Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
3
4#include <vmlinux.h>
5#include <bpf/bpf_tracing.h>
6#include <bpf/bpf_helpers.h>
7#include "bpf_misc.h"
8
9#include "nested_trust_common.h"
10
11char _license[] SEC("license") = "GPL";
12
13struct {
14 __uint(type, BPF_MAP_TYPE_SK_STORAGE);
15 __uint(map_flags, BPF_F_NO_PREALLOC);
16 __type(key, int);
17 __type(value, u64);
18} sk_storage_map SEC(".maps");
19
20/* Prototype for all of the program trace events below:
21 *
22 * TRACE_EVENT(task_newtask,
23 * TP_PROTO(struct task_struct *p, u64 clone_flags)
24 */
25
26SEC("tp_btf/task_newtask")
27__failure __msg("R2 must be")
28int BPF_PROG(test_invalid_nested_user_cpus, struct task_struct *task, u64 clone_flags)
29{
30 bpf_cpumask_test_cpu(0, task->user_cpus_ptr);
31 return 0;
32}
33
34/* Although R2 is of type sk_buff but sock_common is expected, we will hit untrusted ptr first. */
35SEC("tp_btf/tcp_probe")
36__failure __msg("R2 type=untrusted_ptr_ expected=ptr_, trusted_ptr_, rcu_ptr_")
37int BPF_PROG(test_invalid_skb_field, struct sock *sk, struct sk_buff *skb)
38{
39 bpf_sk_storage_get(&sk_storage_map, skb->next, 0, 0);
40 return 0;
41}