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| author | Hans de Goede <hdegoede@redhat.com> | 2022-03-02 16:44:39 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2022-03-03 13:35:10 +0300 |
| commit | 815d5121927093017947fd76e627da03f0f70be7 (patch) | |
| tree | f8618ffe58fe491cbfc11f00c59921c98802dbf4 /net/bluetooth/mgmt.c | |
| parent | f8e9bd34cedd89b93b1167aa32ab8ecd6c2ccf4a (diff) | |
| download | linux-815d5121927093017947fd76e627da03f0f70be7.tar.xz | |
Bluetooth: hci_core: Fix unbalanced unlock in set_device_flags()
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 fe92ee6425a2 ("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: fe92ee6425a2 ("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>
Diffstat (limited to 'net/bluetooth/mgmt.c')
| -rw-r--r-- | net/bluetooth/mgmt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 533cf60673a3..230a7a8196c0 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -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); |