Bug ID 615097: Incorrect use of HTTP::collect leads to TMM core.

Last Modified: Nov 14, 2022

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6

Fixed In:
13.0.0, 12.1.3.7

Opened: Sep 08, 2016
Severity: 2-Critical

Symptoms

Incorrect use of HTTP::collect leads to TMM hang. Watchdog kills TMM on timeout leading to core.

Impact

Traffic disrupted while tmm restarts.

Conditions

If the iRule requests non-incremental HTTP::collect or amount greater than content-length when the whole-body has already been received, then this leads to TMM hang.

Workaround

Add an HTTP::release after the HTTP::payload instruction; Or Use incremental HTTP::collect commands.

Fix Information

HTTP state machine was modified to handle non-incremental collects and condition where whole body has been received when the collect is issued.

Behavior Change