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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Facebook */
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
char _license[] SEC("license") = "GPL";
struct callback_ctx {
int dummy;
};
static long write_task(struct task_struct *task, struct vm_area_struct *vma,
struct callback_ctx *data)
{
/* writing to task, which is illegal */
task->mm = NULL;
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_task, &data, 0);
return 0;
}
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