Merge tag 'v4.4.63' into linux-linaro-lsk-v4.4

[firefly-linux-kernel-4.4.55.git] / arch / sparc / include / asm / uaccess_32.h

diff --git a/arch/sparc/include/asm/uaccess_32.h b/arch/sparc/include/asm/uaccess_32.h
index 64ee103dc29da142305d93d26fd44cf4a62ae699..e7d6bb4cd619b362aa8fd84c71ecc3d7a18b9eb3 100644 (file)
--- a/arch/sparc/include/asm/uaccess_32.h
+++ b/arch/sparc/include/asm/uaccess_32.h
@@ -313,23 +313,28 @@ unsigned long __copy_user(void __user *to, const void __user *from, unsigned lon
 
 static inline unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
 {
-       if (n && __access_ok((unsigned long) to, n))
+       if (n && __access_ok((unsigned long) to, n)) {
+               check_object_size(from, n, true);
                return __copy_user(to, (__force void __user *) from, n);
-       else
+       } else
                return n;
 }
 
 static inline unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n)
 {
+       check_object_size(from, n, true);
        return __copy_user(to, (__force void __user *) from, n);
 }
 
 static inline unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
 {
-       if (n && __access_ok((unsigned long) from, n))
+       if (n && __access_ok((unsigned long) from, n)) {
+               check_object_size(to, n, false);
                return __copy_user((__force void __user *) to, from, n);
-       else
+       else {
+               memset(to, 0, n);
                return n;
+       }
 }
 
 static inline unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)