Wireless Access

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Occasional Contributor II

Master-Local - STM process on 7240's crashed

We are running a master (7210) with locals (7240's) and ran into an issue yesterday.

Users reported connectivity issues/being kicked off the wireless network.  We are still working with TAC but initial indications show that the STM process/module crashed causing the APs to stop communicating with the controllers.

 

We are running ArubaOS 6.3.1.16 and again the case is still being worked by Aruba TAC.

 

It's very odd that both local controllers would crash at the same time.  The local controllers are geographically separated as well as on different L3 networks.  I am wondering if the master controller sent a message/command/process to the local controllers and upon execution of that message/command/process from the master the locals crashed...

 

In any case would be interested to hear if this situation has happened to others?

 

Occasional Contributor II

Re: Master-Local - STM process on 7240's crashed

 

Just to keep this thread updated, after working with TAC/Dev team it was identified the following error log messages are tell-tale signs that malformed UDP packets are being processed by the controller and if enough of them are processed will cause the STM process to crash.

 

un 30 09:06:18 :304001:  <ERRS> |stm|  Unexpected stm (Station management) runtime error at arm_update, 475, arm_update: Invalid sxdr_read_u8 
Jun 30 09:06:18 :304001:  <ERRS> |stm|  Unexpected stm (Station management) runtime error at arm_update, 476, arm_update: Invalid sxdr_read_u32 
Jun 30 09:06:18 :304001:  <ERRS> |stm|  Unexpected stm (Station management) runtime error at arm_get_string_param, 88, No string at offset 2172
Jun 30 09:06:18 :304001:  <ERRS> |stm|  Unexpected stm (Station management) runtime error at arm_update, 479, ARM Update failed for radio d8:c7:c8:39:26:40 
 
================
 
Jun 30 09:05:52 :304001:  <ERRS> |stm|  Unexpected stm (Station management) runtime error at handle_ap_statistics, 1067, Length mismatch expected 13009 received 8564 from AP with eth_mac d8:c7:c8:cb:92:92, and phy_type is 1
Jun 30 09:06:22 :304001:  <ERRS> |stm|  Unexpected stm (Station management) runtime error at handle_ap_statistics, 1067, Length mismatch expected 4050 received 3316 from AP with eth_mac d8:c7:c8:cb:91:40, and phy_type is 1
 
 
Hope to get more information from TAC soon.
 
Community Administrator

Re: Master-Local - STM process on 7240's crashed

Thanks for the update. 

 

 I would definitely like to know the outcome.

CWNA, ACMP, Security +
Occasional Contributor II

Re: Master-Local - STM process on 7240's crashed

Final analysis from Aruba TAC/Engineering was that we were hitting a bug in 6.3.1.16, bug ID 114442.  The fix was released in 6.3.1.17 the following day.  This is also fixed in 6.4.2.8 onwards.

 

 

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