**Description**

I have installed kamailio 5.6.3(from debian repo) on Debian 12. Try testing with openvas and some case, I saw kamailio crashes.

Mar 19 12:55:45 hostname kamailio[1789359]: CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f0429907ea0), called from tls: tls_init.c: ser_free(323), first free tls: tls_init.c: ser_free(323) - ignoring Mar 19 12:55:45 hostname kamailio[1789361]: CRITICAL: <core> [core/mem/q_malloc.c:123]: qm_debug_check_frag(): BUG: qm: fragm. 0x7f0429907ee8 (address 0x7f0429907f20) beginning overwritten (80)! Memory allocator was called from tls: tls_init.c:323. Fragment marked by tls: tls_init.c:293. Exec from core/mem/q_malloc.c:511. Mar 19 12:55:45 hostname kamailio[1789367]: CRITICAL: <core> [core/pass_fd.c:277]: receive_fd(): EOF on 620 Mar 19 12:55:45 hostname kamailio[1788962]: ALERT: <core> [main.c:774]: handle_sigs(): child process 1789361 exited by a signal 6.

Next step, I added option --atexit=no to args - result same.

Next step, I tried to build kamailio 5.7.4 from source and re-run testing, the result was the same - kamailio was crash.

After that, I tried use `tlsa` module instead of `tlsa`, but it not resolve problem.

Backtrace: [kamailio_5.6.3_backtrace_full.txt](https://github.com/kamailio/kamailio/files/14669895/kamailio_5.6.3_backtrace...) [kamailio_5.6.3_backtrace.txt](https://github.com/kamailio/kamailio/files/14669896/kamailio_5.6.3_backtrace...)

**Additional Information**

openssl version

OpenSSL 3.0.11 19 Sep 2023 (Library: OpenSSL 3.0.11 19 Sep 2023)

**Kamailio**:

kamailio -v

version: kamailio 5.6.3 (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_BLOCKLIST, 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 12.2.0

kamailio -v

version: kamailio 5.7.4 (x86_64/linux) c717c0 flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, MEM_JOIN_FREE, 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_BLOCKLIST, 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: c717c0 compiled on 13:23:19 Mar 20 2024 with gcc 12.2.0

**OS**:

lsb_release -a

No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 12 (bookworm) Release: 12 Codename: bookworm

uname -a

Linux hostname 6.1.0-18-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.76-1 (2024-02-01) x86_64 GNU/Linux