utils_ovs: fix potential NULL dereference

[collectd.git] / src / utils_ovs.c

diff --git a/src/utils_ovs.c b/src/utils_ovs.c
index 0ee05e0..a081fa9 100644 (file)
--- a/src/utils_ovs.c
+++ b/src/utils_ovs.c
@@ -1364,10 +1364,13 @@ yajl_val ovs_utils_get_map_value(yajl_val jval, const char *key) {
 
   /* check first element of the array */
   str_val = YAJL_GET_STRING(array_values[0]);
-  if (strcmp("map", str_val) != 0)
+  if (str_val == NULL || strcmp("map", str_val) != 0)
     return NULL;
 
   /* try to find map value by map key */
+  if (YAJL_GET_ARRAY(array_values[1]) == NULL)
+    return NULL;
+
   map_len = YAJL_GET_ARRAY(array_values[1])->len;
   map_values = YAJL_GET_ARRAY(array_values[1])->values;
   for (size_t i = 0; i < map_len; i++) {