From e0aa762cac39d18aa60938a3d1f7f6b42fcb2cdf Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 22 Feb 2016 22:33:09 +0300
Subject: [PATCH] Staging: gdm72xx: underflow bug in gdm_wimax_ioctl_get_data()

"size" here should be unsigned, otherwise we might end up trying to copy
negative bytes in gdm_wimax_ioctl_get_data() resulting in an information
leak.

Reported-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/gdm72xx/wm_ioctl.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/gdm72xx/wm_ioctl.h b/drivers/staging/gdm72xx/wm_ioctl.h
index 631cb1d23c7e..032cb073461c 100644
--- a/drivers/staging/gdm72xx/wm_ioctl.h
+++ b/drivers/staging/gdm72xx/wm_ioctl.h
@@ -74,12 +74,12 @@ struct fsm_s {
 };
 
 struct data_s {
-	int	size;
+	unsigned int size;
 	void	*buf;
 };
 
 struct udata_s {
-	int		size;
+	unsigned int	size;
 	void __user	*buf;
 };
 
-- 
2.39.2