From a1ee26e624e6a7030ecb37a608190cb8e3d1f65b Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Thu, 6 Dec 2012 12:06:28 +1000
Subject: [PATCH] barriers: Don't allow releasing the pointer on other client's
 barriers

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Jasper St. Pierre <jstpierre@mecheye.net>
---
 Xi/xibarriers.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Xi/xibarriers.c b/Xi/xibarriers.c
index 86e811ea1..8f122537a 100644
--- a/Xi/xibarriers.c
+++ b/Xi/xibarriers.c
@@ -591,6 +591,9 @@ ProcXIBarrierReleasePointer(ClientPtr client)
             return err;
         }
 
+        if (CLIENT_ID(barrier_id) != client->index)
+            return BadAccess;
+
         barrier = container_of(b, struct PointerBarrierClient, barrier);
         if (barrier->barrier_event_id == event_id)
             barrier->release_event_id = event_id;