From: Mengdong Lin <mengdong.lin@xxxxxxxxxxxxxxx>
Check the parameters at first in case of misuse.
Signed-off-by: Mengdong Lin <mengdong.lin@xxxxxxxxxxxxxxx>
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
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