1 // SPDX-License-Identifier: GPL-2.0-only
3 * Landlock LSM - Credential hooks
5 * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
6 * Copyright © 2018-2020 ANSSI
9 #include <linux/cred.h>
10 #include <linux/lsm_hooks.h>
17 static int hook_cred_prepare(struct cred *const new,
18 const struct cred *const old, const gfp_t gfp)
20 struct landlock_ruleset *const old_dom = landlock_cred(old)->domain;
23 landlock_get_ruleset(old_dom);
24 landlock_cred(new)->domain = old_dom;
29 static void hook_cred_free(struct cred *const cred)
31 struct landlock_ruleset *const dom = landlock_cred(cred)->domain;
34 landlock_put_ruleset_deferred(dom);
37 static struct security_hook_list landlock_hooks[] __lsm_ro_after_init = {
38 LSM_HOOK_INIT(cred_prepare, hook_cred_prepare),
39 LSM_HOOK_INIT(cred_free, hook_cred_free),
42 __init void landlock_add_cred_hooks(void)
44 security_add_hooks(landlock_hooks, ARRAY_SIZE(landlock_hooks),