From b75921c2fd0a704e7c3fc35453aa6223c0c91442 Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Tue, 6 Jul 2021 10:13:50 -0400
Subject: [PATCH] Limit recursion when parsing URL in document-blocked page

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/1649
---
 src/js/document-blocked.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/js/document-blocked.js b/src/js/document-blocked.js
index 08b2fd732..b0034ef3a 100644
--- a/src/js/document-blocked.js
+++ b/src/js/document-blocked.js
@@ -144,7 +144,9 @@ uDom.nodeFromId('why').textContent = details.fs;
         return s;
     };
 
-    const renderParams = function(parentNode, rawURL) {
+    // https://github.com/uBlockOrigin/uBlock-issues/issues/1649
+    //   Limit recursion.
+    const renderParams = function(parentNode, rawURL, depth = 0) {
         const a = document.createElement('a');
         a.href = rawURL;
         if ( a.search.length === 0 ) { return false; }
@@ -165,9 +167,9 @@ uDom.nodeFromId('why').textContent = details.fs;
             const name = safeDecodeURIComponent(param.slice(0, pos));
             const value = safeDecodeURIComponent(param.slice(pos + 1));
             const li = liFromParam(name, value);
-            if ( reURL.test(value) ) {
+            if ( depth < 2 && reURL.test(value) ) {
                 const ul = document.createElement('ul');
-                renderParams(ul, value);
+                renderParams(ul, value, depth + 1);
                 li.appendChild(ul);
             }
             parentNode.appendChild(li);