Bug ID 442336: FastL4 virtual may crash with SERVER_CONNECTED rule and acceleration

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10

Fixed In:
11.6.0, 11.5.2, 11.4.1 HF9, 11.4.0 HF6

Opened: Jan 07, 2014
Severity: 2-Critical
Related Article:


In a FastL4 virtual server with hardware cookie enabled and accelerated, and there is a SERVER_CONNECTED rule is in place, when the SERVER_CONNECTED rule fails, the flow is aborted while it is still in the packet path, and tmm produces a segv and crashes.


TMM crashes.


This occurs with a FastL4 virtual server, syncookie enabled, PVA accelerated and configured with SERVER_CONNECTED rule (this rule fails).


turn off syncookie

Fix Information

TMM no longer crashes when there is a FastL4 virtual server, syncookie is enabled, PVA is accelerated, and a configured SERVER_CONNECTED rule fails.

Behavior Change