ARM: 8051/1: put_user: fix possible data corruption in put_user

[pandora-kernel.git] / arch / arm / include / asm / uaccess.h

diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h
index 292c3f8..18a2858 100644 (file)
--- a/arch/arm/include/asm/uaccess.h
+++ b/arch/arm/include/asm/uaccess.h
@@ -158,8 +158,9 @@ extern int __put_user_8(void *, unsigned long long);
 #define put_user(x,p)                                                  \
        ({                                                              \
                unsigned long __limit = current_thread_info()->addr_limit - 1; \
+               const typeof(*(p)) __user *__tmp_p = (p);               \
                register const typeof(*(p)) __r2 asm("r2") = (x);       \
-               register const typeof(*(p)) __user *__p asm("r0") = (p);\
+               register const typeof(*(p)) __user *__p asm("r0") = __tmp_p; \
                register unsigned long __l asm("r1") = __limit;         \
                register int __e asm("r0");                             \
                switch (sizeof(*(__p))) {                               \