mirror of https://gitee.com/openkylin/linux.git
49 lines
919 B
C
49 lines
919 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2020 Google LLC.
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*/
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include <errno.h>
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char _license[] SEC("license") = "GPL";
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int monitored_pid = 0;
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int mprotect_count = 0;
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int bprm_count = 0;
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SEC("lsm/file_mprotect")
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int BPF_PROG(test_int_hook, struct vm_area_struct *vma,
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unsigned long reqprot, unsigned long prot, int ret)
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{
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if (ret != 0)
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return ret;
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__u32 pid = bpf_get_current_pid_tgid() >> 32;
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int is_stack = 0;
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is_stack = (vma->vm_start <= vma->vm_mm->start_stack &&
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vma->vm_end >= vma->vm_mm->start_stack);
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if (is_stack && monitored_pid == pid) {
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mprotect_count++;
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ret = -EPERM;
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}
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return ret;
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}
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SEC("lsm/bprm_committed_creds")
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int BPF_PROG(test_void_hook, struct linux_binprm *bprm)
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{
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__u32 pid = bpf_get_current_pid_tgid() >> 32;
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if (monitored_pid == pid)
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bprm_count++;
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return 0;
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}
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