x86: switch cp_stat64() to unsafe_put_user()

	typeof(ubuf->st_gid) gid = 0;

	SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid));

	SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid));

	if (!access_ok(ubuf, sizeof(struct stat64)) ||

	    __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||

	    __put_user(stat->ino, &ubuf->__st_ino) ||

	    __put_user(stat->ino, &ubuf->st_ino) ||

	    __put_user(stat->mode, &ubuf->st_mode) ||

	    __put_user(stat->nlink, &ubuf->st_nlink) ||

	    __put_user(uid, &ubuf->st_uid) ||

	    __put_user(gid, &ubuf->st_gid) ||

	    __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||

	    __put_user(stat->size, &ubuf->st_size) ||

	    __put_user(stat->atime.tv_sec, &ubuf->st_atime) ||

	    __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||

	    __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||

	    __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||

	    __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||

	    __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||

	    __put_user(stat->blksize, &ubuf->st_blksize) ||

	    __put_user(stat->blocks, &ubuf->st_blocks))

	if (!user_write_access_begin(ubuf, sizeof(struct stat64)))

		return -EFAULT;

	unsafe_put_user(huge_encode_dev(stat->dev), &ubuf->st_dev, Efault);

	unsafe_put_user(stat->ino, &ubuf->__st_ino, Efault);

	unsafe_put_user(stat->ino, &ubuf->st_ino, Efault);

	unsafe_put_user(stat->mode, &ubuf->st_mode, Efault);

	unsafe_put_user(stat->nlink, &ubuf->st_nlink, Efault);

	unsafe_put_user(uid, &ubuf->st_uid, Efault);

	unsafe_put_user(gid, &ubuf->st_gid, Efault);

	unsafe_put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev, Efault);

	unsafe_put_user(stat->size, &ubuf->st_size, Efault);

	unsafe_put_user(stat->atime.tv_sec, &ubuf->st_atime, Efault);

	unsafe_put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec, Efault);

	unsafe_put_user(stat->mtime.tv_sec, &ubuf->st_mtime, Efault);

	unsafe_put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec, Efault);

	unsafe_put_user(stat->ctime.tv_sec, &ubuf->st_ctime, Efault);

	unsafe_put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec, Efault);

	unsafe_put_user(stat->blksize, &ubuf->st_blksize, Efault);

	unsafe_put_user(stat->blocks, &ubuf->st_blocks, Efault);

	user_access_end();

	return 0;

Efault:

	user_write_access_end();

	return -EFAULT;

}

COMPAT_SYSCALL_DEFINE2(ia32_stat64, const char __user *, filename,