Corpus for add_key$user:

Coverage	Program
1235	mmap$IORING_OFF_SQ_RING-syz_io_uring_submit-sched_setaffinity-perf_event_open-dup2-getsockopt$sock_cred-statx-add_key$user-add_key$keyring-keyctl$KEYCTL_MOVE-keyctl$KEYCTL_MOVE-keyctl$chown-ioctl$AUTOFS_DEV_IOCTL_REQUESTER-copy_file_range-shmctl$IPC_SET-ioctl$TCXONC-syz_open_procfs-lseek
725	perf_event_open-add_key$user-keyctl$chown-keyctl$update
490	perf_event_open-add_key$keyring-keyctl$KEYCTL_RESTRICT_KEYRING-add_key$user
411	add_key$keyring-keyctl$KEYCTL_RESTRICT_KEYRING-add_key$user