[dpdk-dev] [PATCH 1/1] net/mlx5: fix stack buffer overflow of hrxq's rss_key

[wangyunjian]

Friendly ping.

> -----Original Message-----
> From: wangyunjian
> Sent: Friday, December 24, 2021 11:06 AM
> To: dev at dpdk.org
> Cc: matan at nvidia.com; viacheslavo at nvidia.com; michaelba at nvidia.com;
> dingxiaoxiong <dingxiaoxiong at huawei.com>; xudingke
> <xudingke at huawei.com>; wangyunjian <wangyunjian at huawei.com>;
> stable at dpdk.org
> Subject: [dpdk-dev] [PATCH 1/1] net/mlx5: fix stack buffer overflow of hrxq's
> rss_key
> 
> The mlx5_drop_action_create function use mlx5_malloc for allocating
> 'hrxq', but don't allocate for 'rss_key'. This is wrong and it can
> cause buffer overflow.
> 
> Detected with address sanitizer:
> 0 (/usr/lib64/libasan.so.4+0x7b8e2)
> 1 in mlx5_devx_tir_attr_set ../drivers/net/mlx5/mlx5_devx.c:765
> 2 in mlx5_devx_hrxq_new ../drivers/net/mlx5/mlx5_devx.c:800
> 3 in mlx5_devx_drop_action_create ../drivers/net/mlx5/mlx5_devx.c:1051
> 4 in mlx5_drop_action_create ../drivers/net/mlx5/mlx5_rxq.c:2846
> 5 in mlx5_dev_spawn ../drivers/net/mlx5/linux/mlx5_os.c:1743
> 6 in mlx5_os_pci_probe_pf ../drivers/net/mlx5/linux/mlx5_os.c:2501
> 7 in mlx5_os_pci_probe ../drivers/net/mlx5/linux/mlx5_os.c:2647
> 8 in mlx5_os_net_probe ../drivers/net/mlx5/linux/mlx5_os.c:2722
> 9 in drivers_probe ../drivers/common/mlx5/mlx5_common.c:657
> 10 in mlx5_common_dev_probe ../drivers/common/mlx5/mlx5_common.c:711
> 11 in
> mlx5_common_pci_probe ../drivers/common/mlx5/mlx5_common_pci.c:150
> 12 in rte_pci_probe_one_driver ../drivers/bus/pci/pci_common.c:269
> 13 in pci_probe_all_drivers ../drivers/bus/pci/pci_common.c:353
> 14 in pci_probe ../drivers/bus/pci/pci_common.c:380
> 15 in rte_bus_probe ../lib/eal/common/eal_common_bus.c:72
> 16 in rte_eal_init ../lib/eal/linux/eal.c:1286
> 17 in main ../app/test-pmd/testpmd.c:4112
> 
> Fixes: 0c762e81da9b ("net/mlx5: share Rx queue drop action code")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Yunjian Wang <wangyunjian at huawei.com>
> ---
>  drivers/net/mlx5/mlx5_rxq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
> index f77d42dedf..a1e0b887a8 100644
> --- a/drivers/net/mlx5/mlx5_rxq.c
> +++ b/drivers/net/mlx5/mlx5_rxq.c
> @@ -2828,7 +2828,7 @@ mlx5_drop_action_create(struct rte_eth_dev *dev)
> 
>  	if (priv->drop_queue.hrxq)
>  		return priv->drop_queue.hrxq;
> -	hrxq = mlx5_malloc(MLX5_MEM_ZERO, sizeof(*hrxq), 0, SOCKET_ID_ANY);
> +	hrxq = mlx5_malloc(MLX5_MEM_ZERO, sizeof(*hrxq) +
> MLX5_RSS_HASH_KEY_LEN, 0, SOCKET_ID_ANY);
>  	if (!hrxq) {
>  		DRV_LOG(WARNING,
>  			"Port %u cannot allocate memory for drop queue.",
> --
> 2.27.0