Re: [PATCH] Bluetooth: 6lowpan: Pin module for 6lowpan_control debugfs file

[patchwork-bot+bluetooth@kernel.org]

Hello:

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

On Thu,  8 Oct 2026 12:11:29 +0700 you wrote:
> An open debugfs file retains lowpan_control_fops in the debugfs proxy
> state. However, lowpan_control_fops has no .owner set to THIS_MODULE.
> As a result, full_proxy_open_regular() calls fops_get() which succeeds
> without taking a reference to the bluetooth_6lowpan module.
> 
> With CONFIG_BT_6LOWPAN=m, a userspace process can keep the debugfs file
> descriptor for 6lowpan_control open across module unload
> (delete_module / rmmod bluetooth_6lowpan). When the process subsequently
> closes the file descriptor, full_proxy_release() accesses the already
> freed and unmapped lowpan_control_fops table, causing a kernel page fault
> or oops.
> 
> [...]

Here is the summary with links:
  - Bluetooth: 6lowpan: Pin module for 6lowpan_control debugfs file
    https://git.kernel.org/bluetooth/bluetooth-next/c/b019e48cee2d

You are awesome, thank you!
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