Corpus for sigaltstack:

Coverage	Program
298	perf_event_open-sigaltstack
281	perf_event_open-sigaltstack
224	syz_io_uring_setup-syz_io_uring_submit-sigaltstack-sigaltstack
77	syz_io_uring_setup-syz_io_uring_submit-sigaltstack-sigaltstack
75	syz_io_uring_setup-syz_io_uring_submit-sigaltstack-sigaltstack
74	syz_io_uring_setup-syz_io_uring_submit-sigaltstack
59	syz_io_uring_setup-syz_io_uring_submit-sigaltstack