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,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 DD8B8C28CC6 for ; Mon, 3 Jun 2019 16:56:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B7610274E4 for ; Mon, 3 Jun 2019 16:56:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="TJVcn1cL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729690AbfFCQ4H (ORCPT ); Mon, 3 Jun 2019 12:56:07 -0400 Received: from mail-qk1-f202.google.com ([209.85.222.202]:33696 "EHLO mail-qk1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729667AbfFCQ4E (ORCPT ); Mon, 3 Jun 2019 12:56:04 -0400 Received: by mail-qk1-f202.google.com with SMTP id t196so1013193qke.0 for ; Mon, 03 Jun 2019 09:56:03 -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=EspxEupGJGiWEDXD9P4jjgWKmcXH74NzvYIbJ/AWgMI=; b=TJVcn1cLKwrCDqfOoDXp30a4H6TaXBKiwiHjDAdwongHK/bKzo02AftS+NOLHZV2qk uaXFTsh7OP9kK6tBgKChXJ2KBusgSI13ByE5QAJT4opcCyHzVAEN7KnoiqvVvgIk9UeZ thbX5DYw+Ya/O9Bt8a5AL4KNqAUsZ4B4hEfnsQKdt+gJFBe02e/Gllpw40I3Eh8jjzXh yX2E6mPgl8q0tFyhEApdfs/i0GKdcLnrmq2mOZHSQm727N+W9pKIuuH8ohRLmjbmQDTf QCPeVpMCsS5AlW/faffrLj+KIOBAFryuyM2XhBVLl0qrMu2w3WMArdINiV+/WP+bh/um j3qg== 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=EspxEupGJGiWEDXD9P4jjgWKmcXH74NzvYIbJ/AWgMI=; b=eP+XgU/6jxvdagBD51zsKlTpHfYn/JkF/8+bBy5OpfYRk9bK/1b0gPKGeh5h1K0eyp QCDkrj5xeFmfGxAAiQfP3nB5dfNux1Wcd40BxLRbuiDHapvScrEwMwvn6NW07GqDfRO6 5hTa64jLbCSqGz6sLXrxtjfe6u7HJ8QvtrkjVlnrttCQeE4QI1JyLBVasqqdJWjRX2da N1Y7uBQe9hnAK/jWs9RDkIoobTuLugyKcjdjdSf073qvAp1uV/MZRJM11uk0CWThwSvy 6HQ9UR/tSn5ZyOiGJzxVJHYLIEfBafsbEpAcjOkJITgrsEQwkqYznSHEz2sho0j0N+/y ZQNw== X-Gm-Message-State: APjAAAXJfsbLLDamRoc7oj1Rw7It1B1Hg8CdKvCf2YA3oex1WjKoTQc0 HXyRilRmuLTT7WTzznBGG//uF+uzh3bdG8VJ X-Google-Smtp-Source: APXvYqyTJQX58jIU+0IdRLMyhel9C9SXAf29MqpC57OIYMzhYLqjfoH2DhcsbA5oBHVd1rJqiIiEUBwjKZJxchdB X-Received: by 2002:a0c:be87:: with SMTP id n7mr3853859qvi.65.1559580963191; Mon, 03 Jun 2019 09:56:03 -0700 (PDT) Date: Mon, 3 Jun 2019 18:55:14 +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 12/16] IB, arm64: untag user pointers in ib_uverbs_(re)reg_mr() 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-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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. ib_uverbs_(re)reg_mr() use provided user pointers for vma lookups (through e.g. mlx4_get_umem_mr()), which can only by done with untagged pointers. Untag user pointers in these functions. Signed-off-by: Andrey Konovalov --- drivers/infiniband/core/uverbs_cmd.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 5a3a1780ceea..f88ee733e617 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -709,6 +709,8 @@ static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) if (ret) return ret; + cmd.start = untagged_addr(cmd.start); + if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) return -EINVAL; @@ -791,6 +793,8 @@ static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) if (ret) return ret; + cmd.start = untagged_addr(cmd.start); + if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) return -EINVAL; -- 2.22.0.rc1.311.g5d7573a151-goog