selftests/bpf/test_verifier.c

951 		/* We need the fd to stay open so it can be used in fd_array.
972 static void fixup_prog_kfuncs(struct bpf_insn *prog, int *fd_array,
997 					/* We put bpf_testmod module fd into fd_array
1000 					*fd_array = btf__fd(testmod_btf);
1012 			  struct bpf_insn *prog, int *map_fds, int *fd_array)
1237 	fixup_prog_kfuncs(prog, fd_array, test->fixup_kfunc_btf_id);
1523 	int fd_array[2] = { -1, -1 };
1544 	do_test_fixup(test, prog_type, prog, map_fds, &fd_array[1]);
1578 	if (fd_array[1] != -1)
1579 		opts.fd_array = &fd_array[0];