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$NetBSD: patch-CVE-2016-10219,v 1.1 2017/04/18 22:07:07 tez Exp $
Patch for CVE-2016-10219 from
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=4bef1a1d32e29b68855616020dbff574b9cda08f;hp=0aeb0bbd41cc16e70ab6e4b1d56e0c510bf2a758
--- base/gxfill.c.orig 2017-04-05 20:56:07.869067200 +0000
+++ base/gxfill.c
@@ -1743,7 +1743,7 @@ intersect(active_line *endp, active_line
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",
@@ -1752,7 +1752,7 @@ intersect(active_line *endp, active_line
/* 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;
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