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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 57000C0015E for ; Fri, 11 Aug 2023 17:08:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=nR2VSXweh8ZWa28yPfff7REFETz7Q47E3/VAUBocPkE=; b=RJaSEMaTEaE610 TkKob5P0Vojt77e0k1aQbg8W9RA9OXZIu+Ky1LUiOJsf35PbHd14JfBHQi0tUyTgHkgDxwcB9XCuh eM+NCwT4pGCYgQzQtXIWKfaLUB/ykVdi9I2ctsKoyJePUbxw8p0AvOuREPNsuFHY2zyLWSsh6ZvOB v/NcY3W6+OtDUTJ9jQXMjwIyYFy4Mr/T7CTDGRC7NseSZvTTx+VQ958DmieVKullbXXIMTgjAlgbr 2cvkAI2o671A4990m+mSLq1JjET5/3CsD/Z5g5twF1zBC4H8l64M+wbOuxFNSifDxHWFWlNV5i+Zr 1BMSa8P0aGS1Zm5GAkzQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qUVcF-00BCO7-1G; Fri, 11 Aug 2023 17:07:59 +0000 Received: from mx0b-00069f02.pphosted.com ([205.220.177.32]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qUVcC-00BCLe-1i for kexec@lists.infradead.org; Fri, 11 Aug 2023 17:07:58 +0000 Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37BDYT04000367; Fri, 11 Aug 2023 17:07:06 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : content-transfer-encoding : content-type : mime-version; s=corp-2023-03-30; bh=TpE1wqVtb7MplpG9Vaelj6riR98OXh5MaMtMxiY6bCg=; b=BJ5THPA44KkdU4QMLcj4v6tQBaiOw+9AU7LORw7UeP2LNcdBZdvGXKLZJH7QL5wvkba1 n/QgqkQgbIMeejuMAHYgLSv+HQW8NX8e77EkpPHn2RxkMFy1m2dPUPjKCWfZQE3prOpG 4Tbl22H0qSZBhXcZYtIu2ov/Tv7ivFCYBqU9XMru7ysk40VN+VIOxXb8Bo755x74G9CJ Yzj2UrMIhn60GVSPRnrq2Qe9uyPkWFxVBqqF3GjJlMqH6mJ4T1UR0n7ynwJn8Rc9WGJ7 yQJyoQibF3yUjRaH/SiY9JDCAQ42gww4P7hCTfrKp3YAHeXIiwNZg2GWdBXhRMHiWE+z JQ== Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.appoci.oracle.com [138.1.37.129]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3sd8y6sfvc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 11 Aug 2023 17:07:06 +0000 Received: from pps.filterd (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 37BGT0iQ011134; Fri, 11 Aug 2023 17:07:05 GMT Received: from nam12-dm6-obe.outbound.protection.outlook.com (mail-dm6nam12lp2177.outbound.protection.outlook.com [104.47.59.177]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 3s9cvh2dnh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 11 Aug 2023 17:07:05 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=eLRr34Hvf3bS3OEh4am44wPBRS0DjIxH/pKpr1V3IFRHxDKjt9YeH7UDgc8BrZ43m/zOzWNFmFzoeYWvKphjMpDnuhNNoWtFfxEBeXRI9ackKDg7+4BsrVXAKy0+hi335UXfv4SDS2J/NakpTho4tQqREP+knmkIXJqtHKyZTi90un/uuopIV/aWjCgY6gEuQyne318gXxO4PVKscTylE4S+UcHa9nlTMOFSY7OcvOhYDrNroJg4jfSliHN+KORSg66Ai7vaCIT3ZNVGOXkCtRrabNmGniyO8zEhPc/4zqaUvKJ+efY/npv/DrGeyCvkkKh2qomvhtWiEgLJXXrN9A== 