[PATCH] net/af_packet: fix qpairs argument upper bound check

[Stephen Hemminger]

On Wed,  3 Jun 2026 07:42:18 +0300
Denis Sergeev <denserg.edu at gmail.com> wrote:

> diff --git a/drivers/net/af_packet/rte_eth_af_packet.c b/drivers/net/af_packet/rte_eth_af_packet.c
> index 0ee94e71ea..ebf015dd9a 100644
> --- a/drivers/net/af_packet/rte_eth_af_packet.c
> +++ b/drivers/net/af_packet/rte_eth_af_packet.c
> @@ -1169,7 +1169,7 @@ rte_eth_from_packet(struct rte_vdev_device *dev,
>  		pair = &kvlist->pairs[k_idx];
>  		if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
>  			qpairs = atoi(pair->value);
> -			if (qpairs < 1) {
> +			if (qpairs < 1 || qpairs > RTE_MAX_QUEUES_PER_PORT) {
>  				PMD_LOG(ERR,
>  					"%s: invalid qpairs value",
>  				        name);
> -- 

I would rather see atoi() not used in DPDK, it accepts too much and does not do
enough validation. Replace with strtoul() instead.