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Bottomley" , Naresh Kumar Inna , "Martin K. Petersen" , James Bottomley , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: Re: [PATCH] scsi: csiostor: Uninitialized data in csio_ln_vnp_read_cbfn() From: "Martin K. Petersen" Organization: Oracle Corporation Message-ID: References: <20211006073242.GA8404@kili> Date: Tue, 12 Oct 2021 12:11:04 -0400 In-Reply-To: <20211006073242.GA8404@kili> (Dan Carpenter's message of "Wed, 6 Oct 2021 10:32:43 +0300") Content-Type: text/plain X-ClientProxiedBy: SJ0PR05CA0197.namprd05.prod.outlook.com (2603:10b6:a03:330::22) To PH0PR10MB4759.namprd10.prod.outlook.com (2603:10b6:510:3d::12) MIME-Version: 1.0 Received: from ca-mkp.ca.oracle.com (138.3.201.24) by SJ0PR05CA0197.namprd05.prod.outlook.com (2603:10b6:a03:330::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4608.7 via Frontend Transport; Tue, 12 Oct 2021 16:11:06 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 2087289a-f73a-4d18-81fe-08d98d9ae595 X-MS-TrafficTypeDiagnostic: PH7PR10MB5748: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6108; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?qAkfEeY7HX7Ey2u0BnaSIpF51zBrwrU56xOkYRR7rYfAd6od296/zBmtjBkt?= =?us-ascii?Q?7oMvpZKlvPTzwoMFDw1IR5xqWoOo59Y/ksE0/1cIRXUodPoFBD0+LqRonsx4?= =?us-ascii?Q?8KkDkkvECWfDD44vVLGbtyx1WZraER3YfxBlbH1mKc6Dj0ThGsDl7TwvrEv8?= =?us-ascii?Q?RA1XnSA5sf4w0YlTAQLcMi4KnnA15YtmuVTG/RX21uoyb4Z8YopdRZIsKakp?= =?us-ascii?Q?CxvWA+rOvm0Ii/+NseELEIODXnYf8bqRc6HV3+dj5L9Fm77cUgCjLi58qcoO?= =?us-ascii?Q?QKPgRA2pUVa3MsjRXf1ASBG6MKhwzZDsnDlMIXLvbMTwEaXYhtnTWZ7oXDLB?= =?us-ascii?Q?khOpoRv5qDQ5hd/gjClIIYnfW+9fS/lI3B3SEjJZJANMf61AYRGfS6VsXdqK?= =?us-ascii?Q?u5cKhMd2vatUaFao/EI3krtTiqXD8zx4ShHSCixy0x0XhjSCB/0qfkpBS5RT?= =?us-ascii?Q?PvUMwHVI1s2jScCVLy95xayulYychcm9c7i5uoRthYdTM0OXmqhq9n5hETj3?= =?us-ascii?Q?+f1H+iIgpB6suq5rOHvmdhlxA/gjDrmr0TDRNAGmYBQsBSdpc+cUhM3xTUNt?= =?us-ascii?Q?J1a9gZ44gqQ6U09aJiZejSENmX1ygsvsCnWVQVN0OrXbf3WjvBYktZ2y7yix?= =?us-ascii?Q?AksAR8D1A8RrQjaHChNjbQ0hlaoQWJv37EBDABtoLp95DbOUcTLYASiXsScz?= =?us-ascii?Q?3NXs6XPuN0uRJXngo+nlhkEoAdQqNyv4ER+6TQRpkM5N25XaMl6yb39pRCJA?= =?us-ascii?Q?YM/cz68KhxhOtTW144jMqyet1aasEBdWepBi3VLbDPhPhuy7gAuMotLwLOeF?= =?us-ascii?Q?v/9g0pQ9wkKXvUeeKK0XQu7dh2Vq4RFC1J3wx+PFn0zKaDE8lzVY7595FfuO?= =?us-ascii?Q?TNFT8RuRo6h2G2+LDEU4UsoKDHNsduhgDk3Y2cmvvgQ4L14xNWtxSHcoH4L/?= =?us-ascii?Q?yM9SVWCCJRQ0u+/1nJfR9fUTUXXRrtouyACukQFWg9K+M7mwNUt0htzOtsP5?= =?us-ascii?Q?zWs7/wKXwUOOsCNICyKpaPWYfENit5DdiSUM53A6hlPCLUp41rWhdWgAbiMW?= =?us-ascii?Q?Qi4VvcV9sshrRwGLmuhRjtcB7SnJEgV5VpF16FXYlsQtNxqpSgp5qQWG+Zol?= =?us-ascii?Q?z+xc9zpEoWOXQZXsEaWmX+jgny9+Iszd3QQBvzuuuoX/KRubOwpUAkfxySmh?= =?us-ascii?Q?hDsmJlO/QsfP3iGefzzim+Nj+N1k4Z6+QPgeWOtg4OTBSTDEFRDCDgkJK4QW?= =?us-ascii?Q?71MtN+vm9OkaayS2h477BDFIORdMMRuDtEMxOH8eUrK2S5Zh6Maiq12XQZUQ?= =?us-ascii?Q?fa71QziZQXT0/vutVxpIBEN1?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2087289a-f73a-4d18-81fe-08d98d9ae595 X-MS-Exchange-CrossTenant-AuthSource: PH0PR10MB4759.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Oct 2021 16:11:06.7399 (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: Lk7xht41ipffF0sKqkg7LNvYMEWmQxTo8PjAXfb3PMHKMtOs5bjDhZm80g8BZZTd8bIhgUBkG0RmvX38rJiaWO40IYLiX+l7wrLnFlHuVRo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR10MB5748 X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10135 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 phishscore=0 suspectscore=0 mlxlogscore=999 bulkscore=0 mlxscore=0 malwarescore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109230001 definitions=main-2110120091 X-Proofpoint-GUID: VQFDMCtXjqAi9f0LkcW7xe1PLsshWWsf X-Proofpoint-ORIG-GUID: VQFDMCtXjqAi9f0LkcW7xe1PLsshWWsf Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dan, > This variable is just a temporary variable, used to do an endian > conversion. The problem is that the last byte is not initialized. > After the conversion is completely done, the last byte is discarded so > it doesn't cause a problem. But static checkers and the KMSan runtime > checker can detect the uninitialized read and will complain about it. Applied to 5.16/scsi-staging, thanks! -- Martin K. Petersen Oracle Linux Engineering