ACK: [PATCH] opal: add check for the number of regions

[Alex Hung]

On 2020-07-08 2:33 p.m., Colin King wrote:
> From: Colin Ian King <colin.king at canonical.com>
> 
> Add a sanity check for the number of regions, the function
> fwts_dt_stringlist_count can return 0 or -ve values and this
> will cause issues with a later malloc.
> 
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
> ---
>  src/opal/reserv_mem.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/src/opal/reserv_mem.c b/src/opal/reserv_mem.c
> index f243fb2e..5c15a7fc 100644
> --- a/src/opal/reserv_mem.c
> +++ b/src/opal/reserv_mem.c
> @@ -143,6 +143,11 @@ static int reserv_mem_limits_test(fwts_framework *fw)
>  	/* Get the number of memory reserved regions */
>  	nr_regions = fwts_dt_stringlist_count(fw, fw->fdt, offset,
>  				"reserved-names");
> +	if (nr_regions < 0) {
> +		fwts_failed(fw, LOG_LEVEL_MEDIUM, "DTNoRegions",
> +			"DT No regions");
> +		return FWTS_ERROR;
> +	}
>  
>  	/* Check for the reservd-names property */
>  	region_names = (const char *)fdt_getprop(fw->fdt, offset,
> 

Acked-by: Alex Hung <alex.hung at canonical.com>