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

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1

Fixed In:
17.0.0, 16.1.2, 15.1.4.1, 14.1.4.5

Opened: Feb 11, 2021
Severity: 3-Major

Symptoms

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

Impact

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

Conditions

-- 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.

Workaround

None

Fix Information

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

Behavior Change