[PATCH] bluetooth: Add check for mgmt_alloc_skb()

[Haoxiang Li]

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@xxxxxxxxxxxxxxx
Signed-off-by: Haoxiang Li <haoxiang_li2024@xxxxxxx>
---
 net/bluetooth/mgmt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index f53304cb09db..1f028c5105ca 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -9660,6 +9660,8 @@ 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);
-- 
2.25.1