json: Make it safe to pass null pointers to json_equal().

Signed-off-by: Ben Pfaff <[email protected]> Reviewed-by: Yifeng Sun <[email protected]> Acked-by: Justin Pettit <[email protected]>
svpn · Feb 6, 2018 · f15a232 · f15a232
1 parent 303566c
commit f15a232
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/lib/json.c b/lib/json.c
@@ -576,9 +576,9 @@ json_equal(const struct json *a, const struct json *b)
 {
     if (a == b) {
         return true;
-    }
-
-    if (a->type != b->type) {
+    } else if (!a || !b) {
+        return false;
+    } else if (a->type != b->type) {
         return false;
     }