CVE-2024-41063
Description
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.
How to fix
- linux linux_kernel4.19.319, 5.4.281, 5.10.223, 5.15.164, 6.1.101, 6.6.42, 6.9.11 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 4.19.319, 4.20 ≤ v < 5.4.281, 5.5 ≤ v < 5.10.223, 5.11 ≤ v < 5.15.164, 5.16 ≤ v < 6.1.101, 6.2 ≤ v < 6.6.42, 6.7 ≤ v < 6.9.11, 6.10 | 4.19.319, 5.4.281, 5.10.223, 5.15.164, 6.1.101, 6.6.42, 6.9.11 |
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