Bug ID 480443: Internal misbehavior of the SPDY filter

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4

Fixed In:
12.0.0, 11.6.0 HF5

Opened: Sep 22, 2014
Severity: 3-Major
Related AskF5 Article:


The SPDY filter may send events to a child flow, after that child flow has been deleted. When a filter for the delete child flow processes this event, it may crash.


The tmm crashes.


The conditions that trigger this are unclear. The fix eliminates the behavior that caused a crash. The crash only occurs with a complex virtual server configuration and even then very rarely.


This issue has no workaround at this time.

Fix Information

The SPDY filter no longer sends events up on deleted child flows, thus preventing a possible crash.

Behavior Change