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// SPDX-License-Identifier: GPL-2.0-only
/*
* Landlock LSM - Security framework setup
*
* Copyright © 2016-2020 Mickaël Salaün <mic@digikod.net>
* Copyright © 2018-2020 ANSSI
*/
#include <linux/bits.h>
#include <linux/init.h>
#include <linux/lsm_hooks.h>
#include "common.h"
#include "cred.h"
#include "errata.h"
#include "fs.h"
#include "ptrace.h"
#include "setup.h"
bool landlock_initialized __lsm_ro_after_init = false;
struct lsm_blob_sizes landlock_blob_sizes __lsm_ro_after_init = {
.lbs_cred = sizeof(struct landlock_cred_security),
.lbs_inode = sizeof(struct landlock_inode_security),
.lbs_superblock = sizeof(struct landlock_superblock_security),
};
int landlock_errata __ro_after_init;
static void __init compute_errata(void)
{
size_t i;
#ifndef __has_include
/*
* This is a safeguard to make sure the compiler implements
* __has_include (see errata.h).
*/
WARN_ON_ONCE(1);
return;
#endif
for (i = 0; landlock_errata_init[i].number; i++) {
const int prev_errata = landlock_errata;
if (WARN_ON_ONCE(landlock_errata_init[i].abi >
landlock_abi_version))
continue;
landlock_errata |= BIT(landlock_errata_init[i].number - 1);
WARN_ON_ONCE(prev_errata == landlock_errata);
}
}
static int __init landlock_init(void)
{
compute_errata();
landlock_add_cred_hooks();
landlock_add_ptrace_hooks();
landlock_add_fs_hooks();
landlock_initialized = true;
pr_info("Up and running.\n");
return 0;
}
DEFINE_LSM(LANDLOCK_NAME) = {
.name = LANDLOCK_NAME,
.init = landlock_init,
.blobs = &landlock_blob_sizes,
};
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