Corpus for setpgid:

Coverage	Program
2358	fork-setpgid-syz_open_procfs-fork-setpgid-setpgid
586	seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-setpgid
169	perf_event_open-setpgid
169	perf_event_open-setpgid
69	gettid-setpgid
59	gettid-setpgid