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Bluetooth: Fix possible NULL pointer dereference

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Checking conn->pending_sec_level if there is no connection leads to potential
null pointer dereference. Don't process pin_code_request_event at all if no
connection exists.

Signed-off-by: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@gmail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Waldemar Rymarkiewicz 2011-09-23 10:01:30 +02:00 committed by Gustavo F. Padovan
parent 67c9e840a0
commit b6f98044a6
1 changed files with 5 additions and 1 deletions
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6
net/bluetooth/hci_event.c
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@ -2174,7 +2174,10 @@ static inline void hci_pin_code_request_evt(struct hci_dev *hdev, struct sk_buff
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
if (conn && conn->state == BT_CONNECTED) {
if (!conn)
goto unlock;
if (conn->state == BT_CONNECTED) {
hci_conn_hold(conn);
conn->disc_timeout = HCI_PAIRING_TIMEOUT;
hci_conn_put(conn);
@ -2194,6 +2197,7 @@ static inline void hci_pin_code_request_evt(struct hci_dev *hdev, struct sk_buff
mgmt_pin_code_request(hdev->id, &ev->bdaddr, secure);
}
unlock:
hci_dev_unlock(hdev);
}