From patchwork Thu Apr 2 08:32:19 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Praveen Paneri X-Patchwork-Id: 6145131 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 6BEF3BF4A6 for ; Thu, 2 Apr 2015 08:28:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8297C202C8 for ; Thu, 2 Apr 2015 08:28:33 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id C17792034C for ; Thu, 2 Apr 2015 08:28:32 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 606F46E995; Thu, 2 Apr 2015 01:28:32 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTP id 37EF06E995 for ; Thu, 2 Apr 2015 01:28:31 -0700 (PDT) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP; 02 Apr 2015 01:28:32 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,509,1422950400"; d="scan'208";a="689364115" Received: from intel-desktop.iind.intel.com ([10.223.82.37]) by fmsmga001.fm.intel.com with ESMTP; 02 Apr 2015 01:28:30 -0700 From: Praveen Paneri To: intel-gfx@lists.freedesktop.org Date: Thu, 2 Apr 2015 14:02:19 +0530 Message-Id: <1427963547-23614-5-git-send-email-praveen.paneri@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1427963547-23614-1-git-send-email-praveen.paneri@intel.com> References: <1427963547-23614-1-git-send-email-praveen.paneri@intel.com> Cc: Praveen Paneri Subject: [Intel-gfx] [PATCH 04/12] intel: Validate pointer before using X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Move the dereferencing below the check for valid ctx pointer. Signed-off-by: Praveen Paneri --- intel/intel_decode.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/intel/intel_decode.c b/intel/intel_decode.c index b70d949..5dab9ca 100644 --- a/intel/intel_decode.c +++ b/intel/intel_decode.c @@ -3901,12 +3901,14 @@ drm_intel_decode(struct drm_intel_decode *ctx) int ret; unsigned int index = 0; uint32_t devid; - int size = ctx->base_count * 4; + int size; void *temp; if (!ctx) return; + size = ctx->base_count * 4; + /* Put a scratch page full of obviously undefined data after * the batchbuffer. This lets us avoid a bunch of length * checking in statically sized packets.