[PATCH v3] app/test-fib: fix possible division by zero

[Kevin Traynor]

On 27/01/2022 18:08, Vladimir Medvedkin wrote:
> This patch fixes the division by 0,
> which occurs if the number of routes is less than 10.
> Can be triggered by passing -n argument with value < 10:
> 
> ./dpdk-test-fib -- -n 9
> ...
> Floating point exception (core dumped)
> 
> Fixes: 103809d032cd ("app/test-fib: add test application for FIB")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin at intel.com>
> ---

This looks a better solution, and thanks for adding the tags.

Acked-by: Kevin Traynor <ktraynor at redhat.com>

>   app/test-fib/main.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/app/test-fib/main.c b/app/test-fib/main.c
> index ecd420116a..067c5284f9 100644
> --- a/app/test-fib/main.c
> +++ b/app/test-fib/main.c
> @@ -711,6 +711,10 @@ parse_opts(int argc, char **argv)
>   				print_usage();
>   				rte_exit(-EINVAL, "Invalid option -n\n");
>   			}
> +
> +			if (config.nb_routes < config.print_fract)
> +				config.print_fract = config.nb_routes;
> +
>   			break;
>   		case 'd':
>   			distrib_string = optarg;
> @@ -1242,6 +1246,10 @@ main(int argc, char **argv)
>   		config.nb_routes = 0;
>   		while (fgets(line, sizeof(line), fr) != NULL)
>   			config.nb_routes++;
> +
> +		if (config.nb_routes < config.print_fract)
> +			config.print_fract = config.nb_routes;
> +
>   		rewind(fr);
>   	}
>   
>