Bug ID 1011433: TMM may crash under memory pressure when performing DNS resolution

Last Modified: Jan 28, 2022

Bug Tracker

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

Known Affected Versions:
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, 15.1.4.1, 15.1.5, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1

Opened: Apr 14, 2021
Severity: 2-Critical

Symptoms

When running low on free memory, TMM may crash when performing DNS resolution.

Impact

Traffic disrupted while tmm restarts.

Conditions

-- TMM is under memory pressure. -- TMM is performing DNS resolution via one of the following mechanisms: --+ iRule using the "RESOLV::lookup" command --+ AFM firewall rules that reference hostnames --+ APM

Workaround

None

Fix Information

None

Behavior Change