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=-17.4 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_HELO_NONE,SPF_PASS,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 D3393C76186 for ; Tue, 23 Jul 2019 18:00:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A6276218A0 for ; Tue, 23 Jul 2019 18:00:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="a1Wmmrmp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391385AbfGWR7o (ORCPT ); Tue, 23 Jul 2019 13:59:44 -0400 Received: from mail-yw1-f73.google.com ([209.85.161.73]:44723 "EHLO mail-yw1-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391359AbfGWR7j (ORCPT ); Tue, 23 Jul 2019 13:59:39 -0400 Received: by mail-yw1-f73.google.com with SMTP id l141so32580288ywc.11 for ; Tue, 23 Jul 2019 10:59:39 -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=JHpRt1iV1Yui2063ArtK5NZw3fPfTbQsXHZ/X8tSe2c=; b=a1WmmrmprQZ/rcrg4bnGXYSWuW8VRJo8q/rb7ZTLQKZa1K7I67ixfos045Wbs17Hsc 4ubobzNkIuAipJMS7ZPZPbwqhOEcQBYGSdXPH8NmRc6nBI3x8EfWx1KUwQ8GdoHMrOVu pQBBRoSlOoWQvrJK6Ndgh0M+u5SrtS+Z7XLFtzHXYzmOZcoQreZcqxEy8gyvJGE0ittV 1ErCh2wjdbyE4mfBH/bts1VkhHwv8KlRuO+94TszgBwo8vjAMA7AFwRnm9ELenbWUlad Ar6m6acLtYRugfggNK1CttVM0dqBedFHVAahPgUmqPuarVGgg9aYEhjvXatkNn9RUbXS DjvQ== 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=JHpRt1iV1Yui2063ArtK5NZw3fPfTbQsXHZ/X8tSe2c=; b=Y4xnGPLA5COhX9ld+W5soh/EJJOq9D2Si7k4Zt+UUAekv+8f77mtYeeOyISGJk2Ham 8OzGkjXYtWtKE7TnweudumEJtSCWbyNuC1STYSJGyT2ws0omOpmmfEPfSS8g26wf6RIL uZCP8YTVtHFo5zejSyyaZMbOaymXvn2bgmNqtdwRgWzwMgymkw5rJsH3tDJdE3CTi+o8 P+CrTgXJsq8Xo5nU7O2zdYJPBc8bGjeB5cMh5qVbM1keBAbvmnBKU8JPe4CK5KNhbWUq 1hCHxASe8ESQmojoNPwLYKEMqbtO1CCks1h7OMTmRsoCbWO/mg7fXGBHh5ZPdlkw+YIA E69w== X-Gm-Message-State: APjAAAWz/4kNsi4dTqR1f5R3PcZNgldg4r3KmIevMw+GqJA9LrOFvVdr 3efzoe3i8P6MhInA4JlgKoYN4wZfaqENMNl5 X-Google-Smtp-Source: APXvYqzQ4z/ZiuFK+6sqRZERC5QgYRRFA4U1Dnbp9V3f1PKQeQRLZSu3TG/nr3g90hvkMvcrT8eNvmOVLDqS9X26 X-Received: by 2002:a0d:d616:: with SMTP id y22mr43437325ywd.365.1563904778592; Tue, 23 Jul 2019 10:59:38 -0700 (PDT) Date: Tue, 23 Jul 2019 19:58:47 +0200 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.709.g102302147b-goog Subject: [PATCH v19 10/15] drm/radeon: untag user pointers in radeon_gem_userptr_ioctl 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-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org This patch is a part of a series that extends kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. In radeon_gem_userptr_ioctl() an MMU notifier is set up with a (tagged) userspace pointer. The untagged address should be used so that MMU notifiers for the untagged address get correctly matched up with the right BO. This funcation also calls radeon_ttm_tt_pin_userptr(), which uses provided user pointers for vma lookups, which can only by done with untagged pointers. This patch untags user pointers in radeon_gem_userptr_ioctl(). Reviewed-by: Khalid Aziz Reviewed-by: Kees Cook Suggested-by: Felix Kuehling Acked-by: Felix Kuehling Signed-off-by: Andrey Konovalov --- drivers/gpu/drm/radeon/radeon_gem.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c index d8bc5d2dfd61..89353098b627 100644 --- a/drivers/gpu/drm/radeon/radeon_gem.c +++ b/drivers/gpu/drm/radeon/radeon_gem.c @@ -296,6 +296,8 @@ int radeon_gem_userptr_ioctl(struct drm_device *dev, void *data, uint32_t handle; int r; + args->addr = untagged_addr(args->addr); + if (offset_in_page(args->addr | args->size)) return -EINVAL; -- 2.22.0.709.g102302147b-goog