Bug ID 914293: TMM SIGSEGV and crash

Last Modified: Sep 13, 2023

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

Known Affected Versions:
14.1.2,,,,,,,,, 14.1.3,, 14.1.4, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 16.0.0,, 16.0.1,

Fixed In:
16.1.0,, 15.1.3,

Opened: Jun 04, 2020

Severity: 3-Major


Tmm crash when using iRule to reject connections when Behavioral DoS is enabled.


With heavy traffic, the tmm process might crash. Traffic disrupted while tmm restarts.


This can occur due to an interaction between a Behavioral DoS policy and an iRule designed to potentially drop some of the connections.


Do not use iRules to reject connections that are bound to a virtual server with a Behavioral DoS policy attached.

Fix Information

Fixed a tmm crash related to iRules and Behavioral DoS policies.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips