Syscall param setlogin(buf) points to unaddressable byte(s)
   ...
   by 0x........: main (get_set_login.c:14)
 Address 0x........ is 0 bytes inside a block of size 7 free'd
   at 0x........: free (vg_replace_malloc.c:...)
   by 0x........: main (get_set_login.c:13)
 Block was alloc'd at
   at 0x........: malloc (vg_replace_malloc.c:...)
   ...
   by 0x........: main (get_set_login.c:11)

