CVE-2024-41063

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: cancel all works upon hci_unregister_dev() syzbot is reporting that calling hci_release_dev() from hci_error_reset() due to hci_dev_put() from hci_error_reset() can cause deadlock at destroy_workqueue(), for hci_error_reset() is called from hdev->req_workqueue which destroy_workqueue() needs to flush. We need to make sure that hdev->{rx_work,cmd_work,tx_work} which are queued into hdev->workqueue and hdev->{power_on,error_reset} which are queued into hdev->req_workqueue are no longer running by the moment destroy_workqueue(hdev->workqueue); destroy_workqueue(hdev->req_workqueue); are called from hci_release_dev(). Call cancel_work_sync() on these work items from hci_unregister_dev() as soon as hdev->list is removed from hci_dev_list.

• linux linux kernel (< 4.19.319) • linux linux kernel (>= 4.20 < 5.4.281) • linux linux kernel (>= 5.5 < 5.10.223) • linux linux kernel (>= 5.11 < 5.15.164) • linux linux kernel (>= 5.16 < 6.1.101) • linux linux kernel (>= 6.2 < 6.6.42) • linux linux kernel (>= 6.7 < 6.9.11) • linux linux kernel 6.10