[freetype2] master 17196b7: [truetype] Integer overflow.

[Werner LEMBERG]

branch: master
commit 17196b7c747cf8a7309efda54c99a89d456f0512
Author: Werner Lemberg <address@hidden>
Commit: Werner Lemberg <address@hidden>

    [truetype] Integer overflow.
    
    Reported as
    
      https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2868
    
    * src/truetype/ttinterp.c (Ins_ALIGNRP): Use NEG_LONG.
---
 ChangeLog               | 10 ++++++++++
 src/truetype/ttinterp.c |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 30f18b7..987d573 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2017-06-27  Werner Lemberg  <address@hidden>
+
+       [truetype] Integer overflow.
+
+       Reported as
+
+         https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2868
+
+       * src/truetype/ttinterp.c (Ins_ALIGNRP): Use NEG_LONG.
+
 2017-08-05  Werner Lemberg  <address@hidden>
 
        [base, truetype] New function `FT_Get_Var_Axis_Flags'.
diff --git a/src/truetype/ttinterp.c b/src/truetype/ttinterp.c
index 8636d5e..bc20155 100644
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -6421,7 +6421,7 @@
         distance = PROJECT( exc->zp1.cur + point,
                             exc->zp0.cur + exc->GS.rp0 );
 
-        exc->func_move( exc, &exc->zp1, point, -distance );
+        exc->func_move( exc, &exc->zp1, point, NEG_LONG( distance ) );
       }
 
       exc->GS.loop--;