Bug ID 625085: lasthop rmmod causes kernel panic

Last Modified: Aug 19, 2026

Affected Product(s):
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, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Opened: Oct 26, 2016

Severity: 3-Major

Symptoms

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

Impact

The system reboots.

Conditions

Attempting to unload the lasthop kernel module.

Workaround

Avoid running the following command: # rmmod lasthop

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips