[freetype2] master 87fefc5: [type42] Fix heap buffer overflow (#46269).

[Werner LEMBERG]

branch: master
commit 87fefc594eeea8064766b397c93d685e261e2989
Author: Werner Lemberg <address@hidden>
Commit: Werner Lemberg <address@hidden>

    [type42] Fix heap buffer overflow (#46269).
    
    * src/type42/t42parse.c (t42_parse_sfnts): Fix off-by-one error in
    bounds checking.
---
 ChangeLog             |    7 +++++++
 src/type42/t42parse.c |    2 +-
 2 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 5d25e0f..e4ebfdb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2015-10-21  Werner Lemberg  <address@hidden>
+
+       [type42] Fix heap buffer overflow (#46269).
+
+       * src/type42/t42parse.c (t42_parse_sfnts): Fix off-by-one error in
+       bounds checking.
+
 2015-10-21  Dave Arnold  <address@hidden>
 
        [cff] Fix limit in assert for max hints.
diff --git a/src/type42/t42parse.c b/src/type42/t42parse.c
index 3bcf97e..5e352a2 100644
--- a/src/type42/t42parse.c
+++ b/src/type42/t42parse.c
@@ -640,7 +640,7 @@
 
         string_buf = parser->root.cursor + 1;   /* one space after `RD' */
 
-        if ( (FT_ULong)( limit - parser->root.cursor ) < string_size )
+        if ( (FT_ULong)( limit - parser->root.cursor ) <= string_size )
         {
           FT_ERROR(( "t42_parse_sfnts: too much binary data\n" ));
           error = FT_THROW( Invalid_File_Format );