From patchwork Mon Aug 24 03:45:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nischal Varide X-Patchwork-Id: 11732827 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5E2C7913 for ; Mon, 24 Aug 2020 10:42:05 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 46BA52074D for ; Mon, 24 Aug 2020 10:42:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 46BA52074D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BEE316E1D7; Mon, 24 Aug 2020 10:42:04 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 262FC6E1CF for ; Mon, 24 Aug 2020 10:41:57 +0000 (UTC) IronPort-SDR: 4u4cqHx+DPUtcDOV9jF81QTQpu711TBkUUvI6cNdWOD/jEpCSRKClVMjk5YQInjiRnovBM9klg FjyKfIo1BI3Q== X-IronPort-AV: E=McAfee;i="6000,8403,9722"; a="153285906" X-IronPort-AV: E=Sophos;i="5.76,348,1592895600"; d="scan'208";a="153285906" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Aug 2020 03:41:56 -0700 IronPort-SDR: 9q3POlV+9xgOJ4O9ZPCatKcaytEE3vJlIf+RpIklQmuhXYZ2Yi3ea7dfahqd620hIeg9a2bpaU RTql7V7710Eg== X-IronPort-AV: E=Sophos;i="5.76,348,1592895600"; d="scan'208";a="473869531" Received: from unknown (HELO john.iind.intel.com) ([10.223.74.105]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-SHA; 24 Aug 2020 03:41:55 -0700 From: Nischal Varide To: intel-gfx@lists.freedesktop.org, nischal.varide@intel.com Date: Mon, 24 Aug 2020 09:15:54 +0530 Message-Id: <20200824034556.26626-3-nischal.varide@intel.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200824034556.26626-1-nischal.varide@intel.com> References: <20200824034556.26626-1-nischal.varide@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 3/5] Fixing a Possible Null Pointer Dereference. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This Patch addresses a Possible Null Pointer Dereference of variables new_stae, new_conn_state and old_state, old_conn_state in intel_sdvo.c Signed-off-by: Nischal Varide --- drivers/gpu/drm/i915/display/intel_sdvo.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c b/drivers/gpu/drm/i915/display/intel_sdvo.c index 2da4388e1540..186a2d695bb6 100644 --- a/drivers/gpu/drm/i915/display/intel_sdvo.c +++ b/drivers/gpu/drm/i915/display/intel_sdvo.c @@ -2505,6 +2505,9 @@ static int intel_sdvo_atomic_check(struct drm_connector *conn, struct intel_sdvo_connector_state *new_state = to_intel_sdvo_connector_state(new_conn_state); + if (!(new_conn_state && old_conn_state && old_state && new_state)) + return 0; + if (new_conn_state->crtc && (memcmp(&old_state->tv, &new_state->tv, sizeof(old_state->tv)) || memcmp(&old_conn_state->tv, &new_conn_state->tv, sizeof(old_conn_state->tv)))) {