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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,T_DKIMWL_WL_HIGH, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by aws-us-west-2-korg-lkml-1.web.codeaurora.org (Postfix) with ESMTP id 05683C433EF for ; Tue, 12 Jun 2018 16:54:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B0729208B9 for ; Tue, 12 Jun 2018 16:54:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="pj5OuT43" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B0729208B9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935254AbeFLQyA (ORCPT ); Tue, 12 Jun 2018 12:54:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:54422 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935234AbeFLQx4 (ORCPT ); Tue, 12 Jun 2018 12:53:56 -0400 Received: from localhost (LFbn-1-12247-202.w90-92.abo.wanadoo.fr [90.92.61.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E38EB208B7; Tue, 12 Jun 2018 16:53:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1528822436; bh=uHhsRzaeWWb8FiBsdJVn/VirD9weXpIi035Op4H7nHo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pj5OuT438uIqP8ECQ4BvUvYHUMgtWdnrQCNHeqAbc9MNhMnAcU3FKeB0tRqBP0bwL /8i1ZpAMvJ/jonORm2re9M7lL2NZFOTJRuwPmKT3eiDH4m6bstJuHYXe04PpTvZfo/ GpGqWQxXtx25iTSX3WQB8VuEUPoNbXRqVVY2R7Jk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dave Airlie Subject: [PATCH 3.18 11/21] drm: set FMODE_UNSIGNED_OFFSET for drm files Date: Tue, 12 Jun 2018 18:52:08 +0200 Message-Id: <20180612164825.870196921@linuxfoundation.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180612164825.401145490@linuxfoundation.org> References: <20180612164825.401145490@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 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 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dave Airlie commit 76ef6b28ea4f81c3d511866a9b31392caa833126 upstream. Since we have the ttm and gem vma managers using a subset of the file address space for objects, and these start at 0x100000000 they will overflow the new mmap checks. I've checked all the mmap routines I could see for any bad behaviour but overall most people use GEM/TTM VMA managers even the legacy drivers have a hashtable. Reported-and-Tested-by: Arthur Marsh (amarsh04 on #radeon) Fixes: be83bbf8068 (mmap: introduce sane default mmap limits) Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/drm_fops.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -155,6 +155,7 @@ static int drm_open_helper(struct file * return -ENOMEM; filp->private_data = priv; + filp->f_mode |= FMODE_UNSIGNED_OFFSET; priv->filp = filp; priv->uid = current_euid(); priv->pid = get_pid(task_pid(current));