Hi Henning, Thank you for the suggestions.
We are currently using OpenSSL 3+ and confirmed that the tls_threads_mode parameter is already set to 2. At this time, we do not have plans to upgrade to version 6.1.3. Best regards, Darshan Mody On Mon, Jun 15, 2026 at 1:46 PM Henning Westerholt <[email protected]> wrote: > (spelling fix) It should now be much better. From: Henning Westerholt via > sr-dev <sr-dev@ lists. kamailio. org> Sent: Montag, 15. Juni 2026 10: 05 > To: Kamailio (SER) - Development Mailing List <sr-dev@ lists. kamailio. > org> Cc: Mody, Darshan > > > (spelling fix) > > > > It should now be much better. > > > > *From:* Henning Westerholt via sr-dev <[email protected]> > *Sent:* Montag, 15. Juni 2026 10:05 > *To:* Kamailio (SER) - Development Mailing List <[email protected] > > > *Cc:* Mody, Darshan <[email protected]>; Henning Westerholt < > [email protected]> > *Subject:* [sr-dev] Re: Coredumps with redis, http_async_client over TLS > > > > Hello Mody, > > > > some time ago we had issues in this area after the shift towards openssl > 3.x in the tls module together with other modules running with https. > > > > But this should not be much better. > > > > Just to double check, you set the core parameter tls_thread_mode to 2? You > can also try to update to 6.1.3, just to verify that it was not fixed > already. > > > > If you have a core dump, you can create an issue with the backtrace. > > https://www.kamailio.org/wikidocs/tutorials/troubleshooting/coredumpfile/ > <https://urldefense.com/v3/__https://www.kamailio.org/wikidocs/tutorials/troubleshooting/coredumpfile/__;!!AlswS5g!mrwIfZGU7DtR4pZm5zjJmzxQvVupO-H79lYgqMmZ0ohsBqv7PW8je0lrYP-RSOobbtA6BqFZajk$> > > > > Cheers, > > > > Henning > > > > *From:* Mody, Darshan via sr-dev <[email protected]> > *Sent:* Montag, 15. Juni 2026 05:16 > *To:* [email protected] > *Cc:* Mody, Darshan <[email protected]> > *Subject:* [sr-dev] Coredumps with redis, http_async_client over TLS > > > > Hi, > > > > We are currently using Kamailio version 6.1.1 with the redis and > http_async_client modules, both of which are configured to run over > encrypted channels. > > > > We have encountered core dumps and identified heap corruption during > debugging. The issue appears to be related to conflicts between ser_free > and OpenSSL context free (SSL_CTX_free). > > > > Has anyone else experienced similar issues with this configuration? > > > > Warm Regards, > > Darshan >
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