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Bluetooth: hci_core: Fix unbalanced unlock in set_device_flags()

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There is only one "goto done;" in set_device_flags() and this happens
*before* hci_dev_lock() is called, move the done label to after the
hci_dev_unlock() to fix the following unlock balance:

[   31.493567] =====================================
[   31.493571] WARNING: bad unlock balance detected!
[   31.493576] 5.17.0-rc2+ #13 Tainted: G         C  E
[   31.493581] -------------------------------------
[   31.493584] bluetoothd/685 is trying to release lock (&hdev->lock) at:
[   31.493594] [<ffffffffc07603f5>] set_device_flags+0x65/0x1f0 [bluetooth]
[   31.493684] but there are no more locks to release!

Note this bug has been around for a couple of years, but before
commit fe92ee6425 ("Bluetooth: hci_core: Rework hci_conn_params flags")
supported_flags was hardcoded to "((1U << HCI_CONN_FLAG_MAX) - 1)" so
the check for unsupported flags which does the "goto done;" never
triggered.

Fixes: fe92ee6425 ("Bluetooth: hci_core: Rework hci_conn_params flags")
Cc: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Hans de Goede 2022-03-02 14:44:39 +01:00 committed by Marcel Holtmann
parent f8e9bd34ce
commit 815d512192
1 changed files with 1 additions and 1 deletions
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2
net/bluetooth/mgmt.c
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@ -4541,9 +4541,9 @@ static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
}
}
done:
hci_dev_unlock(hdev);
done:
if (status == MGMT_STATUS_SUCCESS)
device_flags_changed(sk, hdev, &cp->addr.bdaddr, cp->addr.type,
supported_flags, current_flags);