Received: by 2002:ab2:6203:0:b0:1f5:f2ab:c469 with SMTP id o3csp462651lqt; Fri, 19 Apr 2024 00:36:25 -0700 (PDT) X-Forwarded-Encrypted: i=3; AJvYcCXvregWX8/7nQccZtl3X3uRxAjGV4hf9944SMj7gzCxTGL2G/VQH43I1F+fqjKlf/C4dZGT9Wq7ENIWcpCIaAXeUxvSzrOQSuB14EgbRg== X-Google-Smtp-Source: AGHT+IGhGHenywGBXVkvBiEyWN/opWWhUbGSQvHw7asLxgJBIgUoHTNGxkYTt7CA/9osM+wjuzvo X-Received: by 2002:a17:906:fac1:b0:a55:6600:b33 with SMTP id lu1-20020a170906fac100b00a5566000b33mr808273ejb.23.1713512184982; Fri, 19 Apr 2024 00:36:24 -0700 (PDT) Return-Path: Received: from am.mirrors.kernel.org (am.mirrors.kernel.org. [2604:1380:4601:e00::3]) by mx.google.com with ESMTPS id h18-20020a17090634d200b00a4e29bc4363si1698723ejb.760.2024.04.19.00.36.24 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Apr 2024 00:36:24 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-151114-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2023-11-20 header.b=hhynvhar; dkim=pass header.i=@oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=ROZGLE0Z; arc=fail (signature failed); spf=pass (google.com: domain of linux-kernel+bounces-151114-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-151114-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=oracle.com Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id 8B4681F21EE8 for ; Fri, 19 Apr 2024 07:36:24 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 455364596B; Fri, 19 Apr 2024 07:36:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="hhynvhar"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="ROZGLE0Z" Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) (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 5F1A826AE7; Fri, 19 Apr 2024 07:36:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=205.220.165.32 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713512177; cv=fail; b=TzP+FqTwSYeR0yl1iqgURfwM0iFsWS2QVksrXccZaf7DD9LWDULXzZ7Tj1yKLYNI96k1ucwT7zLR8yQ/b8Dz3QrVnfjjjCb5i5R4bVSKbCR4X4rFyhff6v4RHND0tn36iJiQY0OUEqtsezxBm9fWmvP371McX4PJwFMZhTtwLow= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713512177; c=relaxed/simple; bh=rgyKZRPMYBzi+6EYZDbUmTgXi5PX94kOK6DpFbaY6HM=; h=Message-ID:Date:Subject:To:Cc:References:From:In-Reply-To: Content-Type:MIME-Version; b=UQGuPJ5AEfV+W1FVQ/RZQibbFGxZDZhdzQbeP0QiFIx7VIGfRjBatCY2TpSECfSDlZUzkJab5dMX1FcbC2tKMfS/N2bc30+2HMs+0dA+9wPY4A6Qli5f51X/9gT/9D6noQnj+cGU3h1jTTeSMPVkLdVmMoPk5y5l1lQnaZGK0IY= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=hhynvhar; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b=ROZGLE0Z; arc=fail smtp.client-ip=205.220.165.