xen pvfb: Zero unused bytes in events sent to backend

This isn't a security flaw (the backend can see all our memory
anyway).  But it's the right thing to do all the same.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
index 5553e517563e..291eef695594 100644
--- a/drivers/video/xen-fbfront.c
+++ b/drivers/video/xen-fbfront.c
@@ -61,6 +61,7 @@ static void xenfb_do_update(struct xenfb_info *info,
         union xenfb_out_event event;
         u32 prod;
 
+        memset(&event, 0, sizeof(event));
         event.type = XENFB_TYPE_UPDATE;
         event.update.x = x;
         event.update.y = y;