x86/uaccess: Don't leak the AC flag into __put_user() value evaluation

[linux.git] / arch / x86 / include / asm / uaccess.h

diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index a77445d1b0348675b5b750ad6acd617321b49b1b..28376aa2d05374ecec9c2659c272db373e118a16 100644 (file)
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -284,7 +284,7 @@ do {                                                                        \
                __put_user_goto(x, ptr, "l", "k", "ir", label);         \
                break;                                                  \
        case 8:                                                         \
-               __put_user_goto_u64((__typeof__(*ptr))(x), ptr, label); \
+               __put_user_goto_u64(x, ptr, label);                     \
                break;                                                  \
        default:                                                        \
                __put_user_bad();                                       \
@@ -431,8 +431,10 @@ do {                                                                       \
 ({                                                             \
        __label__ __pu_label;                                   \
        int __pu_err = -EFAULT;                                 \
+       __typeof__(*(ptr)) __pu_val;                            \
+       __pu_val = x;                                           \
        __uaccess_begin();                                      \
-       __put_user_size((x), (ptr), (size), __pu_label);        \
+       __put_user_size(__pu_val, (ptr), (size), __pu_label);   \
        __pu_err = 0;                                           \
 __pu_label:                                                    \
        __uaccess_end();                                        \