From 07f40a04df28e9ee6318411beb71eedc7cd6e288 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Mon, 2 Feb 2009 11:00:30 +1000
Subject: Protect against zero-sized property values. #19882

X.Org Bug 19882 <http://bugs.freedesktop.org/show_bug.cgi?id=19882>

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---
 src/draglock.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/draglock.c')

diff --git a/src/draglock.c b/src/draglock.c
index 631da17..8e97b0d 100644
--- a/src/draglock.c
+++ b/src/draglock.c
@@ -243,7 +243,9 @@ EvdevDragLockSetProperty(DeviceIntPtr dev, Atom atom, XIPropertyValuePtr val,
                     return BadValue;
         }
 
-        if (val->size == 1)
+        if (val->size == 0)
+            return BadMatch;
+        else if (val->size == 1)
         {
             int meta = *((CARD8*)val->data);
             if (meta > EVDEV_MAXBUTTONS)
-- 
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