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Wed, 12 May 2021 02:44:11 +0000 From: Joakim Zhang To: davem@davemloft.net, kuba@kernel.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net 1/2] net: fec: fix the potential memory leak in fec_enet_init() Date: Wed, 12 May 2021 10:43:59 +0800 Message-Id: <20210512024400.19041-2-qiangqing.zhang@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210512024400.19041-1-qiangqing.zhang@nxp.com> References: <20210512024400.19041-1-qiangqing.zhang@nxp.com> X-Originating-IP: [119.31.174.71] X-ClientProxiedBy: SG2PR03CA0095.apcprd03.prod.outlook.com (2603:1096:4:7c::23) To DB8PR04MB6795.eurprd04.prod.outlook.com (2603:10a6:10:fa::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.71) by SG2PR03CA0095.apcprd03.prod.outlook.com (2603:1096:4:7c::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4129.12 via Frontend Transport; Wed, 12 May 2021 02:44:10 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4e6b4e68-957f-4352-fcef-08d914efd2c7 X-MS-TrafficTypeDiagnostic: DB8PR04MB5884: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:486; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4e6b4e68-957f-4352-fcef-08d914efd2c7 X-MS-Exchange-CrossTenant-AuthSource: DB8PR04MB6795.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 May 2021 02:44:11.8454 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 2nNg6yMA9cVqYOCugQ4VLMMPyrVjCCfUPaXTuFnzv4fWVrJlFLpfOuNuKaboMHcE5b03PAuJs3M/FszMPNWY8g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR04MB5884 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Fugang Duan If the memory allocated for cbd_base is failed, it should free the memory allocated for the queues, otherwise it causes memory leak. And if the memory allocated for the queues is failed, it can return error directly. Fixes: 59d0f7465644 ("net: fec: init multi queue date structure") Signed-off-by: Fugang Duan Signed-off-by: Joakim Zhang --- drivers/net/ethernet/freescale/fec_main.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index f2065f9d02e6..a2ada39c22d7 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -3290,7 +3290,9 @@ static int fec_enet_init(struct net_device *ndev) return ret; } - fec_enet_alloc_queue(ndev); + ret = fec_enet_alloc_queue(ndev); + if (ret) + return ret; bd_size = (fep->total_tx_ring_size + fep->total_rx_ring_size) * dsize; @@ -3298,7 +3300,8 @@ static int fec_enet_init(struct net_device *ndev) cbd_base = dmam_alloc_coherent(&fep->pdev->dev, bd_size, &bd_dma, GFP_KERNEL); if (!cbd_base) { - return -ENOMEM; + ret = -ENOMEM; + goto free_queue_mem; } /* Get the Ethernet address */ @@ -3376,6 +3379,10 @@ static int fec_enet_init(struct net_device *ndev) fec_enet_update_ethtool_stats(ndev); return 0; + +free_queue_mem: + fec_enet_free_queue(ndev); + return ret; } #ifdef CONFIG_OF