1a/ we set the LD_LIBRARY_PATH environment variable to one single dot (the current working directory) and approximately ARG_MAX colons (the maximum number of bytes for the argument and environment list); as described in man ld.so:

1b/ we set the RLIMIT_DATA resource limit to ARG_MAX * sizeof(char *) (2MB on amd64, 1MB on i386); as described in man setrlimit: