From patchwork Mon Jun 3 16:55:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10973275 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 01C4414E5 for ; Mon, 3 Jun 2019 16:55:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E2A6727CEA for ; Mon, 3 Jun 2019 16:55:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D634A285ED; Mon, 3 Jun 2019 16:55:42 +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 850F427CEA for ; Mon, 3 Jun 2019 16:55:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729521AbfFCQzi (ORCPT ); Mon, 3 Jun 2019 12:55:38 -0400 Received: from mail-qk1-f201.google.com ([209.85.222.201]:47524 "EHLO mail-qk1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729491AbfFCQzh (ORCPT ); Mon, 3 Jun 2019 12:55:37 -0400 Received: by mail-qk1-f201.google.com with SMTP id l185so978861qkd.14 for ; Mon, 03 Jun 2019 09:55:36 -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=luHVeQDtsejNe05MbpEHIJ5FAOspLsm1rW4+f3IOXdc=; b=ew82e7NzIq+8fpVjdyGeAl2NjSKK4p0nGZ5QsTZKvqtsLjuuAXvE063KXb+pD0cHy3 33+cPut/htgPr27GTzwOcJ20GBX2Ux9NssttTzwHChq9HvO45Yd1WsNH+qMaKhyQDDTc D+9zMoo5SrYePAGdOkXZXmMQhF2t0ypsOVpok1EOYB7sNktF/Rh9uldB40uKjOJapI1g axLdF69gRV4YSFbj/UQdIsHxS2aGe/kJaiIGVBIH5qRmQS2qsSWYGny0rQfE2+NQmVfF bjXTeOgusRer2Jz6pFuYk/PEgndLJQ02z9T1gNTKOM3uuFHRlwHl2aCc1w3EkCHnhf6g ZiTA== 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=luHVeQDtsejNe05MbpEHIJ5FAOspLsm1rW4+f3IOXdc=; b=KJnRGorRP332q5kU6BZrgja/PNSe6gKErI3mEYSsOZgddaIigIU1EOPB3oOxVRGvG7 Z/TEsPjSiytJ+zApfM3H1pdFsp1YjqKtbpHrVetQo1GsFesViJH/VS/R/o4+cTEbdjKT fI1/9Mye5rSL/vi+s0eqMGW9YM4Hz0EiSpWjOAFK7l/vlolgIJvwfcdo06+lrj92p2lI J0JaXRHxuPuayYqL33jQPu61WOz7muinHFk935LdBmor2+Ih6yoZUE/G9mfaPY70Btdz wuPqVbFGBCfp87eBo3VGqqmZ6K8DtKBbkrz0Du9s8DDg7kID1RXjIl5HMCimrG17H1j0 Bs0Q== X-Gm-Message-State: APjAAAUYDbG9WcmEp6+AS/pJ97BY/lrYv3xkNHopS8A61hKNA3svhJfO 5KB8AOiSYd3DKRQdxZn+UZA6kJsHtO1Qep14 X-Google-Smtp-Source: APXvYqxWajnT2+NV3xTud3R56ZNhfS6I5UrUDe55n3y1jJe3OWUToUGKN+BmVqJ0YCPX/M4xXQWJhyPq+bf/72n5 X-Received: by 2002:a0c:ad23:: with SMTP id u32mr3896810qvc.39.1559580936412; Mon, 03 Jun 2019 09:55:36 -0700 (PDT) Date: Mon, 3 Jun 2019 18:55:06 +0200 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.rc1.311.g5d7573a151-goog Subject: [PATCH v16 04/16] 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 , Luc Van Oostenryck , Dave Martin , Khalid Aziz , enh , Jason Gunthorpe , Christoph Hellwig , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , 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. Reviewed-by: Catalin Marinas Signed-off-by: Andrey Konovalov Reviewed-by: Kees Cook --- mm/migrate.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/migrate.c b/mm/migrate.c index f2ecc2855a12..3930bb6fa656 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)