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 --- Changes in v2: - modify the title description. --- net/bluetooth/mgmt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index f53304cb09db..f1a9f58d1c7e 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -9659,7 +9659,8 @@ void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn, skb = mgmt_alloc_skb(hdev, MGMT_EV_DEVICE_CONNECTED, 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);