Corpus for add_key$user:

Coverage	Program
370	perf_event_open-ioctl$BLKTRACESTART-ioctl$BLKTRACETEARDOWN-add_key$keyring-keyctl$setperm-keyctl$get_security-getuid-add_key$user-keyctl$setperm-keyctl$KEYCTL_MOVE-syz_open_procfs-readv-epoll_ctl$EPOLL_CTL_ADD
361	add_key$user