Merge tag 'usercopy-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

[thirdparty/linux.git] / arch / arm64 / include / asm / uaccess.h

diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h
index 5e834d10b2913d91bf3620c0e5930cdb5e14035e..c47257c91b77e3d6516000c0c8bec5705b97b6dc 100644 (file)
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h
@@ -265,22 +265,25 @@ extern unsigned long __must_check __clear_user(void __user *addr, unsigned long
 static inline unsigned long __must_check __copy_from_user(void *to, const void __user *from, unsigned long n)
 {
        kasan_check_write(to, n);
-       return  __arch_copy_from_user(to, from, n);
+       check_object_size(to, n, false);
+       return __arch_copy_from_user(to, from, n);
 }
 
 static inline unsigned long __must_check __copy_to_user(void __user *to, const void *from, unsigned long n)
 {
        kasan_check_read(from, n);
-       return  __arch_copy_to_user(to, from, n);
+       check_object_size(from, n, true);
+       return __arch_copy_to_user(to, from, n);
 }
 
 static inline unsigned long __must_check copy_from_user(void *to, const void __user *from, unsigned long n)
 {
        kasan_check_write(to, n);
 
-       if (access_ok(VERIFY_READ, from, n))
+       if (access_ok(VERIFY_READ, from, n)) {
+               check_object_size(to, n, false);
                n = __arch_copy_from_user(to, from, n);
-       else /* security hole - plug it */
+       } else /* security hole - plug it */
                memset(to, 0, n);
        return n;
 }
@@ -289,8 +292,10 @@ static inline unsigned long __must_check copy_to_user(void __user *to, const voi
 {
        kasan_check_read(from, n);
 
-       if (access_ok(VERIFY_WRITE, to, n))
+       if (access_ok(VERIFY_WRITE, to, n)) {
+               check_object_size(from, n, true);
                n = __arch_copy_to_user(to, from, n);
+       }
        return n;
 }