24 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2#include <stddef.h>3#include <linux/bpf.h>4#include <bpf/bpf_helpers.h>5#include "bpf_misc.h"6 7struct S;8 9__noinline int foo(const struct S *s)10{11 if (s)12 return bpf_get_prandom_u32() < *(const int *) s;13 14 return 0;15}16 17SEC("cgroup_skb/ingress")18__failure __msg("reference type('FWD S') size cannot be determined")19int global_func14(struct __sk_buff *skb)20{21 22 return foo(NULL);23}24