json: fix oom when adding a long string

2021-02-26 10:11:28 +01:00 · 2021-02-26 10:11:28 +01:00 · 8af5764a9c
parent d753ee27a2
commit 8af5764a9c
1 changed files with 3 additions and 2 deletions
--- a/common/json_stream.c
+++ b/common/json_stream.c
@ -194,8 +194,9 @@ void json_add_jsonstr(struct json_stream *js,
 	size_t len = strlen(jsonstr);

 	p = json_member_direct(js, fieldname, len);
-
-	memcpy(p, jsonstr, len);
+	/* Could be OOM! */
+	if (p)
+		memcpy(p, jsonstr, len);
 }

 /* This is where we read the json_stream and write it to conn */