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 771DDC04A6B for ; Mon, 6 May 2019 16:32:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4495420C01 for ; Mon, 6 May 2019 16:32:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="CbTDaybx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727438AbfEFQcB (ORCPT ); Mon, 6 May 2019 12:32:01 -0400 Received: from mail-yw1-f73.google.com ([209.85.161.73]:53893 "EHLO mail-yw1-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727399AbfEFQb5 (ORCPT ); Mon, 6 May 2019 12:31:57 -0400 Received: by mail-yw1-f73.google.com with SMTP id v127so26083765ywb.20 for ; Mon, 06 May 2019 09:31:57 -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=40kxRsKyA2BTdfRG/8ycbW9cjWXHDWQTNAmN4QMp2Tc=; b=CbTDaybxwiO68FYaqEU987JbmTIWC/O/zmn5u4LAT2NjIg4zrx3ZZpTdEat2IZI7Zr UMjh3JrD6tSSJSHiA2J1SvwKqxkOFH9jD5t4pSSsFkT8XO0YzO5s2D93y2Fvv558QDT8 PC2RKfy08bb/yMf67M9jkhQd5jNijh0tU+IEPR6RStdwOkRtKLjro1177XiqKVVA8CKn 7nvBlr71nBnQ+GeGRfOaL9uXIjXsWpEFZPxFZ6iufv0v5siPwgW5vA64wYvStilJ/+ml T4dkOygYLm3ryZPhfxVQJsF9+4XGOGyyv3U3USZs8bMzVBnZRwvcMGmsqol00hqY8fWp TxbQ== 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=40kxRsKyA2BTdfRG/8ycbW9cjWXHDWQTNAmN4QMp2Tc=; b=fFalUz0rpN4F0aXOK3KXlnTa9MBKj6d/Rqx6oUAQOqnl3hRzYeIvYH1hJ/UPCEizM8 Ts9xvcOuGPWFOMWegIYo1OPpENbeutTwxUfc22AwvqEv2oAajKz6WfdplMHLXCQkfWJj dvrm+F/TWmNHCqctbzbb3PP0MqpD0uDVhu1SD6oU1/5pdARkuH5kJ3uEtFE7C4gTGs2n d6TxhNcSEWNMCFM3xwNyxXuUzgYNcugdI704alAXnvbIQAAxuyHy0+gje1YVXjvm3Uae gtdG80GNbg+9Fx9oJIr+VcAxfqzewf8GMsBJghe7HYeBrstol9Dg92iZ11c+/VU6gnV2 9NRw== X-Gm-Message-State: APjAAAXji8PxeSe5FtPS3vkMTahX1eecGdmBChLx2eifuULcj95c9WIM CDNABMll8Y4xeubAB98E17+0/n/wjcp5yiQd X-Google-Smtp-Source: APXvYqy7sMh67zqP2gW9MSWmQP0vNhHkuufaU8XQ9cxxJZb1a1Qrmr7t2Ui4wSymuQ40ovJdWXqcMvlrm4Ub8jqq X-Received: by 2002:a25:c5c8:: with SMTP id v191mr18795942ybe.52.1557160316771; Mon, 06 May 2019 09:31:56 -0700 (PDT) Date: Mon, 6 May 2019 18:31:02 +0200 In-Reply-To: Message-Id: <69a675a5c48fa2572162338c51a1bfa2a3ced27d.1557160186.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v15 16/17] vfio/type1, arm64: untag user pointers in vaddr_get_pfn 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-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. vaddr_get_pfn() uses provided user pointers for vma lookups, which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- drivers/vfio/vfio_iommu_type1.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index d0f731c9920a..5daa966d799e 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -382,6 +382,8 @@ static int vaddr_get_pfn(struct mm_struct *mm, unsigned long vaddr, down_read(&mm->mmap_sem); + vaddr = untagged_addr(vaddr); + vma = find_vma_intersection(mm, vaddr, vaddr + 1); if (vma && vma->vm_flags & VM_PFNMAP) { -- 2.21.0.1020.gf2820cf01a-goog