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=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 43J1JCiB013857; Fri, 19 Apr 2024 07:36:05 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=message-id : date : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding : mime-version; s=corp-2023-11-20; bh=5l4jpgIOnBak56rJvFUSJcxImRouwzTUI5AVs9dhDrw=; b=hhynvharEN5Q68kaTgOUE/s/DSQSPqXLzej/D6atvoATjgn6obYRAbhwljnHMV1DNZ1D WkLL/Hqnuc3KrGV9cC6OFP5lIKbfmtAlGYSkH0EfzINj7/bUykI04ubaMjc5gGkJpSw7 bx4OWOW4G4qq3Ltb1L/ktvOwRsOhyRFXL9PllYkD3PJFqrd40KwvMHbCUS6DcvlLgS0y WXsx9H9H0MM9e9luGAPDs43NSh+zbx/UQgOpuPG1bFlHvEitL2Cs3yVndfLmyqEsUZtt 4b2XgQgrL9fGpjsZ8G0xkAc7zz5DxCe6YET/EuNIoH3fnzgd6ROE2nUPYF29jVnbQxkz bA== Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.appoci.oracle.com [130.35.103.27]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3xfgn2v8b6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 19 Apr 2024 07:36:04 +0000 Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 43J79Ob0040137; Fri, 19 Apr 2024 07:36:02 GMT Received: from nam02-bn1-obe.outbound.protection.outlook.com (mail-bn1nam02lp2041.outbound.protection.outlook.com [104.47.51.41]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3xkc5fpm93-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 19 Apr 2024 07:36:02 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ipScQ7oZRS6KW1P3z2rkHFc3vKxacuhVUNAEkS5YR9Lc3fy9ka9PHHCoeHlIHbhqYvkDa2dyYBXrPUF1rTjysfvnXgw5kySNAKFfNJdqClAlLNyw8m0JHkClpe1NeauJaDKEqb6962i6VP+MZiZsA0kGcWc5HEdp8Q1PsY9WgpGr6AM/1agBMZYCxZ/gH96ceAxzdD9N2gA8mTUvn8u2VmLlitIkpW6SR56DbYoo0GPIQVMjmhFmiDPoE8YgTkh0jg5YGITssWXkcI0zAWUm0lNNFWGVuVdQAxVRaUsI5XK9djBfW8/S3PNJ/GDE1Uk6k2zYyatGE0Enpq9KZJcd/w== 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=5l4jpgIOnBak56rJvFUSJcxImRouwzTUI5AVs9dhDrw=; b=O5pN8vlu5U+mIxShEmKAPuOuDFtIzYg3fHPkibX+/qGExPeheFQivyUQEwqNPGoP4GEwt6SDEyLtET/2yGnwRxXPdG/N7pPSOPiW9ujLEpzUw9ZXReXKOG2TlynmBvc4D2A85bSeLlbw4SE5CLkRrZTvf+8X+3+9BuMzwGH/fUkc9ZYDj2T7QV80iuj2NKkQHkLtmFCCjWcPzkdRI/ZjsZGmS4REytfrejco7pxL0BQI9b0QlbSr1woBIFHJU4QekbdyuOskMJolgi7BcjcjVO7NFVHbs2oRMn39c4HDkJOr8K3IQnNR2sZji+Yf7TGAEpyO9L9CUW6rM54o+1aoPw== 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=5l4jpgIOnBak56rJvFUSJcxImRouwzTUI5AVs9dhDrw=; b=ROZGLE0ZEwfkCPsImo6xBLINaKFswA4O+Wv1PNBDxyG0ZIGpQkzYXX1t+hQd3DYtrJjLhdJCFWndBKWaARyAFQpAVw315a94+Wl7tdTg+M8G8sUc+z0BN2pgNIDVqe6D3Ug+ExtvrQlNIMLPAG92ItGuJnOupk4tzwtsJ/4lD2k= Received: from PH8PR10MB6290.namprd10.prod.outlook.com (2603:10b6:510:1c1::7) by PH0PR10MB5562.namprd10.prod.outlook.com (2603:10b6:510:f1::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7472.43; Fri, 19 Apr 2024 07:36:00 +0000 Received: from PH8PR10MB6290.namprd10.prod.outlook.com ([fe80::309b:26bb:11d5:cc76]) by PH8PR10MB6290.namprd10.prod.outlook.com ([fe80::309b:26bb:11d5:cc76%6]) with mapi id 15.20.7452.049; Fri, 19 Apr 2024 07:36:00 +0000 Message-ID: Date: Fri, 19 Apr 2024 13:05:48 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [bug-report] task info hung problem in fb_deferred_io_work() To: Nam Cao