Re: [PATCH 1/2] osm_prtn_config.c: Sanity check the value of mgroup_flag flag

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On Thu, Aug 30, 2018 at 10:45:35AM +0800, Honggang LI wrote:
> From: Honggang Li <honli@xxxxxxxxxx>
> 
> As all flags are unsigned integer in different size, sanity check the
> value before covert the value to unsigned integer with 'strtoul'.
> 
> Signed-off-by: Honggang Li <honli@xxxxxxxxxx>
> ---
>  opensm/osm_prtn_config.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/opensm/osm_prtn_config.c b/opensm/osm_prtn_config.c
> index f76ad4d4..be81e794 100644
> --- a/opensm/osm_prtn_config.c
> +++ b/opensm/osm_prtn_config.c
> @@ -273,6 +273,20 @@ static int parse_group_flag(unsigned lineno, osm_log_t * p_log,
>  {
>  	int rc = 0;
>  	int len = strlen(flag);
> +
> +	char *tmp = val;
> +	while (NULL != tmp && '\0' != *tmp) {

Better to ask:
	while (tmp && ..

> +		if (!isxdigit(*tmp)) {
> +			OSM_LOG(p_log, OSM_LOG_VERBOSE,
> +				"PARSE WARN: line %d: "
> +				"suspicious val=(%s) detected. "
> +				"flag=(%s)\n", lineno, val, flag);
> +			return rc;
> +		}
> +		tmp++;
> +	}
> +	tmp = NULL;

Since obviously tmp was defined in this patch i don't see a reason to set
it to NULL here.

> +
>  	if (!strncmp(flag, "mtu", len)) {
>  		rc = 1;
>  		if (!val || (flags->mtu = strtoul(val, NULL, 0)) == 0)
> -- 
> 2.14.4
> 



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