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>

diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
index 5553e517563e478eb070ac439fb954f244d874b6..291eef6955947cd4876b0b815e509a796f4175e5 100644 (file)
--- 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;