35 lines
723 B
C
35 lines
723 B
C
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// 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 <linux/bpf.h>
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#include <errno.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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char _license[] SEC("license") = "GPL";
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struct {
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__uint(type, BPF_MAP_TYPE_TASK_STORAGE);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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__type(key, int);
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__type(value, int);
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} secure_exec_task_map SEC(".maps");
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SEC("lsm/bprm_creds_for_exec")
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int BPF_PROG(secure_exec, struct linux_binprm *bprm)
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{
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int *secureexec;
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secureexec = bpf_task_storage_get(&secure_exec_task_map,
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bpf_get_current_task_btf(), 0,
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BPF_LOCAL_STORAGE_GET_F_CREATE);
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if (secureexec && *secureexec)
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bpf_bprm_opts_set(bprm, BPF_F_BPRM_SECUREEXEC);
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return 0;
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}
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