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=TpE1wqVtb7MplpG9Vaelj6riR98OXh5MaMtMxiY6bCg=; b=LilzivjurDPAgwOUuV7RRdb0bZUAO1DBCWp4+i+nr0eqwX7dl/AX+aHiYR6PbQPzrarHjB79bs5a+IIYVUtyCiXeIupdkhEpfvpC73buscR40k5QuXjbXEvxmspRSBnIo9unUKzezIobZMgyEf1GLPBSiykwz2PHk00S2WzSFOqnjr15GIuOlAEgX5aVbyZJYRYASGKxphFB5JGrA9oxZolbaDpeBTqWnJ2DJ5Z4ednirtUAOUscnnl4FXtRQF46WjkawVKSdbr+sdrmoKioMzJazIhXQr+e9pQqGXDftoOeIVOAnDkc6o0wpbBh3OTr6do+1RG2YUCr+yJif+uxWA== 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=TpE1wqVtb7MplpG9Vaelj6riR98OXh5MaMtMxiY6bCg=; b=uVARqjYHUa4TgQHUkDsGfq88nYuhST6JuycyGzWZNeGBaIyZ+NWkjmUxd57ExpQGK91ViX5E0fAgE9mBlURTivDAl5Leg56VQaqTuTUGB+Vyhzpxi9nX79xXqjwvP+GpjGTFdXwrQ/fKQ5smiGD1BnjpEsZDLEcWxUb1y3d8VKU= Received: from CO1PR10MB4531.namprd10.prod.outlook.com (2603:10b6:303:6c::22) by SJ1PR10MB5978.namprd10.prod.outlook.com (2603:10b6:a03:45f::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6652.30; Fri, 11 Aug 2023 17:07:01 +0000 Received: from CO1PR10MB4531.namprd10.prod.outlook.com ([fe80::be4f:55e6:89c5:4f57]) by CO1PR10MB4531.namprd10.prod.outlook.com ([fe80::be4f:55e6:89c5:4f57%4]) with mapi id 15.20.6678.020; Fri, 11 Aug 2023 17:07:01 +0000 From: Eric DeVolder To: linux-kernel@vger.kernel.org, david@redhat.com, osalvador@suse.de, corbet@lwn.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, bhe@redhat.com, ebiederm@xmission.com, kexec@lists.infradead.org Cc: hpa@zytor.com, gregkh@linuxfoundation.org, rafael@kernel.org, vgoyal@redhat.com, dyoung@redhat.com, lf32.dev@gmail.com, akpm@linux-foundation.org, naveen.n.rao@linux.vnet.ibm.com, zohar@linux.ibm.com, bhelgaas@google.com, vbabka@suse.cz, tiwai@suse.de, seanjc@google.com, linux@weissschuh.net, vschneid@redhat.com, linux-mm@kvack.org, linux-doc@vger.kernel.org, sourabhjain@linux.ibm.com, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, eric.devolder@oracle.com Subject: [PATCH v27 3/8] kexec: exclude elfcorehdr from the segment digest Date: Fri, 11 Aug 2023 13:06:37 -0400 Message-Id: <20230811170642.6696-4-eric.devolder@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230811170642.6696-1-eric.devolder@oracle.com> References: <20230811170642.6696-1-eric.devolder@oracle.com> X-ClientProxiedBy: SJ0PR03CA0339.namprd03.prod.outlook.com (2603:10b6:a03:39c::14) To CO1PR10MB4531.namprd10.prod.outlook.com (2603:10b6:303:6c::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PR10MB4531:EE_|SJ1PR10MB5978:EE_ X-MS-Office365-Filtering-Correlation-Id: 0e5b8132-965c-4ccb-f64e-08db9a8d60db 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:CO1PR10MB4531.