[kernel,v2,0/1] Clear workqueue to avoid use-after-free

Message

Zhengping Jiang Feb. 24, 2023, 7:53 p.m. UTC

After the hci_sync rework, cmd_sync_work was cleared when calling
hci_unregister_dev, but not when powering off the adapter.
Use-after-free errors happen when a work is still scheduled
when cmd is freed by __mgmt_power_off.

Changes in v2:
- Add function to clear the queue without stop the timer

Changes in v1:
- Clear cmd_sync_work queue before clearing the mgmt cmd list

Zhengping Jiang (1):
  Bluetooth: hci_sync: clear workqueue before clear mgmt cmd

 net/bluetooth/hci_sync.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)