mirror of
https://github.com/Qortal/Brooklyn.git
synced 2025-01-31 15:22:18 +00:00
46 lines
830 B
C
46 lines
830 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
/*
|
|
* Copyright 2020 Google LLC.
|
|
*/
|
|
|
|
#include "vmlinux.h"
|
|
#include <errno.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
#include <bpf/bpf_tracing.h>
|
|
|
|
u32 monitored_pid = 0;
|
|
|
|
struct {
|
|
__uint(type, BPF_MAP_TYPE_RINGBUF);
|
|
__uint(max_entries, 1 << 12);
|
|
} ringbuf SEC(".maps");
|
|
|
|
char _license[] SEC("license") = "GPL";
|
|
|
|
SEC("lsm.s/bprm_committed_creds")
|
|
void BPF_PROG(ima, struct linux_binprm *bprm)
|
|
{
|
|
u64 ima_hash = 0;
|
|
u64 *sample;
|
|
int ret;
|
|
u32 pid;
|
|
|
|
pid = bpf_get_current_pid_tgid() >> 32;
|
|
if (pid == monitored_pid) {
|
|
ret = bpf_ima_inode_hash(bprm->file->f_inode, &ima_hash,
|
|
sizeof(ima_hash));
|
|
if (ret < 0 || ima_hash == 0)
|
|
return;
|
|
|
|
sample = bpf_ringbuf_reserve(&ringbuf, sizeof(u64), 0);
|
|
if (!sample)
|
|
return;
|
|
|
|
*sample = ima_hash;
|
|
bpf_ringbuf_submit(sample, 0);
|
|
}
|
|
|
|
return;
|
|
}
|