Bug ID 430552: Wrong connection flow handling CMP response may cause TMM to core

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.3.0, 11.4.0, 11.4.1

Fixed In:
11.5.0, 11.4.1 HF6, 11.4.0 HF4, 11.3.0 HF8

Opened: Sep 13, 2013
Severity: 1-Blocking
Related AskF5 Article:
K14587

Symptoms

On rare occasions, a race condition may allow the wrong connection flow to handle Clustered Multiprocessing (CMP) responses. The CMP messages for flows that are quickly created and destroyed may match a flow that was already destroyed.

Impact

Traffic disrupted while tmm restarts.

Conditions

This issue can occur on any device using CMP messaging.

Workaround

None.

Fix Information

Added handling to protect against attributing a CMP message to the wrong flow.

Behavior Change