// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2021 Facebook */ #include "vmlinux.h" #include <bpf/bpf_helpers.h> #define vm_flags vm_start char _license[] SEC("license") = "GPL"; struct callback_ctx { int dummy; }; static long write_vma(struct task_struct *task, struct vm_area_struct *vma, struct callback_ctx *data) { /* writing to vma, which is illegal */ vma->vm_flags |= 0x55; return 0; } SEC("raw_tp/sys_enter") int handle_getpid(void) { struct task_struct *task = bpf_get_current_task_btf(); struct callback_ctx data = {}; bpf_find_vma(task, 0, write_vma, &data, 0); return 0; }