Crashes FreeRadius 3.0.11 using rlm_rest/libcurl + rlm_cache_rbtree

RANJALAHY RASOLOFOMANANA, Bija bija.ranjalahy at
Wed Jun 28 13:09:45 CEST 2017

Hi all,

We are frequently facing a crash of our freeradius server on live production environment (8 times in 2 months).
The crash can't be reproduced on our test environment so we need help.
Sometimes, we have a core dump (case 1- the server crashes), sometimes, we don't (case 2- the server freezes).
Unfortunately, the core dumps don't provide useful informations:
Here are examples of the core dumps :
core 1:
#0  0x00000034b680f5db in ?? ()
#1  0x00007fa718d066c6 in ?? ()
#2  0x0000000000000000 in ?? ()

core 2:
#0  0x00000034b680f5db in ?? ()
#1  0x00007f169f94e6c6 in ?? ()
#2  0x0000000000000000 in ?? ()

Freeradius version : 3.0.11
Context : our server sends REST request to a http server to retrieve data which are then stored in a cache during 1 hour.
The problem started when we added this feature.

Leads :
1- The server logs all http requests that are sent.
   Somehow, the line log is truncated when the problem appears. Maybe, it is just a coincidence but we are suspecting this part.
   We use the rlm_rest module + libcurl to make our requests.

   Have you encountered a problem using those module/library ?
   We tried to upgrade libcurl from 7.50.3 to 7.54.0 but this doesn't fix the problem.

2- In the case 2 (the server freezes), we've got the following message in our log files:
   Mon Jun 26 22:00:31 2017 : Error: (10180900) Ignoring duplicate packet from client xxx port 21665 - ID: 164 due to unfinished request in component authorize module <our cache module>

   Our cache module is based on the rlm_cache_rbtree module:
   cache <cache name> {
        driver = "rlm_cache_rbtree"
   Have you encountered a problem using rlm_cache_rbtree module ?

Thanks for your help.
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