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=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,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 D3CCEC04AA8 for ; Tue, 30 Apr 2019 13:26:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A0A78217D7 for ; Tue, 30 Apr 2019 13:26:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="WJvgA7Fh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728760AbfD3N0K (ORCPT ); Tue, 30 Apr 2019 09:26:10 -0400 Received: from mail-pl1-f202.google.com ([209.85.214.202]:57316 "EHLO mail-pl1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728737AbfD3N0I (ORCPT ); Tue, 30 Apr 2019 09:26:08 -0400 Received: by mail-pl1-f202.google.com with SMTP id g11so5328568plt.23 for ; Tue, 30 Apr 2019 06:26:08 -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=Qo5FEqXeJKdpmXvqV1aNmsvS1qf4QOcuAEvGRZnbU+I=; b=WJvgA7FhPH4nnlwUD7/cK+UGsQvztnpEwl/EwgwpETKSn2jcm2n8vXAJ5vmz+updJQ hv5vQG7S1TSnGIvsNFWmNlDJOuMgBbHPDTDqE1/Q7BSkSWZGsQSxWFmbI9EyZ11RD35O PoWicUER0x2L/roTgi03inDjhawM/RefWqQ0HU9dp3Bfb6piRBIYbrmvMjy86XgTN3si Ctsvudz1bGthwFBvr6qlHQElPSiMTUZTlDJzHWjXIK5Av3TkDr+6XQPdcLfX/oczYas3 y01MzwmNMMd59RGZLYJMIFoZY0gr9B1FAyRfwBPJvm7Zd8dDqsp5xcnwSnBCo7S+GHIh eAtA== 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=Qo5FEqXeJKdpmXvqV1aNmsvS1qf4QOcuAEvGRZnbU+I=; b=W5dkQtlx9WPdwPsJ1F/M/3CreVobmC3mAW4K0v0ANA0SBn3gqp0ss7gipbnG609pTH A4fmRw4A/e4aMR5NbaJrVL7O5IADLJsnj0Sa7PJiW6CUK1vy2SksC9lOp7TzBmRy0kwf wpig+C+BYCZbBJIgNLc9PbZTxCh4PPPP0j/spfPvoX9zfFGObQpfZ2Yvwzh5ojDAOghi pxWM28+yTmL8S2mVZvi8CSOEYwF2zMOsUlSjhFrK0a6y0yG3/NPLox6P6bgng3lxDJYn MNHljlYEhaPymBIId1pMBQNtYrKkHvXXjXOQ6h9aTo9w/cfFCdvKsUUNiJ/Fgc09ex1Z urtw== X-Gm-Message-State: APjAAAUL7WPk/jkfXvCQsfDyAP719fMLBq/Nf2ue2rl2F1FNaBmzALjM O6RchWcwdH7eM84JPQr4SCB/c+L0C6c52seS X-Google-Smtp-Source: APXvYqzC1lVWU3xOxPIpeGY1IySKfn9D9N99TINTSZcSwcwIPCbrd75tIMQec4oX3DSqqzuBnQc6miaAqMAhwGUH X-Received: by 2002:a63:1d4f:: with SMTP id d15mr64183239pgm.347.1556630767405; Tue, 30 Apr 2019 06:26:07 -0700 (PDT) Date: Tue, 30 Apr 2019 15:25:12 +0200 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.593.g511ec345e18-goog Subject: [PATCH v14 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 , Kuehling@google.com, Felix , Deucher@google.com, Alexander , Koenig@google.com, Christian , 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 , Chintan Pandya , 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) { -- 2.21.0.593.g511ec345e18-goog