usrsock/dns: add sanity check before send dns event

Signed-off-by: chao an <anchao@xiaomi.com>
2023-06-02 14:14:01 +08:00 · 2023-06-02 14:14:01 +08:00 · 7c5d2a8bdd
parent a720984eb7
commit 7c5d2a8bdd
1 changed files with 4 additions and 0 deletions
--- a/drivers/usrsock/usrsock_rpmsg_server.c
+++ b/drivers/usrsock/usrsock_rpmsg_server.c
@ -941,6 +941,10 @@ static int usrsock_rpmsg_send_dns_event(FAR void *arg,
  uint32_t len;

  dns = rpmsg_get_tx_payload_buffer(ept, &len, true);
+  if (dns == NULL)
+    {
+      return -ENOMEM;
+    }

  dns->head.msgid = USRSOCK_RPMSG_DNS_EVENT;
  dns->head.flags = USRSOCK_MESSAGE_FLAG_EVENT;