Bug ID 993457: TMM core with ACCESS::policy evaluate iRule

Last Modified: Feb 07, 2024

Affected Product(s):
BIG-IP APM(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,, 15.1.3,, 15.1.4, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1

Fixed In:
17.0.0, 16.1.2,,

Opened: Feb 11, 2021

Severity: 3-Major


TMM segfaults in packtag_literal_pointer_release() during TCLRULE_CLIENT_CLOSED event attempting a session release.


This triggers a race condition and causes the tmm crash. Traffic disrupted while tmm restarts.


-- The ACCESS::policy evaluate is still in progress when TCLRULE_CLIENT_CLOSED event is triggered. -- While the TCLRULE_CLIENT_CLOSED is in process, the ACCESS::policy evaluation completes.



Fix Information

TMM no longer crashes and generates a core file during the ACCESS::policy evaluate iRule under these conditions.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips