commit 54abd22891bd51ef8b533b24df53b3019b5cee81
author Werner Lemberg <wl@gnu.org> Sat Nov 15 09:05:22 2014 +0100
committer Werner Lemberg <wl@gnu.org> Sat Nov 15 09:05:22 2014 +0100
tree c862e9b419ee253bc5f1bd5f1ee9dafd81347457
parent 257c270bd25e15890190a28a1456e7623bba4439

[sfnt] Fix Savannah bug #43597.

* src/sfnt/pngshim.c (Load_SBit_Png): Protect against too large
bitmaps.

src/sfnt/pngshim.c

diff --git a/src/sfnt/pngshim.c b/src/sfnt/pngshim.c
index 9afbe5a..fdb15d4 100644
--- a/src/sfnt/pngshim.c
+++ b/src/sfnt/pngshim.c
@@ -269,6 +269,13 @@
       map->pitch      = map->width * 4;
       map->num_grays  = 256;
 
+      /* reject too large bitmaps similarly to the rasterizer */
+      if ( map->rows > 0x7FFF || map->width > 0x7FFF )
+      {
+        error = FT_THROW( Array_Too_Large );
+        goto DestroyExit;
+      }
+
       size = map->rows * map->pitch;
 
       error = ft_glyphslot_alloc_bitmap( slot, size );