Bug ID 421909: TMM crash, due to memory-pool access without memory barriers

Last Modified: Oct 10, 2018

Bug Tracker

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

Known Affected Versions:
11.3.0, 11.4.0

Fixed In:
11.5.0, 11.4.0 HF3, 11.3.0 HF6

Opened: May 27, 2013
Severity: 2-Critical

Symptoms

Rare condition where multiple TMM threads are accessing the same memory-pool, can cause memory corruption, leading to TMM crash.

Impact

Traffic disrupted while tmm restarts.

Conditions

Bad synchronization between threads, rarely triggered under heavy traffic activity.

Workaround

None

Fix Information

AVR has been optimized to prevent possible memory corruption and crashes.

Behavior Change