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[6/6] topology: tplg_elem_lookup() checks parameter before searching

Message ID f31dce536fa9c35377e4bdc559d6fc35b8bf884c.1478212626.git.mengdong.lin@linux.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

mengdong.lin@linux.intel.com Nov. 3, 2016, 11:08 p.m. UTC 
From: Mengdong Lin <mengdong.lin@linux.intel.com>

Check the parameters at first in case of misuse.

Signed-off-by: Mengdong Lin <mengdong.lin@linux.intel.com>
diff mbox

Patch

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);