Corpus for add_key$user:

Coverage	Program
669	setregid-add_key$user-keyctl$chown
617	setuid-setuid-add_key$user
489	perf_event_open-add_key$keyring-add_key$user-keyctl$KEYCTL_RESTRICT_KEYRING-add_key$user
381	add_key$fscrypt_v1-add_key$keyring-keyctl$KEYCTL_MOVE-keyctl$setperm-creat-creat-add_key$user-keyctl$KEYCTL_RESTRICT_KEYRING-keyctl$get_keyring_id-signalfd-add_key$fscrypt_v1-seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-ioctl$KDGETMODE-perf_event_open-add_key$keyring-add_key$user-keyctl$KEYCTL_RESTRICT_KEYRING