18b08807dSDmitrii Banshchikov // SPDX-License-Identifier: GPL-2.0-only 28b08807dSDmitrii Banshchikov #include <stddef.h> 38b08807dSDmitrii Banshchikov #include <linux/bpf.h> 48b08807dSDmitrii Banshchikov #include <bpf/bpf_helpers.h> 5*95ebb376SAndrii Nakryiko #include "bpf_misc.h" 68b08807dSDmitrii Banshchikov 78b08807dSDmitrii Banshchikov struct S { 88b08807dSDmitrii Banshchikov int x; 98b08807dSDmitrii Banshchikov }; 108b08807dSDmitrii Banshchikov foo(const struct S * s)118b08807dSDmitrii Banshchikov__noinline int foo(const struct S *s) 128b08807dSDmitrii Banshchikov { 138b08807dSDmitrii Banshchikov return bpf_get_prandom_u32() < s->x; 148b08807dSDmitrii Banshchikov } 158b08807dSDmitrii Banshchikov 168b08807dSDmitrii Banshchikov SEC("cgroup_skb/ingress") 17*95ebb376SAndrii Nakryiko __failure __msg("invalid mem access 'mem_or_null'") global_func12(struct __sk_buff * skb)18*95ebb376SAndrii Nakryikoint global_func12(struct __sk_buff *skb) 198b08807dSDmitrii Banshchikov { 208b08807dSDmitrii Banshchikov const struct S s = {.x = skb->len }; 218b08807dSDmitrii Banshchikov 228b08807dSDmitrii Banshchikov return foo(&s); 238b08807dSDmitrii Banshchikov } 24