[PATCH v1] eventdev/eth_rx: fix null pointer dereference

[Naga Harish K, S V]

> -----Original Message-----
> From: Kundapura, Ganapati <ganapati.kundapura at intel.com>
> Sent: Thursday, August 24, 2023 1:54 PM
> To: jerinj at marvell.com; Naga Harish K, S V <s.v.naga.harish.k at intel.com>;
> dev at dpdk.org
> Cc: Jayatheerthan, Jay <jay.jayatheerthan at intel.com>; Gujjar, Abhinandan S
> <abhinandan.gujjar at intel.com>
> Subject: [PATCH v1] eventdev/eth_rx: fix null pointer dereference
> 
> On passing NULL as a last parameter to xxx_create_ext_with_params(),
> rxa_config_params_validate() uses default values and dereferences NULL
> pointer leading to segmentation fault.
> 
> Fixed by returning after using default values without dereferencing NULL
> pointer.
> 
> Fixes: 8be6c94d6d90 ("eventdev/eth_rx: add new adapter create API")
> 
> Signed-off-by: Ganapati Kundapura <ganapati.kundapura at intel.com>
> 

Acked-by: Naga Harish K S V <s.v.naga.harish.k at intel.com>

> diff --git a/app/test/test_event_eth_rx_adapter.c
> b/app/test/test_event_eth_rx_adapter.c
> index 2d5e197666..0233c87779 100644
> --- a/app/test/test_event_eth_rx_adapter.c
> +++ b/app/test/test_event_eth_rx_adapter.c
> @@ -407,6 +407,12 @@ adapter_create(void)
>  	return err;
>  }
> 
> +static void
> +adapter_free(void)
> +{
> +	rte_event_eth_rx_adapter_free(TEST_INST_ID);
> +}
> +
>  static int
>  adapter_create_with_params(void)
>  {
> @@ -427,6 +433,13 @@ adapter_create_with_params(void)
>  	rxa_params.use_queue_event_buf = false;
>  	rxa_params.event_buf_size = 0;
> 
> +	/* Pass rxa_params = NULL */
> +	err = rte_event_eth_rx_adapter_create_with_params(TEST_INST_ID,
> +				TEST_DEV_ID, &rx_p_conf, NULL);
> +	TEST_ASSERT(err == 0, "Expected 0 got %d", err);
> +	if (err == 0)
> +		adapter_free();
> +
>  	err = rte_event_eth_rx_adapter_create_with_params(TEST_INST_ID,
>  				TEST_DEV_ID, &rx_p_conf, &rxa_params);
>  	TEST_ASSERT(err == -EINVAL, "Expected -EINVAL got %d", err); @@ -
> 512,6 +525,13 @@ adapter_create_ext_with_params(void)
>  	rxa_params.use_queue_event_buf = false;
>  	rxa_params.event_buf_size = 0;
> 
> +	/* Pass rxa_params = NULL */
> +	err =
> rte_event_eth_rx_adapter_create_ext_with_params(TEST_INST_ID,
> +			TEST_DEV_ID, test_port_conf_cb, NULL, NULL);
> +	TEST_ASSERT(err == 0, "Expected 0 got %d", err);
> +	if (err == 0)
> +		adapter_free();
> +
>  	err =
> rte_event_eth_rx_adapter_create_ext_with_params(TEST_INST_ID,
>  			TEST_DEV_ID, test_port_conf_cb, NULL,
> &rxa_params);
>  	TEST_ASSERT(err == -EINVAL, "Expected -EINVAL got %d", err); @@ -
> 634,12 +654,6 @@ adapter_queue_stats_test(void)
>  	return TEST_SUCCESS;
>  }
> 
> -static void
> -adapter_free(void)
> -{
> -	rte_event_eth_rx_adapter_free(TEST_INST_ID);
> -}
> -
>  static int
>  adapter_create_free(void)
>  {
> diff --git a/lib/eventdev/rte_event_eth_rx_adapter.c
> b/lib/eventdev/rte_event_eth_rx_adapter.c
> index 93bed18e93..fe84471523 100644
> --- a/lib/eventdev/rte_event_eth_rx_adapter.c
> +++ b/lib/eventdev/rte_event_eth_rx_adapter.c
> @@ -2493,6 +2493,7 @@ rxa_config_params_validate(struct
> rte_event_eth_rx_adapter_params *rxa_params,
>  		/* use default values if rxa_params is NULL */
>  		temp_params->event_buf_size = ETH_EVENT_BUFFER_SIZE;
>  		temp_params->use_queue_event_buf = false;
> +		return 0;
>  	} else if (!rxa_params->use_queue_event_buf &&
>  		    rxa_params->event_buf_size == 0) {
>  		RTE_EDEV_LOG_ERR("event buffer size can't be zero\n");
> --
> 2.23.0