### Description After the upgrade of our system to Debian Buster, kamailio started crashing due to TLS module. The issue look similar to the one described in https://github.com/kamailio/kamailio/issues/1860
In Debian Stretch everything was working fine because we compiled kamailio using openssl-1.0 as suggested in the linked issue. Unfortunately Debian Buster doesn't support that old version of the package so we compiled it with openssl-1.1 and we put in place the workaround suggested here https://github.com/kamailio/kamailio/commit/efdc141ecb5ff72e3224e47deaaa79fe... but this didn't solved the issue.
#### Debugging Data
At the moment I don have full access to the system so I can provide only the following backtrace:
(gdb) bt full #0 aesni_ecb_encrypt () at crypto/aes/aesni-x86_64.s:624 No locals. 0000001 0x00007fe7b2159917 in aesni_ecb_cipher (len=16, in=0x7fe7ae3052d0 "\271a\321\064vGKiB\337\344\070\353\220\005\245\020O", <incomplete sequence \323>, out=0x7fe7ae58d068 "", ctx=0x7fe7ae3053b8) at ../crypto/evp/e_aes.c:319 bl = <optimized out> bl = <optimized out> #2 aesni_ecb_cipher (ctx=0x7fe7ae3053b8, out=0x7fe7ae58d068 "", in=0x7fe7ae3052d0 "\271a\321\064vGKiB\337\344\070\353\220\005\245\020O", <incomplete sequence \323>, len=16) at ../crypto/evp/e_aes.c:311 bl = <optimized out> 0000003 0x00007fe7b2165533 in evp_EncryptDecryptUpdate (ctx=0x7fe7ae3053b8, out=0x7fe7ae58d068 "", outl=0x7fff207dc534, in=0x7fe7ae3052d0 "\271a\321\064vGKiB\337\344\070\353\220\005\245\020O", <incomplete sequence \323>, inl=16) at ../crypto/evp/evp_enc.c:333 i = <optimized out> j = <optimized out> bl = 16 cmpl = <optimized out> #4 0x00007fe7b219830f in drbg_ctr_generate (drbg=0x7fe7ae3051e8, out=0x7fe7ae58d068 "", outlen=32, adin=0x0, adinlen=0) at ../crypto/rand/drbg_ctr.c:340 outl = 16 ctr = 0x7fe7ae305290 #5 0x00007fe7b21991fb in RAND_DRBG_generate (drbg=drbg@entry=0x7fe7ae3051e8, out=out@entry=0x7fe7ae58d068 "", outlen=outlen@entry=32, prediction_resistance=prediction_resistance@entry=0, adin=0x0, adinlen=adinlen@entry=0) at ../crypto/rand/drbg_lib.c:638 reseed_required = <optimized out> #6 0x00007fe7b2199481 in RAND_DRBG_bytes (drbg=0x7fe7ae3051e8, out=0x7fe7ae58d068 "", outlen=32) at ../crypto/rand/drbg_lib.c:679 additional = 0x0 additional_len = 0 chunk = 32 ret = <optimized out> 0000007 0x00007fe7b22f96fd in ssl_fill_hello_random (s=s@entry=0x7fe7ae588de0, server=server@entry=0, result=0x7fe7ae58d068 "", len=len@entry=32, dgrd=dgrd@entry=DOWNGRADE_NONE) at ../ssl/s3_lib.c:4589 send_time = <optimized out> ret = <optimized out> #8 0x00007fe7b231b06e in tls_construct_client_hello (s=0x7fe7ae588de0, pkt=0x7fff207dc700) at ../ssl/statem/statem_clnt.c:1153 p = <optimized out> sess_id_len = <optimized out> i = <optimized out> protverr = 0 comp = <optimized out> sess = 0x0 session_id = <optimized out> 0000009 0x00007fe7b231a33f in write_state_machine (s=0x7fe7ae588de0) at ../ssl/statem/statem.c:843 post_work = 0x7fe7b231f5a0 <ossl_statem_client_post_work> mt = 1 pkt = {buf = 0x7fe7ae59fc90, staticbuf = 0x0, curr = 4, written = 4, maxsize = 18446744073709551615, subs = 0x7fe7ae58be30} ret = <optimized out> pre_work = 0x7fe7b231d180 <ossl_statem_client_pre_work> --Type <RET> for more, q to quit, c to continue without paging-- get_construct_message_f = 0x7fe7b231d250 <ossl_statem_client_construct_message> confunc = 0x7fe7b231ad20 <tls_construct_client_hello> st = 0x7fe7ae588e28 transition = 0x7fe7b231cde0 <ossl_statem_client_write_transition> cb = 0x7fe7b2375fb0 st = <optimized out> ret = <optimized out> transition = <optimized out> pre_work = <optimized out> post_work = <optimized out> get_construct_message_f = <optimized out> cb = <optimized out> confunc = <optimized out> mt = <optimized out> pkt = <optimized out> #10 state_machine (s=0x7fe7ae588de0, server=0) at ../ssl/statem/statem.c:443 buf = 0x0 cb = 0x7fe7b2375fb0 st = <optimized out> ret = <optimized out> ssret = <optimized out> 0000011 0x00007fe7b2306264 in SSL_do_handshake (s=0x7fe7ae588de0) at ../ssl/ssl_lib.c:3599 ret = 1 #12 0x00007fe7b23a40b4 in tls_connect () from /usr/lib/x86_64-linux-gnu/kamailio/modules/tls.so No symbol table info available. 0000013 0x00007fe7b23a568d in tls_encode_f () from /usr/lib/x86_64-linux-gnu/kamailio/modules/tls.so No symbol table info available. #14 0x000055f60cceaf7e in tcp_send () No symbol table info available. 0000015 0x00007fe7b4e65920 in send_pr_buffer () from /usr/lib/x86_64-linux-gnu/kamailio/modules/tm.so No symbol table info available. #16 0x00007fe7b4e826e8 in t_send_branch () from /usr/lib/x86_64-linux-gnu/kamailio/modules/tm.so No symbol table info available. 0000017 0x00007fe7b4e85adf in t_forward_nonack () from /usr/lib/x86_64-linux-gnu/kamailio/modules/tm.so No symbol table info available. #18 0x00007fe7b4e69452 in t_relay_to () from /usr/lib/x86_64-linux-gnu/kamailio/modules/tm.so No symbol table info available. #19 0x00007fe7b4e340ea in ?? () from /usr/lib/x86_64-linux-gnu/kamailio/modules/tm.so No symbol table info available. #20 0x000055f60cc50f29 in do_action () No symbol table info available. 0000021 0x000055f60cc4fa1a in run_actions () No symbol table info available. #22 0x000055f60cc517e2 in do_action () --Type <RET> for more, q to quit, c to continue without paging-- No symbol table info available. 0000023 0x000055f60cc4fa1a in run_actions () No symbol table info available. #24 0x000055f60cc5154f in do_action () No symbol table info available. 0000025 0x000055f60cc4fa1a in run_actions () No symbol table info available. #26 0x000055f60cc5d46f in run_top_route () No symbol table info available. 0000027 0x000055f60cd594cf in receive_msg () No symbol table info available. #28 0x000055f60cc7ab45 in udp_rcv_loop () No symbol table info available. 0000029 0x000055f60cc0febb in main_loop () No symbol table info available. #30 0x000055f60cc07415 in main () No symbol table info available. (gdb)
### Additional Information Kamailio version 5.2.3 Debian Buster 10.1