From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,T_DKIMWL_WL_MED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85940C04A6B for ; Mon, 6 May 2019 16:33:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 597CB205C9 for ; Mon, 6 May 2019 16:33:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="MxkQGAhZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727037AbfEFQb2 (ORCPT ); Mon, 6 May 2019 12:31:28 -0400 Received: from mail-vk1-f202.google.com ([209.85.221.202]:34211 "EHLO mail-vk1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727010AbfEFQb0 (ORCPT ); Mon, 6 May 2019 12:31:26 -0400 Received: by mail-vk1-f202.google.com with SMTP id y82so6164385vkd.1 for ; Mon, 06 May 2019 09:31:26 -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=ngD1QIqwofb3Y9K5MW1PYIryx3q7PiTEQfc6RhUnaA4=; b=MxkQGAhZKcdMVO3IoBudATPab8TcsjZXX55HRiAN6IeYJiwC1j+iSqld+LLo8qyTyU J83cHqvwCOHlnCBK8LZqFG9H1aqF9NgW/OCa1+Ffyx8ZPU7n9taYd+4siYtOtJGSGqfL 2bs1HGMZCs+84KfkjQ03uml4i8KyBdYF3wjbHGyt6HNd/mpMm+1Qp1No+KcUfeHVzCH2 4161opexQWrAtxUlTCrivmQSMNxZ99d5aHCBZ5OmsHW7nAo6evlOzv9F19PFlipvMxI4 C4R/T1FLs15dBoQSeJwhzGqmh+Swz0oYJVhSbKReuunpnwRMPL8ZC0ZS5QHAp3xWLkRd Hr1w== 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=ngD1QIqwofb3Y9K5MW1PYIryx3q7PiTEQfc6RhUnaA4=; b=OJ9uTOh9jUkqm9iS1hIS0K5/iJJQ9hJKfPhHkl2wMhxS+aCsZ6foHHJdBZloRLnDAt gbHBA1lGkkW7/iHnMbKoHMpzVrb4icnuiG29eU9Uo8Hh/4KhZDANh9i0vfblTv66Zb8k kEUnM/gpoXIfQLf32dopduaw/spCOAGqxfqvwwEl6WMDtkQ3ETNPmxmQ5o8OQbZvJSWm 9zgKx82Gm7r3RBqBNdwde2wgEnqW6ppEx2tdw8hH3FHqKZ0qXJGEdHGHiTul2UP9uv9N ViY4ocEBITORAFOGeAAyE2z2ejspzUuMfsYm06rqSaGj9PGT6rQ9mD3MP7lgkwSGJOIy ai4g== X-Gm-Message-State: APjAAAXJI+AchbRFhEPukmHCDzsbBg46UnTB5jHk/FnJIo5tPhmme5CZ p56htIbWXpS2mr3FYNMFqYlcMtVMnZjpdxyG X-Google-Smtp-Source: APXvYqwpCSWnm5qxXyuaWGAqRu95+6gB9zDmbHbxq+0Vb45FEs/ziN6+T3PbyTnxcvdIphfk21MnSe6Qp4R1y+WG X-Received: by 2002:a1f:b45:: with SMTP id 66mr13881567vkl.38.1557160285529; Mon, 06 May 2019 09:31:25 -0700 (PDT) Date: Mon, 6 May 2019 18:30:52 +0200 In-Reply-To: Message-Id: <474b3c113edae1f2fa679dc7237ec070ff4efb70.1557160186.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v15 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 , Felix Kuehling , Alexander Deucher , Christian Koenig , 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 , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org 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) -- 2.21.0.1020.gf2820cf01a-goog