mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Tingmao WangandMickaël Salaün
5f12f8effb
The quietness behaviour is as documented in the previous patch. For optional accesses, since the existing deny_masks can only store 2x4bit of layer index, with no way to represent "no layer", we need to either expand it or have another field to correctly handle quieting of those. This commit uses the latter approach - we add another field to store which optional access (of the 2) are covered by quiet rules in their respective layers as stored in deny_masks. Assisted-by: GitHub-Copilot:claude-opus-4.8 copilot-review Signed-off-by: Tingmao Wang <m@maowtm.org> Link: https://patch.msgid.link/2510a357a94183683eefc49917dcb2240d67be96.1781228815.git.m@maowtm.org [mic: Cosmetic fixes] Signed-off-by: Mickaël Salaün <mic@digikod.net>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Landlock - Audit helpers
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*
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* Copyright © 2023-2025 Microsoft Corporation
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*/
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#ifndef _SECURITY_LANDLOCK_AUDIT_H
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#define _SECURITY_LANDLOCK_AUDIT_H
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#include <linux/audit.h>
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#include <linux/lsm_audit.h>
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#include "access.h"
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#include "cred.h"
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enum landlock_request_type {
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LANDLOCK_REQUEST_PTRACE = 1,
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LANDLOCK_REQUEST_FS_CHANGE_TOPOLOGY,
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LANDLOCK_REQUEST_FS_ACCESS,
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LANDLOCK_REQUEST_NET_ACCESS,
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LANDLOCK_REQUEST_SCOPE_ABSTRACT_UNIX_SOCKET,
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LANDLOCK_REQUEST_SCOPE_SIGNAL,
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};
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/*
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* We should be careful to only use a variable of this type for
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* landlock_log_denial(). This way, the compiler can remove it entirely if
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* CONFIG_AUDIT is not set.
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*/
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struct landlock_request {
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/* Mandatory fields. */
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enum landlock_request_type type;
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struct common_audit_data audit;
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/**
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* layer_plus_one: First layer level that denies the request + 1. The
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* extra one is useful to detect uninitialized field.
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*/
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size_t layer_plus_one;
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/* Required field for configurable access control. */
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access_mask_t access;
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/* Required fields for requests with layer masks. */
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const struct layer_masks *layer_masks;
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/* Required fields for requests with deny masks. */
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const access_mask_t all_existing_optional_access;
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deny_masks_t deny_masks;
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optional_access_t quiet_optional_accesses;
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};
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#ifdef CONFIG_AUDIT
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void landlock_log_drop_domain(const struct landlock_hierarchy *const hierarchy);
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void landlock_log_denial(const struct landlock_cred_security *const subject,
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const struct landlock_request *const request);
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#else /* CONFIG_AUDIT */
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static inline void
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landlock_log_drop_domain(const struct landlock_hierarchy *const hierarchy)
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{
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}
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static inline void
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landlock_log_denial(const struct landlock_cred_security *const subject,
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const struct landlock_request *const request)
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{
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}
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#endif /* CONFIG_AUDIT */
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#endif /* _SECURITY_LANDLOCK_AUDIT_H */
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