Bug ID 627403: HTTP2 can can crash tmm when stats is updated on aborting of a new connection

Last Modified: Sep 13, 2023

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

Fixed In:
13.0.0, 12.1.2 HF1

Opened: Nov 08, 2016

Severity: 2-Critical

Symptoms

HTTP2 allocates a block of memory for collecting stats on a connection. If the connection is aborted for any reason, tmm may try to update stats prior the memory is allocated.

Impact

Traffic disrupted while tmm restarts.

Conditions

HTTP2 profile is configured and assigned to a virtual.

Workaround

None

Fix Information

A fix stops HTTP2 from accessing stats prior memory is allocated preventing TMM crash for this reason.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips