metrics: disallow null as metric name

This patch adds a sanity check so that names passed into
rte_metrics_reg_names() and the wrapper rte_metrics_reg_name()
cannot be NULL.

Fixes: 349950ddb9c5 ("metrics: add information metrics library")
Cc: stable@dpdk.org
Signed-off-by: Remy Horton <remy.horton@intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/lib/librte_metrics/rte_metrics.c b/lib/librte_metrics/rte_metrics.c
index 038f58b..99a96b6 100644 (file)
--- a/lib/librte_metrics/rte_metrics.c
+++ b/lib/librte_metrics/rte_metrics.c
@@ -96,6 +96,9 @@ rte_metrics_reg_names(const char * const *names, uint16_t cnt_names)
        /* Some sanity checks */
        if (cnt_names < 1 || names == NULL)
                return -EINVAL;
+       for (idx_name = 0; idx_name < cnt_names; idx_name++)
+               if (names[idx_name] == NULL)
+                       return -EINVAL;
 
        memzone = rte_memzone_lookup(RTE_METRICS_MEMZONE_NAME);
        if (memzone == NULL)