From ae7cc577ec2a4a6151c9e928fd1f595d953ecef1 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 20 Aug 2016 16:33:10 -0400 Subject: [PATCH] mn10300: copy_from_user() should zero on access_ok() failure... Cc: stable@vger.kernel.org Signed-off-by: Al Viro --- arch/mn10300/lib/usercopy.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/mn10300/lib/usercopy.c b/arch/mn10300/lib/usercopy.c index 7826e6c364e7..ce8899e5e171 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 +#include 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; }