classify: fix crash when update nonexistent classify table.

[vpp.git] / src / vnet / classify / vnet_classify.c

diff --git a/src/vnet/classify/vnet_classify.c b/src/vnet/classify/vnet_classify.c
index 305521b..8c3b290 100644 (file)
--- a/src/vnet/classify/vnet_classify.c
+++ b/src/vnet/classify/vnet_classify.c
@@ -777,8 +777,10 @@ vnet_classify_add_del_table (vnet_classify_main_t *cm, const u8 *mask,
       else                     /* update */
        {
          vnet_classify_main_t *cm = &vnet_classify_main;
-         t = pool_elt_at_index (cm->tables, *table_index);
+         if (pool_is_free_index (cm->tables, *table_index))
+           return VNET_API_ERROR_CLASSIFY_TABLE_NOT_FOUND;
 
+         t = pool_elt_at_index (cm->tables, *table_index);
          t->next_table_index = next_table_index;
        }
       return 0;