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 | |
11 | char _license[] SEC("license" ) = "GPL" ; |
12 | |
13 | struct { |
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 | |
26 | SEC("tp_btf/task_newtask" ) |
27 | __failure __msg("R2 must be" ) |
28 | int 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 | SEC("tp_btf/task_newtask" ) |
35 | __failure __msg("R1 must have zero offset when passed to release func or trusted arg to kfunc" ) |
36 | int BPF_PROG(test_invalid_nested_offset, struct task_struct *task, u64 clone_flags) |
37 | { |
38 | bpf_cpumask_first_zero(&task->cpus_mask); |
39 | return 0; |
40 | } |
41 | |
42 | /* Although R2 is of type sk_buff but sock_common is expected, we will hit untrusted ptr first. */ |
43 | SEC("tp_btf/tcp_probe" ) |
44 | __failure __msg("R2 type=untrusted_ptr_ expected=ptr_, trusted_ptr_, rcu_ptr_" ) |
45 | int BPF_PROG(test_invalid_skb_field, struct sock *sk, struct sk_buff *skb) |
46 | { |
47 | bpf_sk_storage_get(&sk_storage_map, skb->next, 0, 0); |
48 | return 0; |
49 | } |
50 | |