[PATCH] examples/ethtool: fix buffer size for pkt pool name

[Stephen Hemminger]

On Wed, 3 Dec 2025 13:01:57 +0200
Shani Peretz <shperetz at nvidia.com> wrote:

> Increase str_name buffer size from 16 to 32 bytes to fit the provided
> format. The previous size was insufficient as the format
> string "pkt_pool%i" can produce up to 19 bytes (8 for "pkt_pool",
> up to 10 for integer value, and 1 for null terminator).
> 
> Fixes: bda68ab9d1e7 ("examples/ethtool: add user-space ethtool sample application")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Shani Peretz <shperetz at nvidia.com>
> ---
>  examples/ethtool/ethtool-app/main.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/examples/ethtool/ethtool-app/main.c b/examples/ethtool/ethtool-app/main.c
> index 1f011a9321..06605b4202 100644
> --- a/examples/ethtool/ethtool-app/main.c
> +++ b/examples/ethtool/ethtool-app/main.c
> @@ -92,7 +92,7 @@ static void setup_ports(struct app_config *app_cfg, int cnt_ports)
>  	int size_pktpool;
>  	struct rte_eth_conf cfg_port;
>  	struct rte_eth_dev_info dev_info;
> -	char str_name[16];
> +	char str_name[32];

Don't use hard coded constant, instead use RTE_MEMPOOL_NAMESIZE which is
not 32, but 32 - 4 + 1 = 29