Bug ID 461580: Intermittent kernel panics when using telnet

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
11.6.2 HF1, 11.2.0, 11.2.1, 11.3.0, 11.4.0, 11.4.1

Fixed In:
11.5.1 HF5, 11.5.0 HF5, 11.4.1 HF6, 11.4.0 HF8, 11.3.0 HF10, 11.2.1 HF12

Opened: May 09, 2014

Severity: 3-Major

Related Article: K16454


The kernel panics with a log entry similar to this: slot1/APULTXC102 crit kernel: kernel BUG at drivers/char/n_tty.c:1713!


This causes the BIG-IP system to failover.


It appears to require a use of telnet on the box, possibly with an external monitor that uses telnet.


This issue has no workaround at this time.

Fix Information

Resolved intermittent kernel panic that causes crash using telnet with external monitor.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips