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Sun, 10 Apr 2022 02:25:37 -0700 From: Michael Baum To: CC: Matan Azrad , Raslan Darawsheh , Viacheslav Ovsiienko , Subject: [PATCH 2/3] net/mlx5: fix reading invalid index in RxQ array Date: Sun, 10 Apr 2022 12:25:27 +0300 Message-ID: <20220410092528.1001685-3-michaelba@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220410092528.1001685-1-michaelba@nvidia.com> References: <20220410092528.1001685-1-michaelba@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4d1980de-50ec-41a1-1a98-08da1ad4149a X-MS-TrafficTypeDiagnostic: SA0PR12MB4509:EE_ X-Microsoft-Antispam-PRVS: 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:12.22.5.234; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:mail.nvidia.com; PTR:InfoNoRecords; CAT:NONE; SFS:(13230001)(4636009)(46966006)(36840700001)(40470700004)(186003)(336012)(47076005)(1076003)(83380400001)(81166007)(508600001)(426003)(26005)(6916009)(450100002)(4326008)(316002)(36756003)(8676002)(54906003)(70206006)(82310400005)(70586007)(6286002)(2906002)(2616005)(8936002)(5660300002)(356005)(55016003)(36860700001)(40460700003)(7696005)(4744005)(86362001)(6666004)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Apr 2022 09:25:40.6129 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4d1980de-50ec-41a1-1a98-08da1ad4149a X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[12.22.5.234]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT029.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4509 X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org The mlx5_rxq_get() function gets RxQ index and return RxQ priv accordingly. When it gets an invalid index, it accesses out of array bounds which might cause undefined behavior. This patch adds a check for invalid indexes before accessing to array. Fixes: 0cedf34da78f ("net/mlx5: move Rx queue reference count") Cc: stable@dpdk.org Signed-off-by: Michael Baum Acked-by: Matan Azrad --- drivers/net/mlx5/mlx5_rxq.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c index f16795bac3..d41834f46f 100644 --- a/drivers/net/mlx5/mlx5_rxq.c +++ b/drivers/net/mlx5/mlx5_rxq.c @@ -2042,6 +2042,8 @@ mlx5_rxq_get(struct rte_eth_dev *dev, uint16_t idx) { struct mlx5_priv *priv = dev->data->dev_private; + if (idx >= priv->rxqs_n) + return NULL; MLX5_ASSERT(priv->rxq_privs != NULL); return (*priv->rxq_privs)[idx]; } -- 2.25.1