// SPDX-License-Identifier: GPL-2.0 #include "vmlinux.h" #include <bpf/bpf_helpers.h> #include "bpf_misc.h" SEC("tc/ingress") __description("uninit/mtu: write rejected") __success __caps_unpriv(CAP_BPF|CAP_NET_ADMIN) __failure_unpriv __msg_unpriv("invalid read from stack") int tc_uninit_mtu(struct __sk_buff *ctx) { __u32 mtu; bpf_check_mtu(ctx, 0, &mtu, 0, 0); return TCX_PASS; } char LICENSE[] SEC("license") = "GPL";