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=-5.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 C51E8C48BE1 for ; Thu, 20 Jun 2019 18:07:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9B8162070B for ; Thu, 20 Jun 2019 18:07:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561054039; bh=rTRSA2ixgXrIK32n3nUn99ovwkIyyyPn4BpR/+aI+fI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=uU6APWFvTyhYtfHviAaKmS4C56GSUQWoqGz/xtc0Sefux6zfjPcXA5IWBPQr0DXLv 1aRnVJ7CpA8G9RMOmnEfMNuTAzZOzPIsWeHFdl84+bc4zZW1STljjc6CUW5IcHqX7M 8ZgR4kKMGO9pptzxU3qGuuajYjdTaPzHKeajV8kk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726942AbfFTSHO (ORCPT ); Thu, 20 Jun 2019 14:07:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:33580 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728290AbfFTSHM (ORCPT ); Thu, 20 Jun 2019 14:07:12 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 B060E2089C; Thu, 20 Jun 2019 18:07:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561054032; bh=rTRSA2ixgXrIK32n3nUn99ovwkIyyyPn4BpR/+aI+fI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oQZIR4zU9I16yzxeWRQjhGxrGqDWsljo7Fmk3/yfpIZ95wOewcE6uSdp+Z9RjTp1V 5CVBQo1T2+JIpCIYohStgeA93vPvWvk30t9Xg6RtjkAEP7nQ4SRb1QaBEzvX8hIZ6P hwLMT1MlDnfNiLk5k3jgEP06qrsXCzvDg46eU3d4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Murray McAllister , Thomas Hellstrom Subject: [PATCH 4.9 082/117] drm/vmwgfx: NULL pointer dereference from vmw_cmd_dx_view_define() Date: Thu, 20 Jun 2019 19:56:56 +0200 Message-Id: <20190620174357.216317178@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190620174351.964339809@linuxfoundation.org> References: <20190620174351.964339809@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Murray McAllister commit bcd6aa7b6cbfd6f985f606c6f76046d782905820 upstream. If SVGA_3D_CMD_DX_DEFINE_RENDERTARGET_VIEW is called with a surface ID of SVGA3D_INVALID_ID, the srf struct will remain NULL after vmw_cmd_res_check(), leading to a null pointer dereference in vmw_view_add(). Cc: Fixes: d80efd5cb3de ("drm/vmwgfx: Initial DX support") Signed-off-by: Murray McAllister Reviewed-by: Thomas Hellstrom Signed-off-by: Thomas Hellstrom Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c @@ -2733,6 +2733,10 @@ static int vmw_cmd_dx_view_define(struct if (view_type == vmw_view_max) return -EINVAL; cmd = container_of(header, typeof(*cmd), header); + if (unlikely(cmd->sid == SVGA3D_INVALID_ID)) { + DRM_ERROR("Invalid surface id.\n"); + return -EINVAL; + } ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, user_surface_converter, &cmd->sid, &srf_node);