Cc: Daniel Vetter , deller@gmx.de, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, tiwai@suse.de, bigeasy@linutronix.de, patrik.r.jakobsson@gmail.com, LKML , Vegard Nossum , George Kennedy , Darren Kenny , chuansheng.liu@intel.com References: <271372d6-e665-4e7f-b088-dee5f4ab341a@oracle.com> <20240418160652.68df1a86@namcao> Content-Language: en-US From: Harshit Mogalapalli In-Reply-To: <20240418160652.68df1a86@namcao> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SI2PR01CA0007.apcprd01.prod.exchangelabs.com (2603:1096:4:191::11) To PH8PR10MB6290.namprd10.prod.outlook.com (2603:10b6:510:1c1::7) 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: PH8PR10MB6290:EE_|PH0PR10MB5562:EE_ X-MS-Office365-Filtering-Correlation-Id: 00355dae-4fb2-410c-b7a8-08dc60435bed X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH8PR10MB6290.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(1800799015)(376005)(7416005)(366007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?NHR2ZFRMQjBxeEZ6eElnd1I1U0h2UHBUSjBSRmMvTlJFdWxPRVg4Wmp5NFNR?= =?utf-8?B?L2dBbU8yaC8zeGxTM2pYeUhzRnJFb0pRQkhsSmJKRmZZMzR3ZXpWblFPVUl5?= =?utf-8?B?dTNvb0ZvdHpSTThpcFN4alNTK3hKcjVTbkRTUmlxMlJWNDZ6bU02blNOaTZV?= =?utf-8?B?V21JRVBXak1GUUJ0eU1NcGNaQnRaeUtMb3NsYTcvc2JuM3hibkd6elliYVM1?= =?utf-8?B?SUF4YmRxcFV6b1RGREJtN2xLcVAyZkp1eCs3VnlLR2JDZzRmQTJBbzFwT2JC?= =?utf-8?B?Vk5kN2NQVTloamtPUnI5ZVFXazM2WEJ3cE4wYndmcklyZG8zc2k5S1REaHVK?= =?utf-8?B?b2ZwUUtwbW9mN2JTOFNCb2tKZm52U29rOEpDVnpmVjU3WjJ0MWxzc0xtbVJT?= =?utf-8?B?Rk83TElnY3Y2QXc1b1NyU0RGU3NNVzc3blNibVlmaUhRWmRaMCtydXI0NE1x?= =?utf-8?B?VlhvSC84VXVsR0g3OUp5cCtGdXZjRUNlclNQRGdxWTJuckpUbXdwM2NITjFR?= =?utf-8?B?UkJ5Z1cwemFiTlNnQjc2N3BFRTdHRk43aFJvWGxEamM5cWNLWDJRSkxFdTdS?= =?utf-8?B?VG16OUs5Mms3bUcweHFCd0pkTEFBVklUQlcxRXpYWVJBMmdTZnRTVW1PUk1G?= =?utf-8?B?ZDMySjN1V0dGenNqdUluVUtwRWovakdlYWVmdEc5K1JCQVBTSUZUR2ErdGpn?= =?utf-8?B?dUtnWDFUUG1sRDYvVjVITHhoVGpncUJITHJ2N0RCNk95UWtsQnVXYld0ZGFE?= =?utf-8?B?VEhrOUQ2TlZ2ZjVRRjlhZnFQTFQxcU9rdnZLdTBSL29SM1IyWXd6VEQ4UXMx?= =?utf-8?B?UDN4UXJ3cllUdjAyV2FjVDk3REw2RFRMSmxNZGZBSmJtMmVvMWZEUG1oeXNi?= =?utf-8?B?WTdOTDF1am5OeWcxVXVoSGZqOFRIa0gyL1dTZE9IZ2tHNVptVWJjSDdraUR6?= =?utf-8?B?RWpnOXNSQmJheU9KSW9Kd2VZZ2dtOWhybFpLVmpybzZ3d1R0bDdJMDJoUEtP?= =?utf-8?B?MUVLUUozZGFIcTB1ZXF3NFd4Z1BtZUJFaVRxZEt5dTl5bmhGZzlCRmx1V0V1?= =?utf-8?B?UjlKZzRMTis4dUZFVjg4b1E0SG1sekl4VXpWT3Nmb2pRRXhLL2NFQ2pqL21z?= =?utf-8?B?WGpZNlczZTlyUVUxMEU5Wm0zdEg1VUZ6dHg3RzV5S2NxRWJSZ0Eybjl4emtF?= =?utf-8?B?TGZwenRyQzdINFNTTkxueDJ2bG5LOHVFcHJKOU9FU29samErV0tocFlsZmwr?= =?utf-8?B?VzR0M1NJZHhsOVlTYlYwUzh4dzhOYkRUamZLdUF3Ny9LV1o4d2pQMTYrNFZI?= =?utf-8?B?UTdPVXpRMnNaVVp5M01OdkI5VlBaZ3FYTDlxR2VXSlFJWjQyaTFXS0pHTXRQ?= =?utf-8?B?QUZXaHhqZ0dNSmNZQTlXSVhpSzlLaFJnQ2hPNjhSRGFuZGpNMXdvbFN4WGd2?= =?utf-8?B?ZTJsei9raWoxWHpXaUUwRVZyWE56Q3l3bU9xaGtaNzJEZUw0MkRXTXFDSk1G?