Bug ID 602136: iRule drop/discard/reject commands causes tmm segfault or still sends 3-way handshake to the server.

Last Modified: Oct 17, 2023

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

Known Affected Versions:
11.2.1, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2

Fixed In:
13.0.0, 12.1.2 HF1, 11.6.3.2

Opened: Jun 29, 2016

Severity: 2-Critical

Related Article: K89647578

Symptoms

If you have a client-side iRule that terminates a client-side connection, either tmm will segfault or the BIG-IP system still sends the SYN to the server, and then a RST. The reset cause will be 'TCP 3WHS rejected'.

Impact

TMM segfaults or the BIG-IP system still sends a SYN to the server. Traffic disrupted while tmm restarts.

Conditions

Client-side iRule that terminates a connection using one of the following commands: - drop - discard - reject

Workaround

There is no workaround at this time.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips