From c3969e85efe4740b41cf8e262e5637d81f76a3cc Mon Sep 17 00:00:00 2001
From: Michael Carlberg <c@rlberg.se>
Date: Sat, 29 Oct 2016 21:06:38 +0200
Subject: [PATCH] fix(fontmanager): Add safety check

---
 include/components/x11/fontmanager.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/components/x11/fontmanager.hpp b/include/components/x11/fontmanager.hpp
index 80c6da3a..697c1bac 100644
--- a/include/components/x11/fontmanager.hpp
+++ b/include/components/x11/fontmanager.hpp
@@ -220,6 +220,8 @@ class fontmanager {
     } else {
       if (chr < font->char_min || chr > font->char_max)
         return false;
+      if (static_cast<size_t>(chr - font->char_min) >= font->width_lut.size())
+        return false;
       if (font->width_lut[chr - font->char_min].character_width == 0)
         return false;
       return true;