<fix>

修复警告，判断对入参指针是否为空进行
Signed-off-by: Nxiacong <xiacong4@huawei.com>
Change-Id: I4a061df9f676e04eb23e16e5b513c59ba0bfdb09
Signed-off-by: Nxiacong <xiacong4@huawei.com>

sys/dev/usb/net/if_urndis.c

@@ -547,6 +547,9 @@ urndis_ctrl_handle_query(struct urndis_softc *sc,
 {
 	const struct urndis_query_comp *msg;
 	uint64_t limit;
+        if (hdr == NULL || buf == NULL || bufsz == NULL) {
+            return RNDIS_STATUS_FAILURE;
+        }
 
 	msg = (const struct urndis_query_comp *)hdr;