test_global_func6.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/* Copyright (c) 2020 Facebook */
 3#include <stddef.h>
 4#include <linux/bpf.h>
 5#include <bpf/bpf_helpers.h>
 6#include "bpf_misc.h"
 7
 8__attribute__ ((noinline))
 9int f1(struct __sk_buff *skb)
10{
11	return skb->len;
12}
13
14int f3(int, struct __sk_buff *skb);
15
16__attribute__ ((noinline))
17int f2(int val, struct __sk_buff *skb)
18{
19	return f1(skb) + f3(val, skb + 1); /* type mismatch */
20}
21
22__attribute__ ((noinline))
23int f3(int val, struct __sk_buff *skb)
24{
25	return skb->ifindex * val;
26}
27
28SEC("tc")
29__failure __msg("modified ctx ptr R2")
30int global_func6(struct __sk_buff *skb)
31{
32	return f1(skb) + f2(2, skb) + f3(3, skb);
33}