Corpus for add_key$user:

Coverage	Program
556	add_key$keyring-add_key$user-keyctl$revoke-add_key$user
449	add_key$keyring-keyctl$KEYCTL_RESTRICT_KEYRING-add_key$user
427	perf_event_open-add_key$keyring-keyctl$KEYCTL_RESTRICT_KEYRING-add_key$user
128	add_key$user
122	add_key$user