From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 20 Aug 2016 20:33:10 +0000 (-0400)
Subject: mn10300: copy_from_user() should zero on access_ok() failure...
X-Git-Tag: v4.4.22~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=22782f043e5900e14928760de0f01ef6935d7e8d;p=profile%2Fcommon%2Fplatform%2Fkernel%2Flinux-artik7.git

mn10300: copy_from_user() should zero on access_ok() failure...

commit ae7cc577ec2a4a6151c9e928fd1f595d953ecef1 upstream.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/mn10300/lib/usercopy.c b/arch/mn10300/lib/usercopy.c
index 7826e6c..ce8899e 100644
--- a/arch/mn10300/lib/usercopy.c
+++ b/arch/mn10300/lib/usercopy.c
@@ -9,7 +9,7 @@
  * as published by the Free Software Foundation; either version
  * 2 of the Licence, or (at your option) any later version.
  */
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 unsigned long
 __generic_copy_to_user(void *to, const void *from, unsigned long n)
@@ -24,6 +24,8 @@ __generic_copy_from_user(void *to, const void *from, unsigned long n)
 {
 	if (access_ok(VERIFY_READ, from, n))
 		__copy_user_zeroing(to, from, n);
+	else
+		memset(to, 0, n);
 	return n;
 }