Doesn't work for me.
Stock at&t 4.2.2 (firmware 5.18), bootloader locked, s-on. Output on temproot: [*] Attempting to acquire root. This will take 5-10 minutes, be patient
error in setsockopt().
Failed to get prepare_kernel_cred address.
Failed to get commit_creds address.
Failed to get ptmx_fops address.
Failed to setup variables.