blob: 418d9c6d495258054b9c0f84017c3cf3d95dad34 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2020 Google LLC.
*/
#include <linux/bpf.h>
#include <errno.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
char _license[] SEC("license") = "GPL";
struct {
__uint(type, BPF_MAP_TYPE_TASK_STORAGE);
__uint(map_flags, BPF_F_NO_PREALLOC);
__type(key, int);
__type(value, int);
} secure_exec_task_map SEC(".maps");
SEC("lsm/bprm_creds_for_exec")
int BPF_PROG(secure_exec, struct linux_binprm *bprm)
{
int *secureexec;
secureexec = bpf_task_storage_get(&secure_exec_task_map,
bpf_get_current_task_btf(), 0,
BPF_LOCAL_STORAGE_GET_F_CREATE);
if (secureexec && *secureexec)
bpf_bprm_opts_set(bprm, BPF_F_BPRM_SECUREEXEC);
return 0;
}
|
