// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */ #include <vmlinux.h> #include <bpf/bpf_tracing.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" #include "nested_trust_common.h" char _license[] SEC("license") = "GPL"; struct { __uint(type, BPF_MAP_TYPE_SK_STORAGE); __uint(map_flags, BPF_F_NO_PREALLOC); __type(key, int); __type(value, u64); } sk_storage_map SEC(".maps"); /* Prototype for all of the program trace events below: * * TRACE_EVENT(task_newtask, * TP_PROTO(struct task_struct *p, u64 clone_flags) */ SEC("tp_btf/task_newtask") __failure __msg("R2 must be") int BPF_PROG(test_invalid_nested_user_cpus, struct task_struct *task, u64 clone_flags) { bpf_cpumask_test_cpu(0, task->user_cpus_ptr); return 0; } /* Although R2 is of type sk_buff but sock_common is expected, we will hit untrusted ptr first. */ SEC("tp_btf/tcp_probe") __failure __msg("R2 type=untrusted_ptr_ expected=ptr_, trusted_ptr_, rcu_ptr_") int BPF_PROG(test_invalid_skb_field, struct sock *sk, struct sk_buff *skb) { bpf_sk_storage_get(&sk_storage_map, skb->next, 0, 0); return 0; }