Bug ID 594642: Stream filter may require large allocations by Tcl leading TMM to core on allocation failure.

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.5.3 HF1, 11.5.3 HF2, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 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, 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, 11.6.1 HF2

Opened: May 20, 2016

Severity: 2-Critical

Symptoms

Stream filter may require large allocations by Tcl leading TMM to core on allocation failure.

Impact

Traffic disrupted while tmm restarts.

Conditions

Stream filter is active during low memory situations

Workaround

None.

Fix Information

Stream may now be configured to parse xbufs in chunks. This limits the maximum amount of memory required and reduces the chance of an allocation failure.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips