metrics: add check for invalid key

This patchset adds a check to rte_metrics_update_values()
that prevents the updating of metrics when presented with
an invalid metric key. Previously, doing the latter could
result in a crash.

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 258f058..b5638f5 100644 (file)
--- a/lib/librte_metrics/rte_metrics.c
+++ b/lib/librte_metrics/rte_metrics.c
@@ -159,6 +159,11 @@ rte_metrics_update_values(int port_id,
        stats = memzone->addr;
 
        rte_spinlock_lock(&stats->lock);
+
+       if (key >= stats->cnt_stats) {
+               rte_spinlock_unlock(&stats->lock);
+               return -EINVAL;
+       }
        idx_metric = key;
        cnt_setsize = 1;
        while (idx_metric < stats->cnt_stats) {