da4282c17d
When CONFIG_BPF_LSM is not configured, running bpf selftesting will show BPF_F_BPRM_SECUREEXEC undefined error for bprm_opts.c. The problem is that bprm_opts.c includes vmliunx.h. The vmlinux.h is generated by "bpftool btf dump file ./vmlinux format c". On the other hand, BPF_F_BPRM_SECUREEXEC is defined in include/uapi/linux/bpf.h and used only in bpf_lsm.c. When CONFIG_BPF_LSM is not set, bpf_lsm will not be compiled, so vmlinux.h will not include definition of BPF_F_BPRM_SECUREEXEC. Ideally, we want to compile bpf selftest regardless of the configuration setting, so change the include file from vmlinux.h to bpf.h. Signed-off-by: Jiang Wang <jiang.wang@bytedance.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20201224011242.585967-1-jiang.wang@bytedance.com
35 lines
723 B
C
35 lines
723 B
C
// 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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