// SPDX-License-Identifier: GPL-2.0 | |
#include "vmlinux.h" | |
#include <bpf/bpf_tracing.h> | |
#include <bpf/bpf_helpers.h> | |
#include "bpf_misc.h" | |
char _license[] SEC("license") = "GPL"; | |
int bpf_sock_destroy(struct sock_common *sk) __ksym; | |
SEC("tp_btf/tcp_destroy_sock") | |
__failure __msg("calling kernel function bpf_sock_destroy is not allowed") | |
int BPF_PROG(trace_tcp_destroy_sock, struct sock *sk) | |
{ | |
/* should not load */ | |
bpf_sock_destroy((struct sock_common *)sk); | |
return 0; | |
} | |