjsxkSy9X81MtJjUgkUXKFRAmqOQFlpE5tWmihpHTBvcK6HaPptj+Sr?= =?us-ascii?Q?jAkYWFaP2fLrrYJbHu49L8M/OQRHw8ePHwC3Z5GKO7dsHxf+9LakxieuqjRZ?= =?us-ascii?Q?f6bnk5Mh7BFsT5/V+BAUq8EAoe9R?= 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)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?loxcXBTIC9QLheVG+1RuzOXaANS4ZbNzOPcjZTj+lxcoLT7ZjaceK6YYe34F?= =?us-ascii?Q?bBIvOxikfD0fM9IwYrrDcTnDZ3sNPTxooUZAVs4pfA3m4o2b/T3dXCC1PVAU?= =?us-ascii?Q?Vq+WWHevbs9Sbl1QtrHeKPIVCmgBPfSwcZzXwQBedUeYLJ+MkNJw5q4WzoRv?= =?us-ascii?Q?yFBFfK6vwnJUdS/WqKFvB+zO1dNa5szXvxlk0CMj4bXFZYp7eFpYDr+r/Qw6?= =?us-ascii?Q?j6kAre/aCXzuhts0ELSqtPezZojfyx53Did248bfHRhOv0VSxWuBVMoEkzuz?= =?us-ascii?Q?IlPvhY/4WJIPS7S8rv1jbJWVoIwlptVJG3SUYkj0KigewuknNGZNWnvDBomT?= =?us-ascii?Q?aBst4pFj67/3VEVJv7XLsrk76xs/L/lxVTJKnsGeJJZ+WcNU73E2ZtGIkZL8?= =?us-ascii?Q?XUZRIhISBLjw2DfwS+vGgLv7iV/ti8HQS9s00cVFuhYSEfQtDXh5QrpBgPA6?= =?us-ascii?Q?sTovONU+rUHzgJ8i1V4RcHwDOMB71uxLblohZq/SiP4pfVRNt+GCNvhapgOY?= =?us-ascii?Q?8KjO7W1i5I3mhEjv5e8mjpMgnjXPjFWtTjj30nzbMRHC4Dui6Q8Tagxsf+w5?= =?us-ascii?Q?JFkfP2e8vI0FvpNIVAqaLsk/x9sakjK38h2il28GQcAsELLeSLiUjBaITk9A?= =?us-ascii?Q?A4q0+vy9YiWUNx2xveQyH9/pBZ6OUcmvhz86kczNZox/xxLIr76Ia3bIt6mq?= =?us-ascii?Q?dq18V5Cw7ws6peO96RroRzEJheoD+lowFnNeNaJ1nKCPJKfkqL5X+zCM8tp4?= =?us-ascii?Q?FsfGaL2XGgVWoO4uqRttHQsd93qXhVkGr8Sqmvofs3pcRMgIOxmVwiM4k8T2?= =?us-ascii?Q?F9S+Z9qnPkxfE7ThYKW17029gq0K4tMmMDZHJKSy6v/qRh/8lV3srLXORhvZ?= =?us-ascii?Q?q9VXJcD0tRp+d2CpNMhk+TLC+870Ar//yQcS6dyC63OgxLya56UXCQKacgcX?= =?us-ascii?Q?ALqI8TmK+YCUwSA+aIQc2CQRYJEr3KHwxxR4LIdTEmCv+zaS09UTnkEYvSEE?= =?us-ascii?Q?StfI7/P9R2KqUuBoEipY8aVDAslj4SURxUz97zihr4LQWkyjlB2qU2qqQDzv?= =?us-ascii?Q?PaWNQYCvZWhdCEsrYVHgeeJy5ipp3BPyun4FLbxyqGn6yPoUN1iyVbZVkdQa?= =?us-ascii?Q?RKyjp5BglwoYfVRnqhIu6W/7owtsZE64Jcw/AsbcoXcqo7hKqaw1QEEjBfji?= =?us-ascii?Q?Pc26fbYHHd3vkb7Cb70IB+BpT4sNxEcQgdNAya18EAm3NDMHN8npbOKCTJza?= =?us-ascii?Q?hbfkYPx7tSRkUHYUofRvYf51QiIasIUdakqpWnYQf/m7uV1M9VS/J8SE9Txq?= =?us-ascii?Q?gJwNUOISS41WdGn8/APpFNXggyvRlniXfPVwPwYsCDiKbYFBzkk1D0AQMINS?= =?us-ascii?Q?ihTNPf6K6/T1v8rFHbx4ge0wXTJO+g/MrZCxfk8yXDlxT4e56j9bUjOWF9z4?= =?us-ascii?Q?QbC28+3jatFMzITDroSDgmuybzaG2jj3oGY/8LOki6eI7ZVlXiy22dzEUjpn?= =?us-ascii?Q?SbWH5mnS60EfavcksxSuKihv2QEmF1TTyrtQX8SBYmRcGQ/1rOipWUOoIMN3?= =?us-ascii?Q?v/53ks++lFSvYAksMfWS3lSAWxhew82DsV+zxiHw1SjTeMM9FMdmnpIvU4p0?= =?us-ascii?Q?ug=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: 9fb34b66-c0b4-42a7-716a-08ddeea448a5 X-MS-Exchange-CrossTenant-AuthSource: LV3PR11MB8603.