Bug ID 748572: Occasionally ramcache might crash when data is sent without the corresponding event.

Last Modified: Jul 12, 2023

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

Known Affected Versions:
13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 13.1.5, 13.1.5.1, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.0.1.1, 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

Fixed In:
15.0.0, 14.1.3.1

Opened: Nov 02, 2018

Severity: 2-Critical

Symptoms

Ramcache filter causes crash when sending data without HUDCTL_RESPONSE while in CACHE_COLLECT event.

Impact

Traffic disrupted while tmm restarts.

Conditions

When the access_policy_trace db variable is enabled, failure in insertion of policy path cookie in the header while sending a redirect to the client might cause the ramcache filter to SIGSEGV.

Workaround

Turn off the access_policy_trace db variable.

Fix Information

The system now handles this scenario, so there is no longer a ramcache crash.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips