From mboxrd@z Thu Jan 1 00:00:00 1970 From: mengdong.lin@linux.intel.com Subject: [PATCH 6/6] topology: tplg_elem_lookup() checks parameter before searching Date: Fri, 4 Nov 2016 07:08:27 +0800 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by alsa0.perex.cz (Postfix) with ESMTP id 84503266BC4 for ; Fri, 4 Nov 2016 00:07:01 +0100 (CET) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org Cc: Mengdong Lin , tiwai@suse.de, hardik.t.shah@intel.com, guneshwor.o.singh@intel.com, liam.r.girdwood@linux.intel.com, vinod.koul@intel.com, broonie@kernel.org, mengdong.lin@intel.com List-Id: alsa-devel@alsa-project.org From: Mengdong Lin Check the parameters at first in case of misuse. Signed-off-by: Mengdong Lin diff --git a/src/topology/elem.c b/src/topology/elem.c index 029c9ab..724bf26 100644 --- a/src/topology/elem.c +++ b/src/topology/elem.c @@ -111,6 +111,9 @@ struct tplg_elem *tplg_elem_lookup(struct list_head *base, const char* id, struct list_head *pos; struct tplg_elem *elem; + if (!base || !id) + return NULL; + list_for_each(pos, base) { elem = list_entry(pos, struct tplg_elem, list); -- 2.7.4