commit 490f8979a260c16b1df055eab386345da18a2d54

Author: Matthias Clasen <mclasen@redhat.com>

Date:   Wed Jul 10 20:26:23 2019 -0400

    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

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))