File pixman-bnc853824-bfo67484-CVE-2013-6425-fix-underflow.patch of Package pixman.openSUSE_13.1_Update

From 8fc26cba9b11d4ab65c745915832598b50871fde Mon Sep 17 00:00:00 2001
From: Ritesh Khadgaray <khadgaray@gmail.com>
Date: Wed, 23 Oct 2013 17:29:07 -0400
Subject: [PATCH] pixman_trapezoid_valid(): Fix underflow when bottom is close
 to MIN_INT

If t->bottom is close to MIN_INT (probably invalid value), subtracting
top can lead to underflow which causes crashes.  Attached patch will
fix the issue.

This fixes bug 67484.
---
 pixman/pixman.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pixman/pixman.h b/pixman/pixman.h
index 7ff9fb5..509ba5e 100644
--- a/pixman/pixman.h
+++ b/pixman/pixman.h
@@ -1030,7 +1030,7 @@ struct pixman_triangle
 #define pixman_trapezoid_valid(t)				   \
     ((t)->left.p1.y != (t)->left.p2.y &&			   \
      (t)->right.p1.y != (t)->right.p2.y &&			   \
-     (int) ((t)->bottom - (t)->top) > 0)
+     ((t)->bottom > (t)->top))
 
 struct pixman_span_fix
 {
-- 
1.8.1.4