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s390/uaccess: Enable hardened usercopy

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Enables CONFIG_HARDENED_USERCOPY checks on s390.

Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook
2016-07-07 11:38:39 -07:00
parent 9d9208a158
commit 97433ea4fd
2 changed files with 3 additions and 0 deletions
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arch/s390/lib/uaccess.c
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@@ -104,6 +104,7 @@ static inline unsigned long copy_from_user_mvcp(void *x, const void __user *ptr,
unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)
{
check_object_size(to, n, false);
if (static_branch_likely(&have_mvcos))
return copy_from_user_mvcos(to, from, n);
return copy_from_user_mvcp(to, from, n);
@@ -177,6 +178,7 @@ static inline unsigned long copy_to_user_mvcs(void __user *ptr, const void *x,
unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n)
{
check_object_size(from, n, true);
if (static_branch_likely(&have_mvcos))
return copy_to_user_mvcos(to, from, n);
return copy_to_user_mvcs(to, from, n);