1 files changed, 7 insertions, 0 deletions
diff --git a/src/type42/t42parse.c b/src/type42/t42parse.c
index 009121fc8..edd27a850 100644
--- a/src/type42/t42parse.c
+++ b/src/type42/t42parse.c
@@ -284,6 +284,13 @@
     matrix->xy = temp[2];
     matrix->yy = temp[3];
 
+    if ( !FT_Matrix_Check( matrix ) )
+    {
+      FT_ERROR(( "t42_parse_font_matrix: invalid font matrix\n" ));
+      parser->root.error = FT_THROW( Invalid_File_Format );
+      return;
+    }
+
     /* note that the offsets must be expressed in integer font units */
     offset->x = temp[4] >> 16;
     offset->y = temp[5] >> 16;