Bug ID 625085: lasthop rmmod causes kernel panic

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP All(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2

Fixed In:
12.1.2 HF1

Opened: Oct 26, 2016
Severity: 3-Major


If someone attempts to unload the lasthop kernel module, it will cause a kernel panic.


The system reboots.


Attempting to unload the lasthop kernel module.


Avoid running the following command: # rmmod lasthop

Fix Information

The lasthop kernel module should never be unloaded. The system now prevents the lasthop kernel module from being unloaded, so no kernel panic occurs.

Behavior Change