= =?utf-8?B?aDM5eVVuS2ltM002clRWRFBpU1pMUXA4M01yb0xNM2Rma1ZmZ01TeTY5WlJh?= =?utf-8?B?WitXZ2NDRXlOWGFreUswdEg3bTVWTkFPZFBkL2QrV0hSYmNlU1gycSt4M3lv?= =?utf-8?B?WnVKNTZFYVo5cGRKUWRXRTdTcWdpSndKRUVWQzlBY1VvaktFZFZKYThYWkJY?= =?utf-8?B?Tzk4ZCtJa2c3UFJxcGRPQitxQUdmMjJhTERmTGgvdE9JMmd2Z1FQcjlQTVhK?= =?utf-8?B?Vk5GYXFrYi9QSzFiem55K1FSeHMvUVgvdmRHMkZ0YzkxNTBTYktVY0lTZWJj?= =?utf-8?B?V3lPYjNSZG04VnlyL3FabFJ1Q2ZGTk44VDZWZVI2ZEF2V3owVHBjNHFQS3pu?= =?utf-8?B?OEdrVVNuaWdYSlphbldxM1ozUFFqejI1ZjZhYW1oNytDdDJNdVVmZnJSUXlv?= =?utf-8?B?eUxOanlLL09HVldDcUFzVFkyUkZqWklHQ3ZraTdrTktzNjc4elBEOTVTU2Zr?= =?utf-8?B?d3RHc1RuTW5jZ1hPcXVaenBKc2dUekpTTFIycDZ5aHIvZTdFOHdRT2ticDdZ?= =?utf-8?B?SHpnNUxEU2NXdHExMFI4cDhxeUN1T25VODBZc0tBbEtSd2szMGVaeHlBZjk1?= =?utf-8?B?T0FRR05NK3VBMFRWTnZZVzM3T0xqRDNIK2FpOHZhRCtTUVQzSjF5YTVQNEFW?= =?utf-8?Q?1Dgb30Cb8ShBRi77p65QYiM=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: wfhv9HBiHJYBulgr/weXCIq0QgDEpuwOIfAdB5u3Aa1QkRtS7CdIxlDev94j8N4myYcnFvNCan1XSiB1OudYMYCZqay+uZwEzOEjvDZZuxALv6exgqg2HV3irY8rH6mgymI8v8/a/z079NIX5WxO7nNEXuwQlkjjHl5VsNwnZ6QPDkkod4zYqGxmn8Gd6qHAKWMwSnD/Eksl8hYLxF1v0+YYCIersfx30aCnSaNjY64bN595G+SZ+VqZPMwELIdMbyhky1OLAJj+8S/B+SgdJQt0Ij8VrY2aO803KNvPiDMNvUchwHmWAftdylhA/elpPiIFqMqVHRuPYYp35dwqQ79KRu+JkIse/jSp1OXjO6+XMXvlS6vtkBjVx2OabisfxPsuthzmLF/uSFecJZMT8m644/ZitbunoCX4zQEyUnhSVFh9qeFFIeDvCF1qYaqZMxSlNXbGy4cC8c+JzKiUmXsNT2DjatPPWeQBPbFKiF2n8Rg11wjYOu3HykYmSsWp/xWcAuR0q/B0iVZbVvNGbOfE6gQvZDp2zoLQ2aljSHFpbC+7Z3+lTYocsZGRneZcVTPoHCKqGtVei3xC1GVtJaxHopuNM4ZM3z+rXsGx8g4= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 00355dae-4fb2-410c-b7a8-08dc60435bed X-MS-Exchange-CrossTenant-AuthSource: PH8PR10MB6290.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Apr 2024 07:36:00.4708 (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: wb+NtICUBfu6bw8b15A2Vp8diRQqK1boFdGOQ5r+cywQyWx4HyRIbP3fWDd55EQYmvZRg1TZZ3Q0lBntsjzlQZIAndUYiKo2PUIW+DXVfvdEZjhVFTN/uge7BDc2Ft32 X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR10MB5562 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-04-19_04,2024-04-17_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 mlxlogscore=999 bulkscore=0 spamscore=0 mlxscore=0 phishscore=0 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2404190055 X-Proofpoint-ORIG-GUID: QMU2K5OXif2QViTvzDTtLHaO6B-aMaeY X-Proofpoint-GUID: QMU2K5OXif2QViTvzDTtLHaO6B-aMaeY Hi Nam, On 18/04/24 19:36, Nam Cao wrote: > On 2024-04-18 Harshit Mogalapalli wrote: >> While fuzzing 5.15.y kernel with Syzkaller, we noticed a INFO: task hung >> bug in fb_deferred_io_work() > > Which framebuffer device are you using exactly? It is possible that > the problem is with the device driver, not core framebuffer. > I am not very sure about the answer, but the C reproducer uses(/dev/fb0) int fd = open("/dev/fb0", O_RDWR, 0); Thanks, Harshit > Best regards, > Nam