| // 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; |
| } |
