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1// SPDX-License-Identifier: GPL-2.02 3/*4 * Copyright 2020 Google LLC.5 */6 7#include <linux/bpf.h>8#include <errno.h>9#include <bpf/bpf_helpers.h>10#include <bpf/bpf_tracing.h>11 12char _license[] SEC("license") = "GPL";13 14struct {15 __uint(type, BPF_MAP_TYPE_TASK_STORAGE);16 __uint(map_flags, BPF_F_NO_PREALLOC);17 __type(key, int);18 __type(value, int);19} secure_exec_task_map SEC(".maps");20 21SEC("lsm/bprm_creds_for_exec")22int BPF_PROG(secure_exec, struct linux_binprm *bprm)23{24 int *secureexec;25 26 secureexec = bpf_task_storage_get(&secure_exec_task_map,27 bpf_get_current_task_btf(), 0,28 BPF_LOCAL_STORAGE_GET_F_CREATE);29 30 if (secureexec && *secureexec)31 bpf_bprm_opts_set(bprm, BPF_F_BPRM_SECUREEXEC);32 33 return 0;34}35