From 9e91db6b4abecd58647a5e984d538187f1c2ea09 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Thu, 6 Oct 2016 09:07:30 +0200 Subject: parisc: Add hardened usercopy feature Add hardened usercopy checks to parisc architecture and clean up indenting. Signed-off-by: Helge Deller --- arch/parisc/include/asm/uaccess.h | 48 +++++++++++++++++++++++++++------------ 1 file changed, 34 insertions(+), 14 deletions(-) (limited to 'arch/parisc/include/asm/uaccess.h') diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h index 482847865dac..9a2aee1b90fc 100644 --- a/arch/parisc/include/asm/uaccess.h +++ b/arch/parisc/include/asm/uaccess.h @@ -11,6 +11,7 @@ #include #include +#include #define VERIFY_READ 0 #define VERIFY_WRITE 1 @@ -201,10 +202,12 @@ extern long lstrnlen_user(const char __user *, long); #define clear_user lclear_user #define __clear_user lclear_user -unsigned long copy_to_user(void __user *dst, const void *src, unsigned long len); -#define __copy_to_user copy_to_user -unsigned long __copy_from_user(void *dst, const void __user *src, unsigned long len); -unsigned long copy_in_user(void __user *dst, const void __user *src, unsigned long len); +unsigned long __must_check __copy_to_user(void __user *dst, const void *src, + unsigned long len); +unsigned long __must_check __copy_from_user(void *dst, const void __user *src, + unsigned long len); +unsigned long copy_in_user(void __user *dst, const void __user *src, + unsigned long len); #define __copy_in_user copy_in_user #define __copy_to_user_inatomic __copy_to_user #define __copy_from_user_inatomic __copy_from_user @@ -217,23 +220,40 @@ static inline void copy_user_overflow(int size, unsigned long count) WARN(1, "Buffer overflow detected (%d < %lu)!\n", size, count); } -static inline unsigned long __must_check copy_from_user(void *to, - const void __user *from, - unsigned long n) +static __always_inline unsigned long __must_check +copy_from_user(void *to, const void __user *from, unsigned long n) { - int sz = __compiletime_object_size(to); - unsigned long ret = n; + int sz = __compiletime_object_size(to); + unsigned long ret = n; - if (likely(sz == -1 || sz >= n)) - ret = __copy_from_user(to, from, n); - else if (!__builtin_constant_p(n)) + if (likely(sz < 0 || sz >= n)) { + check_object_size(to, n, false); + ret = __copy_from_user(to, from, n); + } else if (!__builtin_constant_p(n)) copy_user_overflow(sz, n); else - __bad_copy_user(); + __bad_copy_user(); if (unlikely(ret)) memset(to + (n - ret), 0, ret); - return ret; + + return ret; +} + +static __always_inline unsigned long __must_check +copy_to_user(void __user *to, const void *from, unsigned long n) +{ + int sz = __compiletime_object_size(from); + + if (likely(sz < 0 || sz >= n)) { + check_object_size(from, n, true); + n = __copy_to_user(to, from, n); + } else if (!__builtin_constant_p(n)) + copy_user_overflow(sz, n); + else + __bad_copy_user(); + + return n; } struct pt_regs; -- cgit v1.2.3-59-g8ed1b