Last Modified: Jan 07, 2026
Affected Product(s):
BIG-IP LTM
Fixed In:
11.6.0
Opened: Sep 16, 2013 Severity: 3-Major Related Article:
K15558
Tmm crashes, usually with a "umem_backstore_free: no such allocation" panic message.
Traffic disrupted while tmm restarts.
If an iRule command which is affected by this bug is executed in a server-side context at a time when there is no client-side connection, then tmm will probably crash.
None.
iRule crash bug fixed.