Corpus for getpgrp:

Coverage	Program
127	perf_event_open-socket$nl_xfrm-sendmsg$nl_xfrm-sendmsg$nl_xfrm-preadv-readv-getpgrp
93	perf_event_open-write$binfmt_elf64-socket$inet-setsockopt$SO_TIMESTAMPING-setsockopt$SO_TIMESTAMP-sendto-recvmmsg-ioctl$BTRFS_IOC_SUBVOL_SETFLAGS-creat-getsockopt$sock_cred-getpgrp-tgkill-getpgrp-fcntl$lock-ioctl$FS_IOC_GETFSMAP-sendmsg$NFNL_MSG_CTHELPER_NEW-ioctl$sock_SIOCETHTOOL-setsockopt$netlink_NETLINK_LISTEN_ALL_NSID-prlimit64-openat$procfs
68	syz_mount_image$vfat-perf_event_open-mkdirat-getpgrp-socket$netlink-socket$netlink-fsetxattr$trusted_overlay_redirect-setsockopt$sock_int-bind$inet6-listen-sendto