59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Landlock LSM - Credential hooks
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*
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* Copyright © 2019-2020 Mickaël Salaün <mic@digikod.net>
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* Copyright © 2019-2020 ANSSI
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*/
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#ifndef _SECURITY_LANDLOCK_CRED_H
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#define _SECURITY_LANDLOCK_CRED_H
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#include <linux/cred.h>
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#include <linux/init.h>
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#include <linux/rcupdate.h>
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#include "ruleset.h"
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#include "setup.h"
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struct landlock_cred_security {
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struct landlock_ruleset *domain;
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};
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static inline struct landlock_cred_security *
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landlock_cred(const struct cred *cred)
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{
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return cred->security + landlock_blob_sizes.lbs_cred;
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}
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static inline const struct landlock_ruleset *landlock_get_current_domain(void)
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{
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return landlock_cred(current_cred())->domain;
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}
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/*
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* The call needs to come from an RCU read-side critical section.
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*/
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static inline const struct landlock_ruleset *
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landlock_get_task_domain(const struct task_struct *const task)
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{
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return landlock_cred(__task_cred(task))->domain;
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}
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static inline bool landlocked(const struct task_struct *const task)
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{
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bool has_dom;
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if (task == current)
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return !!landlock_get_current_domain();
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rcu_read_lock();
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has_dom = !!landlock_get_task_domain(task);
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rcu_read_unlock();
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return has_dom;
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}
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__init void landlock_add_cred_hooks(void);
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#endif /* _SECURITY_LANDLOCK_CRED_H */
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