From 29269617abe87778ee4a0d14dd03947364ead476 Mon Sep 17 00:00:00 2001
From: gorhill <rhill@raymondhill.net>
Date: Mon, 23 Mar 2015 18:49:28 -0400
Subject: [PATCH] This addresses #1082

---
 src/js/dynamic-net-filtering.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/js/dynamic-net-filtering.js b/src/js/dynamic-net-filtering.js
index 7b6666745..d22e714db 100644
--- a/src/js/dynamic-net-filtering.js
+++ b/src/js/dynamic-net-filtering.js
@@ -76,6 +76,7 @@ var nameToActionMap = {
 // For performance purpose, as simple tests as possible
 var reHostnameVeryCoarse = /[g-z_-]/;
 var reIPv4VeryCoarse = /\.\d+$/;
+var reBadHostname = /[^0-9a-z_.\[\]:-]/;
 
 // http://tools.ietf.org/html/rfc5952
 // 4.3: "MUST be represented in lowercase"
@@ -539,6 +540,12 @@ Matrix.prototype.fromString = function(text, append) {
         srcHostname = punycode.toASCII(fields[0]);
         desHostname = punycode.toASCII(fields[1]);
 
+        // https://github.com/gorhill/uBlock/issues/1082
+        // Discard rules with invalid hostnames
+        if ( reBadHostname.test(srcHostname) || reBadHostname.test(desHostname) ) {
+            continue;
+        }
+
         type = fields[2];
         if ( typeBitOffsets.hasOwnProperty(type) === false ) {
             continue;