diff options
| author | Kees Cook <keescook@chromium.org> | 2016-07-07 11:38:39 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2016-07-26 14:41:52 -0700 |
| commit | 97433ea4fda62349bfa42089455593cbcb57e06c (patch) | |
| tree | 308fd5074718b4dfa06d399c4dbf32cdde5956a3 /arch/s390 | |
| parent | 9d9208a15800f9f06f102f9aac1e8b323c3b8575 (diff) | |
| download | linux-97433ea4fda62349bfa42089455593cbcb57e06c.tar.bz2 | |
s390/uaccess: Enable hardened usercopy
Enables CONFIG_HARDENED_USERCOPY checks on s390.
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/Kconfig | 1 | ||||
| -rw-r--r-- | arch/s390/lib/uaccess.c | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index a8c259059adf..9f694311c9ed 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -122,6 +122,7 @@ config S390 select HAVE_ALIGNED_STRUCT_PAGE if SLUB select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_EARLY_PFN_TO_NID + select HAVE_ARCH_HARDENED_USERCOPY select HAVE_ARCH_JUMP_LABEL select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES select HAVE_ARCH_SECCOMP_FILTER diff --git a/arch/s390/lib/uaccess.c b/arch/s390/lib/uaccess.c index ae4de559e3a0..6986c20166f0 100644 --- a/arch/s390/lib/uaccess.c +++ b/arch/s390/lib/uaccess.c @@ -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); |