From patchwork Mon May 6 16:30:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10931535 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 6639514DB for ; Mon, 6 May 2019 16:33:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 55B7D287EF for ; Mon, 6 May 2019 16:33:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 49C3E286AA; Mon, 6 May 2019 16:33:14 +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 F0BD6287EF for ; Mon, 6 May 2019 16:33:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727048AbfEFQb2 (ORCPT ); Mon, 6 May 2019 12:31:28 -0400 Received: from mail-vs1-f73.google.com ([209.85.217.73]:45385 "EHLO mail-vs1-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727020AbfEFQb0 (ORCPT ); Mon, 6 May 2019 12:31:26 -0400 Received: by mail-vs1-f73.google.com with SMTP id v7so2701063vsc.12 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=M2mrTVtCOmGcdy+l9j7iOMl1rz0SyJRlJNAoC/i4bmbrulZoT0E2UG5jGxOE8lt5ms MWLi9I2rohFNgF4Gten0aYjmATAsoiV91fVPiEQkNBe6KSgUccVPUA2w+5IunaPs8sIe 2Lpiif8d4v2YACDUHhj36708g4V9ITR6Ckh+7jZeUFqdF2xm8pEXPIJOu+0dixXK9Ltx fzyufdHltlf/ygEeW4QcdTzQXom/aJhXwYJYZC5nSWXHZUQO2jyws3m3AzUQORfmVcVR iWwLa3BlZJU8H7wGYROm7e2C7l6LPyHcYpxelQljokbTQ6cvT9zhd1aLFb+3Q0xT0jui VPcQ== X-Gm-Message-State: APjAAAX0niGW4qM5+b9GeL8a7xRF3tVweIh1GF8mCGrvYERu5kVTe7mJ T+zRpLBNoZr5ddNcXtDNbzb6gRAmp5IsVFeN 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 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 Reviewed-by: Catalin Marinas --- 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)