Bug ID 607724: TMM may crash when in Fallback state.

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1

Fixed In:
13.0.0, 12.1.2

Opened: Jul 28, 2016

Severity: 2-Critical

Related Article: K25713491

Symptoms

There is a chance, when HTTP in Fallback mode, that the HTTP filter will send an Abort event to the TCP filter (causing tear down) prematurely while the Aborting that was triggered by the upper filter/proxy is occurring. TMM may crash when this happens.

Impact

Traffic disrupted while tmm restarts.

Conditions

It is not known exactly what conditions trigger this, but it has been known to occur when issuing HTTP::respond in the LB_FAILED event in an iRule, and it has been seen only rarely.

Workaround

None.

Fix Information

Fixed a rarely occurring tmm crash that might be related to issuing HTTP::respond in the LB_FAILED event in an iRule.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips