Re: [dpdk-dev] [v5] telemetry: fix json output buffer size

[Thomas Monjalon <thomas@monjalon.net>]

29/09/2021 06:18, Gowrishankar Muthukrishnan:
> Fix json output buffer size for an actual data length.
> 
> Fixes: 52af6ccb2b39 ("telemetry: add utility functions for creating JSON")

Please could you give a bit more explanations?
What was not working and why?

[...]
> - * This function is not for use for values larger than 1k.
> + * This function is not for use for values larger than given buffer length.
>   */
>  __rte_format_printf(3, 4)
>  static inline int
>  __json_snprintf(char *buf, const int len, const char *format, ...)
>  {
> -	char tmp[1024];
> +	char tmp[len];
>  	va_list ap;
>  	int ret;