Bug ID 494084: Certain rapidly-terminating UDP virtuals may core on standby

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP None(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, 11.5.10, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 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, 11.6.1, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3

Fixed In:
12.0.0

Opened: Dec 03, 2014
Severity: 3-Major

Symptoms

Based on an internal race condition, it is possible for certain flows to cause cores on standby BIG-IPs when using connection mirroring on layer 7 VIPs. This does not apply to use of mirroring on Performance or Performance (HTTP) virtuals.

Impact

Restart of the standby tmm. No connections are affected, though if packets are set to require acknowledgements from the standby there may be a brief delay in processing for some or all connections.

Conditions

Standard UDP virtual using connection mirroring.

Workaround

None

Fix Information

The internal race condition is removed.

Behavior Change