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 34SEC("tp_btf/task_newtask") 35__failure __msg("R1 must have zero offset when passed to release func or trusted arg to kfunc") 36int 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. */ 43SEC("tp_btf/tcp_probe") 44__failure __msg("R2 type=untrusted_ptr_ expected=ptr_, trusted_ptr_, rcu_ptr_") 45int 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