[06/22] topology: tplg_elem_lookup() checks parameter before searching
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Message ID 71fe37d22156ec663c2841e994c4881b9678ed78.1477549962.git.mengdong.lin@linux.intel.com
State New
Headers show

Commit Message

mengdong.lin@linux.intel.com Oct. 27, 2016, 7:12 a.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>

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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);