Bug ID 542137: TMM continually restarts due to HSB failure

Last Modified: Aug 19, 2026

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

Known Affected Versions:
11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4, 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, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Opened: Aug 27, 2015

Severity: 3-Major

Symptoms

The HSB device returns invalid data to TMM, resulting in a TMM core. This condition persists for each TMM start and can be observed in the TMM logs as a series of SIGSEGV or SIGFPE signals every time TMM attempts to start.

Impact

TMM continually restarts, requiring manual intervention to reboot the unit. Traffic disrupted.

Conditions

-- It is unknown under what conditions this error occurs. -- This occurs only on BIG-IP 6900 (D104), 3900 (C106), and 8900 (D106) platforms.

Workaround

None.

Fix Information

None

Behavior Change

Guides & references

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