[root@chantry rtdm]# ltrace insmod simple_rtdm.ko 
__libc_start_main(0x400eb0, 2, 0x7fff786dcca8, 0x4012e0, 0x4012d0 <unfinished ...>
calloc(1, 1)                                                       = 0x602010
strrchr("insmod", '/')                                             = NULL
strstr(NULL, "insmod.static" <unfinished ...>
--- SIGSEGV (Segmentation fault) ---
+++ killed by SIGSEGV +++
[root@chantry rtdm]# ltrace /sbin/insmod simple_rtdm.ko 
__libc_start_main(0x400eb0, 2, 0x7fff258d0e98, 0x4012e0, 0x4012d0 <unfinished ...>
calloc(1, 1)                                                       = 0x602010
strrchr("/sbin/insmod", '/')                                       = "/insmod"
strstr("insmod", "insmod.static")                                  = NULL
__errno_location()                                                 = 0x2b3e85732690
create_module(0, 0, 0x7fff258d18e9, 0, 105)                        = -1
malloc(16384)                                                      = 0x602030
open("simple_rtdm.ko", 0, 00)                                      = 3
read(3, "\177ELF\002\001\001", 16384)                              = 8406
read(3, "", 7978)                                                  = 0
close(3)                                                           = 0
init_module(0x602030, 8406, 0x602010, -1, 524288)                  = 0
exit(0 <unfinished ...>
+++ exited (status 0) +++