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(376002)(396003)(39860400002)(136003)(346002)(366004)(451199021)(1800799006)(186006)(6666004)(6486002)(6512007)(478600001)(2616005)(6506007)(26005)(7416002)(107886003)(2906002)(1076003)(7406005)(66476007)(4326008)(66946007)(66556008)(316002)(8936002)(8676002)(5660300002)(41300700001)(38100700002)(86362001)(36756003)(83380400001)(921005);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?rMg7ShuvNFGNqr8lcc5g87jBq+Qgdsk7LSabMjXF6IX07FyPC/YQu0oVUh1l?= =?us-ascii?Q?ATAlgBM5TTk2R6kjptJ2M+dt1Kku2QokrSR8rFG0hV3U4R/+VQsTLzcbhRo/?= =?us-ascii?Q?2M56yJ77ZxAeE3RNzsyQ92uSWeBufNiKX0KXYiytKmHS3tBBpSoYVH/eUnK/?= =?us-ascii?Q?aajYWZEr7cR4Okpri6uZl72kbThA2WZZOpAX9Ztr3MTgBS+qAy/JcLI+sAIb?= =?us-ascii?Q?pC7jcKPmjfu/TRoJ9gN20z7Tcbb0UwxIYZFcRr1ASgRU5B0ROaXdBQyfItlO?= =?us-ascii?Q?ELEyyvmTVmiHhsM+qhh4vC3dtlUjF+q0Fvz+A7skstcd5wklnQJPrNz22jtW?= =?us-ascii?Q?D65CgNQrPIYoou2kiNQTvnK37XaGdBRDjNCyoHnrzHe8B+ptUZ3B3TZqInSh?= =?us-ascii?Q?akTyqI/XiTreWhZ2tvPnrSW0sXmYrO/97ceievZWABSTgqqr3YJgDrS41Qgp?= =?us-ascii?Q?8buWJQBysxjnFAlGcgghQ42mmoTd+ZcIloQZh64Gx/bj3MLOy47tjPTjna+v?= =?us-ascii?Q?bFLCBIMsnMFe8CrEQdlh+CGi9WuO/QKY8mWMNQjY6pc3vPvcG63M5zYmnVPs?= =?us-ascii?Q?eaO5PnxLVBzmvqSdvv8Hncz+ghN37JteKXy9CBpRYI+AxVTfmUUMqYLB0icA?= =?us-ascii?Q?9G/Tp5I6kp78U1Kf9PFmQzSxu0OzAvzdZo38y3jjIiKXo5xn85UiOZtIleRE?= =?us-ascii?Q?g+PYcUeiiDLdLP2n3+3Y3iVsIzmzLB9RfUjwBEna0WYIl8rNKNx1sfjPo3ZU?= =?us-ascii?Q?1Gr9hz173W+Ne716wq/i0hV2BxqbRa+luDsy5BdloLYy8uc06n2LowI9ry2e?= =?us-ascii?Q?ZeN2xNZXh+1ChbSx5dwrZydzfsgcDQQdbXhgAjvuSgww6i3KdSF6cnKeD+Eq?= =?us-ascii?Q?0Ut8zTJtT/q1xkPmLZjALZ0FqhFpNiow9o3u7H2j1xA6iAsdMKeZtmEzUy13?= =?us-ascii?Q?5c32qbtJ94GVi1gjldMzN3gyqDJMscu0/lDgTgWouo3n8Ef7FdC580QM8n2e?= =?us-ascii?Q?ml+xtdOqQj6BCAYNEtZZ5shhkiYVeHDQ0sB/KGSm8+mnUyln7XFNIpGVhzKA?= =?us-ascii?Q?o5kbnS/eMjdAB6W+fMLJu+ceI9daSd8Nho6FTGfWKNevA9wHUiy2WHpO2B6h?= =?us-ascii?Q?DtzDDhEj+WVQykMCMN56v4bvwiLpjftbEfTWZjPJ7QAwYHIHSPkdv2VfMMeE?= =?us-ascii?Q?go0aZ1On8YHsfl9NDgLtVQ9cZs31KYj0qeFO06fJuEzOfBCyYEQAM3XuECrH?= =?us-ascii?Q?olQpyphQdFYhjZXm2SrJe10/2ApyR7RTDC61Lyef4xHlQj3FpoqclhOF7v9L?