Re: [PATCH] Bluetooth: hci_sock: Serialize dead-device detachment

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>:

On Mon,  5 Oct 2026 00:24:42 +0800 you wrote:
> Rebinding an HCI socket after its controller is unregistered can race
> monitor control replay and crash the kernel. hci_sock_bind() clears
> hci_pi(sk)->hdev and drops the device reference under only the socket
> lock, whereas send_monitor_control_replay() holds hci_sk_list.lock for
> reading.
> 
> Replay can observe a non-NULL hdev, then bind can clear it and drop the
> last reference before create_monitor_ctrl_open() reads hdev->id. This
> can cause a NULL pointer dereference if the pointer is reloaded, or a
> use-after-free if the old pointer is retained.
> 
> [...]

Here is the summary with links:
  - Bluetooth: hci_sock: Serialize dead-device detachment
    https://git.kernel.org/bluetooth/bluetooth-next/c/381a0925c556

You are awesome, thank you!
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