Bluetooth: Add check for mgmt_alloc_skb() in mgmt_device_connected()

Add check for the return value of mgmt_alloc_skb() in
mgmt_device_connected() to prevent null pointer dereference.

Fixes: e96741437ef0 ("Bluetooth: mgmt: Make use of mgmt_send_event_skb in MGMT_EV_DEVICE_CONNECTED")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 6df014d582c10ab9cd1f7852317d9229fd130d5a..4fd30ba243be5fb8b68188c8fd9d1235fd24e1d2 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -9620,6 +9620,9 @@ void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
                                     sizeof(*ev) + (name ? eir_precalc_len(name_len) : 0) +
                                     eir_precalc_len(sizeof(conn->dev_class)));
 
+       if (!skb)
+               return;
+
        ev = skb_put(skb, sizeof(*ev));
        bacpy(&ev->addr.bdaddr, &conn->dst);
        ev->addr.type = link_to_bdaddr(conn->type, conn->dst_type);