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
 7#if !defined(__clang__)
 8#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
 9#endif
10
11struct Small {
12	long x;
13};
14
15struct Big {
16	long x;
17	long y;
18};
19
20__noinline int foo(const struct Big *big)
21{
22	if (!big)
23		return 0;
24
25	return bpf_get_prandom_u32() < big->y;
26}
27
28SEC("cgroup_skb/ingress")
29__failure __msg("invalid indirect access to stack")
30int global_func10(struct __sk_buff *skb)
31{
32	const struct Small small = {.x = skb->len };
33
34	return foo((struct Big *)&small) ? 1 : 0;
35}

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