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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))
--
2.22.0
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