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
11 struct Small {
12 long x;
13 };
14
15 struct 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
28 SEC("cgroup_skb/ingress")
29 __failure __msg("invalid indirect access to stack")
30 int 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 }
36
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