https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 32346491ddf24599decca06190ebca03ff9de7f8 authored by Linus Torvalds on 10 July 2022, 21:40:51 UTC
Linux 5.19-rc6
Linux 5.19-rc6
Tip revision: 3234649
lsm.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* SafeSetID Linux Security Module
*
* Author: Micah Morton <mortonm@chromium.org>
*
* Copyright (C) 2018 The Chromium OS Authors.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
*/
#ifndef _SAFESETID_H
#define _SAFESETID_H
#include <linux/types.h>
#include <linux/uidgid.h>
#include <linux/hashtable.h>
/* Flag indicating whether initialization completed */
extern int safesetid_initialized __initdata;
enum sid_policy_type {
SIDPOL_DEFAULT, /* source ID is unaffected by policy */
SIDPOL_CONSTRAINED, /* source ID is affected by policy */
SIDPOL_ALLOWED /* target ID explicitly allowed */
};
typedef union {
kuid_t uid;
kgid_t gid;
} kid_t;
enum setid_type {
UID,
GID
};
/*
* Hash table entry to store safesetid policy signifying that 'src_id'
* can set*id to 'dst_id'.
*/
struct setid_rule {
struct hlist_node next;
kid_t src_id;
kid_t dst_id;
/* Flag to signal if rule is for UID's or GID's */
enum setid_type type;
};
#define SETID_HASH_BITS 8 /* 256 buckets in hash table */
/* Extension of INVALID_UID/INVALID_GID for kid_t type */
#define INVALID_ID (kid_t){.uid = INVALID_UID}
struct setid_ruleset {
DECLARE_HASHTABLE(rules, SETID_HASH_BITS);
char *policy_str;
struct rcu_head rcu;
//Flag to signal if ruleset is for UID's or GID's
enum setid_type type;
};
enum sid_policy_type _setid_policy_lookup(struct setid_ruleset *policy,
kid_t src, kid_t dst);
extern struct setid_ruleset __rcu *safesetid_setuid_rules;
extern struct setid_ruleset __rcu *safesetid_setgid_rules;
#endif /* _SAFESETID_H */