Dec 28 16:08:53 webrtc /usr/sbin/kamailio[803]: CRITICAL:
          <core> [core/mem/q_malloc.c:519]: qm_free(): BUG:
          freeing already freed pointer (0x7f55756c2ab8), called from
          tls: tls_init.c: ser_free(323), first free tls: tls_init.c:
          ser_malloc(293) - ignoring

Dec 28 16:08:53 webrtc /usr/sbin/kamailio[803]:
          CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free():
          BUG: freeing already freed pointer (0x7f55756c3138), called
          from tls: tls_init.c: ser_free(323), first free tls:
          tls_init.c: ser_malloc(293) - ignoring
... omit vervose ...

Dec 28 16:08:53 webrtc /usr/sbin/kamailio[803]: CRITICAL:
          <core> [core/mem/q_malloc.c:519]: qm_free(): BUG:
          freeing already freed pointer (0x7f55756c1f38), called from
          tls: tls_init.c: ser_free(323), first free tls: tls_init.c:
          ser_free(323) - ignoring
...
 omit verbose ...

Dec 28 16:08:53 webrtc /usr/sbin/kamailio[803]: CRITICAL:
        <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing
        already freed pointer (0x7f557569f250), called from tls:
        tls_init.c: ser_free(323), first free tls: tls_init.c:
        ser_realloc(299) - ignoring
Dec 28 16:08:53 webrtc /usr/sbin/kamailio[803]: CRITICAL:
        <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing
        already freed pointer (0x7f557565cf60), called from tls:
        tls_init.c: ser_free(323), first free tls: tls_init.c:
        ser_malloc(293) - ignoring
Dec 28 16:08:53 webrtc /usr/sbin/kamailio[803]: INFO:
        <core> [core/sctp_core.c:53]: sctp_core_destroy(): SCTP
        API not initialized
root@webrtc:/etc/kamailio# lsb_release -a

No LSB modules are available.

Distributor ID:    Debian

Description:    Debian GNU/Linux 10 (buster)

Release:    10

Codename:    buster

root@webrtc:/etc/kamailio# free -m

              total        used        free      shared 
        buff/cache   available

Mem:          16041         134       15551        
        108         356       15524

Swap:           974           0         974

version: kamailio 5.4.3 (x86_64/linux) 

flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS,
          USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK,
          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, TLS_PTHREAD_MUTEX_SHARED

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 8.3.0
SHM_MEMORY=512

PKG_MEMORY=32

root@webrtc:/etc/kamailio# apt show openssl

Package: openssl

Version: 1.1.1d-0+deb10u4

Priority: optional

Section: utils

Maintainer: Debian OpenSSL Team
          <pkg-openssl-devel@lists.alioth.debian.org>

Installed-Size: 1.495 kB

Depends: libc6 (>= 2.15), libssl1.1 (>= 1.1.1)

Suggests: ca-certificates

Homepage: https://www.openssl.org/

Download-Size: 843 kB

APT-Manual-Installed: no

APT-Sources: http://security.debian.org/debian-security
          buster/updates/main amd64 Packages

Description: juego de herramientas Secure Sockets Layer
          - utilidad criptográfica

 Este paquete forma parte de la implementación del
          proyecto OpenSSL de los

 protocolos criptográficos SSL y TLS para la
          comunicación segura a través de

 Internet.

 .

 Contiene el binario de propósito general para la línea
          de órdenes

 /usr/bin/openssl,

 útil para operaciones criptográficas como:

  * creación de parámetros clave RSA, DH y DSA;

  * creación de certificados X.509, CSR y CRL;

  * calcular resúmenes de mensajes;

  * cifrado y descifrado con cifras;

  * probar clientes y servidores SSL/TLS;

  * gestión de correo firmado o cifrado S/MIME.