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=-16.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_MED,URIBL_BLOCKED, 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 71388C04AB5 for ; Mon, 3 Jun 2019 16:57:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4A4AE206BA for ; Mon, 3 Jun 2019 16:57:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ew82e7Nz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729525AbfFCQzi (ORCPT ); Mon, 3 Jun 2019 12:55:38 -0400 Received: from mail-qt1-f201.google.com ([209.85.160.201]:42742 "EHLO mail-qt1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729519AbfFCQzh (ORCPT ); Mon, 3 Jun 2019 12:55:37 -0400 Received: by mail-qt1-f201.google.com with SMTP id t11so8120054qtc.9 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=tUrF40jx0wx5kUGyHrqHDHkTOrK51pc/PEHR8Lle3jwntwZrm4l4KIAtN80KSIzvbI YRnBf7EV+EPgNjr6t7sB/IJkIDtrRM9WwQlwUAYf4uBOBwDWZI3QQX/FbYAp2MBcL4c+ G92liUIQ0bpyvWZ890ffl2dYcJ2iR4a6Oog8XXFYTv6X675cXxgk9IGIcFfFwhGsPlWw s3oQjtvXBnEALOu3BYX7EQouTS3cL2zd8k94ii1WftekNnT5CnMe3Cui4YVVjgpNG1OY 22PJvcVW8Df316uFToLvynHgxn7tjptqBZbiOMjmwPTppk76IdDVxi0qUgoprM8WGhwk Dilg== X-Gm-Message-State: APjAAAUQNRpanZ+vMjZdKxR8Hw6UZLcQHVeHvuAkjAcZpaP+I2CgUj3C wiVUNXZfsOBXr5Yq+steL7s3kA+vywO1sysX 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 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. Reviewed-by: Catalin Marinas 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 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) -- 2.22.0.rc1.311.g5d7573a151-goog