I think I may be seeing the same thing on Fedora 26, openssl-1.1.0f-7.fc26.x86_64, and Kamailio 5.0 branch @ 2d1dc7c ``` Core was generated by `/usr/sbin/kamailio -m 256 -M 8 -P /run/kamailio/kamailio.pid'. Program terminated with signal SIGSEGV, Segmentation fault. #0 ossl_init_thread_stop (locals=0x7f22ca6c0418) at crypto/init.c:332 332 if (locals->async) { (gdb) info locals No locals. (gdb) bt full #0 ossl_init_thread_stop (locals=0x7f22ca6c0418) at crypto/init.c:332 No locals. #1 0x00007f22db819f2d in OPENSSL_cleanup () at crypto/init.c:400 currhandler = <optimized out> lasthandler = <optimized out> #2 0x00007f22dc879c38 in __run_exit_handlers (status=0, listp=0x7f22dcc0a5b8 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at exit.c:83 atfct = <optimized out> onfct = <optimized out> cxafct = <optimized out> f = <optimized out> #3 0x00007f22dc879c8a in __GI_exit (status=<optimized out>) at exit.c:105 No locals. #4 0x000000000041a2e1 in handle_sigs () at main.c:699 chld = 4291806 chld_status = 5359628 any_chld_stopped = 0 memlog = 6 __func__ = "handle_sigs" #5 0x0000000000423f42 in main_loop () at main.c:1758 i = 2 pid = 1671 si = 0x0 si_desc = "udp receiver child=1 sock=[2603:300A:134:50E0:0:0:0:3]:5060\000\000\000\000\000P\213ʈ\377\177\000\000\220?0\334"\177\000\000Ћʈ\377\177\000\000\321.\335\333"\177\000\000\360\206\060\334"\177\000\000\000\000\000\000\001\000\000\000X\216\033\334"\177\000\000huz\312"\177\000" nrprocs = 2 woneinit = 1 __func__ = "main_loop" #6 0x0000000000429b83 in main (argc=7, argv=0x7fff88ca8e88) at main.c:2646 cfg_stream = 0x297b010 c = -1 r = 0 tmp = 0x7fff88caaee9 "" tmp_len = 0 port = 0 proto = 0 options = 0x72a500 ":f:cm:M:dVIhEeb:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:x:X:Y:" ret = -1 seed = 3909515647 rfd = 4 debug_save = 0 debug_flag = 0 dont_fork_cnt = 0 n_lst = 0x7f22dd2558d0 p = 0x7fff88ca8ce0 "\377\377\377\377" st = {st_dev = 21, st_ino = 977, st_nlink = 2, st_mode = 16872, st_uid = 986, st_gid = 983, __pad0 = 0, st_rdev = 0, st_size = 40, st_blksize = 4096, st_blocks = 0, st_atim = {tv_sec = 1500938501, tv_nsec = 19585566}, st_mtim = {tv_sec = 1500938501, tv_nsec = 19585566}, st_ctim = {tv_sec = 1500938501, tv_nsec = 19585566}, __glibc_reserved = {0, 0, 0}} __func__ = "main" (gdb) info locals cfg_stream = 0x297b010 c = -1 r = 0 tmp = 0x7fff88caaee9 "" tmp_len = 0 port = 0 proto = 0 options = 0x72a500 ":f:cm:M:dVIhEeb:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:x:X:Y:" ret = -1 seed = 3909515647 rfd = 4 debug_save = 0 debug_flag = 0 dont_fork_cnt = 0 n_lst = 0x7f22dd2558d0 p = 0x7fff88ca8ce0 "\377\377\377\377" st = {st_dev = 21, st_ino = 977, st_nlink = 2, st_mode = 16872, st_uid = 986, st_gid = 983, __pad0 = 0, st_rdev = 0, st_size = 40, st_blksize = 4096, st_blocks = 0, st_atim = {tv_sec = 1500938501, tv_nsec = 19585566}, st_mtim = { tv_sec = 1500938501, tv_nsec = 19585566}, st_ctim = {tv_sec = 1500938501, tv_nsec = 19585566}, __glibc_reserved = {0, 0, 0}} __func__ = "main"
```