From 62c1a32976d571f3ced1812b8b96ed5a8e658b4a Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter@cs.unisa.edu.au>
Date: Sat, 31 May 2008 10:24:37 +0930
Subject: [PATCH] dix: null out dummyDev, otherwise Xephyr dereferences random
 pointers.

SendEventToAllWindow eventually causes a IsInterferingGrab(), which attempts
to dereference dev->deviceGrab.grab.
---
 dix/devices.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dix/devices.c b/dix/devices.c
index 60d48b25e..08520eb54 100644
--- a/dix/devices.c
+++ b/dix/devices.c
@@ -376,7 +376,8 @@ ActivateDevice(DeviceIntPtr dev)
     ev.time = currentTime.milliseconds;
     ev.devchange = DeviceAdded;
     ev.deviceid = dev->id;
-    dummyDev.id = 0;
+
+    memset(&dummyDev, 0, sizeof(DeviceIntRec));
     SendEventToAllWindows(&dummyDev, DevicePresenceNotifyMask,
                           (xEvent *) &ev, 1);