= =?us-ascii?Q?cgDA7VqN9yyaeM61yxlz+bfCmN+muapXKNuXj3/ptA5mlMK3XDwIcghQ2KUF?= =?us-ascii?Q?W8oheyjSzUMVVvlPQmo8Qok/GxfroBMPMIFIruv4ky4xNK+lJpoN/Dj/9yZL?= =?us-ascii?Q?iE4NEH2JLBIAx3o3qOf4Hsd/wo6XhsobodLR7WF1La/oFiaG58CEmSeT8RiS?= =?us-ascii?Q?qSiJ+qfhzBLS2h6PzY4DUoLQxV6t8nnEvpx6r5Bp57KDEk4boUYGZ7J/UQra?= =?us-ascii?Q?6H0U5eTFbA8cIo43bo7p/Vare8ijswtxTMm/j8xZLxXcq2s2WlO6fg7bEdak?= =?us-ascii?Q?sw=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: =?us-ascii?Q?FENJUGueX4fP9LK3+ctcLip+bzNfajW2/7mrD4u5bohymAX5yVz77uVUJrCS?= =?us-ascii?Q?Q2iJuYzqL5aIoOwcSVTMJFf1VLCDs/bPge1NBgK5uD53JZpoxGC243ofxRcH?= =?us-ascii?Q?imWGfUDXJWcCNKVwU5nzv9q2nZgxA05g9uGWNa50bdZUwg3+PgbSOpHnGm9u?= =?us-ascii?Q?p82pGW1giZnCwjMwwl1KIjAMxBdBzQbgAGDVd2FsgJDamGxaTrnVT6FWs9C6?= =?us-ascii?Q?Kw9ASWBJ2QW1FlCUe0bCpaPnNEeur4cu9WVvfXwfcZ5BKCgE6pSnut+SRYNJ?= =?us-ascii?Q?t13eqiJj9Z5CyPFWBIrP2ozyvDP6bn+SMDfk2i4wz+NbPRGHV9qHOg69b514?= =?us-ascii?Q?U/JRAtpVLCLeBUN94iyBVuIeM/MViK+ea2k2gY+jSjEtWzNlPWs/DLV9sf5X?= =?us-ascii?Q?9POwlCpfVLdVezKc9mFh8lsqPTO4ewHXCcFm2EHHHZsOis0Ex5dKnQPTiS2v?= =?us-ascii?Q?JaPxjkcmygGj7CV4UZ1EvdrOsRsp7c/lkw5BfM40yXsPxhoCS98WBKGf+cAO?= =?us-ascii?Q?qj1U06rtuknSf+pG9KHKScBdww89l2tJIHtqclyP1eQtf9eppSJvbj9vBY3e?= =?us-ascii?Q?p2lvg81p+O6PJ9iFqYqozNx/GafBcCBWhUY3SxDJ89JRTf8qCNkwkBK0IJ7m?= =?us-ascii?Q?k99WH50+wytaKrI+DN+s6V6gWHBrzVCRWxWfSfxHr+8s/qEK4tV8P3dSs3DK?= =?us-ascii?Q?FLYSY86WhXk5N02zOXOMiniDJ5/K+M/S4yznzsEnUkSbmCuvMmOzU3tb5jRG?= =?us-ascii?Q?ry7EvFDDbcukG5oO0jSiBB23vwBot9zhyNbXq5gGLQLgbLFjPC1stfbok9q2?= =?us-ascii?Q?aHcPUb7IzdIWQyvQJsie+YG+BXYtHOarwlP1XmkH6FyyuRqyF2MtGOYMXezV?= =?us-ascii?Q?2KiK8qOF/Y4hwiOaE830dyyzZKulJaCrgyQHRxa3KJelRqY9BomyCyBTIA5p?= =?us-ascii?Q?hbDI42Sa3QcPq8hOp1rip/A0Cy1u02I8U6Vc2fwD1AmYUmsUcXVgQkBdLpT1?= =?us-ascii?Q?qXK7eyvkHoTBK5AInaIO8SPS3hJenVvlwgr4seF7nspOb2S2DquDD29Mrl5S?= =?us-ascii?Q?9Eqr09RAzj13OvlsVMQngeMctFxZ7yeaQG31HZQygd4ecoaHqfdb8Kru4W0t?= =?us-ascii?Q?I/L7CDVN0ZHpKQgpK8FDxeqwr56JuDCdn46l/i3StCp1n/X8pEYKI0agiOna?= =?us-ascii?Q?cmav6c5ZcwEes9hR5i92zioQ3An2JF9P3Ca6DBO8IHyJAKjWNrhgKqtYFMRR?= =?us-ascii?Q?E5bJLSSUUXOGvIdI5ppiTwShFhb41LUHv0qkt8fYCwyVHbqdMr0lUdhIMy1K?= =?us-ascii?Q?pdxlGxY2VoOsP4xqnEzNe8BUH9puXKmo1oU/sE5wOsImw6w23nqboUeF0rdk?= =?us-ascii?Q?ARFBWhL6iHAf/GlgvwWj87XQsEU//v6p2a6uSCLrTrbDmmRMUdVuui8f0wm7?= =?us-ascii?Q?OINQ4T4ARlA=3D?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0e5b8132-965c-4ccb-f64e-08db9a8d60db X-MS-Exchange-CrossTenant-AuthSource: CO1PR10MB4531.