# \[PATCH 4/5\] xen pvfb: Zero unused bytes in events sent to backend

- From: Markus Armbruster \<hidden\>
- Date: 2008-05-21 08:41:20 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2008/05/1103091
- Thread: https://ratatoskr.run/linux-input/2008/05/8909834/t.md

```text
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 <redacted>
---
 drivers/video/xen-fbfront.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c
index 5553e51..291eef6 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;
-- 
1.5.3.3


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```