bpf: lsm: Initialize the BPF LSM hooks
* The hooks are initialized using the definitions in include/linux/lsm_hook_defs.h. * The LSM can be enabled / disabled with CONFIG_BPF_LSM. Signed-off-by: KP Singh <kpsingh@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Brendan Jackman <jackmanb@google.com> Reviewed-by: Florent Revest <revest@google.com> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: James Morris <jamorris@linux.microsoft.com> Link: https://lore.kernel.org/bpf/20200329004356.27286-6-kpsingh@chromium.org
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@ -277,11 +277,11 @@ endchoice
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config LSM
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string "Ordered list of enabled LSMs"
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default "lockdown,yama,loadpin,safesetid,integrity,smack,selinux,tomoyo,apparmor" if DEFAULT_SECURITY_SMACK
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default "lockdown,yama,loadpin,safesetid,integrity,apparmor,selinux,smack,tomoyo" if DEFAULT_SECURITY_APPARMOR
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default "lockdown,yama,loadpin,safesetid,integrity,tomoyo" if DEFAULT_SECURITY_TOMOYO
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default "lockdown,yama,loadpin,safesetid,integrity" if DEFAULT_SECURITY_DAC
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default "lockdown,yama,loadpin,safesetid,integrity,selinux,smack,tomoyo,apparmor"
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default "lockdown,yama,loadpin,safesetid,integrity,smack,selinux,tomoyo,apparmor,bpf" if DEFAULT_SECURITY_SMACK
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default "lockdown,yama,loadpin,safesetid,integrity,apparmor,selinux,smack,tomoyo,bpf" if DEFAULT_SECURITY_APPARMOR
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default "lockdown,yama,loadpin,safesetid,integrity,tomoyo,bpf" if DEFAULT_SECURITY_TOMOYO
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default "lockdown,yama,loadpin,safesetid,integrity,bpf" if DEFAULT_SECURITY_DAC
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default "lockdown,yama,loadpin,safesetid,integrity,selinux,smack,tomoyo,apparmor,bpf"
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help
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A comma-separated list of LSMs, in initialization order.
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Any LSMs left off this list will be ignored. This can be
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@ -12,6 +12,7 @@ subdir-$(CONFIG_SECURITY_YAMA) += yama
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subdir-$(CONFIG_SECURITY_LOADPIN) += loadpin
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subdir-$(CONFIG_SECURITY_SAFESETID) += safesetid
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subdir-$(CONFIG_SECURITY_LOCKDOWN_LSM) += lockdown
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subdir-$(CONFIG_BPF_LSM) += bpf
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# always enable default capabilities
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obj-y += commoncap.o
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@ -30,6 +31,7 @@ obj-$(CONFIG_SECURITY_LOADPIN) += loadpin/
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obj-$(CONFIG_SECURITY_SAFESETID) += safesetid/
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obj-$(CONFIG_SECURITY_LOCKDOWN_LSM) += lockdown/
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obj-$(CONFIG_CGROUP_DEVICE) += device_cgroup.o
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obj-$(CONFIG_BPF_LSM) += bpf/
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# Object integrity file lists
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subdir-$(CONFIG_INTEGRITY) += integrity
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@ -0,0 +1,5 @@
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (C) 2020 Google LLC.
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obj-$(CONFIG_BPF_LSM) := hooks.o
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@ -0,0 +1,26 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020 Google LLC.
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*/
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#include <linux/lsm_hooks.h>
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#include <linux/bpf_lsm.h>
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static struct security_hook_list bpf_lsm_hooks[] __lsm_ro_after_init = {
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#define LSM_HOOK(RET, DEFAULT, NAME, ...) \
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LSM_HOOK_INIT(NAME, bpf_lsm_##NAME),
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#include <linux/lsm_hook_defs.h>
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#undef LSM_HOOK
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};
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static int __init bpf_lsm_init(void)
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{
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security_add_hooks(bpf_lsm_hooks, ARRAY_SIZE(bpf_lsm_hooks), "bpf");
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pr_info("LSM support for eBPF active\n");
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return 0;
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}
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DEFINE_LSM(bpf) = {
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.name = "bpf",
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.init = bpf_lsm_init,
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};
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