Bug ID 838901: TMM receives invalid rx descriptor from HSB hardware

Last Modified: Oct 16, 2023

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1

Fixed In:
16.0.0, 15.1.2, 14.1.4, 13.1.4

Opened: Oct 15, 2019

Severity: 3-Major


The HSB hardware returns an invalid receive (rx) descriptor to TMM. This results in a TMM core and can be seen as a SIGSEGV in the TMM logs. This also might result in continuous restarts of TMM, resulting in subsequent SIGSEGVs reported in the TMM logs until the unit is manually recovered.


Traffic disrupted while tmm restarts. This may result in continuous TMM restarts until the BIG-IP system is rebooted.


The exact conditions under which this occurs are unknown.



Fix Information


Behavior Change

Guides & references

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