barriers: forbid point barrierswhot-barriers

Signed-off-by: Adam Jackson <ajax@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/xfixes/cursor.c b/xfixes/cursor.c
index c6f3281a9..0072d5589 100644
--- a/xfixes/cursor.c
+++ b/xfixes/cursor.c
@@ -1302,6 +1302,10 @@ ProcXFixesCreatePointerBarrier (ClientPtr client)
     if (!barrier_is_horizontal(&b) && !barrier_is_vertical(&b))
 	return BadValue;
 
+    /* no 0-sized barriers */
+    if (barrier_is_horizontal(&b) && barrier_is_vertical(&b))
+	return BadValue;
+
     if (!(barrier = CreatePointerBarrierClient(pWin->drawable.pScreen,
 					       client, stuff)))
 	return BadAlloc;