1// SPDX-License-Identifier: GPL-2.0-only 2#include <stddef.h> 3#include <linux/bpf.h> 4#include <bpf/bpf_helpers.h> 5#include "bpf_misc.h" 6 7struct Small { 8 long x; 9}; 10 11struct Big { 12 long x; 13 long y; 14}; 15 16__noinline int foo(const struct Big *big) 17{ 18 if (!big) 19 return 0; 20 21 return bpf_get_prandom_u32() < big->y; 22} 23 24SEC("cgroup_skb/ingress") 25__failure __msg("invalid indirect access to stack") 26int global_func10(struct __sk_buff *skb) 27{ 28 const struct Small small = {.x = skb->len }; 29 30 return foo((struct Big *)&small) ? 1 : 0; 31} 32