Re: [PATCH] Bluetooth: 6lowpan: Drain RCU readers on registration failure

[patchwork-bot+bluetooth]

Hello:

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

On Thu,  8 Oct 2026 12:11:35 +0800 you wrote:
> A lowpan_btle_dev is embedded in its net_device allocation and must
> remain alive until readers of bt_6lowpan_devices have left their RCU
> sections. setup_netdev() publishes it before registration, but its
> error path only unlinks it before calling free_netdev().
> 
> If a second controller's registration fails while multicast is sent
> on an existing 6LoWPAN interface, send_mcast_pkt() can already have
> selected the new entry. It reads entry->netdev before checking which
> interface owns it. An early failure, such as allocating the device's
> name node, leaves NETREG_UNINITIALIZED, so free_netdev() releases the
> storage immediately.
> 
> [...]

Here is the summary with links:
  - Bluetooth: 6lowpan: Drain RCU readers on registration failure
    https://git.kernel.org/bluetooth/bluetooth-next/c/f664d75735b0

You are awesome, thank you!
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