File CVE-2014-9666.patch of Package ft2demos.449

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File CVE-2014-9666.patch of Package ft2demos.449

From 257c270bd25e15890190a28a1456e7623bba4439 Mon Sep 17 00:00:00 2001
From: Werner Lemberg <wl@gnu.org>
Date: Wed, 12 Nov 2014 20:42:13 +0000
Subject: [sfnt] Fix Savannah bug #43591.

* src/sfnt/ttsbit.c (tt_sbit_decoder_init): Protect against addition
and multiplication overflow.
---
diff --git a/src/sfnt/ttsbit.c b/src/sfnt/ttsbit.c
index da6b01b..b37bd7d 100644
--- a/src/sfnt/ttsbit.c
+++ b/src/sfnt/ttsbit.c
@@ -394,9 +394,11 @@
       p                          += 34;
       decoder->bit_depth          = *p;
 
-      if ( decoder->strike_index_array > face->sbit_table_size             ||
-           decoder->strike_index_array + 8 * decoder->strike_index_count >
-             face->sbit_table_size                                         )
+      /* decoder->strike_index_array +                               */
+      /*   8 * decoder->strike_index_count > face->sbit_table_size ? */
+      if ( decoder->strike_index_array > face->sbit_table_size           ||
+           decoder->strike_index_count >
+             ( face->sbit_table_size - decoder->strike_index_array ) / 8 )
         error = FT_THROW( Invalid_File_Format );
     }
 
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File CVE-2014-9666.patch of Package ft2demos.449

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