Bug ID 530761: TMM crash in DNS processing on a TCP virtual

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
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, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8

Fixed In:
12.0.0, 11.6.1, 11.5.4

Opened: Jun 30, 2015
Severity: 3-Major

Symptoms

TMM can crash while processing DNS requests on a TCP virtual server.

Impact

Traffic disrupted while tmm restarts.

Conditions

A TCP DNS virtual server combined with a DNS iRule that suspends and a client that closes its connection before receiving a response to its DNS request.

Workaround

While no true workaround exists, the situation can be avoiding by removing any one of the conditions above.

Fix Information

TMM now properly handles DNS requests through a TCP virtual where the client closes the connection during iRule processing.

Behavior Change