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Sep 2025 06:52:31.8292 (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: OVE2XpgjoKDOH/U2kyqTMhTv0HVlnZVASQ/Zkg1zcvnXAPWhzyFZLpkfRIgaT3QOfzK8FHAAusu2N3cSvFWJNA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR11MB5913 X-OriginatorOrg: intel.com Hello, kernel test robot noticed "BUG:kernel_NULL_pointer_dereference,address" on: commit: 62b2846e29a8bec933d0dd7a3a4ccc7af409d8d0 ("[PATCH] fork: simplify overcomplicated if conditions") url: https://github.com/intel-lab-lkp/linux/commits/Joey-Pabalinas/fork-simplify-overcomplicated-if-conditions/20250904-144729 base: https://git.kernel.org/cgit/linux/kernel/git/kees/linux.git for-next/execve patch link: https://lore.kernel.org/all/357638f71edc7f1d9814b1851a64e09a8895bffc.1756968204.git.joeypabalinas@gmail.com/ patch subject: [PATCH] fork: simplify overcomplicated if conditions in testcase: boot config: i386-randconfig-004-20250906 compiler: gcc-13 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +---------------------------------------------+------------+------------+ | | 8c94db0ae9 | 62b2846e29 | +---------------------------------------------+------------+------------+ | boot_successes | 6 | 0 | | boot_failures | 0 | 6 | | BUG:kernel_NULL_pointer_dereference,address | 0 | 6 | | Oops | 0 | 6 | | EIP:rest_init | 0 | 6 | | Kernel_panic-not_syncing:Fatal_exception | 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/202509081409.2daadf50-lkp@intel.com [ 3.204615][ T0] BUG: kernel NULL pointer dereference, address: 00000020 [ 3.205081][ T0] #PF: supervisor write access in kernel mode [ 3.205081][ T0] #PF: error_code(0x0002) - not-present page [ 3.205081][ T0] *pde = 00000000 [ 3.205081][ T0] Oops: Oops: 0002 [#1] SMP [ 3.205081][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.17.0-rc2-00004-g62b2846e29a8 #1 PREEMPT(full) cdac75d461890a0b0673a9c64f8f62c890a06589 [ 3.205081][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 3.205081][ T0] EIP: rest_init (init/main.c:717) [ 3.205081][ T0] Code: 00 75 1b b9 b4 d6 a7 83 ba 4a 03 00 00 b8 9b d6 a7 83 c6 05 25 19 68 84 01 e8 80 c8 7f fe 89 d8 ba c0 ab f6 83 e8 e0 aa 7c fe <81> 48 20 00 00 00 04 64 8b 3d 18 20 8d 84 89 c6 89 fb 83 e3 1f 43 All code ======== 0: 00 75 1b add %dh,0x1b(%rbp) 3: b9 b4 d6 a7 83 mov $0x83a7d6b4,%ecx 8: ba 4a 03 00 00 mov $0x34a,%edx d: b8 9b d6 a7 83 mov $0x83a7d69b,%eax 12: c6 05 25 19 68 84 01 movb $0x1,-0x7b97e6db(%rip) # 0xffffffff8468193e 19: e8 80 c8 7f fe call 0xfffffffffe7fc89e 1e: 89 d8 mov %ebx,%eax 20: ba c0 ab f6 83 mov $0x83f6abc0,%edx 25: e8 e0 aa 7c fe call 0xfffffffffe7cab0a 2a:* 81 48 20 00 00 00 04 orl $0x4000000,0x20(%rax) <-- trapping instruction 31: 64 8b 3d 18 20 8d 84 mov %fs:-0x7b72dfe8(%rip),%edi # 0xffffffff848d2050 38: 89 c6 mov %eax,%esi 3a: 89 fb mov %edi,%ebx 3c: 83 e3 1f and $0x1f,%ebx 3f: 43 rex.XB Code starting with the faulting instruction =========================================== 0: 81 48 20 00 00 00 04 orl $0x4000000,0x20(%rax) 7: 64 8b 3d 18 20 8d 84 mov %fs:-0x7b72dfe8(%rip),%edi # 0xffffffff848d2026 e: 89 c6 mov %eax,%esi 10: 89 fb mov %edi,%ebx 12: 83 e3 1f and $0x1f,%ebx 15: 43 rex.XB [ 3.205081][ T0] EAX: 00000000 EBX: ffffffea ECX: 00000000 EDX: 00000000 [ 3.205081][ T0] ESI: ee7fd750 EDI: ee7fd740 EBP: 83eebf80 ESP: 83eebf74 [ 3.205081][ T0] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00210246 [ 3.205081][ T0] CR0: 80050033 CR2: 00000020 CR3: 04910000 CR4: 00040690 [ 3.205081][ T0] Call Trace: [ 3.205081][ T0] start_kernel (init/main.c:1335) [ 3.205081][ T0] i386_start_kernel (arch/x86/kernel/head32.c:129) [ 3.205081][ T0] startup_32_smp (arch/x86/kernel/head_32.S:290) [ 3.205081][ T0] Modules linked in: [ 3.205081][ T0] CR2: 0000000000000020 [ 3.205081][ T0] ---[ end trace 0000000000000000 ]--- [ 3.205081][ T0] EIP: rest_init (init/main.c:717) [ 3.205081][ T0] Code: 00 75 1b b9 b4 d6 a7 83 ba 4a 03 00 00 b8 9b d6 a7 83 c6 05 25 19 68 84 01 e8 80 c8 7f fe 89 d8 ba c0 ab f6 83 e8 e0 aa 7c fe <81> 48 20 00 00 00 04 64 8b 3d 18 20 8d 84 89 c6 89 fb 83 e3 1f 43 All code ======== 0: 00 75 1b add %dh,0x1b(%rbp) 3: b9 b4 d6 a7 83 mov $0x83a7d6b4,%ecx 8: ba 4a 03 00 00 mov $0x34a,%edx d: b8 9b d6 a7 83 mov $0x83a7d69b,%eax 12: c6 05 25 19 68 84 01 movb $0x1,-0x7b97e6db(%rip) # 0xffffffff8468193e 19: e8 80 c8 7f fe call 0xfffffffffe7fc89e 1e: 89 d8 mov %ebx,%eax 20: ba c0 ab f6 83 mov $0x83f6abc0,%edx 25: e8 e0 aa 7c fe call 0xfffffffffe7cab0a 2a:* 81 48 20 00 00 00 04 orl $0x4000000,0x20(%rax) <-- trapping instruction 31: 64 8b 3d 18 20 8d 84 mov %fs:-0x7b72dfe8(%rip),%edi # 0xffffffff848d2050 38: 89 c6 mov %eax,%esi 3a: 89 fb mov %edi,%ebx 3c: 83 e3 1f and $0x1f,%ebx 3f: 43 rex.XB Code starting with the faulting instruction =========================================== 0: 81 48 20 00 00 00 04 orl $0x4000000,0x20(%rax) 7: 64 8b 3d 18 20 8d 84 mov %fs:-0x7b72dfe8(%rip),%edi # 0xffffffff848d2026 e: 89 c6 mov %eax,%esi 10: 89 fb mov %edi,%ebx 12: 83 e3 1f and $0x1f,%ebx 15: 43 rex.XB The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250908/202509081409.2daadf50-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki