Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.3.0, 11.4.0, 11.4.1
Fixed In:
11.5.0, 11.4.1 HF4, 11.4.0 HF6
Opened: Sep 16, 2013 Severity: 3-Major Related Article:
K15167
The tmm process may crash when a connection is reset, typically with a panic message such as 'freed invalid pcb magic'.
Traffic disrupted while tmm restarts.
This occurs when the following conditions are met: -- A TCP iRule event other than CLIENT_CLOSED or SERVER_CLOSED is suspended. -- The peer sends a RST packet on the connection. -- There is an error in the suspended iRule, possibly as a side-effect of the RST packet being received. -- Code for a CLIENT_CLOSED or SERVER_CLOSED iRule event does exist.
Remove CLIENT_CLOSED and SERVER_CLOSED event, or run tmm.debug.
Resolved an issue that would cause TMM to crash if a TCP iRule is suspended with an error while the peer sends a packet.