Re: [PATCH] Bluetooth: 6LoWPAN: Use RCU-safe device list removal

[patchwork-bot+bluetooth]

Hello:

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

On Tue,  6 Oct 2026 15:35:23 +0800 you wrote:
> RCU readers of bt_6lowpan_devices must be able to follow an adapter's
> forward link until their read-side critical section ends. The entries
> are published with list_add_rcu(), but device_event() removes an entry
> on NETDEV_UNREGISTER with list_del(), poisoning that link.
> 
> When an adapter is being unregistered and 6LoWPAN is enabled, a
> 6lowpan_control debugfs write with an existing LE L2CAP connection can
> enter lookup_peer() after unregister's first synchronize_net(). If the
> connection has no peer on that adapter, the reader must advance to the
> next list entry. Neither RTNL nor devices_lock excludes this RCU reader.
> 
> [...]

Here is the summary with links:
  - Bluetooth: 6LoWPAN: Use RCU-safe device list removal
    https://git.kernel.org/bluetooth/bluetooth-next/c/fabf38c7e07f

You are awesome, thank you!
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