From 001b77f0dd1cefb863de5925bbdefe310c29e2c5 Mon Sep 17 00:00:00 2001
From: Yuki Izumi <ashe@kivikakk.ee>
Date: Wed, 12 Jul 2017 18:37:48 +1000
Subject: [PATCH] > 32 nested balanced parens in a link is bananas

---
 src/inlines.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/inlines.c b/src/inlines.c
index 2f907b185..e30c2affe 100644
--- a/src/inlines.c
+++ b/src/inlines.c
@@ -871,6 +871,8 @@ static bufsize_t manual_scan_link_url(cmark_chunk *input, bufsize_t offset) {
       else if (input->data[i] == '(') {
         ++nb_p;
         ++i;
+        if (nb_p > 32)
+          return -1;
       } else if (input->data[i] == ')') {
         if (nb_p == 0)
           break;