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 | struct Small { |
8 | long x; |
9 | }; |
10 | |
11 | struct 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 | |
24 | SEC("cgroup_skb/ingress" ) |
25 | __failure __msg("invalid indirect access to stack" ) |
26 | int 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 | |