Bug ID 1009037: Tcl resume on invalid connection flow can cause tmm crash

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 14.1.2.5, 14.1.2.6, 14.1.2.7, 14.1.2.8, 14.1.3, 14.1.3.1, 14.1.4, 14.1.4.1, 14.1.4.2, 14.1.4.3, 14.1.4.4, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1

Fixed In:
17.0.0, 16.1.2, 15.1.4.1, 14.1.4.5

Opened: Apr 05, 2021
Severity: 2-Critical

Symptoms

Tmm crashes. Tmm logs contain a line that looks like: "Oops @ 0x2bbd463:139: Unallocated flow while polling for rule work. Skipping."

Impact

Traffic disrupted while tmm restarts.

Conditions

1) iRule uses a function that may suspend iRule processing (see https://support.f5.com/csp/article/K12962 for more about this). 2) The connflow associated with the iRule is being torn down by tmm. 3) Depending upon the exact timing there is a rare chance that the iRule will resume on the wrong connflow which can cause a core.

Workaround

None

Fix Information

None

Behavior Change