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Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0 Subject: [PATCH 2/7] xz: fix XZ_DYNALLOC to avoid useless memory reallocations Content-Language: en-US From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , George Dunlap , Ian Jackson , Julien Grall , Stefano Stabellini , Wei Liu References: In-Reply-To: X-ClientProxiedBy: AS9PR06CA0420.eurprd06.prod.outlook.com (2603:10a6:20b:461::7) To VI1PR04MB5600.eurprd04.prod.outlook.com (2603:10a6:803:e7::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 632158c3-9aab-4687-a52d-08d9ab46595d X-MS-TrafficTypeDiagnostic: VI1PR0402MB2704: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:56; 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:VI1PR04MB5600.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(366004)(31696002)(38100700002)(36756003)(508600001)(2906002)(31686004)(8676002)(66476007)(66556008)(86362001)(956004)(2616005)(4744005)(5660300002)(26005)(8936002)(6486002)(186003)(316002)(966005)(66946007)(54906003)(6916009)(16576012)(4326008)(45980500001)(43740500002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?q?RInsRBRP3Pw+XO0lul8FfMPallbr?= =?utf-8?q?6svWs45OYqZTqXuYR87cnKkZ78LY+AK5UaH4sSOrjcA+hXlOx2cwYZYzZ5TxnGvDU?= =?utf-8?q?gHR0aWB2kw0Olf7wHl3tYtnK4p2ckbWd28VtwjHRB4ddOz19xYbN95TNWsdspFbKu?= =?utf-8?q?LbOw7zs5BjYUW4cAFth+CvrtzyUDJ0nDM2xEr8D/nLutmRFgIzK2sYm1ClrR76PCp?= =?utf-8?q?UH2ei5dPPw/M5k36qJpRXDqf4q9ZIJbKA1bgtNEntBYM3itMFFhYBHSqWGfWao40j?= =?utf-8?q?M+Kf1JJxoSOfc+LHMrjNjRihB/0hvEyz2A84stM09/QiX6mCfJrzRJVaovCzxrEeY?= =?utf-8?q?8MXASos9kafLK2a1uhgEZVZL1M8phROcj37PnFrKKhCoNhJXqsnx2JJdjugnx7pOm?= =?utf-8?q?a0H2zw8Ypku2+3pVPeP1FhvKcmvoYQDu7UVaNqwNhS/CMo4NMCJeX360lAnlZ7Czs?= =?utf-8?q?DGVyE5W2a7T2Bvtq+ENDKRzCN8eEPHSdKdBh7F24CAzNCTCo2HJGRZvUptBkhMCx1?= =?utf-8?q?jHMH88cFIq0YWu9ikMlAFItuE1Ooxu0tqUoOD5VZNndoOQ8Uib6xnzPWaCGFofO41?= =?utf-8?q?X5lcgUeZu5aQnUk89E6BP71wXLyM7qiHAqXt+iwXHcEQhTm+hHcJw/i8XAsiC1Bce?= =?utf-8?q?MgVHybWcbEDXMHTQejRxJp+KoNOGGq8KIrdAXuor6SwzMTv/F+zzaHD1prY34nqqt?= =?utf-8?q?CbEY7eP3gHkyckS3kDuaqsNROQQFctM5Y9+dtPbFgzeTqcW+P8blye27XGeFnfWpd?= =?utf-8?q?/j7Pcw8EEMPJp598ooIPxfGr3AT8ipR/mXI0tgOjaP2VSMQIxn/3AIfasikDOdBmY?= =?utf-8?q?V6sghl5dICgOnTpDbtz2ICLkhrGaRdQePZcQEj7jVxK5lAScSnXfc3i5jfIjyMQP/?= =?utf-8?q?zNNzKHO9JXVw3eUl/UBCyuMtTka/LE+V02CYJZtUdm37aPpCK0zlS/ens6l5vXt/f?= =?utf-8?q?RIX19P8zO6vs90eSSASQlC334Ktd+wwQA7zvmENTpSeCpSCeR4GVA4qeOLYMdboiM?= =?utf-8?q?lWPZPoIBDH37Gbi+BW70F58cIfQJUcYRLNi4X8xEbBbn43p27W4KIvjIYDafDpI/+?= =?utf-8?q?XSk39w7aMF2lBsAgFhc9tDpL9EYPKHGcW9f1RbRC++L1M/TZBWAPORML8HD0m7F2e?= =?utf-8?q?HFFbEu4ziz4ffvjB/e5vdjD58Fs1VnFhIdndxJNPoMl9ObV63FfVS3PZ0vmvlfqA4?= =?utf-8?q?jCwRSfEMZUAyvDFWN0IfNCq29GydbQTiqFE2KMFXX6nFeVtoQhpNk1OLyxd5m5nPB?= =?utf-8?q?hrFR8ktbNmZ9joB2Yyic5nqiJNc2Uhj5pXGYfN9EUspLkYpXbH4mt/sTC4if6oT4O?= =?utf-8?q?9HpN3i37E4qZ0w9+yziNu7KHOBAlIxHaTQFRaG/orYlPMor+nSRYDJv3YfKypXQbU?= =?utf-8?q?TemJoIHPO+6ypbkaedNOS66CY2M0GsaKnWrYfq4CCi9Mt422UhgSIxZuIYq8LEpaO?= =?utf-8?q?pWVkVkaSo6csy5fOlRyYAoP9T3s9kvRoT9DQSeLXlD8QYfVAjjSvQQ5SY1IouL3lY?= =?utf-8?q?dwLcE9rdxgOgoRRvolvXLGkzFwkmQWvKjIFaJj5OK2Q+QIMjeg2zpqg=3D?= X-OriginatorOrg: suse.com X-MS-Exchange-CrossTenant-Network-Message-Id: 632158c3-9aab-4687-a52d-08d9ab46595d X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB5600.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Nov 2021 10:21:28.5895 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: f7a17af6-1c5c-4a36-aa8b-f5be247aa4ba X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: ks5r58P7QlroyeKlAEsnhUqMs6WBR3xJJFvZqdEiGct38Yn1wlmj2GOK9uPdcb3XtgIWYEKgd0wvCsVoTt1+Ow== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR0402MB2704 From: Lasse Collin s->dict.allocated was initialized to 0 but never set after a successful allocation, thus the code always thought that the dictionary buffer has to be reallocated. Link: http://lkml.kernel.org/r/20191104185107.3b6330df@tukaani.org Reported-by: Yu Sun Signed-off-by: Lasse Collin Acked-by: Daniel Walker [Linux commit: 8e20ba2e53fc6198cbfbcc700e9f884157052a8d] Signed-off-by: Jan Beulich --- a/xen/common/xz/dec_lzma2.c +++ b/xen/common/xz/dec_lzma2.c @@ -1146,6 +1146,7 @@ XZ_EXTERN enum xz_ret __init xz_dec_lzma if (DEC_IS_DYNALLOC(s->dict.mode)) { if (s->dict.allocated < s->dict.size) { + s->dict.allocated = s->dict.size; large_free(s->dict.buf); s->dict.buf = large_malloc(s->dict.size); if (s->dict.buf == NULL) {