[kernel PATCH v2 1/1] Bluetooth: hci_sync: hold hdev->lock when cleanup hci_conn

From: Zhengping Jiang
Date: Tue Aug 23 2022 - 00:44:51 EST


When disconnecting all devices, hci_conn_failed is used to cleanup
hci_conn object when the hci_conn object cannot be aborted.
The function hci_conn_failed requires the caller holds hdev->lock.

Fixes: 9b3628d79b46f ("Bluetooth: hci_sync: Cleanup hci_conn if it cannot be aborted")

Signed-off-by: Zhengping Jiang <jiangzp@xxxxxxxxxx>
---

Changes in v2:
- Update commit message

Changes in v1:
- Hold hdev->lock for hci_conn_failed

net/bluetooth/hci_sync.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 74a0cd5d0b37f..e08c0503027d8 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -5034,9 +5034,11 @@ int hci_abort_conn_sync(struct hci_dev *hdev, struct hci_conn *conn, u8 reason)
/* Cleanup hci_conn object if it cannot be cancelled as it
* likelly means the controller and host stack are out of sync.
*/
- if (err)
+ if (err) {
+ hci_dev_lock(hdev);
hci_conn_failed(conn, err);
-
+ hci_dev_unlock(hdev);
+ }
return err;
case BT_CONNECT2:
return hci_reject_conn_sync(hdev, conn, reason);
--
2.37.1.595.g718a3a8f04-goog