From d170e1ffa17e55d3e58c1be45d3493b8d2e9e633 Mon Sep 17 00:00:00 2001 From: Mengdong Lin Date: Fri, 4 Nov 2016 07:08:27 +0800 Subject: [PATCH] topology: tplg_elem_lookup() checks parameter before searching Check the parameters at first in case of misuse. Signed-off-by: Mengdong Lin Signed-off-by: Takashi Iwai --- src/topology/elem.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/topology/elem.c b/src/topology/elem.c index 029c9abf..724bf262 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); -- 2.47.1