1 files changed, 49 insertions, 0 deletions

diff --git a/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-10219.patch b/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-10219.patch
new file mode 100644
index 0000000000..574abe0e42
--- /dev/null
+++ b/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-10219.patch
@@ -0,0 +1,49 @@
+From 4bef1a1d32e29b68855616020dbff574b9cda08f Mon Sep 17 00:00:00 2001
+From: Robin Watts <Robin.Watts@artifex.com>
+Date: Thu, 29 Dec 2016 15:57:43 +0000
+Subject: [PATCH] Bug 697453: Avoid divide by 0 in scan conversion code.
+
+Arithmetic overflow due to extreme values in the scan conversion
+code can cause a division by 0.
+
+Avoid this with a simple extra check.
+
+  dx_old=cf814d81
+  endp->x_next=b0e859b9
+  alp->x_next=8069a73a
+
+leads to dx_den = 0
+
+Upstream-Status: Backport
+CVE: CVE-2016-10219
+
+Signed-off-by: Catalin Enache <catalin.enache@windriver.com>
+---
+ base/gxfill.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/base/gxfill.c b/base/gxfill.c
+index 99196c0..2f81bb0 100644
+--- a/base/gxfill.c
++++ b/base/gxfill.c
+@@ -1741,7 +1741,7 @@ intersect(active_line *endp, active_line *alp, fixed y, fixed y1, fixed *p_y_new
+     fixed dx_old = alp->x_current - endp->x_current;
+     fixed dx_den = dx_old + endp->x_next - alp->x_next;
+ 
+-    if (dx_den <= dx_old)
++    if (dx_den <= dx_old || dx_den == 0)
+         return false; /* Intersection isn't possible. */
+     dy = y1 - y;
+     if_debug3('F', "[F]cross: dy=%g, dx_old=%g, dx_new=%g\n",
+@@ -1750,7 +1750,7 @@ intersect(active_line *endp, active_line *alp, fixed y, fixed y1, fixed *p_y_new
+     /* Do the computation in single precision */
+     /* if the values are small enough. */
+     y_new =
+-        ((dy | dx_old) < 1L << (size_of(fixed) * 4 - 1) ?
++        (((ufixed)(dy | dx_old)) < (1L << (size_of(fixed) * 4 - 1)) ?
+          dy * dx_old / dx_den :
+          (INCR_EXPR(mq_cross), fixed_mult_quo(dy, dx_old, dx_den)))
+         + y;
+-- 
+2.10.2
+