(gdb) bt
#0  __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:31
#1  0x00007fffcf192681 in realtime_multi_ldap (basedn=<value optimized out>, 
    table_name=0x7fffcc40f040 "extensions", ap=0x7fffcc40f020) at res_config_ldap.c:970
#2  0x0000000000475b9c in ast_load_realtime_multientry (family=0x7ffff1aee780 "extensions") at config.c:2471
#3  0x00007ffff1aede30 in realtime_switch_common (context=0x140ebe0 "default", exten=0x572358 "h", 
    priority=1, data=<value optimized out>, mode=0) at pbx_realtime.c:191
#4  realtime_common (context=0x140ebe0 "default", exten=0x572358 "h", priority=1, 
    data=<value optimized out>, mode=0) at pbx_realtime.c:252
#5  0x00007ffff1aedfc7 in realtime_exists (chan=<value optimized out>, 
    context=0x4d55434f44000000 <Address 0x4d55434f44000000 out of bounds>, exten=0x0, priority=-868158640, 
    callerid=<value optimized out>, data=0x0) at pbx_realtime.c:283
#6  0x00000000004dc028 in pbx_find_extension (chan=0x140e688, bypass=<value optimized out>, 
    q=<value optimized out>, context=<value optimized out>, exten=<value optimized out>, 
    priority=<value optimized out>, label=0x0, callerid=0x14181e0 "1000", action=E_MATCH) at pbx.c:2962
#7  0x00000000004deb5f in pbx_extension_helper (c=0x140e688, con=<value optimized out>, 
    context=0x140ebe0 "default", exten=0x572358 "h", priority=<value optimized out>, 
    label=<value optimized out>, callerid=0x14181e0 "1000", action=E_MATCH, found=0x0, combined_find_spawn=0)
    at pbx.c:4201
#8  0x00000000004e0094 in ast_exists_extension (c=0x4d55434f44000000, context=<value optimized out>, 
    exten=<value optimized out>, priority=<value optimized out>, callerid=<value optimized out>)
    at pbx.c:4862
#9  0x00000000004e0486 in __ast_pbx_run (c=0x140e688, args=<value optimized out>) at pbx.c:5213
#10 0x00000000004e175b in pbx_thread (data=0x4d55434f44000000) at pbx.c:5327
#11 0x000000000051a56a in dummy_start (data=<value optimized out>) at utils.c:1004
#12 0x00007ffff6b079ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#13 0x00007ffff755dcdd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#14 0x0000000000000000 in ?? ()
(gdb) print newparam
$6 = 0x4d55434f44000000 <Address 0x4d55434f44000000 out of bounds>