From patchwork Tue Apr 30 13:25:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10923601 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B3A60933 for ; Tue, 30 Apr 2019 13:27:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A399227EE2 for ; Tue, 30 Apr 2019 13:27:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 961B228A63; Tue, 30 Apr 2019 13:27:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4848527EE2 for ; Tue, 30 Apr 2019 13:27:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728296AbfD3NZj (ORCPT ); Tue, 30 Apr 2019 09:25:39 -0400 Received: from mail-ua1-f73.google.com ([209.85.222.73]:40803 "EHLO mail-ua1-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726648AbfD3NZh (ORCPT ); Tue, 30 Apr 2019 09:25:37 -0400 Received: by mail-ua1-f73.google.com with SMTP id y11so1913863uao.7 for ; Tue, 30 Apr 2019 06:25:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=CVV6psz/Vns5azsm7jZt0BKocrzPfr2CsD5f51mITmQ=; b=pHAUFUPIK00HUvs8fYzbfMDhOtYuRZOYj18jl6SUOemiz8hMuVoEwpyBcBFZsdPfRy CP69mD/DWkxSBrhRr7+Ao/OQBLtynTBk0B9gn31tW8yWHjU69Q7PB4ZDpgvtdnhUTEzK 8CbwpHg2uux/P91ru8mr0G2/NpJ+DVwloVARu7ft7n27vA6hkWJDGMY1mugB3YmYuyhT OwmXeDxT9woV4yHQlsAA+KWTEq0dG80iCwsoH+0J1dhKu1C33LiknxZR75he7h2J78XE ZKdvpYjQpomJrWqZzF9raVXk6z/lSdaqbAYdD0YzglrS0vRmztdJidedrkfiqCqRVd3N hnSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=CVV6psz/Vns5azsm7jZt0BKocrzPfr2CsD5f51mITmQ=; b=nOfPm683S6sSjeydq8NAOpJ/YqAffUew60UyJFmPuVkQ7TSzNXAzVQTVcwAb+80ZSO Z/Da1Y8Y6wiWmqpdtPOEc4uOfkFArbguEjYcJCzf85PcxCqlIoKmKKXjPpIPIOaWTQrh IiVCeRtsY/UILMQfr/9RYnxm14v2IMBiSw47Tixb0nNULMDs7fl5YVCg/JiVeN5Cq5XN w4s9K60mC360kV7tQ/WzL0XzWXMgPP1yaxHsvksbh/DTQzQ7ha5ZXZc9MOjGRvV4M7iB MQ1D9kwiLNOS32xwmS+WJjJNCMTdEX4Q4Q+1QSHwoNbTD0vc1cCeGh20cC62YIJyFCRY HcNQ== X-Gm-Message-State: APjAAAVigkXx+ZSG7l6ULYDk+n4nAp+YFsXoYB8QtjBFDWPe9DO3qoqS MNJXyL1QANnucRo8+SAccKZ48WoTmoD4je6s X-Google-Smtp-Source: APXvYqxbH0hW8IUGPJRsH+MKg4I9yJOI2DrUXBayHbDSUEVQsqLwVaAkxsd+/0KcP5RvItcIqz2adgVjyHXkB8kF X-Received: by 2002:a67:dd01:: with SMTP id y1mr18718014vsj.39.1556630736057; Tue, 30 Apr 2019 06:25:36 -0700 (PDT) Date: Tue, 30 Apr 2019 15:25:02 +0200 In-Reply-To: Message-Id: <80f7d6a2f68adb1c41ef5baf8973537380c681b0.1556630205.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.593.g511ec345e18-goog Subject: [PATCH v14 06/17] mm: untag user pointers in do_pages_move From: Andrey Konovalov To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Catalin Marinas , Vincenzo Frascino , Will Deacon , Mark Rutland , Andrew Morton , Greg Kroah-Hartman , Kees Cook , Yishai Hadas , Kuehling@google.com, Felix , Deucher@google.com, Alexander , Koenig@google.com, Christian , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , Leon Romanovsky , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Chintan Pandya , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. do_pages_move() is used in the implementation of the move_pages syscall. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- mm/migrate.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/migrate.c b/mm/migrate.c index 663a5449367a..c014a07135f0 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1617,6 +1617,7 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes, if (get_user(node, nodes + i)) goto out_flush; addr = (unsigned long)p; + addr = untagged_addr(addr); err = -ENODEV; if (node < 0 || node >= MAX_NUMNODES)