blobmsg_json: fix buffer growing on blobmsg json formatting

diff --git a/blobmsg_json.c b/blobmsg_json.c
index d4f6846..f166358 100644 (file)
--- a/blobmsg_json.c
+++ b/blobmsg_json.c
@@ -108,7 +108,7 @@ static bool blobmsg_puts(struct strbuf *s, const char *c, int len)
                return true;
 
        if (s->pos + len >= s->len) {
-               s->len += 16;
+               s->len += 16 + len;
                s->buf = realloc(s->buf, s->len);
                if (!s->buf)
                        return false;