From aede7704230968885a33a8842c8db2f157137e1d Mon Sep 17 00:00:00 2001
From: Kevin <git@k-ten.de>
Date: Sun, 18 Jul 2021 12:52:14 +0200
Subject: [PATCH] Limit recursion when parsing URL in document-blocked page

Related Issue: https://github.com/uBlockOrigin/uBlock-issues/issues/1649
---
 src/js/main-blocked.js | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/src/js/main-blocked.js b/src/js/main-blocked.js
index ed617645..52793009 100644
--- a/src/js/main-blocked.js
+++ b/src/js/main-blocked.js
@@ -87,21 +87,22 @@ uDom('.what').text(details.url);
         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; }
 
-        const pos = rawURL.indexOf('?');
+        let pos = rawURL.indexOf('?');
         const li = liFromParam(
-            vAPI.i18n('mainBlockedNoParamsPrompt'),
+            vAPI.i18n('docblockedNoParamsPrompt'),
             rawURL.slice(0, pos)
         );
         parentNode.appendChild(li);
 
         const params = a.search.slice(1).split('&');
-        for ( let i = 0; i < params.length; i++ ) {
-            const param = params[i];
+        for ( const param of params ) {
             let pos = param.indexOf('=');
             if ( pos === -1 ) {
                 pos = param.length;
@@ -109,9 +110,9 @@ uDom('.what').text(details.url);
             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);