[SR-Users] Fwd: Stack smash error when using auth_ephemeral with KEMI

Daniel-Constantin Mierla miconda at gmail.com
Mon May 13 10:33:52 CEST 2019 

Hello,

can you get from the core of 5.2 nightly
(https://pastebin.com/XHsFAiJp), the output for following gdb commands:

bt full

frame 5

list

info locals

p *spassword

Cheers,
Daniel

On 13.05.19 09:57, Grant Bagdasarian wrote:
> Hi Daniel,
>
> No, both result in the stack smash error.
> I've tried with the following deb packages. They all lead to the same issue.
> - 5.2.1 stable
> - 5.2.2 stable
> - 5.2. nightly
> - devel nightly
>
> Core dump for 5.2.1: https://pastebin.com/tTUUk4YH
> Core dump for 5.2.2 nightly: https://pastebin.com/XHsFAiJp
>
> I'm running Kamailio inside a Docker container (using the official
> Docker image: kamailio/kamailio from Docker Hub).
>
> Hope this is clear.
>
> Regards,
>
> Grant
>
> On Mon, May 13, 2019 at 9:45 AM Daniel-Constantin Mierla
> <miconda at gmail.com> wrote:
>> Hi Grant,
>>
>> for clarification -- using the dedicated KEMI function is working fine? Only when using x.modf() is crashing?
>>
>> Cheers,
>> Daniel
>>
>> On 12.05.19 10:23, Grant Bagdasarian wrote:
>>
>> Hi Daniel,
>>
>> Yes, I’ve only been using the dedicated KEMI functions. This was just a simple try to see what would happen.
>> Anyways, thanks for the tip!
>>
>> Regards,
>> Grant
>>
>> On Sun, 12 May 2019 at 09:42, Daniel-Constantin Mierla <miconda at gmail.com> wrote:
>>> Hello,
>>>
>>> have you tried the dedicated KEMI functions?
>>>
>>>   -
>>> http://kamailio.org/docs/tutorials/devel/kamailio-kemi-framework/modules/#auth_ephemeral
>>>
>>> KSR.x.modf() must be avoided as much as possible, because it is an
>>> workaround which can also lead to memory leaks if the kamailio.cfg
>>> functions don't have a free fixup function.
>>>
>>> Cheers,
>>> Daniel
>>>
>>> On 12.05.19 00:16, Grant Bagdasarian wrote:
>>>> Hi Daniel,
>>>>
>>>> FYI, the following also ends up in the stack smash error:
>>>> _.x.modf("autheph_authenticate", "1576734089:grant", "1234")
>>>>
>>>> I also tried with the devel nightly deb package, which also resulted
>>>> in the same error.
>>>> I'm unsure if this error also happens when using the native Kamailio
>>>> script, as my routing logic is built using the Python3 module.
>>>> Will give the native script a try soon, and report back.
>>>>
>>>> Regards,
>>>>
>>>> Grant
>>>>
>>>> On Tue, May 7, 2019 at 11:08 PM Grant Bagdasarian
>>>> <grantbagdasarian at gmail.com> wrote:
>>>>> Hi Daniel,
>>>>>
>>>>> I used the latest Docker image for Kamailio 5.2.2 and then changed the
>>>>> apt kamailio.list file to contain the nightly build and
>>>>> updated/upgraded kamailio. Hope this is enough to target the latest
>>>>> git 5.2 version.
>>>>> If not, please let me know.
>>>>>
>>>>> deb     http://deb.kamailio.org/kamailio52-nightly stretch main
>>>>> deb-src http://deb.kamailio.org/kamailio52-nightly stretch main
>>>>>
>>>>> https://pastebin.com/XHsFAiJp
>>>>>
>>>>> It still ends in a stacksmash error.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Grant
>>>>>
>>>>> On Fri, May 3, 2019 at 11:56 AM Daniel-Constantin Mierla
>>>>> <miconda at gmail.com> wrote:
>>>>>> Hello,
>>>>>>
>>>>>> can you try with latest git branch 5.2? I pushed a commit that
>>>>>> eventually fixes it.
>>>>>>
>>>>>> Cheers,
>>>>>> Daniel
>>>>>>
>>>>>> On 02.05.19 23:54, Grant Bagdasarian wrote:
>>>>>>> Hi Daniel,
>>>>>>>
>>>>>>> See pastebin url below for the backtrace.
>>>>>>> https://pastebin.com/tTUUk4YH
>>>>>>>
