From: Markus Armbruster <armbru@redhat.com>
Date: Mon, 26 May 2008 22:31:10 +0000 (+0100)
Subject: xen pvfb: Zero unused bytes in events sent to backend
X-Git-Tag: firefly_0821_release~19697^2~253^24~35
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f4ad1ebd7a0fae2782ef9f76c0b94b536742c3e8;p=firefly-linux-kernel-4.4.55.git

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 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;