From 490f8979a260c16b1df055eab386345da18a2d54 Mon Sep 17 00:00:00 2001
From: Matthias Clasen <mclasen@redhat.com>
Date: Wed, 10 Jul 2019 20:26:23 -0400
Subject: [PATCH] bidi: Be safer against bad input

Don't run off the end of an array that we
allocated to certain length.

Closes: https://gitlab.gnome.org/GNOME/pango/issues/342
---
 pango/pango-bidi-type.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pango/pango-bidi-type.c b/pango/pango-bidi-type.c
index 3e46b66c..5c02dbbb 100644
--- a/pango/pango-bidi-type.c
+++ b/pango/pango-bidi-type.c
@@ -181,8 +181,11 @@ pango_log2vis_get_embedding_levels (const gchar    *text,
   for (i = 0, p = text; p < text + length; p = g_utf8_next_char(p), i++)
     {
       gunichar ch = g_utf8_get_char (p);
-      FriBidiCharType char_type;
-      char_type = fribidi_get_bidi_type (ch);
+      FriBidiCharType char_type = fribidi_get_bidi_type (ch);
+
+      if (i == n_chars)
+        break;
+
       bidi_types[i] = char_type;
       ored_types |= char_type;
       if (FRIBIDI_IS_STRONG (char_type))
-- 
2.21.0