>>>>>>> Hopefully I did it the right way. Please let me know if you need anything else.
>>>>>>> FYI, Kamailio is running inside of a docker container.
>>>>>>>
>>>>>>> version: kamailio 5.2.1 (x86_64/linux)
>>>>>>> flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS,
>>>>>>> USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM,
>>>>>>> SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY,
>>>>>>> USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER,
>>>>>>> USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
>>>>>>> ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144 MAX_URI_SIZE
>>>>>>> 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
>>>>>>> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
>>>>>>> id: unknown
>>>>>>> compiled with gcc 6.3.0
>>>>>>>
>>>>>>> I can easily replicate this, but to be sure I've saved the core file
>>>>>>> locally on my machine.
>>>>>>>
>>>>>>> Regards,
>>>>>>>
>>>>>>> Grant
>>>>>>>
>>>>>>> On Thu, May 2, 2019 at 10:05 AM Daniel-Constantin Mierla
>>>>>>> <miconda at gmail.com> wrote:
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> can you get a core file for this case?
>>>>>>>>
>>>>>>>> Set `ulimit -c unlimited` before starting Kamailio as root and run again.
>>>>>>>>
>>>>>>>> Once you have the core file, get the backtrace with gdb.
>>>>>>>>
>>>>>>>> Cheers,
>>>>>>>> Daniel
>>>>>>>>
>>>>>>>> On 01.05.19 20:26, Grant Bagdasarian wrote:
>>>>>>>>> Hello,
>>>>>>>>>
>>>>>>>>> I was trying out the auth_ephemeral module inside the xhttp
>>>>>>>>> event_route in Python KEMI, and discovered a possible bug.
>>>>>>>>>
>>>>>>>>> https://pastebin.com/4Ghumfis
>>>>>>>>>
>>>>>>>>> The following will result in the stack smash error. Whenever I leave
>>>>>>>>> out the unixtimestamp the
>>>>>>>>> module will complain about not being able to convert to an int, which
>>>>>>>>> make sense, but doesn't lead to a stack smash error and a complete
>>>>>>>>> crash of Kamailio.
>>>>>>>>>
>>>>>>>>> KSR.auth_ephemeral.autheph_authenticate("1576734089:grant", "1234").
>>>>>>>>>
>>>>>>>>> According to the documentation this module can only be used in
>>>>>>>>> REQUEST_ROUTE, but I found a presentation online which also used this
>>>>>>>>> module and that particular function in event_route, which is what I
>>>>>>>>> need for WebSocket authentication.
>>>>>>>>>
>>>>>>>>> Hope this helps. Please let me know if you need more information.
>>>>>>>>>
>>>>>>>>> Regards,
>>>>>>>>>
>>>>>>>>> Grant
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> Kamailio (SER) - Users Mailing List
>>>>>>>>> sr-users at lists.kamailio.org
>>>>>>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>>>>> --
>>>>>>>> Daniel-Constantin Mierla -- www.asipto.com
>>>>>>>> www.twitter.com/miconda -- www.linkedin.com/in/miconda
>>>>>>>> Kamailio World Conference - May 6-8, 2019 -- www.kamailioworld.com
>>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Kamailio (SER) - Users Mailing List
>>>>>>> sr-users at lists.kamailio.org
>>>>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>>> --
>>>>>> Daniel-Constantin Mierla -- www.asipto.com
>>>>>> www.twitter.com/miconda -- www.linkedin.com/in/miconda
>>>>>> Kamailio World Conference - May 6-8, 2019 -- www.kamailioworld.com
>>>>>>
>>> --
>>> Daniel-Constantin Mierla -- www.asipto.com
>>> www.twitter.com/miconda -- www.linkedin.com/in/miconda
>>>
>> --
>> Daniel-Constantin Mierla -- www.asipto.com
>> www.twitter.com/miconda -- www.linkedin.com/in/miconda

-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda

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