kernel module to cleanup leaked net_device reference

[DanielQujun]

Hi,

When I read the article Try to Fix Two Linux Kernel Bugs While Testing TiDB Operator in K8s，I noticed you guys developed a Kernel module to clean up leaked net_device reference.

If that possible would you please share this Module with us? Since we don't want to reboot our system which is running in production, I'm trying to fix this issue online by run this module then install the kpatch.

Sorry for opening issue here, cause I do not found a way to write this module by myself.

[zhouqiang-cl]

@ethercflow PTAL