[PATCH v3 01/10] ethdev: check return result of rte_eth_dev_info_get

[Morten Brørup]

> From: okaya at kernel.org [mailto:okaya at kernel.org]
> Sent: Friday, 20 January 2023 05.42
> 
> From: Sinan Kaya <okaya at kernel.org>
> 
> rte_class_eth: eth_mac_cmp: The status of this call to
> rte_eth_dev_info_get
> is not checked, potentially leaving dev_info uninitialized.
> 
> Signed-off-by: Sinan Kaya <okaya at kernel.org>
> ---
>  lib/ethdev/rte_class_eth.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/lib/ethdev/rte_class_eth.c b/lib/ethdev/rte_class_eth.c
> index 838b3a8f9f..559ce22491 100644
> --- a/lib/ethdev/rte_class_eth.c
> +++ b/lib/ethdev/rte_class_eth.c
> @@ -50,8 +50,10 @@ eth_mac_cmp(const char *key __rte_unused,
>  	if (rte_ether_unformat_addr(value, &mac) < 0)
>  		return -1; /* invalid devargs value */
> 
> +	if (rte_eth_dev_info_get(data->port_id, &dev_info) < 0)
> +		return -1;
> +
>  	/* Return 0 if devargs MAC is matching one of the device MACs. */
> -	rte_eth_dev_info_get(data->port_id, &dev_info);
>  	for (index = 0; index < dev_info.max_mac_addrs; index++)
>  		if (rte_is_same_ether_addr(&mac, &data->mac_addrs[index]))
>  			return 0;
> --
> 2.25.1
> 

Although rte_eth_dev_info_get() can return various error codes, eth_mac_cmp() returns only 0 or -1, so this is correct.

Reviewed-by: Morten Brørup <mb at smartsharesystems.com>