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Aug 2023 17:07:01.2723 (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: bcWMiCR6tfzi3MNad+Dl9OCCj6hsLFj08QoO4YT7f7RjrBJXdt+aQA/lo5sNw2JFO4UuAtD7hU7HX354GJoSsDufx1eSGhd6v/6GrxthFMA= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR10MB5978 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-08-11_09,2023-08-10_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 malwarescore=0 spamscore=0 adultscore=0 mlxlogscore=999 bulkscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2308110156 X-Proofpoint-ORIG-GUID: Z-aVg-jZHAyDecndJUfDnAIuT68CDdSL X-Proofpoint-GUID: Z-aVg-jZHAyDecndJUfDnAIuT68CDdSL X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230811_100756_704477_D96507CB X-CRM114-Status: GOOD ( 18.87 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org When a crash kernel is loaded via the kexec_file_load() syscall, the kernel places the various segments (ie crash kernel, crash initrd, boot_params, elfcorehdr, purgatory, etc) in memory. For those architectures that utilize purgatory, a hash digest of the segments is calculated for integrity checking. The digest is embedded into the purgatory image prior to placing in memory. Updates to the elfcorehdr in response to CPU and memory changes would cause the purgatory integrity checking to fail (at crash time, and no vmcore created). Therefore, the elfcorehdr segment is explicitly excluded from the purgatory digest, enabling updates to the elfcorehdr while also avoiding the need to recompute the hash digest and reload purgatory. Suggested-by: Baoquan He Signed-off-by: Eric DeVolder Reviewed-by: Sourabh Jain Acked-by: Hari Bathini Acked-by: Baoquan He --- kernel/kexec_file.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index 453b7a513540..e2ec9d7b9a1f 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -726,6 +726,12 @@ static int kexec_calculate_store_digests(struct kimage *image) for (j = i = 0; i < image->nr_segments; i++) { struct kexec_segment *ksegment; +#ifdef CONFIG_CRASH_HOTPLUG + /* Exclude elfcorehdr segment to allow future changes via hotplug */ + if (j == image->elfcorehdr_index) + continue; +#endif + ksegment = &image->segment[i]; /* * Skip purgatory as it will be modified once we put digest -- 2.31.1 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec